WO2025129702A1 - Downlink transmission triggering method, communication device, and storage medium - Google Patents

Abstract

Embodiments of the present application provide a downlink transmission triggering method, a communication device, and a storage medium. The downlink transmission triggering method comprises: sending a first transmission to a first network device, wherein the first transmission is used for triggering a second network device or the first network device to send a second transmission to a terminal.

Description

Downlink transmission triggering method, communication device and storage medium Technical Field

The present disclosure relates to the field of communication technology, and in particular to a downlink transmission triggering method, a communication device, and a storage medium.

Background Art

In order to reduce the energy consumption of base stations and the network side, the network energy saving (NES) technology is proposed. NES technology limits the transmission and reception of network devices in the time domain and increases the sleep time of network devices, thereby achieving the purpose of energy saving.

Summary of the invention

The embodiments of the present disclosure provide a downlink transmission triggering method, a communication device, and a storage medium.

According to a first aspect of an embodiment of the present disclosure, a downlink transmission triggering method is provided, which is executed by a terminal, and the method includes: sending a first transmission to a first network device; the first transmission is used to trigger a second network device or the first network device to send a second transmission to the terminal.

According to a second aspect of an embodiment of the present disclosure, a downlink transmission triggering method is provided, which is executed by a first network device and includes: receiving a first transmission sent by a terminal; the first transmission is used to trigger a second network device or the first network device to send a second transmission.

According to a third aspect of an embodiment of the present disclosure, a downlink transmission triggering method is provided, which is executed by a second network device and includes: receiving a first transmission from a terminal from a first network device; the first transmission is used to trigger the second network device to send a second transmission to the terminal.

According to a fourth aspect of an embodiment of the present disclosure, a terminal is provided, comprising: a sending module configured to send a first transmission to a first network device; the first transmission is used to trigger a second network device or the first network device to send a second transmission to the terminal.

According to a fifth aspect of an embodiment of the present disclosure, a first network device is provided, comprising: a receiving module configured to receive a first transmission sent by a terminal; the first transmission is used to trigger a second network device or the first network device to send a second transmission.

According to a sixth aspect of an embodiment of the present disclosure, a second network device is provided, comprising: a receiving module configured to receive a first transmission from a terminal from a first network device; the first transmission is used to trigger the second network device to send a second transmission to the terminal.

According to the seventh aspect of an embodiment of the present disclosure, a communication device is provided, wherein the communication device includes: one or more processors; wherein the processor is used to call instructions so that the communication device executes the downlink transmission triggering method provided by any technical solution of the first to third aspects mentioned above.

According to an eighth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the downlink transmission triggering method provided by any aspect from the first aspect to the third aspect.

According to the technical solution provided by the embodiment of the present disclosure, the terminal can trigger the first network device and/or the second network device to send the second transmission through the first transmission, so that the terminal can request downlink transmission from the network side according to its own needs.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, serve to explain the principles of the embodiments of the present disclosure.

FIG1A is a schematic diagram showing an architecture of a communication system according to an exemplary embodiment;

FIG1B is a schematic diagram showing a downlink transmission according to an exemplary embodiment;

FIG2 is a schematic flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG3A is a schematic flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG3B is a schematic flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG3C is a schematic flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG3D is a schematic diagram of a flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG3E is a schematic flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG4A is a schematic diagram of a flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG4B is a schematic diagram of a flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG4C is a schematic flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG4D is a time domain schematic diagram showing a downlink transmission triggering method according to an exemplary embodiment;

FIG5 is a schematic flow chart of a downlink transmission triggering method according to an exemplary embodiment;

FIG6A is a schematic diagram showing the structure of a terminal according to an exemplary embodiment;

FIG6B is a schematic diagram showing the structure of a first network device according to an exemplary embodiment;

FIG6C is a schematic diagram showing the structure of a second network device according to an exemplary embodiment;

FIG7A is a schematic diagram showing the structure of a communication device according to an exemplary embodiment;

FIG. 7B is a schematic structural diagram of a chip according to an exemplary embodiment.

DETAILED DESCRIPTION

The embodiments of the present disclosure provide a downlink transmission triggering method, a communication device, a communication system and a storage medium.

A first aspect provides a downlink transmission triggering method, which is executed by a terminal and includes:

A first transmission is sent to a first network device; the first transmission is used to trigger a second network device or the first network device to send a second transmission to the terminal.

Based on the above solution, the terminal can trigger the first network device and/or the second network device to send the second transmission through the first transmission. In this way, the terminal can request downlink transmission from the network side according to its own needs.

In some embodiments of the first aspect, the sending of the first transmission to the first network device includes at least one of the following: sending a reference signal to the first network device; sending uplink information to the first network device; the uplink information includes: physical uplink control channel (Physical Uplink Control Channel, PUCCH) information and/or physical random access channel (Physical Random Access Channel, PRACH) information.

Based on the above solution, it can be known that the first transmission sent by the terminal to the first network device is a public uplink transmission such as a reference signal, PUCCH information or PRACH information, which can facilitate each terminal in the cell to request a second transmission when needed.

In some embodiments of the first aspect, the reference signal includes: a sounding reference signal (Sounding Reference Signal, SRS).

Based on the above solution, the reference signal corresponding to the first transmission may be an SRS, which is equivalent to multiplexing the SRS to trigger the first network device and/or the second network device to send the second transmission.

In some embodiments of the first aspect, the reference signal includes: a first signal and a second signal; the second signal is used to trigger the second network device or the first network device to send the second transmission; the function of the first signal is different from that of the second signal.

Based on the above solution, the reference signal may have multiple functions, and may trigger the first network device and/or the second network device to send the second transmitted reference signal as the second signal.

In some embodiments of the first aspect, the method also includes at least one of the following: determining whether the reference signal includes the second signal according to the resource location of the reference signal; the resource location of the second signal is different from the resource location of the first signal; determining whether the reference signal includes the second signal according to the sequence of the reference signal; the sequence of the second signal is different from the sequence of the first signal; determining whether the reference signal includes the second signal according to the function of the reference signal; the function of the second signal is different from the function of the first signal; determining whether the reference signal includes the second signal according to the information unit (Inforamation Element, IE) IE configuring the reference signal; the IE configuring the second signal is different from the IE configuring the first signal.

Based on the above solution, the first signal and the second signal can be distinguished according to resource location, sequence, function configuration and/or configuration IE, which has the characteristic of simple implementation.

In some embodiments of the first aspect, the method further includes: determining transmission parameters of the first transmission; the transmission parameters include: a signal corresponding to the first transmission and/or a resource location of the first transmission.

In some embodiments of the first aspect, determining the transmission parameters of the first transmission includes at least one of the following: determining the transmission parameters according to configuration information sent by the first network device or the second network device; determining the transmission parameters according to a predefined method.

Based on the above scheme, there are multiple ways to determine the transmission parameters of the first transmission. They can be determined directly based on predefinition, thereby reducing the signaling interaction between the network device and the terminal, or they can be determined based on configuration information. In this way, the network side can configure the transmission parameters suitable for the current scenario as needed.

In some embodiments of the first aspect, the reference signal corresponding to the first transmission may be a reference signal determined based on an SRS mechanism.

In some embodiments of the first aspect, the transmission resource of the SRS is determined based on the configuration information of the SRS sequence and/or the corresponding transmission resource.

In some embodiments of the first aspect, for a terminal in an idle state and/or an inactive state, the configuration information is public configuration information.

In some embodiments of the first aspect, a transmission resource and a sequence of a reference signal for the first transmission are determined according to the common configuration information.

In some embodiments of the first aspect, the first transmission is sent according to an on-demand mechanism based on the configuration information.

In some embodiments of the first aspect, for a terminal in an idle state and/or an inactive state, the terminal may determine a transmission parameter of the first transmission based on a predefined method. Exemplarily, the transmission parameter includes: a transmission resource and/or a sequence. In some embodiments of the first aspect, the predefined method may be based on a predefined method of SRS configuration in a related art.

In some embodiments of the first aspect, the first network device corresponds to a first cell; the second network device corresponds to a second cell; the method further includes at least one of the following: receiving the configuration information from the first cell, the configuration information being used for the terminal to send the first transmission to the first cell; receiving the configuration information from the second cell, the configuration information being used for the terminal to send the first transmission to the first cell.

Based on the above solution, the configuration information used by the terminal to send the first transmission to the first cell may come from the first cell itself or from other cells, so that the network side can flexibly coordinate each cell to send configuration information as needed.

In some embodiments of the first aspect, the configuration information sent by the first network device or the second network device includes at least one of the following: receiving dedicated signaling sent by the first network device or the second network device, the dedicated signaling including the configuration information; receiving public signaling sent by the first network device or the second network device, the public signaling including the configuration information; receiving broadcast signaling sent by the first network device or the second network device, the broadcast signaling including the configuration information.

Based on the above solution, the configuration information can be carried in dedicated signaling, public signaling or broadcast signaling, so that the network side can flexibly use various signaling to send the configuration information as needed.

In some embodiments of the first aspect, the transmission parameter indicates at least one of the following: time domain position information, used to determine the time domain position of the first transmission; sequence information, indicating the sequence used by the first transmission; port information, indicating the sending port of the first transmission; cyclic shift information, indicating the cyclic shift value of the sequence used by the first transmission; frequency domain position information, used to determine the frequency domain position of the first transmission; format information, used to indicate the format of the first transmission.

In some embodiments of the first aspect, the time domain position information includes at least one of the following: starting time domain position information, indicating the starting time domain position of the first transmission; time slot information, indicating the time slot in which the first transmission is located; duration information, indicating the duration of one first transmission; and period information, indicating the period of the first transmission.

In some embodiments of the first aspect, the frequency domain position information includes at least one of the following: resource block RB information, indicating the number of RBs occupied by the first transmission; comb information, indicating the number of combs when the first transmission uses comb resources; resource unit RE information, indicating the number of REs occupied by the first transmission and/or RE offset.

In some embodiments of the first aspect, determining the transmission parameters of the first transmission also includes: determining the sequence of the first transmission based on at least one of a port of the first transmission, a comb number when the first transmission uses comb resources, and a cyclic shift CS of a sequence used by the first transmission.

In some embodiments of the first aspect, the method further includes: receiving the second transmission within a first time window after sending the first transmission.

Based on the above solution, the second transmission is received in the first time window after the first transmission is sent, so that the terminal does not wait for the first transmission on the network side without a time range.

In some embodiments of the first aspect, the method further includes: determining the first time window according to a predefined method; or determining the time window according to network signaling.

In some embodiments of the first aspect, the method further includes: if the second transmission is not received within the first time window, continuing to send the first transmission to the first network device.

Based on the above scheme, if the second transmission is not received within the first time window and the requested second transmission is important, the terminal may continue to send the first transmission to the first network device to trigger the first network device and/or the second network device to send the second transmission.

In some embodiments of the first aspect, the second transmission includes at least one of the following: a system information block SIB; a downlink reference signal; and downlink channel information.

In some embodiments of the first aspect, the downlink reference signal includes at least one of: Synchronization Signals and (Physical Broadcast Channel, PBCH) block, SSB; Primary Synchronization Signals (PSS); Secondary Synchronization Signals (SSS); Tracking Reference Signal (TRS); Channel State Information-Reference Signal (CSI-RS); Discovery Reference Signal (DRS).

In some embodiments of the first aspect, the downlink channel information includes at least one of the following: PDCCH information;

PDSCH information.

A second aspect provides a downlink transmission triggering method, wherein the method is performed by a first network device, and the method includes:

A first transmission sent by a receiving terminal; the first transmission is used to trigger a second network device or the first network device to send a second transmission.

In some embodiments of the second aspect, the receiving terminal sends a first transmission; the first transmission includes at least one of the following:

receiving a reference signal sent by the terminal; the reference signal includes a first type of signal and/or a reference signal;

Receive uplink information sent by the terminal; the uplink information includes: physical uplink control channel PUCCH information and/or physical random access channel (Physical Random Access Channel, PRACH) information.

In some embodiments of the second aspect, the reference signal includes: SRS.

In some embodiments of the second aspect, the reference signal includes: a first signal and a second signal; the second signal is used to trigger the second network device or the first network device to send the second transmission; the function of the first signal is different from that of the second signal.

In some embodiments of the second aspect, the resource location of the second signal is different from the resource location of the first signal; and/or, the sequence of the second signal is different from the sequence of the first signal; and/or, the function of the second signal is different from the function of the first signal; and/or, the information unit IE configuring the second signal is different from the IE configuring the first signal.

In some embodiments of the second aspect, the method further includes: determining transmission parameters of the first transmission; the transmission parameters include: a signal corresponding to the first transmission and/or a resource location of the first transmission.

In some embodiments of the second aspect, determining the transmission parameters of the first transmission includes at least one of the following: determining the transmission parameters according to configuration information sent by the first network device or the second network device; determining the transmission parameters according to a predefined method.

In some embodiments of the second aspect, the first network device corresponds to a first cell; the second network device corresponds to a second cell; the first cell is used to send the configuration information; the configuration information is used by the terminal to send the first transmission to the first cell; or, the second cell is used to send the configuration information; the configuration information is used by the terminal to send the first transmission to the first cell.

In some embodiments of the second aspect, the configuration information is carried in proprietary signaling; or, the configuration information is carried in public signaling; or,

The configuration information is carried in the broadcast signaling.

In some embodiments of the second aspect, the transmission parameter indicates at least one of the following: time domain position information, used to determine the time domain position of the first transmission; sequence information, indicating the sequence used by the first transmission; port information, indicating the sending port of the first transmission; cyclic shift information, indicating the cyclic shift value of the sequence used by the first transmission; frequency domain position information, used to determine the frequency domain position of the first transmission; format information, used to indicate the format of the first transmission.

In some embodiments of the second aspect, the time domain position information includes at least one of the following: starting time domain position information indicating a starting time domain position of the first transmission;

The time slot information indicates the time slot in which the first transmission is located; the duration information indicates the duration of the first transmission once; and the period information indicates the period of the first transmission.

In some embodiments of the second aspect, the frequency domain position information includes at least one of the following: resource block RB information, indicating the number of RBs occupied by the first transmission; comb information, indicating the number of combs when the first transmission uses comb resources; resource unit RE information, indicating the number of REs occupied by the first transmission.

In some embodiments of the second aspect, determining the transmission parameters of the first transmission includes: determining a sequence of the first transmission according to a port of the first transmission and a comb number when the first transmission uses comb resources.

In some embodiments of the second aspect, the method further includes: after receiving the first transmission, sending the second transmission within a first time window; or, after receiving the first transmission, sending the first transmission to the second network device within the first time window.

In some embodiments of the second aspect, the method further includes: determining the first time window according to a predefined method; or determining the time window according to network signaling.

In some embodiments of the second aspect, the second transmission includes at least one of the following: a system information block SIB; a downlink reference signal; and downlink channel information.

In some embodiments of the second aspect, the downlink reference signal includes at least one of the following: a synchronization signal broadcast block SSB; a primary synchronization signal PSS; a secondary synchronization signal SSS; a tracking reference signal TRS; a channel state information reference signal CSI-RS; and a discovery reference signal.

In some embodiments of the second aspect, the downlink channel information includes at least one of the following:

Physical downlink control channel PDCCH information; physical downlink shared channel PDSCH information.

A third aspect provides a downlink transmission triggering method, wherein the method is performed by a second network device, and the method includes:

A first transmission from a terminal is received from a first network device; the first transmission is used to trigger a second network device to send a second transmission to the terminal.

In some embodiments of the second aspect, the method further comprises: sending configuration information to the terminal; the configuration information is used by the terminal to determine a transmission parameter of the first transmission. A fourth aspect provides a terminal, comprising: a sending module configured to send a first transmission to a first network device; the first transmission is used to trigger a second network device or the first network device to send a second transmission to the terminal.

A fifth aspect provides a first network device, which includes: a receiving module configured to receive a first transmission sent by a terminal; the first transmission is used to trigger a second network device or the first network device to send a second transmission.

A sixth aspect provides a second network device, which includes: a receiving module configured to receive a first transmission from a terminal from a first network device; the first transmission is used to trigger the second network device to send a second transmission to the terminal.

In a seventh aspect, an embodiment of the present disclosure provides a communication device, the communication device including: one or more processors;

The processor is used to call instructions to enable the communication device to execute the method described in the optional implementation manner of the first to third aspects.

In an eighth aspect, an embodiment of the present disclosure provides a storage medium, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the method described in the optional implementation manner of the first aspect to the second aspect.

In a ninth aspect, an embodiment of the present disclosure provides a program product. When the program product is executed by a communication device, the communication device executes the downlink transmission triggering method described in the optional implementation methods of the first to third aspects.

In a tenth aspect, an embodiment of the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in the optional implementation manner of the first to third aspects.

It is understandable that the above-mentioned terminals, network devices, communication systems, program products, and computer programs are all used to execute the methods provided by the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods, which will not be repeated here.

The embodiments of the present disclosure propose a downlink transmission triggering method, communication equipment, communication system and storage medium. The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, in a certain embodiment, a solution after removing some steps can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and/or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

In the embodiments of the present disclosure, “plurality” refers to two or more.

In some embodiments, terms such as "at least one of", "one or more", "a plurality of", "multiple" and the like can be used interchangeably.

In some embodiments, "at least one of A and B", "A and/or B", "A in one case, B in another case", "A in one case, B in another case", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not limit the position, order, priority, quantity or content of the description objects. The description of the description object can be found in the claims or the description in the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the description object is a "field", the ordinal number before the "field" in "first field" and "second field" does not limit the position or order between the "fields", and "first" and "second" do not limit the modified Whether the "fields" are in the same message does not limit the order of the "first field" and the "second field". For another example, if the description object is "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by ordinal numbers and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", the "first type of information" and the "second type of information" can be the same information or different information, and their contents can be the same or different.

In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “at the time of…”, “when…”, “if…”, “if…”, etc. can be used interchangeably.

In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

In some embodiments, "network" may be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

In some embodiments, the terms "access network device (AN device), "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", "node", "access point (access point)", "transmission point (TP)", "reception point (RP)", "transmission/reception point (TRP)", "panel", "antenna panel (antenna panel)", "antenna array (antenna array)", "cell", "macro cell", "small cell (small cell)", "femto cell (femto cell)", "pico cell (pico cell)", "sector (sector)", "cell group (cell)", "serving cell", "carrier (carrier)", "component carrier (component carrier)", "bandwidth part (bandwidth part (BWP))" and so on can be used interchangeably.

In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client and the like can be used interchangeably.

In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the access network device, the core network device, or the network device and the communication between the terminals is replaced by the communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may also be configured to have a structure that has all or part of the functions of the terminal.

In some embodiments, acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

In some embodiments, data, information, etc. may be obtained with the user's consent.

In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.

FIG1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

As shown in Fig. 1A, a communication system 100 includes a terminal 101 and a network device 102. The network device 102 may include an access network device and/or a core network device.

In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an IoT device, a The present invention relates to at least one of a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and a wireless terminal device in a smart home, but is not limited thereto.

In some embodiments, the terminal is also referred to as user equipment (UE).

In some embodiments, the access network device may be, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between access network devices or within access network devices involved in the embodiments of the present disclosure may become internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

In some embodiments, the access network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit). The CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.

In some embodiments, the core network device may be a device including a first network element, etc., or may be a plurality of devices or a group of devices, each including a first network element. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. A person skilled in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A, or part of the subject, but are not limited thereto. The subjects shown in FIG1A are examples, and the communication system may include all or part of the subjects in FIG1A, or may include other subjects other than FIG1A, and the number and form of the subjects are arbitrary, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, which may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the fourth generation mobile communication system (4G), the fifth generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX). , Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark)), Public Land Mobile Network (PLMN) network, Device to Device (D2D) system, Machine to Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle to-Everything (V2X), system using other downlink transmission triggering methods, next generation systems based on them, and so on. In addition, a plurality of systems may also be combined (for example, a combination of LTE and NR), such as a 6G system.

As shown in FIG2 , an embodiment of the present disclosure provides a downlink transmission triggering method, which is executed by the communication system shown in FIG1A . The method may include:

S2101: The network device sends configuration information to the terminal.

In some embodiments, the network device may be an access network device.

In some embodiments, the network device sending the configuration information may be the first network device and/or the second network device.

The second network device is different from the first network device. Exemplarily, the first network device and the second network device may be two access network devices arranged adjacent to each other.

In some embodiments, the network device broadcasts, multicasts, or broadcasts the configuration information to the terminals.

In some embodiments, the network device sends dedicated signaling carrying configuration information to the terminal. Exemplarily, the dedicated signaling may include but is not limited to cell-specific signaling and/or user equipment dedicated radio resource control (UE-dedicated RRC) signaling.

In some embodiments, the network device sends common signaling carrying configuration information to the terminal.

In some embodiments, the network device sends a broadcast signaling carrying configuration information to the terminal. The broadcast signaling may include but is not limited to a system information block, which may include but is not limited to a master information block (MIB) and/or SIB1, etc.

In some embodiments, the configuration information may be carried in an IE sent by one or more network devices. For example, the IE may be ServingCellConfig, PDCCH-ServingCellConfig, or PDSCH-ServingCellConfig. For another example, the IE is used to configure the serving cell, or the IE is sent by the serving cell.

In some embodiments, the configuration information may be used to configure the transmission of the first transmission. Here, the first transmission may be an uplink transmission of the terminal, or the first transmission may be a public uplink transmission.

The public uplink transmission may include: various uplink public signals and/or public uplink channel information.

In some embodiments, the configuration information can be used to configure the transmission of the first transmission, which may mean that the configuration information can be used to configure the transmission type of the first transmission, the resource location of the first transmission, the sending method of the first transmission, etc.

For example, the transmission type of the first transmission may include: a reference signal and/or uplink channel information. The reference signal may include: a reference signal of a physical layer and/or a reference signal of a higher layer.

The uplink channel information may include but is not limited to: PUCCH information and/or PRACH information.

In some embodiments, the configuration information may also be used to configure a sending method of the first transmission.

The sending mode of the first transmission may include but is not limited to at least one of the following: continuous sending; repeated sending; multiple sending at intervals based on a time window, etc. Of course, the above are only examples, and the specific implementation is not limited to the above examples.

In some embodiments, the first cell sends configuration information, where the configuration information is used by the terminal to send a first transmission to the first cell.

In some embodiments, the first cell sends configuration information, where the configuration information is used by the terminal to send the first transmission to the second cell.

In some embodiments, the terminal may be a terminal supporting dual connectivity and/or carrier aggregation, and the cell of the terminal may include: a primary cell and a secondary cell.

Exemplarily, the base station of the primary cell sends configuration information to the terminal, and the configuration information can be used by the terminal to send the first transmission to the primary cell and/or the secondary cell.

As another example, the base station of the secondary cell sends configuration information to the terminal, and the configuration information can be used by the terminal to send the first transmission to the primary cell and/or the secondary cell.

In some embodiments, the first transmission is used to trigger the first network device and/or the second network device to send the second transmission. Exemplarily, after the first network device receives the first transmission, the first network device itself can send the second transmission to the terminal. If the first transmission indicates that the terminal also requests the second network device to send the second transmission, the first network device sends the first transmission to the second network device, and after the second network device receives the first transmission forwarded or transparently transmitted by the first network device, it can send the second transmission to the terminal.

In some embodiments, the term "trigger" may be understood as "request."

In some embodiments, the second transmission may be a semi-statically configured and/or periodically configured downlink transmission.

In some embodiments, the second transmission may be a downlink transmission that the network device originally sends periodically.

In some embodiments, the first network device is a network device that receives the first transmission.

In some embodiments, the second network device may be different from the first network device. For example, the first network device may be a base station of a primary cell of the terminal, and the second network device may be a base station of a secondary cell of the terminal.

In some embodiments, the configuration information may be used to determine transmission parameters for the first transmission.

In some embodiments, the transmission parameters may include but are not limited to at least one of the following:

Time domain position information, used to determine the time domain position of the first transmission;

sequence information indicating a sequence used by the first transmission;

Port information, indicating a sending port for the first transmission;

Cyclic shift information indicating a cyclic shift value of a sequence used for the first transmission;

Frequency domain position information, used to determine the frequency domain position of the first transmission;

The format information is used to indicate the format of the first transmission.

In some embodiments, the frequency domain position can be used to determine the frequency band, carrier, subcarrier, resource block (Resource Block, RB), resource element (Resource Element, RE), etc. used by the terminal to send the first transmission.

Specifically, the frequency domain location information includes at least one of the following:

Resource block RB information, indicating the number of RBs occupied by the first transmission;

Comb information indicating a comb pattern, a number of comb patterns and/or a comb offset used by the first transmission;

Resource unit RE information indicates the number of REs and/or RE offset occupied by the first transmission.

The RE offset here can be used to determine the position of the first RE used to send the first transmission on an RB. In some embodiments, the time domain position can be used to determine the radio frame, time slot, mini-time slot or symbol used by the terminal to send the first transmission.

Specifically, the time domain location information includes at least one of the following:

Starting time domain position information, indicating the starting time domain position of the first transmission;

timeslot information, indicating a timeslot in which the first transmission occurs;

Duration information, indicating the duration of the first transmission once;

The period information indicates the period of the first transmission.

In some embodiments, the transmission parameters may also include:

The window information may indicate a first time window for the terminal to receive a second transmission after sending the first transmission in the first time window.

For example, the window information indicates the duration of the first time window. The starting time of the first time window may be the sending time of the first transmission or a specified time after the sending time of the first transmission. For example, there is a specified time length between the specified time and the sending time, so that the network device and the terminal unify the starting time of the first time window.

In some embodiments, the terminal may have one or more ports, and the port information may indicate the port through which the terminal sends the first transmission. The port information may include, but is not limited to, information such as a port number.

In some embodiments, if the first transmission is uplink information, the format of the first transmission may be indicated by format information. For example, if the uplink information is physical uplink control channel (PUCCH) information, the format may indicate the format used by the PUCCH information. Exemplarily, the format information may indicate the use of format 1 or format 2, etc.

In some embodiments, the transmission parameter may further include: a coding mode of the first transmission, etc. For example, the coding mode may indicate a coding format of uplink information, thereby achieving consistent understanding of coding and decoding information between the terminal and the network device.

In some embodiments, the configuration information of the first transmission can also be used to configure a mapping relationship between the first transmission and the second transmission. Based on the mapping relationship, the terminal sends the corresponding first transmission to the first network device according to the second transmission requested by the terminal.

For example, the mapping relationship may include but is not limited to at least one of the following:

a mapping relationship between a beam used for the first transmission and one or more of a type, a transmission density, a transmission number, and a transmission beam for the second transmission;

A mapping relationship between a sequence corresponding to a first transmission and one or more of a type, a transmission density, a number of transmissions, and a transmission beam of a second transmission.

In some embodiments, the reference signal may include a first type of signal and a second type of signal.

The first type of signal may be a signal dedicated to triggering the first network device and/or the second network device to send the second transmission. Exemplarily, the first type of signal may have a function, which is to trigger the first network device and/or the second network device to send the second transmission.

The second type of signal may be a signal with multiple functions. The function of triggering the first network device and/or the second network device to send the second transmission is one of the functions of the second type of signal. In some embodiments, the multiple functions of the second type of signal may also include functions defined in related technologies.

Exemplarily, the second type of signal may include but is not limited to a sounding reference signal. The sounding reference signal (SRS) originally has the function of estimating the uplink channel quality. In the embodiment of the present disclosure, the SRS may be multiplexed to trigger the first network device and/or the second network device to send a second transmission signal. That is, in the embodiment of the present disclosure, the SRS is added with the function of triggering the first network device and/or the second network device to send a second transmission.

In some embodiments, the second type of signal includes: a first signal and a second signal.

In some embodiments, the second signal is used to trigger the second network device or the first network device to send the second transmission; and the function of the first signal is different from the function of the second signal.

For example, taking the second type of signal as SRS as an example, the SRS may be a first SRS and a second SRS. The first SRS may be used for uplink channel estimation, and the second SRS may be used to trigger the second network device or the first network device to send the second transmission.

It is worth noting that: in the embodiment of the present disclosure, the reference signal configured by the configuration information can be used for idle terminals, connected terminals, The terminal and/or the inactive terminal requests the second transmission from the network side.

In some embodiments, the resource location of the second signal is different from the resource location of the first signal; and/or,

The sequence of the second signal is different from the sequence of the first signal; and/or,

The function of the second signal is different from the function of the first signal; and/or,

The IE configuring the second signal is different from the IE configuring the first signal.

Through the above distinction, the network device can distinguish the first signal from the second signal, and can independently configure the first signal and the second signal. When receiving the configuration information, the terminal can also distinguish whether the current configuration information is for the first signal or the second signal.

The IE for configuring the second signal and the IE for configuring the first signal may be included in the same network message or in different network messages. The network message may include any message sent by a network device, such as a system information block, a radio resource control RRC message, or a control element (CE) of a media access control MAC. In this way, when the terminal receives the configuration information, it can know whether the currently configured reference signal is the first signal or the second signal based on the IE.

Of course, the above are merely examples of the first type of signal and/or the second type of signal, and the specific implementation is not limited to the above examples.

In some embodiments, the uplink information may include: PUCCH information and/or PRACH information.

The PUCCH information may include any information sent on the PUCCH. Exemplarily, the PUSCH information may be common PUCCH information.

The PRACH information may include any information sent on the PRACH, including but not limited to message 1 of the four-step random access and/or message A of the two-step random access. Exemplarily, the PRACH may be a contention-based PRACH.

In some embodiments, the uplink information may also include: Physical Uplink Shared Channel (PUSCH) information. The PUSCH information may be any information transmitted on the PUSCH channel.

In some embodiments, the second transmission includes at least one of the following:

System Information Block SIB;

Downlink reference signal;

Downlink channel information.

Exemplarily, the SIB may include SIB1. Exemplarily, the SIB may include SIB1, SIB2 and/or SIB12, etc.

In some embodiments, the downlink reference signal may be various cell-level signals or terminal-level signals.

In some embodiments, the downlink reference signal may be used by the terminal to discover the cell that sends the signal and/or to establish downlink synchronization with the cell.

In some embodiments, the downlink channel information may be information sent on any downlink channel, for example, a physical downlink control channel (PDCCH), a physical downlink shared channel, etc.

In some embodiments, the downlink reference signal includes at least one of the following:

Synchronous signal broadcast block SSB;

Primary synchronization signal PSS;

Secondary synchronization signal SSS;

Tracking reference signal TRS;

Channel state information reference signal CSI-RS;

Discover the reference signal DRS.

In some embodiments, the downlink reference signal may also include a demodulation reference signal and the like.

In some embodiments, the sequence of the first transmission is determined based on at least one of a port of the first transmission, a comb number corresponding to the first transmission, and a cyclic shift (CS) of a sequence used by the first transmission.

For example, when the configuration information of the first transmission does not carry sequence information, the sequence of the first transmission can be determined according to other parameters in the configuration information, thereby reducing the sequence information carried in the configuration information and reducing signaling overhead.

In some embodiments, when the sequence of the first transmission is not determined by a predefined method such as a protocol, the sequence of the first transmission may also be determined according to other parameters agreed in the protocol, thereby reducing the sequence information carried in the configuration information. Exemplarily, the other parameters may include, but are not limited to, at least one of the parameters such as the port of the first transmission, the number of combs when the first transmission uses comb resources, and the cyclic shift of the sequence used by the first transmission.

For example, if the number of ports for sending the first transmission is equal to 1, the sequence corresponding to the port number 1 is used as the sequence of the first transmission.

For another example, different sequences have different CSs, and the sequence of the first transmission may be determined according to the determined CS. For example, the CS corresponding to the first transmission may be equal to 0.

For example, if a certain SRS sequence corresponds to a comb resource (Comb) number, such as a first transmission corresponding to a Comb number, then the first transmission can be used to The determined Comb number determines a sequence of the SRS for requesting the second transmission.

The maximum number of CSs in the Comb number field is determined based on the following table:

Where K _TC is CS The maximum value of .

It is worth noting that S2101 may be an optional step. For example, the terminal and the network device may determine the transmission parameters of the first transmission based on a predefined method. In this case, the step of the network device sending the configuration information may be omitted.

S2102: The terminal sends a first transmission to the network device.

In some embodiments, the terminal may include a first type of terminal and a second type of terminal. The first type of terminal may be a terminal that supports the network NES mechanism. The second type of terminal may be a terminal that does not support the NES mechanism. Exemplarily, the second type of terminal may be an existing (legacy) terminal.

In some embodiments, a first type of terminal sends a first transmission to a network device.

In some embodiments, the terminal sends a first transmission to a first network device.

In some embodiments, the terminal sends the first transmission to the first network device when there is a demand to obtain the second transmission.

In some embodiments, the first network device may be a base station of the first cell, etc.

In some embodiments, the first cell may be a serving cell or a cell currently camped on by the terminal.

In some embodiments, the terminal is currently in a connected state, and the first cell may be a cell to which the terminal is currently connected.

In some embodiments, the terminal is currently in an idle state or an inactive state, and the first cell may be a cell in which the terminal is currently stationed.

In some embodiments, when the terminal needs to obtain a second transmission of a network device currently in a network energy-saving state, the terminal sends a first transmission to the first network device. The network device currently in the network energy-saving state may be the first network device or the second network device. The network energy-saving state may include, but is not limited to: a dormant state of the network device, a cell discontinuous transmission of the network device, a discontinuous reception of the network device, and the like.

In some embodiments, the terminal sends the first transmission to the first network device based on the configuration information.

In some embodiments, the terminal sends the first transmission to the first network device according to a predefined method.

In some embodiments, the terminal determines transmission parameters of the first transmission according to configuration information or pre-definition; and sends the first transmission to the first network device according to the determined transmission parameters.

In some embodiments, the predefined includes at least a protocol agreement.

In some embodiments, the terminal sends a reference signal to the first network device.

In some implementations, the reference signal includes a first type of signal and/or a second type of signal.

The first type of signal has a first function, and the first function is to trigger the second network device or the first network device to send the second transmission.

The second type of signal has a first function and a second function. The first function is a function of triggering the second network device or the first network device to send the second transmission. The second function is different from the first function. Exemplarily, assuming that the second type of reference signal is an SRS, the second function may be an uplink channel detection function of the SRS.

In some other embodiments, the terminal sends uplink information to the first network device; the uplink information includes: physical uplink control channel PUCCH information and/or physical random access channel PRACH information.

In some embodiments, the first transmission may be used to send SSBs and/or SIBs to an SSB-less or SIBless cell.

In some embodiments, the first transmission may be used to send an SSB and/or a SIB to a cell performing cell discontinuous transmission or dormancy.

In some embodiments, the transmission parameters and/or carried information of the first transmission may be used by the network device to determine the transmission parameters of the downlink transmission requested to be sent.

In some embodiments, the transmission parameters of the first transmission include a sequence corresponding to the first transmission and/or a beam used by the first transmission.

In some embodiments, the sending parameter of the downlink transmission may be the sending density of the downlink transmission and/or the index of the sent downlink transmission.

As shown in FIG4D , assuming that the first transmission is SRS, different sequences of SRS may correspond to different densities of downlink transmission. For example, when the first network device and/or the second network device do not receive the first transmission (i.e., WUS in FIG4D ), the SSB is turned off. The SSB turned off here means not sending the SSB. After receiving the SRS of sequence 1 and/or sequence 2, the network device sends 2 SSBs in one cycle. After receiving the SRS of sequence 3, the network device sends 4 SSBs in one cycle. For example, as shown in FIG4D , the SRS of sequence 1 and sequence 2 can be used to trigger the network device to send SSBs of different indexes.

In some embodiments, the terminal sends the first transmission using different beams, which may correspond to the first network device and/or the second network device. The device requests a different downstream transmission.

S2103: The network device sends a second transmission to the terminal.

In some embodiments, the second transmission may be a common downlink transmission.

In some embodiments, the public downlink transmission may include: a cell-level downlink signal and/or downlink channel information.

In some embodiments, the common downlink transmission may be a downlink transmission shared by multiple terminals in a cell.

Exemplarily, in some embodiments, the public downlink transmission may include but is not limited to at least one of the following:

SSB;

System Information Block (SIB), illustratively, the SIB may include but is not limited to SIB1 and/or SIBn, where n may be any positive integer greater than or equal to 2;

Physical downlink control channel (PDCCH) information and/or physical downlink shared channel (PDSCH) information. In some embodiments, if the second transmission includes SIB, the second transmission may include at least SIB1. Usually SIB1 can be used to configure the transmission of other SIBs, so SIB1 is more important for the terminal.

In some embodiments, the network device that sends the second transmission may be a network device that is currently in a dormant state.

In some embodiments, the network device that sends the second transmission may be a network device that is currently executing the NES mechanism.

In some embodiments, the network device sending the second transmission may be a network device currently executing a network energy saving (NES) mechanism. Exemplarily, the network energy saving mechanism may include but is not limited to: discontinuous transmission of a cell, discontinuous reception of a cell, intermittent activation of a cell, etc.

Of course, in some other embodiments, the network device may also be a network device in a working state, that is, the network device is neither in sleep mode nor executing the NES mechanism.

In some embodiments, the network device that sends the second transmission may be a network device that sends downlink transmissions based on an on-demand mode.

In some embodiments, the first network device sends the second transmission to the terminal.

In some embodiments, the second network device sends the second transmission to the terminal.

In some embodiments, the network device sends a second transmission to the terminal after receiving the first transmission.

In some embodiments, the first network device sends a second transmission to the terminal after receiving the first transmission sent by the terminal.

In some embodiments, after receiving the first transmission from the terminal that is forwarded or transparently transmitted by the first network device, the second network device sends a second transmission to the terminal.

In some embodiments, if the network device sending the second transmission is the second network device, after receiving the first transmission, the first network device sends the first transmission to the second network device within the first time window of the second transmission, thereby triggering the second network device to send the second transmission.

In some embodiments, after receiving the first transmission, the network device may determine whether to send the second transmission to the terminal based on the importance of the second transmission requested to be sent (which may be reflected by the function of the second transmission) and/or the current state of the network device.

When it is determined to send the second transmission to the terminal, the second transmission is sent to the terminal; otherwise, the second transmission is not sent to the terminal.

Exemplarily, the first transmission may carry identification information indicating the requested second transmission, and the network device may determine the second transmission to be transmitted based on the identification information, and comprehensively determine whether to send the second transmission based on the function of the second transmission and whether it is currently in a dormant state or the expected duration of maintaining NES execution.

As another example, when the network device receives the first transmission and switches its own state based on its own state, it determines that it will soon exit the NES mechanism of not sending or sending the second transmission on demand. The network device can exit the NES mechanism in advance to respond to the terminal's request, or the network device can wait for the originally scheduled time to exit the NES mechanism to exit the NES mechanism, and then send the second transmission according to a semi-static period or a dynamically configured period.

In some other embodiments, the network device may determine whether to send the second transmission to the terminal according to request conditions such as the number of terminals requesting the same second transmission and/or the number of requests in the cell.

In other embodiments, the network device determines to send the second transmission upon receiving the first transmission.

In some embodiments, the network device sends the second transmission to the terminal within a first time window of the second transmission after receiving the first transmission.

In some embodiments, the network device broadcasts, multicasts, or unicasts the second transmission to the terminals.

S2104: The terminal continues to send the first transmission to the first network device.

In some embodiments, the terminal continues to send the first transmission to the first network device.

In some embodiments, the terminal receives the second transmission within a first time window after a previous first transmission is sent, and when the second transmission is not received within the time window, the terminal continues to send the first transmission to the first network device.

In some embodiments, the first transmission may be used to repeat a request for a second transmission that has not yet been received.

In some embodiments, when the terminal receives a second transmission within a first time window after a previous first transmission is sent but fails to receive the second transmission or fails to decode the second transmission, the terminal continues to send the first transmission to the first network device.

In some embodiments, the first time window may be determined by predefinition, for example, the first time window may be agreed upon by a protocol. In another example, the first time window may be a default window known by both the terminal and the network device.

In some embodiments, the first time window may be configured by the network device, for example, it may be defined by one or more of the aforementioned configuration information.

In some other embodiments, the first time window may also be indicated by network signaling other than the aforementioned configuration information. The network signaling may include physical layer signaling and/or high-layer signaling. The physical layer signaling may include but is not limited to downlink control information. The high-layer signaling may include but is not limited to RRC signaling.

The first transmission that the terminal continues to send is still used to trigger the first network device and/or the second network device to send the second transmission.

In some embodiments, if the terminal has not received all of the second transmissions, the first transmissions that continue to be sent may be used to request the remaining second transmissions that have not been received.

In some embodiments, the terminal may also request a new second transmission by resending the first transmission.

It is worth noting that: S2101, S2103 and S2104 can all be optional steps. For example, if the transmission parameters of the first transmission are determined in a predefined manner, the network device does not need to send configuration information to the terminal, and S2101 can be omitted. For another example, after receiving the first transmission, the network device can determine not to send the second transmission based on the actual network situation, and continue to maintain the low power consumption state of the network device to achieve better energy saving effect of the network, and S2103 can be omitted. In some embodiments, if the network device is not configured with a first time window or the first time window is not predefined, then when the terminal does not receive the second transmission within the first time window after sending the first transmission, it may no longer continue to send the first transmission, and may default to waiting for the network device to send the second transmission by itself, etc., so S2104 can be omitted.

As shown in FIG3A , an embodiment of the present disclosure provides a downlink transmission triggering method, which can be executed by a terminal. The method may include:

S3101: Receive configuration information.

In some embodiments, as shown in FIG3B , the terminal receives configuration information sent by the second network device.

In some embodiments, as shown in FIG3C , the terminal receives configuration information sent by the first network device.

In some embodiments, the configuration information may be used by the terminal to send the first transmission.

The information content of the configuration information can be found in the relevant description of the embodiment corresponding to FIG2 , and will not be repeated here.

In some embodiments, S3101 may be omitted, and the transmission parameters of the first transmission may be determined in a predefined manner.

It is worth noting that: S3101 can be executed independently as an embodiment, and after the terminal receives the configuration information, it does not send the first transmission.

S3102: Send the first transmission.

In some embodiments, the terminal sends a first transmission to a first network device.

In some embodiments, the terminal determines transmission parameters of the first transmission according to configuration information or predefinition, and sends the first transmission to the first network device according to the determined transmission parameters.

The first transmission is used to trigger the first network device and/or the second network device to send a second transmission.

For the relevant description of the first network device and/or the second transmission, please refer to the embodiment corresponding to FIG. 2 .

For an optional implementation of the terminal sending the first transmission, please refer to S2102 of the corresponding embodiment of FIG. 2 .

It is worth noting that S3102 can be implemented as an embodiment alone or in combination with S3101.

S3103: Receive the second transmission.

In some embodiments, the second transmission is received after the first transmission is sent.

In some embodiments, the second transmission is received within a first time window in which the first transmission was sent.

In some embodiments, the relevant description of the first time window can refer to the embodiment corresponding to FIG. 2 .

It is worth noting that S3103 can be performed as an embodiment alone, for example, when other terminals send the first transmission to the network device and the second transmission is broadcast, S3103 can be performed alone. In some implementations, S3103 can be implemented in combination with one or two of S3101 to S3102.

As shown in FIG. 3D , the terminal receives a second transmission from the first network device.

Exemplarily, if the first transmission received by the first network device carries identification information related to the second network device, the first network device may consider that the first transmission is a request for the second network device to send the second transmission. The first transmission will then be forwarded or transparently transmitted to the second network device by the first network device. In this way, the terminal will receive the second transmission sent by the second network device.

In some embodiments, the identification information related to the second network device may include, but is not limited to, at least one of the following:

A device identifier of a second network device, for example, a base station identifier;

The cell identifier of the second network device.

In some embodiments, the first network device may be a network device of a regular cell. The regular cell may be a cell that periodically sends downlink transmissions. The regular cell is associated with a cell A that does not periodically send downlink transmissions. At this time, when the first network device receives the first transmission, it defaults to requesting the downlink transmission of cell A, so the first network device forwards or transparently transmits the first transmission to the second network device. Therefore, the terminal receives the downlink transmission sent by the second network device.

It is worth noting that: the combination of S3102 and S3102 can also be implemented in combination with S3101 to S3102.

As shown in 3E, the terminal receives a second transmission from the second network device.

S3104: Continue sending the first transmission.

In some embodiments, the terminal continues to send the first transmission to the first network device.

In some embodiments, the terminal does not receive the second transmission or fails to decode the received second transmission and continues to send the first transmission.

In some embodiments, the terminal does not receive the second transmission within a first time window after sending the first transmission, and continues to send the first transmission.

Here, an optional implementation manner in which the terminal continues to send the first transmission may refer to S2104 of the corresponding embodiment of FIG. 2 .

It is worth noting that: S3104 can be implemented in combination with S3102, or S3104 can be implemented in combination with S3101 and S3102.

It is worth noting that S3101, S3103 and S3104 can all be optional steps. For example, the transmission participation of the first transmission is determined in a predefined manner, and the terminal does not need to receive configuration information from the network device. After receiving the first transmission, the network device determines that there is no second transmission, and the terminal cannot receive the second transmission. Or the terminal's need to obtain the second transmission disappears, and the terminal may not execute S3103. If the terminal no longer has the need to obtain the second transmission, the first time window is not configured or predefined, the terminal may not continue to send the first transmission. For example, after the terminal sends the first transmission a specified number of times and still does not receive the second transmission, it can be assumed that the network device will not send the second transmission. In order to avoid interference in the wireless environment, the first transmission will no longer be sent, and S3104 can be omitted. The specified number of times can be 1 or more.

As shown in FIG4A , an embodiment of the present disclosure provides a downlink transmission triggering method, which can be executed by a first network device. The method may include:

S4101: Send configuration information.

In some embodiments, the first network device broadcasts, multicasts, or unicasts the configuration information to the terminal.

In some embodiments, the information content and/or carried signaling of the configuration information may refer to the embodiment corresponding to FIG. 2 .

It is worth noting that: S4101 can be executed independently as an embodiment to configure the first transmission for the terminal, but the final terminal may not send the first transmission, and the steps of sending the second transmission are not involved.

S4102: Receive a first transmission.

In some embodiments, the receiving terminal broadcasts, multicasts, or unicasts the first transmission.

In some embodiments, the first network device receives the first transmission according to configuration information or pre-definition.

In some embodiments, the relevant description of the first transmission can refer to the embodiment corresponding to FIG. 2 .

It is worth noting that: S4102 can be executed independently as an embodiment, but the second network device determines not to send the second transmission, and the terminal does not continue to send the first transmission.

S4103: Send the second transmission.

As shown in FIG. 4B , the first network device sends a second transmission to the terminal.

In some embodiments, the first network device broadcasts, multicasts, or unicasts the second transmission to the terminals.

In some embodiments, the relevant description of the second transmission can refer to the embodiment corresponding to FIG. 2 .

It is worth noting that: S4103 can be combined with any one of S4102 and S4103 to implement the embodiment.

S4104: Send the first transmission.

In some embodiments, the first network device sends a first transmission to the second network device. As shown in Figure 4C, the first network device sends a first transmission to the second network device.

In some embodiments, if the first transmission requests the second transmission from the first network device and the second network device at the same time, the first network device forwards the first transmission to the second network device while sending the second transmission to the terminal to trigger the second network device to send the second transmission.

In some embodiments, the first network device transparently transmits or forwards the first transmission to the second network device. For example, the first network device sends the first transmission to the second network device based on the base station interface between the first network device and the second network device. For another example, the first network device sends the first transmission to the second network device based on the tunnel between the first network device and the second network device.

It is worth noting that: S4104 can be combined with S4102 as an embodiment, or it can be a combination embodiment of S4104, S4101 and S4102.

S4105: Continue receiving the first transmission.

In some embodiments, the first transmission is continued to be received after a first time window separating the second transmission from the previous first transmission.

It is worth noting that: S4105 can be a combined embodiment with S4102, or it can be a combination of S4105 and S4102 and combined with one or more of S4101, S4103 and S4104.

The first time window of the second transmission may refer to the embodiment corresponding to FIG. 2 .

In some embodiments, S4101, S4103, and S4104 to S4105 can all be optional steps. For example, if the transmission participation of the first transmission is determined in a predefined manner, the first network device does not need to send configuration information. For another example, if the configuration information is sent by the second network device, the first network device does not need to send configuration information. Therefore, S4101 can be omitted. After receiving the first transmission, the first network device determines that there is no second transmission, and S4103 can be omitted. If the first transmission is used to trigger the second network device to send the second transmission, S4103 can also be omitted. If the first transmission requests the first network device to send the second transmission, S4104 can be omitted. If the terminal no longer has the need to obtain the second transmission, the first time window is not configured or predefined, the first network device may not continue to send the first transmission, and S4105 can be omitted. For example, if the terminal still does not receive the second transmission after sending the first transmission for a specified number of times, it can be assumed that the network device will not send the second transmission. In order to avoid interference in the wireless environment, the first transmission will no longer be sent, so S4105 can be omitted. The specified number of times can be 1 or more.

As shown in FIG5 , an embodiment of the present disclosure provides a downlink transmission triggering method, which can be executed by a second network device. The method may include:

S5101: Send configuration information.

In some embodiments, the second network device broadcasts, multicasts, or unicasts the configuration information to the terminal.

In some embodiments, the information content and/or carried signaling of the configuration information may refer to the embodiment corresponding to FIG. 2 .

It is worth noting that: S5101 can be executed independently as an embodiment to configure the first transmission for the terminal.

S5102: Receive a first transmission.

In some embodiments, a first transmission is received from a first network device.

In some embodiments, a first transmission from a terminal is forwarded or transparently transmitted from a first network device.

In some embodiments, the second network device receives the first transmission according to configuration information or pre-definition.

In some embodiments, the relevant description of the first transmission can refer to the embodiment corresponding to FIG. 2 .

It is worth noting that: S5102 can be implemented as an embodiment alone, or can be implemented in combination with other steps.

S5103: Send the second transmission.

In some embodiments, the second network device broadcasts, multicasts, or unicasts the second transmission to the terminals.

In some embodiments, the relevant description of the second transmission can refer to the embodiment corresponding to FIG. 2 .

S5104: Continue receiving the first transmission.

In some embodiments, the second network device continues to receive the first transmission from the first network device, for example, continuing to receive the first transmission during a first time window of the second transmission after a previous first transmission was received.

It is worth noting that: S5104 can be implemented in combination with S5102 as an embodiment, can be implemented in combination with S5102 and S5103, and can be implemented in combination with S5101, S5102 and S5103.

In some embodiments, S5101, S5103, and S5104 to S5105 may all be optional steps. For example, if the transmission participation of the first transmission is determined in a predefined manner, the second network device does not need to send configuration information. For another example, if the configuration information is sent by the first network device, the second network device also does not need to send configuration information. Therefore, S5101 can be omitted. After receiving the first transmission, the second network device determines not to send the second transmission, then S5102 and S5103 can be omitted. If the second network device determines not to send the second transmission, then S5103 can be omitted. If the terminal no longer has the need to obtain the second transmission, and the first time window is not configured or predefined, then the second network device may not continue to receive and send the first transmission, then S5105 can be omitted.

The second transmission may include a downlink reference signal and/or downlink information. The configuration of the SSB and/or SRS in the downlink reference signal is introduced below.

The network device stops sending the corresponding SSB based on business demand conditions, etc.

The terminal cannot receive the corresponding SSB during the reception of the SSB. If the terminal expects to receive the corresponding SSB, the UE sends a corresponding wake-up signal (WUS) signal to the network device. The WUS signal may be a reference signal in the aforementioned first transmission.

The network device can choose whether to continue sending SSB based on the terminal's WUS.

If the network device determines to send SSB, the network device sends a corresponding confirmation (acknowledgement character, ACK) to confirm the transmission of SSB.

After sending WUS, the terminal starts trying to receive SSB and/or ACK. At this time, the terminal can receive the corresponding ACK and start trying to receive Receive SSB.

In some embodiments, SSB may be sent periodically or aperiodically.

The SSB pattern may be related to the sub-carrier space (SCS) and the like. The transmission period of SSB is 20ms. The specific pattern may be shown in the following table:

SSB configuration can be as follows:

First, SSB can be used for cell search.

Secondly, the terminal can obtain the SSB configuration through S1B1.

For example, the configuration information of the SSB is carried by the serving cell configuration SIB (ServingCellConfigCommonSIB) information unit of the SSB.

The ServingCellConfigCommonSIB information element may be as follows:

Note: SSB burst (ssb-PositionsInBurst) may include two fields, namely: inOneGroup field and groupPresence field. Both fields may include 8-bit bit string (BIT STRING).

When there are 64 SSB bursts in one cycle, different values of a bit in the inOneGroup field can indicate whether the SSB burst of a burst group is sent. A burst group can include 8 SSB bursts. At this time, the 8 bits of the groupPresence field respectively indicate whether each SSB burst in the burst group indicated by the inOneGroup field is sent.

When there are 16 SSB bursts in one cycle, the inOneGroup field and the groupPresence field respectively indicate whether 8 SSB bursts are sent.

The ssb-PeriodicityServingCell field indicates the SSB sending period.

3) Perform SSB configuration based on the serving cell common configuration (servingcellConfigCommon) IE.

The servingcellConfigCommon IE can be as follows:

An SSB burst contains 4, 8 or 64 SSBs. Serving cell SSB period (ssb-periodicityServingCell) The SSB sending period configured by the field.

The SSB frequency domain position can be determined as follows:

The SSB frequency domain range is determined based on the terminal searching for the SSB corresponding to the blind detection in the corresponding frequency domain range.

In some embodiments, SSB occupies 20 resource blocks (RBs) in the frequency domain.

SIB1 configuration method:

1) Method 1: Configure SIB1 based on the Master Information Block (MIB).

The physical downlink control channel configuration SIB1 (pdcch-ConfigSIB1) in the MIB is used to indicate the control resource set (CORESET) #0 and search space (SearchSpace) #0 of the DCI format0_1 (SI-RNTI) scrambled by scheduling SIB1. The default period of SIB1 can be 20ms. The terminal blindly detects the corresponding downlink control information (Downlink Control Information, DCI) to obtain the transmission indication of SIB1. When the DCI indicates the transmission of SIB1, the terminal receives the corresponding physical downlink shared channel information at the position indicated by the terminal, and parses the physical downlink shared channel information to obtain SIB1.

2) Method 2: Configure SIB1 based on the physical downlink control channel configuration common (PDCCH-configCommon) IE in the serving cell configuration function SIB (servingCellConfigCommonSIB) indicated by SIB1.

PDCCH-configCommon IE includes: search space (SS) SIB1 configuration and/or control resource set (CORESET) #0 and search space (SearchSpace) #0 configuration.

The SIB1 acquisition of the corresponding secondary cell is configured through the serving cell common (servingcellConfigCommon) IE and the dedicated SIB1 transmission (dedicatedSIB1-Delivery) IE.

SRS is configured based on the following:

ServingCellConfig->UplinkConfig->BWP-Uplink->BWP-UplinkDedicated->SRS-config.

ServingCellConfig IE includes UplinkConfig IE.

UplinkConfig IE includes BWP-Uplink IE.

BWP-Uplink IE includes BWP-UplinkDedicated IE.

BWP-UplinkDedicated IE includes SRS-config IE. The SRS-configIE is the configuration information of SRS.

The SRS usage is as follows:

Based on different SRS application scenarios, there are the following types:

{beam management, codebook, non-codebook, antenna switching}, the specific scenario is based on the functional configuration.

The frequency domain location of the SRS can be determined by RRC signaling configuration:

The RB location of the SRS can be determined as follows:

The number of RBs occupied by SRS may be determined based on c-SRS, which is configured based on high-layer signaling. The RB starting position of SRS is determined based on the frequency shift (freqDomainShift(n _shift )).

exist Under the condition that the corresponding SRS reference position is the position of subcarrier 0 of CRB#0, otherwise the SRS frequency domain starting reference position is the lowest position of the activated BWP.

SRS RE location: SRS RE starting location K _TC ∈{2,4,8} determines the comb teeth of SRS transmission. Taking K _TC =2 as an example, SRS is transmitted every 2 REs in a corresponding RB. The two parameters are determined based on a high-level parameter transmissionComb.

The time domain position of the SRS can be determined by RRC signaling configuration.

For periodic and semi-static SRS, the time slot t can be configured based on the semi-static period and offset (SRS-PeriodicityAndOffset), and the symbol starting position and symbol length of SRS in the time slot are indicated based on the start position (startPosition) field and the number of symbols (nrofSymbols) field. For AP SRS, the corresponding SRS transmission is based on DCI triggering.

SRS trigger mode:

For semi-static SRS, the corresponding SRS transmission is based on MAC CE triggering and takes SRS resource set as the granularity.

For non-periodic (i.e. dynamic) SRS, the transmission of the corresponding SRS resource set is triggered based on the SRS request trigger in DCI 0_1 or DCI 0_2.

SRS sequence:

The corresponding SRS sequence is determined based on the ZC sequence, and the sequence is related to the antenna port CSα _i is related to the transmission comb value Comb K _TC ∈{2,4,8}.

The downlink transmission processing method on the terminal side may be as follows:

The terminal supports network energy saving by sending SRS signaling to the base station to request the base station to send downlink signals and/or information, where the signals and/or information include at least SSB and/or SIB1. The terminal requests the NES base station to send downlink signals and/or channels in the following manner:

Mode 1: A terminal supporting network energy saving determines time-frequency domain resources for transmitting a reference signal and a reference signal, and sends the reference signal.

Mode 1-1: The terminal determines the time-frequency domain resources of the reference signal and the reference signal based on the configuration information, and sends the reference signal based on the configuration information.

Exemplarily, the terminal sending the reference signal SIB1/SSB based on the configuration information may include but is not limited to at least one of the following:

The terminal obtains configuration information based on cell 1, and sends a reference signal on cell 1 to request SIB1/SSB of cell 2;

The terminal obtains configuration information based on cell 1, and sends a reference signal on cell 2 to request SIB1/SSB of cell 2;

The terminal obtains configuration information based on cell 2, and sends a reference signal on cell 2 to request SIB1/SSB of cell 2. Mode 1-2: The terminal supporting network energy saving determines the time-frequency domain resources and reference signal of the reference signal based on a predefined method.

Method 1-3: After sending the reference signal, the terminal attempts to receive SIB1/SSB within the first time window based on the following method.

Method 1-3-1: The first time window is determined based on signaling indication or a predefined method.

Method 1-3-2: When the terminal does not receive the corresponding SIB1/SSB in the first time window, it continues to send the reference signal.

Mode 2: The terminal distinguishes the reference signal used for SIB1/SSB request information based on the following method and transmits the corresponding reference signal. The following example takes the reference signal as SRS, but the actual reference signal is not limited to SRS.

Method 2-1: The terminal determines the SRS for SIB1/SSB request information based on the time-frequency domain position of the SRS.

Method 2-2: The terminal determines the SRS for SIB1/SSB request information based on the SRS corresponding sequence.

Method 2-3: The terminal determines the SRS used for SIB1/SSB request information based on the function (usage) corresponding to the SRS.

Method 2-4: After the terminal distinguishes the SRS used for SIB1/SSB request information, it sends the SRS and attempts to receive SIB1/SSB within the first time window based on the following method.

Methods 2-4 may also include at least one of the following:

Method 2-4-1: The first time window is determined based on signaling instructions or a predefined method.

Method 2-4-2: The terminal continues to send SRS when it does not receive the corresponding SIB1/SSB in the first time window.

Mode 3: The terminal determines the SRS configuration information and SRS sequence based on the following parameters.

Method 3-1: Time-frequency domain resources corresponding to SRS transmission.

The resource is determined based on one or more of the following parameters:

Starting resource unit, number of occupied RBs, corresponding Comb number, SRS symbol length, SRS symbol starting position, SRS transmission time slot and/or SRS period.

Mode 3-2: SRS sequence corresponding parameters: SRS corresponding port, cyclic shift, corresponding Comb number.

Method 3-3: Function (usage) corresponding to the SRS sequence.

Method 3-4: SRS configuration information attributes.

Method 3-4-1: SRS can be configured based on dedicated signaling.

Mode 3-4-2: SRS can be configured based on common signaling: For example, common signaling may include but is not limited to: partial bandwidth common uplink (BWPUplinkCommon) configured by SIB1 or servingCellConfigCommon.

Method 3-4-3: SRS can be configured based on system broadcast signaling, exemplarily based on SIB 1 configuration of SSB.

Method 3-5: After sending the SRS, the terminal attempts to receive SIB1/SSB within the first time window based on the following method.

Method 3-5-1: The first time window is determined based on signaling instructions or a predefined method.

Method 3-5-2: The terminal continues to send SRS if it does not receive the corresponding SIB1/SSB in the first time window.

The downlink transmission processing method on the base station side may be as follows:

A base station supporting network energy saving receives SSB and/or SRS signaling of SIB1 requested by a terminal, and determines whether to send a downlink signal and/or information according to the request.

Mode 1: The base station determines the time-frequency domain resources for transmitting the reference signal and the reference signal, and receives the reference signal according to the information.

Mode 1-1: The base station determines the time-frequency domain resources for transmitting the reference signal and the reference signal, and sends an indication signaling.

The specific method is similar to the terminal side method and will not be repeated here;

Mode 1-2: The base station determines the time-frequency domain resources and the reference signal of the reference signal based on a predefined method.

Method 2: The base station distinguishes the SRS used for SIB1/SSB request information based on the following method.

Method 2-1: The base station determines the SRS for SIB1/SSB request information based on the time-frequency domain position of the SRS.

Method 2-2: The base station determines the SRS for SIB1/SSB request information based on the SRS corresponding sequence.

Mode 2-3: The base station determines the SRS for SIB1/SSB request information based on the function (usage) corresponding to the SRS;

Solution 3: The network side determines the SRS configuration information and SRS sequence based on the following parameters.

Method 3-1: The specific method is similar to that on the terminal side and will not be repeated here;

Implementation method:

Assume that the terminal is a Rel-18 or later version terminal, and the terminal is a terminal that supports the NES feature. In order to support the demand for network energy saving, considering that the network equipment may give up sending the corresponding system information, such as SSB and/or SIB1/SIBn, or give up receiving the corresponding uplink signal, such as RACH, etc. within a certain period of time, the terminal needs to give up receiving the system information or transmitting the uplink signal based on the corresponding network side behavior. It is worth noting that in addition to being applied in the NES scenario, the embodiment of the present disclosure can also be applied in other scenarios, and the embodiment of the present disclosure is not limited to this.

If the network device gives up sending the corresponding information within a certain period of time, the information can be called on-demand information. The embodiment of the present disclosure takes SSB and SIB1 as an example, and the information is on-demand SSB and/or SIB1 to illustrate the embodiment of the present disclosure. Other information is also within the protection scope of the embodiment of the present disclosure and will not be repeated here.

The on demand SSB/SIB status indication involved in the embodiment of the present disclosure includes at least one of the following:

The base station does not send SSB and does not transmit SIB1;

The base station does not send SSB but sends SIB1;

The base station sends SIB1 and does not send SSB;

The base station sends SSB and SIB1 as needed;

The base station sends SIB1 and SSB as needed.

The embodiment of the present disclosure mainly aims at sending a corresponding reference signal to request the base station to transmit the corresponding SSB and/or SIB1 when the base station does not transmit SSB or SIB1 and the terminal needs to send a system message corresponding to SSB and/or SIB1.

The embodiment of the present disclosure mainly designs reference signals to implement the above information request process. Based on this, the process related to the embodiment of the present disclosure is as follows:

Step 1: The terminal determines the configuration information of the SRS used to trigger the request. The configuration information may be determined based on signaling configuration or a predefined method. The specific implementation scenarios may include one or more of the following:

Embodiment 1-2:

In this embodiment, it is assumed that the base station is a base station that supports network energy-saving technology. The base station can choose to stop sending some downlink signals or channels according to the network load, the number of resident terminals, the type of service, the service period, etc. Of course, the decision-making process and strategy of whether the base station sends some downlink signals or channels are not limited in any way in the disclosed embodiment. After the base station receives the indication information sent by the terminal, it can choose to resume sending the downlink signal or channel according to the request information of the terminal. In this embodiment, according to the request of the terminal, the base station determines to send any one or any combination of the following downlink signals or channels: SSB, SIB1, TRS, PDCCH, PDSCH, CSI-RS.

In some embodiments, the downlink signal may also include: PSS and SSS, DRS, etc.

In some embodiments, the downlink signal may also include other newly defined downlink reference signals.

In this embodiment, the terminal sends PUCCH information on the PUCCH, and requests the base station to send a downlink signal and/or a signal through the PUCCH information. In this embodiment, the terminal carries the request information through a reference signal, which is referred to as a reference signal in the subsequent description.

The PUCCH information here is a type of the aforementioned first transmission. In some embodiments, the first transmission may also include various reference signals. The following is an example of a reference signal. When implementing the reference signal in the following embodiments, the reference signal can be replaced by "first transmission".

In this embodiment, the terminal sends a specific reference signal on a periodically occurring reference signal sending resource, and the reference signal is used to request the base station to send a downlink signal and/or a channel. The sending reference signal resource is used by the terminal to send various types of reference signals and/or uplink information requesting a second transmission.

In this embodiment, the terminal determines the time-frequency resources occupied by the reference signal for requesting the base station for downlink transmission by the following method. The disclosed embodiment does not make any provision for the state of the terminal. For example, the disclosed embodiment can be applied to a connected terminal, and can also be applied to an idle (IDLE) or inactive (INACTIVE) terminal. The disclosed embodiment does not make any limitation on which base station the configuration of the time-frequency resources for sending the reference signal comes from. For example, the relevant configuration information in the disclosed embodiment can be sent by the base station from which the terminal requests downlink transmission, or can be sent by other base stations.

Determined according to the configuration information in the cell-specific signaling sent by the base station. The disclosed embodiment does not limit the type of cell-specific signaling, such as SIB1 or other SIBs. Alternatively, it is determined according to the configuration information in the UE-dedicated RRC signaling sent by the base station. Alternatively, it is determined in a manner predefined by the protocol, that is, the terminal sends a reference signal on the default resource specified in the protocol. The reference signal can be used to request a base station downlink transmission.

Since the resources used to request the base station to transmit the reference signal for downlink transmission may be different from those used to send CSI or HARQ confirmation information Or resource conflict of SR information. In this scenario, the embodiment of the present disclosure assumes that the terminal sends CSI or HARQ confirmation or SR information on the resource as needed. Or, in this scenario, the embodiment of the present disclosure assumes that the terminal sends a reference signal on the resource.

In the embodiments of the present disclosure, the transmission resources of the reference signal may include but are not limited to PUCCH resources. For example, in some embodiments, the transmission resources of the reference signal may also include PRACH resources.

For the transmission resource used to send the reference signal, it is an additional transmission resource configured or determined by any of the aforementioned methods, and the transmission resource is different from the traditional resource used to carry ACK/NACK or scheduling request (SR). Alternatively, the transmission resource used to send the reference signal is shared with the existing (legacy) transmission resource, that is, through any of the aforementioned methods, one or more transmission resources are selected in the transmission resource set (set) for sending the indication information requesting the base station to transmit downlink. Under this assumption, the base station needs to inform the terminal of the transmission resource identifier used to send the indication information requesting the base station to transmit downlink, and the transmission resource cannot be used to send CSI information or HARQ confirmation information or SR resources. Alternatively, the terminal needs to determine the transmission resource identifier used to send the downlink transmission indication information in a predefined manner, for example, the transmission resource with the smallest identifier or the largest identifier in the set.

Based on the above assumptions and configurations, the terminal sends a reference signal carrying information for requesting the base station to send downlink transmission on the reference signal resource when it needs to request the base station to send the corresponding downlink signal or channel. In this embodiment, it is assumed that the terminal sends a specific reference signal on the resource to request the base station to send a downlink channel or signal. The information reference signal is used to request the base station to send SSB, or SIB1, or SSB and SIB1, or SSB corresponding to a specific beam, SIB1 corresponding to a beam, or SSB or SIB1 corresponding to a specific beam, or any other combination of downlink channels and/or signals, as described above.

The first transmission reference signal used to request the base station to send a downlink signal or channel can be determined in a predefined manner by the protocol. For example, the length of the reference signal and information composed of specific bits can be agreed upon in a predefined manner such as protocol agreement, for example, ‘00000000000’; it can also be configured by the base station, that is, the base station specifies which bits indicate the corresponding information to be used as the reference signal.

Furthermore, the specific reference signal may correspond to a transmission beam of a downlink signal and/or channel, such as one or more corresponding SSB indices. The correspondence between the aforementioned reference signal and the signal and/or channel requested by the terminal is configured through high-level signaling or determined in a predefined manner by the protocol.

Furthermore, the first transmission may be used to request SSB and/or SIB1 of a specific beam, and the beam is quasi-co-located with the beam used for the first transmission, and the embodiments of the present disclosure do not impose any limitation thereto.

When the terminal is in idle state and/or inactive state, the configuration information is not released. The terminal can still send PUCCH format #2 on the corresponding time-frequency resources according to the configuration information to request the base station to send the corresponding downlink signal or channel.

Further, after the terminal sends the reference signal, the first requested downlink channel and/or signal transmission time domain resource position detection after T receives the corresponding downlink channel and/or signal. T is determined according to the terminal capability, or determined by the configuration information sent by the base station. This T may correspond to the aforementioned first time window. That is, the first time window may be determined according to the capability of the terminal and/or the one-sided time interval for sending and receiving information between the base station and the terminal.

After detecting and receiving the reference signal sent by the terminal, the base station sends the downlink signal or channel requested by the terminal.

Of course, the downlink channel of the reference signal can be any one or any combination of the aforementioned channels or signals, and the embodiments of the present disclosure do not impose any limitations. In addition, taking SSB as an example, during the period when SSB is off (OFF), the base station can selectively send other signals or signals, and the embodiments of the present disclosure do not impose any limitations. In the following example, it is assumed that the terminal can request the base station to send SSB through eight different information reference signals. Exemplarily, when the information ratio is equal to 3 bits, it is assumed that the transmission pattern of SSB is case A at this time, and it is below 3GHz, so there are 4 SSBs in the system. In this example, it is assumed that the correspondence between the reference signal sent by the terminal and the SSB is as follows, and the correspondence is determined by any of the aforementioned methods:

000 corresponds to SSB#0 and SSB#1;

001 corresponds to SSB#2 and SSB#3;

010 corresponds to SSB#0, SSB#1, SSB#2, and SSB#3;

011 corresponds to SSB#0;

100 corresponds to SSB#1;

101 corresponds to SSB#2;

110 corresponds to SSB#3.

In order to fully illustrate the scheme of this embodiment, it is assumed that the terminal sends different reference signals at three different reference signal transmission positions. When the base station does not receive any reference signal sent by any terminal, the base station does not need to send SSB. When the base station receives the reference signal corresponding to '000' sent by the terminal, SSB#0 and SSB#1 are sent; when the base station receives the reference signal corresponding to '001' sent by the terminal, SSB#2 and SSB#3 are sent; when the base station receives the reference signal corresponding to '010' sent by the terminal, SSB#0, SSB#1, SSB#2 and SSB#4 are sent. Other indication information is similar and will not be repeated here.

Of course, as mentioned above, the method of the embodiment of the present disclosure is not limited to SSB, nor is it limited to the correspondence between the reference signal and the downlink signal. For example, in this example, it is assumed that the correspondence between the reference signal sent by the terminal and SIB1 is as follows, and the correspondence is determined by any of the above methods:

000 corresponds to SIB1 transmitted by beam #1;

001 corresponds to SIB1 transmitted by beam #2;

010 corresponds to SIB1 transmitted by beam #3;

011 corresponds to SIB1 transmitted by beam #4;

100 corresponds to SIB1 transmitted in no beam.

Implementation scenario 1:

The terminal obtains the corresponding SRS configuration information based on cell 1, and sends the corresponding SRS request information of cell 1 in cell 1 when it needs to request the base station corresponding to cell 2 to send SIB1 in cell 2.

In this scenario, cell 2 is a cell that transmits SSB and/or SIB1 in on demand mode. Exemplarily, the cell can be called a non-anchor cell. When the terminal needs to transmit SIB1, it needs to send the corresponding SIB1/SSB request information.

In this scenario, cell 1 may be a cell that normally sends SSB and/or SIB1. Exemplarily, the cell may be referred to as an anchor cell.

The anchor cell may configure the SRS configuration for SIB1/SSB request of one or more other cells (eg, non-anchor cells), and at the same time, may also receive SIB1/SSB request information corresponding to multiple non-anchor cells.

Exemplarily, the UE sends SIB1/SSB request information for cell 2 on cell 1. After receiving the request information, the base station corresponding to cell 1 transmits the request information to the base station corresponding to cell 2. After receiving the request information, the base station corresponding to cell 2 can decide whether to send SSB and SIB1 as needed;

The SRS configuration for SIB1/SSB request may include one or more of the following parameters:

Cell ID: The cell ID is the identifier of the non-anchor cell;

Frequency information: the frequency point, frequency band or carrier frequency used by non-anchor cells;

SSB: SSB related information corresponding to the non-anchor cell, such as SSB index and/or frequency domain range.

The time and frequency domain resources corresponding to SRS: starting frequency domain resource unit, number of RBs occupied by the frequency domain, corresponding Comb number, SRS symbol length, SRS symbol starting position, SRS transmission time slot, period, frequency hopping (Frequency Hop, FH), etc. For specific description, see Example 1 and Example 2, which will not be repeated here.

Sequence information corresponding to SRS: number of ports corresponding to SRS, number of CS corresponding to SRS, number of Combs corresponding to SRS, etc. For detailed description, see Embodiment 1 and Embodiment 2, which will not be repeated here.

Functions corresponding to SRS: beamManagement, codebook, nonCodebook, antennaSwitching or other newly defined usages, see Embodiment 1 and Embodiment 2 for details;

After determining the above configuration, the UE may transmit a corresponding reference signal based on the configuration information.

In a possible implementation, the cell corresponding to the request information SRS may be determined based on a predefined method. For example, different cells are associated with different CSs, and when the terminal wants to request SIB1 of cell 2, the CS corresponding to cell 2 may generate an SRS sequence.

After receiving the above SRS sequence, the base station may also determine the corresponding associated cell based on the CS, so as to perform subsequent operations.

Implementation scenario 2:

The terminal obtains the corresponding SRS configuration information based on cell 1, and sends the corresponding SRS request information of cell 2 in cell 2 when it needs to request the base station corresponding to cell 2 to send SIB1 in cell 2.

In this scenario, cell 2 is a cell that transmits SSB and/or SIB1 in on demand mode. Exemplarily, the cell can be called a non-anchor cell. When the terminal needs to transmit SIB1, it needs to send the corresponding SIB1/SSB request information.

In this scenario, cell 1 may be a cell that normally sends SSB and/or SIB1.

Exemplarily, cell 1 may be referred to as an anchor cell. The anchor cell may configure the SRS configuration for SIB1/SSB request of one or more other cells (eg, non-anchor cells).

Exemplarily, the UE obtains the corresponding SRS configuration in cell 1, and sends the corresponding SIB1/SSB request information in cell 2 based on the above configuration. After receiving the above request information, the base station corresponding to cell 2 can decide whether to send SSB and SIB1 as needed;

The SRS configuration for SIB1/SSB request is similar to that in implementation scenario 1 and will not be repeated here.

As described above, after the UE determines the above configuration, it can transmit the corresponding SRS based on the configuration information.

Implementation scenario three:

The terminal obtains the corresponding SRS configuration information based on cell 2, and sends the corresponding SRS request information of cell 2 in cell 2 when it needs to request the base station corresponding to cell 2 to send SIB1 in cell 2.

In this scenario, cell 2 is a cell that transmits SSB and/or SIB1 in on-demand mode. In addition, cell 2 needs to be configured with corresponding SRS configuration information, and the terminal needs to send corresponding SIB1/SSB request information when corresponding SIB1 transmission is required.

In this scenario, cell 2 may require the terminal to obtain the corresponding SRS configuration information before obtaining SIB1. The configuration information needs to be determined through SSB (eg, MIB) configuration or newly defined downlink Common signaling. The configuration information is determined based on Embodiment 1 and Embodiment 2, and will not be described in detail here.

In a possible implementation manner, a pattern of SRS configuration information is determined based on a predefined method. The pattern may be determined based on configuration information. The configuration information is determined based on Embodiment 1 and Embodiment 2, which will not be described in detail here.

In a possible implementation manner, cell 2 determines one of the predefined patterns based on the pdcch-ConfigSIB1 configuration.

It is worth noting that before the UE obtains SIB1, the UE cannot obtain the frequency domain information corresponding to the initial UL BWP. It can only obtain the frequency domain information of the SSB. The resource location of the SRS may use the frequency domain information corresponding to the SSB as a reference location. For details, see the definitions in Embodiment 1 and Embodiment 2, which will not be repeated here.

It is worth noting that before the UE obtains SIB1, the UE cannot obtain the TDD-related configuration information, and can only obtain the time domain information of SSB. The time domain position of SRS may use the time domain position corresponding to SSB as a reference position. See Examples 1 and 2 for specific definitions, which will not be repeated here.

From the terminal perspective, when the terminal determines that cell 2 is in SSB and/or SIB1 off, the terminal determines the SRS configuration information based on pdcch-ConfigSIB1, or determines the pattern of the configuration information, and transmits SRS request SSB and/or SIB1 transmission based on the configuration information.

Implementation scenario 4:

The terminal determines the SRS configuration information based on a predefined method, and when it needs to request the base station corresponding to cell 2 to send SIB1 in cell 2, the terminal sends the corresponding SRS of cell 2 in cell 2.

In this scenario, cell 2 is a cell that transmits SSB and/or SIB1 in on-demand mode. In addition, cell 2 needs to be configured with corresponding SRS configuration information, and the terminal needs to send corresponding SIB1/SSB request information when corresponding SIB1 transmission is required.

In this scenario, cell 2 may require the terminal to obtain the corresponding SRS configuration information before obtaining SIB1. Accordingly, the terminal may need to determine the SRS configuration information based on the SSB corresponding to cell 2. The specific configuration information is similar to the pattern of implementation scenario 3 and will not be repeated here.

In this scenario, the SRS configuration information needs to be determined in a predefined manner. For specific configuration information, see Embodiment 1 and Embodiment 2, which will not be described in detail here.

Step 2: The terminal determines that cell 2 is in an SSB and/or SIB1 off state. The state determination may be based on signaling configuration or a predefined method.

Exemplarily, the terminal determines whether SSB and/or SIB1 is turned on or off by display signaling.

Exemplarily, the terminal determines whether to turn SSB and/or SIB1 on or off based on a predefined method.

Exemplarily, the terminal attempts to receive SSB and/or SIB1 within a first time window, and after the terminal successfully receives SSB and/or SIB1, the terminal determines that it is in an on state of SSB and/or SIB1.

Exemplarily, the terminal attempts to receive SSB and/or SIB1 within the first time window, but does not receive the corresponding SSB/SIB signal, and the terminal determines that it is in the SSB and/or SIB1 closed state.

When SSB is turned on, the network device sends SSB periodically.

When SSB is turned off, the network device will not send SSB periodically.

When SIB1 is in the closed state, the network device will not send SIB1 periodically.

When SIB1 is enabled, the network device will periodically send SIB1.

The first time window is determined based on signaling configuration or a predefined method, and specifically includes one or more of the following:

The starting position of the first time window is determined based on the following method:

The time unit corresponding to the last reception of SSB and/or SIB1 by the terminal, and/or the time unit corresponding to the last blind detection of DCI corresponding to SIB1 (SI-RNTI scrambled DCI 1_0) by the terminal;

The duration of the first time window is determined based on the following method:

M time units, where a time unit can be a frame, a subframe, a time slot, or a symbol;

M SSB transmission periods, or, M SI-RNTI scrambled DCI 1_0 blind detection periods;

N/M is determined based on a predefined or signaling indication method. For example, N is equal to 2 and M is equal to 2.

Step 3: The terminal determines the SRS configuration information and sends corresponding SRS signaling to request SSB and/or SIB1 transmission.

Step 4-a: The base station receives the SRS and determines that the SRS signaling is a signaling requesting SSB/SIB transmission.

SRS is mainly used for uplink channel detection, for example, corresponding to one of beam management, codebook-based measurement, non-codebook-based measurement, and antenna switching, and can be called the first SRS.

In the scenario of the embodiment of the present disclosure, a new function is introduced for SRS, that is, the function of requesting information of SSB and/or SIB1, which can be called the second SRS.

To distinguish the above two functions, the base station can be distinguished based on the following methods:

Based on the time-frequency domain resource distinction, different time-frequency domain resources are configured for the first SRS and the second SRS, and the base station distinguishes different SRSs based on different time-frequency domain resources.

Based on the SRS sequence distinction, different SRS sequences are configured for the first SRS and the second SRS, and the base station distinguishes different SRSs based on different SRS sequences.

Based on the functional distinction corresponding to the SRS, different functions are configured for the first SRS and the second SRS, thereby achieving the purpose of distinguishing the SRS. From the perspective of the terminal, the terminal also distinguishes the first SRS and the second SRS based on the above method, and the specific method is similar to that of the base station, which will not be repeated here.

Step 4-b: The base station receives the SRS and determines whether to transmit the corresponding SSB and/or SIB1.

After receiving the above signal request, the base station may choose to transmit the corresponding SSB and/or SIB1. Alternatively, after receiving the above signal request, the base station may choose not to continue to transmit the corresponding SSB and/or SIB1.

Step 5: After sending the corresponding SSB and/or SIB1 request information, the terminal starts trying to receive the corresponding SSB and/or SIB1.

Exemplarily, the terminal attempts to receive SSB and/or SIB1 within the first time window, and after the terminal successfully receives SSB and/or SIB1, the terminal no longer sends a reference signal.

Exemplarily, the terminal attempts to receive SSB and/or SIB1 within the first time window, but does not receive the corresponding SSB/SIB signal. At this time, the terminal sends a reference signal.

Exemplarily, the terminal attempts to receive SSB and/or SIB1 within the first time window, but does not receive the corresponding SSB/SIB signal. At this time, the terminal abandons SSB and/or SIB1 reception.

Exemplarily, the terminal attempts to receive based on the SSB configuration period or the configuration period corresponding to SIB1. After N consecutive attempts, if the terminal fails to successfully receive the corresponding SSB and/or SIB1, the terminal abandons SSB and/or SIB1 reception; or sends the corresponding reference signal when the terminal has a need.

The first time window is determined based on signaling configuration or a predefined method, and specifically includes one or more of the following:

The starting position of the first time window is determined based on the following method:

The time unit in which the terminal sends the reference signal;

The next SSB transmission period after the terminal sends the reference signal, and/or the DCI blind detection period corresponding to the first SIB after sending the reference signal;

The time unit corresponding to the last reception of SSB and/or SIB1 by the terminal, and/or the time unit corresponding to the last blind detection of DCI corresponding to SIB1 (SI-RNTI scrambled DCI 1_0) by the terminal;

The duration of the first time window is determined based on the following method:

M time units, where the time unit can be a frame, a subframe, a time slot, or a symbol;

M SSB transmission periods, or, M blind detection periods of SI-RNTI scrambled DCI 1_0.

N/M is determined based on a predefined or signaling indication method. For example, N is equal to 2 and M is equal to 2.

The following is a specific implementation process of the embodiment of the present disclosure.

Embodiment 1: The reference signal may be an SRS. The terminal determines the time-frequency domain resources for transmitting the reference signal and the corresponding reference signal sequence based on a predefined or signaling indication, and sends the corresponding reference signal.

The base station determines a reference signal sequence and time-frequency domain resources for transmitting the reference signal, and sends a signaling to indicate the above information.

Embodiment 1.1: Exemplarily, the time-frequency domain resources for transmitting the reference signal are determined based on one or more of the following methods:

Embodiment 1.1.1: The starting resource unit may be determined as follows: illustratively, the reference signal starting unit is the lowest subcarrier position of the uplink BWP, that is, n _shift =0.

Exemplarily, the reference signal starting unit starts at the common resource block (Comment resource block, CRB) #0. Exemplarily, the reference signal starting unit uses the uplink BWP lowest subcarrier position as a reference position. is the starting RB position of BWP. _{n shift} is a high-level configuration parameter.

Exemplarily, the reference signal starting unit takes CRB#0 or point A (Point A) as the reference position.

Exemplarily, the reference signal starting unit uses the frequency domain range where the SSB is located as a reference position. For example, the lowest subcarrier of the SSB, or the center frequency point corresponding to the SSB is used as a reference position, or the lowest subcarrier corresponding to the SSB, or the lowest subcarrier corresponding to the lowest RB that overlaps with the SSB.

Example 1.1.2: The number of occupied RBs may be determined as follows:

Exemplarily, the number of occupied RBs is equal to 4, or the number of occupied RBs is equal to 8.

Exemplarily, the reference signal resource is determined based on index 1 or index 2 of TS 38.211 Table 6.4.2.4.3-1.

Exemplarily, the reference signal does not support frequency hopping in the frequency domain.

Embodiment 1.1.3: Corresponding Comb Number: For example, the Comb number is equal to 2 or the Comb number is equal to 8.

Exemplarily, the RE shift of SRS within an RB is equal to 0.

Embodiment 1.1.4: The reference signal continuation symbol length may be determined as follows: illustratively, the symbol length is equal to a value such as 1 or 2.

Example 1.1.5: The starting position of the reference signal symbol may be as follows:

Exemplarily, the reference signal symbol is the last symbol in a time slot.

Exemplarily, the reference signal symbol is the first symbol in a time slot.

Embodiment 1.1.6: The period of the reference signal may be periodicity (P) or semiperiodicity (SP).

Exemplarily, assuming that the reference signal is SRS, the SRS period is the same as the corresponding transmission period of SSB.

Exemplarily, the time slot where the SRS is located is the time slot position after N time slots are offset based on the time slot where the SSB i is located as the reference position. N is determined based on a predefined or signaling configuration method, and i can be any value, which can be specifically configured or predefined by the network device.

Under the premise that the reference signal is a semi-static SP signal, the base station triggers the SP SRS based on the MAC CE in the related technology. After the terminal receives the trigger signaling, it determines the SP SRS as the reference signal based on the configuration of the SP SRS and the embodiment of the present disclosure.

On the premise that the reference signal is the SP signal, the base station triggers the SP SRS based on the MAC CE signaling, and indicates whether the SP SRS is a reference signal that can be used to request SSB and/or SIB1 based on the MAC CE signaling.

When the terminal receives MAC CE, triggering the corresponding SP SRS transmission, and MAC CE indicates that the corresponding SP SRS is a reference signal, the terminal transmits the reference signal on demand based on the corresponding configuration.

Embodiment 1.2: Exemplarily, the corresponding reference signal sequence is determined based on one or more of the following methods:

Embodiment 1.2.1: SRS corresponds to a port, and the reference signal is an SRS with a port number equal to 1;

Embodiment 1.2.2: SRS corresponds to CS, illustratively, the reference signal corresponds to CS=0;

Embodiment 1.2.3: Comb number corresponding to SRS, illustratively, the Comb number corresponding to the reference signal is equal to 2, and the maximum number of CSs in the Comb number domain is determined based on the following table:

Embodiment 1.3: Exemplarily, the reference signal corresponds to one or more of beamManagement, codebook, nonCodebook, and antennaSwitching. Exemplarily, the reference signal corresponds to one or more of beamManagement, codebook, nonCodebook, and antennaSwitching. Exemplarily, the reference signal corresponds to one or more of beamManagement, codebook, nonCodebook, and antennaSwitching.

Embodiment 1.4: Exemplarily, different SRS sequences may be associated with different SSBs, and/or different SRS sequences may be associated with different CSs.

Taking the example that the same SRS sequence can be associated with different SSBs, and the SRS sequence determined by the terminal according to the SSB requested by itself as an example, the corresponding relationship can be determined based on the following method. Exemplarily, the following provides an example that the same SRS sequence can be associated with different SSBs: sequence #1 corresponds to SSB #0, sequence #2 corresponds to SSB #1, sequence #3 corresponds to SSB #2, sequence #4 corresponds to SSB #3, and sequence #5 corresponds to SSB #0, SSB #1, SSB #2, and SSB #4.

Embodiment 2: The reference signal is a cell common signal determined based on an SRS sequence and time-frequency domain resources. The terminal determines the time-frequency domain resources for transmitting the reference signal and the corresponding reference signal sequence based on a predefined or signaling indication, and sends the corresponding reference signal. The base station determines the reference signal sequence and the time-frequency domain resources for transmitting the reference signal, and sends a configuration signaling. The configuration information indicates information related to the above configuration.

Embodiment 2.1: Exemplarily, the reference signal is configured based on cell-level common signaling.

For example, configure the reference signal based on BWP-UplinkCommon configured in SIB1. Or, configure BWP-UplinkCommon based on ServingCellConfigCommon; and configure the reference signal based on BWP-UplinkCommon.

Exemplarily, the reference signal is a cell-level common parameter configured based on UE-specific signaling, for example, a BWP-Uplinkdedicated configuration based on a ServingCellConfig configuration.

Exemplarily, the reference signal is configured based on a system broadcast message, for example, the reference signal is configured based on pdcch-ConfigSIB1 of the MIB.

Embodiment 2.2: Defining a reference signal dedicated function. Exemplarily, the dedicated function may be a function of requesting a network device to send an SSB and/or a SIB.

Exemplarily, the reference signal function includes but does not precede any one of beamManagement, codebook, nonCodebook, antennaSwitching, SSB and/or SIB request.

Embodiment 2.3: Exemplarily, the time-frequency domain resources for transmitting the reference signal are determined based on Embodiment 1.1, which will not be described in detail here.

Embodiment 2.4: Exemplarily, the transmission reference signal sequence is determined in Embodiment 1.2 and will not be described in detail here.

The disclosed embodiment is mainly based on the SRS mechanism, and the reference signal is designed to trigger the corresponding on-demand signal ServingCellConfig transmission request. It is beneficial to achieve network energy saving while ensuring the communication performance of the terminal and achieving consistent understanding between the base station and the terminal.

In the embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations of other embodiments.

In the embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations of other embodiments.

The embodiments of the present disclosure also provide a device for implementing any of the above methods, for example, a device is provided, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods. For another example, another device is provided, including a unit or module for implementing each step performed by a network device (for example, an access network device, or a core network device, etc.) in any of the above methods.

It should be understood that the division of the units or modules in the above device is only a division of logical functions, which can be fully or partially integrated into one physical entity or physically separated in actual implementation. In addition, the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device. Alternatively, the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be implemented by designing the hardware circuits. The hardware circuits may be understood as one or more processors; for example, in one implementation, the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules may be implemented by designing the logical relationship of the components in the circuits; for another example, in another implementation, the hardware circuits may be implemented by programmable logic devices (PLDs), and Field Programmable Gate Arrays (FPGAs) may be used as an example, which may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuring the configuration files, thereby implementing the functions of some or all of the above units or modules. All units or modules of the above devices may be implemented in the form of software called by the processor, or in the form of hardware circuits, or in the form of software called by the processor, and the remaining part may be implemented in the form of hardware circuits.

In the disclosed embodiments, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

As shown in FIG6A , an embodiment of the present disclosure provides a terminal, wherein the terminal includes:

The sending module 6101 is configured to send a first transmission to a first network device; the first transmission is used to trigger a second network device or the first network device to send a second transmission to the terminal.

In some embodiments, the terminal may further include: a processing module and/or a receiving module.

In some embodiments, the sending module and/or the receiving module may correspond to a network interface and/or a transceiver antenna of the terminal.

In some embodiments, the processing module can be used by the terminal to execute steps related to information processing in any downlink transmission triggering method.

In some embodiments, the sending module can be used by the terminal to execute steps related to information sending in any downlink transmission triggering method.

In some embodiments, the receiving module may be used by the terminal to execute steps related to information sending in any downlink transmission triggering method.

In some embodiments, the sending module is configured to perform at least one of the following:

Sending a reference signal to the first network device;

Sending uplink information to the first network device; the uplink information includes: physical uplink control channel PUCCH information and/or physical random access channel PRACH information.

In some embodiments, the reference signal comprises a sounding reference signal SRS.

In some embodiments, the reference signal includes: a first signal and a second signal; the second signal is used to trigger the second network device or the first network device to send the second transmission; the function of the first signal is different from the function of the second signal.

In some embodiments, the processing module is configured to perform at least one of the following:

determining, according to a resource location of the reference signal, whether the reference signal includes the second signal; the resource location of the second signal is different from the resource location of the first signal;

determining, according to a sequence of the reference signal, whether the reference signal includes the second signal; the sequence of the second signal is different from the sequence of the first signal;

determining, according to a function of the reference signal, whether the reference signal includes the second signal; the function of the second signal is different from the function of the first signal;

According to an information element IE configuring the reference signal, it is determined whether the reference signal includes the second signal; the IE configuring the second signal is different from the IE configuring the first signal.

In some embodiments, the processing module is configured to determine transmission parameters of the first transmission; the transmission parameters include: a signal corresponding to the first transmission and/or a resource location of the first transmission.

In some embodiments, the processing module is configured to perform one of the following:

Determining the transmission parameter according to the configuration information sent by the first network device or the second network device;

The transmission parameters are determined according to a predefined method.

In some embodiments, the first network device corresponds to a first cell; the second network device corresponds to a second cell; and the receiving module is further configured to perform at least one of the following:

receiving the configuration information from the first cell, the configuration information being used by the terminal to send the first transmission to the first cell;

The configuration information is received from the second cell, where the configuration information is used by the terminal to send the first transmission to the first cell.

In some embodiments, the sending module is configured to perform at least one of the following:

receiving dedicated signaling sent by the first network device or the second network device, where the dedicated signaling includes the configuration information;

receiving common signaling sent by the first network device or the second network device, where the common signaling includes the configuration information;

Receive broadcast signaling sent by the first network device or the second network device, where the broadcast signaling includes the configuration information.

In some embodiments, the transmission parameter indicates at least one of the following:

Time domain position information, used to determine the time domain position of the first transmission;

sequence information indicating a sequence used by the first transmission;

Port information, indicating a sending port for the first transmission;

Cyclic shift information indicating a cyclic shift value of a sequence used for the first transmission;

Frequency domain position information, used to determine the frequency domain position of the first transmission;

The format information is used to indicate the format of the first transmission.

In some embodiments, the time domain location information includes at least one of the following:

Starting time domain position information, indicating the starting time domain position of the first transmission;

timeslot information, indicating a timeslot in which the first transmission occurs;

Duration information, indicating the duration of the first transmission once;

The period information indicates the period of the first transmission.

In some embodiments, the frequency domain location information includes at least one of the following:

Resource block RB information, indicating the number of RBs occupied by the first transmission;

comb information, indicating the number of combs when the first transmission uses the comb resource;

Resource unit RE information indicates the number of REs and/or RE offset occupied by the first transmission.

In some embodiments, the determining of the transmission parameters of the first transmission further comprises:

determining a sequence of the first transmission according to at least one of a port of the first transmission, a comb number when the first transmission uses comb resources, and a CS of a sequence used by the first transmission;

In some embodiments, the receiving module is configured to receive the second transmission within a first time window after sending the first transmission.

In some embodiments, the first time window is determined according to a predefined method; or,

The time window is determined according to network signaling.

In some embodiments, the sending module is configured to continue sending the first transmission to the first network device if the second transmission is not received within the first time window.

In some embodiments, the second transmission includes at least one of the following:

System Information Block SIB;

Downlink reference signal;

Downlink channel information.

In some embodiments, the downlink reference signal includes at least one of the following:

Synchronous signal broadcast block SSB;

Primary synchronization signal PSS;

Secondary synchronization signal SSS;

Tracking reference signal TRS;

Channel state information reference signal CSI-RS;

Discover the reference signal DRS.

In some embodiments, the downlink channel information includes at least one of the following:

Physical downlink control channel PDCCH information;

Physical downlink shared channel PDSCH information.

As shown in FIG6B , an embodiment of the present disclosure provides a first network device, wherein the network device includes:

The receiving module 6201 is configured to receive a first transmission sent by a terminal; the first transmission is used to trigger the second network device or the first network device to send a second transmission.

In some embodiments, the network device may further include: a processing module and/or a receiving module.

In some embodiments, the processing module may be configured to execute any steps related to information processing in the downlink transmission triggering method executed by the first network device.

In some embodiments, the sending module and/or the receiving module may correspond to a network interface and/or a transceiver antenna of the first network device.

In some embodiments, the receiving module is configured to perform at least one of the following:

receiving a reference signal sent by the terminal; the reference signal includes a first type of signal and/or a reference signal;

Receive uplink information sent by the terminal; the uplink information includes: physical uplink control channel PUCCH information and/or physical random access channel PRACH information.

In some embodiments, the reference signal comprises a sounding reference signal SRS.

In some embodiments, the reference signal includes: a first signal and a second signal; the second signal is used to trigger the second network device or the first network device to send the second transmission; the function of the first signal is different from that of the second signal.

In some embodiments, the resource location of the second signal is different from the resource location of the first signal; and/or,

The sequence of the second signal is different from the sequence of the first signal; and/or,

The function of the second signal is different from the function of the first signal; and/or,

The information element IE configuring the second signal is different from the IE configuring the first signal.

In some embodiments, the processing module is configured to determine transmission parameters of the first transmission; the transmission parameters include: a signal corresponding to the first transmission and/or a resource location of the first transmission.

In some embodiments, the processing module is configured to determine the transmission parameter according to the configuration information sent by the first network device or the second network device; and determine the transmission parameter according to a predefined method.

In some embodiments, the first network device corresponds to a first cell; the second network device corresponds to a second cell;

The first cell is used to send the configuration information; the configuration information is used by the terminal to send the first transmission to the first cell; or,

The second cell is used to send the configuration information; the configuration information is used by the terminal to send the first transmission to the first cell.

In some embodiments, the configuration information is carried in proprietary signaling; or,

The configuration information is carried in public signaling; or,

The configuration information is carried in the broadcast signaling.

In some embodiments, the transmission parameter indicates at least one of the following:

Time domain position information, used to determine the time domain position of the first transmission;

sequence information indicating a sequence used by the first transmission;

Port information, indicating a sending port for the first transmission;

Cyclic shift information indicating a cyclic shift value of a sequence used for the first transmission;

Frequency domain position information, used to determine the frequency domain position of the first transmission;

The format information is used to indicate the format of the first transmission.

In some embodiments, the time domain location information includes at least one of the following:

Starting time domain position information, indicating the starting time domain position of the first transmission;

timeslot information, indicating a timeslot in which the first transmission occurs;

Duration information, indicating the duration of the first transmission once;

The period information indicates the period of the first transmission.

In some embodiments, the frequency domain location information includes at least one of the following:

Resource block RB information, indicating the number of RBs occupied by the first transmission;

comb information, indicating the number of combs when the first transmission uses the comb resource;

Resource unit RE information indicates the number of REs occupied by the first transmission.

In some embodiments, the processing module is configured to determine a sequence of the first transmission according to a port of the first transmission and a comb number when the first transmission uses a comb resource.

In some embodiments, the receiving module is configured to send the second transmission within a first time window after receiving the first transmission; or, after receiving the first transmission, send the first transmission to the second network device within a first time window.

In some embodiments, the processing module is configured to determine the first time window according to a predefined method; or determine the time window according to network signaling.

In some embodiments, the second transmission includes at least one of the following:

System Information Block SIB;

Downlink reference signal;

Downlink channel information.

In some embodiments, the downlink reference signal includes at least one of the following:

Synchronous signal broadcast block SSB;

Primary synchronization signal PSS;

Secondary synchronization signal SSS;

Tracking reference signal TRS;

Channel state information reference signal CSI-RS;

Find the reference signal.

In some embodiments, the downlink channel information includes at least one of the following:

Physical downlink control channel PDCCH information;

Physical downlink shared channel PDSCH information.

As shown in FIG6C , an embodiment of the present disclosure provides a second network device, comprising:

The receiving module 6301 is configured to receive a first transmission from a terminal from a first network device; the first transmission is used to trigger a second network device to send a second transmission to the terminal.

In some embodiments, the second network device may further include a sending module and/or a processing module.

In some embodiments, the second network device may further include: a processing module and/or a receiving module.

In some embodiments, the processing module may be configured to execute any steps related to information processing in the downlink transmission triggering method executed by the second network device.

In some embodiments, the sending module and/or the receiving module may correspond to a network interface and/or a transceiver antenna of the second network device.

In some embodiments, the sending module is configured to send configuration information to the terminal; the configuration information is used by the terminal to determine transmission parameters of the first transmission.

An embodiment of the present disclosure further provides a communication device, which may include: one or more processors; wherein the processor is used to call instructions so that the communication device executes a downlink transmission triggering method that can be implemented in any of the aforementioned embodiments.

7A and/or 7B, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memory 8102 may also be outside the communication device 8100.

The communication device may be the aforementioned terminal and network device. In some embodiments, the network device may be a primary node and/or an auxiliary node.

In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the communication steps such as sending and receiving in the above method are executed by the transceiver 8103, and the other steps are executed by the processor 8101.

In some embodiments, the transceiver may include a receiver and a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

Optionally, the communication device 8100 further includes one or more interface circuits 8104, which are connected to the memory 8102. The interface circuit 8104 can be used to receive signals from the memory 8102 or other devices, and can be used to send signals to the memory 8102 or other devices. For example, the interface circuit 8104 can read instructions stored in the memory 8102 and send the instructions to the processor 8101.

The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 7A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

7B is a schematic diagram of the structure of a chip 8200 provided in an embodiment of the present disclosure. In the case where the communication device 8100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 8200 shown in FIG. 7B , but the present invention is not limited thereto.

The chip 8200 includes one or more processors 8201, and the processor 8201 is used to call instructions so that the chip 8200 executes any of the above downlink transmission triggering methods.

In some embodiments, the chip 8200 further includes one or more interface circuits 8202, which are connected to the memory 8203. The interface circuit 8202 can be used to receive signals from the memory 8203 or other devices, and the interface circuit 8202 can be used to send signals to the memory 8203 or other devices. For example, the interface circuit 8202 can read the instructions stored in the memory 8203 and send the instructions to the processor 8201. Optionally, the terms such as interface circuit, interface, transceiver pin, and transceiver can be replaced with each other.

In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Optionally, all or part of the memory 8203 may be outside the chip 8200.

The present disclosure also provides a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 8100, the communication device 8100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but it can also be a temporary storage medium.

The present disclosure also provides a program product, and when the program product is executed by the communication device 8100, the communication device 8100 executes any of the above downlink transmission triggering methods. Optionally, the program product is a computer program product.

The present disclosure also provides a computer program, which, when executed on a computer, enables the computer to execute any of the above downlink transmission triggering methods.

Those skilled in the art will readily appreciate other implementations of the disclosed embodiments after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the disclosed embodiments, which follow the general principles of the disclosed embodiments and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the disclosed embodiments are indicated by the following claims.

It should be understood that the embodiments of the present disclosure are not limited to the precise structures described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present disclosure is limited only by the appended claims.

Claims (44)

A downlink transmission triggering method, wherein the method is executed by a terminal, and the method includes: A first transmission is sent to a first network device; the first transmission is used to trigger a second network device or the first network device to send a second transmission to the terminal. The method of claim 1, wherein sending the first transmission to the first network device comprises at least one of the following: Sending a reference signal to the first network device; Sending uplink information to the first network device; the uplink information includes: physical uplink control channel PUCCH information and/or physical random access channel PRACH information. The method according to claim 1 or 2, wherein the reference signal comprises: a sounding reference signal SRS. The method according to claim 2 or 3, wherein the reference signal includes: a first signal and a second signal; the second signal is used to trigger the second network device or the first network device to send the second transmission; and the function of the first signal is different from the function of the second signal. The method according to claim 4, wherein the method further comprises at least one of the following: determining, according to a resource location of the reference signal, whether the reference signal includes the second signal; the resource location of the second signal is different from the resource location of the first signal; determining, according to a sequence of the reference signal, whether the reference signal includes the second signal; the sequence of the second signal is different from the sequence of the first signal; determining, according to a function of the reference signal, whether the reference signal includes the second signal; the function of the second signal is different from the function of the first signal; According to the information element IE configuring the reference signal, it is determined whether the reference signal includes the second signal. The method according to any one of claims 1 to 5, wherein the method further comprises: Determine transmission parameters of the first transmission; the transmission parameters include: a signal corresponding to the first transmission and/or a resource location of the first transmission. The method according to claim 6, wherein the determining the transmission parameters of the first transmission comprises at least one of the following: Determining the transmission parameter according to the configuration information sent by the first network device or the second network device; The transmission parameters are determined according to a predefined method. The method according to claim 7, wherein the first network device corresponds to a first cell; the second network device corresponds to a second cell; and the method further comprises at least one of the following: receiving the configuration information from the first cell, the configuration information being used by the terminal to send the first transmission to the first cell; The configuration information is received from the second cell, where the configuration information is used by the terminal to send the first transmission to the first cell. The method according to claim 7 or 8, wherein the configuration information sent by the first network device or the second network device includes at least one of the following: receiving dedicated signaling sent by the first network device or the second network device, where the dedicated signaling includes the configuration information; receiving common signaling sent by the first network device or the second network device, where the common signaling includes the configuration information; Receive broadcast signaling sent by the first network device or the second network device, where the broadcast signaling includes the configuration information. The method according to any one of claims 6 to 9, wherein the transmission parameter indicates at least one of the following: Time domain position information, used to determine the time domain position of the first transmission; sequence information indicating a sequence used by the first transmission; Port information, indicating a sending port for the first transmission; Cyclic shift information indicating a cyclic shift value of a sequence used for the first transmission; Frequency domain position information, used to determine the frequency domain position of the first transmission; The format information is used to indicate the format of the first transmission. The method according to claim 10, wherein the time domain location information includes at least one of the following: Starting time domain position information, indicating the starting time domain position of the first transmission; timeslot information, indicating a timeslot in which the first transmission occurs; Duration information, indicating the duration of the first transmission; The period information indicates the period of the first transmission. The method according to claim 10, wherein the frequency domain location information comprises at least one of the following: Resource block RB information, indicating the number of RBs occupied by the first transmission; comb information, indicating the number of combs when the first transmission uses the comb resource; Resource unit RE information indicates the number of REs and/or RE offset occupied by the first transmission. The method according to claim 6, wherein the determining the transmission parameters of the first transmission further comprises: The sequence of the first transmission is determined according to at least one of a port of the first transmission, a comb number corresponding to the first transmission, and a cyclic shift CS of a sequence used by the first transmission. The method according to any one of claims 1 to 13, wherein the method further comprises: The second transmission is received within a first time window after sending the first transmission. The method according to claim 14, wherein the first time window is determined according to a predefined method; or The time window is determined according to network signaling. The method according to claim 14 or 15, wherein the method further comprises: In the event that the second transmission is not received within the first time window, continuing to send the first transmission to the first network device. The method according to any one of claims 1 to 16, wherein the second transmission comprises at least one of the following: System Information Block SIB; Downlink reference signal; Downlink channel information. The method according to claim 17, wherein the downlink reference signal comprises at least one of the following: Synchronous signal broadcast block SSB; Primary synchronization signal PSS; Secondary synchronization signal SSS; Tracking reference signal TRS; Channel state information reference signal CSI-RS; Discover the reference signal DRS. The method according to claim 17 or 18, wherein the downlink channel information includes at least one of the following: Physical downlink control channel PDCCH information; Physical downlink shared channel PDSCH information. A downlink transmission triggering method, wherein the method is performed by a first network device, and the method comprises: A first transmission sent by a receiving terminal; the first transmission is used to trigger a second network device or the first network device to send a second transmission. The method of claim 20, wherein the first transmission sent by the receiving terminal; the first transmission comprises at least one of the following: receiving a reference signal sent by the terminal; the reference signal includes a first type of signal and/or a reference signal; Receive uplink information sent by the terminal; the uplink information includes: physical uplink control channel PUCCH information and/or physical random access channel PRACH information. The method according to claim 20 or 21, wherein the reference signal comprises: a sounding reference signal SRS. The method according to claim 21 or 22, wherein the reference signal includes: a first signal and a second signal; the second signal is used to trigger the second network device or the first network device to send the second transmission; the function of the first signal is different from that of the second signal. The method according to claim 23, wherein The resource location of the second signal is different from the resource location of the first signal; and/or, The sequence of the second signal is different from the sequence of the first signal; and/or, The function of the second signal is different from the function of the first signal; and/or, The information element IE configuring the second signal is different from the IE configuring the first signal. The method according to any one of claims 20 to 24, wherein the method further comprises: Determine transmission parameters of the first transmission; the transmission parameters include: a signal corresponding to the first transmission and/or a resource location of the first transmission. The method of claim 24, wherein the determining the transmission parameters of the first transmission comprises at least one of the following: Determining the transmission parameter according to the configuration information sent by the first network device or the second network device; The transmission parameters are determined according to a predefined method. The method according to claim 26, wherein the first network device corresponds to a first cell; and the second network device The device corresponds to the second cell; The first cell is used to send the configuration information; the configuration information is used by the terminal to send the first transmission to the first cell; or, The second cell is used to send the configuration information; the configuration information is used by the terminal to send the first transmission to the first cell. The method according to claim 26 or 27, wherein The configuration information is carried in a dedicated signaling; or, The configuration information is carried in public signaling; or, The configuration information is carried in the broadcast signaling. The method according to any one of claims 25 to 28, wherein the transmission parameter indicates at least one of the following: Time domain position information, used to determine the time domain position of the first transmission; sequence information indicating a sequence used by the first transmission; Port information, indicating a sending port for the first transmission; Cyclic shift information indicating a cyclic shift value of a sequence used for the first transmission; Frequency domain position information, used to determine the frequency domain position of the first transmission; The format information is used to indicate the format of the first transmission. The method according to claim 29, wherein the temporal location information comprises at least one of the following: Starting time domain position information, indicating the starting time domain position of the first transmission; timeslot information, indicating a timeslot in which the first transmission occurs; Duration information, indicating the duration of the first transmission once; The period information indicates the period of the first transmission. The method according to claim 29, wherein the frequency domain location information comprises at least one of the following: Resource block RB information, indicating the number of RBs occupied by the first transmission; comb information, indicating the number of combs when the first transmission uses the comb resource; Resource unit RE information indicates the number of REs occupied by the first transmission. The method of claim 25, wherein determining a transmission parameter of the first transmission comprises: A sequence of the first transmission is determined according to a port of the first transmission and a comb number when the first transmission uses comb resources. The method according to any one of claims 20 to 31, wherein the method further comprises: after receiving the first transmission, sending the second transmission within a first time window; or, After receiving the first transmission, the first transmission is sent to the second network device within a first time window. The method according to claim 33, wherein the method further comprises: Determine the first time window according to a predefined method; or, The time window is determined according to network signaling. The method according to any one of claims 20 to 33, wherein the second transmission comprises at least one of the following: System Information Block SIB; Downlink reference signal; Downlink channel information. The method according to claim 34, wherein the downlink reference signal comprises at least one of the following: Synchronous signal broadcast block SSB; Primary synchronization signal PSS; Secondary synchronization signal SSS; Tracking reference signal TRS; Channel state information reference signal CSI-RS; Find the reference signal. The method according to claim 35 or 36, wherein the downlink channel information includes at least one of the following: Physical downlink control channel PDCCH information; Physical downlink shared channel PDSCH information. A downlink transmission triggering method, wherein the method is performed by a second network device, and the method comprises: A first transmission from a terminal is received from a first network device; the first transmission is used to trigger a second network device to send a second transmission to the terminal. The method according to claim 38, wherein the method further comprises: Sending configuration information to the terminal; the configuration information is used by the terminal to determine transmission parameters of the first transmission. A terminal, comprising: The sending module is configured to send a first transmission to a first network device; the first transmission is used to trigger a second network device or the first network device to send a second transmission to the terminal. A first network device, comprising: The receiving module is configured to receive a first transmission sent by a terminal; the first transmission is used to trigger the second network device or the first network device to send a second transmission. A second network device, comprising: The receiving module is configured to receive a first transmission from a terminal from a first network device; the first transmission is used to trigger a second network device to send a second transmission to the terminal. A communication device, wherein the communication device comprises: one or more processors; The processor is used to call instructions to enable the communication device to execute the method described in any one of claims 1 to 19 and/or claims 20 to 37 or 38 to 39. A storage medium, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the method described in any one of claims 1 to 19 and/or claims 20 to 37 or 38 to 39.