WO2025162097A1 - Measurement-based handover method and apparatus, and storage medium - Google Patents

Abstract

The present disclosure relates to the technical field of communications. Provided are a measurement-based handover method and apparatus, and a storage medium. The method comprises: performing measurement on the basis of a reference signal to obtain a measurement result, wherein the reference signal is associated with first information, and the first information is used for identifying the source of the reference signal; and sending target content, the target content comprising at least one of the following: the measurement result, a handover notification or a handover request, wherein the handover notification comprises the first information, and the handover request comprises the first information. In the solution, compared with a method in which a network device performs configuration or triggering, a terminal device directly initiating measurement can improve the measurement efficiency.

Description

Measurement-based switching method, device, and storage medium

This disclosure claims priority to the Chinese patent application filed with the China Patent Office on February 4, 2024, with application number 202410159527.2 and application name “Measurement-based switching method, device and storage medium”, the entire contents of which are incorporated by reference into this disclosure.

Technical Field

The present disclosure relates to the field of communication technologies, and in particular to a measurement-based switching method, device, and storage medium.

Background Art

The terminal device establishes a connection with the access device, which provides communication services to the terminal device, thereby realizing the communication services of the terminal device. Among them, the access device includes but is not limited to: base station or transmitter receiving point TRP, etc.

In actual applications, the quality of communication services provided by access devices fluctuates, affecting the quality of communication services of terminal devices. To ensure the normal execution of communication services of terminal devices, network devices configure or trigger terminal devices to perform measurements and report measurement results, and switch the access device to which the terminal device is connected based on the measurement results.

However, the configuration or triggering method of network devices has the problem of low measurement efficiency.

Summary of the Invention

The present disclosure provides a measurement-based switching method, device, and storage medium, which solve the technical problem of low measurement efficiency.

In a first aspect, the present disclosure provides a measurement-based switching method, which is applied to a terminal, including: performing measurement based on a reference signal to obtain a measurement result, wherein the reference signal is associated with first information, and the first information is used to identify the source of the reference signal; sending target content, the target content including at least one of the following: the measurement result, a switching notification or a switching request, the switching notification including the first information, and the switching request including the first information.

In this implementation, the terminal device directly initiates the measurement, which can improve the measurement efficiency compared to the method of network device configuration or triggering.

In a possible implementation, the method further includes: determining whether the measurement result satisfies a first condition; and if the measurement result satisfies the first condition, sending a switching notification or sending a switching request; wherein the first condition is at least one of the following: a measurement scale of the target reference signal is greater than a measurement scale of the current reference signal, or the measurement scale of the target reference signal is within a first range, or a difference between the measurement scale of the target reference signal and the measurement scale of the current reference signal is within a second range.

In one possible embodiment, the method further includes: determining a target index value based on the first information, and receiving a signal associated with the target index value; and/or determining a target transmission mode based on second information, and receiving a signal of a source of a reference signal through the target transmission mode, wherein the second information is used to identify the target transmission mode.

In one possible implementation, the reference signal includes at least one of the following: a demodulation reference signal DMRS of a physical uplink shared channel PDSCH, a channel state information reference signal CSI-RS, or a synchronization signal block SSB; the method further includes: determining first information associated with the reference signal based on the configuration of the reference signal.

In a possible embodiment, the manner in which the DMRS of the PDSCH indicates the first information includes at least one of the following: indicating the first information through a sequence configured by high-level parameters; indicating the first information through downlink control information DCI; indicating the first information through the beam state of the DMRS of the PDSCH.

In a possible implementation, the method further includes: determining a first set, where the first set includes multiple reference signals; and measuring the multiple reference signals in the first set respectively to determine a target reference signal.

In a possible implementation, performing measurement according to a reference signal to obtain a measurement result includes: performing measurement according to a reference signal within a target time window to obtain the measurement result.

In this embodiment, since the reference signal changes dynamically, the reference signal is measured within a certain time window to avoid the problem of low accuracy of the measurement result caused by excessive changes in the reference signal.

In a possible implementation, performing measurement according to a reference signal to obtain a measurement result includes: determining a power offset value; and performing measurement according to the reference signal and the power offset value to obtain the measurement result.

In this embodiment, the measurement result is corrected by the offset value to improve the accuracy of the measurement result.

In one possible embodiment, the switching notification or switching request also includes second information, and the second information is used to identify the target transmission mode, and the second information includes at least one of the following: target transmission mode; the correspondence between the target transmission mode and the number of streams; the correspondence between the target index value and the number of streams; the correspondence between the target index value and the target transmission mode.

In a possible implementation manner, the first information includes at least one of the following: a current index value or a target index value, where the current index value is used to identify the source of the current reference signal, and the target index value is used to identify the source of the target reference signal.

In a possible implementation, the target transmission mode includes at least one of the following: correlated joint transmission (CJT), space division multiplexing (SDM), time division multiplexing (TDM), frequency division multiplexing (FDM), single frequency network (SFN), or dynamic point selection (DPS).

In a second aspect, the present disclosure provides a measurement-based switching method, which is applied to a network device. The method includes: receiving target content, where the target content includes at least one of the following: a measurement result, a switching notification, or a switching request.

In one possible implementation, the switching notification includes first information and/or second information; the method further includes: determining the target access device associated with the target index value based on the first information and/or the second information; and sending the switching notification to the target access device.

In one possible embodiment, the first information includes at least one of the following: a current index value or a target index value, the current index value is used to identify the source of the current reference signal, and the target index value is used to identify the source of the target reference signal; the second information includes the current transmission mode and at least one of the following: the target transmission mode; the correspondence between the target transmission mode and the number of streams; the correspondence between the target index value and the number of streams; the correspondence between the target index value and the target transmission mode.

In a possible implementation, the method further includes: determining a first access device associated with the target transmission mode; and sending the switching notification to the first access device.

In a possible implementation, the switching request includes first information and/or second information; the method further includes: determining the target access device associated with the target index value based on the first information and/or the second information; and performing the switching.

In a possible implementation, the method further includes: determining a first access device associated with the target transmission mode; and performing switching to perform communication services for the terminal device through the target transmission mode.

In a possible implementation, the target transmission mode includes at least one of the following: correlated joint transmission (CJT), space division multiplexing (SDM), time division multiplexing (TDM), frequency division multiplexing (FDM), single frequency network (SFN), or dynamic point selection (DPS).

In a possible implementation, the method further includes: sending response information, where the response information indicates that the network device has received the measurement result.

In a possible implementation, the method further includes: sending response information via signaling, where the signaling includes at least one of the following: ACK signaling, media access control-element MAC-CE signaling, or downlink control information DCI signaling.

In a possible implementation, the method further includes: sending a power offset value, where the power offset value is used to correct a measurement error.

In a third aspect, the present disclosure provides a measurement-based switching device, which is applied to a terminal, and includes: a measurement module, which is used to perform measurements based on a reference signal to obtain a measurement result, wherein the reference signal is associated with first information, and the first information is used to identify the source of the reference signal; a determination module, which is used to send target content, and the target content includes at least one of the following: the measurement result, the switching notification or the switching request, the switching notification includes the first information, and the switching request includes the first information.

In a fourth aspect, the present disclosure provides a measurement-based switching apparatus, applied to a network device, comprising: a second receiving module, configured to receive target content, wherein the target content comprises at least one of the following: a measurement result, a switching notification, or a switching request.

In a fifth aspect, the present disclosure provides a measurement-based switching device, including: a memory, a transceiver, and a processor: a memory for storing a computer program; a transceiver for sending and receiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations: performing measurements based on a reference signal to obtain a measurement result, wherein the reference signal is associated with first information, and the first information is used to identify the source of the reference signal; sending target content, wherein the target content includes at least one of the following: the measurement result, a switching notification, or a switching request, the switching notification includes the first information, and the switching request includes the first information.

In a possible implementation, the processor is configured to determine whether the measurement result satisfies a first condition; if the measurement result satisfies the first condition, send a handover notification or a handover request.

In one possible embodiment, the processor is used to determine a target index value based on the first information and receive a signal associated with the target index value; and/or determine a target transmission mode based on second information and receive a signal of a source of a reference signal through the target transmission mode, wherein the second information is used to identify the target transmission mode.

In a sixth aspect, the present disclosure provides a measurement-based switching device, including a memory, a transceiver, and a processor: the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: receiving a switching notification or a switching request.

In a seventh aspect, the present disclosure provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method as described in any one of the first aspects.

In an eighth aspect, the present disclosure provides a computer program product, comprising a computer program, wherein the computer program is executed by a processor as described in any one of the methods in the first aspect.

The present disclosure provides a measurement-based switching method, device and storage medium, the method comprising: performing measurements based on a reference signal to obtain a measurement result, wherein the reference signal is associated with a first information, and the first information is used to identify the source of the reference signal; sending a target content, wherein the target content includes at least one of the following: the measurement result, a switching notification or a switching request, the switching notification includes the first information, and the switching request includes the first information. In the above scheme, the terminal device directly initiates the measurement, which can improve the measurement efficiency compared to the method of configuring or triggering the network device. It should be understood that the content described in the above invention content section is not intended to limit the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easy to understand through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is a schematic diagram of an application scenario of a measurement-based switching method provided by an embodiment of the present disclosure;

FIG2 is a schematic diagram of a flow chart of a measurement-based switching method provided by an embodiment of the present disclosure;

FIG3 is a schematic diagram of measurement reporting provided by an embodiment of the present disclosure;

FIG4 is a schematic diagram of measurement reporting provided by an embodiment of the present disclosure;

FIG5 is a schematic diagram of a switching notification provided by an embodiment of the present disclosure;

FIG6 is a schematic structural diagram of a measurement-based switching device provided in an embodiment of the present disclosure;

FIG7 is a schematic structural diagram of a measurement-based switching device provided in an embodiment of the present disclosure;

FIG8 is a schematic structural diagram of a measurement-based switching device provided in an embodiment of the present disclosure;

FIG9 is a schematic structural diagram of a measurement-based switching device provided in an embodiment of the present disclosure.

DETAILED DESCRIPTION

In the embodiments of the present disclosure, the term "and/or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and/or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the associated objects are in an "or" relationship.

In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar thereto.

The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure and not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

The following is a brief description of the terms and nouns involved in the embodiments of the present disclosure.

A Transmitter Receiver Point (TRP) is a comprehensive set of wireless transmitters and receivers used to transmit and receive wireless signals. These signals can be voice, video, data, and other information. Using a TRP, wireless communication systems can achieve coverage and signal transmission, providing reliable communication services in various locations and environments.

Correlated Joint Transmission (CJT): This method combines the frequency or time domain information of multiple signals for signal processing and transmission. This transmission method fully exploits the correlation between signals, improving transmission quality and reliability.

Noncorrelated joint transmission (NCJT): Multiple signals are processed and transmitted independently, without considering the correlation between the signals. This transmission method can reduce the complexity of signal processing and is suitable for scenarios where the correlation between signals is weak.

Dynamic Point Selection: A downlink coordinated multi-point technology used to dynamically switch the service data transmission point of a user device among the terminal device's set of coordinated transmission points.

Acknowledgement (ACK) signaling: used to confirm that a previously sent request has been successfully processed.

Media Access Control-Control Element (MAC-CE) signaling: This describes the media access control protocol data unit used in wireless communications. It coordinates the use of the shared transmission medium by multiple transmitting and receiving stations and ensures reliable and efficient data transmission. Using MAC-CE signaling, flexible media access control policies can be implemented to meet the needs of different application scenarios.

Downlink Control Information (DCI) signaling: A signal used to transmit downlink control information. DCI signaling indicates downlink data transmission scheduling information, downlink channel status information, and other downlink control information.

The application scenario of the embodiment of the present disclosure is described with reference to FIG1 :

Figure 1 is a schematic diagram of an application scenario provided by an embodiment of the present disclosure. As shown in Figure 1, the scenario includes: a terminal device and an access device. The terminal device is connected to the access device, and the access device provides communication services to implement the communication services of the terminal device.

In related technologies, a network device configures or triggers a terminal device to perform measurement. After receiving the configuration or instruction from the network device, the terminal device starts to perform measurement.

However, this method has the following problems: the generation of configurations or instructions by the network device and the reception of the configurations or instructions by the terminal device result in a time delay in the measurement of the terminal device, which in turn leads to low measurement efficiency.

The terminal device in the embodiments of the present disclosure may also be referred to as: user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.

A terminal device can be a device that provides voice/data connectivity to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminal devices include: mobile phones, tablet computers, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart Wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in future evolved public land mobile networks (PLMNs), etc., are not limited by the present disclosure.

By way of example and not limitation, in the present disclosure, a terminal device may be a terminal device in an Internet of Things (IoT) system. The IoT is an important component of the future development of information technology. Its primary technical feature is connecting objects to the Internet through communication technologies, thereby realizing an intelligent network that interconnects humans and machines, and things and things. For example, the terminal device in the embodiments of the present disclosure may be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for wearable devices that utilize wearable technology to intelligently design and develop wearable devices, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that can be worn directly on the body or integrated into a user's clothing or accessories. Wearable devices are not merely hardware devices; they can also achieve powerful functionality through software support, data interaction, and cloud-based interaction. Broadly speaking, wearable smart devices include devices that are fully functional, large in size, and can function completely or partially independently of a smartphone, such as smart watches or smart glasses, as well as devices that focus on a specific application function and require integration with other devices, such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

As an example and not a limitation, in the embodiments of the present disclosure, the terminal device may also be a terminal device in machine type communication (MTC). In addition, the terminal device may also be an on-board module, on-board module, on-board component, on-board chip, or on-board unit built into a vehicle as one or more components or units. The vehicle may implement the method provided by the present disclosure through the built-in on-board module, on-board module, on-board component, on-board chip, or on-board unit. Therefore, the embodiments of the present disclosure may also be applied to vehicle networks, such as vehicle to everything (V2X), long-term evolution-vehicle (LTE-V), and vehicle-to-vehicle (V2V) technologies.

The terminal device in the embodiment of the present disclosure sends relevant information or similar descriptions to the network device, which only indicates that the terminal device sends the relevant information in the form of a wireless signal, and its intended recipient is the network device. The network device can obtain the relevant information by receiving the wireless signal.

The network device involved in the embodiments of the present disclosure may be a base station, which may include multiple cells providing services to terminals. Depending on the specific application scenario, a base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device over the air interface through one or more sectors, or may be called another name. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present disclosure may be an evolved network device (eNB or e-NodeB) in a long-term evolution (LTE) system, a 5G base station (gNB) in a next-generation system, etc., or a home evolved Node B (HeNB), a relay node, a femto base station, a pico base station, a network test device, etc., and is not limited in the embodiments of the present disclosure. In some network structures, network devices may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and the distributed unit may also be geographically separated.

The technical solutions of the present disclosure and the technical solutions of the present disclosure are described in detail below with reference to specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. In the description of the present disclosure, unless otherwise clearly specified and limited, each term should be understood in a broad sense in the art. The embodiments of the present disclosure will be described below in conjunction with the accompanying drawings.

FIG2 is a flow chart of a measurement-based handover method provided by an embodiment of the present disclosure, the method comprising the following steps:

S201. Perform measurement according to a reference signal to obtain a measurement result, where the reference signal is associated with first information, and the first information is used to identify a source of the reference signal.

The reference signal is used for channel estimation or channel sounding, there is at least one reference signal, and the reference signal originates from a network device. The measurement result indicates the signal quality of the reference signal or the link quality of the corresponding channel.

In some embodiments, the terminal device may initiate measurement by performing measurement periodically, starting measurement when detecting that the communication service quality does not meet the requirements, or starting measurement when predicting that the communication service quality will not meet the requirements in the future.

In the scenario example, the terminal device sets the measurement frequency and performs measurements regularly according to the measurement frequency;

The terminal device starts to perform measurements when it detects that the current communication service quality is insufficient to realize the communication service or the communication service is interrupted;

The terminal device predicts the future communication service quality based on factors such as the movement pattern. For example, if the terminal device moves out of the coverage area of the resident cell, the terminal device performs measurements before leaving the coverage area of the resident cell to avoid communication service interruption.

It should be noted that the reference signal types include but are not limited to: the demodulation reference signal (DMRS) of the current serving physical downlink shared channel (PDSCH), the reference signal associated with the current serving beam, CSI-RS, non-periodic CSI-RS and semi-persistent CSI-RS, or synchronization signal block (SSB).

A feasible implementation method is to perform measurement according to a reference signal to obtain a measurement result, including: performing measurement according to a reference signal within a target time window to obtain a measurement result.

For example, a terminal device measures a reference signal within a certain time window or time range. For example, a reference signal that is S symbols, slots, or other time units away from the scheduled PDSCH (or PDSCH DMRS) can be a reference signal that is S time units before the PDSCH (or PDSCH DMRS) or S time units after the PDSCH (or PDSCH DMRS).

In this feasible implementation, since the reference signal changes dynamically, the reference signal is measured within a certain time window to avoid the problem of low accuracy of the measurement result caused by excessive changes in the reference signal.

A feasible implementation method is to perform measurement based on a reference signal to obtain a measurement result, including: determining a power offset value; and performing measurement based on the reference signal and the power offset value to obtain a measurement result.

The power offset value is sent by the network device to the terminal device.

Taking a scenario example, network equipment configures a power offset between each reference signal and a specific reference signal (such as PDSCH DMRS) for the terminal device to help the terminal eliminate the impact of transmit power. For example, if the transmit power of a periodic Channel State Information Reference Signal (CSI-RS) is K times (such as X dB) the transmit power of the PDSCH DMRS, then when the terminal device compares the Signal to Interference plus Noise Ratio (SINR) of the PDSCH DMRS and CSI-RS, it subtracts X dB from the SINR corresponding to the CSI-RS and then compares it with the SINR of the PDSCH DMRS to determine which reference signal has the better SINR.

In this feasible implementation, the measurement result is corrected by the offset value to improve the accuracy of the measurement result.

S202: Send target content, where the target content includes at least one of the following: the measurement result, a handover notification, or a handover request, where the handover notification includes the first information, and the handover request includes the first information.

The present disclosure uses the switching TRP scenario as an example, and the present disclosure does not limit the specific switching scenario. A switching notification or switching request is sent to a network device, and the network device can be used to perform the switching or notify the target TRP of the switching.

In a feasible implementation manner, the method further includes: determining whether the measurement result meets a first condition; if the measurement result meets the first condition, sending a switching notification or sending a switching request; wherein the first condition is at least one of the following: the measurement scale of the target reference signal is greater than the measurement scale of the current reference signal, or the measurement scale of the target reference signal is within a first range, or the difference between the measurement scale of the target reference signal and the measurement scale of the current reference signal is within a second range.

Taking the scenario example as an example, if the signal quality of other TRPs is better than the signal quality of one or more TRPs in the current TRP set, a switching notification or switching request needs to be sent to ensure the normal execution of the communication service of the terminal device.

In some embodiments, the first condition is at least one of the following: the measurement scale of the target reference signal is greater than the measurement scale of the current reference signal, or the measurement scale of the target reference signal is within a first range, or the difference between the measurement scales of the target reference signal and the current reference signal is within a second range.

It should be noted that the measurement scale includes but is not limited to: Physical layer Radio Signal Received Power (L1-RSRP), SINR, Channel Quality Indicator (CQI) or (Signal to Leakage plus Noise Ratio, SLNR).

Next, various judgment methods for the first condition are exemplified.

Exemplarily, there is at least one target reference signal whose quality of the measurement metric exceeds a preset value.

Taking the scenario example as an example, if the measurement scale of a target reference signal exceeds a preset value, it means that the TRP corresponding to the target reference signal can provide high-quality communication service quality.

Exemplarily, there is at least one target reference signal whose measurement scale is better than the measurement scale corresponding to the reference signal associated with the current PDSCH DMRS or current transmission configuration indication (TCI) state of the terminal device.

For example, if the measurement scale of the target reference signal is better than the measurement scale of the current reference signal, the quality of the communication service can be improved after performing TRP switching.

Exemplarily, there is a difference between the measurement scale of at least one target reference signal and the measurement scale corresponding to the reference signal associated with the current PDSCH DMRS or current TCI state of the terminal device that is greater than a preset value.

For example, if the measurement scale of the target reference signal is better than the measurement scale of the current reference signal, the quality of the communication service can be improved after performing TRP switching compared to the current communication service.

Exemplarily, there is a joint measurement scale of multiple target reference signals that is better than the measurement scale corresponding to the reference signal associated with the current PDSCH DMRS or current TCI state of the terminal device.

Taking the scenario example as an example, if there are multiple target reference signals whose joint measurement scale is better than the measurement scale of the current reference signal, the TRPs corresponding to the multiple target reference signals are switched to provide communication services at the same time.

Exemplarily, the difference between the joint measurement scale of multiple target reference signals and the measurement scale corresponding to the reference signal associated with the current PDSCH DMRS or current TCI state of the terminal device is greater than a preset value.

Taking the scenario example as an example, if the difference between the joint measurement scale of multiple target reference signals and the measurement scale of the current reference signal is greater than the preset value, it means that the quality of the communication services provided simultaneously by the TRPs corresponding to multiple target reference signals is significantly improved compared to the current service quality.

It should be noted that the present disclosure does not limit the judgment method of the first condition.

In this feasible implementation, by using multiple judgment methods of the first condition, it is possible to judge whether to perform the switch from multiple dimensions, thereby improving the accuracy of the judgment.

The measurement reporting is described below with reference to FIG3 .

Figure 3 is a schematic diagram of measurement reporting provided by an embodiment of the present disclosure. As shown in Figure 3, a terminal device directly initiates a measurement, generates measurement results, and sends a handover notification or handover request to a network device. It will be appreciated that directly initiating a measurement by the terminal device allows for immediate measurement execution, thereby improving measurement efficiency.

In some embodiments, sending a switching notification or a switching request based on the first information and/or the second information includes: performing switching based on the first information and/or the second information, and sending a switching notification, the switching notification includes the first information and/or the second information; or, sending a switching request, the switching request includes the first information and/or the second information.

In this scenario example, after determining the measurement results, a decision is made based on the capabilities of the terminal device to perform or not perform a handover. If the terminal device has the handover capability, the terminal device performs the handover. If the terminal device does not have the handover capability, a handover request is sent to the network device, causing the network device to perform the handover.

The measurement reporting is described below with reference to FIG4 .

Figure 4 is a schematic diagram of measurement reporting provided by an embodiment of the present disclosure. As shown in Figure 4, based on Figure 3, the terminal device determines the first information and/or the second information, and sends a handover notification or handover request to the network device based on the first information and/or the second information.

Specifically, in a feasible implementation, the first information includes at least one of the following: a current index value or a target index value, the current index value is used to identify the source of the current reference signal, and the target index value is used to identify the source of the target reference signal.

The determination of whether the measurement result satisfies the first condition is used to determine whether a handover notification or a handover request needs to be sent. The second information is information related to the handover.

The index value corresponds one-to-one with a TRP. The index value serves as a TRP identifier and is used to identify any TRP from multiple TRPs. Each target reference signal has a unique target index value. The number of streams refers to the number of communication channels used for data transmission and determines the ability to simultaneously process and transmit data. The greater the number of streams, the greater the amount of data that can be processed and transmitted simultaneously, resulting in higher transmission speeds and processing efficiency.

In conjunction with the scenario example, the target index value is the index value corresponding to the target TRP, and the communication service of the target TRP is better than the current communication service. The current index value is the index value corresponding to the current TRP. The quality of communication service transmitted through the target transmission mode is better than the current transmission mode. The correspondence between the target transmission mode and the number of streams is, for example, 1-4 streams correspond to one target transmission mode, and 5-8 streams correspond to another target transmission mode. The correspondence between the target index value and the number of streams is, for example, 1-4 streams are transmitted through the TRP corresponding to index value 2 and index value 3, and 5-8 streams are transmitted through the TRP corresponding to index value 3, where index value 2 and index value 3 are target index values. The correspondence between the target index value and the target transmission mode is, for example, when transmission is performed through the TRP corresponding to index value 1 and index value 4, the transmission mode adopted is target transmission mode 1, where index value 1 and index value 4 are target index values.

Specifically, in a feasible implementation method, the reference signal includes at least one of the following: a demodulation reference signal DMRS of a physical uplink shared channel PDSCH, a channel state information reference signal CSI-RS, or a synchronization signal block SSB; the method also includes: determining the first information associated with the reference signal according to the configuration of the reference signal.

In combination with the scenario example, the terminal device obtains the index value through signaling.

A feasible implementation method is that the way in which the DMRS of PDSCH indicates the first information includes at least one of the following: indicating the first information through a sequence configured by high-level parameters; indicating the first information through downlink control information DCI; indicating the first information through the beam state of the DMRS of PDSCH.

For example, the sequence of high-level parameter configuration carries an index value. When configuring PDSCH DMRS, an antenna port of DMRS or a code division multiplexing (CDM) group can be configured with a sequence initialization parameter, and each parameter can be associated with an index value.

For example, the index value is dynamically indicated in the DCI signaling. Unlike the high-level parameter configuration, the index value associated with each DMRS port or DMRS CDM group can be dynamically changed through DCI signaling. For example, a new DCI information field can be used to indicate the index value associated with each CDM group. For example, the antenna port indication field indicates a total of 2 CDM groups, and the index value indication field indicates that the 2 indicated CDM groups are associated with index values 3 and 2, respectively. The antenna port indication field and the index value indication field need to be jointly interpreted, and the two information fields can also be jointly encoded.

For example, the PDSCH DMRS beam state is associated with an index value. Since the PDSCH DMRS needs to indicate the corresponding beam (such as the TCI state or other beam indication method), the index value corresponding to the PDSCH DMRS can be changed through beam indication. For example, each TCI state can be associated with an index value (configured through higher-layer parameters), or the TCI state can be indicated while using the same information field or another information field to indicate the index values corresponding to one or more TCI states.

Exemplarily, it can also be a combination of the above methods. For example, when configuring PDSCH DMRS, an antenna port of DMRS or a CDM group can be configured with a sequence initialization parameter, each parameter can be associated with an index value, and then the network device uses DCI signaling to indicate one of the sequence initialization parameters, which is equivalent to indicating an index value.

Specifically, in a feasible implementation, the target transmission mode includes at least one of the following: correlated joint transmission CJT, space division multiplexing transmission SDM, time division multiplexing transmission TDM, frequency division multiplexing transmission FDM, single frequency network transmission SFN, or dynamic point selection DPS.

Among them, for the scenario of multiple target TRPs, the collaborative transmission method of multiple target TRPs is determined according to the target transmission mode.

In this feasible implementation, multiple target transmission modes are designed to determine a transmission mode with better communication quality.

In a feasible implementation manner, the measurement-based switching method further includes: determining a first set, where the first set includes multiple reference signals; and measuring the multiple reference signals in the first set respectively to determine a target reference signal.

In some embodiments, the index value is an absolute index value or a relative index value.

Among them, the absolute index value is obtained by uniformly numbering all TRPs, and the relative index value is obtained by numbering the TRP corresponding to the reference signal that the terminal device can receive or the reference signal set configured by the network device for the terminal. It can be understood that the absolute index value is for the full amount of TRP, and the number of TRPs involved is large. In order to ensure the uniqueness of the index value, the number of bits of the index value needs to be increased, which will correspondingly increase the bit overhead of the absolute index value. Similarly, using relative index values can reduce bit overhead. For example, the relative index value of the same TRP is 1, and the absolute index value is 192. It can be understood that relative index values can reduce bit overhead.

In conjunction with the scenario example, at least one reference signal is measured to obtain a measurement result. The index values corresponding to the reference signal constitute a first set. The index values are associated with the reference signal, and the index values are associated with the TRP. Each reference signal is associated with at least one index value in the first set. In addition, each port of each reference signal can be associated with an index value in the first set. If there is a target reference signal in the measurement result, the index values corresponding to the target reference signal constitute a second set, and the TRP corresponding to the index values corresponding to the target reference signal is the target TRP. For example, the first set composed of the index values of the reference signal used for measurement is {0, 2, 3, 5, 8, 10}, and the second set is within the range of the first set. The second set can be {0, 2, 8}.

In a feasible implementation manner, the switching method further includes: determining a target index value based on the first information, and receiving a signal associated with the target index value.

Another feasible implementation method is that the switching notification or switching request also includes second information, and the second information is used to identify the target transmission mode, and the second information includes at least one of the following: target transmission mode; the correspondence between the target transmission mode and the number of streams; the correspondence between the target index value and the number of streams; the correspondence between the target index value and the target transmission mode.

In some embodiments, performing switching according to the first information and performing switching according to the second information may be performed simultaneously or only one of them may be performed.

Taking the scenario examples as an example, in scenario one, the quality of the communication service of the current TRP of the terminal device is not sufficient to realize the communication service of the terminal device. It is only necessary to switch to the target TRP corresponding to the target index value received by the terminal device to realize the communication service of the terminal device. In scenario two, the current transmission mode of the terminal device is not sufficient to realize the communication service of the terminal device. It is only necessary to switch the current transmission mode of the current TRP to the target transmission mode without switching the current TRP to realize the communication service of the terminal device. In scenario three, the current TRP and the current transmission mode of the terminal device are not sufficient to realize the communication service of the terminal device. Only switching the current TRP or only switching the current transmission mode still cannot realize the communication service of the terminal device. In this case, it is necessary to switch the current TRP and the target transmission mode.

In this feasible implementation, different switching modes are designed and corresponding switching modes are executed according to actual scenarios, thereby effectively realizing the communication service of the terminal device.

In a feasible implementation method, the network device receives a switching notification, determines a target access device associated with a target index value based on the first information and/or the second information, and sends a switching notification to the target access device.

Next, the switching notification will be described with reference to FIG5 .

Figure 5 is a schematic diagram of a handover notification provided by an embodiment of the present disclosure. As shown in Figure 5, a terminal device directly initiates a measurement, generates measurement results, and sends a handover notification to a network device. Based on the handover notification, the terminal device determines a target access device and sends a handover notification to the target access device, thereby assisting the terminal device in completing the handover.

In another feasible implementation, the network device receives a switching request, and the network device determines a target access device associated with a target index value based on the first information and/or the second information, and performs switching.

Taking the scenario example as an example, for a scenario where the terminal device does not have a switching function, the network device performs TRP switching according to the switching request and sends the switching result to the terminal device.

In another feasible implementation manner, the network device sends response information, where the response information indicates that the network device has received the measurement result.

In some embodiments, the method of sending the corresponding information includes but is not limited to at least one of the following: sending ACK; sending a response MAC-CE, containing specific information, such as a changed index value, or a predetermined hybrid automatic repeat request error correction protocol (Hybrid Automatic Repeat Request, referred to as HARQ) process number, etc.; sending DCI signaling encrypted with a specific radio network temporary identifier (Radio Network Temporary Identifier, referred to as RNTI) value; sending DCI signaling in a specific search space (or control resource set); using the same HARQ process number as when the terminal device sends the notification/request, but flipping the new data indication field to schedule PUSCH for transmission.

In some embodiments, if the network device fails to perform data transmission, corresponding feedback information is sent to the terminal device.

In this feasible implementation, the network device sends a response message, so that the terminal device knows that the network device has received the measurement result, thereby avoiding the terminal device waiting for a long time and affecting other functions of the terminal device.

An example of the overall solution for measurement-based switching is given below:

Step 1: Measure the link quality of the channel corresponding to the current TRP and the link quality of the channels corresponding to other TRPs based on reference signals. For example, a terminal device can measure the reference signals sent by up to N TRPs, where the N TRPs can be serving or non-serving. Furthermore, the N TRPs can belong to the same cell or different cells. The N TRPs can be determined by the terminal device, for example, by performing preliminary measurements based on the SSBs sent by multiple TRPs to determine the N TRPs. Alternatively, the N TRPs can be determined by the network device, for example, by configuring N TRPs suitable for serving or measurement based on the terminal device's specific location. To ensure that the terminal device can measure both serving and non-serving TRPs, and that the measurement results are used to make TRP switching decisions, all downlink reference signals are associated with a TRP index, cell index, or resource index. For example, a TRP index, cell index, or resource index is assigned to each SSB, CSI-RS, TRS, PDSCH DMRS, PDCCH DMRS, or PBCH DMRS. Since the downlink signal is sent by the network device, the correspondence between the downlink reference signal and the TRP or cell is determined by the network device.

Specifically, the terminal device measures the reference signal associated with the index value in the first set to determine the index value used for transmission (i.e., determine the second set). The index values contained in the first set and the second set can be either absolute index values or relative index values. The index values in the first set and the second set are configured by the network device or updated by the terminal device. After determining the first set, all reference signals are associated with at least one index value in the first set. For example, the terminal device can at least measure the SSB resources sent by the TRP in the first set,

Exemplarily, the TRP index value, SSB index value, or resource index value may be a relative index value or an absolute index value, which is not limited in this disclosure. When the TRP index value is a relative index value, the configuration or indication overhead of the TRP index value or cell index value may be reduced. However, when the first set changes, the network device should update the first set for the terminal device, or the terminal device should indicate the new first set to the network device.

Specifically, the network device or the terminal device indicates the absolute index value corresponding to the relative cell index value or the TRP index value or the resource index value in the first set. For example, when N=4, the relative index values in the first set are as follows:

For another example, the network device or terminal device indicates to the other side only the absolute index value corresponding to the relative cell index value or TRP index value or resource index value that has changed in the first set. For example, when N=4, the changed relative index value in the first set is as follows:

After determining the measurement set, all reference signals are associated with at least one index value in the measurement set. For example, the terminal device may at least measure the SSB resources transmitted by the TRP in the measurement set. In some embodiments, the terminal device may also measure the CSI-RS transmitted by the TRP in the measurement set.

In addition, the current serving cell or serving TRP forms a second set, which is a subset of the first set and contains some index values in the first set. For example, if the first set contains index values {0, 2, 3, 5, 8, 10}, the second set contains index values {0, 2, 8}. During measurement, each measurement resource is associated with at least one index value in the first set (absolute index value, relative index value, physical cell ID, TRP ID, etc.). In addition, each port of each measurement resource can be associated with an index value in the first set.

In some embodiments, the terminal device may also measure the CSI-RS sent by the TRP in the first set. An index value is associated in the reference signal configuration, and the reference signal includes but is not limited to at least one of the following: DMRS of the currently serving PDSCH; a reference signal associated with the current serving beam (TCI state or QCL parameter); RS in a specific reference signal set (such as configured by high-level parameters); periodic CSI-RS, non-periodic CSI-RS and semi-persistent CSI-RS sent by all TRPs; SSB sent by all TRPs. The method of carrying an index value in PDSCH DMRS includes but is not limited to at least one of the following: carrying an index value in a sequence configured by high-level parameters. When configuring PDSCH DMRS, an antenna port or a CDM group of DMRS can be configured with a sequence initialization parameter, and each parameter can be associated with an index value; for example, the specific configuration is as follows:
scramblingID_port0 INTEGER(0..65535)
associated index0 INTEGER(0..5)
scramblingID_port1 INTEGER(0..65535)
associated index1 INTEGER(0..5)
…
scramblingID_port23 INTEGER(0..65535)
associated index23 INTEGER(0..5)

Or,
scramblingID_CDMgroup0 INTEGER(0..65535)
associated index0 INTEGER(0..5)
scramblingID_CDMgroup1 INTEGER(0..65535)
associated index1 INTEGER(0..5)
scramblingID_CDMgroup2 INTEGER(0..65535)
associated index2 INTEGER(0..5)

The index value is dynamically indicated in DCI signaling. Unlike high-level parameter configuration, the index value associated with each DMRS port or DMRS CDM group can be dynamically changed through DCI signaling. For example, a new DCI information field can be used to indicate the index value associated with each CDM group. For example, the antenna port indication field indicates a total of 2 CDM groups, and the index value indication field indicates that the 2 indicated CDM groups are associated with index values 3 and 2 respectively. The antenna port indication field and the index value indication field need to be jointly interpreted, and the two information fields can also be jointly encoded;

The PDSCH DMRS beam state is associated with an index value. Because the PDSCH DMRS needs to indicate the corresponding beam (e.g., TCI state or other beam indication methods), the index value associated with the PDSCH DMRS can be changed through beam indication. For example, each TCI state can be associated with an index value (configured via higher-layer parameters), or the TCI state can be indicated while using the same information field or a separate information field to indicate the index values corresponding to one or more TCI states.

In some embodiments, the terminal device measures a reference signal within a certain time range (time window) to determine whether to perform TRP switching. For example, a reference signal that is S symbols, time slots, or other time units away from the scheduled PDSCH (or PDSCH DMRS) can be a reference signal that is S time units before the PDSCH (or PDSCH DMRS) or S time units after the PDSCH (or PDSCH DMRS).

In some embodiments, the network device configures a power offset between each reference signal and a specific reference signal (such as a PDSCH DMRS) for the terminal device to facilitate the terminal device to remove the impact of transmit power. For example, if the transmit power of a CSI-RS is K times (such as XdB) the transmit power of the PDSCH DMRS, then when the terminal device compares the SINR of the PDSCH DMRS and the CSI-RS, it subtracts XdB from the SINR corresponding to the CSI-RS and then compares it with the SINR of the PDSCH DMRS to determine which reference signal has a better SINR. This will result in a more accurate calculated value. When performing measurements, the terminal device can measure multiple reference signals corresponding to a TRP or cell, such as RS 3 and RS 5 corresponding to a cell index value, a TRP index value, or index value 3, to determine whether the cell or TRP has a more optimal beam. It can also measure reference signals corresponding to different cells or TRPs to determine whether the serving cell or TRP needs to be changed.

Step 2: The terminal device determines whether to switch the TRP or reference signal based on the measurement result. When the measurement result meets at least one of the following conditions, the terminal device determines to change the TRP or reference signal: at least one measurement scale of at least one reference signal, such as L1-RSRP, L1-SINR, CQI (SINR), SLNR, etc., is better than the measurement scale corresponding to the current PDSCH DMRS (or the reference signal associated with the current TCI state); at least one joint measurement scale of the reference signal and PDSCH DMRS (or the reference signal associated with the current TCI state), such as L1-RSRP, L1-SINR, CQI (SINR), SLNR, etc., is better than the measurement scale corresponding to the current PDSCH DMRS (or the reference signal associated with the current TCI state); for example, using CQI (SINR) as the measurement scale, when the CSI-RS ID When 5 has 32 ports, if the PDSCH DMRS has 8 layers, a potential precoding matrix can be calculated based on CSI-RS ID 5 (assuming it corresponds to 4 layers). According to the channel information corresponding to CSI-RS ID 5, the calculated precoding matrix and the current PDSCH DMRS, the CQI (SINR) corresponding to 4 streams (assuming that the TRP corresponding to CSI-RS ID 5 and the current serving TRP are CJT transmitted), 8 streams (assuming that the TRP corresponding to CSI-RS ID 5 and the current serving TRP are CJT transmitted with 4 streams, and the current serving TRP is 4 streams transmitted) or 12 streams (assuming that the TRP corresponding to CSI-RS ID 5 and the current serving TRP are NCJT transmitted) is jointly determined. If at least one transmission hypothesis is better than the current one, If the CQI corresponding to the previous PDSCH DMRS transmission is not found, the terminal device determines to replace the service/collaboration TRP or reference signal; the difference between at least one measurement scale of at least one reference signal, such as L1-RSRP, L1-SINR, CQI (SINR), SLNR, etc. and the measurement scale corresponding to the current PDSCH DMRS (or the reference signal associated with the current TCI state) is better than a certain threshold; the specific threshold can be positive or negative. When the threshold value is positive, it means that the measurement result of at least one measurement reference signal is better than the measurement result of the reference signal corresponding to the current TRP. When the threshold value is negative, it can be said that the measurement result of at least one measurement reference signal is comparable to the measurement result corresponding to the current TRP. Therefore, the TRP corresponding to at least one measurement reference signal can be replaced. RP is also regarded as a collaborative TRP, otherwise serious interference will be introduced; the difference between the joint measurement scale of at least one reference signal and PDSCH DMRS (or the reference signal associated with the current TCI state), such as L1-RSRP, L1-SINR, CQI (SINR), SLNR, etc. and the measurement scale corresponding to the current PDSCH DMRS (or the reference signal associated with the current TCI state) is better than a specific threshold; the measurement scale corresponding to the current PDSCH DMRS (or the reference signal associated with the current TCI state) is worse than a specific threshold; at least one measurement scale of at least one reference signal (such as leaked interference) is worse than a specific threshold; in this case, the reference signal can be transmitted jointly with the current collaborative TRP without leaking more interference to other users.

In some embodiments, whether to switch the TRP or reference signal is determined based on whether the measurement result satisfies a first condition. To avoid inaccurate single-shot measurements or a ping-pong effect, a predetermined measurement scale can be used to satisfy the condition K times (e.g., 5 times, 10 times, etc.) before the terminal device determines to switch the TRP or reference signal. The ping-pong effect occurs when the signal strength of two TRPs fluctuates drastically, causing the terminal device to frequently switch between the two TRPs.

It should be noted that the present disclosure does not limit the specific types of the above conditions.

Step 3: If the terminal device determines to switch the TRP or reference signal, it sends a switching notification or a switching request to the network device. In some embodiments, the signal or channel through which the terminal device sends the switching notification or the switching request includes, but is not limited to, at least one of the following: a PRACH channel, a scheduling request (SR), MAC-CE signaling, or a cell-specific physical uplink shared channel (CG PUSCH). The information carried by the channel or signal includes the first information and/or the second information.

Specifically, the first information includes but is not limited to at least one of the following: the index value that needs to be replaced, i.e., the current index value, or the index value corresponding to the new TRP, i.e., the target index value. For example, there are currently two TRPs serving the terminal device, namely, index value 0 and index value 4. The transmission quality of the TRP corresponding to index value 0 meets the basic requirements and continues to serve the terminal device. The quality of the TRP corresponding to index value 4 deteriorates and no longer serves the terminal device. The terminal device then instructs to replace index value 4, i.e., no longer uses the reference signal corresponding to index value 4 to serve the terminal device. The terminal device is currently served by index value 0 and index value 4. Through measurement, the terminal determines that the TRP corresponding to index value 4 and index value 5 serve the terminal. Therefore, the terminal can report index value 4 and index value 5 to the network device, notifying/requesting the network side to use index value 4 and index value 5 to serve the terminal device. The second information includes but is not limited to at least one of the following: a new transmission mode (such as CJT, DPS, NCJT, CJT+NCJT, etc.); the number of streams corresponding to the new transmission mode (CJT transmission uses 1-4 streams, and DPS transmission uses 5-8 streams); the transmission mode corresponding to the number of streams (such as 1-4 streams for CJT transmission, and 5-8 streams for DPS transmission); the index value corresponding to the number of streams (such as 1-4 streams use TRPs corresponding to index values 3 and 2 for transmission, and 5-8 streams use TRPs corresponding to index value 3 for transmission); the index value corresponding to the transmission mode (such as using TRPs corresponding to index values 0 and 4 for CJT transmission); an event that triggers the terminal device to initiate a TRP switching notification or switching request.

Step 4: After the network device receives the switching notification or the preset duration of the switching request, it executes the switching or sends the switching notification to the target TRP. After the network device completes the switching or completes sending the switching notification to the target TRP, it sends a response message to the terminal device or does not send a response message. If the terminal device expects the PDSCH DMRS to carry a TRP index value or a cell index value, if after T time units, or after T time units and before T1 time units, the TRP index value or cell index value carried in the PUSCH DMRS (or the reference signal associated with the TCI state of the PDSCH) received by the mid-end device is not sent by the terminal device, the terminal device sends the switching notification or switching request again through step 3 to ensure the accuracy of the switching.

In some embodiments, the method of sending response information includes but is not limited to at least one of the following: the network device sends an ACK to the terminal device; the network device sends a response MAC-CE to the terminal device, which contains specific information, such as a changed index value, or an agreed HARQ process number, etc.; the network device sends DCI signaling encrypted with a specific RNTI (value) to the terminal device; the network device sends DCI signaling to the terminal device in a specific search space (or control resource set); the network device uses the same HARQ process number as the terminal device when sending the notification/request, but the flipped new data indication field schedules PUSCH for transmission.

If the network device fails to execute the handover notification or handover request, the network device sends a response message. In some embodiments, if the network device fails to execute the handover notification or handover request, the response message indicates that the target TRP fails to provide communication services. The network device specifies the TRP (or index value) that cannot provide services to the terminal device through the response message, such as the cell index value or TRP index value or index value that cannot provide services carried in the DCI, or the index value that cannot provide services carried in the MAC-CE.

FIG6 is a schematic diagram of the structure of a measurement-based switching device provided by an embodiment of the present disclosure. As shown in FIG6 , the measurement-based switching device 60 may include: a measurement module 61, a determination module 62, a first execution module 63, a first receiving module 64 and a collection module 65, wherein:

The measurement module 61 is configured to perform measurement according to a reference signal to obtain a measurement result, wherein the reference signal is associated with first information, and the first information is used to identify a source of the reference signal.

The determination module 62 is configured to send target content, where the target content includes at least one of the following: the measurement result, a switching notification, or a switching request, where the switching notification includes the first information, and the switching request includes the first information.

It should be noted that the measurement-based switching device shown in the embodiment of the present disclosure can implement the technical solution shown in the above method embodiment, and its implementation principles and beneficial effects are similar, which will not be repeated here.

In a possible implementation, the determination module 62 is specifically configured to:

Determining whether the measurement result meets the first condition;

If the measurement result meets the first condition, sending a handover notification or sending a handover request;

The first condition is at least one of the following: a measurement scale of the target reference signal is greater than a measurement scale of the current reference signal, or the measurement scale of the target reference signal is within a first range, or a difference between the measurement scales of the target reference signal and the current reference signal is within a second range.

The first execution module 63 is configured to:

Based on the first information, determine the target index value and receive the signal associated with the target index value; and/or, based on the second information, determine the target transmission mode and receive the signal of the source of the reference signal through the target transmission mode, wherein the second information is used to identify the target transmission mode.

In one possible embodiment, the reference signal includes at least one of the following: a demodulation reference signal DMRS of a physical uplink shared channel PDSCH, a channel state information reference signal CSI-RS, or a synchronization signal block SSB; a first receiving module 64 is used to determine the first information associated with the reference signal according to the configuration of the reference signal.

In one possible implementation, the manner in which the DMRS of the PDSCH indicates the first information includes at least one of the following: indicating the first information through a sequence configured by high-level parameters; indicating the first information through downlink control information DCI; indicating the first information through the beam state of the DMRS of the PDSCH.

The set module 65 is used to determine a first set, which includes multiple reference signals. The set module is also used to measure the multiple reference signals in the first set respectively to determine a target reference signal.

In a possible implementation, the measurement module 61 is specifically configured to:

Measurement is performed based on the reference signal within the target time window to obtain a measurement result.

In a possible implementation, the measurement module 61 is specifically configured to:

Determine the power offset value;

Measurement is performed based on the reference signal and the power offset value to obtain a measurement result.

In one possible embodiment, the switching notification or switching request also includes second information, and the second information is used to identify the target transmission mode, and the second information includes at least one of the following: target transmission mode; the correspondence between the target transmission mode and the number of streams; the correspondence between the target index value and the number of streams; the correspondence between the target index value and the target transmission mode.

In a possible implementation manner, the first information includes at least one of the following: a current index value or a target index value, where the current index value is used to identify a source of the current reference signal, and the target index value is used to identify a source of the target reference signal.

In a possible implementation, the target transmission mode includes at least one of the following: correlated joint transmission (CJT), space division multiplexing (SDM), time division multiplexing (TDM), frequency division multiplexing (FDM), single frequency network (SFN), or dynamic point selection (DPS).

FIG7 is a schematic diagram of the structure of a measurement-based switching device provided by an embodiment of the present disclosure. The measurement-based switching device 70 includes: a second receiving module 71, a forwarding module 72, a second execution module 73, a second sending module 74, a signaling module 75, and a correction module 76, wherein:

The second receiving module 71 is configured to receive target content, where the target content includes at least one of the following: a measurement result, a handover notification, or a handover request.

The forwarding module 72 is configured to determine the target access device associated with the target index value based on the first information and/or the second information; the forwarding module 72 is further configured to send a switching notification to the target access device.

In one possible embodiment, the first information includes at least one of the following: a current index value or a target index value, the current index value is used to identify the source of the current reference signal, and the target index value is used to identify the source of the target reference signal; the second information includes the current transmission mode and at least one of the following: the target transmission mode; the correspondence between the target transmission mode and the number of streams; the correspondence between the target index value and the number of streams; the correspondence between the target index value and the target transmission mode.

In a possible implementation, the forwarding module 72 is further configured to determine a first access device corresponding to the target transmission mode; and the forwarding module is further configured to send a switching notification to the first access device.

The second execution module 73 is used to determine the target access device associated with the target index value according to the first information and/or the second information; the second execution module 73 is also used to perform switching.

In a possible implementation, the second execution module 73 is further configured to:

Determining a first access device associated with the target transmission mode;

The handover is performed to perform a communication service for the terminal device through the target transmission mode.

In a possible implementation, the target transmission mode includes at least one of the following: correlated joint transmission (CJT), space division multiplexing (SDM), time division multiplexing (TDM), frequency division multiplexing (FDM), single frequency network (SFN), or dynamic point selection (DPS).

The second sending module 74 is configured to send a response message, where the response message indicates that the network device has received the measurement result.

The signaling module 75 is configured to send response information via signaling, where the signaling includes at least one of the following: ACK signaling, media access control-control element MAC-CE signaling, or downlink control information DCI signaling.

The correction module 76 is used to send a power offset value, which is used to correct the measurement error.

It should be noted that the division of modules in the embodiments of the present disclosure is illustrative and merely represents a logical functional division. In actual implementation, other division methods may be employed. Furthermore, the modules in the various embodiments of the present disclosure may be integrated into a single processing unit, each unit may exist physically as a separate unit, or two or more modules may be integrated into a single unit. The aforementioned integrated modules may be implemented in either hardware or software functional units.

If the integrated module is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the relevant technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the various embodiments of the present disclosure.

The present disclosure provides a measurement-based switching device for use in a terminal device. FIG8 is a schematic diagram of the structure of the measurement-based switching device provided in the present disclosure. As shown in FIG8 , the measurement-based switching device includes a transceiver 810 , a processor 800 , and a memory 820 .

The transceiver 810 is configured to receive and send data under the control of the processor 800 .

In FIG8 , the bus architecture may include any number of interconnected buses and bridges, specifically various circuits linked together by one or more processors represented by processor 800 and memory represented by memory 820. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 810 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 may store data used by the processor 800 when performing operations.

The processor 800 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor 800 can also adopt a multi-core architecture.

The present disclosure provides a measurement-based switching device for use in network equipment. FIG9 is a schematic diagram of the structure of the measurement-based switching device provided in the present disclosure. As shown in FIG9 , the measurement-based switching device includes a transceiver 910 , a processor 900 , and a memory 920 .

The transceiver 910 is configured to receive and send data under the control of the processor 900 .

In FIG9 , the bus architecture may include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by processor 900 and memory represented by memory 920, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 910 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. For different user devices, the user interface may also be an interface capable of connecting external or internal devices as required, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 900 when performing operations.

In some embodiments, the processor 900 can be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor can also adopt a multi-core architecture.

The processor 900 is configured to execute any method provided by the embodiments of the present disclosure according to the obtained executable instructions by calling the program stored in the memory. The processor 900 and the memory 920 may also be arranged physically separately.

It should be noted here that the above-mentioned device provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (Non-Volatile Memory), solid-state drives (SSDs), etc.).

Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

The present disclosure is described with reference to the flowcharts and/or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and/or box in the flowchart and/or block diagram, as well as the combination of the processes and/or boxes in the flowchart and/or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims (27)

A measurement-based handover method, applied to a terminal, wherein the method comprises: Performing measurement based on a reference signal to obtain a measurement result, wherein the reference signal is associated with first information, and the first information is used to identify a source of the reference signal; Send target content, where the target content includes at least one of the following: the measurement result, a handover notification, or a handover request, where the handover notification includes the first information, and the handover request includes the first information. The method according to claim 1, further comprising: Determining whether the measurement result meets a first condition; If the measurement result meets the first condition, sending a handover notification or sending a handover request; The first condition is at least one of the following: a measurement scale of the target reference signal is greater than a measurement scale of the current reference signal, or the measurement scale of the target reference signal is within a first range, or a difference between the measurement scales of the target reference signal and the current reference signal is within a second range. The method according to claim 1 or 2, wherein the method further comprises: A target index value is determined according to the first information, and a signal associated with the target index value is received. The method according to any one of claims 1 to 3, wherein the reference signal includes at least one of the following: a demodulation reference signal DMRS of a physical downlink shared channel PDSCH, a channel state information reference signal CSI-RS, or a synchronization signal block SSB; the method further comprising: Determine first information associated with the reference signal according to the configuration of the reference signal. The method according to claim 4, wherein the manner in which the DMRS of the PDSCH indicates the first information includes at least one of the following: A sequence indicating first information configured by a high-level parameter; Indicating the first information through downlink control information DCI; The beam status of the DMRS of the PDSCH indicates the first information. The method according to any one of claims 1 to 5, wherein the method further comprises: determining a first set comprising a plurality of reference signals; Multiple reference signals in the first set are measured respectively to determine a target reference signal. The method according to claim 1, wherein performing measurement based on the reference signal to obtain the measurement result comprises: Measurement is performed according to the reference signal within the target time window to obtain the measurement result. The method according to claim 1, wherein performing measurement based on the reference signal to obtain the measurement result comprises: Determine the power offset value; Measurement is performed according to the reference signal and the power offset value to obtain the measurement result. The method according to any one of claims 1 to 8, wherein the handover notification or handover request further includes second information, the second information being used to identify the target transmission mode, and the second information including at least one of the following: Target transmission mode; The correspondence between the target transmission mode and the number of flows; The correspondence between the target index value and the number of flows; The correspondence between the target index value and the target transmission mode. The method according to claim 9, wherein the first information includes at least one of the following: a current index value or a target index value, the current index value is used to identify the source of the current reference signal, and the target index value is used to identify the source of the target reference signal. The method according to claim 10, wherein the target transmission mode includes at least one of the following: correlated joint transmission (CJT), space division multiplexing (SDM), time division multiplexing (TDM), frequency division multiplexing (FDM), single frequency network (SFN), or dynamic point selection (DPS). A measurement-based switching method, applied to a network device, comprising: Target content is received, where the target content includes at least one of the following: a measurement result, a handover notification, or a handover request. The method according to claim 12, wherein the switching notification includes the first information and/or the second information; the method further comprising: Determine, according to the first information and/or the second information, a target access device associated with the target index value; Send the switching notification to the target access device. The method according to claim 13, wherein the first information includes at least one of the following: a current index value or a target index value, the current index value being used to identify the source of the current reference signal, and the target index value being used to identify the source of the target reference signal; The second information includes a current transmission mode and at least one of the following: Target transmission mode; The correspondence between the target transmission mode and the number of flows; The correspondence between the target index value and the number of flows; The correspondence between the target index value and the target transmission mode. The method according to claim 14, wherein the method further comprises: Determining a first access device associated with the target transmission mode; Send the switching notification to the first access device. The method according to claim 12, wherein the handover request includes the first information and/or the second information; the method further comprising: Determine, according to the first information and/or the second information, a target access device associated with the target index value; Perform the switch. The method according to claim 16, wherein the method further comprises: Determining a first access device associated with the target transmission mode; The handover is performed to perform a communication service for the terminal device through the target transmission mode. The method according to claim 17, wherein the target transmission mode includes at least one of the following: correlated joint transmission (CJT), space division multiplexing (SDM), time division multiplexing (TDM), frequency division multiplexing (FDM), single frequency network (SFN), or dynamic point selection (DPS). The method according to claim 12, wherein the method further comprises: Sending response information, where the response information indicates that the network device has received the measurement result. The method according to any one of claims 12 to 19, further comprising: The response information is sent through signaling, where the signaling includes at least one of the following: ACK signaling, media access control-element MAC-CE signaling, or downlink control information DCI signaling. The method according to any one of claims 12 to 20, wherein the method further comprises: A power offset value is sent, where the power offset value is used to correct measurement errors. A measurement-based switching device, comprising: a measurement module, configured to perform measurement based on a reference signal to obtain a measurement result, wherein the reference signal is associated with first information, and the first information is used to identify a source of the reference signal; The determination module is configured to send target content, where the target content includes at least one of the following: the measurement result, a switching notification, or a switching request, where the switching notification includes the first information, and the switching request includes the first information. A measurement-based switching device, wherein the device comprises: The second receiving module is configured to receive target content, where the target content includes at least one of the following: a measurement result, a handover notification, or a handover request. A measurement-based switching device, comprising a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Performing measurement based on a reference signal to obtain a measurement result, wherein the reference signal is associated with first information, and the first information is used to identify a source of the reference signal; Send target content, where the target content includes at least one of the following: the measurement result, a handover notification, or a handover request, where the handover notification includes the first information, and the handover request includes the first information. The apparatus according to claim 24, wherein the processor is configured to: Determining whether the measurement result meets a first condition; If the measurement result meets the first condition, sending a handover notification or sending a handover request; The first condition is at least one of the following: a measurement scale of the target reference signal is greater than a measurement scale of the current reference signal, or the measurement scale of the target reference signal is within a first range, or a difference between the measurement scales of the target reference signal and the current reference signal is within a second range. A measurement-based switching device, comprising a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Target content is received, where the target content includes at least one of the following: a measurement result, a handover notification, or a handover request. A non-transitory readable storage medium, wherein the non-transitory readable storage medium stores a computer program, wherein the computer program is used to cause a processor to execute the method according to any one of claims 1 to 21.