WO2025000515A1 - Uplink communication method, terminal, network device, and storage medium - Google Patents

Abstract

The present disclosure relates to an uplink communication method, a terminal, a network device, and a storage medium. The uplink communication method comprises: receiving first information, the first information being used for indicating a codeword used for uplink communication; and on the basis of the codeword, sending at least one of an uplink reference signal and an uplink channel. In the present disclosure, the codeword used for the uplink communication can be quickly indicated by means of the first information, and the uplink communication is performed on the basis of the codeword, so that uplink communication efficiency is improved.

Description

Uplink communication method, terminal, network device and storage medium Technical Field

The present disclosure relates to the field of communication technology, and in particular to an uplink communication method, a terminal, a network device, and a storage medium.

Background Art

In the related art, a study on the enhancement of multiple-input multiple-output (MIMO) uplink 8-port communication was conducted. Fully coherent codewords, partially coherent codewords, and incoherent codewords were discussed. At the same time, the antenna port group in the terminal was also discussed. Among them, the antennas in the same antenna port group perform fully coherent transmission, and the antennas between different antenna port groups perform incoherent transmission.

Summary of the invention

At present, based on the 2-antenna port and 4-antenna port codebooks specified in the protocol and the 8-antenna port partially coherent codebook generation method discussed in the conference progress, the number of codewords in the determined 8-antenna port partially coherent codebook is too large, resulting in the need for more bits for indication, thereby causing more resource consumption.

The embodiments of the present disclosure provide an uplink communication method, a terminal, a network device, and a storage medium.

According to a first aspect of an embodiment of the present disclosure, an uplink communication method is proposed, the method comprising: receiving first information, the first information being used to indicate a codeword used for uplink communication; and sending at least one of an uplink reference signal and an uplink channel based on the codeword.

According to the second aspect of an embodiment of the present disclosure, an uplink communication method is proposed, the method comprising: sending first information, the first information being used to indicate a codeword used for uplink communication; receiving at least one of an uplink reference signal and an uplink channel, at least one of the uplink reference signal and the uplink channel being sent based on the codeword.

According to the third aspect of an embodiment of the present disclosure, an uplink communication method is proposed, the method comprising: a network device sends first information to a terminal, the first information being used to indicate a codeword used for uplink communication; the terminal receives the first information; the terminal sends at least one of an uplink reference signal and an uplink channel based on the codeword; the network device receives at least one of an uplink reference signal and an uplink channel.

According to the fourth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: a transceiver module; the transceiver module is used to receive first information, the first information is used to indicate a codeword used for uplink communication; the transceiver module is also used to send at least one of an uplink reference signal and an uplink channel based on the codeword.

According to the fifth aspect of an embodiment of the present disclosure, a network device is proposed, comprising: a transceiver module; the transceiver module is used to send first information, the first information is used to indicate a codeword used for uplink communication; the transceiver module is also used to receive at least one of an uplink reference signal and an uplink channel, and at least one of the uplink reference signal and the uplink channel is sent based on the codeword.

According to a sixth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; wherein the terminal is used to execute the first aspect and any one of the uplink communication methods in the first aspect.

According to a seventh aspect of an embodiment of the present disclosure, a network device is proposed, comprising: one or more processors; wherein the network device is used to execute the second aspect and any one of the uplink communication methods in the second aspect.

According to the eighth aspect of an embodiment of the present disclosure, a communication system is proposed, characterized in that it includes a terminal and a network device, wherein the terminal is configured to implement the first aspect and any one of the uplink communication methods in the first aspect, and the network device is configured to implement the second aspect and any one of the uplink communication methods in the second aspect.

According to the ninth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes an uplink communication method such as the first aspect and any one of the first aspect or the second aspect and any one of the second aspect.

The present disclosure can quickly indicate the codeword used for uplink communication through the first information, and perform uplink communication based on the codeword, thereby improving the efficiency of uplink communication.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for describing the embodiments are introduced below. The following drawings are only some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

FIG1 is a schematic diagram of a communication system architecture according to an embodiment of the present disclosure.

FIG2 is a schematic diagram of an interaction of an uplink communication method according to an embodiment of the present disclosure.

Fig. 3a is a flow chart of an uplink communication method according to an exemplary embodiment.

Fig. 3b is a flow chart of another uplink communication method according to an exemplary embodiment.

Fig. 4 is a flow chart of yet another uplink communication method according to an exemplary embodiment.

Fig. 5 is a flow chart of yet another uplink communication method according to an exemplary embodiment.

Fig. 6a is a schematic diagram of an uplink communication device according to an exemplary embodiment.

Fig. 6b is a schematic diagram of another uplink communication device according to an exemplary embodiment.

Fig. 7a is a schematic diagram of a communication device according to an exemplary embodiment.

Fig. 7b is a schematic diagram of a chip according to an exemplary embodiment.

DETAILED DESCRIPTION

The embodiments of the present disclosure provide an uplink communication method, a terminal, a network device, and a storage medium.

In a first aspect, an embodiment of the present disclosure proposes an uplink communication method, the method comprising: receiving first information, the first information being used to indicate a codeword used for uplink communication; and sending at least one of an uplink reference signal and an uplink channel based on the codeword.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

In combination with some embodiments of the first aspect, the first information is used to indicate a sending rank indication TRI and a sending precoding matrix indication TPMI, TRI is used to indicate the number of transmission layers, TPMI is used to indicate the precoding matrix, and the number of transmission layers and the precoding matrix are used to jointly indicate a codeword.

In the above embodiment, TRI and TPMI are used jointly to indicate the codewords used in uplink communication, so that the corresponding codewords can be indicated quickly and accurately, thereby improving the uplink communication efficiency.

In combination with some embodiments of the first aspect, the number of transmission layers and the precoding matrix jointly indicate a codeword, including: determining a pre-configured first number of first codebooks based on an antenna port division method of the terminal, wherein the first number of first codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the number of codewords in the first number of first codebooks is less than or equal to a first threshold; determining a target codebook from the first number of first codebooks according to TRI; and determining a codeword based on TPMI and the target codebook.

In the above embodiment, the codeword is determined from a part of the codebook with a smaller number of codewords, so that less bits of first information can be used, thereby reducing resource consumption.

In combination with some embodiments of the first aspect, the first codebook is preconfigured in the following manner: based on the antenna port division method of the terminal, determining a preconfigured first number of second codebooks, wherein the first number of second codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the codeword in the second codebook is less than or equal to the codeword in the third codebook corresponding to the same number of transmission layers, and the third codebook is a codebook specified by the protocol; and determining the first codebook based on one or more second codebooks.

In the above embodiment, a new codebook is formed by extracting some codewords from the codebook specified by the protocol, thereby obtaining a codebook with fewer codewords. Fewer bits of first information can be used, thereby reducing resource consumption.

In combination with some embodiments of the first aspect, the second codebook is composed of some codewords in the third codebook; the second codebook is preconfigured in at least one of the following ways: selecting a second number of codewords from the third codebook according to a first preset order to form the second codebook, wherein the first preset order is determined by the cosine similarity between different codewords in the third codebook; selecting a second number of codewords from the third codebook based on a first parameter and a second parameter to form the second codebook, wherein the first parameter and the second parameter are parameters required to determine the codeword during downlink communication; selecting a second number of codewords from the third codebook according to a second preset order to form the second codebook, wherein the second preset order is the order in which the codewords in the third codebook are arranged; selecting the 2X-1th codeword in the third codebook to form the second codebook, wherein X is a positive integer; selecting the 2Xth codeword in the third codebook to form the second codebook.

In the above embodiments, a plurality of ways of constructing a codebook with a small number of codewords are provided to be applicable to a variety of scenarios and improve universality.

In combination with some embodiments of the first aspect, the number of codewords in the second codebook corresponding to each number of transmission layers is determined based on a preset rule.

In the above embodiment, the number of codewords in the second codebook is preconfigured, thereby determining a codebook with fewer codewords, so as to use first information with fewer bits, thereby reducing resource consumption.

In combination with some embodiments of the first aspect, the antenna port division method includes at least one of the following methods: dividing into 1 antenna port group, each antenna port group has 8 antenna ports; dividing into 2 antenna port groups, each antenna port group has 4 antenna ports; dividing into 4 antenna port groups, each antenna port group has 2 antenna ports; dividing into 8 antenna port groups, each antenna port group has 1 antenna port.

In the above embodiment, a variety of antenna port division schemes are applicable, so that a codebook with a smaller number of codewords can be used for uplink communication in different scenarios, thereby reducing resource consumption.

According to a second aspect of an embodiment of the present disclosure, an uplink communication method is provided, the method comprising: sending first information, the first information being used to indicate a codeword used for uplink communication; receiving at least one of an uplink reference signal and an uplink channel, at least one of the uplink reference signal and the uplink channel being sent based on the codeword.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

In combination with some embodiments of the second aspect, the first information is used to indicate a sending rank indication TRI and a sending precoding matrix indication TPMI, TRI is used to indicate the number of transmission layers, TPMI is used to indicate the precoding matrix, and the number of transmission layers and the precoding matrix are used to jointly indicate a codeword.

In combination with some embodiments of the second aspect, the number of transmission layers and the precoding matrix jointly indicate a codeword, including: determining a pre-configured first number of first codebooks based on the antenna port division method of the terminal, wherein the first number of first codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the number of codewords in the first number of first codebooks is less than or equal to a first threshold; determining a target codebook from the first number of first codebooks according to TRI; and determining a codeword based on TPMI and the target codebook.

In combination with some embodiments of the second aspect, the first codebook is preconfigured in the following manner: based on the antenna port division method of the terminal, A first number of preconfigured second codebooks is determined, wherein the first number of second codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, a codeword in the second codebook is less than or equal to a codeword in a third codebook corresponding to the same number of transmission layers, and the third codebook is a codebook specified by the protocol; and a first codebook is determined based on one or more second codebooks.

In combination with some embodiments of the second aspect, the second codebook is composed of some codewords in the third codebook; the second codebook is pre-configured in at least one of the following ways: selecting a second number of codewords from the third codebook according to a first preset order to form the second codebook, wherein the first preset order is determined by the cosine similarity between different codewords in the third codebook; selecting a second number of codewords from the third codebook based on a first parameter and a second parameter to form the second codebook, wherein the first parameter and the second parameter are parameters required to determine the codeword during downlink communication; selecting a second number of codewords from the third codebook according to a second preset order to form the second codebook, wherein the second preset order is the order in which the codewords in the third codebook are arranged; selecting the 2X-1th codeword in the third codebook to form the second codebook, wherein X is a positive integer; selecting the 2Xth codeword in the third codebook to form the second codebook.

In combination with some embodiments of the second aspect, the number of codewords in the second codebook corresponding to each number of transmission layers is determined based on a preset rule.

In combination with some embodiments of the second aspect, the antenna port division method includes at least one of the following methods: dividing into 1 antenna port group, each antenna port group has 8 antenna ports; dividing into 2 antenna port groups, each antenna port group has 4 antenna ports; dividing into 4 antenna port groups, each antenna port group has 2 antenna ports; dividing into 8 antenna port groups, each antenna port group has 1 antenna port.

According to a third aspect of an embodiment of the present disclosure, an uplink communication method is provided, the method comprising: a network device sends first information to a terminal, the first information being used to indicate a codeword used for uplink communication; the terminal receives the first information; the terminal sends at least one of an uplink reference signal and an uplink channel based on the codeword; the network device receives at least one of an uplink reference signal and an uplink channel.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

According to the fourth aspect of an embodiment of the present disclosure, a terminal is provided, comprising: a transceiver module; the transceiver module is used to receive first information, the first information is used to indicate a codeword used for uplink communication; the transceiver module is also used to send at least one of an uplink reference signal and an uplink channel based on the codeword.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

According to a fifth aspect of an embodiment of the present disclosure, a network device is provided, comprising: a transceiver module; the transceiver module is used to send first information, the first information is used to indicate a codeword used for uplink communication; the transceiver module is also used to receive at least one of an uplink reference signal and an uplink channel, and at least one of the uplink reference signal and the uplink channel is sent based on the codeword.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

According to a sixth aspect of an embodiment of the present disclosure, a terminal is provided, comprising: one or more processors; wherein the terminal is used to execute the first aspect and any one of the uplink communication methods in the first aspect.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

According to a seventh aspect of an embodiment of the present disclosure, a network device is provided, comprising: one or more processors; wherein the network device is used to execute the second aspect and any one of the uplink communication methods in the second aspect.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

According to the eighth aspect of an embodiment of the present disclosure, a communication system is provided, including a terminal and a network device, wherein the terminal is configured to implement the first aspect and any one of the uplink communication methods in the first aspect, and the network device is configured to implement the second aspect and any one of the uplink communication methods in the second aspect.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

According to the ninth aspect of the embodiment of the present disclosure, a storage medium is provided, which stores instructions. When the instructions are executed on a communication device, the communication device executes the uplink communication method of the first aspect and any one of the first aspect or the second aspect and any one of the second aspect.

In the above embodiment, the codeword used for uplink communication can be quickly indicated through the first information, and uplink communication is performed based on the codeword, thereby improving the efficiency of uplink communication.

According to the tenth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure propose a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation manner of the first aspect or the second aspect.

According to an eleventh aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a computer program, which, when executed on a computer, Enable the computer to execute the method described in the optional implementation manner of the first aspect or the second aspect.

According to a twelfth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a chip or a chip system, which includes a processing circuit configured to execute the method described in the optional implementation of the first or second aspect above.

It can be understood that the terminal, access network device, first network element, other network elements, core network device, communication system, storage medium, program product, computer program, chip or chip system involved in each embodiment of the present disclosure are used to execute the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be repeated here.

The embodiments of the present disclosure provide an uplink communication method, a terminal, a network device, and a storage medium. In some embodiments, the terms such as uplink communication method, information processing method, and communication method can be replaced with each other, the terms such as uplink communication device, information processing device, and communication device can be replaced with each other, and the terms such as information processing system and communication system can be replaced with each other.

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

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

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

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

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

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

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

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

The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, quantity or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute unnecessary restrictions due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and the "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number, and can be one or more. Taking the "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

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

In some embodiments, terms such as "in response to ...", "in response to determining ...", "in the case of ...", "at the time of ...", "when ...", "if ...", "if ...", etc. can be used interchangeably.

In some embodiments, the terms "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", "above" and the like can be used interchangeably, and "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", The terms "not higher than" and "lower than" are interchangeable.

In some embodiments, devices and equipment may be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they may also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station" and in some embodiments may also be understood as "node", "access point (access point)", "transmission point (TP)", "reception point (RP)", "transmission and/or reception point (transmission/reception point, TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (bandwidth part, BWP)", etc.

In some embodiments, the term "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal (user terminal)", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

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

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

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

FIG1 is a schematic diagram of a communication system architecture according to an embodiment of the present disclosure.

As shown in FIG. 1 , a communication system 100 includes a terminal 101 and a network device 102 .

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

In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

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

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

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

In some embodiments, the core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of the Evolved Packet Core (EPC), the 5G Core Network (5GCN), and the Next Generation Core (NGC).

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

The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or part of the subject, but are not limited thereto. The subjects shown in FIG1 are examples, and the communication system may include all or part of the subjects in FIG1 , or may include other subjects other than FIG1 , and the number and form of the subjects are arbitrary, and the subjects may be physical or virtual, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, and may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

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

In the disclosed embodiments, in the study of MIMO uplink 8-port transmission enhancement of version (release, R) 18, relevant discussions are conducted on fully coherent codeword equipment, partially coherent codeword design, incoherent codeword design, and transmit precoding matrix indicator (TPMI) design. First, the antenna port group of the terminal is defined, that is, the number of antenna port groups of the terminal is defined as Ng, and the antennas in each antenna port group perform fully coherent transmission, and the antennas between different antenna port groups perform incoherent transmission. When the terminal is a fully coherent terminal, Ng is 1; when the terminal is a partially coherent terminal, Ng is 2 or 4; when the terminal is an incoherent terminal, Ng is 8. For partially coherent codewords, the basic principle involved is to design based on the fully coherent codewords of R15 uplink 4 ports or 2 ports.

For example, when Ng is 2, it means that the 8 antenna ports are divided into 2 antenna port groups, and each antenna port group includes 4 antenna ports.

In some embodiments, each antenna port of the terminal may transmit uplink reference signals and/or uplink channels of different transmission layers. The number of transmission layers may be referred to as a rank.

In some embodiments, for a partially coherent codeword with Ng being 2, a fully coherent codeword design is based on the R15 uplink 4 ports, that is, each port group corresponds to a fully coherent codeword of the R15 uplink 4 ports.

In some embodiments, when the terminal corresponds to 8 antenna ports, Ng is 2 and rank is 1, the codeword can be designed as or Wherein, A can be expressed as the R15 uplink 4-port fully coherent codeword.

Of course, in the above example, when the rank is 1, or This is just an exemplary description. Since A is actually a fully coherent codeword for uplink 4 ports, that is, A can be a 4×1 matrix. Therefore, in fact, 8 ports correspond to rank 1. Codeword, you can add 0 in the middle of A. Assume Then the codeword corresponding to rank 1 of port 8 can be It can be seen that in the matrix corresponding to the codeword, one column can be considered to correspond to one transmission layer, and each row corresponds to one antenna port. When Ng is 2, it means that the 8 antenna ports are divided into two antenna port groups, and each antenna port group includes 4 antenna ports. Then the first 4 antenna ports can be divided into one antenna port group, and the last 4 can be divided into another antenna port group. That is, the codeword is or Alternatively, the 1st, 2nd, 5th, and 6th antenna ports may be divided into one antenna port group, and the 3rd, 4th, 7th, and 8th antenna ports may be divided into another antenna port group. That is, the codeword is or It is also possible to divide the 1st, 3rd, 5th, and 7th antenna ports into one antenna port group, and divide the 2nd, 4th, 6th, and 8th antenna ports into another antenna port group. That is, the codeword is or Of course, the 1 in the above exemplary codeword can also be replaced by -1, j or -j, where j represents an imaginary number, that is, j ² = -1. This disclosure does not limit this.

That is, the 8-port codeword can be obtained based on the uplink 4-port fully coherent codeword and padded with 0. Among them, 0 can be padded before, after or in the middle of the uplink 4-port fully coherent codeword, which is not limited in the present disclosure.

In some embodiments, when the terminal corresponds to 8 antenna ports, Ng is 2 and rank is 2, 3 or 4, the codeword can be designed as or or Among them, A _rank , A' and A" can be expressed as uplink 4-port fully coherent codewords corresponding to the corresponding transmission layer of R15.

For example, when the rank is 2, assuming that all layers are transmitted in one port group, then the 8-port corresponds to the codeword of rank 2. Can be Assuming that all layers are transmitted in two port groups, the 8-port corresponds to the codeword with rank 2. Can be Among them, A' and A" can be _A1 , that is, the upstream 4 ports with rank 1 Fully coherent codewords.

For another example, when the rank is 3, assuming that all layers are transmitted in one port group, then the 8-port corresponds to the codeword of rank 3 Can be Assuming that all layers are transmitted in two port groups, there may be two situations. For example, (1,2) or (2,1). That is, one port group corresponds to 2 ranks, and the other port group corresponds to 1 rank. Then 8 ports correspond to the codeword with rank 3. Can be or Among them, one of A' and A" may be _A1 , that is, an uplink 4-port fully coherent codeword with rank 1; and the other may be _A2 , that is, an uplink 4-port fully coherent codeword with rank 2.

In some embodiments, when the terminal corresponds to 8 antenna ports, Ng is 2 and rank is greater than 4, the codeword can be designed as Among them, A' and A" can be expressed as uplink 4-port fully coherent codewords corresponding to the corresponding transmission layer of R15.

Of course, for the codeword examples provided in the above embodiments, for A, A _rank , A', and A", when filling with 0s, they can be filled before, after, or in the middle of the uplink 4-port fully coherent codeword, and the present disclosure does not limit this.

In some embodiments, as shown in Table 1, the fully coherent codewords of the uplink 4-port rank 1 are:

Table 1

In some embodiments, as shown in Table 2, the fully coherent codewords of the uplink 4-port rank 2 are:

Table 2

In some embodiments, as shown in Table 3, the fully coherent codewords of the uplink 4-port rank 3 are:

Table 3

In some embodiments, as shown in Table 4, the fully coherent codewords of the uplink 4-port rank 4 are:

Table 4

It can be understood that when Ng is 2, the A, A _rank , A', and A' involved in the code words corresponding to different transmission layers of the 8 ports can select the corresponding code words in the corresponding rank uplink 4 ports. Of course, the coefficients of each code word in Table 1, Table 2, Table 3, and Table 4 can be ignored, and only the corresponding parameters in the matrix box can be selected. For example, when selecting the first code word with rank 1, the coefficient can be ignored. Select only That's it.

In some embodiments, when Ng is 2, the following division of the number of transmission layers can be supported, as shown in Table 5.

Table 5

Among them, when rank is 5, the transmission layer is divided into "(3,2)", and when rank is 7, the transmission layer is divided into "(4,3)" is still under discussion. Other cases can be supported. For example, when rank is 5, the number of layers can be divided into 2+3. In this case, Ng is 2, and the partial coherent codewords of rank 5 can be Among them, _A2 is the uplink 4-port fully coherent codeword with rank 2, and _A3 is the uplink 4-port fully coherent codeword with rank 3.

Of course, it is understandable that Table 5 does not show the division of the number of transmission layers when rank is 1 and rank is 8. However, it should be understood that when rank is 1, all layers can be supported in one port group, i.e. (1,0), (0,1). And when rank is 8, all layers can be supported in two port groups, i.e. (4,4).

It can be seen that when Ng is 2, no matter how many transmission layers there are, the codeword corresponding to the 8 ports can be recorded as Combined with the division of different transmission layers in Table 5, they can correspond to A' and A". When a certain antenna port group corresponds to transmission layer 0, this column can be directly omitted. Therefore, when rank is 1, it can be abbreviated as or

In some embodiments, when Ng is 4, it is similar to the case where Ng is 2. That is, the 8 antenna ports are divided into 4 antenna port groups, each antenna port group includes 2 antenna ports, which can correspond to an R15 uplink 2-port fully coherent codeword. Among them, when Ng is 4, the codeword corresponding to the corresponding 8 ports can be recorded as Among them, A', A", A"' and A"" can be expressed as uplink 2-port fully coherent codewords corresponding to the corresponding transmission layer of R15. When a certain antenna port group corresponds to transmission layer 0, this column can be directly omitted.

In some embodiments, when Ng is 4, the following division of the number of transmission layers can be supported, as shown in Table 6.

Table 6

It should be understood that in each embodiment of the present disclosure, the upper limit of the number of layers that can be transmitted by each antenna port group cannot exceed the number of antenna ports in the port group. For example, when the antenna port group includes 4 antenna ports, the antenna port group can transmit up to 4 layers. When the antenna port group includes 2 antenna ports, the antenna port group can transmit up to 2 layers.

In some embodiments, as shown in Table 7, the fully coherent codewords with uplink 2 port rank 1 are:

Table 7

In some embodiments, as shown in Table 8, the fully coherent codewords of uplink 2 port rank 2 are:

Table 8

Combined with the division of different transmission layers in Table 6, the number of transmission layers corresponding to A', A", A"' and A"" can be obtained respectively. Combined with the fully coherent codewords provided in Table 7 and Table 8, the codewords corresponding to the 8 ports when Ng is 4 can be obtained. Of course, the coefficients of each codeword in Table 7 and Table 8 can be ignored, and only the corresponding parameters in the matrix box can be selected. For example, when selecting the first codeword with rank 1, the coefficient can be ignored. Select only That's it.

Assume that the rank is 5 and the layers are divided into (2, 0, 2, 1) as an example. The codeword corresponding to the 8-port can be Among them, A' can be expressed as a fully coherent codeword with rank 2 of R15 upstream port 2, A"' can be expressed as a fully coherent codeword with rank 2 of R15 upstream port 2, and A"" can be expressed as a fully coherent codeword with rank 1 of R15 upstream port 2.

However, taking Ng as 2 as an example, when the rank is 5 and the number of transmission layers is divided into 2+3, there are 8*4=32 codeword situations. According to the above-mentioned codeword structure, the transmission layer division method, and the number of codewords of different transmission layers of the 4 uplink ports of R15, the number of codewords corresponding to the 8 ports when Ng is 2 is extremely large. Based on the codeword candidates provided in Tables 1, 2, 3, and 4 above, the number of codewords obtained for the 8 ports will be in the thousands.

In some embodiments, the fully coherent codeword is indicated by 7 bits, and the incoherent codeword is indicated by 8 bits. Considering that it is similar to the coherent and incoherent types, when Ng is 2 and Ng is 4, it is also desirable to use fewer bits for indication. For example, in the case of 8-bit indication, the maximum number of codewords is 256. Of course, the maximum number of codewords can be determined based on the number of bits, such as 9 bits can correspond to a maximum number of codewords of 512, and the present disclosure does not limit the maximum number of codewords.

In some embodiments, the above-mentioned A, A _rank , A′, A″, A′″ and A″″ may also become precoding matrices.

In some embodiments, in order to reduce the number of partially coherent codewords, the selected fully coherent codewords of the R15 uplink 4-port and 2-port can be limited. For example, Table 1 shows 16 codewords, and it is possible to consider selecting some of them, thereby reducing the number of fully coherent codewords selected, and thereby reducing the number of codewords of the 8-port.

FIG2 is a schematic diagram of an uplink communication method interaction according to an embodiment of the present disclosure. As shown in FIG2 , the present disclosure embodiment relates to an uplink communication method, which is used in a communication system 100, and the method includes:

Step S2101, the network device 102 sends first information to the terminal 101.

In some embodiments, the network device 102 sends first information to the terminal 101 .

In some embodiments, terms such as "send", "transmit", "report", "send", "transmit", "bidirectional transmission", "send and/or receive" can be used interchangeably.

In some embodiments, the terminal 101 receives first information sent by the network device 102 .

In some embodiments, "obtain", "obtain", "get", "receive", "transmit", "bidirectional transmission", "send and/or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from high levels, obtaining by self-processing, autonomous implementation, etc.

In some embodiments, the first information is used to indicate a codeword used for uplink communication.

In some embodiments, the first information may be downlink control information (DCI).

It can be understood that the information sent by the network device 102 to the terminal 101 can be downlink (DL) communication. The terms "downlink", "downlink", "physical downlink" and the like can be used interchangeably.

In some embodiments, the terms "DCI", "downlink assignment", "DL DCI", "uplink (UL) grant", "UL DCI", etc. can be used interchangeably.

In some embodiments, the names of information, etc. are not limited to the names recorded in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "code element", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

In some embodiments, the first information includes a first field. The first field is used to jointly indicate a transmit rank indication (TRI) and a TPMI.

In some embodiments, the first field may be a precoding information and number of layers indication field. Of course, the first field may also be called a precoding information and number of layers field, etc., and the present disclosure does not limit the name of the first field.

In some embodiments, TRI is used to indicate the number of transmission layers, for example, to indicate the value of rank, that is, the value of the number of transmission layers.

In some embodiments, the TPMI is used to indicate a precoding matrix, for example, to indicate a specific codeword in a codebook.

In some embodiments, the terms "codebook", "codeword", "precoding matrix" and the like can be interchangeable. For example, a codebook can be a collection of one or more codewords/precoding matrices.

In some embodiments, the first information may further include a second field. The second field may be used to indicate the antenna port division method of the terminal.

For example, the antenna port division method is to divide the antenna port into two antenna port groups, each antenna port group includes four antenna ports.

For another example, the antenna ports are divided into four antenna port groups, each of which includes two antenna ports.

For another example, the antenna port division method is to divide the antenna ports into one antenna port group, and each antenna port group includes 8 antenna ports.

For another example, the antenna port division method is to divide the antenna port into 8 antenna port groups, and each antenna port group includes 1 antenna port.

In some embodiments, the second domain may be referred to as an “antenna port division indication domain”, “antenna port division domain”, “antenna port group division indication domain”, etc. The present disclosure does not limit the name of the second domain.

Of course, in some embodiments, if the antenna port division method is determined by the terminal itself, the first information may not include the second field, or the second field in the first information is empty. This disclosure does not limit this.

In some embodiments, the terms "precoding", "precoder", "weight", "precoding weight", "quasi-co-location (QCL)", "transmission configuration indication (TCI) state", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "the number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angular degree", "antenna", "antenna element", "panel" and the like are interchangeable.

Step S2102: Terminal 101 determines a codeword based on the first information.

In some embodiments, the terminal 101 may determine the codeword used for uplink communication according to the TRI and TPMI jointly indicated by the first information.

In some embodiments, the terminal may determine the antenna port division method according to the second field in the first information or according to the terminal implementation. Based on the antenna port division method, the terminal may determine a preconfigured first number of first codebooks. Among them, the first codebook may be considered as a codebook corresponding to 8 antenna ports, and different numbers of transmission layers may correspond to different codebooks corresponding to 8 antenna ports. Therefore, the first number of first codebooks may be codebooks corresponding to 8 antenna ports with different numbers of transmission layers under the same antenna port division method.

In some embodiments, the number of all codewords in the first number of first codebooks is less than or equal to a first threshold. For example, the first threshold may be 256.

For example, the number of the first threshold value may be related to the number of bits indicating the codeword. For example, when 8 bits are used to indicate the first number of first codebooks, the first threshold value may be 256. For another example, when 9 bits are used to indicate the first number of first codebooks, the first threshold value may be 512. That is, the first threshold value may be equal to 2 raised to the power of the number of bits. Specifically, adaptive adjustment may be performed according to actual conditions, such as setting the first threshold value to 255 or 500, etc., and the present disclosure does not limit the specific value of the first threshold value.

For example, assuming that the maximum number of transmission layers of an antenna port group is 4, the first number of first codebooks may include a codebook corresponding to 8 antenna ports with rank 1, a codebook corresponding to 8 antenna ports with rank 2, a codebook corresponding to 8 antenna ports with rank 3, and a codebook corresponding to 8 antenna ports with rank 4.

Among them, the "8 ports" and "8 antenna ports" in the various embodiments of the present disclosure can be used interchangeably, and the present disclosure is not limited thereto.

Among them, the "4 ports" and "4 antenna ports" in each embodiment of the present disclosure can be used interchangeably, and the present disclosure is not limited thereto.

Among them, the "2 ports" and "2 antenna ports" in each embodiment of the present disclosure can be used interchangeably, and the present disclosure is not limited thereto.

In some embodiments, the terminal can determine the first codebook corresponding to the target transmission layer in the first number of first codebooks, that is, the target codebook, in combination with the target transmission layer number indicated by TRI. The terminal then determines the target codeword from the target codebook according to TPMI. The target codeword is the codeword used by the terminal for uplink communication this time.

In some embodiments, terms such as "target", "certain", "preset", "preset", "setting", "indicated", "some", "any", and "first" can be interchangeable, and "specific A", "preset A", "preset A", "setting A", "indicated A", "some A", "any A", and "first A" can be interpreted as A pre-defined in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., and can also be interpreted as specific A, some A, any A, or first A, etc., but are not limited to this.

In some embodiments, the first codebook may be determined based on the second codebook. For example, a first number of second codebooks may be determined based on the antenna port division method. The second codebook may be considered as a codebook corresponding to 4 antenna ports, and different numbers of transmission layers may correspond to different codebooks corresponding to 4 antenna ports. Therefore, the first number of second codebooks may be codebooks corresponding to 4 antenna ports with different numbers of transmission layers under the same antenna port division method. The first codebook may be determined based on one or more second codebooks.

In some embodiments, for the same number of transmission layers, the number of codewords in the second codebook is less than or equal to the number of codewords in the third codebook. The third codebook may be a codebook specified by the protocol. For example, the number of codewords in the second codebook with rank 2 is less than or equal to the number of codewords in the third codebook with rank 2.

For example, the third codebook may be the codebook corresponding to Table 1, Table 2, Table 3, Table 4, Table 7, and Table 8 above, that is, the codebook corresponding to 4 antenna ports with different transmission layer numbers in R15, and the codebook corresponding to 2 antenna ports with different transmission layer numbers in R15.

For example, assuming that the maximum number of transmission layers of an antenna port group is 4, the first number of second codebooks may include a codebook corresponding to 4 antenna ports with rank 1, a codebook corresponding to 4 antenna ports with rank 2, a codebook corresponding to 4 antenna ports with rank 3, and a codebook corresponding to 4 antenna ports with rank 4.

In some embodiments, the second codebook may be composed of some codewords in the third codebook.

For example, at least half of the codewords in the third codebook are selected to form the second codebook. When Ng is 2, the number of codewords corresponding to different transmission layer numbers can be recorded as N _4Tx,i , where 4Tx represents 4 uplink ports and i represents the number of transmission layers.

In some embodiments, based on the division of the number of transmission layers shown in Table 5, when the transmission layer division is supported as "(3, 2)" and "(4, 3)", the supported ( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) includes multiple cases.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 4, 2, 1), then the number of codewords corresponding to the first number of first codebooks is 199.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (9, 4, 2, 1), then the number of codewords corresponding to the first number of first codebooks is 226.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (10, 4, 2, 1), then the number of codewords corresponding to the first number of first codebooks is 255.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 5, 2, 1), then the number of codewords corresponding to the first number of first codebooks is 2 30.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 4, 3, 1), then the number of codewords corresponding to the first number of first codebooks is 2 16 .

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 4, 4, 1), then the number of codewords corresponding to the first number of first codebooks is 235.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 4, 2, 2), then the number of codewords corresponding to the first number of first codebooks is 208.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (9, 4, 3, 1), then the number of codewords corresponding to the first number of first codebooks is 243.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (9, 4, 2, 2), then the number of codewords corresponding to the first number of first codebooks is 235.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 5, 3, 1), then the number of codewords corresponding to the first number of first codebooks is 249.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 5, 2, 2), then the number of codewords corresponding to the first number of first codebooks is 239.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 4, 3, 2), then the number of codewords corresponding to the first number of first codebooks is 227.

In some embodiments, when Ng is 2, (N4Tx _,1 , _N4Tx,2 , _N4Tx,3 , _N4Tx,4 ) = (9, 4, 3, 2), then the number of codewords corresponding to the first number of first codebooks is 254.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 4, 4, 2), then the number of codewords corresponding to the first number of first codebooks is 248.

In some embodiments, based on the division of the number of transmission layers shown in Table 5, if the division of the transmission layer into "(3, 2)" and "(4, 3)" is not supported, the number of codewords corresponding to the (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) cases shown in the above embodiments will be slightly reduced, that is, the number of codewords corresponding to the division of the transmission layer into "(3, 2)" and "(4, 3)" will be reduced. For details, refer to the above-mentioned 8-antenna port codeword calculation method and the number of codewords in the second codebook, which will not be repeated in this disclosure.

When the transmission layer is not divided into "(3,2)" and "(4,3)", the number of codewords is reduced accordingly. Therefore, in addition to the above-mentioned multiple cases of supporting (N4Tx _{, 1} , _{N4Tx, 2} , N4Tx _{, 3} , _{N4Tx, 4} ), the following multiple cases can also be supported.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 6, 2, 1), then the number of codewords corresponding to the first number of first codebooks is 249.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (9, 5, 2, 1), then the number of codewords corresponding to the first number of first codebooks is 247.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 5, 3, 2), then the number of codewords corresponding to the first number of first codebooks is 239.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (10, 4, 4, 2), then the first number of The number of codewords corresponding to one codebook is 252.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 6, 2, 2), then the number of codewords corresponding to the first number of first codebooks is 256.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (9, 4, 4, 1), then the number of codewords corresponding to the first number of first codebooks is 242.

In some embodiments, when Ng is 2, (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) = (8, 5, 4, 1), then the number of codewords corresponding to the first number of first codebooks is 246.

In some embodiments, when Ng is 4, the number of codewords corresponding to different transmission layer numbers can be recorded as N _2Tx,i , where 2Tx represents 2 uplink ports.

In some embodiments, when Ng is 4, (N _{2Tx, 1} , N _{2Tx, 2} )=(2, 2), and the number of codewords corresponding to the first number of first codebooks is 2 32 .

The above embodiments are described exemplarily with the first threshold value of 256. Of course, if replaced with other values, the specific values of N _4Tx,i and/or N _2Tx,i can be adaptively adjusted according to the actual situation, and the present disclosure does not limit it. It can be understood that the N _4Tx,i involved in the above corresponds to the number of codewords contained in the second codebook when the number of transmission layers is i when the antenna port division method is 2 antenna port groups, each antenna port group includes 4 antenna ports. And, the N _2Tx,i involved in the above corresponds to the number of codewords contained in the second codebook when the number of transmission layers is i when the antenna port division method is 4 antenna port groups, each antenna port group includes 2 antenna ports. Then (N _4Tx,1 , N _4Tx,2 , N _4Tx,3 , N _4Tx,4 ) and/or (N _2Tx,1 , N _2Tx,2 ) can correspond to the number of all codewords in the first number of first codebooks.

For example, the number of codewords of the first codebook corresponding to different numbers of transmission layers can be calculated according to N _4Tx,1 , N _4Tx,2 , N _4Tx,3 and N _4Tx,4 respectively, when the corresponding antenna port division mode is 2 antenna port groups, and each antenna port group includes 4 antenna ports. Then the number of codewords of the first codebook of the first number is obtained. And the number of codewords of the first codebook corresponding to different numbers of transmission layers can be calculated according to N _2Tx,1 and N _2Tx,2 respectively, when the corresponding antenna port division mode is 4 antenna port groups, and each antenna port group includes 2 antenna ports. Then the number of codewords of the first codebook of the first number is obtained.

Although the possible values of _N4Tx,i and/or _N2Tx,i are given in the above embodiments, that is, how many codewords are included in the codebooks corresponding to different transmission layers, it is still unclear how the codewords in the second codebook are determined from the third codebook.

In some embodiments, the second codebook may select a second number of codewords from the third codebook according to a first preset order to form the second codebook, wherein the first preset order is determined by the cosine similarity between different codewords in the third codebook.

For example, the cosine similarity between different codewords in the third codebook may be determined, and then the first preset order may be determined according to the pre-set similarity. A second number of codewords may be selected from the third codebook in sequence based on the first preset order. The second number may refer to N _4Tx,i and/or N _2Tx,i in the above embodiment.

For example, for the codebook with rank 1 of the uplink 4 ports shown in Table 1, it can be selected in the index order of "1, 3, 9, 11, 6, 8, 14, 16, 2, 4, 10, 12, 5, 7, 13, 15". Among them, index 1 is the first codeword in the first row of Table 1, index 3 is the third codeword in the first row of Table 1, index 9 is the first codeword in the second row of Table 1, and so on.

For example, for the codebook with rank 1 of the uplink 4 ports shown in Table 1, it can be selected in the index order of "2, 4, 10, 12, 5, 7, 13, 15, 1, 3, 9, 11, 6, 8, 14, 16". Among them, index 1 is the first codeword in the first row of Table 1, index 3 is the third codeword in the first row of Table 1, index 9 is the first codeword in the second row of Table 1, and so on.

For another example, for the codebook with rank 2 of the uplink 4 ports shown in Table 2, it can be selected in the index order of "1, 5, 4, 8, 2, 6, 3, 7". Among them, index 1 is the first codeword in the first row of Table 2, index 5 is the first codeword in the second row of Table 2, index 4 is the fourth codeword in the first row of Table 2, and so on.

For another example, for the codebook with uplink 4 ports rank 3 shown in Table 3, it can be selected in the index order of "1, 3, 2, 4". Among them, index 1 is the first codeword in the first row of Table 3, index 3 is the third codeword in the first row of Table 3, index 2 is the second codeword in the first row of Table 3, and index 4 is the fourth codeword in the first row of Table 3.

For another example, for the codebook with uplink 4 ports rank 4 shown in Table 4, it can be selected in sequence according to the index order of "1, 2". Among them, index 1 is the first codeword in the first row in Table 4, and index 2 is the second codeword in the first row in Table 4.

For another example, for the codebook with uplink port 2 rank 1 shown in Table 7, it can be selected in the index order of "1, 2, 3, 4". Among them, index 1 is the first codeword in the first row of Table 7, index 2 is the second codeword in the first row of Table 7, index 3 is the third codeword in the first row of Table 7, and index 4 is the fourth codeword in the first row of Table 7.

For another example, for the codebook with uplink port 2 rank 2 shown in Table 8, it can be selected in sequence according to the index order of "1, 2". Among them, index 1 is the first codeword in the first row in Table 8, and index 2 is the second codeword in the first row in Table 8.

In some embodiments, the second codebook may select a second number of codewords from the third codebook based on the first parameter and the second parameter to form the second codebook, wherein the first parameter and the second parameter are parameters required to determine the codeword during downlink communication.

For example, the first parameter may be an i1,1 parameter required for determining a codeword during downlink communication, and the second parameter may be an i2 parameter required for determining a codeword during downlink communication.

For example, the second codebook may be formed by selecting some codewords from the third codebook by fixing the i1,1 parameter and/or the i2 parameter, wherein the i1,1 parameter may have any one or more fixed values in {0, 1, 2, 3}, and the i2 parameter may have any one or more fixed values in {0, 1, 2, 3}.

For example, for the third codebook with Ng=2 and rank=1 for uplink 4 ports, the i1,1 parameter and the i2 parameter can be fixed, that is, i1,1={0,1,2,3} and i2={0,1}. Then, 8 code words can be determined based on the fixed i1,1={0,1,2,3} and i2={0,1}. For example, 8 code words are determined according to i1,1=0, i2=0; i1,1=0, i2=1; i1,1=1, i2=0; i1,1=1, i2=1; i1,1=2, i2=0; i1,1=2, i2=1; i1,1=3, i2=0; i1,1=3, i2=1. When the value of N _4Tx,1 is greater than 8, the case of i2=2 can be introduced, that is, based on i1,1=0, i2=2; ...; i1,1=3, i2=2. Select the corresponding number of code words in turn. Of course, if the number of code words introduced with i2=2 is still insufficient, continue to introduce i2=3 until N _4Tx,1 code words are selected.

Of course, the above is only an exemplary description. Specifically, for the i1,1 parameter and the i2 parameter, any one or more values in {0, 1, 2, 3} may be fixed according to actual conditions, and the present disclosure does not limit this.

For another example, for the third codebook with Ng being 2 and uplink 4 ports rank being 2, the i1,1 parameter and the i2 parameter can be fixed, that is, i1,1＝{0,1,2,3} and i2＝{0}. Then, four code words can be first determined based on the fixed i1,1＝{0,1,2,3} and i2＝{0}. For example, four code words are determined according to i1,1＝0, i2＝0; i1,1＝1, i2＝0; i1,1＝2, i2＝0; i1,1＝3, i2＝0 respectively. When the value of N _4Tx,2 is greater than 4, the case of i2＝1 can be introduced, that is, based on i1,1＝0, i2＝1; ...; i1,1＝3, i2＝1. Select the corresponding number of code words in sequence.

For another example, for the third codebook with Ng being 2 and uplink 4 ports rank being 3, the i1,1 parameter and the i2 parameter can be fixed, that is, i1,1＝{0} and i2＝{0,1}. Then, two code words can be determined first based on the fixed i1,1＝{0} and i2＝{0,1}. For example, two code words are determined according to i1,1＝0, i2＝0; i1,1＝0, i2＝1 respectively. When the value of N _4Tx,3 is greater than 2, the case of i1,1＝1 can be introduced, that is, based on i1,1＝1, i2＝0; i1,1＝1, i2＝1. The corresponding number of code words are selected in sequence.

For another example, for the third codebook with Ng=2 and uplink 4 ports rank=4, the i2 parameter can be fixed, that is, i2={0}. Then, one codeword can be determined based on the fixed i2={0}. When the value of N _4Tx,4 is greater than 1, the case of i2=1 can be introduced, that is, based on i2=1, the corresponding number of codewords can be selected in sequence.

In some embodiments, the second codebook may select a second number of codewords from the third codebook according to a second preset order to form the second codebook, wherein the second preset order is the order in which the codewords in the third codebook are arranged.

For example, the order in which the codewords in the third codebook are arranged may be determined as the second preset order. A second number of codewords may be selected from the third codebook in sequence based on the second preset order. The second number may refer to N _4Tx,i and/or N _2Tx,i in the above embodiment.

For example, for the codebook with rank 1 of the uplink 4 ports shown in Table 1, it can be selected in the index order of "1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16". Among them, index 1 is the first codeword in the first row of Table 1, index 2 is the second codeword in the first row of Table 1, index 9 is the first codeword in the second row of Table 1, and so on.

For another example, for the codebook with rank 2 of the uplink 4 ports shown in Table 2, it can be selected in the index order of "1, 2, 3, 4, 5, 6, 7, 8". Among them, index 1 is the first codeword in the first row of Table 2, index 2 is the second codeword in the first row of Table 2, index 5 is the first codeword in the second row of Table 2, and so on.

For another example, for the codebook with uplink 4 ports rank 3 shown in Table 3, it can be selected in the index order of "1, 2, 3, 4". Among them, index 1 is the first codeword in the first row of Table 3, index 2 is the second codeword in the first row of Table 3, index 3 is the third codeword in the first row of Table 3, and index 4 is the fourth codeword in the first row of Table 3.

For another example, for the codebook with uplink 4 ports rank 4 shown in Table 4, it can be selected in sequence according to the index order of "1, 2". Among them, index 1 is the first codeword in the first row in Table 4, and index 2 is the second codeword in the first row in Table 4.

For another example, for the codebook with uplink port 2 rank 1 shown in Table 7, it can be selected in the index order of "1, 2, 3, 4". Among them, index 1 is the first codeword in the first row of Table 7, index 2 is the second codeword in the first row of Table 7, index 3 is the third codeword in the first row of Table 7, and index 4 is the fourth codeword in the first row of Table 7.

For another example, for the codebook with uplink port 2 rank 2 shown in Table 8, it can be selected in sequence according to the index order of "1, 2". Among them, index 1 is the first codeword in the first row in Table 8, and index 2 is the second codeword in the first row in Table 8.

In some embodiments, the second codebook may select the 2X-1th codeword in the third codebook to form the second codebook, where X is A positive integer.

For example, for the third codebook corresponding to different transmission layers, a second number of codewords are selected from the third codebook in an odd-numbered index manner to form a second codebook.

For example, a second number of codewords are selected from the third codebook in the index order of 1, 3, 5, 7, . . . to form the second codebook.

In some embodiments, the second codebook may select the 2Xth codeword in the third codebook to form the second codebook.

For example, for the third codebook corresponding to different transmission layers, a second number of codewords are selected from the third codebook in an even-numbered index manner to form a second codebook.

For example, a second number of codewords are selected from the third codebook in the index order of 2, 4, 6, 8, . . . to form the second codebook.

Step S2103: The terminal 101 sends at least one of an uplink reference signal and an uplink channel to the network device 102 based on the determined codeword.

In some embodiments, the terminal 101 may send at least one of an uplink reference signal and an uplink channel to the network device 102 according to the codeword determined in step S2102, such as the target codeword.

In some embodiments, the network device 102 receives at least one of an uplink reference signal and an uplink channel sent by the terminal 101. The at least one of the uplink reference signal and the uplink channel is sent based on the codeword determined in step S2102.

In some embodiments, at least one of an uplink reference signal and an uplink channel is sent according to the correspondence between different antenna ports indicated by the codeword.

In some embodiments, the terminal 101 sends at least one of an uplink reference signal and an uplink channel to the network device 102, which can be considered as an uplink communication.

In some embodiments, the terms "uplink", "uplink", "physical uplink", etc. can be used interchangeably.

In some embodiments, terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

FIG3a is a flow chart of an uplink communication method according to an exemplary embodiment. As shown in FIG3a, the embodiment of the present disclosure relates to an uplink communication method, which can be executed on a terminal, and the method includes:

Step S3101, obtaining first information.

The optional implementation of step S3101 can refer to the optional implementation of step S2101 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

In some embodiments, the terminal obtains first information specified by the protocol.

In some embodiments, the terminal obtains the first information from an upper layer(s).

In some embodiments, the terminal performs processing to obtain the first information.

In some embodiments, step S3101 is omitted, and the terminal autonomously implements the function indicated by the first information, or the above function is default or acquiescent.

Step S3102: determine a codeword based on the first information.

The optional implementation of step S3102 can refer to the optional implementation of step S2102 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

Step S3103: Send at least one of an uplink reference signal and an uplink channel based on the determined codeword.

The optional implementation of step S3103 can refer to the optional implementation of step S2103 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

FIG3b is a flowchart of another uplink communication method according to an exemplary embodiment. As shown in FIG3a, the embodiment of the present disclosure relates to an uplink communication method, which can be executed on a terminal, and the method includes:

Step S3201, obtaining first information.

The optional implementation of step S3201 can refer to the optional implementation of step S2101 in Figure 2, the optional implementation of step S3101 in Figure 3a, and other related parts in the embodiment involved in Figure 2 and other related parts in the embodiment involved in Figure 3a, which will not be repeated here.

In some embodiments, step S3201 is omitted, and the terminal autonomously implements the function indicated by the first information, or the above function is default or acquiescent.

In some embodiments, the first information is used to indicate a transmission rank indication TRI and a transmission precoding matrix indication TPMI, TRI is used to indicate the number of transmission layers, TPMI is used to indicate the precoding matrix, and the number of transmission layers and the precoding matrix are used to jointly indicate a codeword.

Step S3202: Send at least one of an uplink reference signal and an uplink channel based on the codeword.

The optional implementation of step S3202 can refer to the optional implementation of step S2103 in Figure 2, the optional implementation of step S3103 in Figure 3a, and other related parts in the embodiment involved in Figure 2 and other related parts in the embodiment involved in Figure 3a, which will not be repeated here.

In some embodiments, the number of transmission layers and the precoding matrix jointly indicate a codeword, including: determining a pre-configured first number of first codebooks based on an antenna port division method of the terminal, wherein the first number of first codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the number of codewords in the first number of first codebooks is less than or equal to a first threshold; determining a target codebook from the first number of first codebooks according to TRI; and determining a codeword based on TPMI and the target codebook.

In some embodiments, the first codebook is preconfigured in the following manner: based on the antenna port division method of the terminal, a preconfigured first number of second codebooks is determined, wherein the first number of second codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the codeword in the second codebook is less than or equal to the codeword in the third codebook corresponding to the same number of transmission layers, and the third codebook is a codebook specified by the protocol; the first codebook is determined based on one or more second codebooks.

In some embodiments, the second codebook is composed of some codewords in the third codebook; the second codebook is preconfigured in at least one of the following ways: selecting a second number of codewords from the third codebook according to a first preset order to form the second codebook, wherein the first preset order is determined by the cosine similarity between different codewords in the third codebook; selecting a second number of codewords from the third codebook based on a first parameter and a second parameter to form the second codebook, wherein the first parameter and the second parameter are parameters required to determine the codeword during downlink communication; selecting a second number of codewords from the third codebook according to a second preset order to form the second codebook, wherein the second preset order is the order in which the codewords in the third codebook are arranged; selecting the 2X-1th codeword in the third codebook to form the second codebook, wherein X is a positive integer; selecting the 2Xth codeword in the third codebook to form the second codebook.

In some embodiments, the number of codewords in the second codebook corresponding to each number of transmission layers is determined based on a preset rule.

In some embodiments, the antenna port division method includes at least one of the following methods: dividing into 1 antenna port group, each antenna port group has 8 antenna ports; dividing into 2 antenna port groups, each antenna port group has 4 antenna ports; dividing into 4 antenna port groups, each antenna port group has 2 antenna ports; dividing into 8 antenna port groups, each antenna port group has 1 antenna port.

FIG4 is a flow chart of another uplink communication method according to an exemplary embodiment. As shown in FIG4, the embodiment of the present disclosure relates to an uplink communication method, which can be executed on a network device. The method includes:

Step S4101, sending the first information.

The optional implementation of step S4101 can refer to the optional implementation of step S2101 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

In some embodiments, the first information is used to indicate a transmission rank indication TRI and a transmission precoding matrix indication TPMI, TRI is used to indicate the number of transmission layers, TPMI is used to indicate the precoding matrix, and the number of transmission layers and the precoding matrix are used to jointly indicate a codeword.

Step S4102: Acquire at least one of an uplink reference signal and an uplink channel.

The optional implementation of step S4102 can refer to the optional implementation of step S2103 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

In some embodiments, the network device obtains at least one of an uplink reference signal and an uplink channel specified by a protocol.

In some embodiments, the network device obtains at least one of an uplink reference signal and an uplink channel from an upper layer(s).

In some embodiments, the network device performs processing to obtain at least one of an uplink reference signal and an uplink channel.

In some embodiments, step S4102 is omitted, and the network device autonomously implements the function indicated by at least one of the uplink reference signal and the uplink channel, or the above function is default or acquiescent.

In some embodiments, the number of transmission layers and the precoding matrix jointly indicate a codeword, including: determining a pre-configured first number of first codebooks based on an antenna port division method of the terminal, wherein the first number of first codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the number of codewords in the first number of first codebooks is less than or equal to a first threshold; determining a target codebook from the first number of first codebooks according to TRI; and determining a codeword based on TPMI and the target codebook.

In some embodiments, the first codebook is preconfigured in the following manner: based on the antenna port division method of the terminal, a preconfigured first number of second codebooks is determined, wherein the first number of second codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the codeword in the second codebook is less than or equal to the codeword in the third codebook corresponding to the same number of transmission layers, and the third codebook is a codebook specified by the protocol; the first codebook is determined based on one or more second codebooks.

In some embodiments, the second codebook is composed of some codewords in the third codebook; the second codebook is preconfigured in at least one of the following ways: selecting a second number of codewords from the third codebook according to a first preset order to form the second codebook, wherein the first preset order is determined by the cosine similarity between different codewords in the third codebook; selecting a second number of codewords from the third codebook based on a first parameter and a second parameter to form the second codebook, wherein the first parameter and the second parameter are parameters required to determine the codeword during downlink communication; selecting a second number of codewords from the third codebook according to a second preset order to form the second codebook, wherein the second preset order is the order in which the codewords in the third codebook are arranged; selecting the 2X-1th codeword in the third codebook to form the second codebook, wherein X is a positive integer; selecting the 2Xth codeword in the third codebook to form the second codebook.

In some embodiments, the number of codewords in the second codebook corresponding to each number of transmission layers is determined based on a preset rule.

In some embodiments, the antenna port division method includes at least one of the following methods: dividing into 1 antenna port group, each antenna port group has 8 antenna ports; dividing into 2 antenna port groups, each antenna port group has 4 antenna ports; dividing into 4 antenna port groups, each antenna port group has 2 antenna ports; dividing into 8 antenna port groups, each antenna port group has 1 antenna port.

FIG5 is a flow chart of another uplink communication method according to an exemplary embodiment. As shown in FIG5, the embodiment of the present disclosure relates to an uplink communication method, and the method includes:

Step S5101, the network device 102 sends the first information to.

The optional implementation method of step S5101 can refer to the optional implementation method of step S2101 in Figure 2, the optional implementation method of step S3101 in Figure 3a, the optional implementation method of step S3201 in Figure 3b, the optional implementation method of step S4101 in Figure 4, and other related parts in the embodiment involved in Figure 2, other related parts in the embodiment involved in Figure 3a, other related parts in the embodiment involved in Figure 3b, and other related parts in the embodiment involved in Figure 4, which will not be repeated here.

Step S5202 : The terminal 101 sends at least one of an uplink reference signal and an uplink channel to the network device 102 .

The optional implementation method of step S5202 can refer to the optional implementation method of step S2103 in Figure 2, the optional implementation method of step S3103 in Figure 3a, the optional implementation method of step S3202 in Figure 3b, the optional implementation method of step S4102 in Figure 4, and other related parts in the embodiment involved in Figure 2, other related parts in the embodiment involved in Figure 3a, other related parts in the embodiment involved in Figure 3b, and other related parts in the embodiment involved in Figure 4, which will not be repeated here.

Next, the present disclosure will describe the above solution with more detailed embodiments.

A. Number of potential R15 uplink codeword candidates:

In some embodiments, Ng=2 is the number of R15 uplink 4Tx codeword candidate sets supported by the partially coherent codebook, where N _4Tx,i represents the number of codewords selected when the number of R15 uplink 4Tx layers is i.

In some embodiments, when the rank partition includes (3, 2) and (4, 3), the supported (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) are as follows:

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 4, 2, 1), a total of 199 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (9, 4, 2, 1), a total of 226 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (10, 4, 2, 1), a total of 255 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 5, 2, 1), a total of 230 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 4, 3, 1), a total of 216 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 4, 4, 1), a total of 235 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 4, 2, 2), a total of 208 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (9, 4, 3, 1), a total of 243 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (9, 4, 2, 2), a total of 235 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 5, 3, 1), a total of 249 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 5, 2, 2), a total of 239 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 4, 3, 2), a total of 227 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (9, 4, 3, 2), a total of 254 code words;

(N4Tx _,1 , _N4Tx,2 , _N4Tx,3 , _N4Tx,4 ) = (8, 4, 4, 2), for a total of 248 code words.

In some embodiments, when the rank partition does not include (3, 2) and (4, 3), the supported (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ) are as follows:

All of the above supported (N _{4Tx, 1} , N _{4Tx, 2} , N _{4Tx, 3} , N _{4Tx, 4} ), the number of codewords is slightly reduced;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 6, 2, 1), a total of 249 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (9, 5, 2, 1), a total of 247 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 5, 3, 2), a total of 239 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (10, 4, 4, 2), a total of 252 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (8, 6, 2, 2), a total of 256 code words;

( _{N4Tx, 1} , _{N4Tx, 2} , _{N4Tx, 3} , _{N4Tx, 4} ) = (9, 4, 4, 1), a total of 242 code words;

( _N4Tx,1 , _N4Tx,2 , _N4Tx,3 , _N4Tx,4 ) = (8, 5, 4, 1), 246 code words in total.

In some embodiments, Ng=4 is the number of R15 uplink 2Tx codeword candidate sets supported by the partially coherent codebook, where N _2Tx,i represents the number of codewords selected when the number of R15 uplink 2Tx layers is i.

In some embodiments, (N _{2Tx, 1} , N _{2Tx, 2} )=(2, 2) are supported, for a total of 2 32 codewords.

B. R15 uplink codeword candidate set determination scheme:

In some embodiments, Option 1: select N codewords with the smallest cosine similarity. The detailed algorithm process can be referred to the relevant technology, which will not be described in detail in this disclosure.

In some embodiments, the R15 uplink 4Tx rank-1 codebook is selected in the index order of [1, 3, 9, 11, 6, 8, 14, 16, 2, 4, 10, 12, 5, 7, 13, 15].

In some embodiments, the R15 uplink 4Tx rank-1 codebook is selected in the index order of [2, 4, 10, 12, 5, 7, 13, 15, 1, 3, 9, 11, 6, 8, 14, 16].

In some embodiments, R15 uplink 4Tx rank-2 codebook: selected in the index order of [1, 5, 4, 8, 2, 6, 3, 7].

In some embodiments, R15 uplink 4Tx rank-3 codebook: selected in the index order of [1, 3, 2, 4].

In some embodiments, R15 uplink 4Tx rank-4 codebook: selected in sequence according to the index order of [1, 2].

In some embodiments, R15 uplink 2Tx rank-1 codebook: selected in the index order of [1, 2, 3, 4].

In some embodiments, R15 uplink 2Tx rank-2 codebook: selected in the index order of [1, 2].

In some embodiments, Option 2: fix the index values (i1, 1 and i2) of the R15 uplink 4Tx and 2Tx codebooks.

In some embodiments, R15 uplink 4Tx rank-1 codebook: fix i1,1={0,1,2,3} and i2={0,1} and then select i2=2, or fix i1,1={0,1} and i2={0,1,2,3} and then select i1,1=2.

For example, if 10 code words are selected, the code words corresponding to i1,1={0,1} and i2=3 are additionally added.

It is worth noting that the above index can be fixed to any value. For example, if two i2 values are selected, two values from the four i2 candidate values can be selected at will.

In some embodiments, R15 uplink 4Tx rank-2 codebook: fix i1,1={0,1,2,3} and i2={0} and then select i2=1, or fix i1,1={0,1} and i2={0,1} and then select i1,1=2.

For example, if 6 code words are selected, the code words corresponding to i1,1={0,1} and i2=1 are additionally added.

In some embodiments, R15 uplink 4Tx rank-3 codebook: fix i1,1={0} and i2={0,1} and then select i1,1=2, or fix i1,1={0,2} and i2={0} and then select i2=1.

In some embodiments, R15 uplink 4Tx rank-4 codebook: fixed i2={0}, or fixed i2={0,1}.

In some embodiments, Option 3: Select according to the index order in the TPMI table with different numbers of ports and different numbers of ranks in TS 38.211.

In some embodiments, R15 uplink 4Tx rank-1 codebook: select in the order of index [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]

In some embodiments, R15 uplink 4Tx rank-2 codebook: selected in the index order of [1, 2, 3, 4, 5, 6, 7, 8].

In some embodiments, R15 uplink 4Tx rank-3 codebook: selected in the index order of [1, 2, 3, 4].

In some embodiments, R15 uplink 4Tx rank-4 codebook: selected in sequence according to the index order of [1, 2].

In some embodiments, R15 uplink 2Tx rank-1 codebook: selected in the index order of [1, 2, 3, 4].

In some embodiments, R15 uplink 2Tx rank-2 codebook: selected in the index order of [1, 2].

In some embodiments, Option 4: According to the TPMI table with different numbers of ports and different numbers of ranks in TS 38.211, odd indexes are selected in priority order.

In some embodiments, Option 5: According to the TPMI table with different numbers of ports and different numbers of ranks in TS 38.211, the even-numbered index is selected in priority order.

C.8 Port partial coherence codeword indication method:

In some embodiments, Ng=2 partially coherent codebook: According to the R15 uplink 4Tx codebook, Ng=2 Rank division, and codeword generation formula, all Ng=2 partially coherent codewords are generated, and indicated by TRI and TPMI joint coding.

In some embodiments, Ng=4 partially coherent codebook: According to the R15 uplink 2Tx codebook, Ng=4 Rank division, and codeword generation formula, all Ng=4 partially coherent codewords are generated, and indicated by TRI and TPMI joint coding.

It is worth noting that, when selecting the precoding matrix in each embodiment of the present disclosure, the normalization coefficient is not considered, and the normalization coefficients of the codewords are uniformly normalized after the codewords are designed.

In the embodiments of the present disclosure, each step can be implemented as an independent embodiment. Some or all of the steps and their optional implementations can be arbitrarily combined with some or all of the steps in other embodiments, and can also be arbitrarily combined with the optional implementations of other embodiments.

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

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

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

FIG6a is a schematic diagram of an uplink communication device according to an exemplary embodiment. As shown in FIG6a , the uplink communication device 6100 may be, for example, the terminal mentioned above, and the device 6100 includes: a transceiver module 6101. Of course, the device 6100 may also include any possible modules such as a processing module, which is not limited in the present disclosure. In some embodiments, the transceiver module 6101 is used to receive the first information. Optionally, the transceiver module 6101 is used to execute at least one of the communication steps S2101 and S2103 such as sending and/or receiving executed by the terminal in any of the above methods, but is not limited to this and will not be repeated here. Optionally, the processing module is used to execute other steps S2102 executed by the terminal in any of the above methods, but is not limited to this and will not be repeated here.

FIG6b is a schematic diagram of another uplink communication device according to an exemplary embodiment. As shown in FIG6b , the uplink communication device 6200 may be, for example, the network device mentioned above, and the device 6200 includes: a transceiver module 6201. Of course, the device 6200 may also include any possible modules such as a processing module, which is not limited in the present disclosure. In some embodiments, the transceiver module 6201 is used to send the first information. Optionally, the transceiver module 6201 is used to execute at least one of the communication steps S2101 and S2103 such as sending and/or receiving executed by the network device in any of the above methods, but is not limited to this and will not be repeated here.

FIG7a is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. The communication device 7100 may be a network device (e.g., an access network device, a core network device, etc.), or a terminal (e.g., a user device, etc.), or a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. The communication device 7100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

As shown in FIG. 7a , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The communication device 7100 is used to execute any of the above methods.

In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memory 7102 may also be outside the communication device 7100.

In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs at least one of the communication steps S2101 and S2103 of sending and/or receiving in the above method, but is not limited thereto. The processor 7101 performs other steps S2102, but is not limited thereto.

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

In some embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuit 7104 is connected to the memory 7102, and the interface circuit 7104 may be used to receive signals from the memory 7102 or other devices, and may be used to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

The communication device 7100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

Fig. 7b is a schematic diagram of the structure of a chip 7200 provided in an embodiment of the present disclosure. In the case where the communication device 7100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 7200 shown in Fig. 7b, but the present invention is not limited thereto.

The chip 7200 includes one or more processors 7201, and the chip 7200 is used to execute any of the above methods.

In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203. The interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and the interface circuit 7202 can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

In some embodiments, the interface circuit 7202 performs at least one of the communication steps S2101 and S2103 of sending and/or receiving in the above method, but is not limited thereto. The processor 7201 performs other steps S2102, but is not limited thereto.

In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Optionally, all or part of the memory 7203 may be outside the chip 7200.

The present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.

The present disclosure also proposes a program product, which, when executed by the communication device 7100, enables the communication device 7100 to execute any of the above methods. Optionally, the program product is a computer program product.

The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

The present disclosure proposes an algorithm for reducing the number of partially coherent codewords, so that its feedback overhead is comparable to that of fully coherent/incoherent codewords, thereby reducing the feedback overhead.

Claims (21)

An uplink communication method, characterized in that the method comprises: receiving first information, where the first information is used to indicate a codeword used for uplink communication; At least one of an uplink reference signal and an uplink channel is sent based on the codeword. The method according to claim 1 is characterized in that the first information is used to indicate a transmission rank indication TRI and a transmission precoding matrix indication TPMI, the TRI is used to indicate the number of transmission layers, the TPMI is used to indicate the precoding matrix, and the number of transmission layers and the precoding matrix are used to jointly indicate the codeword. The method according to claim 2, characterized in that the number of transmission layers and the precoding matrix jointly indicate the codeword, comprising: Determine, based on an antenna port division method of the terminal, a first number of preconfigured first codebooks, wherein the first number of first codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the number of codewords in the first number of first codebooks is less than or equal to a first threshold; Determine a target codebook from the first number of first codebooks according to the TRI; The codeword is determined based on the TPMI and the target codebook. The method according to claim 3, characterized in that the first codebook is pre-configured in the following manner: Determine, based on the antenna port division method of the terminal, a first number of pre-configured second codebooks, wherein the first number of second codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and a codeword in the second codebook is less than or equal to a codeword in a third codebook corresponding to the same number of transmission layers, and the third codebook is a codebook specified by a protocol; The first codebook is determined based on one or more of the second codebooks. The method according to claim 4, characterized in that the second codebook is composed of some codewords in the third codebook; The second codebook is pre-configured in at least one of the following ways: Selecting a second number of codewords from the third codebook according to a first preset order to form the second codebook, wherein the first preset order is determined by cosine similarity between different codewords in the third codebook; Selecting a second number of codewords from the third codebook based on the first parameter and the second parameter to form the second codebook, wherein the first parameter and the second parameter are parameters required to determine the codeword during downlink communication; Selecting a second number of codewords from the third codebook according to a second preset order to form the second codebook, wherein the second preset order is the order in which the codewords in the third codebook are arranged; Selecting the 2X-1th codeword in the third codebook to form the second codebook, wherein X is a positive integer; Selecting the 2Xth codeword in the third codebook to form the second codebook. The method according to claim 4 or 5 is characterized in that the number of codewords in the second codebook corresponding to each number of transmission layers is determined based on a preset rule. The method according to any one of claims 3 to 6, characterized in that the antenna port division method includes at least one of the following methods: Divide into 1 antenna port group, each antenna port group has 8 antenna ports; Divide into 2 antenna port groups, each antenna port group has 4 antenna ports; Divide into 4 antenna port groups, each antenna port group has 2 antenna ports; The antenna port group is divided into 8 groups, and each group has 1 antenna port. An uplink communication method, characterized in that the method comprises: Sending first information, where the first information is used to indicate a codeword used for uplink communication; At least one of an uplink reference signal and an uplink channel is received, wherein the at least one of the uplink reference signal and the uplink channel is sent based on the codeword. The method according to claim 8 is characterized in that the first information is used to indicate a transmission rank indication TRI and a transmission precoding matrix indication TPMI, the TRI is used to indicate the number of transmission layers, the TPMI is used to indicate the precoding matrix, and the number of transmission layers and the precoding matrix are used to jointly indicate the codeword. The method according to claim 9, characterized in that the number of transmission layers and the precoding matrix jointly indicate the codeword, comprising: Determine, based on an antenna port division method of the terminal, a first number of preconfigured first codebooks, wherein the first number of first codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and the number of codewords in the first number of first codebooks is less than or equal to a first threshold; Determine a target codebook from the first number of first codebooks according to the TRI; The codeword is determined based on the TPMI and the target codebook. The method according to claim 10, characterized in that the first codebook is preconfigured in the following manner: Determine, based on the antenna port division method of the terminal, a first number of pre-configured second codebooks, wherein the first number of second codebooks are codebooks corresponding to different numbers of transmission layers under the same antenna port division method, and a codeword in the second codebook is less than or equal to a codeword in a third codebook corresponding to the same number of transmission layers, and the third codebook is a codebook specified by a protocol; The first codebook is determined based on one or more of the second codebooks. The method according to claim 11, characterized in that the second codebook is composed of some codewords in the third codebook; The second codebook is pre-configured in at least one of the following ways: Selecting a second number of codewords from the third codebook according to a first preset order to form the second codebook, wherein the first preset order is determined by cosine similarity between different codewords in the third codebook; Selecting a second number of codewords from the third codebook based on a first parameter and a second parameter to form the second codebook, wherein the first parameter and the second parameter are parameters required to determine a codeword during downlink communication; Selecting a second number of codewords from the third codebook according to a second preset order to form the second codebook, wherein the second preset order is the order in which the codewords in the third codebook are arranged; Selecting the 2X-1th codeword in the third codebook to form the second codebook, wherein X is a positive integer; Selecting the 2Xth codeword in the third codebook to form the second codebook. The method according to claim 11 or 12 is characterized in that the number of codewords in the second codebook corresponding to each number of transmission layers is determined based on a preset rule. The method according to any one of claims 10 to 13, characterized in that the antenna port division method includes at least one of the following methods: Divide into 1 antenna port group, each antenna port group has 8 antenna ports; Divide into 2 antenna port groups, each antenna port group has 4 antenna ports; Divide into 4 antenna port groups, each antenna port group has 2 antenna ports; The antenna port group is divided into 8 groups, and each group has 1 antenna port. An uplink communication method, characterized in that the method comprises: The network device sends first information to the terminal, where the first information is used to indicate a codeword used for uplink communication; The terminal receives the first information; The terminal sends at least one of an uplink reference signal and an uplink channel based on the codeword; The network device receives at least one of the uplink reference signal and the uplink channel. A terminal, characterized in that it comprises: a transceiver module; The transceiver module is used to receive first information, where the first information is used to indicate a codeword used for uplink communication; The transceiver module is further configured to send at least one of an uplink reference signal and an uplink channel based on the codeword. A network device, characterized in that it comprises: a transceiver module; The transceiver module is used to send first information, where the first information is used to indicate a codeword used for uplink communication; The transceiver module is further configured to receive at least one of an uplink reference signal and an uplink channel, wherein at least one of the uplink reference signal and the uplink channel is sent based on the codeword. A terminal, characterized by comprising: one or more processors; The terminal is used to execute the uplink communication method according to any one of claims 1 to 7. A network device, comprising: one or more processors; Wherein, the network device is used to execute the uplink communication method described in any one of claims 8-14. A communication system, characterized in that it includes a terminal and a network device, wherein the terminal is configured to implement the uplink communication method described in any one of claims 1-7, and the network device is configured to implement the uplink communication method described in any one of claims 8-14. A storage medium storing instructions, characterized in that when the instructions are executed on a communication device, the communication device executes an uplink communication method as described in any one of claims 1-7 or 8-14.