Communication method, and terminal, network device and storage medium

Abstract

The present disclosure relates to a communication method, and a terminal, a network device and a storage medium. The communication method comprises: a terminal determining a first joint transmission configuration indicator (TCI) state, wherein the first joint TCI state is used for downlink transmissions in an asymmetric downlink-single-transmission / reception-point (TRP) and uplink-multi-TRP scenario. The present disclosure can improve communication efficiency.

Description

Communication methods, terminals, network devices and storage media Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to communication methods, terminals, network devices and storage media. Background Technology

[0002] Currently, two mechanisms have been designed for beam indication: joint beam indication and separate beam indication. For example, the joint beam indication method allows the user to indicate a joint Transmission Configuration Indicator (TCI) state, used to determine both the downlink and uplink transmission beams. Conversely, the separate beam indication method allows the user to indicate the downlink and uplink transmission beams separately.

[0003] Summary of the Invention

[0004] However, existing beam pointing methods may suffer from low communication efficiency.

[0005] This disclosure presents a communication method, a terminal, a network device, and a storage medium.

[0006] According to a first aspect of the present disclosure, a communication method is proposed, the method comprising: a terminal determining a first joint transmission configuration indication state (TCI state), the first joint TCI state being used for downlink transmission in asymmetric downlink single TRP and uplink multi-TRP scenarios.

[0007] According to a second aspect of the present disclosure, a communication method is proposed, the method comprising: a network device sending first information or second information to a terminal; the first information being used to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multiple TRP scenario; the second information being used to determine a first joint TCI state; the first joint TCI state being used for downlink transmission in the asymmetric downlink single TRP and uplink multiple TRP scenario.

[0008] According to a third aspect of the present disclosure, a communication method is proposed, the method comprising: a network device sending first information or second information to a terminal; the terminal determining a first joint TCI state based on the first information or the second information; the first information being used to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario; the second information being used to determine the first joint TCI state; the first joint TCI state being used for downlink transmission in the asymmetric downlink single TRP and uplink multi-TRP scenario.

[0009] According to a fourth aspect of the present disclosure, a terminal is provided, comprising: a processing module, configured to determine a first joint transmission configuration indication state (TCI state), the first joint TCI state being used for downlink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios.

[0010] According to a fifth aspect of the present disclosure, a network device is provided, comprising: a transceiver module, configured to send first information or second information to a terminal; the first information is configured to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multiple TRP scenario; the second information is configured to determine a first joint TCI state; the first joint TCI state is used for downlink transmission in the asymmetric downlink single TRP and uplink multiple TRP scenario.

[0011] According to a sixth aspect of the present disclosure, a terminal is provided, comprising: one or more processors; wherein the terminal is configured to execute the first aspect and any one of the communication methods in the first aspect.

[0012] According to a seventh aspect of the present disclosure, a network device is provided, comprising: one or more processors; wherein the network device is configured to perform the second aspect and any one of the communication methods in the second aspect.

[0013] According to an eighth aspect 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 communication methods in the first aspect, and the network device is configured to implement the second aspect and any one of the communication methods in the second aspect.

[0014] According to a ninth aspect of the present disclosure, a storage medium is provided that stores instructions, which, when executed on a communication device, cause the communication device to perform a communication method as described in the first aspect and any one of the first aspects or the second aspect and any one of the second aspects.

[0015] According to a tenth aspect of the present disclosure, a program product is provided, including a computer program that, when executed by a communication device, causes the communication device to perform a communication method as described in the first aspect and any one of the first aspects or the second aspect and any one of the second aspects.

[0016] This disclosure enables the terminal to determine the first joint TCI state for downlink transmission in asymmetric DL STRP and UL MTRP scenarios, thereby allowing the terminal to select a suitable joint TCI state for downlink transmission in asymmetric DL STRP and UL MTRP scenarios and improve communication efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings required for the description of the embodiments are introduced below. The following drawings are only some embodiments of this disclosure and do not impose specific limitations on the protection scope of this disclosure.

[0018] Figure 1a is a schematic diagram of MP-MTRP transmission under S-DCI scheduling.

[0019] Figure 1b is a schematic diagram of MP-MTRP transmission under M-DCI scheduling.

[0020] Figure 1c is a schematic diagram of a communication system architecture according to an embodiment of the present disclosure.

[0021] Figure 1d is a schematic diagram of a communication system illustrating an exemplary embodiment of the present disclosure.

[0022] Figure 1e is a schematic diagram of a communication system illustrating an exemplary embodiment of the present disclosure.

[0023] Figure 2a is a schematic diagram of a communication method interaction according to an embodiment of the present disclosure.

[0024] Figure 2b is a schematic diagram of a communication method interaction according to an embodiment of the present disclosure.

[0025] Figure 2c is a schematic diagram of a communication method interaction according to an embodiment of the present disclosure.

[0026] Figure 2d is a schematic diagram of a communication method interaction according to an embodiment of the present disclosure.

[0027] Figure 2e is a schematic diagram of a communication method interaction according to an embodiment of the present disclosure.

[0028] Figure 3a is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0029] Figure 3b is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0030] Figure 3c is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0031] Figure 3d is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0032] Figure 3e is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0033] Figure 4a is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0034] Figure 4b is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0035] Figure 4c is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0036] Figure 5 is a schematic diagram of a communication method interaction according to an embodiment of the present disclosure.

[0037] Figure 6a is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure.

[0038] Figure 6b is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure.

[0039] Figure 7a is a schematic diagram of the structure of a communication device proposed in an embodiment of this disclosure.

[0040] Figure 7b is a schematic diagram of the chip structure proposed in an embodiment of this disclosure. Detailed Implementation

[0041] This disclosure presents a communication method, a terminal, a network device, and a storage medium.

[0042] In a first aspect, embodiments of this disclosure propose a communication method, the method comprising: a terminal determining a first joint transmission configuration indication state (joint TCI state), the first joint TCI state being used for downlink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios.

[0043] In the above embodiments, the terminal determines the first joint TCI state for downlink transmission in asymmetric DL STRP and UL MTRP scenarios, thereby enabling the terminal to select a suitable joint TCI state for downlink transmission in asymmetric DL STRP and UL MTRP scenarios and improve communication efficiency.

[0044] In some alternative embodiments of the first aspect, the first joint TCI state is determined as follows: the terminal determines that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario; the terminal determines a predefined first joint TCI state from the second joint TCI state configured by the network device, wherein the first joint TCI state is one of the second joint TCI states.

[0045] In the above embodiments, the network device can indicate the communication scenario as an asymmetric downlink single TRP and uplink multi-TRP scenario through the first information, so that the terminal can determine the communication scenario as an asymmetric downlink single TRP and uplink multi-TRP scenario. For the asymmetric downlink single TRP and uplink multi-TRP scenario, a predefined first joint TCI state can be determined to improve communication efficiency. In this embodiment, the network device only needs to indicate the communication scenario, and the terminal determines the first joint TCI state itself, saving the resources required for the network device to separately indicate the first joint TCI state.

[0046] In some alternative embodiments of the first aspect, the first joint TCI state is determined as follows: the terminal receives second information sent by the network device; the terminal determines the first joint TCI state based on the second information.

[0047] In the above embodiments, the network device can flexibly configure, activate, or indicate the first joint TCI state through the second information to improve flexibility. Furthermore, the terminal may not be certain whether the communication scenario is an asymmetric downlink single TRP or uplink multi-TRP scenario; it can directly use the first joint TCI state configured (or activated or indicated) based on the second information for downlink transmission, reducing the terminal's power consumption.

[0048] In some alternative embodiments of the first aspect, the second information includes at least one of the following: newly added Radio Resource Control (RRC) signaling, which is used to configure the first joint TCI state; Media Access Control (MAC) CE, which is used to activate the first joint TCI state; and Downlink Control Information (DCI), which is used to indicate the first joint TCI state.

[0049] In the above embodiments, the network device can configure the first joint TCI state via RRC, activate the first joint TCI state via MAC CE, and indicate the joint TCI state via DCI to improve flexibility and cope with more situations.

[0050] In some alternative embodiments of the first aspect, the second information includes a MAC CE, and the method further includes: the terminal receiving third information sent by the network device, the third information being used to deactivate the first joint TCI state.

[0051] In the above embodiments, if the second information is MAC CE, that is, MAC CE activates the first joint TCI state, the network device can also send a third information to deactivate the first joint TCI state, so as to flexibly realize the activation and deactivation of the first joint TCI state.

[0052] In some optional embodiments of the first aspect, the first joint TCI state is determined in at least one of the following ways: a second joint TCI state with an associated path loss offset value of zero is determined as the first joint TCI state; a second joint TCI state without an associated path loss offset value is determined as the first joint TCI state; wherein the second joint TCI state is configured by the network device, the path loss offset value is used together with the downlink path loss estimate of the first TRP to determine the path loss estimate of the second TRP, the first TRP is a TRP used for uplink transmission and / or downlink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios, and the second TRP is a TRP used only for uplink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios.

[0053] In the above embodiments, the terminal can determine the first joint TCI state for downlink transmission itself. For example, the first joint TCI state can be determined based on the path loss offset value associated with the second joint TCI state, thereby improving communication efficiency.

[0054] In some alternative embodiments of the first aspect, the first joint TCI state is determined as follows: the second joint TCI state configured by the network device, wherein the newly added bit is a preset bit value, is determined as the first joint TCI state.

[0055] In the above embodiments, the terminal can determine the first joint TCI state for downlink transmission itself. For example, the first joint TCI state can be determined based on the additional bits of the second joint TCI state, thereby improving communication efficiency.

[0056] In some alternative embodiments of the first aspect, the first joint TCI state is used for the transmission of all channels and signals for downlink transmission.

[0057] In the above embodiment, the first joint TCI state is used for the transmission of all channels and signals in downlink transmission, thereby improving communication efficiency.

[0058] In a second aspect, a communication method is provided, the method comprising: a network device sending first information or second information to a terminal; the first information being used to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multiple TRP scenario; the second information being used to determine a first joint TCI state; the first joint TCI state being used for downlink transmission in the asymmetric downlink single TRP and uplink multiple TRP scenario.

[0059] In some alternative embodiments of the second aspect, the second information includes at least one of the following: newly added Radio Resource Control (RRC) signaling, which is used to configure the first joint TCI state; Media Access Control (MAC) CE, which is used to activate the first joint TCI state; and Downlink Control Information (DCI), which is used to indicate the first joint TCI state.

[0060] In some alternative embodiments of the second aspect, the second information includes a MAC CE, and the method further includes: the network device sending third information to the terminal, the third information being used to deactivate the first joint TCI state.

[0061] In some alternative embodiments of the second aspect, the method further includes: the network device configuring at least one second joint TCI state to the terminal, the second joint TCI state being used to determine a first joint TCI state; wherein the second joint TCI state is associated with a path loss offset value, and / or, the second joint TCI state includes newly added bits, the newly added bits being used to indicate whether the second joint TCI state is the first joint TCI state.

[0062] Thirdly, a communication method is provided, the method comprising: a network device sending first information or second information to a terminal; the terminal determining a first joint TCI state based on the first information or the second information; the first information being used to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario; the second information being used to determine the first joint TCI state; the first joint TCI state being used for downlink transmission in the asymmetric downlink single TRP and uplink multi-TRP scenarios.

[0063] Fourthly, a terminal is provided, comprising: a processing module, configured to determine a first joint transmission configuration indication state (joint TCI state), the first joint TCI state being used for downlink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios.

[0064] In some optional embodiments of the fourth aspect, the processing module determines the first joint TCI state in the following manner: determining that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario; determining a predefined first joint TCI state from the second joint TCI state configured by the network device, wherein the first joint TCI state is one of the second joint TCI states.

[0065] In some optional embodiments of the fourth aspect, the transceiver module is further configured to: receive second information sent by the network device; and the processing module determines the first joint TCI state in the following manner: the terminal determines the first joint TCI state based on the second information.

[0066] In some alternative embodiments of the fourth aspect, the second information includes at least one of the following: newly added Radio Resource Control (RRC) signaling, which is used to configure the first joint TCI state; Media Access Control (MAC) CE, which is used to activate the first joint TCI state; and Downlink Control Information (DCI), which is used to indicate the first joint TCI state.

[0067] In some alternative embodiments of the fourth aspect, the second information includes a MAC CE, and the transceiver module is further configured to: receive third information sent by the network device, the third information being used to deactivate the first joint TCI state.

[0068] In some optional embodiments of the fourth aspect, the processing module determines the first joint TCI state in at least one of the following ways: determining the second joint TCI state with an associated path loss offset value of zero as the first joint TCI state; determining the second joint TCI state without an associated path loss offset value as the first joint TCI state; wherein the second joint TCI state is configured by the network device, the path loss offset value is used together with the downlink path loss estimate of the first TRP to determine the path loss estimate of the second TRP, the first TRP is a TRP used for uplink transmission and / or downlink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios, and the second TRP is a TRP used only for uplink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios.

[0069] In some optional embodiments of the fourth aspect, the processing module determines the first joint TCI state in the following manner: the second joint TCI state configured by the network device, wherein the newly added bit is a preset bit value, is determined as the first joint TCI state.

[0070] In some alternative embodiments of the fourth aspect, the first joint TCI state is used for the transmission of all channels and signals for downlink transmission.

[0071] Fifthly, a network device is provided, comprising: a transceiver module, used by the network device to send first information or second information to a terminal; the first information is used to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multiple TRP scenario; the second information is used to determine a first joint TCI state; the first joint TCI state is used for downlink transmission in the asymmetric downlink single TRP and uplink multiple TRP scenario.

[0072] In some alternative embodiments of the fifth aspect, the second information includes at least one of the following: newly added Radio Resource Control (RRC) signaling, which is used to configure the first joint TCI state; Media Access Control (MAC) CE, which is used to activate the first joint TCI state; and Downlink Control Information (DCI), which is used to indicate the first joint TCI state.

[0073] In some alternative embodiments of the fifth aspect, the second information includes a MAC CE, and the transceiver module is further configured to: send third information from the network device to the terminal, the third information being used to deactivate the first joint TCI state.

[0074] In some optional embodiments of the fifth aspect, the transceiver module is further configured to: configure at least one second joint TCI state to the terminal, the second joint TCI state being used to determine the first joint TCI state; wherein the second joint TCI state is associated with a path loss offset value, and / or, the second joint TCI state includes newly added bits, the newly added bits being used to indicate whether the second joint TCI state is the first joint TCI state.

[0075] A sixth aspect provides a terminal, comprising: one or more processors; wherein the terminal is configured to execute the first aspect and any one of the communication methods in the first aspect.

[0076] A seventh aspect provides a network device, comprising: one or more processors; wherein the network device is configured to perform the second aspect and any one of the communication methods in the second aspect.

[0077] Eighthly, 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 communication methods in the first aspect, and the network device is configured to implement the second aspect and any one of the communication methods in the second aspect.

[0078] Ninth aspect, a storage medium is provided that stores instructions, which, when executed on a communication device, cause the communication device to perform a communication method as described in the first aspect and any one thereof, or the second aspect and any one thereof.

[0079] In a tenth aspect, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to perform the method as described in an optional implementation of the first or second aspect.

[0080] In one aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the methods described in an optional implementation of the first or second aspect.

[0081] In a twelfth aspect, embodiments of this disclosure provide a chip or chip system. The chip or chip system includes processing circuitry configured to perform the method described in an optional implementation of the first or second aspect above.

[0082] It is understood that the terminals, access network devices, first network elements, other network elements, core network devices, communication systems, storage media, program products, computer programs, chips, or chip systems involved in the embodiments of this disclosure are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects that can be achieved can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0083] This disclosure provides communication methods, terminals, network devices, and storage media. In some embodiments, the terms "communication method" and "information processing method" can be used interchangeably, as can the terms "communication device" and "information processing device" and "communication device," and the terms "information processing system" and "communication system."

[0084] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular 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 particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0085] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. The technical environments of different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0086] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0087] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the aforementioned," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0088] In the embodiments disclosed herein, "multiple" refers to two or more.

[0089] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0090] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of B); in some embodiments, B (execute B regardless 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). The same applies when there are more branches such as A, B, C, etc.

[0091] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0092] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0093] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0094] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0095] 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 lower than,” and “above” can be used interchangeably, as can the terms “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,” “not higher than,” and “below”.

[0096] In some embodiments, the apparatus and device 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", "body", etc.

[0097] In some embodiments, "network" can be interpreted as devices included in the network, such as access network devices, core network devices, etc.

[0098] 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," or "fixed station." In some embodiments, it may also be understood as "node," "access point," "transmission point (TP)," "reception point (RP)," "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," or "bandwidth part (BWP)."

[0099] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)," "user terminal," "mobile station (MS)," "mobile terminal (MT)," "subscriber station," "mobile unit," "subscriber unit," "wireless unit," "remote unit," "mobile device," "wireless device," "wireless communication device," "remote device," "mobile subscriber station," "access terminal," "mobile terminal," "wireless terminal," "remote terminal," "handset," "user agent," "mobile client," "client," etc.

[0100] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0101] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0102] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0103] For ease of understanding, this disclosure introduces the following concepts:

[0104] 1) Multi-TRP Transmission: To improve coverage at cell edges and provide a more balanced quality of service within the service area, multi-point collaboration remains an important technique in New Radio (NR) systems. From a network architecture perspective, deploying the network with a large number of distributed access points and centralized baseband processing is more conducive to providing a balanced user experience rate and significantly reducing latency and signaling overhead caused by handover. As the frequency band increases, a relatively dense deployment of access points is also required to ensure network coverage. In the high-frequency band, with the increasing integration of active antenna equipment, modular active antenna arrays will be more favored. Each TRP's antenna array can be divided into several relatively independent antenna panels, so the overall array shape and number of ports can be flexibly adjusted according to the deployment scenario and service requirements. Antenna panels or TRPs can also be connected by optical fibers for more flexible distributed deployment. In the millimeter-wave band, as the wavelength decreases, the obstruction effect caused by obstacles such as people or vehicles will be more significant. In this case, from the perspective of ensuring the robustness of the link connection, the cooperation between multiple TRPs or panels can be used to transmit / receive from multiple beams at multiple angles, thereby reducing the adverse effects of the blocking effect.

[0105] Based on the mapping relationship between transmitted signal streams and multiple TRPs / panels, multi-point cooperative transmission technology can be divided into coherent and incoherent transmission. In coherent transmission, each data layer is mapped to multiple TRPs / panels via a weighted vector. In incoherent transmission, each data stream is mapped to only a subset of TRPs / panels. Coherent transmission places higher demands on synchronization between transmission points and the transmission capacity of the backhaul link, making it more sensitive to many non-ideal factors in real-world deployment conditions. In contrast, incoherent transmission is less affected by these factors and is therefore a preferred solution for multi-point transmission technology.

[0106] For the uplink, the actual spatial characteristics of the physical uplink shared channel (PUSCH) traversed by different transmission directions may vary greatly. Therefore, it is assumed that the quasi co-location type D (QCL-D) of the PUSCH is different for different transmission directions.

[0107] 2) Uplink Enhancement: Previously, uplink enhancement did not consider MTRP scenarios, and uplink transmission was STRP. With development, uplink transmission of MTRP under single-downlink control information (S-DCI) has been enhanced, with uplink PUSCH transmission sent to TRPs of multiple base stations. Cooperative transmission under time division multiplexing (TDM) transmission mode has also been standardized. By sending different repetitions of the same information on the PUSCH to different TRPs of the base station at different time-domain transmission occasions (TO), this method has relatively low requirements for terminal capabilities. Each TO only needs to send the PUSCH / physical uplink control channel (PUCCH) of one TRP, and does not require the ability to transmit beams simultaneously, but the transmission delay is relatively large.

[0108] Currently, uplink enhancement primarily aims to increase transmission reliability and throughput by enabling simultaneous cooperative transmission from multiple terminal panels to multiple base station TRPs, while effectively reducing transmission latency under multiple TRPs. However, this requires the terminal to have the ability to transmit multiple beams simultaneously. PUSCH transmission can be based on a single PDCCH, i.e., S-DCI-scheduled multi-panel / TRP transmission, as shown in Figure 1a. Figure 1a is a schematic diagram of multi-panel-multi-TRP (MP-MTRP) transmission under S-DCI scheduling. In Figure 1a, uplink transmission between terminal panel 1 and TRP1 is performed through one or more layers, and downlink transmission is performed through transmitted precoding matrix indicator 1 (TPMI1). Downlink transmission between terminal panel 2 and TRP2 is performed through one or more layers, and uplink transmission is performed through TPMI2. Multi-panel / TRP transmission can also be scheduled based on different physical downlink control channels (PDCCHs), i.e., multi-downlink control information (M-DCI), as shown in Figure 1b. Figure 1b is a schematic diagram of MP-MTRP transmission under M-DCI scheduling. In Figure 1b, downlink transmission between panel 1 and TRP1 of the terminal is based on PDCCH1, and uplink transmission is based on PUSCH1. Downlink transmission between panel 2 and TRP2 of the terminal is based on PDCCH2, and uplink transmission is based on PUSCH2.

[0109] In actual deployments, the links between transmission points may be relatively ideal backhaul links that support high throughput and very low backhaul latency, or they may be non-ideal backhaul links that use methods such as x-digital subscriber line (xDSL), microwave, and relay. The non-coherent joint transmission (NC-JT) scheme based on M-DCI was initially introduced mainly for non-ideal backhaul situations, but this scheme can also be used for ideal backhaul situations.

[0110] The current design considers a backhaul connection between the gNB and the uplink receiving node (UL Rx Node), initially focusing on the ideal backhaul scenario. The corresponding UL transmission scheme might be:

[0111] For STRP:

[0112] Select the primary base station (macro gNB);

[0113] Select a specific UL TRP;

[0114] For MTRP:

[0115] Select a macro gNB and a UL TRP;

[0116] Select two UL TRPs;

[0117] Select macro gNB and two of the UL TRPs.

[0118] 3) Transmission Configuration Indicator State (TCI state): The standard is that the downlink TCI state or combined TCI state indicated by the UE is used to determine the downlink transmission beam, and the uplink TCI state or combined TCI state is used to determine the uplink beam. Here, the downlink beam refers to the beam of all / part of the PDCCH in the user-specific physical downlink shared channel (PDSCH) and control channel (CC), and the uplink beam refers to the uplink transmit space filter based on the dynamically licensed / configurable licensed PUSCH and all or part of the dedicated PUCCH resources of the CC.

[0119] A single TCI state pool is used for both the downlink TCI state and the joint TCI state in the independent beam indication.

[0120] For joint beam indication, the TCI field only needs to indicate one joint TCI state, which is used to determine both uplink and downlink transmission beams. However, for independent beam indication, the downlink and uplink transmission beams are no longer the same and need to be indicated separately. Furthermore, there are three scenarios: needing to indicate both downlink and uplink transmission beams for the user simultaneously, needing to indicate only the downlink transmission beam for the user, or needing to indicate only the uplink beam for the user. Therefore, the mapping relationship between the TCI field and TCI state in DCI formats 1_1 / 1_2 is defined as follows for independent beam indication:

[0121] One code point in the TCI domain can correspond to both a downlink TCI state and an uplink TCI state.

[0122] One code point in the TCI domain corresponds to only one downlink TCI state. At this time, the user keeps the current UL TCI state unchanged.

[0123] One code point in the TCI domain corresponds to only one uplink TCI state, and the user keeps the current DL TCI state unchanged.

[0124] Currently, the defined TCI state indication method has been expanded. Up to two cooperative TRPs' uplink and downlink TCI state information can be indicated simultaneously via TCI state code points in the DCI.

[0125] In a UL-only scenario, a cell consists of a primary gNB and multiple UL TRP receivers. For a terminal to perform downlink STRP / uplink MTRP transmission, the base station needs to perform uplink / downlink beam management and indicate the beam information used for data / signal transmission to the terminal. Uplink MTRP transmission can be completed collaboratively between the primary gNB and the UL TRP, or collaboratively between different UL TRPs.

[0126] Currently supported unified TCI modes include the ability to configure either a joint TCI state or a separate TCI state in Frequency Range 1 (FR1), while only the separate TCI state is allowed in Frequency Range 2 (FR2). The conclusion is as follows:

[0127] For FR1: A combined TCI state or {a DL TCI state + a UL TCI state} can be applied.

[0128] For FR2: {one DL TCI state + one UL TCI state} can be applied.

[0129] For FR1: Up to two combined TCI states or {one DL TCI state + up to two UL TCI states} can be applied.

[0130] For FR2: {one DL TCI state + up to two UL TCI states} can be applied.

[0131] Currently, two mechanisms have been designed for beam indication: joint beam indication and separate beam indication. For example, the joint beam indication method allows the user to configure a joint transmission configuration indicator state (joint TCI state) to determine both the downlink and uplink transmission beams. Conversely, the separate beam indication method allows the user to configure separate transmission configuration indicator states (separate TCI state), indicating the downlink and uplink transmission beams separately.

[0132] However, in asymmetric downlink single transmission and receiving point (DL STRP) and uplink multi transmission and receiving point (UL MTRP) scenarios, if the joint TCI state mode is configured, since UL only TRP does not support downlink transmission, it is uncertain which TCI will be used for downlink STRP transmission. Therefore, a solution to this problem needs to be considered.

[0133] Therefore, this disclosure provides a communication method that determines the first joint TCI state for downlink transmission in asymmetric DL STRP and UL MTRP scenarios through a terminal, enabling the terminal to select a suitable joint TCI state for downlink transmission in asymmetric DL STRP and UL MTRP scenarios, thereby improving communication efficiency.

[0134] Figure 1c is a schematic diagram of a communication system architecture according to an embodiment of the present disclosure.

[0135] As shown in Figure 1c, the communication system 100 includes a terminal 101 and a network device 102.

[0136] In some embodiments, terminal 101 includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0137] In some embodiments, network device 102 may include at least one of access network device and core network device.

[0138] In some embodiments, the access network device is, for example, a node or device that connects a terminal to a wireless network. The access network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system.

[0139] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0140] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0141] In some embodiments, a core network device may be a single device comprising one or more network elements, or it may be multiple devices or a group of devices, each comprising all or part of the aforementioned one or more network elements. Network elements may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), or a Next Generation Core (NGC).

[0142] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions proposed in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions proposed in this disclosure are also applicable to similar technical problems.

[0143] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1c, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1c are illustrative. The communication system may include all or some of the main bodies in FIG1c, or it may include other main bodies outside of FIG1c. The number and form of each main body are arbitrary. Each main body may be physical or virtual. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0144] Figure 1d is a schematic diagram of a communication system illustrating an exemplary embodiment of this disclosure. As shown in Figure 1d, it includes a terminal, a UL TRP, and a main gNB. The UL TRP can be referred to as a UL-only TRP, i.e., a second TRP. The main gNB can also be referred to as a DL TRP, i.e., a first TRP.

[0145] Figure 1e is a schematic diagram of a communication system illustrating an exemplary embodiment of this disclosure. As shown in Figure 1e, different UEs can transmit based on dynamic point switch (DPS). Only UL transmission exists between the UE and the UL-only TRP. UL and downlink (DL) transmissions exist between the UE and the primary gNB. When different UL-only TRPs receive uplink transmissions from the same UE, they can perform joint reception. The primary gNB and the UL-only TRP can communicate via TRP-specific reception.

[0146] The embodiments disclosed herein can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), 5G New Radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems utilizing other communication methods, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0147] Figure 2a is a schematic diagram of a communication method interaction according to an embodiment of the present disclosure. As shown in Figure 2a, this embodiment of the present disclosure relates to a communication method for a communication system 100, the method including:

[0148] In step S2101, network device 102 configures the second joint TCI state to terminal 101.

[0149] In some embodiments, terminal 101 receives a second joint TCI state configured by the network device.

[0150] In some embodiments, the second joint TCI state can be one or more.

[0151] In some embodiments, the second joint TCI state can be used by the terminal to determine the beam used for uplink and / or downlink transmissions. The terminal can determine a first joint TCI state based on the second joint TCI state, the first joint TCI state being used for downlink transmissions in asymmetric downlink single TRP and uplink multi-TRP scenarios. For example, one of at least one second joint TCI state can be determined as the first joint TCI state.

[0152] It is understood that step S2101 is optional. In embodiments of this disclosure, if the first joint TCI state can be determined from the second joint TCI state, then step S2101 can be performed.

[0153] In embodiments of this disclosure, even if the first joint TCI state is determined from the second joint TCI state, the second joint TCI state can be pre-configured, meaning the network device does not configure the second joint TCI state every time the first joint TCI state is determined, in which case step S2101 can be omitted. In embodiments of this disclosure, the first joint TCI state can be determined based on other methods, in which case step S2101 can be omitted.

[0154] In step S2102, terminal 101 determines the first joint TCI state.

[0155] In some embodiments, the first joint TCI state is used for downlink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios.

[0156] In some embodiments, the first joint TCI state can also be used for uplink transmission of the first TRP.

[0157] In some embodiments, the terminal may designate one of a plurality of second joint TCI states as the first joint TCI state, and the remaining second joint TCI states other than the one designated as the first joint TCI state may be used for uplink transmission of the second TRP.

[0158] In some embodiments, the first joint TCI state is determined as follows: The terminal determines that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. The terminal determines a predefined first joint TCI state from the second joint TCI states configured by the network device. The first joint TCI state is one of the second joint TCI states. For example, when the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario, the network device can indicate the communication scenario to the terminal. After the terminal determines that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario, it can determine the predefined first joint TCI state from the second joint TCI states. The predefined first joint TCI state can be, for example, the first state in the second joint TCI states; that is, the terminal can determine the first state in the second joint TCI states as the first joint TCI state. In other words, after determining that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario, the terminal can default to using the first state in the second joint TCI states for downlink transmission. Of course, the predefined first joint TCI state being the first of the second joint TCI states is merely an exemplary case exemplified in this embodiment, and this disclosure is not limited thereto.

[0159] In some embodiments, the communication scenario may include STRP scenario, MTRP scenario, asymmetric downlink single TRP and uplink multiple TRP scenario, etc., but is not limited to these.

[0160] In some embodiments, network devices can dynamically switch between multiple communication scenarios. For example, a network device may have multiple TRPs, each used for uplink and / or downlink transmission; this can be considered an MTRP scenario. When downlink transmission of a certain TRP is disabled, that TRP becomes a UL-only TRP, used only for uplink transmission, and can also be referred to as the second TRP. At this time, the communication scenario switches to an asymmetric downlink single TRP and uplink multi-TRP scenario. In the asymmetric downlink single TRP and uplink multi-TRP scenario, the network device has a second TRP and a first TRP. The second TRP is the TRP among the network device's multiple TRPs with downlink transmission disabled, and the first TRP is the TRP among the network device's multiple TRPs with downlink transmission not disabled; the first TRP is used for uplink and / or downlink transmission. When downlink transmission of the second TRP is enabled, the communication scenario switches back to the MTRP scenario. For example, when the communication scenario switches to an asymmetric downlink single TRP and uplink multiple TRP scenario, the network device can send first information to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multiple TRP scenario.

[0161] In some embodiments, the communication scenario of the network device can be fixed as an asymmetric downlink single TRP and uplink multi-TRP scenario. For example, a certain TRP of the network device only supports uplink transmission. Then, when the terminal accesses the network, the network device can send first information to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario.

[0162] It is understood that the examples given in this disclosure for several communication scenarios, namely asymmetric downlink single TRP and uplink multi TRP scenarios, are merely illustrative and are not intended to limit the scope of this disclosure.

[0163] In some embodiments, the terminal determines that the communication scenario is an asymmetric downlink single TRP and uplink multiple TRP scenario. This can be achieved by the terminal receiving first information sent by the network device, whereby the first information indicates that the communication scenario is an asymmetric downlink single TRP and uplink multiple TRP scenario. The first information may, for example, be an RRC (Reference Rate Code).

[0164] It is understandable that the terminal can also determine the communication scenario as an asymmetric downlink single TRP and uplink multi TRP scenario through other means, and this disclosure does not limit it.

[0165] In some embodiments, the first joint TCI state is determined as follows: the terminal receives second information sent by the network device. The terminal determines the first joint TCI state based on the second information. The second information is used to determine the first joint TCI state. For example, the network device may not indicate the communication scenario to the terminal; that is, the terminal may not be aware that the current communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. The network device directly configures (or indicates or activates) the first joint TCI state through the second information.

[0166] In some embodiments, the second information includes at least one of the following: a newly added RRC signaling, which is used to configure the first joint TCI state; a MAC CE, which is used to activate the first joint TCI state; and a DCI, which is used to indicate the first joint TCI state.

[0167] Optionally, the second information includes newly added RRC signaling. RRC signaling can be used to configure a first joint TCI state for downlink transmission. The terminal can then perform downlink transmission based on the first joint TCI state configured by RRC.

[0168] Optionally, the second information includes a MAC CE. The MAC CE can be used to activate the first joint TCI state. For example, the network device can pre-configure the first joint TCI state and activate it via MAC CE when the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. As another example, the network device can activate one of the second joint TCI states as the first joint TCI state.

[0169] Optionally, the second information includes a DCI. The DCI can be used to indicate the first joint TCI state. For example, an indicator field can be added to the DCI to indicate the first joint TCI state when the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. For example, one of the second joint TCI states configured by the network device can be indicated as the first joint TCI state. Another example is that one of multiple second joint TCI states activated by MAC CE can be indicated as the first joint TCI state. The indicator field added to the DCI can be 1 bit, but is not limited to this.

[0170] In some embodiments, if the second information includes a MAC CE, the terminal can also receive third information sent by the network device. This third information is used to deactivate the first joint TCI state. For example, the third information can be a MAC CE. When the communication scenario switches from an asymmetric downlink single TRP and uplink multi-TRP scenario to other scenarios, the network device can deactivate the first joint TCI state via the MAC CE. For example, when switching from an asymmetric downlink single TRP and uplink multi-TRP scenario to an MTRP scenario, the first joint TCI state can be deactivated, but this is not a limitation.

[0171] In some embodiments, a second joint TCI state can be associated with a path loss offset value. This path loss offset value is used, together with the downlink path loss estimate of the first TRP, to determine the path loss estimate of the second TRP. For example, the downlink path loss estimate of the first TRP is added to or subtracted from the path loss offset value to obtain the path loss estimate of the second TRP. The first TRP is a TRP used for uplink and / or downlink transmission in asymmetric downlink single TRP and uplink multi-TRP scenarios, while the second TRP is a TRP used only for uplink transmission in asymmetric downlink single TRP and uplink multi-TRP scenarios. Since the path loss offset value can be used to determine the path loss estimate of the second TRP, each path loss offset value can correspond to at least one second TRP. Therefore, the network device can configure a second joint TCI state associated with path loss offset values ​​so that the beam indicated by the second joint TCI state for uplink and / or downlink transmission can be used for the second TRP corresponding to its associated path loss offset value. Typically, the downlink path loss estimate of the first TRP differs from the path loss estimate of the second TRP; that is, the path loss offset value is usually not zero. Therefore, in the embodiments of this disclosure, when configuring the second joint TCI state, the network device can associate a non-zero path loss offset value with the second joint TCI state used for the second TRP. For the second joint TCI state used for the first TRP, a path loss offset value may not be associated, or the associated path loss offset value may be zero. This allows the terminal to determine the second joint TCI state with an associated path loss offset value of zero or no associated path loss offset value as the first joint TCI state for downlink transmission, thereby adapting to asymmetric downlink single TRP and uplink multi-TRP scenarios and improving communication efficiency.

[0172] In some embodiments, the first joint TCI state is determined in at least one of the following ways: a second joint TCI state with an associated path loss offset value of zero is determined as the first joint TCI state; a second joint TCI state without an associated path loss offset value is determined as the first joint TCI state. The second joint TCI state is configured by the network device.

[0173] Optionally, the second joint TCI state with an associated path loss offset value of zero can be determined as the first joint TCI state. Specifically, in the network device's configuration of second joint TCI states, each second joint TCI state can be associated with a path loss offset value; in this case, the terminal determines the second joint TCI state with an associated path loss offset value of zero as the first joint TCI state. Alternatively, in the network's configuration of second joint TCI states, some second joint TCI states are associated with path loss offset values, while others are not. The terminal can also determine the second joint TCI state with a path loss offset value of zero from the second joint TCI states associated with path loss offset values ​​as the first joint TCI state.

[0174] Optionally, a second joint TCI state without associated path loss offset values ​​can be designated as the first joint TCI state. For example, in the second joint TCI states configured by the network device, some second joint TCI states are associated with path loss offset values, while others are not. The terminal can designate the second joint TCI state without associated path loss offset values ​​as the first joint TCI state.

[0175] It is understandable that in the embodiment where the terminal determines the first joint TCI state based on the path loss offset value, the terminal may know that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. For example, the terminal receives first information sent by the network device, thereby determining that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario, and determines the second joint TCI state with an associated path loss offset value of zero as the first joint TCI state, or determines the second joint TCI state without an associated path loss offset value as the first joint TCI state. Alternatively, the terminal may, without knowing that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario, default to determining the second joint TCI state with an associated path loss offset value of zero as the first joint TCI state, or determine the second joint TCI state without an associated path loss offset value as the first joint TCI state.

[0176] In some embodiments, the first joint TCI state is determined as follows: the second joint TCI state configured by the network device, wherein the newly added bit has a preset bit value, is determined as the first joint TCI state. For example, a new bit can be added to the second joint TCI state to indicate whether it is the first joint TCI state. For example, one bit can be added. If the value of the added bit in the second joint TCI state is 1, it indicates that the second joint TCI state is the first joint TCI state. That is, the preset bit value is 1. If the value of the added bit in the second joint TCI state is 0, it indicates that the second joint TCI state is not the first joint TCI state. Of course, the number of bits and the meaning indicated by the bit values ​​in the above examples are only exemplary. For example, multiple bits can be added, or a bit value of 1 can indicate that the second joint TCI state is not the first joint TCI state, and a bit value of 0 can indicate that the second joint TCI state is the first joint TCI state. This disclosure does not limit this.

[0177] In some embodiments, the names of the first information and the second information are not limited, and may be, for example, "instruction information" or "configuration information".

[0178] In step S2103, terminal 101 receives the channel and / or signal sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0179] In some embodiments, network device 102 transmits channels and / or signals to the terminal based on the beam corresponding to the first joint TCI state.

[0180] In some embodiments, the first joint TCI state can be used for the transmission of all channels and signals in downlink transmission. That is, the network device transmits all channels and signals to the terminal based on the beam corresponding to the first joint TCI state. Of course, this disclosure is not limited thereto.

[0181] The communication method involved in the embodiments of this disclosure may include at least one of steps S2101 to S2103. Each of steps S2101 to S2103 can be a separate embodiment, and the embodiments can be arbitrarily combined and implemented in different orders without contradiction. For example, step S2102 can be implemented as an independent embodiment, but is not limited thereto.

[0182] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0183] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG2a.

[0184] This disclosure provides a communication method, including: a terminal determining a first joint TCI state based on first information sent by a network device. Figure 2b is a schematic diagram of an interaction of a communication method according to an embodiment of this disclosure. As shown in Figure 2b, this disclosure relates to a communication method for a communication system 100, the method including:

[0185] In step S2201, network device 102 configures the second joint TCI state to terminal 101.

[0186] The optional implementation of step S2201 can be found in the optional implementation of step S2101 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0187] In step S2202, network device 102 sends first information to terminal 101.

[0188] In some embodiments, terminal 101 receives first information sent by network device.

[0189] In some embodiments, the first information is used to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. The terminal can receive the first information to determine that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. Therefore, the terminal can determine a predefined first joint TCI state from the second joint TCI state configured by the network device.

[0190] In step S2203, terminal 101 determines the predefined first joint TCI state from the second joint TCI state.

[0191] The optional implementation of step S2203 can be found in the optional implementation of step S2102 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0192] In step S2204, terminal 101 receives the channel and / or signal sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0193] The optional implementation of step S2204 can be found in the optional implementation of step S2103 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0194] The communication method involved in the embodiments of this disclosure may include at least one of steps S2201 to S2204. Each of steps S2201 to S2204 can be a separate embodiment, and the embodiments can be arbitrarily combined and their order adjusted without contradiction. For example, step S2203 can be implemented as an independent embodiment, but is not limited thereto.

[0195] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0196] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG2b.

[0197] This disclosure provides a communication method, including: a terminal determining a first joint TCI state based on second information sent by a network device. Figure 2c is a schematic diagram of an interaction of a communication method according to an embodiment of this disclosure. As shown in Figure 2c, this disclosure relates to a communication method for a communication system 100, the method including:

[0198] In step S2301, network device 102 configures the second joint TCI state to terminal 101.

[0199] The optional implementation of step S2301 can be found in the optional implementation of step S2101 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0200] In step S2302, network device 102 sends second information to terminal 101.

[0201] In some embodiments, terminal 101 receives second information sent by network device.

[0202] In some embodiments, the second information is used to determine the first joint TCI state. For example, if the second information is RRC, then the second information can configure the first joint TCI state. As another example, if the second information is MAC CE, then the second information can activate the first joint TCI state. As yet another example, if the second information is DCI, then the second information can indicate the first joint TCI state.

[0203] The optional implementation of step S2302 can be found in the optional implementation of step S2102 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0204] In step S2303, terminal 101 determines the first joint TCI state based on the second information.

[0205] The optional implementation of step S2303 can be found in the optional implementation of step S2102 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0206] In step S2304, terminal 101 receives the channel and / or signal sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0207] The optional implementation of step S2304 can be found in the optional implementation of step S2103 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0208] The communication method involved in the embodiments of this disclosure may include at least one of steps S2301 to S2304. Each of steps S2301 to S2304 can be a separate embodiment, and the embodiments can be arbitrarily combined and their order adjusted without contradiction. For example, step S2303 can be implemented as an independent embodiment, but is not limited thereto.

[0209] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0210] In some embodiments, other optional implementations may be described before or after the specification corresponding to FIG2c.

[0211] This disclosure provides a communication method, including: a terminal can determine a first joint TCI state based on a path loss offset value associated with a second joint TCI state. Figure 2d is a schematic diagram of an interaction of a communication method according to an embodiment of this disclosure. As shown in Figure 2d, this disclosure relates to a communication method for a communication system 100, the method including:

[0212] In step S2401, network device 102 configures the second joint TCI state to terminal 101.

[0213] The optional implementation of step S2401 can be found in the optional implementation of step S2101 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0214] In step S2402, terminal 101 determines the second joint TCI state with an associated path loss offset value of zero or the second joint TCI state without an associated path loss offset value as the first joint TCI state.

[0215] The optional implementation of step S2402 can be found in the optional implementation of step S2102 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0216] In step S2403, terminal 101 receives the channel and / or signal sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0217] The optional implementation of step S2403 can be found in the optional implementation of step S2103 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0218] The communication method involved in the embodiments of this disclosure may include at least one of steps S2401 to S2403. Each of steps S2401 to S2403 can be a separate embodiment, and the embodiments can be arbitrarily combined and their order adjusted without contradiction. For example, step S2402 can be implemented as an independent embodiment, but is not limited thereto.

[0219] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0220] In some embodiments, other alternative implementations may be described before or after the specification corresponding to Figure 2d.

[0221] This disclosure provides a communication method, including: a terminal can determine a first joint TCI state based on newly added bits in a second joint TCI state. Figure 2e is a schematic diagram of an interaction of a communication method according to an embodiment of this disclosure. As shown in Figure 2e, this disclosure relates to a communication method for a communication system 100, the method including:

[0222] In step S2501, network device 102 configures the second joint TCI state to terminal 101.

[0223] The optional implementation of step S2501 can be found in the optional implementation of step S2101 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0224] In step S2502, terminal 101 determines the second joint TCI state, which has newly added bits with preset bit values, as the first joint TCI state.

[0225] The optional implementation of step S2502 can be found in the optional implementation of step S2102 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0226] In step S2503, terminal 101 receives the channel and / or signal sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0227] The optional implementation of step S2503 can be found in the optional implementation of step S2103 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0228] The communication method involved in the embodiments of this disclosure may include at least one of steps S2501 to S2503. Each of steps S2501 to S2503 can be a separate embodiment, and the embodiments can be arbitrarily combined and implemented in different orders without contradiction. For example, step S2502 can be implemented as an independent embodiment, but is not limited thereto.

[0229] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0230] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG2e.

[0231] Figure 3a is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3a, this embodiment of the present disclosure relates to a communication method executed by terminal 101, the method including:

[0232] Step S3101: Obtain the second joint TCI state.

[0233] The optional implementation of step S3101 can be found in the optional implementation of step S2101 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0234] In some embodiments, terminal 101 receives a second joint TCI state sent by network device 102, but is not limited thereto, and may also receive a second joint TCI state sent by other entities.

[0235] In some embodiments, terminal 101 acquires the second joint TCI state as defined by the protocol.

[0236] In some embodiments, terminal 101 obtains the second joint TCI state from the upper layer(s).

[0237] In some embodiments, terminal 101 performs processing to obtain a second joint TCI state.

[0238] In some embodiments, step S3101 is omitted, and terminal 101 autonomously implements the function indicated by the second joint TCI state, or the above function is default or default.

[0239] Step S3102: Determine the first joint TCI state.

[0240] The optional implementation of step S3102 can be found in the optional implementation of step S2102 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0241] In some embodiments, the first joint TCI state is determined by the terminal from the second joint TCI state based on the first information sent by the network device.

[0242] In some embodiments, the first joint TCI state is determined based on second information sent by the network device.

[0243] In some embodiments, the first joint TCI state is determined based on the path loss offset value associated with the second joint TCI state.

[0244] In some embodiments, the first joint TCI state is determined based on the additional bits added in the second joint TCI state.

[0245] Step S3103: Based on the beam corresponding to the first joint TCI state, acquire the channel and / or signal.

[0246] The optional implementation of step S3103 can be found in the optional implementation of step S2103 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0247] In some embodiments, terminal 101 receives channels and / or signals sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0248] The communication method involved in the embodiments of this disclosure may include at least one of steps S3101 to S3103. Each of steps S3101 to S3103 can be a separate embodiment, and the embodiments can be arbitrarily combined and implemented in an adjusted order without contradiction. For example, step S3102 can be implemented as an independent embodiment, but is not limited thereto.

[0249] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0250] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG3a.

[0251] Figure 3b is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3b, this embodiment of the present disclosure relates to a communication method executed by terminal 101, the method including:

[0252] Step S3201: Obtain the second joint TCI state.

[0253] The optional implementation of step S3201 can be found in the optional implementation of step S2201 in Figure 2b, and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0254] In some embodiments, terminal 101 receives a second joint TCI state sent by network device 102, but is not limited thereto, and may also receive a second joint TCI state sent by other entities.

[0255] In some embodiments, terminal 101 acquires the second joint TCI state as defined by the protocol.

[0256] In some embodiments, terminal 101 obtains the second joint TCI state from the upper layer(s).

[0257] In some embodiments, terminal 101 performs processing to obtain a second joint TCI state.

[0258] In some embodiments, step S3201 is omitted, and terminal 101 autonomously implements the function indicated by the second joint TCI state, or the above function is default or default.

[0259] Step S3202: Obtain the first information.

[0260] The optional implementation of step S3202 can be found in the optional implementation of step S2202 in Figure 2b, and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0261] In some embodiments, terminal 101 receives first information sent by network device 102, but is not limited thereto; it may also receive first information sent by other entities.

[0262] In some embodiments, terminal 101 obtains first information as defined by the protocol.

[0263] In some embodiments, terminal 101 obtains first information from upper layer(s).

[0264] In some embodiments, the terminal 101 processes the information to obtain the first information.

[0265] In some embodiments, step S3202 is omitted, and the terminal 101 autonomously implements the function indicated by the first information, or the above function is the default or default.

[0266] Step S3203: Determine the predefined first joint TCI state from the second joint TCI state.

[0267] The optional implementation of step S3203 can be found in the optional implementation of step S2203 in Figure 2b, and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0268] Step S3204: Based on the beam corresponding to the first joint TCI state, acquire the channel and / or signal.

[0269] The optional implementation of step S3204 can be found in the optional implementation of step S2204 in Figure 2b, and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0270] In some embodiments, terminal 101 receives channels and / or signals sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0271] The communication method involved in the embodiments of this disclosure may include at least one of steps S3201 to S3204. Each of steps S3201 to S3204 can be a separate embodiment, and the embodiments can be arbitrarily combined and their order adjusted without contradiction. For example, step S3203 can be implemented as an independent embodiment, but is not limited thereto.

[0272] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0273] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG3b.

[0274] Figure 3c is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3c, this embodiment of the present disclosure relates to a communication method executed by terminal 101, the method including:

[0275] Step S3301: Obtain the second joint TCI state.

[0276] The optional implementation of step S3301 can be found in the optional implementation of step S2301 in Figure 2c, and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0277] In some embodiments, terminal 101 receives a second joint TCI state sent by network device 102, but is not limited thereto, and may also receive a second joint TCI state sent by other entities.

[0278] In some embodiments, terminal 101 acquires the second joint TCI state as defined by the protocol.

[0279] In some embodiments, terminal 101 obtains the second joint TCI state from the upper layer(s).

[0280] In some embodiments, terminal 101 performs processing to obtain a second joint TCI state.

[0281] In some embodiments, step S3301 is omitted, and terminal 101 autonomously implements the function indicated by the second joint TCI state, or the above function is default or default.

[0282] Step S3302: Obtain the second information.

[0283] The optional implementation of step S3302 can be found in the optional implementation of step S2302 in Figure 2c, and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0284] In some embodiments, terminal 101 receives second information sent by network device 102, but is not limited thereto; it may also receive second information sent by other entities.

[0285] In some embodiments, terminal 101 obtains second information as defined by the protocol.

[0286] In some embodiments, terminal 101 obtains second information from upper layer(s).

[0287] In some embodiments, the terminal 101 performs processing to obtain the second information.

[0288] In some embodiments, step S3302 is omitted, and the terminal 101 autonomously implements the function indicated by the second information, or the above function is defaulted or set to default.

[0289] Step S3303: Based on the second information, determine the first joint TCI state.

[0290] The optional implementation of step S3303 can be found in the optional implementation of step S2303 in Figure 2c, and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0291] Step S3304: Based on the beam corresponding to the first joint TCI state, acquire the channel and / or signal.

[0292] The optional implementation of step S3304 can be found in the optional implementation of step S2204 in Figure 2b, as well as other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0293] In some embodiments, terminal 101 receives channels and / or signals sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0294] The communication method involved in the embodiments of this disclosure may include at least one of steps S3301 to S3304. Each of steps S3301 to S3304 can be a separate embodiment, and the embodiments can be arbitrarily combined and their order adjusted without contradiction. For example, step S3303 can be implemented as an independent embodiment, but is not limited thereto.

[0295] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0296] In some embodiments, other optional implementations may be described before or after the specification corresponding to FIG3c.

[0297] Figure 3d is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3d, this embodiment of the present disclosure relates to a communication method executed by terminal 101, the method including:

[0298] Step S3401: Obtain the second joint TCI state.

[0299] The optional implementation of step S3401 can be found in the optional implementation of step S2401 in Figure 2d, and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0300] In some embodiments, terminal 101 receives a second joint TCI state sent by network device 102, but is not limited thereto, and may also receive a second joint TCI state sent by other entities.

[0301] In some embodiments, terminal 101 acquires the second joint TCI state as defined by the protocol.

[0302] In some embodiments, terminal 101 obtains the second joint TCI state from the upper layer(s).

[0303] In some embodiments, terminal 101 performs processing to obtain a second joint TCI state.

[0304] In some embodiments, step S3401 is omitted, and terminal 101 autonomously implements the function indicated by the second joint TCI state, or the above function is default or default.

[0305] Step S3402: Determine the second joint TCI state with an associated road loss offset value of zero or the second joint TCI state with no associated road loss offset value as the first joint TCI state.

[0306] The optional implementation of step S3402 can be found in the optional implementation of step S2402 in Figure 2d, and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0307] Step S3403: Based on the beam corresponding to the first joint TCI state, acquire the channel and / or signal.

[0308] The optional implementation of step S3403 can be found in the optional implementation of step S2403 in Figure 2d, and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0309] In some embodiments, terminal 101 receives channels and / or signals sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0310] The communication method involved in the embodiments of this disclosure may include at least one of steps S3401 to S3403. Each of steps S3401 to S3403 can be a separate embodiment, and the embodiments can be arbitrarily combined and implemented in different orders without contradiction. For example, step S3402 can be implemented as an independent embodiment, but is not limited thereto.

[0311] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0312] In some embodiments, other alternative implementations may be described before or after the specification corresponding to Figure 3d.

[0313] Figure 3e is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3e, this embodiment of the present disclosure relates to a communication method executed by terminal 101, the method including:

[0314] Step S3501: Obtain the second joint TCI state.

[0315] The optional implementation of step S3501 can be found in the optional implementation of step S2501 in Figure 2e, and other related parts in the embodiment involved in Figure 2e, which will not be repeated here.

[0316] In some embodiments, terminal 101 receives a second joint TCI state sent by network device 102, but is not limited thereto, and may also receive a second joint TCI state sent by other entities.

[0317] In some embodiments, terminal 101 acquires the second joint TCI state as defined by the protocol.

[0318] In some embodiments, terminal 101 obtains the second joint TCI state from the upper layer(s).

[0319] In some embodiments, terminal 101 performs processing to obtain a second joint TCI state.

[0320] In some embodiments, step S3501 is omitted, and terminal 101 autonomously implements the function indicated by the second joint TCI state, or the above function is default or default.

[0321] Step S3502: The second joint TCI state with newly added bits having a preset bit value is determined as the first joint TCI state.

[0322] The optional implementation of step S3502 can be found in the optional implementation of step S2502 in Figure 2e, and other related parts in the embodiment involved in Figure 2e, which will not be repeated here.

[0323] Step S3503: Based on the beam corresponding to the first joint TCI state, acquire the channel and / or signal.

[0324] The optional implementation of step S3503 can be found in the optional implementation of step S2503 in Figure 2e, and other related parts in the embodiment involved in Figure 2e, which will not be repeated here.

[0325] In some embodiments, terminal 101 receives channels and / or signals sent by network device 102 based on the beam corresponding to the first joint TCI state.

[0326] The communication method involved in the embodiments of this disclosure may include at least one of steps S3501 to S3503. Each of steps S3501 to S3503 can be a separate embodiment, and the embodiments can be arbitrarily combined and implemented in an adjusted order without contradiction. For example, step S3502 can be implemented as an independent embodiment, but is not limited thereto.

[0327] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0328] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG3e.

[0329] Figure 4a is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 4a, this embodiment of the present disclosure relates to a communication method executed by a network device 102, the method including:

[0330] Step S4101: Configure the second joint TCI state.

[0331] The optional implementation of step S4101 can be found in the optional implementation of step S2101 in Figure 2a, and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0332] In some embodiments, network device 102 configures a second joint TCI state to terminal 101, but is not limited thereto; it may also configure a second joint TCI state to other entities.

[0333] In some embodiments, the second joint TCI state is used to determine the first joint TCI state.

[0334] In some embodiments, the second joint TCI state is associated with a path loss offset value, and / or the second joint TCI state includes additional bits that indicate whether the second joint TCI state is the first joint TCI state.

[0335] Step S4102: Based on the beam corresponding to the first joint TCI state, transmit the channel and / or signal.

[0336] The optional implementation of step S4102 can be found in the optional implementation of step S2103 in Figure 2a, as well as other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0337] In some embodiments, network device 102 transmits channels and / or signals to terminal 101 based on the beam corresponding to the first joint TCI state, but is not limited thereto, and may also transmit channels and / or signals to other entities based on the beam corresponding to the first joint TCI state.

[0338] The communication method involved in the embodiments of this disclosure may include at least one of steps S4101 to S4102. Each of steps S4101 to S4102 can be a separate embodiment, and the embodiments can be arbitrarily combined and implemented in different orders without contradiction. For example, step S4102 can be implemented as an independent embodiment, but it is not limited thereto.

[0339] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0340] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG4a.

[0341] Figure 4b is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 4b, this embodiment of the present disclosure relates to a communication method executed by a network device 102, the method comprising:

[0342] Step S4201: Configure the second joint TCI state.

[0343] The optional implementation of step S4201 can be found in the optional implementation of step S2201 in Figure 2b, and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0344] In some embodiments, network device 102 configures a second joint TCI state to terminal 101, but is not limited thereto; it may also configure a second joint TCI state to other entities.

[0345] Step S4202: Send the first message.

[0346] Optional implementations of step S4202 can be found in the optional implementations of step S2202 in Figure 2b, as well as other related parts in the embodiments involved in Figure 2b, which will not be repeated here.

[0347] In some embodiments, network device 102 may send first information to terminal 101, but is not limited to this; it may also send first information to other entities.

[0348] Step S4203: Based on the beam corresponding to the first joint TCI state, transmit the channel and / or signal.

[0349] The optional implementation of step S4203 can be found in the optional implementation of step S2203 in Figure 2b, and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0350] In some embodiments, network device 102 transmits channels and / or signals to terminal 101 based on the beam corresponding to the first joint TCI state, but is not limited thereto, and may also transmit channels and / or signals to other entities based on the beam corresponding to the first joint TCI state.

[0351] The communication method involved in the embodiments of this disclosure may include at least one of steps S4201 to S4203. Each of steps S4201 to S4203 can be a separate embodiment, and the embodiments can be arbitrarily combined and implemented in an adjusted order without contradiction. For example, step S4202 can be implemented as an independent embodiment, but is not limited thereto.

[0352] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0353] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG4b.

[0354] Figure 4c is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 4c, this embodiment of the present disclosure relates to a communication method executed by a network device 102, the method including:

[0355] Step S4301: Configure the second joint TCI state.

[0356] The optional implementation of step S4301 can be found in the optional implementation of step S2301 in Figure 2c, and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0357] In some embodiments, network device 102 configures a second joint TCI state to terminal 101, but is not limited thereto; it may also configure a second joint TCI state to other entities.

[0358] Step S4302: Send the second message.

[0359] Optional implementations of step S4302 can be found in the optional implementations of step S2302 in Figure 2c, as well as other related parts in the embodiments involved in Figure 2c, which will not be repeated here.

[0360] In some embodiments, network device 102 may send second information to terminal 101, but is not limited thereto; it may also send second information to other entities.

[0361] Step S4303: Based on the beam corresponding to the first joint TCI state, transmit the channel and / or signal.

[0362] The optional implementation of step S4303 can be found in the optional implementation of step S2303 in Figure 2c, as well as other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0363] In some embodiments, network device 102 transmits channels and / or signals to terminal 101 based on the beam corresponding to the first joint TCI state, but is not limited thereto, and may also transmit channels and / or signals to other entities based on the beam corresponding to the first joint TCI state.

[0364] The communication method involved in the embodiments of this disclosure may include at least one of steps S4301 to S4303. Each of steps S4301 to S4303 can be a separate embodiment, and the embodiments can be arbitrarily combined and their order adjusted without contradiction. For example, step S4302 can be implemented as an independent embodiment, but is not limited thereto.

[0365] In some embodiments, multiple steps are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0366] In some embodiments, other optional implementations may be described before or after the specification corresponding to FIG4c.

[0367] Figure 5 is a schematic diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 5, this embodiment of the present disclosure relates to a communication method, which includes:

[0368] In step S5101, network device 102 sends first information or second information to terminal 101.

[0369] In step S5102, terminal 101 determines the first joint TCI state based on the first information or the second information.

[0370] In some embodiments, the above methods may include the methods of the embodiments related to the communication system 100, terminal 101, network device 102, etc., which will not be described again here.

[0371] This disclosure provides a communication method in which, when a terminal supports the Transmission Configuration Indicator (TCI) state mode in 3GPP Release 18 (R18) and is configured with a joint TCI state for beam indication in DL DTRP / UL MTRP, the following method is considered to distinguish which TCI state or beam is used for transmission in DL STRP.

[0372] In some embodiments, scenarios are distinguished: the RRC signaling is configured to indicate that the scenario is "asymmetric MTRP", and one of the TCI states is predefined for use in DL transmission; for example, the first one is used by default.

[0373] In some embodiments, signaling is used to configure or indicate which specific TCI state is used for DL ​​transport.

[0374] In some embodiments, RRC signaling is added for configuration and applied to all downlink channels / signals.

[0375] In some embodiments, MAC-CE signaling is used to indicate activation / deactivation of a TCI.

[0376] In some embodiments, DCI signaling is used to indicate the signal by adding 1 bit.

[0377] In some embodiments, if one of the joint TCI states has its PL_offset configured to 0dB or is not configured by default, then that TCI state is used as the TCI state corresponding to the DL TRP by default. All TCI states corresponding to the associated DL TRP either do not have their PL_offset configured or have it configured to 0dB.

[0378] In some embodiments, a 1-bit indicator configuration is added to the TCI state associated with the DL TRP to indicate that it is associated with a downlink TRP. If the configuration is 0, it indicates the TCI state that actually corresponds to the DL TRP.

[0379] In some embodiments, the downlink TCI state / beam information determined above is used for the transmission of all downlink channels / signals.

[0380] This disclosure also provides an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0381] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0382] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using 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 and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), or a Deep Learning Processing Unit (DPU).

[0383] Figure 6a is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure. As shown in Figure 6a, the terminal 6100 may include at least one of a processing module 6102 and a transceiver module 6101. The processing module 6102 is configured to determine a first joint transmission configuration indication state (JCI state), which is used for downlink transmission in asymmetric downlink single TRP and uplink multi-TRP scenarios.

[0384] In some embodiments, the terminal further includes a transceiver module 6101, configured to receive first information sent by the network device, the first information indicating that the communication scenario is an asymmetric downlink single TRP and uplink multiple TRP scenario. The processing module 6102 determines the first joint TCI state in the following manner: the terminal determines a predefined first joint TCI state from the second joint TCI states configured by the network device, the first joint TCI state being one of the second joint TCI states.

[0385] In some embodiments, the transceiver module 6101 is further configured to: receive second information sent by the network device. The processing module 6102 determines the first joint TCI state in the following manner: the terminal determines the first joint TCI state based on the second information.

[0386] In some embodiments, the second information includes at least one of the following: newly added Radio Resource Control (RRC) signaling, used to configure the first joint TCI state; Media Access Control (MAC) CE, used to activate the first joint TCI state; and Downlink Control Information (DCI), used to indicate the first joint TCI state.

[0387] In some embodiments, the second information includes MAC CE, and the transceiver module 6101 is further configured to: receive third information sent by the network device, the third information being used to deactivate the first joint TCI state.

[0388] In some embodiments, the processing module 6102 determines the first joint TCI state using at least one of the following methods: determining a second joint TCI state with an associated path loss offset value of zero as the first joint TCI state; or determining a second joint TCI state without an associated path loss offset value as the first joint TCI state. Wherein, the second joint TCI state is configured by the network device, and the path loss offset value is used together with the downlink path loss estimate of the first TRP to determine the path loss estimate of the second TRP. The first TRP is a TRP used for uplink and / or downlink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios, and the second TRP is a TRP used only for uplink transmission in asymmetric downlink single TRP and uplink multi TRP scenarios.

[0389] In some embodiments, the processing module 6102 determines the first joint TCI state in the following manner: the second joint TCI state configured by the network device, wherein the newly added bit is a preset bit value, is determined as the first joint TCI state.

[0390] In some embodiments, the first joint TCI state is used for the transmission of all channels and signals in downlink transmission.

[0391] Figure 6b is a schematic diagram of a network device according to an embodiment of the present disclosure. As shown in Figure 6b, the network device 6200 may include at least one of a transceiver module 6201 and a processing module 6202. The transceiver module 6201 is used to send first information or second information to a terminal. The first information is used to indicate that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. The second information is used to determine a first joint TCI state. The first joint TCI state is used for downlink transmission in the asymmetric downlink single TRP and uplink multi-TRP scenarios.

[0392] In some embodiments, the second information includes at least one of the following: newly added Radio Resource Control (RRC) signaling, used to configure the first joint TCI state; Media Access Control (MAC) CE, used to activate the first joint TCI state; and Downlink Control Information (DCI), used to indicate the first joint TCI state.

[0393] In some embodiments, the second information includes MAC CE, and the transceiver module 6201 is further configured to: send third information from the network device to the terminal, the third information being used to deactivate the first joint TCI state.

[0394] In some embodiments, the transceiver module 6201 is further configured to configure at least one second joint TCI state to the terminal, the second joint TCI state being used to determine the first joint TCI state; wherein the second joint TCI state is associated with a path loss offset value, and / or, the second joint TCI state includes newly added bits, the newly added bits being used to indicate whether the second joint TCI state is the first joint TCI state.

[0395] Figure 7a is a schematic diagram of a communication device according to an embodiment of this disclosure. The communication device 7100 can be a network device, a terminal, or a chip, chip system, or processor that supports the network device in implementing any of the above methods; alternatively, the network device can be an access network device, a core network device, etc. Optionally, the terminal can be a user equipment, etc. The communication device 7100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0396] As shown in Figure 7a, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication device, execute programs, and process program data. The communication device 7100 is used to execute any of the above methods. Optionally, the communication device can be a base station, a baseband chip, a terminal device, a terminal device chip, a DU (Distributed Unit), or a CU (Computer Integrated Circuit), etc.

[0397] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may also be located outside the communication device 7100.

[0398] 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 transceivers 7103 perform communication steps S2101 such as sending and / or receiving in the above method, and the processor 7101 performs other steps.

[0399] In some embodiments, a transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, etc., may be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., may be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., may be used interchangeably.

[0400] 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 can be used to receive signals from the memory 7102 or other devices, and can be used to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 can read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0401] 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 this 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 a standalone device or a part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components 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, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0402] Figure 7b is a schematic diagram of the chip structure proposed in an embodiment of this disclosure. For cases where the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the chip 7200 shown in Figure 7b, but it is not limited thereto.

[0403] Chip 7200 includes one or more processors 7201, which are used to perform any of the above methods.

[0404] In some embodiments, chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to memory 7203, and the interface circuit 7202 can be used to receive signals from memory 7203 or other devices, and the interface circuit 7202 can be used to send signals to memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in memory 7203 and send the instructions to processor 7201.

[0405] In some embodiments, the interface circuit 7202 performs communication steps S2101 such as sending and / or receiving in the above method, and the processor 7201 performs other steps.

[0406] In some embodiments, the terms interface circuit, interface, transceiver pin, transceiver, etc., can be used interchangeably.

[0407] In some embodiments, chip 7200 further includes one or more memories 7203 for storing instructions. Optionally, all or part of the memories 7203 may be located outside of chip 7200.

[0408] This disclosure also proposes a storage medium storing instructions that, when executed on the communication device 7100, cause the communication device 7100 to perform 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 not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0409] This disclosure also provides a program product that, when executed by the communication device 7100, causes the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0410] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

Claims

1. A communication method characterized by comprising: The method comprises: The terminal determines a first joint transmission configuration indication state (joint TCI state), which is used for downlink transmission in an asymmetric downlink single transmission point (TRP) and uplink multi-TRP scenario.

2. The method of claim 1, wherein, The first joint TCI state is determined in the following manner: The terminal determines that the communication scenario is an asymmetric downlink single TRP and uplink multi-TRP scenario. The terminal determines a predefined first joint TCI state from a second joint TCI state configured by a network device, and the first joint TCI state is one of the second joint TCI state.

3. The method of claim 1, wherein, The first joint TCI state is determined in the following manner: The terminal receives second information sent by the network device. The terminal determines the first joint TCI state based on the second information.

4. The method of claim 3, wherein, The second information includes at least one of: New radio resource control (RRC) signaling for configuring the first joint TCI state; A medium access control control element (MAC CE) for activating the first joint TCI state; Downlink control information (DCI) for indicating the first joint TCI state.

5. The method of claim 4, wherein, The second information includes a MAC CE, and the method further comprises: The terminal receives third information sent by the network device, and the third information is used to deactivate the first joint TCI state.

6. The method of claim 1, wherein, The first joint TCI state is determined in at least one of the following manners: A second joint TCI state with an associated path loss offset value of zero is determined as the first joint TCI state; A second joint TCI state without an associated path loss offset value is determined as the first joint TCI state; The second joint TCI state is configured by the network device, and the path loss offset value is used together with downlink path loss estimation of a first TRP to determine path loss estimation of a second TRP, the first TRP is a TRP used for uplink transmission and / or downlink transmission in an asymmetric downlink single TRP and uplink multi-TRP scenario, and the second TRP is a TRP used only for uplink transmission in the asymmetric downlink single TRP and uplink multi-TRP scenario.

7. The method of claim 1, wherein The first joint TCI state is determined in the following manner: A second joint TCI state with newly added bits of a preset bit value in the second joint TCI state configured by the network device is determined as the first joint TCI state.

8. The method according to any one of claims 1 to 7, characterized in that, The first joint TCI state is used for transmission of all channels and signals for downlink transmission.

9. A communication method characterized by comprising: The method comprises: The network device sends first information or second information to the terminal; The first information is used to indicate that the communication scenario is an asymmetric downlink single-TRP and uplink multi-TRP scenario. The second information is used to determine the first joint TCI state. The first joint TCI state is used for downlink transmission in the asymmetric downlink single-TRP and uplink multi-TRP scenario.

10. The method of claim 9, wherein, The second information includes at least one of the following: New radio resource control (RRC) signaling used to configure the first joint TCI state; A medium access control (MAC) control element (CE) used to activate the first joint TCI state; Downlink control information (DCI) used to indicate the first joint TCI state.

11. The method of claim 10, wherein, The second information includes a MAC CE, and the method further includes: The network device sends third information to the terminal, and the third information is used to deactivate the first joint TCI state.

12. The method according to any one of claims 9-11, characterized in that, The method further includes: The network device configures at least one second joint TCI state for the terminal, and the second joint TCI state is used to determine the first joint TCI state. The second joint TCI state is associated with a path loss offset value, and / or the second joint TCI state includes a new bit, and the new bit is used to indicate whether the second joint TCI state is the first joint TCI state.

13. A communication method characterized by comprising: The method includes: A network device sends first information or second information to a terminal; The terminal determines a first joint transmission configuration indication (TCI) state based on the first information or the second information; The first information is used to indicate that the communication scenario is an asymmetric downlink single-TRP and uplink multi-TRP scenario; and the second information is used to determine the first joint TCI state. The first joint TCI state is used for downlink transmission in the asymmetric downlink single-TRP and uplink multi-TRP scenario.

14. A terminal, characterized by It includes: A processing module is configured to determine a first joint transmission configuration indication (TCI) state, and the first joint TCI state is used for downlink transmission in an asymmetric downlink single-TRP and uplink multi-TRP scenario.

15. A network device, comprising: It includes: A transceiver module is configured to send first information or second information from a network device to a terminal; The first information is used to indicate that the communication scenario is an asymmetric downlink single-TRP and uplink multi-TRP scenario; and the second information is used to determine the first joint TCI state. The first joint TCI state is used for downlink transmission in the asymmetric downlink single-TRP and uplink multi-TRP scenario.

16. A terminal, characterized by It includes: One or more processors; The processor is configured to perform the communication method of any one of claims 1-8.

17. A network device, comprising: It includes: One or more processors; The processor is configured to perform the communication method of any one of claims 9-12.

18. A communication system, characterized by It includes: A terminal and a network device, wherein the terminal is configured to implement the communication method of any one of claims 1-8, and the network device is configured to implement the communication method of any one of claims 9-12.

19. A storage medium, characterized by Comprising: A storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the communication method of any one of claims 1-8 or 9-12.

20. A program product, characterized by Comprising: A computer program that, when executed by a communication device, causes the communication device to perform the communication method of any one of claims 1-8 or 9-12.

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