CN116170889B

CN116170889B - Communication method, device, terminal, communication equipment and readable storage medium

Info

Publication number: CN116170889B
Application number: CN202310187581.3A
Authority: CN
Inventors: 曾裕; 于江; 熊杰; 景小荣
Original assignee: Shanghai Xingsi Semiconductor Co ltd
Current assignee: Shanghai Xingsi Semiconductor Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-11-14
Anticipated expiration: 2043-02-28
Also published as: CN116170889A

Abstract

The present disclosure provides a communication method, apparatus, terminal, communication device, and readable storage medium, where the communication method is applied to a terminal, the method includes: under the condition that Downlink Control Information (DCI) is received, acquiring a first code point of a first indication domain in the DCI, wherein the first indication domain is an indication domain for indicating a transmission mode of the terminal; determining a first target transmission mode corresponding to the first code point based on a first mapping relation data set, wherein the first mapping relation data set comprises mapping relations between at least two code points and transmission modes, the at least two code points comprise the first code point, and the first target transmission mode is used for indicating at least one of the following transmission modes between the terminal and a network side: an uplink transmission mode and a downlink transmission mode, wherein the network side comprises a plurality of network side devices; and communicating with the network side based on the first target transmission mode. The communication method and the communication device can improve the communication effect between the network side and the terminal.

Description

Communication method, device, terminal, communication equipment and readable storage medium

Technical Field

The disclosure relates to the technical field of communication, and in particular relates to a communication method, a device, a terminal, a communication device and a readable storage medium.

Background

In the related art, in the process that a terminal communicates with a plurality of Transmission-Reception points (TRPs) at the same time, if the number of Transmission configuration indicators (Transmission Configuration Indicator, TCI) is still used to determine whether Uplink (UL) and Downlink (DL) use a single TRP or a multiple TRP Transmission mode, UL and DL may not be implemented to operate in different Transmission modes. In the related art, transmission of the multi-TRP scene is severely dependent on the number of indicated TCI states or spatial relationships, i.e., the number of indicated TCI states and spatial relationships need to be utilized to determine the operation modes of UL and DL, and UL and DL may operate in different transmission modes. For example, UL adopts single TRP mode and DL adopts multi TRP mode, which means that the UL and DL of UE should not be forced to operate in single TRP mode or multi TRP mode at the same time when the unified TCI frame is extended to support multi TRP scenario. Furthermore, if both TRPs are configured in joint TCI mode, then UL and DL can only operate in the same operating mode at the same time. If both TRPs are configured as separate (separation) TCI modes, different numbers of TCI states may be indicated for the UL and DL, respectively. If one TRP is configured in the joint TCI mode and the other TRP is configured in the separate TCI mode, the number of TCI states of UL and DL of the TRP configured in the separate TCI mode may be different, while the number of UL and DL TCI states of the TRP configured in the joint TCI mode is always the same, which limits flexible transmission of the UE because the UE can select only uplink transmission and downlink reception, or not uplink transmission and downlink reception, cannot select only uplink transmission and not downlink reception, or only downlink reception and not uplink transmission for the TRP configured in the joint TCI mode. It can be seen that the existing transmission method has the problem of poor transmission effect.

Disclosure of Invention

An object of an embodiment of the present disclosure is to provide a communication method, apparatus, terminal, communication device, and readable storage medium, for solving the problem that the existing transmission method has a poor transmission effect.

To solve the above problems, the present disclosure is implemented as follows:

in a first aspect, an embodiment of the present disclosure provides a communication method, which is applied to a terminal, including:

under the condition that Downlink Control Information (DCI) is received, acquiring a first code point of a first indication domain in the DCI, wherein the first indication domain is an indication domain for indicating a transmission mode of the terminal;

determining a first target transmission mode corresponding to the first code point based on a first mapping relation data set, wherein the first mapping relation data set comprises mapping relations between at least two code points and transmission modes, the at least two code points comprise the first code point, and the first target transmission mode is used for indicating at least one of the following transmission modes between the terminal and a network side: the network side comprises a plurality of network side devices;

and communicating with the network side based on the first target transmission mode.

In a second aspect, an embodiment of the present disclosure provides a communication method, applied to a network side device, including:

and sending DCI to a terminal, wherein a first indication domain in the DCI comprises a first code point, the first indication domain is used for indicating the transmission mode of the terminal, the first code point is used for indicating the transmission mode of the terminal, and the transmission modes corresponding to different first code points are different.

In a third aspect, an embodiment of the present disclosure provides a terminal, including:

an acquisition module, configured to acquire a first code point of a first indication domain in downlink control information DCI sent by a network side, where the first indication domain is an indication domain for indicating a transmission mode of the terminal;

a determining module, configured to determine a first target transmission mode corresponding to the first code point based on a first mapping relationship data set, where the first mapping relationship data set includes a mapping relationship between at least two code points and a transmission mode, the at least two code points include the first code point, and the first target transmission mode is used to indicate at least one of the following transmission modes between the terminal and the network side: an uplink transmission mode and a downlink transmission mode;

And the communication module is used for communicating with the network side based on the first target transmission mode.

In a fourth aspect, an embodiment of the present disclosure provides a network side device, including:

a sending module, configured to send DCI to a terminal, where a first indication field in the DCI includes a first code point, where the first indication field is an indication field for indicating a transmission mode of the terminal, the first code point is used to indicate the transmission mode of the terminal, and transmission modes corresponding to different first code points are different.

In a fifth aspect, embodiments of the present disclosure further provide a communication device, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; the processor is configured to read a program in the memory to implement the steps in the method according to the foregoing first aspect; or, the steps of the method as described in the foregoing second aspect are implemented.

In a sixth aspect, embodiments of the present disclosure further provide a readable storage medium storing a program, which when executed by a processor, implements the steps of the method according to the first aspect, or implements the steps of the method according to the second aspect.

In the embodiment of the present disclosure, since the first indication field in the DCI sent by the network side may indicate the transmission mode of the terminal, the first indication field may be used to indicate the uplink transmission mode and the downlink transmission mode of the terminal respectively. In this way, the determination of the transmission mode of the terminal does not need to depend on the number of TCI states corresponding to the TCI code points, so that the indication effect of the transmission mode of the terminal is improved, and the communication effect between the network side and the terminal is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the description of the embodiments of the present disclosure will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of a network system to which embodiments of the present disclosure are applicable;

FIG. 2 is one of the flow diagrams of a communication method provided in an embodiment of the present disclosure;

FIG. 3 is a second flow chart of a communication method according to an embodiment of the disclosure;

FIG. 4 is a third flow chart of a communication method according to an embodiment of the disclosure;

FIG. 5 is a schematic diagram of the structure of combination A) in an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of the structure of combination B) in an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of the structure of combination C) in an embodiment of the present disclosure;

FIG. 8 is a flow diagram of mapping data set updating in an embodiment of the present disclosure;

FIG. 9 is a fourth flow chart of a communication method according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a network side device according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

The terms "first," "second," and the like in embodiments of the present disclosure are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in this disclosure means at least one of the connected objects, e.g., a and/or B and/or C, is meant to encompass the 7 cases of a alone, B alone, C alone, and both a and B, both B and C, both a and C, and both A, B and C.

Referring to fig. 1, fig. 1 is a block diagram of a network system to which an embodiment of the present disclosure is applicable, and as shown in fig. 1, includes a data transmitting apparatus 11 and a data receiving apparatus 12.

Wherein communication is possible between the data transmitting device 11 and the data receiving device 12. The data transmitting apparatus 11 transmits Ciphertext information (ciphertest Block) to the data receiving apparatus 12.

In practical applications, the data transmitting device 11 may be a terminal (may also be referred to as a User Equipment (UE)), and the data receiving device 12 may be a network-side device; alternatively, the data transmitting apparatus 11 may be a network-side apparatus, and the data receiving apparatus 12 may be a terminal; alternatively, the data transmitting apparatus 11 may be a terminal, and the data receiving apparatus 12 may be a terminal, but is not limited thereto.

The terminal may be a cell phone, tablet (Tablet Personal Computer), laptop (Laptop Computer), personal digital assistant (Personal Digital Assistant, PDA), mobile internet appliance (Mobile Internet Device, MID), wearable Device, in-vehicle Device, or the like. The network side devices may be base stations, access and mobility management functions (Access and Mobility Management Function, AMF), relays, access points, or other network elements, etc.

The following describes a communication method provided by the embodiments of the present disclosure.

Referring to fig. 2, fig. 2 is a flow chart of a communication method according to an embodiment of the disclosure, where the communication method includes the following steps:

step 210, under the condition that downlink control information (Downlink Control Information, DCI) is received, acquiring a first code point of a first indication field in the DCI, wherein the first indication field is an indication field for indicating a transmission mode of the terminal;

Step 220, determining a first target transmission mode corresponding to the first code point based on a first mapping relation data set, where the first mapping relation data set includes a mapping relation between at least two code points and a transmission mode, the at least two code points include the first code point, and the first target transmission mode is used to indicate at least one of the following transmission modes between the terminal and the network side: the network side comprises a plurality of network side devices;

step 230, communicating with the network side based on the first target transmission mode.

The network side may include various types of network side devices in the related art, and the network side devices are Transmission-Reception points (TRPs), for example, the TRPs may be base stations that communicate with the terminal.

The method provided in one embodiment of the present disclosure may be applied to a scenario in which a terminal communicates with multiple TRPs, assuming that there are M TRPs and 1 terminal (UE), where M is an integer greater than or equal to 2.

Each TRP may be configured as one of two transmission configuration indication (Transmission Configuration Indicator, TCI) modes, then for M TRP there may be three classes of combinations of TCI modes, 2 altogether ^M A kind of module is assembled in the module and the module is assembled in the module.

Combination a): as shown in fig. 5, all TRP is configured in the joint TCI mode;

combination B): as shown in fig. 6, all TRP is configured as an individual TCI mode

Combination C): as shown in fig. 7, N TRP is configured as a joint TCI mode, and the remaining K TRP is configured as an individual TCI mode, where n=1, 2, …, M-1, k=m-N.

There are 4 cases for UE transmission of each TRP:

case 1) Uplink (UL) only transmission

Case 2) Downlink (DL) reception only

Case 3) both UL transmission and DL reception

Case 4) neither UL nor DL reception is performed

Taking a 2TRP scenario as an example, the transmission modes of the UE are the following 4 classes, and 9 kinds of transmission modes are used:

first category: UL and DL both transmit/receive multi-TRP

Mode 1) both UL and DL transmit/receive TRP1 and TRP2

The second category: UL and DL both transmit/receive single TRP

Mode 2) both UL and DL transmit/receive TRP1

Mode 3) both UL and DL transmit/receive TRP2

Mode 4) UL transmission of TRP1 and DL reception of TRP2

Mode 5) UL transmission of TRP2 and DL reception of TRP1

Third category: UL transmitting single TRP and DL receiving multiple TRP

Mode 6) UL transmission of TRP1, DL reception of TRP1 and TRP2

Mode 7) UL transmission of TRP2, DL reception of TRP1 and TRP2

Fourth category: UL transmitting multiple TRP and DL receiving single TRP

Mode 8) UL transmitting TRP1 and TRP2, DL receiving TRP1

Mode 9) UL transmitting TRP1 and TRP2, DL receiving TRP2

After determining the possible transmission modes of the terminal, a first mapping relation data set for determining the corresponding relation between the code points and the transmission modes can be constructed in advance, wherein different code points in the first mapping relation data set correspond to different transmission modes. And the first mapping relation data set may be transmitted to the terminal in advance, so that when the terminal receives the DCI, the terminal may first analyze a first code point of a first indication field in the DCI, then determine a first target transmission mode corresponding to the first code point according to the first mapping relation data set, and then communicate with the network side based on the first target transmission mode.

In this embodiment, since the first indication field in the DCI sent by the network side may indicate the transmission mode of the terminal, the first indication field may be used to indicate the uplink transmission mode and/or the downlink transmission mode of the terminal. In this way, the determination of the transmission mode of the terminal does not need to depend on the number of TCI states corresponding to the TCI code points, so that the indication effect of the transmission mode of the terminal is improved, and the communication effect between the network side and the terminal is improved.

Optionally, before the step of acquiring the first code point of the first indication field in the DCI if the downlink control information DCI is received, the method further includes:

receiving first Radio Resource Control (RRC) information sent by the network side, wherein the first RRC information comprises a first parameter used for indicating the length of the first indication domain;

the obtaining the first code point of the first indication field in the DCI includes:

acquiring a first code point of a first indication domain in the DCI based on the length indicated by the first parameter;

and/or the number of the groups of groups,

and receiving a first media access control layer control element (MAC CE) sent by the network side, wherein the first MAC CE comprises a second parameter, and the second parameter comprises the first mapping relation data set.

In one embodiment of the present disclosure, a first parameter (e.g., tpi-Switch-r 18) may be newly added in a radio resource control (Radio Resource Control, RRC) information element (Information Elements, IE) control resource set to indicate the length of the newly added first indication field (e.g., TRP Pattern indicator) in the DCI. If tpi-Switch-r18 is not configured, the first indication field is 0 bits in length, otherwise the first indication field is 1 bit to (2M-1) bits in length. While TRP Pattern indicator indicates that the specific mapping relationship between the code points of the domain and the transmission mode is determined by the MAC CE, a second parameter (e.g., UE-specific TRP Pattern) is added to the MAC CE to indicate the mapping relationship between the transmission mode and the code points of the newly added indication domain TRP Pattern indicator. Wherein the first mapping relation data set may be the second parameter. The first mapping data set includes data contents as in table 1 below:

Table 1 association table of code points and transmission modes of new indication field TRP Pattern indicator

When the length of the code point is 0 bit, the transmission mode of the target (i.e., the transmission mode of the last data transmission) can be kept unchanged by the corresponding terminal. Whereas when the length of the code point is 1 bit, the code point may be 0 and 1, and accordingly, the two transmission modes of mode 1) and mode 2) are corresponding, for example, when the code point is 0, it can be known from table 1 that the corresponding mode 1 is the mode 1); accordingly, when the length of the code point is 1 and the code point is 1, it can be seen from table 1 that mode 2 corresponds to this time).

Similarly, transmission modes corresponding to different code points can be preconfigured. In addition, DCI can be newly added to the remainder (2 ^M+1 -3) code points are set to reserve an indication field.

The acquiring, based on the length indicated by the first parameter, the first code point of the first indication field in the DCI may specifically refer to: and acquiring the code point with the corresponding length in a first indication domain according to the length indicated by the first parameter, and then determining the acquired code point as a first code point.

Optionally, the method further comprises:

receiving a second MAC CE sent by the network side, wherein the second MAC CE comprises a third parameter, the third parameter comprises a second mapping relation data set, and the second mapping relation data set is as follows: the network side updates the mapping relation in the first mapping relation data set to obtain a data set based on the using frequency of the terminal to each transmission mode in a preset time period, wherein in the second mapping relation data set, the length of a code point corresponding to the transmission mode with higher using frequency of the terminal is smaller, and the terminal determines the transmission mode of the terminal based on the first mapping relation data set in the preset time period;

And updating the mapping relation in the first mapping relation data set into the mapping relation in the second mapping relation data set.

Specifically, it is assumed that in actual transmission, the most used transmission mode of the UE is mode 8 in table 1 above), and the code point length of the newly added indication field TRP Pattern indicator corresponding to mode 8) is 3 bits, at this time, DCI overhead is large, and the network side may remap the association relationship between the code point of the newly added indication field TRP Pattern indicator and the transmission mode by using the newly added third parameter in the MAC CE, so as to obtain the second mapping relationship data set. The number of code point bits in the newly added indication field TRP Pattern indicator corresponding to the transmission mode to be frequently used is reduced, and the number of code point bits in the newly added indication field TRP Pattern indicator corresponding to the transmission mode to be less used is increased, so that the cost of DCI in actual transmission is reduced. For example, the association table 2 formed after the base station remaps the association relationship between the code point of the new indication field TRP Pattern indicator and the transmission mode is as follows:

table 2 association table of code points and transmission modes of newly added indication field TRP Pattern indicator after remapping

It can be appreciated that the first MAC CE and the second MAC CE are different MAC CE messages. And the first MAC CE and the second MAC CE respectively carry different mapping relation data sets.

Specifically, the network side can know the transmission mode of the terminal in the process of communicating with the terminal, so the network side can count the transmission mode of the terminal in a preset time period, and update the mapping relation in the first mapping relation data set according to the use frequency of the terminal for each transmission mode in the preset time period to obtain the second mapping relation data set. The second mapping relation data sets corresponding to different terminals may be different, that is, the network side may respectively count the frequency of use of each transmission mode by different terminals, then respectively generate second mapping relation data sets corresponding to each terminal, and transmit the generated second mapping relation data sets to the corresponding terminals in the form of a second MAC CE.

The above-mentioned preset period of time may be a period of time before the current point of time, for example, may be the previous month, the previous two months, or the like. For example, the network side may update the first mapping relation data set based on the frequency of use of each transmission mode by the terminal in the past month every month.

Referring to fig. 8, a dynamic adjustment process of the association table of the code point and the transmission mode of the indication field TRP Pattern indicator added in the DCI by the base station is specifically as follows:

step 201: the base station initializes an association table: the transmission mode is mapped to the code point of the new indication field TRP Pattern indicator and carried by the MAC CE, where the association table is the first mapping relation data set. The specific mapping situation may be determined by the base station according to the statistics of the transmission mode used by the UE in the area, or the base station may map according to a default association table (e.g. table 1). According to the mapping relationship determined by the statistical data, the transmission mode that is actually and frequently adopted by the UE in the area can be mapped to the code point with fewer bits in the newly added indication field TRP Pattern indicator, so that DCI overhead before updating the association table is reduced.

Step 202: the base station judges whether the association table of the UE needs to be updated. If the UE frequently adopts a certain mode (for example, the number of times is greater than the preset value in the preset time), but the number of code point bits corresponding to the newly added indication field TRP Pattern indicator is relatively long, the association table is updated, and step 203 is performed. If the association table of the UE does not need to be updated, step 204 is performed.

Step 203: the base station performs adjustment and update on the configured association table (namely, generates a second mapping relation data set): the transmission mode is remapped to the code point of the newly added indication field TRP Pattern indicator, carried by the MAC CE.

Step 204: and carrying out the transmission.

Step 205: after the present transmission is completed, preparation is made for the next transmission, and step 202 is repeatedly executed.

In this embodiment, the network side can reduce the DCI overhead by remapping the association between the code point of the newly added indication field TRP Pattern indicator and the transmission mode according to the frequency of use.

Optionally, the terminal and the plurality of network side devices communicate based on single DCI, and the first target transmission mode is used to indicate a transmission mode between the terminal and the plurality of network side devices.

Wherein, the network side device may be the TRP described above. The network side comprises a plurality of network side devices, and the scene indicated by the terminal and the network side devices for communication based on single DCI is: the terminal is based on the scenario of single DCI and multi-TRP communication. In the related art, the terminal has the following drawbacks in addition to the drawbacks described in the background art in the scenario based on single DCI and multi-TRP communication:

1) When the number of TCI states corresponding to the TCI code point does not match the current transmission mode, the UE needs to know whether to switch the transmission mode or keep the transmission mode unchanged and update only the TCI state. For example, the TCI code point contains only TCI states corresponding to one TRP, and when both UL and DL transmit/receive multiple TRP, there are two existing schemes: the first scheme is to switch the transmission mode from a multi-TRP to a single TRP and apply the TCI state corresponding to the TCI code point to the transmission with the corresponding TRP; the second scheme is to maintain the multi-TRP mode and update only the TCI state of the corresponding TRP. TRP needs to explicitly tell the UE which selection to employ.

2) The existing TCI code point resources may not meet the requirement of the multi-TRP scenario under the unified TCI framework. In the 3gpp RAN1 109-e conference, increasing the maximum number of TCI states activated by a media access Control (Medium Access Control, MAC) Control Element (CE), increasing the maximum number of bits of the TCI indication field, has been considered to accommodate more TCI state combinations.

Based on the above drawbacks, please refer to fig. 3, which is a schematic flow chart of a communication method according to an embodiment of the disclosure, the communication method includes the following steps:

Step 301: the UE receives an RRC message from TRP 2, which contains an RRC higher layer parameter tpi-Switch-r18 for indicating the length of the newly added indication field TRP Pattern indicator in the DCI. If the received MAC CE does not contain the mapping relationship between the code point of the newly added indication field TRP Pattern indicator in the DCI and the transmission mode, the mapping relationship between the code point of the newly added indication field TRP Pattern indicator in the DCI included in the previously received MAC CE and the transmission mode is used.

Step 302: the UE determines the length of the newly added indication field TRP Pattern indicator in the DCI according to the RRC higher layer parameter tpi-Switch-r 18.

Step 303: the UE receives a physical downlink control channel (Physical Downlink Control Channel, PDCCH) from TRP 1.

Step 304: the UE determines, according to the code point of the new indication field TRP Pattern indicator of the DCI in the received PDCCH, the transmission mode indicated by the base station as follows: the UE performs UL transmission on TRP 2 and DL reception on TRP 1.

Step 305: the UE transmits a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) for TRP 2 according to the indicated transmission mode.

Step 306: the base station remaps the association between the code points of the newly added indication field TRP Pattern indicator in the DCI and the transmission mode through the MAC CE according to the actual transmission mode used by the UE, so that the number of bits of the code points of the newly added indication field corresponding to the frequently used transmission mode is small.

Step 307: the UE receives RRC message and MAC CE message transmitted by TRP1 according to the indicated transmission mode, wherein the RRC message comprises RRC higher layer parameters tpi-Switch-r18, and the MAC CE message comprises the association condition of the code point of the newly added indication field TRP Pattern indicator in the remapped DCI and the transmission mode.

Step 308: the UE determines the length of the newly added indication domain TRP Pattern indicator in the DCI according to the RRC higher layer parameter tpi-Switch-r18, and determines the association condition of the code point of the newly added indication domain TRP Pattern indicator in the remapped DCI and the transmission mode according to the content of the MAC CE.

Step 309: the UE receives a PDCCH from TRP 1.

Step 310: the UE determines, according to the code point of the new indication field TRP Pattern indicator of the DCI in the received PDCCH, the transmission mode indicated by the base station as follows: the UE performs UL transmission on TRP1 and TRP2, and DL reception on TRP 1.

Step 311: the UE transmits PUSCH for TRP2 according to the indicated transmission mode.

Step 312: the UE transmits PUSCH for TRP1 according to the indicated transmission mode.

Step 313: the UE receives an RRC message of TRP1 transmission according to the indicated transmission mode, which contains the RRC higher layer parameter tpi-Switch-r18.

In a single DCI based multi-TRP scenario, multi-TRP transmission is heavily dependent on the number of TCI states and spatial relationships, one enhancement in the extension of the unified TCI framework is to increase the number of TRPs corresponding to TCI code points, e.g. the TCI code points extend from a TCI state corresponding to one TRP to a TCI state corresponding to two TRPs. Considering the dependence of multi-TRP transmission on TCI state, considering the association of TCI code points and TCI state, the UE needs to consider the situation that only transmits single TRP, so although one TCI code point corresponds to the TCI state of two TRPs, the association situation that one TRP corresponds to the TCI state being null needs to be set for representing that only single TRP is transmitted. Because the unified TCI framework extends to multiple TRP, where a TCI code point corresponds to a combination of multiple TRP TCI states, which would result in that existing TCI code point resources cannot meet the requirement, it may happen that multiple TRP is to be used for transmission, but that the TCI state of a certain TRP to be used is only in some mapping case where the TCI state of a TCI code point corresponds to another TRP is empty, so if the code point contains only TCI states corresponding to one TRP, such as joint TCI state for TRP1 or DL/UL individual TCI state pair for TRP1, the base station may wish the UE to perform the following operations:

One) switching of transmission mode from multi-TRP mode to single TRP mode

Two) maintain the multi-TRP mode and update the TCI state of TRP 1

At this time, the contradiction between the transmission mode switching and the update of the TCI state only while keeping the transmission mode unchanged will occur, the method of the embodiment shown in fig. 3 is used to indicate the operation mode, and the transmission mode of the UE is indicated by the newly added indication field in the DCI instead of being determined by the number of TCI states, so that the TCI state corresponding to the TCI code point is only used for the update of the TCI state and is not used for determining the transmission mode, thereby solving the contradiction between the transmission mode switching and the update of the TCI state only while keeping the transmission mode unchanged.

In this embodiment, the embodiment can solve the problem that UL and DL transmissions may not be able to operate in different transmission modes in a multi-TRP scenario based on a single DCI, and the transmission mode is indicated by using an additional indication field TRP Pattern indicator in the DCI. Meanwhile, the embodiment can solve the contradiction between switching the transmission mode and keeping the transmission mode unchanged and updating only the TCI state. When the TCI state corresponding to the TCI code point is not matched with the current transmission mode, the transmission mode is determined by using a general method, and the TCI state corresponding to the TCI code point is only used for updating the TCI state. In addition, in this embodiment, the base station may dynamically adjust the mapping situation between the newly added indication field and the transmission mode in the DCI according to the actual usage situation of the UE, so that the frequently used transmission mode corresponds to the code point with fewer bits in the newly added indication field, and the less used transmission mode corresponds to the code point with more bits in the newly added indication field, thereby reducing the cost of the DCI in actual transmission.

Optionally, the DCI includes a transmission configuration indication TCI code point, the terminal communicates with the plurality of network side devices based on a single DCI, the plurality of network side devices including at least one first network side device configured to be in a joint TCI mode and at least one second network side device configured to be in a separate TCI mode, the first target transmission mode being used to indicate a transmission mode between the terminal and the first network side device, the method further comprising:

acquiring a TCI code point in the DCI;

and determining a second target transmission mode corresponding to the TCI code points based on a third mapping relation data set, wherein the third mapping relation data set comprises mapping relations between at least two TCI code points and transmission modes, the second target transmission mode is used for indicating the transmission mode between the terminal and the second network side equipment, and the first mapping relation data set is used for indicating the transmission mode between the terminal and the network side equipment configured to be combined with the TCI mode.

The first network side device may be the TRP described in the above embodiment, and the second network side device may be other TRP except for the first network side device in the above embodiment. The first network side device is configured to be in a joint TCI mode, and the second network side device is configured to be in a scenario indicated by an individual TCI mode: the scene to which the present disclosure is directed is the scene of the combination C) in the above-described embodiment.

For combination C), taking 2TRP as an example, the TCI state combinations corresponding to partial TCI code points may be combined. For TRP1 configured as a combined TCI mode and TRP2 of a separate TCI mode, the combinations of TCI states that may exist are shown in table 3 below:

TABLE 3 TCI State combinations where 2TRP may be present in combination C)

TRP1	TRP2	TRP2
			joint TCI	/	/
/	DL TCI	UL TCI
			joint TCI	DL TCI	/
joint TCI	/	UL TCI
			joint TCI	DL TCI	UL TCI

In table 3, the first row represents the names of TRP, and the second to sixth rows represent different TCI states. It can be seen that, in table 3, for the combination C), there are 5 different TCI states in the 2TRP scenarios, and therefore, 5 different transmission modes corresponding to the 5 different TCI states may be preset, thereby obtaining the third mapping relation data set. In this way, in the case that the DCI is received later, the corresponding first target transmission mode may be determined based on the TCI state in the DCI, and then data transmission may be performed based on the first target transmission mode.

This embodiment is a further improvement over the embodiment shown in fig. 3. In the embodiment corresponding to fig. 3, the transmission mode of the terminal is determined by adopting the mode of adding the indication field for each of the combinations a), B) and C). However, the technical problems described in the background art only exist due to the above-described scene of the combination C). Therefore, in the embodiment of the present disclosure, the transmission mode of the terminal is determined only for the above-mentioned scenario of the combination C) by adding the indication field, and for the above-mentioned scenarios of the combination a) and the combination B), the transmission mode of the terminal may be determined along the method of adopting the TCI state in the related art.

Specifically, for the combination C), i.e. part of the TRP is configured as a joint TCI mode and part of the TRP is configured as a separate TCI mode, the transmission mode may be determined in combination with the method of the embodiment shown in fig. 3 and the method of the separate TCI mode indicating UL and DL operation modes, which is only applicable for the combination C). At this time, the transmission of the TRP configured in the individual TCI mode and the UE is determined by the number of TCI states corresponding to the TCI code point, and the transmission of the TRP configured in the joint TCI mode and the UE is determined by a second indication field (for example, TRP Pattern indicator) newly added to the DCI, wherein the second indication field is the first indication field in the above embodiment. The length of the second indication field is determined by a third parameter (e.g., tpi-Switch-r 18) added in RRC IE ControlResourceSet, which is the first parameter in the above embodiment. And mapping the transmission mode to the code point of the newly added second indication field in the DCI by a newly added fourth parameter (e.g. UE-specific TRP Pattern) in the MAC CE, where the fourth parameter is the second parameter in the above embodiment.

In one embodiment of the present disclosure, it is assumed that N TRPs are configured as a joint TCI mode, and the remaining K TRPs are configured as separate TCI modes, in which case the second indicator field needs and (4) are newly added in the DCI ^N +1) transmission cases (4 of ^N Because the UE has 4 transmission cases for each TRP, there is a total of 4 for the combination of all TRP transmission cases ^N Seed, 4 ^N The addition of 1 is also required because keeping the transmission mode unchanged is also a transmission case, and keeping the transmission mode unchanged also requires mapping to the code point of the newly added indication field in the DCI, so the length of the newly added indication field only needs to be configured to be 0 bits to 2N bits.

At this time, the DCI can be newly added with the remaining (2 ^2N -2) the code points are set to reserve an indication field.

In the actual transmission process, the base station can newly add a fourth parameter through the MAC CE according to the frequency of the working mode actually used by the UE, and remap the transmission mode to the code point of the DCI newly added indication domain, so that the frequently used transmission mode corresponds to the code point with fewer bits of the DCI newly added indication domain, and the less used transmission mode corresponds to the code point with more bits of the DCI newly added indication domain, thereby reducing the cost of DCI in actual transmission.

Referring to fig. 4, in an embodiment of the disclosure, taking 2TRP as an example, a communication flow between TRP and UE is described:

step 401: the UE receives an RRC message from TRP 2, which contains an RRC higher layer parameter tpi-Switch-r18 for indicating the length of the newly added indication field TRP Pattern indicator in the DCI. If the received MAC CE does not contain the mapping relationship between the code point of the newly added indication field TRP Pattern indicator in the DCI and the transmission mode, the mapping relationship between the code point of the newly added indication field TRP Pattern indicator in the DCI included in the previously received MAC CE and the transmission mode is used.

Step 402: the UE determines the length of the newly added indication field TRP Pattern indicator in the DCI according to the RRC higher layer parameter tpi-Switch-r 18.

Step 403: the UE receives a PDCCH from TRP 2.

Step 404: the UE determines, according to the code point of the newly added indication field TRP Pattern indicator of the DCI in the received PDCCH and the TCI code point, that the transmission mode is: the UE performs UL transmission on TRP1 and DL reception on TRP1 and TRP 2.

Step 405: the UE transmits PUSCH for TRP1 according to the indicated transmission mode.

Step 406: the base station remaps the association between the code points in the newly added indication field TRP Pattern indicator in the DCI and the transmission modes through the MAC CE according to the actual use situation of the transmission modes by the UE, so that the number of bits of the code points in the newly added indication field corresponding to the frequently used transmission modes (for example, the number of times is greater than a preset value in a preset time) is less.

Step 407: the UE receives RRC message and MAC CE message transmitted by TRP1 according to the indicated transmission mode, wherein the RRC message comprises RRC higher layer parameters tpi-Switch-r18, and the MAC CE message comprises the association condition of the code point of the newly added indication field TRP Pattern indicator in the remapped DCI and the transmission mode.

Step 408: the UE determines the length of the newly added indication domain TRP Pattern indicator in the DCI according to the RRC higher layer parameter tpi-Switch-r18, and determines the association condition of the code point of the newly added indication domain TRP Pattern indicator in the remapped DCI and the transmission mode according to the content of the MAC CE.

Step 409: the UE receives a PDCCH from TRP 2.

Step 410: the UE determines, according to the code point of the new indication field TRP Pattern indicator of the DCI in the received PDCCH and the TCI code point, the transmission mode indicated by the base station as follows: the UE performs UL transmission on TRP 2, and DL reception on TRP1 and TRP 2.

Step 411: the UE transmits PUSCH for TRP 2 according to the indicated transmission mode.

Step 412: the UE receives an RRC message of TRP1 transmission according to the indicated transmission mode, which contains the RRC higher layer parameter tpi-Switch-r18.

Taking 2TRP as an example, the transmission modes of the UE are four:

mode a) UE performs uplink transmission and downlink reception of TRP configured as a joint TCI mode, and uplink transmission and downlink reception of TRP configured as a separate TCI mode is determined by TCI state corresponding to TCI code point.

Mode b) the UE performs uplink transmission without downlink reception of the TRP configured as the joint TCI mode, and uplink transmission and downlink reception of the TRP configured as the separate TCI mode are determined by the TCI state corresponding to the TCI code point.

Mode c) the UE performs downlink reception of TRP configured as a joint TCI mode without uplink transmission, and uplink transmission and downlink reception of TRP configured as a separate TCI mode are determined by TCI states corresponding to TCI code points.

Mode d) the UE does not perform uplink transmission and downlink reception of the TRP configured as the joint TCI mode, and uplink transmission and downlink reception of the TRP configured as the separate TCI mode is determined by the TCI state corresponding to the TCI code point.

At this time, since the mode a) to the mode d) each of the new indication fields can determine only the transmission mode for the TRP configured as the joint TCI mode, and the uplink transmission and the downlink reception of the TRP configured as the separate TCI mode are determined by the TCI state corresponding to the TCI code point. Thus, if the combination C) corresponds to TRP1 being configured as a joint TCI mode and TRP2 being configured as an individual TCI mode, the transmission mode of TRP2 is determined according to the TCI state corresponding to the TCI code point. Therefore, in the case where only the transmission mode of TRP1 is considered, the above-mentioned 9 transmission modes can be further classified into four types of modes a) to d). Specifically, in the mode a), the uplink transmission and the downlink reception are performed for TRP1, and in the modes 1), 2), 6) and 8), the uplink transmission and the downlink reception are performed for TRP1, so that the modes 1), 2), 6) and 8) of 9 transmission modes can be performed when the mode a) corresponds to 2 TRP. Wherein, from the above, mode 1) is: both UL and DL transmit/receive TRP1 and TRP 2; mode 2) is: both UL and DL transmit/receive TRP 1; mode 6) is: UL transmits TRP1, DL receives TRP1 and TRP 2; mode 8) is: UL transmits TRP1 and TRP2, and DL receives TRP 1. In this embodiment, the transmission mode of TRP1 configured as the joint TCI mode is determined according to the new indicated domain code point, and the transmission mode of TRP2 configured as the individual TCI mode is determined according to the TCI state corresponding to the TCI code point.

Accordingly, since in the mode b), the downlink is not received for the uplink transmission of TRP1, and the mode 4) and the mode 9) of the 9 transmission modes are also the uplink transmission for TRP1, the downlink is not received, and thus the mode b) corresponds to the mode 4) and the mode 9) of the 9 transmission modes at 2 TRP). Accordingly, mode c) corresponds to mode 5) and mode 7) of 9 transmission modes at 2TRP, and mode d) corresponds to mode 3) of 9 transmission modes at 2 TRP. If TRP1 is configured as a single TCI mode, TRP2 is configured as a joint TCI mode, mode a) corresponds to mode 1) of the 9 transmission modes when 2TRP, mode 3), mode 7), mode 9), mode b) corresponds to mode 5) and mode 8) of the 9 transmission modes when 2 TRP), mode c) corresponds to mode 4) and mode 6) of the 9 transmission modes when 2TRP, and mode d) corresponds to mode 2) of the 9 transmission modes when 2 TRP). Thus, mode a) corresponds to 4 of the 9 transmission modes at 2TRP, mode b) corresponds to 2 of the 9 transmission modes at 2TRP, mode c) corresponds to 2 of the 9 transmission modes at 2TRP, and mode d) corresponds to 1 of the 9 transmission modes at 2 TRP.

It will be appreciated that in one embodiment of the present disclosure, if the transmission mode is determined to be one of the modes a) to d) according to the newly added indicated domain code point, that is, the TRP1 transmission mode is determined according to the newly added indicated domain code point, the TRP2 transmission mode may be further determined according to the TCI state corresponding to the TCI code point. For example, when determining that the transmission mode is the mode a) according to the new indicated domain code point, since the TCI state corresponding to the TCI code point may indicate the transmission mode of TRP2, the final transmission mode may be determined in the modes 1), 2), 6) and 8) according to the TCI state corresponding to the TCI code point, if the TCI state corresponding to the TCI code point indicates that the transmission mode of TRP2 is: when uplink transmission and downlink reception are performed, the finally determined transmission mode is mode 1).

The specific process of determining the transmission mode of TRP2 according to the TCI state corresponding to the TCI code point is similar to the process of determining the transmission mode according to the TCI state in the related art. For example, a correspondence between a TCI state corresponding to a TCI code point and a transmission mode may be recorded through a third mapping relation data set, so that a current TCI state may be determined according to the TCI code point in the DCI, and a transmission mode of TRP2 may be determined according to the determined TCI state by using the third mapping relation data set.

When the method only applicable to the combination C) indicates the operation mode, a possible association table 4 of the new indicated domain code point and the transmission mode is as follows:

table 4 association table of new indicated domain code points and transmission modes applicable only to the method of combining C)

If the UE uses the association case corresponding to table 4, then the indication modes a) and b) only need 1 bit in the DCI, the indication modes C) and d) only need 2 bits in the DCI, i.e. the method applicable only to the combination C) indicates 6 transmission modes in the general method with 1 bit and 3 transmission modes in the general method with 2 bits. Therefore, the maximum length of the DCI new indication field is smaller than that of the embodiment shown in fig. 3, and in actual transmission, the DCI overhead of the method only applicable to the combination C) is smaller (since the method corresponds to the DCI new indication field code point having more kinds of operation modes and having smaller overhead such as 1 bit and 2 bits compared with the general method in the embodiment shown in fig. 3).

This embodiment is only applicable to the method of the combination C) and can solve the problem that the unified TCI framework is extended to the single DCI based multi-TRP scenario where UL and DL transmissions may not be able to operate in different transmission modes, and the new indication field is used in the DCI to indicate the transmission mode. The new indication field in the DCI indicates the UL and DL transmission modes of the UE to all TRPs configured as the joint TCI mode, and the UE to the UL and DL transmission modes of the TRPs configured as the independent TCI mode is determined by the TCI states of the TRPs corresponding to the TCI code points. Thus, when the TCI code point corresponds to the TCI state of the TRP configured as the joint TCI mode and the current transmission mode do not match, the transmission mode of these TRPs is determined using a method only applicable to the combination C), and the TCI code point corresponds to the TCI state of these TRPs only for updating the TCI state of these TRPs, the method can solve the contradiction between the switching of the transmission mode of all TRPs configured as the joint TCI mode by the UE and the updating of only the TCI state while keeping the transmission mode unchanged for the TRPs configured as the joint TCI mode. When the method only suitable for the combination C) is used, the base station can dynamically adjust the mapping condition of the newly added indication domain and the transmission mode in the DCI according to the actual use condition of the UE through the newly added parameter in the MAC CE, so that the frequently used transmission mode corresponds to the code point with less bits of the newly added indication domain of the DCI, the less used transmission mode corresponds to the code point with more bits of the newly added indication domain of the DCI, thereby reducing the cost of the DCI in actual transmission, and compared with the general method in the first embodiment, the method is equivalent to the code point of the newly added indication domain of the DCI with more working modes corresponding to 1 bit, 2 bit and the like and having smaller cost.

Optionally, the terminal and the plurality of network side devices communicate based on multiple DCIs, where the DCIs is a DCI sent by a target network side device in the plurality of network side devices, and the first target transmission mode is used to indicate a transmission mode between the terminal and the target network side device, or the first target transmission mode is used to indicate a transmission mode between the terminal and the plurality of network side devices.

Wherein, the network side device may refer to the TRP. The scene characterized by the terminal and the plurality of network side devices for communication based on multi-DCI is as follows: the terminal is based on the scenario of multi-DCI and multi-TRP communication. In the related art, the terminal has the following defects in a scene based on multi-DCI and multi-TRP communication:

1) Similar to the problems described in the background art, when TRP is configured in the joint TCI mode, the UE cannot flexibly transmit these TRP because the UE can select only to transmit uplink and receive downlink or not transmit uplink and receive downlink, cannot select only to transmit uplink but not receive downlink or only to receive downlink but not transmit uplink to TRP configured in the joint TCI mode.

2) For a TRP configured as an individual TCI mode, when the TCI state corresponding to the TCI code point to be used does not match with the transmission mode to be used, the TCI state corresponding to the TCI code point and the transmission mode cannot be used simultaneously, for example, for a TRP configured as an individual TCI mode, the UL TCI state to be used corresponds to only a certain TCI code point, and the code point corresponds to both UL TCI state and DL TCI state, but when the transmission mode of the TRP is UL transmission only, the UE cannot perform UL transmission on the TRP using only the UL TCI state. Because the UE can only UL transmit the TRP using the TCI state corresponding to the TCI code point only associated with the UL TCI state according to the mapping of the TCI code point and the TCI state, or UL transmit the TRP using the UL TCI state desired to be used and DL receive the TRP using the corresponding DL TCI state.

Based on the above drawbacks, there are two types of ways to indicate TCI mode for the general methods of combination a), combination B) and combination C): the first type is that a third indication domain (for example, M-DCI based TRP Pattern indicator) is newly added in only one DCI to indicate the transmission modes of the UE to all TRPs, and at this time, the first target transmission mode is used to indicate the transmission modes between the terminal and all third network side devices; and second, a third indication domain is added in each DCI, and is used for indicating the transmission mode of the UE to each TRP, wherein the first target transmission mode is used for indicating the transmission mode between the terminal and the target network side equipment. Wherein the third indication field has the same function as the first indication field in the above embodiment.

For the first mode, only a third indication domain is newly added in one DCI, the length is between 0 and (2M-1) bits which are configurable, the length is determined by a fifth parameter (for example, M-DCI based tpi-Switch-r 18) which is newly added in the RRC IE, the mapping relation between all transmission modes and code points of the newly added third indication domain in the DCI is determined by a sixth parameter (for example, M-DCI based TRP Pattern) which is newly added in the MAC CE, and the transmission modes of all TRPs of the UE are indicated by using the newly added third indication domain in the DCI. Wherein the fifth parameter has the same function as the first parameter in the above embodiment, and the sixth parameter has the same function as the second parameter in the above embodiment.

At this time, DCI can be newly added in the third indication field to remain (2 ^M+1 -3) code points are set to reserve an indication field.

In the first type of method, it is necessary to determine which DCI the third indicator field is newly added to. There are two methods of determining, the first to use a default rule to determine which DCI to add a third indicator field to, and the second to add a third indicator field to the DCI associated with the coreetpolindex value by a seventh parameter (e.g., M-DCI based tpi-r 18) to the MAC CE.

The default rule is used to determine, for example, that since each TRP is associated with one coresetpoolndex value, among the TRPs that the UE is to receive downstream, the coresetpoolndex values associated with these TRPs, wherein the largest (or smallest) coresetpoolndex value associated with the TRP corresponds to which the third indication field is newly added for determining the transmission mode of the UE for all the TRPs.

In the seventh parameter newly added in the MAC CE, a coresetpoolndex value is determined, a third indication field is newly added in the DCI corresponding to the TRP associated with the coresetpoolndex value, and the DCI is newly added with the third indication field to determine the transmission mode of the UE for all the TRPs.

When the first type of mode is used, in the actual transmission process, the base station can remap the transmission mode to the code point of the newly added third indication domain of the DCI according to the frequency of the actually used working mode of the UE (for example, the frequency is larger than a preset value in a preset time), and the code point is carried by the MAC CE, so that the frequently used transmission mode corresponds to the code point with fewer bits of the newly added third indication domain of the DCI, and the less used transmission mode corresponds to the code point with more bits of the newly added third indication domain of the DCI, thereby reducing the cost of the DCI in the actual transmission.

In the second mode, a third indication field is newly added to each DCI with a length of 2 bits (four code points thereof correspond to the transmission conditions of the TRP by the 4 UEs respectively, UL transmission is performed only on the TRP, DL reception is performed only on the TRP, UL transmission is performed on the TRP and DL reception is performed on the TRP, UL transmission is not performed on the TRP and DL reception is not performed), total overhead is 2 mbits, the mapping relationship between the transmission mode and the code point of the newly added third indication field in the DCI is determined by the sixth parameter added in the MAC CE (the specific mapping relationship between the code point of the newly added indication field in each DCI and the transmission conditions of the TRP by the 4 UEs may be the same, so as to avoid bringing about a great MAC CE overhead), and the mapping relationship may be configured as a default rule.

In the multi-TRP scenario based on multi-DCI, when the TCI state corresponding to the TCI code point to be used and the transmission mode to be used are not matched for the TRP configured as the single TCI mode, the TCI state corresponding to the TCI code point and the transmission mode cannot be used simultaneously, for example, for a certain TRP configured as the single TCI mode, the TCI code point in the current DCI is associated with at most 8 TCI state combinations, and one possible mapping relationship between the TCI code point and the TCI state is as follows:

table 5 mapping of TCI code points corresponding to TRP m configured as individual TCI mode to TCI states

TCI code point	TRP m	TRP m
			000	/	/
001	DL TCI 1	/
			010	/	UL TCI 5
011	DL TCI 2	UL TCI 4
			100	DL TCI 7	UL TCI 5
101	DL TCI 9	/
			110	/	UL TCI 11
111	DL TCI 12	UL TCI 4

At this time, if only the UE receives the TRP m in DL, and the TCI state required to be used by the UE is DL TCI 7, the new indication field in the DCI determines the transmission mode, and determines that the UE receives the TRP m in DL only, since the TCI state DL TCI 7 corresponds to only the TCI code point 100 in the DCI, and the TCI code point 100 in the DCI determines the TCI state to be used, the UE can use only DL TCI 7 for DL reception of TRP m. For TRP configured as joint TCI mode, the above problem is not existed, the transmission mode is determined by adding indication domain, and then TCI state to be used is determined by TCI code point in DCI, thus realizing that UL and DL work in different transmission modes.

In this embodiment, in a multi-TRP scenario based on multiple DCIs, the first and second general types of modes can realize that UL and DL operate in different transmission modes, and when the first type of mode is used, the base station can dynamically adjust the mapping condition of the newly added indication field and the transmission mode in the DCI by adding the sixth parameter in the MAC CE according to the actual use condition of the UE, so that the frequently used transmission mode corresponds to the code point with fewer bits in the newly added indication field of the DCI, and the less used transmission mode corresponds to the code point with more bits in the newly added indication field of the DCI, thereby reducing the cost of the DCI in actual transmission. For the TRP configured as an independent TCI mode, if the TCI state corresponding to the TCI code point to be used is not matched with the transmission mode to be used, a general method is used for determining the transmission mode to be used, and then the TCI state corresponding to the TCI code point in DCI is used for determining the corresponding TCI state to be used, so that the TCI state corresponding to the TCI code point and the transmission mode can be used simultaneously.

Optionally, the DCI includes a TCI code point, the terminal communicates with the plurality of network side devices based on multiple DCIs, the plurality of network side devices including at least one third network side device configured to combine a TCI mode and at least one fourth network side device configured to be a single TCI mode, the DCI being a DCI transmitted by a target network side device of the at least one third network side device, the first target transmission mode being used to indicate a transmission mode between the terminal and the target network side device, or the first target transmission mode being used to indicate a transmission mode between the terminal and the at least one third network side device, the method further comprising:

Acquiring a TCI code point in the DCI;

and determining a third target transmission mode corresponding to the TCI code point based on a fourth mapping relation data set, wherein the fourth mapping relation data set comprises mapping relations between at least two TCI code points and transmission modes, and the third target transmission mode is used for indicating the transmission mode between the terminal and the fourth network side equipment.

The third network side device may refer to the TRP described in the foregoing embodiment, and the fourth network side device may be other TRP except for the third network side device.

This embodiment is a further improvement of the general method in the scenario where the above-described terminal communicates based on multiple DCI and multiple TRP. In an embodiment corresponding to a general method in a scenario of multi-DCI and multi-TRP communication, the terminal determines a transmission mode of the terminal by using a new indication field for each of the combinations a), B) and C). However, the technical problems described in the background art only exist due to the above-described scene of the combination C). Therefore, in the embodiment of the present disclosure, the transmission mode of the terminal is determined only for the above-mentioned scenario of the combination C) by adding the indication field, and for the above-mentioned scenarios of the combination a) and the combination B), the transmission mode of the terminal may be determined along the method of adopting the TCI state in the related art.

For combination C), i.e. part of the TRP is configured as a combined TCI mode and part of the TRP is configured as a separate TCI mode, the method of the above described embodiments and the method of the separate TCI mode indicating UL and DL operation modes may be combined, i.e. only the method of combination C) is applicable. There are two types of ways to indicate TCI mode: the first type, only a fourth indication field (for example, M-DCI based TRP Pattern indicator) is newly added in one DCI, and indicates a transmission mode of the UE to all TRPs configured as a joint TCI mode, and the transmission modes of the UE to the rest TRPs are determined by the number of respective TCI states, where the third target transmission mode is used to indicate the transmission modes between the terminal and all fourth network side devices; and a second type, in which a fourth indication field is newly added in each DCI, for indicating the transmission mode of each TRP configured as a joint TCI mode to the UE, the transmission modes of the UE to the rest TRPs are determined by the number of the respective TCI states, and at this time, the third target transmission mode is used for indicating the transmission mode between the terminal and the target network side device.

In the first mode, only a fourth indication field is newly added in one DCI, the length of the fourth indication field is configurable 0 to 2N bits, the length of the fourth indication field is determined by newly adding an eighth parameter (for example, M-DCI based tpi-Switch-r 18) in the RRC IE, and a mapping relationship between all transmission modes and code points of the newly added fourth indication field in the DCI is determined by newly adding a ninth parameter (for example, M-DCI based TRP Pattern) in the MAC CE, so that the transmission modes of the UE on all TRPs configured as the joint TCI mode are indicated, and the transmission modes of the UE on the rest of the TRPs (that is, the TRPs configured as the individual TCI mode) are determined by the number of respective TCI states.

At this time, a fourth indication field may be newly added to the DCI (2 ^2N -2) the code points are set to reserve an indication field.

The first type of method needs to determine which DCI the fourth indicator field is newly added to. There are two methods of determining, the first to use a default rule to determine which DCI to add a fourth indication field to, and the second to add a fourth indication field to the DCI associated with the coreetpolindex value by a tenth parameter (e.g., M-DCI based tpi-r 18) to the MAC CE.

Using default rules to determine, for example, since each TRP is associated with one coresetpoolndex value, among the TRPs that the UE is to receive downstream, coresetpoolndex values associated with those TRPs, wherein the largest (or smallest) coresetpoolndex value associated with the TRP corresponds to a fourth indication field that is used to determine the transmission mode of the UE for all TRPs configured as joint TCI mode.

In the tenth parameter newly added in the MAC CE, a coresetpoolndex value is determined, and a fourth indication field is newly added in DCI corresponding to the TRP associated with the coresetpoolndex value, so as to determine the transmission mode of the UE to all the TRP configured as the joint TCI mode.

When the first type of method is used, in the actual transmission process, the base station can remap the transmission mode to the code point of the third indication domain newly increased by the DCI through the MAC CE according to the frequency of the working mode actually used by the UE (for example, the number of times in the preset time is greater than the preset value), so that the frequently used transmission mode corresponds to the code point of the third indication domain with fewer bits newly increased by the DCI, and the less used transmission mode corresponds to the code point of the DCI with more bits newly increased by the third indication domain, thereby reducing the cost of the DCI in actual transmission.

In the second mode, a fourth indication field is newly added to each DCI corresponding to a TRP configured as a joint TCI mode, the length is 2 bits (four code points of the DCI correspond to the transmission conditions of the TRP by 4 UEs, respectively, UL transmission is performed only on the TRP, DL reception is performed only on the TRP, UL transmission is performed on the TRP as well as DL reception is performed on the TRP, and neither UL nor DL reception is performed on the TRP), the total overhead is 2N bits, and the mapping relation between the transmission mode and the code point of the newly added fourth indication field in the DCI is determined by a new ninth parameter in the MAC CE (the specific mapping relation between the code point of each DCI newly added indication field and the transmission conditions of the TRP by 4 UEs may be the same, so as to avoid bringing about a great MAC CE), or the mapping relation may be configured as a default rule, and the transmission mode of the UE to the rest of the TRP may be determined by the number of respective TCI states.

In this embodiment, in the multi-TRP scenario based on multi-DCI, only the method applicable to the combination C) is capable of implementing that UL and DL operate in different transmission modes, and when the first type of mode is used, the base station may dynamically adjust the mapping condition of the newly added indication field and the transmission mode in the DCI by adding the ninth parameter in the MAC CE according to the actual use condition of the UE, so that the frequently used transmission mode corresponds to the code point with fewer bits in the newly added indication field of the DCI, and the less used transmission mode corresponds to the code point with more bits in the newly added indication field of the DCI, thereby reducing the cost of the DCI in actual transmission. In the first mode, the length of the DCI new indication field is smaller than that of the first mode of the general method, and similar to the relation between the second and first modes, in the actual process, the DCI overhead of the method only applicable to the combination C) in the fifth mode is smaller than that of the fourth mode (because compared with the general method in the fourth mode, the DCI new indication field code point with more kinds of working modes and smaller overhead such as 1 bit and 2 bit is equivalent to that of the DCI new indication field code point with smaller overhead); the total DCI overhead of the second type is fixed 2N bits, which is smaller than that of the general second type.

Optionally, the method further comprises:

receiving a third MAC CE sent by the network side, wherein the third MAC CE comprises a TCI state table and a fifth mapping relation data set, the TCI state table comprises at least two rows of TCI state information, the fifth mapping relation data set comprises mapping relation between at least two TCI code points and the at least two rows of TCI state information, the at least two rows of TCI state information comprises target row TCI state information, the target row TCI state information comprises at least two TCI states, and the terminal is used for determining the TCI state in the communication process with the network side based on the TCI state table and the fifth mapping relation data set.

The DCI includes a first TCI code point, and the communicating with the network side based on the first target transmission mode includes:

determining a target TCI state in the target row TCI state information based on the first target transmission mode if the fifth mapping relation data set characterizes the first TCI code point to correspond to the target row TCI state information, wherein the at least two TCI code points include the first TCI code point, and the first target transmission mode includes the following transmission modes between the terminal and the plurality of network side devices: the uplink transmission mode and the downlink transmission mode;

and communicating with the network side by utilizing the target TCI state based on the first target transmission mode.

In one embodiment of the present disclosure, for a single DCI based multi-TRP scenario: when the combination a), the combination B) and the combination C) are used for indicating the transmission mode by using a general method (i.e., the method of the embodiment shown in fig. 3), since the transmission mode is completely independent of the number of TCI states corresponding to the TCI code points, the TCI state combinations corresponding to part of the TCI code points can be combined.

For combination a), taking 2 TRP as an example, the TCI state combinations corresponding to partial TCI code points may be combined. Combinations of TCI states that may exist are shown in table 6 below:

TABLE 6 TCI State combinations where 2TRP may be present in combination A)

TRP1	TRP2
		/	joint TCI
joint TCI	/
		joint TCI	joint TCI

Where "/" indicates that the corresponding TCI state is null, since the multi-TRP transmission depends on the number of corresponding TCI states, a null joint TCI state indicates that the TRP is not transmitted, a null individual UL TCI state indicates that the TRP is not transmitted, a null individual DL TCI state indicates that the TRP is not received DL, and "/" in the subsequent tables has the same meaning.

At this time, when the transmission mode contradicts the TCI state corresponding to the TCI code point, the transmission mode of the UE is indicated by the newly added indication field in the DCI, not by the number of TCI states. Referring to table 4, the first row indicates the names of TRP, and the second to fourth rows respectively indicate three different TCI states. In the related art, since different TCI states correspond to different transmission modes, the three TCI states need to occupy three rows in the TCI state table. However, in the embodiments of the present disclosure, since the transmission mode is not required to be determined by the TCI state. And the second row to the fourth row have repeated TCI states in practice, and the fourth row can be obtained by combining the second row with the third row. Thus, three different TCI states can be represented by directly using the fourth row. Wherein the fourth row may be one type of the above-mentioned target row TCI status information. Since only one row in the TCI state table is required to characterize a plurality of different TCI states, the combined TCI state table provided in the embodiments of the present disclosure may accommodate more TCI state combinations than the TCI state table in the related art.

Specifically, when it is determined that the TCI state to be used is located in the TCI state information of the target row based on the first TCI code point, since the TCI state information of the target row includes three different TCI states, the operation modes of UL and DL may be further determined by using the new indication field TRP Pattern indicator in the DCI to determine the target TCI state. For example, referring to table 8 below, since row 2 through row 9 TCI states in table 8 may be combined into row 10 TCI state information. I.e. row 10 TCI state information comprises 8 TCI states, so the row 10 TCI state information may be the target row TCI state information. When the target TCI state is determined to be located in the TCI state information of the 10 th row according to the first TCI code point, since the TCI state information of the 10 th row includes 8 TCI states, the target TCI state may be further determined by using the new indication field TRP Pattern indicator in the DCI. Specifically, since the first target transmission mode between the terminal and each TRP may be determined according to the newly added indication field TRP Pattern indicator in the DCI, the first target transmission mode includes the following transmission modes between the terminal and the plurality of network side devices: the uplink transmission mode and the downlink transmission mode. Thus, when the first target transmission mode is determined based on the first code point to be: "terminal does not transmit uplink and downlink to TRP1 and does not transmit uplink and downlink to TRP 2", the table of the non-transmission position in the TCI status information of line 10 may be changed to "/", that is: the TCI state information for line 10 will be transformed into:

TRP 1	TRP1	TRP2	TRP2
				/	UL TCI	DL TCI	/

That is, the target TCI state is finally determined as the TCI state of the 6 th line in table 8 by combining the first TCI code point and the first code point. Similarly, when the first target transmission mode is determined based on the first code point, the first target transmission mode is: when the terminal transmits the TRP1 uplink and downlink and does not transmit the TRP2 uplink and downlink, the target TCI state can be determined to be the TCI state of the 8 th row in the table 8 according to the method. Thus, all TCI states from row 2 to row 9 of table 8 can be recorded using only row 10 of table 8, i.e., the contents of row 2 to row 9 of table 8 can be deleted and used to record further other TCI states.

Similarly, for M TRP, the combinations of TCI states that may exist are:

TABLE 7 TCI State combinations where M TRP may be present in combination A)

At this point, multiple TCI state combinations may be combined, for example, row 2 through (m+1) or row 2 with other rows.

For combination B), taking 2TRP as an example, the TCI state combinations corresponding to partial TCI code points may be combined. Combinations of TCI states that may exist are shown in table 8 below:

table 8 TCI State combinations where 2TRP may be present in combination B)

TRP 1	TRP1	TRP2	TRP2
				DL TCI	UL TCI	/	/
/	/	DL TCI	UL TCI
				DL TCI	/	/	UL TCI
DL TCI	/	DL TCI	UL TCI
				/	UL TCI	DL TCI	/
/	UL TCI	DL TCI	UL TCI

Similarly, for M TRP, the combinations of TCI states that may exist are:

TABLE 9 TCI State combinations where M TRP may be present in combination B)

At this time, the combination can be performed according to the mapping situation of the actual TCI code point and the TCI state combination.

For combination C), taking 2TRP as an example, the TCI state combinations corresponding to partial TCI code points may be combined. For TRP1 configured as a combined TCI mode and TRP2 of a separate TCI mode, the combinations of TCI states that may exist are shown in table 10 below:

table 10 combinations of TCI State combinations where 2TRP may be present in combination C)

Similarly, for M TRP, the combinations of TCI states that may exist are:

table 11 combinations of TCI State combinations where M TRP may be present in C)

The mapping situation possible in practice is as follows in table 12:

TABLE 12 TCI State combinations where M TRP may be present in combination C) in practice

At this time, the merging may be performed according to the actual mapping situation, for example, merging the first row, the second row, the third row and the fourth row in the table.

Tables 6 to 12 above are multi-TRP scenarios for single DCI, and using the general method for combinations a), B) and C) the mapping situation of TCI code points and TCI states can be optimized to accommodate more TCI state combinations.

In another embodiment of the present disclosure, different rows in the TCI state table may also be combined for a multi-DCI based multi-TRP scenario.

Specifically, for multi-DCI based multi-TRP scenarios:

when the combination B) and the combination C) are used for the transmission mode indication by the general method, since the UE has no relation to the transmission mode of the TRP configured as the individual TCI mode and the number of TCI states corresponding to the TCI code point, the TCI state combinations corresponding to the TRP configured as the individual TCI mode can be combined.

For TRP configured as individual TCI mode, taking TRP m as an example, the mapping relationship of the TCI code points and TCI state combinations that may exist is shown in table 13 below:

TABLE 13 TCI State combinations where TRP m configured as an individual TCI mode may be present in combination B) and combination C)

TRP m	TRP m
		/	/
DL TCI	/
		/	UL TCI
DL TCI	UL TCI

At this time, when the transmission mode contradicts the TCI states corresponding to the TCI code points, the transmission mode of the UE is indicated by the newly added indication field in the DCI, but not by the number of TCI states, and the combination cases corresponding to the first row, the second row and the third row may be combined, because even if one TCI code point corresponds to multiple TCI states, transmission/transmission using only some of the TCI states (determining the operation modes of UL and DL using the newly added indication field in the DCI) may be implemented.

In this embodiment, in the multi-TRP scenario based on multi-DCI, the mapping situation of the TCI code points corresponding to the TRP configured as the individual TCI mode and the TCI states can be optimized by using the general method for the combination B) and the combination C), so as to accommodate more TCI state combinations.

The communication method provided by the embodiment of the disclosure has the following beneficial effects:

1. universal method for indicating UL and DL working modes in single DCI-based multi-TRP scene

In a multi-TRP scene based on single DCI, an indication domain is newly added in the DCI, the length of the indication domain is from 0 to (2M-1) bits which can be configured, the length of the indication domain is determined by a newly added higher layer parameter in a control resource set of RRC IE, a transmission mode is mapped to a code point of the newly added indication domain in the DCI by MAC CE, and the working modes of UE UL and DL can be determined by the newly added indication domain in the DCI.

2. Method for indicating UL and DL operation modes applicable only to combination C) in multi-TRP scene based on single DCI

In a single DCI-based multi-TRP scene, the method for indicating the UL and DL working modes of the single DCI is different according to the characteristics of different TCI mode combinations of TRPs. For combinations a) and B), the indication of the operation mode is performed using only a general operation mode indication method; for combination C), either a general operation mode indication method or an indication method applicable only to combination C) may be used.

3. Universal method for indicating UL and DL working modes in multi-TRP scene based on multi-DCI

In a multi-DCI based multi-TRP scenario, there are two general types of ways to indicate the operation mode: the first mode is to only add an indication domain in one DCI to indicate the working mode of the UE to all TRPs, and two methods are available for determining which DCI to add the indication domain in the default mode or specified by parameters in the MAC CE; in the second type, an indication field is newly added to each DCI to indicate the operation mode of the UE for each TRP.

4. Method for indicating UL and DL operation modes applicable only to combination C) in multi-TRP scene based on multi-DCI

In a multi-DCI-based multi-TRP scene, aiming at the characteristics of different TCI mode combinations of TRPs, the method for indicating the UL and DL working modes of the multi-DCI-based multi-TRP scene is different. For combinations a) and B), the indication of the operation mode is performed using only a general operation mode indication method; for combination C), either a general operation mode indication method or an indication method applicable only to combination C) may be used.

5. Dynamic adjustment of correspondence table between newly added indication domain code points and transmission modes

For the common method in the multi-TRP scene based on single DCI and the method only suitable for the combination C) and the first type of the common method in the multi-TRP scene based on multi-DCI and the first type of the method only suitable for the combination C), the base station can change the mapping condition of the transmission mode and the code point of the newly added indication domain in the DCI according to the frequency degree of the transmission mode actually used by the UE, namely, the bit number of the code point of the newly added indication domain in the DCI corresponding to the frequently adopted transmission mode is smaller, and the bit number of the code point of the newly added indication domain in the DCI corresponding to the less adopted transmission mode is larger, so that the cost of the DCI is reduced in actual transmission.

6. Solving the contradiction between switching transmission mode and keeping the transmission mode unchanged and updating only TCI state

For a multi-TRP scene based on single DCI, when the working mode is contradicted with the TCI state corresponding to the code point in the DCI, the working modes of UL and DL are determined by the proposed general method, the TCI state corresponding to the code point is only used for updating the TCI state, and the contradiction between switching of the transmission mode and keeping the transmission mode unchanged and only updating the TCI state can be solved; using a method applicable only to combination C), the contradiction between the transmission mode switching of the UE for the TRPs configured as joint TCI mode and maintaining the transmission mode to update TCI state only can be solved.

7. Solving the problem that the TCI state to be used is not matched with the transmission mode

For a multi-TRP scene based on multi-DCI, for TRPs configured as independent TCI modes, if the TCI states to be used are not matched with the transmission modes, the transmission modes can be determined by the DCI newly added indication domain, and then the corresponding TCI states to be used are determined by the TCI code points in the DCI, so that the TCI states to be used and the transmission modes can be used simultaneously.

8. Method for accommodating more combinations of TCI states without increasing the maximum number of TCI code points and without increasing the maximum number of TCI state combinations activated by a MAC CE

For a single DCI based multi-TRP scenario, the proposed generic approach is used to enable the UL and DL operation modes independent of the number of TCI states corresponding to the TCI code point, whereby the combinations of TCI states can be combined to accommodate more TCI state combinations. For multi-TRP scenarios based on multi-DCI, for combination B) and combination C), in the DCI corresponding to the TRP configured as individual TCI mode, the TCI state combinations corresponding to the TCI code points may be combined, accommodating more TCI state combinations.

In the embodiments of the present disclosure, since there are four cases for the UE to transmit for each TRP:

case 1) UL transmission only

Case 2) DL reception only

Case 3) both UL transmission and DL reception

Case 4) neither UL nor DL reception is performed

Thus, for M TRP transmissions, 4 total ^M Seed transmission case, i.e. 2 ^2M A kind of module is assembled in the module and the module is assembled in the module. For the transmission of the UE with M TRPs, the present disclosure does not consider the case where the UE does not transmit/receive any TRPs, the UE only UL transmissions, and the UE only DL receptions. The UE does not transmit/receive any TRP, i.e. the UE uses all TRP 4), corresponds to 4 ^M 1 case of (a); UE only UL transmission, i.e. UE either uses case 1) or 4) for all TRPs, i.e. of M TRPs, n TRP uses case 1) is arbitrarily selected, for the remaining TRP uses case 4), corresponding to a total of 4 ^M In (a) and (b)Seed case (/ ->Represents the optional n TRP uses from M TRPs 1)), i.e. (2) ^M -1) cases; the UE receives only DL, i.e. the UE uses all TRPs orCase 2) or use case 4), i.e. of M TRPs, arbitrarily select n TRPs to use case 2), for the remaining TRPs use case 4) a total of 4 ^M Is->Seed case (/ ->Represents optional n TRP usage cases 2) from M TRPs, i.e. (2) ^M -1) cases. Thus, the UE has a total of (4 ^M -2(2 ^M -1) -1), i.e. (2) ^2M -2 ^M+1 +1) species. Since keeping the transmission mode unchanged is also regarded as one transmission mode, it is required that the transmission modes corresponding to the code points together be (2 ^2M -2 ^M+1 +2) species.

If the first indication field is 0 bits to (2M-1) bits in length, then (2) ^2M -1) transmission cases (0 bits for 1 case, 1 bit for 2 cases, 2 bits for 2 ² The (2M-1) bit corresponds to 2 ^(2M-1) In the case, therefore, bits 0 to (2M-1) correspond in total to (1+2+2) ² +…+2 ^(2M-1) )＝(2 ^2M -1) cases), and (2) ^2M -1)-(2 ^2M -2 ^M+1 +2)＝(2 ^M+1 -3) > 0; while lengths of 0 bits to (2M-2 bits) may represent only (2 ^2M-1 -1) cases, and (2 ^2M-1 -1)＜(2 ^2M -2 ^M+1 +2). Therefore, the length of the first indication field needs to be configured to be 0 bits to (2M-1) bits to map all transmission cases, and the remaining (2 ^M+1 -3) code points are set to reserve an indication field.

For the method only for combining C), the UL and DL transmission modes of the UE on the TRP configured as the joint TCI mode are determined by the newly added indication field in the DCI, the UE has 4 transmission cases on the TRP configured as the joint TCI mode, namely UL transmission on only the TRP, DL reception on only the TRP, both UL and DL reception on the TRP, and neither UL nor DL reception on the TRP, so the UE has 4 total transmissions on N TRP configured as the joint TCI mode ^N Since the combination case is also regarded as one transmission mode while keeping the transmission mode unchanged, it is necessary that the transmission modes corresponding to the code points are added in total (4 ^N +1) species.

If the length of the DCI new addition indication field is configured to be 0 bit to (2N-1) bit, the DCI new addition indication field only corresponds to (2 ^2N -1) code points, and (4 ^N +1)＞(2 ^2N -1), the number of code points is not sufficient to correspond to all cases of transmission mode at this time. Thus, at least 0 bit to 2N bits are required to be configured, and the remainder (2 ^2N -2) the code points are set to reserve an indication field.

Referring to fig. 9, a flow chart of a communication method according to an embodiment of the disclosure is provided, where the communication method is applied to a network side device and includes:

A sending module 910, configured to send DCI to a terminal, where a first indication field in the DCI includes a first code point, where the first indication field is an indication field for indicating a transmission mode of the terminal, the first code point is used to indicate the transmission mode of the terminal, and transmission modes corresponding to different first code points are different.

Optionally, the method further comprises:

transmitting first RRC information to the terminal, wherein the first RRC information comprises a first parameter, and the first parameter is used for indicating the length of the first indication domain;

and/or the number of the groups of groups,

and sending a first MAC CE to the terminal, wherein the first MAC CE comprises a second parameter, and the second parameter comprises the first mapping relation data set.

Optionally, after the sending the first RRC information and the first MAC CE to the terminal, the method further includes:

updating the mapping relation in the first mapping relation data set based on the using frequency of the terminal to each transmission mode in a preset time period to obtain a second mapping relation data set, wherein the length of a code point corresponding to the transmission mode with higher using frequency of the terminal is smaller, and the terminal determines the transmission mode of the terminal based on the first mapping relation data set in the preset time period;

And sending a second MAC CE to the terminal, wherein the second MAC CE comprises a third parameter, and the third parameter comprises the second mapping relation data set.

The method for communication provided in this embodiment is a method step on the network side in the communication method provided in the foregoing embodiment, and a specific implementation process of the method corresponds to the foregoing embodiment, and the same beneficial effects can be achieved, so that repetition is avoided, and no further description is given here.

Referring to fig. 10, a schematic structural diagram of a terminal 1000 according to an embodiment of the disclosure is provided, where the terminal 1000 includes:

an obtaining module 1001, configured to obtain, when downlink control information DCI is received, a first code point of a first indication field in the DCI, where the first indication field is an indication field for indicating a transmission mode of the terminal 1000;

a determining module 1002, configured to determine a first target transmission mode corresponding to the first code point based on a first mapping relationship data set, where the first mapping relationship data set includes a mapping relationship between at least two code points and a transmission mode, the at least two code points include the first code point, and the first target transmission mode is used to indicate at least one of the following transmission modes between the terminal 1000 and a network side: the network side comprises a plurality of network side devices;

And a communication module 1003, configured to communicate with the network side based on the first target transmission mode.

Optionally, the terminal 1000 further includes:

a receiving module, configured to receive first radio resource control RRC information sent by the network side, where the first RRC information includes a first parameter, where the first parameter is used to indicate a length of the first indication domain;

the obtaining module 1001 is specifically configured to obtain, in the DCI, a first code point of a first indication field based on a length indicated by the first parameter;

and/or the number of the groups of groups,

the receiving module is further configured to receive a first MAC CE sent by the network side, where the first MAC CE includes a second parameter, and the second parameter includes the first mapping relation data set.

Optionally, the receiving module is further configured to receive a second MAC CE sent by the network side, where the second MAC CE includes a third parameter, and the third parameter includes a second mapping relationship data set, and the second mapping relationship data set is: the network side updates the mapping relation in the first mapping relation data set to obtain a data set based on the use frequency of the terminal 1000 for each transmission mode in a preset time period, wherein in the second mapping relation data set, the length of a code point corresponding to a transmission mode with higher use frequency of the terminal 1000 is smaller, and the terminal 1000 determines the transmission mode of the terminal 1000 based on the first mapping relation data set in the preset time period;

The terminal 1000 further comprises:

and the updating module is used for updating the mapping relation in the first mapping relation data set into the mapping relation in the second mapping relation data set.

Optionally, the DCI includes a transmission configuration indication TCI code point, the terminal communicates with the plurality of network side devices based on a single DCI, the plurality of network side devices includes at least one first network side device configured to be in a joint TCI mode and at least one second network side device configured to be in a separate TCI mode, the first target transmission mode is used to indicate a transmission mode between the terminal and the first network side device, and the obtaining module 1001 is further configured to obtain the TCI code point in the DCI;

the determining module 1002 is further configured to determine a second target transmission mode corresponding to the TCI code point based on a third mapping relationship data set, where the third mapping relationship data set includes mapping relationships between at least two TCI code points and transmission modes, and the second target transmission mode is used to indicate a transmission mode between the terminal 1000 and the second network side device.

Optionally, the DCI includes a TCI code point, the terminal communicates with the plurality of network side devices based on multiple DCIs, the plurality of network side devices includes at least one third network side device and at least one fourth network side device, the third network side device is configured to combine a TCI mode, the fourth network side device is configured to be a single TCI mode, the DCI is a DCI sent by a target network side device in the at least one third network side device, the first target transmission mode is used to indicate a transmission mode between the terminal and the target network side device, or the first target transmission mode is used to indicate a transmission mode between the terminal and the at least one third network side device, and the obtaining module 1001 is further used to obtain the TCI code point in the DCI;

The determining module 1002 is further configured to determine a third target transmission mode corresponding to the TCI code point based on a fourth mapping relation data set, where the fourth mapping relation data set includes mapping relations between at least two TCI code points and transmission modes, and the third target transmission mode is used to indicate a transmission mode between the terminal and the fourth network side device.

Optionally, the receiving module is further configured to receive the network side to send a third MAC CE, where the third MAC CE includes a TCI state table and a fifth mapping relationship data set, where the TCI state table includes at least two rows of TCI state information, the fifth mapping relationship data set includes a mapping relationship between at least two TCI code points and the at least two rows of TCI state information, the at least two rows of TCI state information includes target row TCI state information, the target row TCI state information includes at least two TCI states, and the terminal is configured to determine, based on the TCI state table and the fifth mapping relationship data set, a TCI state in a communication process with the network side.

Optionally, the communication module 1003 is specifically configured to determine, when the fifth mapping relationship data set characterizes that the first TCI code point corresponds to the target row TCI state information, a target TCI state in the target row TCI state information based on the first code point, where the at least two TCI code points include the first TCI code point, and the first target transmission mode includes the following transmission modes between the terminal and the plurality of network side devices: the uplink transmission mode and the downlink transmission mode;

The communication module 1003 is specifically further configured to communicate with the network side using the target TCI state based on the first target transmission mode.

It should be noted that, for avoiding repeated description, the implementation manner of this embodiment may refer to the related description of the embodiment shown in fig. 2, which is not repeated.

Referring to fig. 11, a schematic structural diagram of a network side device 1100 according to an embodiment of the disclosure is provided, where the network side device 1100 includes:

a sending module 1101, configured to send DCI to a terminal, where a first indication field in the DCI includes a first code point, where the first indication field is an indication field for indicating a transmission mode of the terminal, the first code point is used to indicate the transmission mode of the terminal, and transmission modes corresponding to different first code points are different.

Optionally, the sending module 1101 is further configured to send first RRC information to the terminal, where the first RRC information includes a first parameter, and the first parameter is used to indicate a length of the first indication domain;

and/or the number of the groups of groups,

the sending module 1101 is further configured to send a first MAC CE to the terminal, where the first MAC CE includes a second parameter, and the second parameter includes the first mapping relation data set.

Optionally, the network side device 1100 further includes:

the updating module is used for updating the mapping relation in the first mapping relation data set to obtain a second mapping relation data set based on the using frequency of the terminal for each transmission mode in a preset time period, wherein the length of a code point corresponding to the transmission mode with higher using frequency of the terminal is smaller, and the terminal determines the transmission mode of the terminal based on the first mapping relation data set in the preset time period;

the sending module 1101 is further configured to send a second MAC CE to the terminal, where the second MAC CE includes a third parameter, and the third parameter includes the second mapping relation data set.

It should be noted that, for avoiding repeated description, the implementation manner of this embodiment may refer to the related description of the embodiment shown in fig. 9, which is not repeated.

The embodiment of the disclosure also provides communication equipment. Referring to fig. 12, a communication device may include a processor 1201, a memory 1202, and a program 12021 stored on the memory 1202 and executable on the processor 1201.

In the case that the communication device is a terminal, the program 12021, when executed by the processor 1201, may implement any steps and achieve the same advantageous effects in the method embodiment corresponding to fig. 2, which will not be described herein.

In the case that the communication device is a network side device, when the program 12021 is executed by the processor 1201, any steps and the same beneficial effects in the method embodiment corresponding to fig. 9 may be achieved, which will not be described herein.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of implementing the methods of the embodiments described above may be implemented by hardware associated with program instructions, where the program may be stored on a readable medium. The embodiment of the present disclosure further provides a readable storage medium, where a computer program is stored, where the computer program when executed by a processor may implement any step in the method embodiments corresponding to fig. 2 or fig. 9, and may achieve the same technical effects, and in order to avoid repetition, no further description is given here.

Such as Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic or optical disk, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present disclosure is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present disclosure may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk), including several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present disclosure.

The embodiments of the present disclosure have been described above with reference to the accompanying drawings, but the present disclosure is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the disclosure and the scope of the claims, which are all within the protection of the present disclosure.

Claims

1. A communication method applied to a terminal, comprising:

communicating with the network side based on the first target transmission mode;

the method further comprises the steps of:

2. The method according to claim 1, wherein the method further comprises, in case of receiving downlink control information, DCI, before acquiring the first code point of the first indication field in the DCI:

and/or the number of the groups of groups,

3. The method of claim 1, wherein the terminal communicates with the plurality of network side devices based on a single DCI, and wherein the first target transmission mode is used to indicate a transmission mode between the terminal and the plurality of network side devices.

4. The method of claim 1, wherein the DCI includes a transmission configuration indication, TCI, code points, the terminal communicates with the plurality of network side devices based on a single DCI, the plurality of network side devices including at least one first network side device configured to associate with a TCI mode and at least one second network side device configured to associate with a TCI mode, the first target transmission mode being used to indicate a transmission mode between the terminal and the first network side device, the method further comprising:

acquiring a TCI code point in the DCI;

and determining a second target transmission mode corresponding to the TCI code point based on a third mapping relation data set, wherein the third mapping relation data set comprises mapping relations between at least two TCI code points and transmission modes, and the second target transmission mode is used for indicating the transmission mode between the terminal and the second network side equipment.

5. The method of claim 1, wherein the terminal communicates with the plurality of network-side devices based on multiple DCIs, the DCIs being sent by a target network-side device of the plurality of network-side devices, the first target transmission mode is used to indicate a transmission mode between the terminal and the target network-side device, or the first target transmission mode is used to indicate a transmission mode between the terminal and the plurality of network-side devices.

6. The method of claim 1, wherein the DCI comprises a TCI code point, the terminal communicates with the plurality of network side devices based on multiple DCIs, the plurality of network side devices including at least one third network side device configured to combine a TCI mode and at least one fourth network side device configured to be a single TCI mode, the DCI being a DCI transmitted by a target network side device of the at least one third network side device, the first target transmission mode being used to indicate a transmission mode between the terminal and the target network side device, or the first target transmission mode being used to indicate a transmission mode between the terminal and the at least one third network side device, the method further comprising:

acquiring a TCI code point in the DCI;

7. The method according to any one of claims 1 to 6, further comprising:

8. The method of claim 7, wherein the DCI includes a first TCI code point, the communicating with the network side based on the first target transmission mode comprises:

determining a target TCI state in the target row TCI state information based on the first code point, where the at least two TCI code points include the first TCI code point, and the first target transmission mode includes the following transmission modes between the terminal and the plurality of network side devices, where the fifth mapping relation data set characterizes the first TCI code point to correspond to the target row TCI state information: the uplink transmission mode and the downlink transmission mode;

9. A communication method applied to a network side device, comprising:

transmitting DCI to a terminal, wherein a first indication domain in the DCI comprises a first code point, the first indication domain is an indication domain for indicating a transmission mode of the terminal, the first code point is used for indicating the transmission mode of the terminal, and the transmission modes corresponding to different first code points are different;

the method further comprises the steps of:

10. The method according to claim 9, wherein the method further comprises:

and/or the number of the groups of groups,

and sending a first MAC CE to the terminal, wherein the first MAC CE comprises a second parameter, and the second parameter comprises a first mapping relation data set.

11. A terminal, comprising:

an obtaining module, configured to obtain, when downlink control information DCI is received, a first code point of a first indication field in the DCI, where the first indication field is an indication field for indicating a transmission mode of the terminal;

a determining module, configured to determine a first target transmission mode corresponding to the first code point based on a first mapping relationship data set, where the first mapping relationship data set includes a mapping relationship between at least two code points and a transmission mode, the at least two code points include the first code point, and the first target transmission mode is used to indicate at least one of the following transmission modes between the terminal and a network side: the network side comprises a plurality of network side devices;

the communication module is used for communicating with the network side based on the first target transmission mode;

The receiving module is further configured to receive a second MAC CE sent by the network side, where the second MAC CE includes a third parameter, and the third parameter includes a second mapping relationship data set, and the second mapping relationship data set is: the network side updates the mapping relation in the first mapping relation data set to obtain a data set based on the using frequency of the terminal to each transmission mode in a preset time period, wherein in the second mapping relation data set, the length of a code point corresponding to the transmission mode with higher using frequency of the terminal is smaller, and the terminal determines the transmission mode of the terminal based on the first mapping relation data set in the preset time period;

the terminal further comprises:

12. A network side device, comprising:

a sending module, configured to send DCI to a terminal, where a first indication field in the DCI includes a first code point, where the first indication field is an indication field used to indicate a transmission mode of the terminal, the first code point is used to indicate the transmission mode of the terminal, and transmission modes corresponding to different first code points are different;

The network side device further includes:

the sending module is further configured to send a second MAC CE to the terminal, where the second MAC CE includes a third parameter, and the third parameter includes the second mapping relation data set.

13. A communication device, comprising: a memory, a processor, and a program stored on the memory and executable on the processor; -characterized in that the processor is arranged to read a program in a memory for implementing the steps in the communication method according to any of claims 1 to 10.

14. A readable storage medium storing a program, wherein the program when executed by a processor implements the steps in the communication method according to any one of claims 1 to 10.