Method, device and computer storage medium for communication

Abstract

Embodiments of the present disclosure relate to methods, devices, and computer-readable media for DMRS transmission and reception. A method includes: determining control information for scheduling a physical shared channel at a device, the control information indicating a plurality of TCI states to be used for communication with another device; in response to a plurality of transmission opportunities of the physical shared channel being configured by the control information to be scheduled, determining a group of transmission opportunities associated with one of the plurality of TCI states from the plurality of transmission opportunities; for the group of transmission opportunities, determining a corresponding resource allocation for transmitting at least one DMRS of the physical shared channel to the other device; and transmitting the at least one DMRS to the other device during the group of transmission opportunities based on the resource allocation and the TCI state.

Description

Technical Field

[0001] Embodiments of the present disclosure relate generally to the field of telecommunications, and more particularly to methods, devices, and computer storage media for communications. Background Art

[0002] In New Radio Access (NR), a network device (e.g., next generation NodeB (gNB)) may be equipped with multiple transmit and receive points (TRPs) or multiple antenna panels. That is, the network device may communicate with a terminal device (e.g., user equipment (UE)) via one or more of the multiple TRPs or multiple antenna panels, which is also referred to as "multi-TRP communication".

[0003] In some multi-TRP communication schemes, a single downlink control information (DCI) can be used to schedule multiple physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) repetitions to achieve better performance. The number of PDSCH or PUSCH repetitions scheduled by a single DCI can be 1, 2, 4, or 8. Each repetition can occupy at least two symbols, one for the DMRS of the physical shared channel (i.e., PDSCH or PUSCH) and the other for data. Therefore, if the number of repetitions scheduled by a single DCI is 4, at least 8 symbols are required. If the number of repetitions scheduled by a single DCI is 8, at least 16 symbols are required, which may exceed the length of the time slot. That is, if each repetition includes at least one symbol for sending / receiving DMRS, many resources may be wasted and 8 PDSCH or PUSCH repetitions cannot be achieved in one time slot. Summary of the invention

[0004] Generally speaking, example embodiments of the present disclosure provide methods, devices, and computer storage media for communications.

[0005] In a first aspect, a communication method is provided. The method includes: determining control information for scheduling a physical shared channel at a device, the control information indicating a plurality of transmission control indication (TCI) states to be used for communicating with another device on the physical shared channel; in response to a plurality of transmission opportunities of the physical shared channel being configured to be scheduled by the control information, determining a group of transmission opportunities associated with one of the plurality of TCI states from the plurality of transmission opportunities; for the group of transmission opportunities, determining corresponding resource allocations for transmitting at least one demodulation reference signal (DMRS) of the physical shared channel to the other device; and transmitting the at least one DMRS to the other device during the group of transmission opportunities based on the resource allocations and the TCI states.

[0006] In a second aspect, a communication method is provided. The method includes: determining control information for scheduling a physical shared channel at a device, the control information indicating a plurality of transmission control indication (TCI) states to be used for communicating with another device on the physical shared channel; in response to a plurality of reception opportunities of the physical shared channel being configured to be scheduled by the control information, determining a group of reception opportunities associated with one of the plurality of TCI states from the plurality of reception opportunities; for the group of reception opportunities, determining a corresponding resource allocation for receiving at least one demodulation reference signal (DMRS) of the physical shared channel from the other device; and receiving the at least one DMRS from the other device during the group of reception opportunities based on the resource allocation and the TCI state.

[0007] In a third aspect, a communication device is provided. The communication device includes a processor and a memory. The memory is coupled to the processor and stores instructions thereon. The instructions, when executed by the processor, cause the device to perform actions including the following steps: determining control information for scheduling a physical shared channel at the device, the control information indicating a plurality of transmission control indication (TCI) states to be used for communicating with another device on the physical shared channel; in response to a plurality of transmission opportunities of the physical shared channel being configured to be scheduled by the control information, determining a group of transmission opportunities associated with one of the plurality of TCI states from the plurality of transmission opportunities; for the group of transmission opportunities, determining a corresponding resource allocation for transmitting at least one demodulation reference signal (DMRS) of the physical shared channel to the other device; and transmitting the at least one DMRS to the other device during the group of transmission opportunities based on the resource allocation and the TCI state.

[0008] In a fourth aspect, a communication device is provided. The communication device includes a processor and a memory. The memory is coupled to the processor and stores instructions thereon. The instructions, when executed by the processor, cause the device to perform actions including the following steps: determining control information for scheduling a physical shared channel at the device, the control information indicating a plurality of transmission control indication (TCI) states to be used for communicating with another device on the physical shared channel; in response to a plurality of reception opportunities of the physical shared channel being configured to be scheduled by the control information, determining a group of reception opportunities associated with one of the plurality of TCI states from the plurality of reception opportunities; for the group of reception opportunities, determining a corresponding resource allocation for receiving at least one demodulation reference signal (DMRS) of the physical shared channel from the other device; and receiving the at least one DMRS from the other device during the group of reception opportunities based on the resource allocation and the TCI state.

[0009] In a fifth aspect, there is provided a computer readable medium having instructions stored thereon, which when executed on at least one processor causes the at least one processor to perform the method according to the first aspect.

[0010] In a sixth aspect, there is provided a computer readable medium having stored thereon instructions which, when executed on at least one processor, cause the at least one processor to perform the method according to the second aspect.

[0011] Other features of the present disclosure will become apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of some embodiments of the present disclosure in the accompanying drawings, in which:

[0013] Figure 1 shows an example communication network in which some embodiments of the present disclosure may be implemented;

[0014] Figure 2 shows an example signaling diagram illustrating an example process according to some embodiments of the present disclosure;

[0015] FIG. 3A to FIG. 3B An example diagram showing resource allocation according to some embodiments of the present disclosure;

[0016] FIG. 4A to FIG. 4B An example diagram showing resource allocation according to some embodiments of the present disclosure;

[0017] FIG. 5A to FIG. 5B An example diagram showing resource allocation according to some embodiments of the present disclosure;

[0018] Figure 6 An example diagram showing resource allocation according to some embodiments of the present disclosure;

[0019] 7A to 7E An example diagram showing resource allocation according to some embodiments of the present disclosure;

[0020] FIG. 8A to FIG. 8D An example diagram showing resource allocation according to some embodiments of the present disclosure;

[0021] 9A to 9C An example diagram showing resource allocation according to some embodiments of the present disclosure;

[0022] Fig.10 An example method according to some embodiments of the present disclosure is shown;

[0023] Fig.11illustrates example methods according to some embodiments of the present disclosure; and

[0024] Fig.12 is a simplified block diagram of a device suitable for implementing an embodiment of the present disclosure.

[0025] Throughout the drawings, the same or similar reference numerals represent the same or similar elements. DETAILED DESCRIPTION

[0026] The principle of the present disclosure will now be described with reference to some example embodiments. It should be understood that these embodiments are described only to illustrate and help those skilled in the art to understand and implement the present disclosure, and do not imply any limitation on the scope of the present disclosure. The present disclosure described herein can be implemented in various ways other than the ways described below.

[0027] In the following description and in the claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0028] As used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. The term "including" and its variations should be understood as open terms, meaning "including but not limited to". The term "based on" should be understood as "based at least in part on". The terms "one embodiment" and "an embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may be included below.

[0029] In some examples, values, processes, or devices are referred to as "best," "lowest," "highest," "minimum," "maximum," etc. It should be understood that such descriptions are intended to indicate that a selection may be made among many functional alternatives for use, and that such selection is not necessarily better, lesser, higher, or more preferred than other selections.

[0030] Figure 1 1 shows an example communication network 100 in which embodiments of the present disclosure may be implemented. Figure 1 As shown, network 100 includes network device 110, which is coupled to two TRPs / panels 120-1 and 120-2 (collectively referred to as TRP 120 or individually referred to as TRP 120). Network 100 also includes terminal device 130 served by network device 110. It should be understood that Figure 1 The number of network devices, terminal devices, and TRPs shown in FIG. 2 is for illustrative purposes only and does not constitute any limitation. Network 200 may include any suitable number of devices suitable for implementing the embodiments of the present disclosure.

[0031] As used herein, the term "terminal device" refers to any device with wireless or wired communication capabilities. Examples of terminal devices include, but are not limited to, user equipment (UE), personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs), portable computers, image capture devices such as digital cameras, gaming devices, music storage and playback devices, or Internet devices capable of wireless or wired Internet access and browsing, etc. For the purpose of discussion, some embodiments will be described below with reference to user equipment as an example of terminal device 130.

[0032] As used herein, the term "network equipment" or "base station" (BS) refers to equipment that can provide or accommodate a cell or coverage area in which a terminal device can communicate. Examples of network equipment include, but are not limited to, Node B (Node B or NB), evolved Node B (eNodeB or eNB), next generation Node B (gNB), remote radio unit (RRU), radio head (RH), remote radio head (RRH), low power nodes such as femto nodes, pico nodes, etc.

[0033] As used herein, the term "TRP" refers to an antenna array (having one or more antenna elements) available to a network device located in a particular geographic location. For example, a network device can be coupled to multiple TRPs in different geographic locations to achieve better coverage. It should be understood that a TRP may also be referred to as a "panel," which also refers to an antenna array (having one or more antenna elements) or a group of antennas.

[0034] like Figure 1 As shown, the network device 110 can communicate with the terminal device 130 via TRP 120-1 and TRP 120-2. In the following, TRP 120-1 may also be referred to as a first TRP, and TRP 120-2 may also be referred to as a second TRP. Each TRP 120 may provide multiple beams for communicating with the terminal device 130.

[0035] Communications in network 100 may conform to any suitable standard, including but not limited to Long Term Evolution (LTE), LTE-Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), and Global System for Mobile Communications (GSM). In addition, communications may be performed according to any generation of communications protocols currently known or developed in the future. Examples of communications protocols include but are not limited to first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, and fifth generation (5G) communications protocols.

[0036] As described above, in some multi-TRP communication schemes, a single downlink control information (DCI) can be used to schedule multiple physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) repetitions to achieve better performance. The number of PDSCH or PUSCH repetitions scheduled by a single DCI can be 1, 2, 4, or 8. Each repetition can occupy at least two symbols, one symbol for the DMRS of the physical shared channel (i.e., PDSCH or PUSCH) and the other symbol for data. Therefore, if the number of repetitions scheduled by a single DCI is 4, at least 8 symbols are required. If the number of repetitions scheduled by a single DCI is 8, at least 16 symbols are required, which may exceed the length of the time slot. That is, if each repetition includes at least one symbol for sending / receiving DMRS, many resources may be wasted and 8 PDSCH or PUSCH repetitions cannot be achieved in one time slot.

[0037] The example embodiments of the present disclosure provide a solution for multi-TRP communication. The solution disables DMRS transmission and reception in at least one of the PDSCH or PUSCH repetitions. In addition, the solution allows different resource modes to be used in different repetitions. Therefore, this solution can achieve better resource utilization. In addition, the solution can also achieve backward compatibility of scheduling of PDSCH or PUSCH repetitions in multi-TRP communication, thereby achieving high performance.

[0038] Figure 2 An example signaling diagram illustrating an example process 200 according to some embodiments of the present disclosure is shown. Figure 2 As shown, process 200 may involve two devices 201 and 202. It should be understood that process 200 may include additional actions not shown and / or may omit some of the actions shown, and the scope of the present disclosure is not limited in this regard.

[0039] In some embodiments, in PUSCH communication, the device 201 may be as follows Figure 1 The terminal device 130 shown in FIG. 1 , and the device 202 may be as shown in FIG. Figure 1 A network device 110 or TRP 120 is shown.

[0040] In this case, if Figure 2 As shown, device 202 may determine 240 downlink control information (DCI) for scheduling PUSCH transmission and send it to device 201 ( Figure 2(not shown) DCI. Device 201 may determine 210 control information for scheduling a PUSCH based on the received DCI. In some embodiments, the control information may indicate a plurality of transmission control indication (TCI) states to be used for data communication on the PUSCH between device 201 and device 202. The TCI state may indicate a reference signal set and parameters for configuring a quasi-co-location (QCL) relationship between reference signals in the reference signal set and DMRS ports for the PUSCH. For example, different TCI states may be used for different TRPs. In some embodiments, device 201 may be configured with a plurality of PUSCH repetitions (also referred to as "transmission opportunities for the PUSCH") scheduled by the control information. As Figure 2 As shown, the device 201 may determine 220 a group of PUSCH repetitions associated with one of the multiple TCI states from the multiple PUSCH repetitions. The device 201 may further determine 230 a corresponding resource allocation for sending the group of PUSCH repetitions to the device 202. For example, the resource allocation for one PUSCH repetition may indicate resources (e.g., time resources and / or frequency resources) for transmitting one or more DMRS and / or data of the PUSCH.

[0041] In some embodiments, the device 202 may also be configured with multiple PUSCH repetitions (also referred to as "PUSCH reception opportunities"). Figure 2 As shown, the device 202 may determine 250 a group of PUSCH repetitions associated with one of the multiple TCI states from the multiple PUSCH repetitions (e.g., in the same manner as the device 201). The device 202 may also determine 260 for the group of PUSCH repetitions a corresponding resource allocation for receiving the group of PUSCH repetitions from the device 201 (e.g., in the same manner as the device 201). Then, as Figure 2 As shown, device 201 may send 270 the set of PUSCH repetitions to device 202 based on the determined resource allocation and the TCI state associated with the set of PUSCH repetitions. Likewise, device 202 may receive 270 the set of PUSCH repetitions from device 201 based on the determined resource allocation and the TCI state.

[0042] Optionally, in some embodiments, in PDSCH communication, the device 201 may be as follows: Figure 1 The network device 110 or TRP 120 shown, while the device 202 can be as Figure 1 The terminal device 130 is shown.

[0043] In this case, if Figure 2As shown, device 201 can determine 210 DCI for scheduling PDSCH transmission and send the DCI to device 202. Device 202 can determine 240 control information for scheduling PDSCH based on the received DCI. In some embodiments, the control information can indicate multiple TCI states to be used for data communication on PDSCH between device 201 and device 202. The TCI state can indicate a reference signal set and parameters for configuring a quasi-co-positioning relationship between a reference signal within the reference signal set and a DMRS port of the PDSCH. For example, different TCI states can be used for different TRPs. In some embodiments, device 201 can be configured with multiple PDSCH repetitions (also referred to as "PDSCH transmission opportunities") scheduled by the control information. As shown Figure 2 As shown, the device 201 may determine 220 a group of PDSCH repetitions associated with one TCI state among the multiple TCI states from the multiple PDSCH repetitions. The device 201 may further determine 230 corresponding resource allocations for sending the group of PDSCH repetitions to the device 202. For example, the resource allocation for one PDSCH repetition may indicate corresponding resources (e.g., time resources and / or frequency resources) for sending one or more DMRS and / or data of the PDSCH.

[0044] In some embodiments, the device 202 may also be configured with multiple PDSCH repetitions (also referred to as "PDSCH reception opportunities"). Figure 2 As shown, device 202 may determine 250 a set of PDSCH repetitions associated with one of the multiple TCI states from the multiple PDSCH repetitions (e.g., in the same manner as device 201). Device 202 may also determine 260 for the set of PDSCH repetitions a corresponding resource allocation for receiving the set of PDSCH repetitions from device 201 (e.g., in the same manner as device 201). Then, as Figure 2 As shown, device 201 may send 270 the set of PDSCH repetitions to device 202 based on the determined resource allocation and the TCI state associated with the set of PDSCH repetitions. Likewise, device 202 may receive 270 the set of PDSCH repetitions from device 201 based on the determined resource allocation and the TCI state.

[0045] 3 to 4. Fig. 9C Describe more details about resource allocation for PDSCH or PUSCH repetition. In the following, some embodiments of the present disclosure will be described with reference to PDSCH. It should be understood that this is only for illustrative purposes and does not impose any limitation on the scope of the present disclosure. The embodiments of the present disclosure may also be applicable to PUSCH.

[0046] In some embodiments, for each repetition of a physical shared channel (e.g., PUSCH or PDSCH), resource allocation may be determined based on at least one of the following: the number of additional DMRS configured for the physical shared channel; the slot format; the number of repetitions; the respective lengths of the repetitions (e.g., the number of symbols occupied by each repetition); the maximum length in a repetition (e.g., the maximum number of symbols occupied by one repetition in a repetition); the resource mapping type of the physical shared channel (e.g., PDSCH mapping type A or PDSCH mapping type B as specified in 3GPP specification Release 15); the DMRS configuration type (e.g., DMRS type 1 or DMRS type 2 as specified in 3GPP specification Release 15); multiple DMRS without data The CDM (code domain multiplexing) group (as specified in Release 15 of the 3GPP specification), the starting position or symbol index of the DMRS (as specified in the higher layer parameter dmrs-TypeA-Position specified in Release 15 of the 3GPP specification), and one or more DMRS position parameters associated with the resource mapping type (as specified in Release 15 of the 3GPP specification for PDSCH mapping type A or PDSCH mapping type B dmrs-AdditionalPosition).

[0047] In some embodiments, N TCI states (where N is an integer and 1≤N≤4), a total of R repetitions (where R is an integer and 2≤R≤32) of a physical shared channel (e.g., PUSCH or PDSCH), and a total of L for one repetition may be configured at a device (e.g., device 201 or 202). j Symbols (where L j is an integer and 1≤L j ≤14, and j is an integer and 1≤j≤R). For example, one of the N TCI states may be associated with k repetitions selected from a total of R repetitions (where k≥1). In some embodiments, the total number of L for one repetition may be j A symbol may include a data symbol and / or a DMRS symbol. In some embodiments, for k repetitions associated with the same TCI state, there may be no transmit / receive opportunity associated with another TCI state between two adjacent repetitions in the k repetitions. In some embodiments, the k repetitions associated with the same TCI state may be continuous in a sub-slot or symbol. Optionally, in some embodiments, the k repetitions associated with the same TCI state may be discontinuous in a symbol. In some embodiments, N may be one of {1, 2, 4}.

[0048] In some embodiments, R can be equal to 2. In this case, the number N of TCI states can be 2. For each TCI state, there can be only one repetition. For example, the total number of symbols in the first repetition (also referred to as "symbol length" or "length of the first repetition") can be L1 (where L1 is an integer and 1 ≤ L1 ≤ 14), the number of DMRS symbols in the first repetition can be M1 (where M1 is an integer and 1 ≤ M1 ≤ 4), and the total number of symbols for the second repetition can be L2 (where L2 is an integer and 1 ≤ L2 ≤ 14), and the number of DMRS symbols for the second repetition can be M2 (where M2 is an integer and 1 ≤ M2 ≤ 4). In some embodiments, the value of L1 can be different from the value of L2. In some embodiments, the value of M1 can be different from the value of M2. In some embodiments, the position of the first DMRS in the first repetition and the position of the first DMRS in the second repetition can be different. In some embodiments, the position of the first DMRS in the first repetition can be the first symbol among all L1 symbols. In some embodiments, the position of the second DMRS in the second repetition can not be the first symbol among all L2 symbols. For example, the position of the second DMRS in the second repetition can be the second symbol among all L2 symbols.

[0049] In some embodiments, R can be an integer and 2 < R ≤ 32. For example, R can be one of {3, 4, 5, 6, 7, 8, 10, 12, 14, 16}. In some embodiments, the symbol length L of each repetition j can be the same. In some embodiments, the corresponding symbol lengths L j and L g (where j is an integer and 1 ≤ j ≤ R, g is an integer and 1 ≤ g ≤ R, and g ≠ j) of at least two different repetitions can be different. In some embodiments, the maximum symbol length among the R repetitions can be L (where L is an integer and 1 ≤ L ≤ 14). In some embodiments, L can be one of {1, 2, 3, 4, 5, 6, 7}. In some embodiments, the number M of DMRS symbols in each repetition j can be the same. In some embodiments, the numbers M j and M g of DMRS symbols for at least two different repetitions (where j is an integer and 1 ≤ j ≤ R, g is an integer and 1 ≤ g ≤ R, and g ≠ j) can be different. In some embodiments, the maximum number of DMRS symbols among the R repetitions can be M (where M is an integer and 1 ≤ M ≤ 4). In some embodiments, M can be 1 or 2.

[0050] In some embodiments, for different values of R and / or N, the total number of symbols in different repetitions, the number of DMRS symbols, and / or the positions of DMRS symbols may be different. In some embodiments, if R = 2 and / or N = 2, the total number of symbols in different repetitions, the number of DMRS symbols, and / or the positions of DMRS symbols may be the same; and if R is an integer and 2 < R ≤ 32, the total number of symbols in at least two different repetitions, the number of DMRS symbols, and / or the positions of DMRS symbols may be different.

[0051] In some cases, the number of configured TCI states N ≥ 2, the total number of configured repetitions R > 2, and there is at least one DMRS symbol in one repetition. In this case, in some embodiments, there may be no data frequency-division multiplexed with DMRS in the symbols for DMRS mapping. In some embodiments, if the DMRS type is configured as DMRS type 1, the number of DMRS CDM groups without data may be fixed at 2. In some embodiments, if the DMRS type is configured as DMRS type 2, the number of DMRS CDM groups without data is fixed at 3. In some embodiments, the number of symbols for the preamble DMRS may be limited to 1. In some embodiments, the maximum total number of symbols occupied by one repetition may be at least 2.

[0052] In some embodiments, R may be equal to 2. In this case, the number of TCI states N may be 2. For each TCI state, there may be only one repetition. For example, the total number of symbols in the first repetition (also referred to as "symbol length" or "length of the first repetition") may be L1 (where L1 is an integer and 1 ≤ L1 ≤ 14), the number of DMRS symbols in the first repetition may be M1 (where M1 is an integer and 1 ≤ M1 ≤ 4), and the total number of symbols in the second repetition may be L2 (where L2 is an integer and 1 ≤ L2 ≤ 14), and the number of DMRS symbols in the second repetition may be M2 (where M2 is an integer and 1 ≤ M2 ≤ 4). In some embodiments, the value of L1 may be different from the value of L2. In some embodiments, the value of M1 may be different from the value of M2. In some embodiments, the position of the first DMRS in the first repetition and the position of the first DMRS in the second repetition may be different. In some embodiments, the position of the first DMRS in the first repetition may be the first symbol among all L1 symbols. In some embodiments, the position of the second DMRS in the second repetition may not be the first symbol among all L2 symbols. For example, the position of the second DMRS in the second repetition may be the second symbol among all L2 symbols.

[0053] Figure 3A and Figure 3B FIG. shows an example diagram of resource allocation according to some embodiments of the present disclosure. Figure 3A and Figure 3B Each shows k repetitions 310 associated with the same TCI state i ,310 i+1 ...310 i+k-1 , where k ≥ 1. Figure 3A and Figure 3B In the example, the total number of symbols occupied by k repetitions is L i , L i+1 ...L i+k-1 .L i , L i+1 ...L i+k-1 Each of may be an integer and is in the range of [1, L]. In some embodiments, the symbols occupied by a repeat may be indexed by relative values ​​within the repeat. For example, the symbols occupied by repeat 310 i The occupied symbols can be represented by (1, 2, ... L i ) to index; by repeating 310 i+1 The occupied symbols can be represented by (1, 2, ... L i+1 ) to index; ... and by repeating 310 i+k-1 The occupied symbols can be represented by (1, 2, ... L i+k-1 ) to index. The number of k repeated DMRS symbols can be M i , M i+1 ...M i+k-1 In each of the k repetitions, the number of DMRS symbols may be 0, 1, or 2. That is, in each of the k repetitions, the maximum number of DMRS symbols may be M, where M may be 1 or 2. In some embodiments, for one of the k repetitions, for example Figure 3A Repeat 310 shown i , the position of the first DMRS in the repetition may not be the first symbol in the repetition. Optionally, in some embodiments, for one of the k repetitions, for example Figure 3B Repeat 310 shown i , the position of the first DMRS in the repetition can be the first symbol in the repetition.

[0054] In some embodiments, there may be k repetitions associated with the same TCI state. In some embodiments, the corresponding symbol lengths L of at least two different repetitions are j and L g (where j is an integer and 1≤j≤k, g is an integer and 1≤g≤k, and g≠j) may be different. In some embodiments, the number M of at least two different repeated DMRS symbols is j and M g(where j is an integer and 1≤j≤k, g is an integer and 1≤g≤k, and g≠j) may be different. In some embodiments, at least for two different repetitions among the k repetitions, the position of the DMRS symbol within one repetition may be at least partially different from the position of the DMRS symbol within another repetition.

[0055] In some embodiments, if the configured number of TCI states N≥2 and / or the configured total number of repetitions R>2, there may be k repetitions associated with the same TCI state. In some embodiments, if the symbol length of each repetition is W, W may be 1 or 2. In some embodiments, if there is a DMRS mapped for one repetition, the DMRS may be frequency-division multiplexed with the data within the W symbols. In some embodiments, for at least one of the k repetitions, no DMRS may be mapped to the W symbols of the repetition. Optionally, no DMRS may be frequency-division multiplexed with the data within the W symbols of the repetition. In some embodiments, the transmit power of the data in the W symbols without DMRS frequency-division multiplexing with the data may exceed the transmit power of the data in the W symbols with DMRS frequency-division multiplexing with the data. In some embodiments, for the first repetition of the k repetitions, there may be a DMRS mapped within the W symbols. Optionally, there may be a DMRS frequency-division multiplexed with the data. For at least one of the remaining k-1 repetitions, there may be no DMRS mapped within the W symbols. Optionally, there may be no DMRS frequency-division multiplexed with the data.

[0056] In some embodiments, if the DMRS type is configured as DMRS type 1, the number of DMRS ports indicated for PDSCH / PUSCH transmission may be less than 4. For example, the number of DMRS ports indicated for PDSCH / PUSCH transmission may be limited to 1. In some embodiments, if the DMRS type is configured as DMRS type 1, the DMRS port indicated for PDSCH / PUSCH transmission may be one of the following ports: {port 0}, {port 1}, {port 0 and port 1}, {port 4}, {port 5}, {port 4 and port 5}, {port 0, port 1 and port 4} or {port 0, port 1, port 4 and port 5}. In some embodiments, if the DMRS type is configured as DMRS type 1, the DMRS ports indicated for PDSCH / PUSCH transmission may be mapped to resource elements (hereinafter referred to as "REs") with even indexes. For example, in a physical resource block (hereinafter referred to as "PRB") scheduled for PDSCH / PUSCH, the RE index for DMRS mapping may include {0, 2, 4, 6, 8, 10}. In some embodiments, if the DMRS type is configured as DMRS type 1, the indicated DMRS port for PDSCH / PUSCH transmission may be mapped to an RE with an even index in the frequency domain (also referred to as "even RE"). In some embodiments, if there is a DMRS mapped for one repetition, the DMRS may be frequency-division multiplexed with data within W symbols. For example, the DMRS may be mapped to an even RE, and the data may be mapped to an odd RE (i.e., an RE with an odd index). In some embodiments, for at least one of the k repetitions, no DMRS may be mapped within the repeated W symbols. Optionally, no DMRS may be frequency-division multiplexed with data within the repeated W symbols. For example, in such a repetition, data may be mapped to an odd RE, and the even RE is left blank for the terminal device. For another example, in this repetition, data may be mapped to even REs, and odd REs may be left blank for the terminal device. In some embodiments, for at least one of the k repetitions, no DMRS may be mapped within W symbols, and there may be two repetitions within W symbols. For example, the data of one repetition may be mapped to odd REs in W symbols, and the data of another repetition may be mapped to even REs in W symbols. In some embodiments, for the first repetition, the fourth repetition, the sixth repetition, the seventh repetition, and / or the eighth repetition in the k repetitions, there may be a DMRS mapped within W symbols. Optionally, there may be a DMRS that is frequency-division multiplexed with data. For example, DMRS may be mapped to even REs, and data may be mapped to odd REs.In some embodiments, for the nth repetition and the (n+1)th repetition among the k repetitions, no DMRS may be mapped within the W symbols. In some embodiments, the nth repetition and the (n+1)th repetition may be mapped to the same W symbols. For example, the data of the nth repetition may be mapped to an even RE, and the data of the (n+1)th repetition may be mapped to an odd RE. For another example, the data of the nth repetition may be mapped to an odd RE, and the data of the (n+1)th repetition may be mapped to an even RE. In some embodiments, n is an integer, and n may be one of {2, 4, 5, 6, 7}.

[0057] In some embodiments, if the DMRS type is configured as DMRS type 2, the number of DMRS ports indicated for PDSCH / PUSCH transmission may be less than 2 or less than 4. For example, the number of DMRS ports indicated for PDSCH / PUSCH transmission may be limited to 1. In some embodiments, if the DMRS type is configured as DMRS type 2, the DMRS port indicated for PDSCH / PUSCH transmission may be one of the following ports: {port 0}, {port 1}, {port 0 and port 1}, {port 6}, {port 7}, {port 0 and port 6}, {port 1 and port 7}, {port 6 and port 7}, {port 0, port 1 and port 6}, or {port 0, port 1, port 6, and port 7}. In some embodiments, if the DMRS type is configured as DMRS type 2, the indicated DMRS port for PDSCH / PUSCH transmission may be mapped to REs indexed with {0, 1, 6, 7} in the frequency domain within one of the PRBs scheduled for PDSCH / PUSCH. In some embodiments, if there is a DMRS mapping for one repetition, the DMRS may be frequency-division multiplexed with data within W symbols. For example, within one of the PRBs scheduled for PDSCH / PUSCH, the DMRS may be mapped to REs indexed with {0, 1, 6, 7} in the frequency domain, and the data may be mapped to REs indexed with {2, 3, 4, 5, 8, 9, 10, 11} in the frequency domain. In some embodiments, for at least one of the k repetitions, no DMRS may be mapped within the repeated W symbols. Optionally, no DMRS may be frequency-division multiplexed with data within the repeated W symbols. For example, within one of the PRBs scheduled for PDSCH / PUSCH, data may be mapped to REs indexed by {2, 3, 4, 5, 8, 9, 10, 11} in the frequency domain, and REs indexed by {0, 1, 6, 7} in the frequency domain may be left blank for the terminal device. For another example, within one of the PRBs scheduled for PDSCH / PUSCH, data may be mapped to REs indexed by {0, 1, 2, 3, 6, 7, 8, 9} in the frequency domain, and REs indexed by {4, 5, 10, 11} in the frequency domain may be left blank for the terminal device. In some embodiments, for the mth repetition among the k repetitions, there may be a DMRS mapped in W symbols. Optionally, there may be DMRS frequency division multiplexing with data. For example, in one of the PRBs scheduled for PDSCH / PUSCH, the DMRS may be mapped to REs indexed with {0, 1, 6, 7} in the frequency domain, and the data may be mapped to REs indexed with {2, 3, 4, 5, 8, 9, 10, 11} in the frequency domain. In some embodiments, m is an integer and may be one of {1, 2, 3, 4, 5, 6, 7, 8}.In some embodiments, for the nth repetition and the (n+1)th repetition among the k repetitions, no DMRS may be mapped within the W symbols. In some embodiments, the nth repetition and the (n+1)th repetition may be mapped to the same W symbols. For example, in one of the PRBs scheduled for PDSCH / PUSCH, the data of the nth repetition may be mapped to the REs indexed with {2, 3, 4, 5, 8, 9, 10, 11} in the frequency domain, and the data of the (n+1)th repetition may be mapped to the REs indexed with {0, 1, 6, 7} in the frequency domain. For example, in one of the PRBs scheduled for PDSCH / PUSCH, the data of the nth repetition may be mapped to the REs indexed with {0, 1, 2, 3, 6, 7, 8, 9} in the frequency domain, and the data of the (n+1)th repetition may be mapped to the REs indexed with {4, 5, 10, 11} in the frequency domain. In some embodiments, n is an integer, and n may be one of {2, 3, 4, 5, 6, 7, 8}. In some embodiments, the f-th repetition of the k repetitions may be mapped to different W symbol pairs. For example, if W=1, a portion of the data of the f-th repetition may be mapped to REs indexed with {0, 1, 6, 7} in the frequency domain of symbol A within one of the PRBs scheduled for PDSCH / PUSCH, and the remainder of the data of the f-th repetition may be mapped to REs indexed with {4, 5, 10, 11} in the frequency domain of symbol B. In some embodiments, A and B are both integers, where 2≤A≤14 and 2≤B≤14, and where A≠B. For another example, if W=2, then within one of the PRBs scheduled for PDSCH / PUSCH, a portion of the data for the f-th repetition may be mapped to REs indexed with {0, 1, 6, 7} in the frequency domain of symbol A and symbol A+1, and the remaining portion of the data for the f-th repetition may be mapped to REs indexed with {4, 5, 10, 11} in the frequency domain of symbol B and symbol B+1. In some embodiments, f is an integer, and f may be one of {2, 3, 4, 5, 6, 7, 8}. In some embodiments, A and B are both integers, where 2≤A≤13 and 2≤B≤13, and where A≠B.

[0058] In some embodiments, if the DMRS type is configured as DMRS type 2, the number of DMRS ports indicated for PDSCH / PUSCH transmission may be less than 4 or less than 8. In some embodiments, if the DMRS type is configured as DMRS type 2, the number of DMRS ports indicated for PDSCH / PUSCH transmission may be one of the following ports: {port 0}, {port 1}, {port 2}, {port 3}, {port 0 and port 1}, {port 2 and port 3}, {port 0 and port 2}, {port 0, port 1, port 2, and port 3}, {port 6}, {port 7}, {port 6 and port 7}, {port 8}, {port 9}, {port 8 and port 9}. In some embodiments, if the DMRS type is configured as DMRS type 2, the indicated DMRS port for PDSCH / PUSCH transmission may be mapped to an RE indexed with {0, 1, 4, 5, 6, 7, 8, 9} in the frequency domain within one of the PRBs scheduled for PDSCH / PUSCH. In some embodiments, if there is a DMRS mapping for one repetition, the DMRS may be frequency-division multiplexed with data within W symbols. For example, in one PRB scheduled for PDSCH / PUSCH, DMRS may be mapped to REs indexed with {0, 1, 2, 3, 6, 7, 8, 9} in the frequency domain, and data may be mapped to REs indexed with {4, 5, 10, 11} in the frequency domain. In some embodiments, for at least one of the k repetitions, no DMRS may be mapped within the repeated W symbols. Optionally, no DMRS may be frequency-division multiplexed with data within the repeated W symbols. For example, in one DMRS scheduled for PDSCH / PUSCH, data may be mapped to REs indexed with {4, 5, 10, 11} in the frequency domain, and REs indexed with {0, 1, 2, 3, 6, 7, 8, 9} in the frequency domain may be left blank for the terminal device. For another example, within one of the PRBs scheduled for PDSCH / PUSCH, data may be mapped to REs indexed with {0, 1, 6, 7} in the frequency domain, and REs indexed with {2, 3, 4, 5, 8, 9, 10, 11} in the frequency domain may be left blank for the terminal device.In some embodiments, for the mth repetition in k repetitions, there may be a DMRS mapped in W symbols. Optionally, there may be DMRS and data frequency division multiplexing. For example, in one of the PRBs scheduled for PDSCH / PUSCH, the DMRS may be mapped to REs indexed with {0, 1, 2, 3, 6, 7, 8, 9} in the frequency domain, and the data may be mapped to REs indexed with {4, 5, 10, 11} in the frequency domain. In some embodiments, m is an integer, and m may be one of {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, for the ath repetition, the bth repetition, and the cth repetition in k repetitions, there may be no DMRS mapped in W symbols. In some embodiments, the ath repetition, the bth repetition, and the cth repetition may be mapped to the same W symbols. For example, within one of the PRBs scheduled for PDSCH / PUSCH, the ath repeated data may be mapped to REs indexed with {0, 1, 6, 7} in the frequency domain, the bth repeated data may be mapped to REs indexed with {2, 3, 8, 9} in the frequency domain, and the cth repeated data may be mapped to REs indexed with {4, 5, 10, 11} in the frequency domain. In some embodiments, a, b, and c are each integers, where a may be one of {2, 3, 4, 5, 6, 7, 8}, b may be one of {2, 3, 4, 5, 6, 7, 8}, c may be one of {2, 3, 4, 5, 6, 7, 8}, and where a≠b≠c.

[0059] In some embodiments, there may be k repetitions associated with the same TCI state. For the first repetition of the k repetitions, the symbol length of the repetition may be L, and the number of DMRS symbols in the repetition may be M. For at least one of the remaining k-1 repetitions, the symbol length of the repetition may not exceed L and / or the number of DMRS symbols in the repetition may not exceed M. In some embodiments, M=1. In this case, for the first repetition of the k repetitions, the first symbol in the repetition (e.g., its symbol index is 1) may be used for DMRS. In some embodiments, for at least one of the remaining k-1 repetitions, there may be no symbol for DMRS. That is, DMRS transmission / reception may be disabled in the repetition. Optionally, or additionally, for at least one of the remaining k-1 repetitions, there may be a symbol for DMRS, and the position of the DMRS symbol may not be the first symbol in the repetition. For example, the symbol index of the DMRS symbol is X, where X is an integer and 2≤X≤L. Optionally, in some embodiments, M=2. In this case, for the first repetition of the k repetitions, there may be two DMRS symbols, wherein the two DMRS symbols may include the first symbol in the repetition (e.g., whose symbol index is 1) and another symbol in the repetition (e.g., whose symbol index is X, where X is an integer and 2≤X≤L). In some embodiments, for at least one of the remaining k-1 repetitions, there may be no DMRS symbol. That is, DMRS transmission / reception may be disabled in the repetition. Optionally, or additionally, for at least one of the remaining k-1 repetitions, there may be a symbol for DMRS, and the position of the DMRS symbol may be the first symbol in the repetition. Optionally, or additionally, for at least one of the remaining k-1 repetitions, there may be a symbol for DMRS, and the position of the DMRS symbol may be X, where X is an integer and 2≤X≤L in the repetition. Optionally, or additionally, for at least one of the remaining k-1 repetitions, there may be two DMRS symbols, and at least one of the positions of the two DMRS symbols in the repetition may be different from the position of the DMRS symbol in the first repetition of the k repetitions. Alternatively, or additionally, for at least one of the remaining k-1 repetitions, two symbols may be used for DMRS, and the position of the first DMRS symbol in the repetition may be the first symbol in the repetition. Alternatively, or additionally, for at least one of the remaining k-1 repetitions, two symbols may be used for DMRS, and the position of the first DMRS symbol in the repetition may be the second symbol in the repetition.Alternatively, or additionally, for at least one of the remaining k-1 repetitions, there may be two symbols for DMRS, and the position of the second DMRS symbol in the repetition may be Y, where Y is an integer and 2≤Y≤L in the repetition, and where Y≠X.

[0060] In some embodiments, there may be k repetitions associated with the same TCI state. For the first of the k repetitions, the symbol length of the repetition may be L, and the number of DMRS symbols in the repetition may be m. Of the remaining k-1 repetitions, there may be at least one repetition with a symbol length lower than L and / or a number of DMRS symbols lower than m. That is, at least one symbol of the DMRS in at least one repetition may be omitted compared to the first of the k repetitions.

[0061] In some embodiments, if two adjacent repetitions (e.g., they may be continuous or discontinuous in symbols) are associated with two different TCI states, the number of DMRS symbols in the latter repetition may be M (i.e., the maximum number of DMRS symbols in a repetition), and the symbol index of the first DMRS symbol of the DMRS symbol in the latter repetition may be 2 (i.e., not the first symbol in the latter repetition). This is because the first symbol in the latter repetition may be affected by beam switching and / or automatic gain control (AGC) adjustment.

[0062] In some embodiments, the network device may indicate the configuration of a redundancy version (hereinafter referred to as "RV") to the terminal device. In some embodiments, there may be an RV indication field (hereinafter referred to as "RV") in the configuration. id ”), which may indicate the RV sequence to be applied to the PDSCH / PUSCH repetition. In some embodiments, there may be an RV id In some embodiments, for RV id For different values ​​of and / or different sequences of RV, the repetition order may be different. id The first set of values ​​selected from the T available values ​​of the RV and / or the first set of sequences selected from the T available sequences of the RV, the repetitions associated with the same TCI state may be transmitted adjacently. In addition, the repetitions associated with the first TCI state may be sent first, and any repetition associated with the second TCI state may be sent after the repetition associated with the first TCI state. For example, for k repetitions associated with the same TCI state, there may be no transmission / reception opportunities associated with another TCI state between two adjacent repetitions in the k repetitions. In some embodiments, there may be a transmission / reception opportunity associated with another TCI state between two adjacent repetitions from the RV. idIn some embodiments, each of the second set of values ​​may be different from any of the first set of values. In some embodiments, each of the second set of RV sequences may be different from any of the first set of RV sequences. In some embodiments, for each of the RV sequences id The repetitions associated with different TCI states may be transmitted adjacently, for example, for any pair of two adjacent repetitions, the two repetitions are associated with two different TCI states.

[0063] In some embodiments, the sequence of RVs may be one of the following: {0 2 3 1}, {2 3 1 0}, {3 1 0 2}, {1 0 2 3}, {0 2}, {2 3}, {3 1}, or {1 0}. Optionally, any four adjacent RVs in the RV sequence may be {0 2 3 1}, {2 3 1 0}, {3 1 0 2}, or {1 0 2 3}. Optionally, any two adjacent RVs in the RV sequence may be {0 2}, {2 3}, {3 1}, or {1 0}. In some embodiments, in this case, if the number of TCI states configured for one repetition is 2 (for example, hereinafter represented as TCI-A and TCI-B), and if the total number of repetitions is 4, the order of the associated TCI states of the four repetitions may be {TCI-A, TCI-A, TCI-B, TCI-B}. In some embodiments, if the number of configured TCI states for one repetition is 2 (e.g., hereinafter represented as TCI-A and TCI-B), and if the total number of repetitions is 8, the order of the associated TCI states of the 8 repetitions may be {TCI-A, TCI-A, TCI-A, TCI-A, TCI-B, TCI-B, TCI-B, TCI-B}. In some embodiments, if the number of configured TCI states for repetition is 4 (e.g., hereinafter represented as TCI-A, TCI-B, TCI-C, and TCI-D), and if the total number of repetitions is 8, the order of the associated TCI states of the 8 repetitions may be {TCI-A, TCI-A, TCI-B, TCI-B, TCI-C, TCI-C, TCI-D, TCI-D}.

[0064] In some embodiments, the sequence of RVs may be one of the following: {0 3 2 1}, {3 2 1 0}, {2 1 0 3}, {1 0 3 2}, {0 3}, {2 1}, {3 2}, {1 0}, {3 0}, and {1 2}. Optionally, any four adjacent RVs in the RV sequence are {0 3 2 1}, {3 2 1 0}, {2 1 0 3}, or {1 0 3 2}. Optionally, any two adjacent RVs in the RV sequence are {0 3}, {2 1}, {3 2}, {1 0}, or {3 0}, or {1 2}. In some embodiments, in this case, if the number of configured TCI states for repetition is 2 (e.g., hereinafter represented as TCI-A and TCI-B), and if the total number of repetitions is 4, the order of the associated TCI states of the four repetitions may be {TCI-A, TCI-B, TCI-A, TCI-B}. In some embodiments, if the number of configured TCI states for repetition is 2 (e.g., hereinafter represented as TCI-A and TCI-B), and if the total number of repetitions is 8, the order of the associated TCI states of the 8 repetitions may be {TCI-A, TCI-B, TCI-A, TCI-B, TCI-A, TCI-B}. In some embodiments, if the number of configured TCI states for repetitions is 4 (e.g., represented as TCI-A, TCI-B, TCI-C, and TCI-D hereinafter), and if the total number of repetitions is 8, the order of the associated TCI states of the 8 repetitions can be {TCI-A, TCI-B, TCI-C, TCI-D, TCI-A, TCI-B, TCI-C, TCI-D}.

[0065] Figure 4A An example diagram of resource allocation in a traditional solution is shown. Figure 4A In FIG. 4 , there are two TCI states (ie, TCI-A and TCI-B) and a total of four repetitions 410-1, 410-2, 410-3, and 410-4 (collectively or individually referred to as repetitions 410). That is, N=2, R=4. Figure 4A As shown, repetitions 410-1 and 410-2 are associated with TCI-A, and repetitions 410-3 and 410-4 are associated with TCI-B. Each repetition 410 may include 2 symbols, one for DMRS and one for data. That is, according to the conventional scheme, at least 8 symbols are required in this case. According to an embodiment of the present disclosure, the DMRS symbols in repetitions 410-2 and 410-4 may be omitted. Figure 4B An example diagram of resource allocation according to an embodiment of the present disclosure is shown. Figure 4BAs shown, the DMRS symbols in repetitions 410 - 2 and 410 - 4 are omitted to achieve better resource utilization.

[0066] In some embodiments, if the number of configured TCI states is N (e.g., N=1, 2, 3, or 4), the number of repetitions for one TCI state among the N TCI states is k, and the length or maximum length of one repetition is L, then the number of pre-pended DMRS symbols may be H (e.g., H may be 1 or 2).

[0067] In some embodiments, if k=2 and L=2, for the first repetition, the total number of symbols may be 2, the number of DMRS symbols may be 1, and the DMRS may be mapped to the first or second symbol of the 2 symbols. In some embodiments, for the second repetition, the total number of symbols may be 1 or 2, and the number of DMRS symbols may be 0. That is, there may be no DMRS mapping in the second repetition. In some embodiments, for the second repetition, the total number of symbols may be 2, the number of DMRS symbols may be 1, and the DMRS may be mapped to the second symbol of the 2 symbols.

[0068] In some embodiments, if k=3 and L=2, for the first repetition and / or the third repetition, the total number of symbols in one repetition may be 2, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the 2 symbols in the repetition. In some embodiments, for the second repetition and / or the third repetition, the total number of symbols in one repetition may be 1 or 2, and the number of DMRS symbols in the repetition may be 0. That is, there may be no DMRS mapping in the second repetition and / or the third repetition. In some embodiments, for the third repetition, the total number of symbols may be 2, the number of DMRS symbols may be 1, and the DMRS may be mapped to the second symbol of the 2 symbols.

[0069] In some embodiments, if k=4 and L=2, for the first repetition and / or the fourth repetition, the total number of symbols in one repetition may be 2, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the 2 symbols in the repetition. In some embodiments, for the second repetition and / or the third repetition, the total number of symbols in one repetition may be 1 or 2, and the number of DMRS symbols in the repetition may be 0. That is, no DMRS may be mapped in the second repetition and / or the third repetition. In some embodiments, for the second repetition, the third repetition, and / or the fourth repetition, the total number of symbols in one repetition may be 2, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the second symbol of the 2 symbols in the repetition.

[0070] In some embodiments, if k=2 and L=3, for the first repetition, the total number of symbols may be 3, the number of DMRS symbols may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the L symbols. In some embodiments, for the second repetition, the total number of symbols may be 2 or 3, and the number of DMRS symbols may be 0. That is, no DMRS may be mapped in the second repetition. In some embodiments, for the second repetition, the total number of symbols may be 3, the number of DMRS symbols may be 1, and the DMRS may be mapped to the second symbol or the third symbol of the L symbols.

[0071] In some embodiments, if k=2 and L=4, for the first repetition, the total number of symbols may be 4, the number of DMRS symbols may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the L symbols. In some embodiments, for the second repetition, the total number of symbols may be 3 or 4, and the number of DMRS symbols may be 0. That is, no DMRS may be mapped in the second repetition. In some embodiments, for the second repetition, the total number of symbols may be 4, the number of DMRS symbols may be 1, and the DMRS may be mapped to the third symbol or the fourth symbol of the L symbols.

[0072] In some embodiments, if k=2 and L=5, for the first repetition, the total number of symbols may be 5, the number of DMRS symbols may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the L symbols. In some embodiments, for the second repetition, the total number of symbols may be 4 or 5, and the number of DMRS symbols may be 0. That is, no DMRS may be mapped in the second repetition. In some embodiments, for the second repetition, the total number of symbols may be 5, the number of DMRS symbols may be 1, and the DMRS may be mapped to the third symbol, the fourth symbol, or the fifth symbol of the L symbols.

[0073] In some embodiments, if k=2 and L=6, for the first repetition, the total number of symbols may be 6, the number of DMRS symbols may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the L symbols. In some embodiments, for the second repetition, the total number of symbols may be 5 or 6, and the number of DMRS symbols may be 0. That is, no DMRS may be mapped in the second repetition. In some embodiments, for the second repetition, the total number of symbols may be 6, the number of DMRS symbols may be 1, and the DMRS may be mapped to the fourth symbol or the fifth symbol of the L symbols.

[0074] In some embodiments, if k=2 and L=7, for the first repetition, the total number of symbols may be 7, the number of DMRS symbols may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the L symbols. In some embodiments, for the second repetition, the total number of symbols may be 6 or 7, and the number of DMRS symbols may be 0. That is, no DMRS may be mapped in the second repetition. In some embodiments, for the second repetition, the total number of symbols may be 7, the number of DMRS symbols may be 1, and the DMRS may be mapped to the fourth symbol, the fifth symbol, the sixth symbol, or the seventh symbol of the L symbols.

[0075] In some embodiments, if k=4 and L=3, for the first repetition and / or the fourth repetition, the total number of symbols in one repetition may be 3, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the 3 symbols in the repetition. In some embodiments, for the second repetition, the third repetition, and / or the fourth repetition, the total number of symbols in one repetition may be 2 or 3, and the number of DMRS symbols in the repetition may be 0. That is, no DMRS may be mapped in the second repetition and / or the third repetition. In some embodiments, for the second repetition, the third repetition, and / or the fourth repetition, the total number of symbols in one repetition may be 3, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the second symbol of the 3 symbols in the repetition.

[0076] In some embodiments, if k=3 and L=3, for the first repetition and / or the third repetition, the total number of symbols in one repetition may be 3, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the 3 symbols in the repetition. In some embodiments, for the second repetition and / or the third repetition, the total number of symbols in one repetition may be 2 or 3, and the number of DMRS symbols in the repetition may be 0. That is, no DMRS may be mapped in the second repetition and / or the third repetition. In some embodiments, for the second repetition and / or the third repetition, the total number of symbols in one repetition may be 3, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the second symbol of the 3 symbols in the repetition.

[0077] In some embodiments, if k=3 and L=4, for the first repetition and / or the third repetition, the total number of symbols in one repetition may be 4, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the first symbol or the second symbol of the 4 symbols in the repetition. In some embodiments, for the second repetition and / or the third repetition, the total number of symbols in one repetition may be 3 or 4, and the number of DMRS symbols in the repetition may be 0. That is, no DMRS may be mapped in the second repetition and / or the third repetition. In some embodiments, for the second repetition and / or the third repetition, the total number of symbols in one repetition may be 4, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the second symbol of the 4 symbols in the repetition.

[0078] In some embodiments, if k=2 and L=3, and if 2 or 3 additional DMRSs are configured or the value of the parameter dmrs-AdditionalPosition is 'pos2' or 'pos3', then for the first repetition and the second repetition, the number of symbols in each repetition can be 3, the number of DMRS symbols in the repetition can be 1, and the DMRS can be mapped to the first symbol of the 3 symbols in the repetition.

[0079] In some embodiments, if k=2 and L=3, and if 2 additional DMRSs are configured, or the value of the parameter dmrs-AdditionalPosition is 'pos2', for the first repetition, the number of symbols may be 4, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first and fourth symbols of the 4 symbols. Alternatively, or additionally, for the second repetition, the number of symbols may be 3, the number of DMRS symbols may be 1, and the DMRS may be mapped to the third symbol of the 3 symbols. In some embodiments, for the second repetition, the number of symbols may be 4, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first and fourth symbols of the 4 symbols. Alternatively, or additionally, for the first repetition, the number of symbols may be 3, the number of DMRS symbols may be 1, and the DMRS may be mapped to the first symbol of the 3 symbols.

[0080] In some embodiments, if k=2 and L=4, and if 2 additional DMRS are configured, or the value of the parameter dmrs-AdditionalPosition is 'pos2', then for the first repetition, the number of symbols may be 5, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first and fifth symbols of the 5 symbols. Alternatively, or additionally, for the second repetition, the number of symbols may be 4, the number of DMRS symbols may be 1, and the DMRS may be mapped to the fourth symbol of the 4 symbols. In some embodiments, for the second repetition, the number of symbols may be 5, the number of DMRS symbol mappings may be 2, and the DMRS may be mapped to the first and fifth symbols of the 5 symbols. Alternatively, or additionally, for the first repetition, the number of symbols may be 4, the number of DMRS symbols may be 1, and the DMRS may be mapped to the first symbol of the 4 symbols.

[0081] In some embodiments, if k=2 and L=4, and if 3 additional DMRS are configured or the value of the parameter dmrs-AdditionalPosition is 'pos3', for the first repetition, the number of symbols may be 5, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first and fourth symbols of the 5 symbols. Optionally, or additionally, for the second repetition, the number of symbols may be 4, the number of DMRS symbols may be 1, and the DMRS may be mapped to the second symbol of the 4 symbols. In some embodiments, for the first repetition, the number of symbols may be 4, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first and fourth symbols of the 4 symbols. Optionally, or additionally, for the second repetition, the number of symbols may be 4, the number of DMRS symbols may be 1, and the DMRS may be mapped to the third symbol of the 4 symbols.

[0082] In some embodiments, if k=2 and L=5, and if 3 additional DMRSs are configured, or the value of the parameter dmrs-AdditionalPosition is 'pos3', for the first repetition, the number of symbols may be 5, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first symbol and the fourth symbol of the 5 symbols. Alternatively, or additionally, for the second repetition, the number of symbols may be 5, the number of DMRS symbols may be 2, and the DMRS may be mapped to the second symbol and the fifth symbol of the 5 symbols.

[0083] In some embodiments, if k=2 and L=5, and if 2 additional DMRS are configured, or the value of the parameter dmrs-AdditionalPosition is 'pos2', for the first repetition, the number of symbols may be 5, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first and fifth symbols of the 5 symbols. Alternatively, or additionally, for the second repetition, the number of symbols may be 5, the number of DMRS symbols may be 1, and the DMRS may be mapped to the fourth symbol of the 5 symbols. In some embodiments, for the first repetition, the number of symbols may be 6, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first and fifth symbols of the 6 symbols. Alternatively, or additionally, for the second repetition, the number of symbols may be 5, the number of DMRS symbols may be 1, and the DMRS may be mapped to the third symbol of the 5 symbols.

[0084] In some embodiments, if k=2 and L=6, and if 3 additional DMRSs are configured or the value of the parameter dmrs-AdditionalPosition is 'pos3', then for the first repetition and the second repetition, the number of symbols in one repetition can be 6, the number of DMRS symbols in the repetition can be 2, and the DMRS can be mapped to the first symbol and the fourth symbol of the 6 symbols in the repetition.

[0085] In some embodiments, if k=2 and L=6, and if 2 additional DMRS are configured, or the value of the parameter dmrs-AdditionalPosition is 'pos2', for the first repetition, the number of symbols may be 6, the number of DMRS symbols may be 2, and the DMRS may be mapped to the first symbol and the sixth symbol of the 6 symbols. Alternatively, or additionally, for the second repetition, the number of symbols may be 6, the number of DMRS symbols may be 1, and the DMRS may be mapped to the fourth symbol of the 6 symbols.

[0086] In some embodiments, if k=4 and L=3, and if 2 additional DMRSs are configured, or the value of the parameter dmrs-AdditionalPosition is 'pos2', then for the first repetition and / or the fourth repetition, the number of symbols in one repetition may be 3, the number of DMRS symbols in the repetition may be 1, and the DMRS may be mapped to the first symbol of the 3 symbols in the repetition. Alternatively, or additionally, for the second repetition, the number of symbols may be 3, the number of DMRS symbols may be 1, and the DMRS may be mapped to the second symbol of the 3 symbols. Alternatively, or additionally, for the third repetition and / or the fourth repetition, the number of symbols in one repetition may be 2, and the number of DMRS symbols in the repetition may be 0. Alternatively, or additionally, for the third repetition, the number of symbols may be 3, the number of DMRS symbols may be 1, and the DMRS may be mapped to the third symbol of the 3 symbols.

[0087] In some embodiments, the available values ​​of the number of repetitions k associated with a TCI state and the available values ​​of the length or maximum length of a repetition L may be dependent on each other. In some embodiments, the number of available values ​​and / or the available values ​​of L may be different for different values ​​of k. In some embodiments, the number of available values ​​and / or the available values ​​of k may be different for different values ​​of L. For example, if k=2, the available values ​​of L may include at least one of 2, 3, 4, 5, 6, and 7. For another example, if k=3, the available values ​​of L may include at least one of 2, 3, and 4. For another example, if k=4, the available values ​​of L may include at least one of 2 and 3. For another example, if L=2, the available values ​​of k may include at least one of 2, 3, and 4. For another example, if L=3, the available values ​​of k may include at least one of 2, 3, and 4. For another example, if L=4, the available values ​​of k may include at least one of 2 and 3.

[0088] FIG. 5A to FIG. 5B An example diagram of resource allocation according to some embodiments of the present disclosure is shown. FIG. 5A to FIG. 5B In FIG. 5 , it is assumed that there are two TCI states (ie, TCI-A and TCI-B) and a total of 8 repetitions 510-1, 510-2, 510-3, and 510-4 (collectively or individually referred to as repetitions 510). Each repetition 510 includes at most 2 symbols. That is, N=2, R=8, and L=2. Figure 5AAs shown, in some embodiments, repetitions 510-1 and 510-3 associated with TCI-A each include one DMRS symbol, while the DMRS symbols in repetitions 510-2 and 510-4 are omitted. Repetitions 510-5 and 510-7 associated with TCI-B each include one DMRS symbol, while the DMRS symbols in repetitions 510-6 and 510-8 are omitted. Optionally, as Figure 5B As shown, the repetition 510-1 associated with TCI-A includes one DMRS symbol, while the DMRS symbols in repetitions 510-2, 510-3, and 510-4 are omitted. The repetition 510-5 associated with TCI-B includes one DMRS symbol, while the DMRS symbols in repetitions 510-6, 510-7, and 510-8 are omitted. In this way, 8 PDSCH or PUSCH repetitions can be implemented in one time slot.

[0089] In some embodiments, as described above, resource allocations for different repetitions may be different. For example, in different repetitions, DMRS symbols may be present in different positions. Figure 6 An example diagram of resource allocation according to some embodiments of the present disclosure is shown. Figure 6 In FIG. 1 , it is assumed that there are two TCI states (ie, TCI-A and TCI-B) and a total of 4 repetitions 610-1, 610-2, 610-3, and 610-4 (collectively or individually referred to as repetitions 610). Each repetition 610 includes at most 3 symbols. That is, N=2, R=4, and L=3. Figure 6 As shown, repetitions 610-1 and 610-2 are associated with TCI-A. However, the position of the DMRS symbol in repetition 610-1 is different from the position of the DMRS symbol in repetition 610-2. Similarly, repetitions 610-3 and 610-4 are associated with TCI-B. However, the position of the DMRS symbol in repetition 610-3 is different from the position of the DMRS symbol in repetition 610-4.

[0090] In some embodiments, the number of DMRS symbols and / or their position in each repetition may depend on at least one of: the number of additional DMRS configured for a physical shared channel (e.g., PUSCH or PDSCH); the slot format; the number of repetitions; the symbol length of each repetition; the resource mapping type of the physical shared channel (such as PDSCH mapping type A or PDSCH mapping type B specified in Release 15 of the 3GPP specification); and one or more DMRS position parameters associated with the resource mapping type (e.g., dmrs-AdditionalPosition for PDSCH mapping type A or PDSCH mapping type B specified in Release 15 of the 3GPP specification). 7A to 7EAn example diagram of resource allocation according to some embodiments of the present disclosure is shown. 7A to 7E In FIG. 1 , it is assumed that there are two TCI states (ie, TCI-A and TCI-B) and a total of 8 repetitions 710-1, 710-2, ... 710-8 (collectively or individually referred to as repetitions 710). Each repetition 710 includes at most 2 symbols. That is, N=2, R=8, L=2.

[0091] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type B, and no additional DMRS is configured for PDSCH. Fig. 7A As shown, 4 repetitions can be associated with the same TCI state. The total number of DMRS and data symbols for the 4 repetitions can be 5. Taking TCI-A as an example, for repetition 710-1, there are 2 symbols, of which the first symbol is used for DMRS transmission / reception and the second symbol is used for data transmission / reception. For the remaining repetitions 710-2, 710-3, and 710-4, the DMRS symbol is omitted, and the symbol length of repetition 710-2, 710-3, or 710-4 is 1.

[0092] In some embodiments, for example, the physical shared channel is a PDSCH, the resource mapping type is a PDSCH mapping type B, and one or more additional DMRSs are configured for the PDSCH. Figure 7B As shown, 4 repetitions can be associated with the same TCI state. The total number of DMRS and data symbols for the 4 repetitions can be 6. Taking TCI-A as an example, for repetitions 710-1 and 710-4, there are 2 symbols in each repetition, where the first symbol is used for DMRS transmission / reception and the second symbol is used for data transmission / reception. For the remaining repetitions 710-2 and 710-3, the DMRS symbol is omitted, and the symbol length of repetition 710-2 or 710-3 is 1.

[0093] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, and no additional DMRS is configured for PDSCH. In this case, the repeated resource allocation can be Fig. 7A Same as shown.

[0094] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, one additional DMRS is configured for PDSCH, and the parameter dmrs-AdditionalPosition for PDSCH mapping type A is 2. In this case, in some embodiments, the resource allocation can be the same as Fig. 7AAlternatively, in some embodiments, the repeated resource allocation may be Figure 7C As shown in Figure 7C As shown, 4 repetitions can be associated with the same TCI state. The total number of symbols for DMRS and data for the 4 repetitions can be 6. Taking TCI-A as an example, for repetitions 710-1 and 710-4, there are 2 symbols in each repetition. The first symbol in repetition 710-1 and the second symbol in repetition 710-4 are used for DMRS transmission / reception, and the second symbol in repetition 710-1 and the first symbol in repetition 710-4 are used for data transmission / reception. For the remaining repetitions 710-2 and 710-3, the DMRS symbol is omitted, and the symbol length of repetition 710-2 or 710-3 is 1.

[0095] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, one additional DMRS is configured for PDSCH, and the parameter dmrs-AdditionalPosition for PDSCH mapping type A is 3. In this case, for example, the resource allocation for repetition can be the same as Figure 7B Same as shown.

[0096] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, two additional DMRS are configured for PDSCH, and the parameter dmrs-AdditionalPosition for PDSCH mapping type A is 2. In this case, for example, the resource allocation for repetition can be the same as Figure 7B Same as shown.

[0097] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, two additional DMRS are configured for PDSCH, and the parameter dmrs-AdditionalPosition of PDSCH mapping type A is 3. In this case, for example, the repeated resource allocation can be in Fig.7D or as shown in 7E.

[0098] In some embodiments, the number of DMRS symbols and / or their position in each repetition may depend on at least one of: the number of additional DMRS configured for a physical shared channel (e.g., PUSCH or PDSCH); the slot format; the number of repetitions; the symbol length of each repetition; the resource mapping type of the physical shared channel (such as PDSCH mapping type A or PDSCH mapping type B specified in Release 15 of the 3GPP specification); and one or more DMRS position parameters associated with the resource mapping type (e.g., dmrs-AdditionalPosition for PDSCH mapping type A or PDSCH mapping type B specified in Release 15 of the 3GPP specification). FIG. 8A to FIG. 8D An example diagram of resource allocation according to some embodiments of the present disclosure is shown. FIG. 8A to FIG. 8D In FIG. 8 , it is assumed that there are two TCI states (ie, TCI-A and TCI-B) and a total of 4 repetitions 810-1, 810-2, 810-3, and 810-4 (collectively or individually referred to as repetitions 810). Each repetition 810 includes at most 3 symbols. That is, N=2, R=4, and L=3.

[0099] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, and no additional DMRS is configured for PDSCH. Fig. 8A As shown, 2 repetitions can be associated with the same TCI state. The total number of DMRS and data symbols for 2 repetitions can be 5. Taking TCI-A as an example, for repetition 810-1, there are 3 symbols, of which the first symbol is used for DMRS transmission / reception and the remaining two symbols are used for data transmission / reception. For the remaining repetition 810-2, the DMRS symbol is omitted, and the symbol length of repetition 810-2 is 2.

[0100] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, one additional DMRS is configured for PDSCH, and the parameter dmrs-AdditionalPosition for PDSCH mapping type A is 2. In this case, in some embodiments, the resource allocation can be the same as Fig. 8A Alternatively, in some embodiments, the repeated resource allocation may be Figure 8B As shown in Figure 8BAs shown, 2 repetitions can be associated with the same TCI state. The total number of symbols for DMRS and data for the 2 repetitions can be 6. Taking repetitions 810-1 and 810-2 associated with TCI-A as an example, there are 3 symbols in each repetition, wherein the first symbol in repetition 810-1 and the last symbol in repetition 810-2 are used for DMRS transmission / reception, and the remaining symbols in repetitions 810-1 and 810-2 are used for data transmission / reception.

[0101] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, two additional DMRSs are configured for PDSCH, and the parameter dmrs-AdditionalPosition for PDSCH mapping type A is 2. In this case, Figure 8C As shown, 2 repetitions can be associated with the same TCI state. Taking repetitions 810-1 and 810-2 associated with TCI-A as an example, there are 3 symbols in each repetition, wherein the first symbol in repetition 810-1 and the second symbol in repetition 810-2 are used for DMRS transmission / reception, and the remaining symbols in repetitions 810-1 and 810-2 are used for data transmission / reception.

[0102] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, two additional DMRS are configured for PDSCH, and the parameter dmrs-AdditionalPosition of PDSCH mapping type A is 3. In this case, for example, the resource allocation for repetition can be the same as Fig. 8A or Figure 8B Same as shown.

[0103] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, and three additional DMRS are configured for PDSCH. Fig.8D As shown, 2 repetitions can be associated with the same TCI state. Taking repetitions 810-1 and 810-2 associated with TCI-A as an example, there are 3 symbols in each repetition, wherein the first symbol in repetition 810-1 and the first symbol in repetition 810-2 are used for DMRS transmission / reception, and the remaining symbols in repetitions 810-1 and 810-2 are used for data transmission / reception.

[0104] In some embodiments, the number of DMRS symbols and / or their position in each repetition may depend on at least one of: the number of additional DMRS configured for a physical shared channel (e.g., PUSCH or PDSCH); the slot format; the number of repetitions; the symbol length of each repetition; the resource mapping type of the physical shared channel (such as PDSCH mapping type A or PDSCH mapping type B specified in Release 15 of the 3GPP specification); and one or more DMRS position parameters associated with the resource mapping type (e.g., dmrs-AdditionalPosition for PDSCH mapping type A or PDSCH mapping type B specified in Release 15 of the 3GPP specification). 9A to 9C An example diagram of resource allocation according to some embodiments of the present disclosure is shown. 9A to 9C In FIG. 1 , it is assumed that there are two TCI states (ie, TCI-A and TCI-B) and a total of 4 repetitions 910-1, 910-2, 910-3, and 910-4 (collectively or individually referred to as repetitions 910). Each repetition 910 includes at most 4 symbols, that is, N=2, R=4, and L=4.

[0105] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, and no additional DMRS is configured for PDSCH. Fig.9A As shown, 2 repetitions can be associated with the same TCI state. The total number of DMRS and data symbols for 2 repetitions can be 7. Taking TCI-A as an example, for repetition 910-1, there are 4 symbols, of which the first symbol is used for DMRS transmission / reception and the remaining three symbols are used for data transmission / reception. For the remaining repetition 910-2, the DMRS symbol is omitted, and the symbol length of repetition 910-2 is 3.

[0106] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, one additional DMRS is configured for PDSCH, and the parameter dmrs-AdditionalPosition for PDSCH mapping type A is 2. In this case, Fig. 9B As shown, 2 repetitions can be associated with the same TCI state. The total number of symbols for DMRS and data for the 2 repetitions can be 8. Taking repetitions 910-1 and 910-2 associated with TCI-A as an example, there are 4 symbols in each repetition, wherein the first symbol in repetition 910-1 and the last symbol in repetition 910-2 are used for DMRS transmission / reception, and the remaining symbols in repetitions 910-1 and 910-2 are used for data transmission / reception.

[0107] In some embodiments, for example, the physical shared channel is PDSCH, the resource mapping type is PDSCH mapping type A, one additional DMRS is configured for PDSCH, and the parameter dmrs-AdditionalPosition for PDSCH mapping type A is 3. In this case, Fig. 9C As shown, 2 repetitions can be associated with the same TCI state. The total number of symbols for DMRS and data for the 2 repetitions can be 8. Taking repetitions 910-1 and 910-2 associated with TCI-A as an example, there are 4 symbols in each repetition, wherein the first symbol in repetition 910-1 and the third symbol in repetition 910-2 are used for DMRS transmission / reception, and the remaining symbols in repetitions 910-1 and 910-2 are used for data transmission / reception.

[0108] In some embodiments, for the nth repetition and the (n+1)th repetition among R repetitions, if the associated TCI states of the two repetitions are different, the DMRS of the (n+1)th repetition can be mapped to the second symbol or the third symbol within the repetition.

[0109] In view of the above, it can be seen that the embodiments of the present disclosure provide a solution for DMRS transmission and reception in multi-TRP communications. The solution disables DMRS transmission and reception in at least one PDSCH or PUSCH repetition. In addition, the solution allows different resource modes to be used in different repetitions. Therefore, this solution can achieve better resource utilization. In addition, the solution can also achieve backward compatibility for scheduling of PDSCH or PUSCH repetitions in multi-TRP communications, thereby achieving high performance.

[0110] Fig.10 An example method 1000 according to some embodiments of the present disclosure is shown. In some embodiments, for example, the method 1000 may be performed in Figure 2 The method 1000 is performed at the device 201 shown. It should be understood that the method 1000 may include additional blocks not shown and / or may omit some of the blocks shown, and the scope of the present disclosure is not limited in this regard.

[0111] At block 1010, the device 201 determines control information for scheduling a physical shared channel. The control information indicates a plurality of TCI states for communicating with the device 202 on the physical shared channel.

[0112] At block 1020, a plurality of transmission opportunities of the physical shared channel are configured to be scheduled by the control information, and the device 201 determines a group of transmission opportunities associated with one of the plurality of TCI states from the plurality of transmission opportunities.

[0113] In some embodiments, the device 201 may determine the set of transmission opportunities associated with the TCI state such that the set of transmission opportunities are consecutive in a sub-slot or symbol.

[0114] In some embodiments, the device 201 may determine the group of transmission opportunities associated with the TCI state such that no transmission opportunity associated with another TCI state in the plurality of TCI states is available between two adjacent transmission opportunities in the group of transmission opportunities.

[0115] At block 1030 , the device 201 determines, for the set of transmission opportunities, corresponding resource allocations for transmitting at least the one DMRS of the physical shared channel to the device 202 .

[0116] In some embodiments, the device 201 can determine the resource allocation for the group of transmission opportunities based on at least one of the following: the number of additional DMRS configured for the physical shared channel; the time slot format; the number of the multiple transmission opportunities; the number of symbols occupied by one of the multiple transmission opportunities; the resource mapping type of the physical shared channel; and one or more DMRS location parameters associated with the resource mapping type.

[0117] In some embodiments, the device 201 may determine, for a transmission opportunity in the group of transmission opportunities, a resource allocation for DMRS transmission in the transmission opportunity. The resource allocation for the transmission opportunity may indicate at least one of the following: the number of symbols used for DMRS transmission in the transmission opportunity; and the corresponding position of the symbol in the time slot.

[0118] In some embodiments, the group of transmission opportunities includes at least a first transmission opportunity and a second transmission opportunity. Device 201 may determine a first resource allocation for DMRS transmission in the first transmission opportunity, and determine a second resource allocation for DMRS transmission in the second transmission opportunity, wherein the second resource allocation is different from the first resource allocation.

[0119] In some embodiments, the device 201 may determine resource allocation for the set of transmission opportunities such that DMRS transmission is disabled in at least one transmission opportunity in the set of transmission opportunities.

[0120] At block 1040, device 201 transmits the at least one DMRS to device 202 during the set of transmission opportunities based on the resource allocation and the TCI state.

[0121] In some embodiments, device 201 is a terminal device, device 202 is a network device serving the terminal device or a TRP coupled to the network device, and the physical shared channel is a PUSCH.

[0122] In some embodiments, device 201 is a network device or a TRP coupled to the network device, device 202 is a terminal device served by the network device, and the physical shared channel is a PDSCH.

[0123] Fig.11 An example method 1100 according to some embodiments of the present disclosure is shown. In some embodiments, for example, the method 1100 may be performed in Figure 2 The method 1100 is performed at the device 202 shown. It should be understood that the method 1100 may include additional blocks not shown and / or may omit some of the blocks shown, and the scope of the present disclosure is not limited in this regard.

[0124] At block 1110, device 202 determines control information for scheduling a physical shared channel. The control information indicates a plurality of TCI states for communicating with device 201 on the physical shared channel.

[0125] At block 1120 , in response to a plurality of reception opportunities of the physical shared channel being configured to be scheduled by the control information, the device 202 determines a set of reception opportunities associated with one of the plurality of TCI states from the plurality of reception opportunities.

[0126] In some embodiments, the device 202 may determine the set of reception opportunities associated with the TCI state such that the set of reception opportunities are consecutive in a sub-slot or symbol.

[0127] In some embodiments, the device 202 may determine the set of reception opportunities associated with the TCI state such that no reception opportunities associated with another TCI state in the plurality of TCI states are available between two adjacent reception opportunities in the set of reception opportunities.

[0128] At block 1130 , the device 202 determines corresponding resource allocations for receiving at least one DMRS of the physical shared channel from the device 201 for the set of reception opportunities.

[0129] In some embodiments, the device 202 can determine the resource allocation for the group of reception opportunities based on at least one of the following: the number of additional DMRS configured for the physical shared channel; the time slot format; the number of the multiple reception opportunities; the number of symbols occupied by one of the multiple reception opportunities; the resource mapping type of the physical shared channel; and one or more DMRS location parameters associated with the resource mapping type.

[0130] In some embodiments, the device 202 may determine, for a reception opportunity in the set of reception opportunities, a resource allocation for DMRS reception in the reception opportunity. The resource allocation may indicate at least one of the following: the number of symbols used for DMRS reception in the reception opportunity; and the corresponding position of the symbol in the time slot.

[0131] In some embodiments, the plurality of reception opportunities may include at least a first reception opportunity and a second reception opportunity. Device 202 may determine a first resource allocation for DMRS reception in the first reception opportunity, and determine a second resource allocation for DMRS reception in the second reception opportunity, wherein the first resource allocation is different from the second resource allocation.

[0132] In some embodiments, the device 202 may determine resource allocation for the set of reception opportunities such that DMRS reception is disabled in at least one reception opportunity in the set of reception opportunities.

[0133] At block 1140, the device 202 receives the at least one DMRS from the device 201 during the set of reception opportunities based on the resource allocation and the TCI state.

[0134] In some embodiments, device 202 is a network device or a TRP coupled to the network device, the first device 201 is a terminal device served by the network device, and the physical shared channel is a PUSCH.

[0135] In some embodiments, device 202 is a terminal device, device 201 is a network device serving the terminal device or a TRP coupled to the network device, and the physical shared channel is a PDSCH.

[0136] Fig.12 1 is a simplified block diagram of a device 1200 suitable for implementing an embodiment of the present disclosure. The device 1200 can be considered as Figure 1 A further example implementation of the network device 110, TRP 120, or terminal device 130 is shown. Thus, the device 1200 may be implemented at the network device 110, TRP 120, or terminal device 130, or as at least a part of the network device 110, TRP 120, or terminal device 130.

[0137] As shown in the figure, the device 1200 includes: a processor 1210; a memory 1220 coupled to the processor 1210; a suitable transmitter (TX) and receiver (RX) 1240 coupled to the processor 1210; and a communication interface coupled to TX / RX 1240 / . The memory 1210 stores at least a portion of the program 1230. TX / RX 1240 is used for bidirectional communication. TX / RX1240 has at least one antenna to facilitate communication, but in fact the access node mentioned in this application may have several antennas. The communication interface may represent any interface required for communication with other network elements, such as an X2 interface for bidirectional communication between eNBs, an S1 interface for communication between a mobility management entity (MME) / serving gateway (S-GW) and an eNB, a Un interface for communication between an eNB and a relay node (RN), or a Uu interface for communication between an eNB and a terminal device.

[0138] Assume that program 1230 includes program instructions that, when executed by associated processor 1210, enable device 1200 to perform the functions described herein. Figures 1 to 11 The embodiments of the present disclosure discussed herein may be operated. The embodiments herein may be implemented by computer software executable by a processor 1210 of the device 1200, or by hardware, or by a combination of software and hardware. The processor 1210 may be configured to implement various embodiments of the present disclosure. In addition, the combination of the processor 1210 and the memory 1220 may form a processing component 1250 suitable for implementing various embodiments of the present disclosure.

[0139] The memory 1220 may be of any type suitable for the local technology network and may be implemented using any suitable data storage technology (e.g., as non-limiting examples, non-transitory computer-readable storage media, semiconductor-based storage devices, magnetic storage devices and systems, optical storage devices and systems, fixed memory, and removable memory). Although only one memory 1220 is shown in the device 1200, there may be multiple physically distinct memory modules in the device 1200. As non-limiting examples, the processor 1210 may be of any type suitable for the local technology network and may include one or more of the following: a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. The device 1200 may have multiple processors, such as a dedicated integrated circuit chip that is time-slave to a clock of a synchronized master processor.

[0140] In general, various embodiments of the present disclosure may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present disclosure are shown and described as block diagrams, flow charts, or using some other graphical representations, it will be understood that the boxes, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general hardware or controllers or other computing devices, or some combination thereof, as non-limiting examples.

[0141] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer executable instructions such as those included in a program module that are executed in a device on a target real processor or a target virtual processor to perform the above-referenced Figure 6 7. In general, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The functions of program modules can be combined or separated between program modules as needed in various embodiments. The machine executable instructions of program modules can be executed in a local device or in a distributed device. In a distributed device, program modules can be located in both a local storage medium and a remote storage medium.

[0142] The program code for executing the disclosed method can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing device so that the program code can be implemented in the flow chart and / or the function / operation specified in the block diagram when the processor or controller executes it. The program code can be executed completely on the machine, can also be executed partially on the machine, can also be executed as an independent software package, can also be executed partially on the machine and partially on a remote machine, or can also be executed completely on a remote machine or server.

[0143] The above program code may be implemented on a machine-readable medium, which may be any tangible medium containing or storing a program used by or in conjunction with an instruction execution system, device or apparatus. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared or semiconductor system, apparatus or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media would include an electrical connection with one or more wires, a portable computer floppy disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0144] In addition, although operations are described in a particular order, this should not be understood as requiring the execution of these operations in the particular order shown or the execution of these operations in order, or requiring the execution of all operations shown to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these details should not be interpreted as limitations on the scope of the present disclosure, but should be interpreted as descriptions of features peculiar to a particular embodiment. Certain features described in the context of a separate embodiment may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0145] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it should be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Instead, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A method performed by a terminal device, comprising: receiving downlink control information for scheduling a physical shared channel, the downlink control information indicating a first transmission configuration indication TCI state and a second TCI state, Wherein, when a first transmission timing and a second transmission timing for repeated transmission in the physical shared channel are configured, the first TCI state is associated with the first transmission timing, the second TCI state is associated with the second TCI state, and the first transmission timing and the second transmission timing are continuous in symbols, wherein there is no demodulation reference signal DMRS at one position in at least one of the first transmission timing and the second transmission timing for repeated transmission.

2. A method performed by a network device, comprising: Transmitting downlink control information for scheduling a physical shared channel, the downlink control information indicating a first transmission configuration indication TCI state and a second TCI state; as well as A first transmission timing and a second transmission timing for repeated transmission in the physical shared channel are transmitted, wherein the first TCI state is associated with the first transmission timing, the second TCI state is associated with the second TCI state, and the first transmission timing and the second transmission timing are continuous in symbols, wherein there is no demodulation reference signal DMRS at a position in at least one of the first transmission timing and the second transmission timing for repeated transmission.

3. A terminal device comprising a processor, The processor is configured to: receiving downlink control information for scheduling a physical shared channel, the downlink control information indicating a first transmission configuration indication TCI state and a second TCI state; in, In a case where a first transmission timing and a second transmission timing for repeated transmission in the physical shared channel are configured, the first TCI state is associated with the first transmission timing, the second TCI state is associated with the second TCI state, and the first transmission timing and the second transmission timing are continuous in symbols, wherein there is no demodulation reference signal DMRS at one position in at least one of the first transmission timing and the second transmission timing for repeated transmission.

4. A network device comprising a processor, The processor is configured to: Transmitting downlink control information for scheduling a physical shared channel, the downlink control information indicating a first transmission configuration indication TCI state and a second TCI state; and A first transmission timing and a second transmission timing for repeated transmission in the physical shared channel are transmitted, wherein the first TCI state is associated with the first transmission timing, the second TCI state is associated with the second TCI state, and the first transmission timing and the second transmission timing are continuous in symbols, wherein there is no demodulation reference signal DMRS at a position in at least one of the first transmission timing and the second transmission timing for repeated transmission.

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