CN117322069A

CN117322069A - Communication method, device and storage medium based on multiple sending and receiving points

Info

Publication number: CN117322069A
Application number: CN202280001383.7A
Authority: CN
Inventors: 张振宇; 李明菊
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-12-29
Also published as: WO2023206538A1

Abstract

The disclosure relates to a communication method, a device and a storage medium based on multiple sending and receiving points. The communication method based on the multiple sending and receiving points is applied to the terminal, and comprises the following steps: determining at least two transmission reception points TRP serving the terminal; timing advance information corresponding to each of the at least two TRPs is acquired. The method and the device enable the terminal to communicate based on the TA information of each TRP in at least two TRPs for providing services for the terminal, enable each TRP in the at least two TRPs to realize uplink and downlink time alignment, relieve uplink and downlink intersymbol interference and reduce system performance loss.

Description

Communication method, device and storage medium based on multiple sending and receiving points

Technical Field

The disclosure relates to the technical field of communication, and in particular relates to a communication method, a device and a storage medium based on multiple transmission and reception points.

Background

With the development of communication technology, communication systems have evolved into multiple transmit and receive point (Multiple Transmission Reception Point, M-TRP) systems for multiple input multiple output (Multiple Input Multiple Output, MIMO). At the MIMO M-TRP, a network device (e.g., a base station) may use multiple TRPs to provide services to a terminal.

In the MIMO M-TRP system, a plurality of TRPs are transmitted by one Timing Advance (TA), i.e., TA adjustment is performed according to one TRP. However, in an M-TRP system, for communication between different cells (inter-cells) or within a cell (intra-cells), typically different TRPs are in different geographical areas, and the distances between the terminal and the different TRPs are different, thus having different transmission delays. Therefore, in the manner of performing TA adjustment according to one TRP, uplink and downlink time synchronization can be achieved at the TRP according to which TA adjustment is performed, but uplink and downlink time synchronization cannot be achieved at other TRPs, which may cause uplink and downlink intersymbol interference (Inter-symbol Interference, ISI) and further cause system performance loss.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a communication method, apparatus, and storage medium based on multiple transmission and reception points.

According to a first aspect of embodiments of the present disclosure, there is provided a communication method based on multiple transmission receiving points, applied to a terminal, the method including:

determining at least two transmission reception points TRP serving the terminal; timing advance information corresponding to each of the at least two TRPs is acquired.

In one embodiment, the at least two TRPs comprise TRPs between different cells.

In one embodiment, the at least two TRPs comprise TRPs within the same cell.

In one embodiment, the at least two TRPs include a first TRP and a second TRP;

the determining at least two TRPs serving the terminal, comprising:

determining that a first synchronization signal block of a control resource set 0 exists in the beam direction, and taking a TRP corresponding to the first synchronization signal block as a first TRP; and determining that a second synchronous signal block of the control resource set 0 does not exist in the beam direction, and taking the TRP corresponding to the second synchronous signal block as a second TRP.

In one embodiment, the determining that the second synchronization signal block of the control resource set 0 does not exist in the beam direction includes:

and acquiring a synchronization signal block set indicated by the network equipment, and determining that a second synchronization signal block of the control resource set 0 does not exist in the beam direction in the synchronization signal block set.

In one embodiment, the method further comprises: transmitting a first random access preamble based on the first TRP at a first random access occasion, wherein the first random access occasion and the first random access preamble correspond to the first synchronization signal block; and at a second random access occasion, transmitting a second random access preamble based on the second TRP, wherein the second random access occasion and the second random access preamble correspond to the second synchronous signal block.

In one embodiment, the second random access occasion is determined based on indication information sent by the network device or based on a predefined rule.

In one embodiment, the acquiring timing advance information corresponding to each of the at least two TRPs comprises:

receiving a random access response sent by the network equipment based on each TRP in the at least two TRPs, wherein the random access response comprises initial timing advance information; based on the initial timing advance information, timing advance information corresponding to each of the at least two TRPs is determined.

In one embodiment, the determining the timing advance information corresponding to each of the at least two TRPs based on the initial timing advance information includes:

receiving media access control-control unit (MAC-CE) information, wherein the MAC-CE information is used for indicating updated timing advance information; based on the updated timing advance information and the initial timing advance information, timing advance information corresponding to each of the at least two TRPs is determined.

According to a second aspect of the embodiments of the present disclosure, there is provided a communication method based on multiple transmission receiving points, applied to a network device, the method including:

Determining at least two transmission reception points TRP serving the terminal; transmitting timing advance information corresponding to each of the at least two TRPs.

In one embodiment, the at least two TRPs comprise TRPs between different cells.

In one embodiment, the at least two TRPs comprise TRPs within the same cell.

In one embodiment, the at least two TRPs include a first TRP and a second TRP;

the determining at least two TRPs serving the terminal, comprising:

and sending a synchronizing signal block set, and taking a synchronizing signal block which does not exist in the control resource set 0 in the wave beam direction in the synchronizing signal block set as a second synchronizing signal block.

In one embodiment, the method further comprises:

Receiving a first random access preamble based on the first TRP at a first random access occasion, wherein the first random access occasion and the first random access preamble correspond to the first synchronization signal block; and receiving a second random access preamble based on the second TRP at a second random access occasion, wherein the second random access occasion and the second random access preamble correspond to the second synchronous signal block.

In one embodiment, the transmitting timing advance information corresponding to each of the at least two TRPs includes:

transmitting a random access response based on each of the at least two TRPs, the random access response including initial timing advance information; timing advance information corresponding to each of the at least two TRPs is determined based on the initial timing advance information.

In one embodiment, the method further comprises: transmitting media access control-control unit (MAC-CE) information for indicating updated timing advance information; timing advance information for each of the at least two TRPs is determined based on the updated timing advance information and the initial timing advance information.

According to a third aspect of the embodiments of the present disclosure, there is provided a communication apparatus based on multiple transmission and reception points, including:

a processing unit configured to determine at least two transmission-reception points TRP serving the terminal; an acquisition unit configured to acquire timing advance information corresponding to each of the at least two TRPs.

In one embodiment, the at least two TRPs comprise TRPs between different cells.

In one embodiment, the at least two TRPs comprise TRPs within the same cell.

In one embodiment, the at least two TRPs include a first TRP and a second TRP; the processing unit is configured to determine at least two TRPs serving the terminal in the following manner:

In one embodiment, the obtaining unit is configured to obtain a set of synchronization signal blocks indicated by the network device, and the processing unit is configured to determine that there is no second synchronization signal block of the control resource set 0 in the beam direction in the set of synchronization signal blocks.

In an embodiment, the communication device based on multiple transmission and reception points further comprises a transmitting unit configured to: transmitting a first random access preamble based on the first TRP at a first random access occasion, wherein the first random access occasion and the first random access preamble correspond to the first synchronization signal block; and at a second random access occasion, transmitting a second random access preamble based on the second TRP, wherein the second random access occasion and the second random access preamble correspond to the second synchronous signal block.

In one embodiment, the acquiring unit is configured to receive a random access response sent by the network device based on each of the at least two TRPs, where the random access response includes initial timing advance information; the processing unit is configured to determine timing advance information corresponding to each of the at least two TRPs based on the initial timing advance information.

In one embodiment, the acquisition unit is configured to receive media access control-control unit, MAC-CE, information indicating updated timing advance information; the processing unit is configured to determine timing advance information corresponding to each of the at least two TRPs based on the updated timing advance information and the initial timing advance information.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a communication apparatus based on multiple transmission and reception points, including:

a processing unit configured to determine at least two transmission-reception points TRP serving the terminal; a transmitting unit configured to transmit timing advance information corresponding to each of the at least two TRPs.

In one embodiment, the at least two TRPs comprise TRPs between different cells.

In one embodiment, the at least two TRPs comprise TRPs within the same cell.

In one embodiment, the at least two TRPs include a first TRP and a second TRP;

the processing unit is configured to determine at least two TRPs serving the terminal in the following manner:

In one embodiment, the sending unit is configured to send a set of synchronization signal blocks, and the processing unit is configured to take, as the second synchronization signal block, a synchronization signal block in which there is no control resource set 0 in the beam direction in the set of synchronization signal blocks.

In an embodiment, the multiple transmission reception point based communication apparatus further comprises a receiving unit configured to:

In one embodiment, the transmitting unit is configured to: transmitting a random access response based on each of the at least two TRPs, the random access response including initial timing advance information; timing advance information corresponding to each of the at least two TRPs is determined based on the initial timing advance information.

In one embodiment, the transmitting unit is further configured to: transmitting media access control-control unit (MAC-CE) information for indicating updated timing advance information; timing advance information for each of the at least two TRPs is determined based on the updated timing advance information and the initial timing advance information.

According to a fifth aspect of the embodiments of the present disclosure, there is provided a communication apparatus based on multiple transmission and reception points, including:

a processor; a memory for storing processor-executable instructions;

wherein the processor is configured to: the method of the first aspect or any implementation of the first aspect is performed.

According to a sixth aspect of the embodiments of the present disclosure, there is provided a communication apparatus based on multiple transmission and reception points, including:

a processor; a memory for storing processor-executable instructions;

wherein the processor is configured to: the method of the second aspect or any one of the embodiments of the second aspect is performed.

According to a seventh aspect of the disclosed embodiments, there is provided a storage medium having stored therein instructions which, when executed by a processor of a terminal, enable the terminal to perform the method of the first aspect or any one of the embodiments of the first aspect.

According to an eighth aspect of embodiments of the present disclosure, there is provided a storage medium having stored therein instructions which, when executed by a processor of a network device, enable the network device to perform the method of the second aspect or any one of the embodiments of the second aspect.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: by acquiring the TA information corresponding to each TRP in the at least two TRPs, the terminal can determine the TA information corresponding to each TRP in the at least two TRPs for providing service for the terminal, so that the terminal can communicate based on the TA information of each TRP in the at least two TRPs for providing service for the terminal, and each TRP in the at least two TRPs realizes uplink and downlink time alignment respectively, thereby relieving uplink and downlink intersymbol interference.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of a wireless communication system, according to an example embodiment.

Fig. 2 is a diagram illustrating transmission and reception of TRP uplink and downlink signals according to an exemplary embodiment.

Fig. 3 is a diagram illustrating transmission and reception of another TRP uplink and downlink signal according to an exemplary embodiment.

Fig. 4 is a flowchart illustrating a multi-TRP based communication method according to an exemplary embodiment.

Fig. 5 is a flowchart illustrating a multi-TRP based communication method according to an exemplary embodiment.

Fig. 6 is a signaling structure diagram illustrating a TAC indication field of an RAR indicating a TA according to an exemplary embodiment.

Fig. 7 is a flowchart illustrating a multi-TRP based communication method according to an exemplary embodiment.

Fig. 8 is a signaling structure diagram illustrating a TAC indication field of a MAC-CE indicating a TA according to an exemplary embodiment.

Fig. 9 is a flowchart illustrating a method of determining a TA of M-TRP in an intra-cell in a multi-TRP based communication method according to one exemplary embodiment.

Fig. 10 is a flowchart illustrating a method of determining a TA of M-TRP in an intra-cell in a multi-TRP based communication method according to one exemplary embodiment.

Fig. 11 is a flowchart illustrating a multi-TRP based communication method according to an exemplary embodiment.

Fig. 12 is a block diagram of a multi-TRP based communication device, according to an example embodiment.

Fig. 13 is a block diagram of a multi-TRP based communication device, according to an exemplary embodiment.

Fig. 14 is a block diagram illustrating a communication device for multi-TRP based communication according to an exemplary embodiment.

Fig. 15 is a block diagram illustrating a communication device for multi-TRP based communication according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure.

The communication method based on multiple transmission receiving points according to the present disclosure may be applied to the wireless communication system shown in fig. 1. The network system may include a network device 110 and a terminal 120. It will be appreciated that the wireless communication system shown in fig. 1 is only schematically illustrated, and that other network devices may be included in the wireless communication system, for example, a core network device, a wireless relay device, a wireless backhaul device, etc., which are not shown in fig. 1. The embodiments of the present disclosure do not limit the number of network devices and the number of terminals included in the wireless communication system.

It is further understood that the wireless communication system of the embodiments of the present disclosure is a network that provides wireless communication functionality. The wireless communication system may employ different communication techniques such as code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency-Division Multiple Access, OFDMA), single Carrier frequency division multiple access (SC-FDMA), carrier sense multiple access/collision avoidance (Carrier Sense Multiple Access with Collision Avoidance). Networks may be classified into 2G (english: generation) networks, 3G networks, 4G networks, or future evolution networks, such as a fifth Generation wireless communication system (The 5th Generation Wireless Communication System,5G) network, and 5G networks may also be referred to as New Radio (NR) networks, according to factors such as capacity, rate, delay, etc. of different networks. For convenience of description, the present disclosure will sometimes refer to a wireless communication network simply as a network.

Further, the network device 110 referred to in this disclosure may also be referred to as a radio access network device. The radio access network device may be: a base station, an evolved Node B (eNB), a home base station, an Access Point (AP) in a wireless fidelity (Wireless Fidelity, WIFI) system, a wireless relay Node, a wireless backhaul Node, or a transmission Point (Transmission Point, TP), etc., or may be a gNB in an NR system, or may also be a component or a part of a device that forms a base station, etc. In the case of a vehicle networking (V2X) communication system, the network device may also be an in-vehicle device. It should be understood that in the embodiments of the present disclosure, the specific technology and specific device configuration adopted by the network device are not limited.

Further, the Terminal 120 in the present disclosure may also be referred to as a Terminal device, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., and is a device for providing voice and/or data connectivity to a User, for example, the Terminal may be a handheld device, an in-vehicle device, etc. having a wireless connection function. Currently, some examples of terminals are: a smart Phone (Mobile Phone), a pocket computer (Pocket Personal Computer, PPC), a palm top computer, a personal digital assistant (Personal Digital Assistant, PDA), a notebook computer, a tablet computer, a wearable device, or a vehicle-mounted device, etc. In addition, in the case of a vehicle networking (V2X) communication system, the terminal device may also be an in-vehicle device. It should be understood that the embodiments of the present disclosure are not limited to the specific technology and specific device configuration adopted by the terminal.

In the disclosed embodiment, the network device 110 and the terminal 120 may employ any feasible wireless communication technology to implement mutual data transmission. The transmission channel corresponding to the network device 110 sending data to the terminal 120 is called a Downlink (DL) channel, and the transmission channel corresponding to the terminal 120 sending data to the network device 110 is called an Uplink (UL) channel. It is to be appreciated that the network devices involved in embodiments of the present disclosure may be base stations. Of course, the network device may be any other possible network device, and the terminal may be any possible terminal, which is not limited by the present disclosure.

It is understood that in the 5G scheme, one base station may include one or more TRPs. Each TRP may correspond to a different directional beam to facilitate communication by the corresponding terminal.

In the related art, in the MIMO M-TRP system in the 17 th published version of protocol (Release 17, R17), only one TA and one TA reference time are considered for two TRPs. It is assumed that the two TRPs are TRP1 and TRP2, respectively, and that the TA and TA reference times are aligned with only TRP1. Since two TRPs are typically different distances from the UE, the transmissions between the UE and the different TRPs have different delays. Thus, for a base station, the downlink signal and the uplink signal may be aligned in time at TRP1, while the failure of the downlink signal and the uplink signal to be aligned in time at TRP2 may cause interference ISI between the uplink and downlink symbols, which may further result in system performance loss.

When considering the single TA scheme, the system transmit receive times are shown in table 1 below.

Table 1 single TA transmission scheme schedule

	TRP#1	TRP#2
Distance to UE	D ₁	D ₂
TRP transmission time	T	T
Propagation delay	△t ₁ ＝D ₁ /c	△t ₂ ＝D ₂ /c
UE reception time	T+△t ₁	T+△t ₂
TA reference time	T+△t ₁	T+△t ₁
TA	T _TA,1 ＝2△t ₁	T _TA,1 ＝2△t ₁
UE transmit time	T+△t ₁ -T _TA,1	T+△t ₁ -T _TA,1
TRP reception time	T+2△t ₁ -T _TA,1	T+△t ₁ +△t ₂ -T _TA,1
TRP reception time offset	2△t ₁ -T _TA,1 ＝0	△t ₁ +△t ₂ -T _TA,1 ＝△t ₂ -△t ₁

Fig. 2 is a diagram illustrating transmission and reception of TRP uplink and downlink signals according to an exemplary embodiment. In fig. 2, two TRPs (TRP 1 and TRP 2) are illustrated using single TA information (one TA and one TA reference time). In FIG. 2, T ₁ Is the downlink signal transmission time, T ₂ Is the time when the UE receives the downlink signal from TRP1, T ₃ Is the time when the UE receives the downlink signal from TRP2, T ₄ Is the time when the UE transmits uplink signals to TRP1 and TRP2, T ₅ Is the time that TRP2 receives the uplink signal from the UE. If the time alignment of uplink and downlink signals is ensuredThe time of the uplink signal that TRP receives from UE should also be T1. As can be seen from fig. 2, when the single TA scheme is adopted, the time for TRP1 to receive the uplink signal from the UE is T1, and the uplink and downlink signals of TRP1 are time aligned. However, the time for TRP2 to receive the uplink signal from the UE is not T1, so that there is a time misalignment of TRP2 uplink and downlink signals.

In the standardization process of R17, for Multi-beam (Multi-beam), the scenarios of two TAs are discussed briefly in inter-cell M-TRP and physical downlink control channel/physical uplink shared channel (M-TRP PDCCH/PUCCH/PUSCH) among different Multi-TRP, but no conclusion is finally reached. In The third generation partnership project (The 3rd Generation Partnership Project,3GPP) 94 th radio access network (Radio Access Network, RAN) conference, a work item description of Rel-18MIMO evolution technology is given. Among them, consider that an M-TRP system based on multiple downlink control information (Multiple Downlink Control Information, M-DCI) uses two TAs for transmission.

Wherein, when the multi-TA transmission scheme is adopted, the system sending and receiving time is shown in the following table 2.

Table 2 multiple TA transmission scheme schedule

	TRP#1	TRP#2
Distance to UE	D ₁	D ₂
TRP transmission time	T	T
Propagation delay	△t ₁ ＝D ₁ /c	△t ₂ ＝D ₂ /c
UE reception time	T+△t ₁	T+△t ₂
TA reference time	T+△t ₁	T+△t ₂
TA	T _TA,1 ＝2△t ₁	T _TA,2 ＝2△t ₂
UE transmit time	T+△t ₁ -T _TA,1	T+△t ₂ -T _TA,2
TRP reception time	T+2△t ₁ -T _TA,1	T+2△t ₂ -T _TA,2
TRP reception time offset	2△t ₁ -T _TA,1 ＝0	2△t ₂ -T _TA,2 ＝0

Fig. 3 is a diagram illustrating transmission and reception of TRP uplink and downlink signals according to an exemplary embodiment. In fig. 3, two TRPs (TRP 1 and TRP 2) are illustrated using multi-TA information (2 TAs and 2 TA reference times). In FIG. 3, T ₁ Is the downlink signal transmission time, T ₂ Is the time when the UE receives the downlink signal from TRP1, T ₃ Is the time when the UE receives the downlink signal from TRP2, T ₄ Is the time when the UE transmits an uplink signal to TRP1, T ₅ Is the time when the UE transmits an uplink signal to TRP 2. As can be seen from fig. 3, the time for TRP1 to receive the uplink signal from the UE is T1, so that the uplink and downlink signals of TRP1 are time aligned. The time for TRP2 to receive the uplink signal from the UE is T1, so TRP2 uplink and downlink signals are time aligned. When the multi-TA scheme is adopted, since each TRP adopts a respective TA, the uplink and downlink signals of TRP1 are time aligned, and the uplink and downlink signals of TRP2 are time aligned.

In view of this, an embodiment of the present disclosure provides a multi-TRP-based communication method, in which a TA is configured for each TRP of a plurality of TRPs, so that each TRP of the plurality of TRPs adopts a respective TA to reduce system performance loss caused by time misalignment of uplink and downlink signals.

In one implementation, embodiments of the present disclosure are directed to a method of communication for multiple TRPs including at least two TRPs. Wherein any two TRPs of the plurality of TRPs may be different TRPs.

Fig. 4 is a flowchart illustrating a multi-TRP based communication method, which may be used in a terminal as shown in fig. 4, according to an exemplary embodiment, and may include the steps of:

in step S11, at least two TRPs serving the terminal are determined.

In some examples, any two of the at least two TRPs that serve the terminal in embodiments of the present disclosure may be different TRPs, e.g., any two different TRPs may be referred to as a first TRP and a second TRP.

In step S12, TA information corresponding to each of the at least two TRPs is acquired.

In the embodiment of the disclosure, each of at least two TRPs for providing services for a terminal corresponds to respective TA information.

The TA information related to the embodiments of the present disclosure may include a TA value, or may include a TA reference time, or may include a TA value and a TA reference time.

In the communication method based on multiple TRPs provided by the embodiment of the disclosure, the terminal acquires the TA information of each TRP in at least two TRPs serving the terminal, so that each TRP in the at least two TRPs corresponds to each TA information, and therefore, when the subsequent terminal performs communication based on multiple TRPs, each TRP in the multiple TRPs can be aligned based on each TA information, thereby realizing the alignment of uplink and downlink signal time and improving the system performance.

In the multi-TRP-based communication method provided in the embodiments of the present disclosure, each TRP of at least two TRPs serving a terminal includes TRPs of different inter-cells (inter-cells).

It is understood that the multi-TRP-based communication method provided by the embodiments of the present disclosure, where each TRP of the at least two TRPs includes an inter-cell TRP, may be understood as a multi-TA communication method in an inter-cell M-TRP system.

In the multi-TRP-based communication method provided in the embodiments of the present disclosure, each TRP of at least two TRPs serving a terminal includes a TRP in the same cell (intra-cell).

It is understood that the multi-TRP-based communication method provided by the embodiments of the present disclosure, where each TRP of the at least two TRPs includes an intra-cell TRP, may be understood as a multi-TA communication method in an intra-cell M-TRP system.

In the communication method based on multiple TRPs provided in the embodiments of the present disclosure, a method for acquiring TA information corresponding to any two different TRPs in at least two TRPs is provided.

In the embodiments of the present disclosure, any two different TRPs of the at least two TRPs may be referred to as a first TRP and a second TRP for convenience of description.

In the embodiment of the present disclosure, the first TRP and the second TRP may be inter-cell TRP.

The embodiment of the disclosure provides a method for acquiring TA information of each TRP in an inter-cell TRP.

In the embodiment of the present disclosure, the TA information of each TRP in the inter-cell TRP may be obtained based on a random access procedure performed by the terminal.

In one embodiment, a terminal performs an independent random access procedure using a first TRP and a second TRP, transmits random access preambles to the first TRP and the second TRP, respectively, and acquires random access responses (Random Access Response, RAR) transmitted by a network device based on the first TRP and the second TRP, respectively, and carries initial TA information in the RAR.

Fig. 5 is a flowchart illustrating a multi-TRP based communication method, which may be used in a terminal as shown in fig. 5, according to an exemplary embodiment, and may include the steps of:

in step S21, the receiving network device includes initial TA information in the RAR based on the RAR transmitted by each of the at least two TRPs.

The initial TA information may be understood as an initial TA value.

In step S22, TA information corresponding to each of the at least two TRPs is determined based on the initial TA information.

The communication method based on multiple TRPs provided by the embodiment of the disclosure can be based on RAR acquisition in the independent random access process of each TRP aiming at TA information of each TRP in the inter-cell TRP, so as to realize acquisition of multiple TA information.

In embodiments of the present disclosure, the TA information of each of the inter-cell TRPs may be indicated by a timing advance command (Time Advance Command, TAC) field included in the RAR.

Fig. 6 is a signaling structure diagram illustrating a TAC indication field of an RAR indicating a TA according to an exemplary embodiment. Referring to fig. 6, the TAC indication field of the RAR indicates that the signaling structure of TA information is a two Byte (B) 16bit structure. Wherein, include 1bit reserved bit R, 12bit TAC and 3bit UL permit instruction (grant). The UL Grant is used to instruct the UE to allow data transmission on the corresponding uplink channel.

In the embodiment of the present disclosure, for TA information corresponding to each of at least two TRPs, the TA information may be indicated by a TAC indication field of the RAR corresponding to the signaling structure shown in fig. 6. In the embodiment of the present disclosure, multiple TAs may be indicated by signaling corresponding to the number of TRPs, or multiple TAs may be indicated by one signaling.

In the embodiment of the present disclosure, when determining the TA information of the TRP, the following formula (1) may be used for calculation.

T _TA ＝(N _TA +N _TA,offset )T _c (1)

Wherein T is _TA For the TA value of the TRP determined, T _c Expressed as basic time units, e.g. as basic time units of 5G NR, e.g. T _c =0.509 ns. ns is the time unit, nanoseconds. N (N) _TA,offset May be preconfigured by signaling. In some examples, configuration may be by ServingCellConfigCommon or n-timingadvance offset in ServingCellConfigCommonSIB. Of course, if N is not configured _TA,offset Then a default value (or default value) for Frequency Range (FR) 1, 25600, may be set. It is to be appreciated that specific configuration values can be referenced to Table 7.1.2-2 in 3GPP TS 38.133, and the disclosure is not limited. N (N) _TA May be indicated by a random access response (Random Access Response, RAR) during the random access procedure. In some of the examples of the method of the present invention,if the interval of the sub-carriers is 2 ^μ At 15kHz, the initial N may be indicated by TAC in the RAR _TA The initial N can be calculated, for example, by equation (2) _TA For example, the first and second substrates may be coated, for example,

N _TA ＝T _A ·16·64/2 ^μ (2)

wherein T is _A Time advance parameter values indicated for the RAR TAC. In some examples, T _A May be indicated by 12 bits (bits). Thus T _A The values may be 0,1,2, …,3846.

Based on the above examples, the first TRP and the second TRP are exemplified in the present disclosure.

The initial TA formulas indicated by RAR TAC can be formulas (3) and (4) as follows

N _TA,1 ＝T _A,1 ·16·64/2 ^μ (3)

Wherein N is _TA,1 Initial TA information, T, for the first TRP _A,1 ＝0,1,2,…,3846。

N _TA,2 ＝T _A,2 ·16·64/2 ^μ (4)

Wherein N is _TA,2 Initial TA information, T, for the second TRP _A,2 ＝0,1,2,…,3846。

Further, in the multi-TRP based communication method provided in the embodiments of the present disclosure, the media access Control-Control unit (Medium Access Control-Control Element, MAC-CE) may send TA update information, for example, send an updated TA value.

Fig. 7 is a flowchart illustrating a multi-TRP based communication method, which may be used in a terminal as shown in fig. 7, according to an exemplary embodiment, and may include the steps of:

in step S31, MAC-CE information is received, the MAC-CE information being used to indicate updated TA information.

In step S32, TA information corresponding to each of the at least two TRPs is determined based on the updated TA information and the initial TA information.

According to the communication method based on the multiple TRPs, for the TA information of each TRP in the inter-cell TRP, updated TA information can be acquired based on the MAC-CE information, and the TA information acquisition of each TRP in at least two TRPs is determined based on the updated TA information and the initial TA information, so that the acquisition of the multiple TA information is realized.

In the embodiment of the disclosure, updated TA information corresponding to each TRP in the inter-cell TRP may be indicated by a TAC indication field included in the MAC-CE.

For convenience of description in the embodiment of the present disclosure, the TAC used to indicate the initial TA information is referred to as a first TAC, for example, the TAC in fig. 6. The TAC for indicating the updated TA information is referred to as a second TAC. Such as TAC in fig. 8.

Fig. 8 is a signaling structure diagram illustrating a TAC indication field of a MAC-CE indicating a TA according to an exemplary embodiment. Referring to fig. 8, the TAC indication field of the MAC-CE indicates that the signaling structure of the updated TA information is a 1 Byte (B) 8bit structure. Wherein, the device comprises a 2bit timing advance group identifier (Timing Advance Group Identification, TAG ID) and a 6bit TAC.

In the embodiment of the present disclosure, multiple updated TA information may be indicated through signaling corresponding to the number of TRPs, or multiple TA updated TA information may be indicated through one signaling.

In the embodiment of the present disclosure, for the TA information corresponding to each of the at least two TRPs, the TA initial information may be indicated by the TAC indication field of the RAR through the signaling structure shown in fig. 6 and the updated TA information may be indicated by the TAC indication field of the MAC-CE through the signaling result shown in fig. 8.

In the embodiment of the present disclosure, when determining the TA information of the TRP, the following equation 5 may be used for calculation.

N _TA,new ＝N _TA,old +(T _A -31)·16·64/2 ^μ (5)

Wherein N is _TA,old Initial TA, T being RAR indication _A Is updated TA information indicated by the MAC-CE. Wherein T is _A =0, 1,2, …,63, indicated by 6 bits.

The MAC-CE TAC indicates the updated TA as shown in equations 6 and 7 below

N _TA,new,1 ＝N _TA,old +(T _A,1 -31)·16·64/2 ^μ (6)

N _TA,new,2 ＝N _TA,old +(T _A,2 -31)·16·64/2 ^μ (7)

Wherein T is _A,1 TA, T being an update of the first TRP _A,1 ＝0,1,…,63。T _A,2 TA, T being an update of the second TRP _A,2 ＝0,1,…,63。

In the embodiment of the disclosure, for an inter-cell M-TRP system, different TRPs adopt independent random access procedures, a terminal respectively sends random access preambles to different TRPs (for example, a first TRP and a second TRP) so as to acquire a TA of each TRP, and then TACs in an RAR and a MAC-CE respectively or simultaneously indicate an initial TA and an updated TA for the different TRPs. Wherein "indicates respectively" indicates that different signaling indicates different TAs, and "indicates simultaneously" indicates that one signaling indicates different TAs.

It is understood that in the embodiments of the present disclosure, a typical value for the number of TRPs in an inter-cell M-TRP system is 2, i.e., includes a first TRP and a second TRP.

The embodiment of the disclosure provides a method for acquiring TA information of each TRP in an intra-cell TRP.

In the embodiment of the present disclosure, TA information of each TRP in the intra-cell TRP may be obtained based on a random access procedure of the terminal.

Wherein different TRPs may correspond to different control resource set pool indices (Control Resource Set PoolIndex, CORESET poolndex).

The TA information of each TRP in the intra-cell TRP can be used to determine the different TRP by determining whether or not there is CORESET #0 in the SSB beam direction.

In the intra-cell M-TRP system in the embodiment of the present disclosure, independent random access may be performed based on at least two TRPs, and TA information of each TRP may be obtained based on a process of performing random access by a terminal.

In the intra-cell M-TRP system according to the embodiments of the present disclosure, the random access preamble may be sent based on a specified TRP, for example, the random access preamble may be sent by a TRP including CORESET #0, which is referred to as a first TRP. The terminal initiates random access to send a random access preamble based on the first TRP, and a subsequent base station indicates random access of other TRPs (hereinafter referred to as second TRP) by using a physical downlink control channel (Physical Downlink Control Channel, PDCCH) sequence (order), or initiates random access by the terminal itself, so as to acquire TA information of a plurality of TRPs. In other words, in one embodiment, the second random access occasion is determined based on indication information sent by the network device or based on a predefined rule.

The procedure of determining at least two TRPs serving a terminal will be described below by taking the first TRP and the second TRP included in the at least two TRPs as an example.

The terminal determines a first SSB and a second SSB according to whether corresponding CORESET#0 exists or not, wherein one SSB exists corresponding to CORESET#0 in the first SSB and the second SSB, and the other SSB does not exist corresponding to CORESET#0. Wherein the TRP corresponding to the SSB with the corresponding CORESET #0 is understood to be the first TRP and the TRP corresponding to the SSB without CORESET #0 is understood to be the second TRP.

Fig. 9 is a flowchart illustrating a method for determining a TA of M-TRP in an intra-cell in a multi-TRP based communication method, which may be used in a terminal as illustrated in fig. 9, according to one exemplary embodiment, the method may include the steps of:

in step S41, it is determined that there is a first synchronization signal Block (Synchronization Signal/PBCH Block, SSB) of coreset#0 in the beam direction, and TRP corresponding to the first SSB is set as a first TRP.

In step S42, it is determined that there is no second SSB of coreset#0 in the beam direction, and the TRP corresponding to the second SSB is taken as the second TRP.

In the embodiment of the disclosure, for an intra-cell M-TRP system, determining a first TRP and a second TRP by monitoring whether CORESET #0 exists in an SSB beam direction, and performing independent random access based on the first TRP and the second TRP, so that TA information of the first TRP and the second TRP can be obtained.

In the communication method based on multiple TRP provided in the embodiments of the present disclosure, a terminal may obtain a first random access opportunity (RO) and a first random access preamble corresponding to a first SSB by receiving and monitoring CORESET #0 and a system information block (System Information Block, SIB). At a first random access occasion, a first random access preamble is transmitted based on the first TRP, the first RO and the first random access preamble corresponding to the first SSB.

It can be understood that in the embodiment of the present disclosure, even if the terminal initiates random access for the first SSB, if the first SSB does not have coreset#0, since it is required to obtain random access resources according to coreset#0 and SIB, it is also required to monitor other SSB beam directions in which coreset#0 exists.

In the embodiment of the disclosure, when the terminal determines the second TRP, the terminal may determine the second SSB, and the second RO and the second random access preamble corresponding to the second SSB, and send the second random access preamble at the second RO.

It may be appreciated that, in determining the second SSB in the embodiments of the present disclosure, the network device may instruct a synchronization signal block set (SSB index set) where the second SSB is located, and the terminal determines the second SSB from the SSB index set.

In one embodiment, determining that there is no second SSB of CORESET #0 in the beam direction comprises: and acquiring an SSB index set indicated by the network equipment, and determining that a second SSB of CORESET#0 does not exist in the beam direction in the SSB index set.

In the method for determining the TA of the M-TRP in the intra-cell based on the multi-TRP communication method provided in the embodiments of the present disclosure, after the terminal independently transmits the random access preamble based on each of the plurality of TRPs, the terminal may receive the RAR transmitted by the network device, and acquire the TA of the corresponding TRP based on the RAR.

In one embodiment, the terminal receiving network device is based on a RAR sent by each of the at least two TRPs, where the RAR includes initial TA information. The terminal determines TA information corresponding to each of the at least two TRPs based on the initial TA information.

In one embodiment, a terminal receives MAC-CE information indicating updated TA information. The terminal determines TA information corresponding to each of the at least two TRPs based on the updated TA information and the initial TA information.

Fig. 10 is a flowchart illustrating a method for determining a TA of M-TRP in an intra-cell in a multi-TRP based communication method, which may be used in a terminal as illustrated in fig. 10, according to one exemplary embodiment, the method may include the steps of:

in step S51, coreset#0 and SIBs are received and monitored, and a first SSB in which coreset#0 exists in the beam direction is acquired.

Wherein, the first RO and the first random access preamble corresponding to the first SSB.

In step S52, at the first RO, a first random access preamble is transmitted based on the first TRP.

Wherein the first RO and the first random access preamble correspond to the first SSB.

In step S53, a second SSB, and a second RO and a second random access preamble corresponding to the second SSB are determined.

In the embodiment of the disclosure, the terminal determines the second SSB, including the terminal determining the first SSB and the second SSB according to whether the corresponding coreset#0 exists, wherein one SSB exists the corresponding coreset#0 and the other SSB does not exist the corresponding coreset#0 in the first SSB and the second SSB.

In the embodiment of the disclosure, the first SSB has a corresponding coreset#0, and the second SSB does not have a corresponding coreset#0; or the first SSB does not have a corresponding CORESET #0 and the second SSB has a corresponding CORESET #0.

The terminal may determine that there is no second SSB of CORESET #0 in the beam direction in the SSB index set.

In step S54, at the second RO, a second random access preamble is transmitted based on the second TRP.

In step S55, the receiving network device includes initial TA information in the RAR based on the RAR transmitted by each of the at least two TRPs.

In step S56, MAC-CE information is received, the MAC-CE information being used to indicate updated TA information.

In step S57, TA information corresponding to each of the at least two TRPs is determined based on the updated TA information and the initial TA information.

In the embodiments of the present disclosure, for the procedure of determining the TA of the M-TRP in the intra-cell based on the initial TA information and/or the updated TA information, reference may be made to the manner of indicating the first MAC indication domain by the RAR and the manner of indicating the second MAC indication domain by the MAC-CE in the above embodiments, which are not described in detail herein.

The embodiment of the disclosure provides a communication method based on multiple TRPs, in the method, TAs are respectively configured for each TRP in the multiple TRPs, so that each TRP in the multiple TRPs adopts the respective TA to reduce system performance loss caused by time misalignment of uplink and downlink signals.

Based on the same conception, the disclosed embodiments also provide a multi-TRP based communication method performed by a network device.

Fig. 11 is a flowchart illustrating a multi-TRP based communication method, which may be used in a network device as shown in fig. 11, according to an exemplary embodiment, and may include the steps of:

in step S61, at least two TRPs serving the terminal are determined.

In step S62, TA information corresponding to each of the at least two TRPs is transmitted.

In one embodiment, the at least two TRPs comprise TRPs between different cells.

In one embodiment, the at least two TRPs comprise TRPs within the same cell.

In one embodiment, the at least two TRPs include a first TRP and a second TRP. Wherein the first TRP and the second TRP are TRP between different cells or are TRP within the same cell.

In the embodiment of the present disclosure, when the first TRP and the second TRP are TRPs in the same cell, it may be determined that a first synchronization signal block of control resource set 0 exists in the beam direction, and the TRP corresponding to the first synchronization signal block is used as the first TRP. And determining that a second synchronization signal block of the control resource set 0 does not exist in the beam direction, and taking the TRP corresponding to the second synchronization signal block as a second TRP.

In the multi-TRP based communication method provided in the embodiments of the present disclosure, a network device may send an SSB index set, and determine, as the second SSB, an SSB in which CORESET #0 does not exist in a beam direction in the SSB index set.

It may be appreciated that in the communication method based on multiple TRP provided in the embodiments of the present disclosure, the network device receives, at the first random access opportunity, the first random access preamble based on the first TRP, where the first random access opportunity and the first random access preamble correspond to the first synchronization signal block. The network device receives a second random access preamble based on the second TRP at a second random access occasion, the second random access occasion and the second random access preamble corresponding to a second synchronization signal block.

In one embodiment, the second random access occasion is determined based on indication information (e.g. PDCCH order) sent by the network device, or based on a predefined rule.

In the multi-TRP-based communication method provided in the embodiments of the present disclosure, when the network device transmits TA information corresponding to each of at least two TRPs, a random access response may be transmitted based on each of the at least two TRPs, where the random access response includes initial TA information, and the TA information corresponding to each of the at least two TRPs is determined based on the initial TA information.

In the communication method based on multiple TRPs provided in the embodiments of the present disclosure, a network device transmits MAC-CE information, where the MAC-CE information is used to indicate updated TA information. Wherein the TA information for each of the at least two TRPs is determined based on the updated TA information and the initial TA information.

It will be appreciated that some of the content involved in the multi-TRP-based communication procedure of the network device in the embodiments of the present disclosure are similar to the multi-TRP-based communication execution procedure of the terminal, and the embodiments of the present disclosure will not be described in detail herein, and reference may be made to the multi-TRP-based communication procedure of the terminal side where the description is not exhaustive.

According to the communication method based on the multi-TRP, the network equipment can realize time alignment of uplink and downlink signals based on TA information of the multi-TRP, so that ISI influence is reduced, and system performance is improved.

It may be further understood that the multi-TRP based communication method provided by the embodiments of the present disclosure is applicable to the terminal and the network device to implement multi-TRP based communication. In the process of implementing multi-TRP-based communication by the interaction between the terminal and the network device, the terminal has the terminal function related to implementing the above embodiment, and the network device has the function of implementing the network device related to the above embodiment, and the detailed description of the above embodiment will be referred to, and will not be repeated herein.

It should be understood by those skilled in the art that the various implementations/embodiments of the present disclosure may be used in combination with the foregoing embodiments or may be used independently. Whether used alone or in combination with the previous embodiments, the principles of implementation are similar. In the practice of the present disclosure, some of the examples are described in terms of implementations that are used together. Of course, those skilled in the art will appreciate that such illustration is not limiting of the disclosed embodiments.

Based on the same conception, the embodiments of the present disclosure also provide a communication apparatus based on multiple TRPs.

It will be appreciated that, in order to implement the above-described functions, the multi-TRP-based communication device provided in the embodiments of the present disclosure includes corresponding hardware structures and/or software modules that perform the respective functions. The disclosed embodiments may be implemented in hardware or a combination of hardware and computer software, in combination with the various example elements and algorithm steps disclosed in the embodiments of the disclosure. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not to be considered as beyond the scope of the embodiments of the present disclosure.

Fig. 12 is a block diagram of a multi-TRP based communication device, according to an example embodiment. Referring to fig. 12, the multi-TRP based communication apparatus 100 may be applied to a terminal including a processing unit 101 and an acquisition unit 102, for example.

Wherein the processing unit 101 is configured to determine at least two TRPs serving the terminal. An acquisition unit 102 configured to acquire TA information corresponding to each of the at least two TRPs.

In one embodiment, the at least two TRPs comprise TRPs between different cells.

In one embodiment, the at least two TRPs comprise TRPs within the same cell.

In one embodiment, the at least two TRPs include a first TRP and a second TRP. The processing unit is configured to determine at least two TRPs serving the terminal in the following manner:

determining that a first SSB of the control resource set 0 exists in the beam direction, and taking a TRP corresponding to the first SSB as a first TRP. And determining that a second SSB of the control resource set 0 does not exist in the beam direction, and taking the TRP corresponding to the second SSB as a second TRP.

In one embodiment, the obtaining unit is configured to obtain a set of SSBs indicated by the network device, and the processing unit is configured to determine that there is no second SSB of the set of control resources 0 in the SSB set in the beam direction.

In one embodiment, the multi-TRP based communication device 100 further comprises a transmission unit 103, the transmission unit 103 being configured to: at a first random access occasion, a first random access preamble is transmitted based on the first TRP, the first random access occasion and the first random access preamble corresponding to the first SSB. And transmitting a second random access preamble based on the second TRP at a second random access occasion, wherein the second random access occasion and the second random access preamble correspond to a second SSB.

In one embodiment, the obtaining unit 102 is configured to receive a RAR sent by the network device based on each of the at least two TRPs, where the RAR includes initial TA information. The processing unit 101 is configured to determine TA information corresponding to each of the at least two TRPs based on the initial TA information.

In one embodiment, the acquisition unit 102 is configured to receive MAC-CE information indicating updated TA information. The processing unit 101 is configured to determine TA information corresponding to each of the at least two TRPs based on the updated TA information and the initial TA information.

Fig. 13 is a block diagram of a multi-TRP based communication device, according to an exemplary embodiment. Referring to fig. 13, the multi-TRP based communication apparatus 200 may be applied to, for example, a network device including a processing unit 201 and a transmitting unit 202.

A processing unit 201 configured to determine at least two transmission-reception points TRP serving a terminal. A transmitting unit 202 configured to transmit TA information corresponding to each of the at least two TRPs.

In one embodiment, the at least two TRPs comprise TRPs between different cells.

In one embodiment, the at least two TRPs comprise TRPs within the same cell.

In one embodiment, the at least two TRPs include a first TRP and a second TRP.

The processing unit 201 is configured to determine at least two TRPs serving the terminal in the following manner:

In one embodiment, the sending unit 202 is configured to send the SSB set, and the processing unit 201 is configured to take, as the second SSB, an SSB in which there is no control resource set 0 in the beam direction in the SSB set.

In one embodiment, the multi-TRP based communication device 200 further comprises a receiving unit 203, the receiving unit 203 being configured to:

at a first random access occasion, receiving a first random access preamble based on the first TRP, the first random access occasion and the first random access preamble corresponding to the first SSB. At a second random access occasion, receiving a second random access preamble based on the second TRP, the second random access occasion and the second random access preamble corresponding to a second SSB.

In one embodiment, the transmitting unit 202 is configured to: the RAR is transmitted based on each of the at least two TRPs, the RAR including initial TA information. TA information corresponding to each of the at least two TRPs is determined based on the initial TA information.

In one embodiment, the sending unit 202 is further configured to: and transmitting MAC-CE information for indicating the updated TA information. The TA information for each of the at least two TRPs is determined based on the updated TA information and the initial TA information.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

Fig. 14 is a block diagram illustrating a communication apparatus 300 for multi-TRP based communication according to an exemplary embodiment. For example, apparatus 300 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, or the like.

Referring to fig. 14, the apparatus 300 may include one or more of the following components: a processing component 302, a memory 304, a power component 306, a multimedia component 308, an audio component 310, an input/output (I/O) interface 312, a sensor component 314, and a communication component 316.

The processing component 302 generally controls overall operation of the apparatus 300, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 302 may include one or more processors 320 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 302 can include one or more modules that facilitate interactions between the processing component 302 and other components. For example, the processing component 302 may include a multimedia module to facilitate interaction between the multimedia component 308 and the processing component 302.

Memory 304 is configured to store various types of data to support operations at apparatus 300. Examples of such data include instructions for any application or method operating on the device 300, contact data, phonebook data, messages, pictures, videos, and the like. The memory 304 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power component 306 provides power to the various components of the device 300. The power components 306 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 300.

The multimedia component 308 includes a screen between the device 300 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 308 includes a front-facing camera and/or a rear-facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the apparatus 300 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 310 is configured to output and/or input audio signals. For example, the audio component 310 includes a Microphone (MIC) configured to receive external audio signals when the device 300 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, audio component 310 further comprises a speaker for outputting audio signals.

The I/O interface 312 provides an interface between the processing component 302 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 314 includes one or more sensors for providing status assessment of various aspects of the apparatus 300. For example, the sensor assembly 314 may detect the on/off state of the device 300, the relative positioning of the components, such as the display and keypad of the device 300, the sensor assembly 314 may also detect a change in position of the device 300 or a component of the device 300, the presence or absence of user contact with the device 300, the orientation or acceleration/deceleration of the device 300, and a change in temperature of the device 300. The sensor assembly 314 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. The sensor assembly 314 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 314 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 316 is configured to facilitate communication between the apparatus 300 and other devices, either wired or wireless. The device 300 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 316 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 300 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 304, including instructions executable by processor 320 of apparatus 300 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

Fig. 15 is a block diagram illustrating a communication device for multi-TRP based communication according to an exemplary embodiment. For example, the apparatus 400 may be provided as a network device. Referring to fig. 15, the apparatus 400 includes a processing component 422 that further includes one or more processors, and memory resources represented by memory 432, for storing instructions, such as applications, executable by the processing component 422. The application program stored in memory 432 may include one or more modules each corresponding to a set of instructions. Further, the processing component 422 is configured to execute instructions to perform the above-described methods.

The apparatus 400 may also include a power component 426 configured to perform power management of the apparatus 400, a wired or wireless network interface 450 configured to connect the apparatus 400 to a network, and an input output (I/O) interface 458. The apparatus 400 may operate based on an operating system stored in the memory 432, such as Windows Server, mac OS XTM, unixTM, linuxTM, freeBSDTM or the like.

In an exemplary embodiment, a non-transitory computer-readable storage medium is also provided, such as a memory 432, comprising instructions executable by the processing component 422 of the apparatus 400 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

It is further understood that the term "plurality" in this disclosure means two or more, and other adjectives are similar thereto. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It is further understood that the terms "first," "second," and the like are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the expressions "first", "second", etc. may be used entirely interchangeably. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

A communication method based on multiple transmission and reception points, which is applied to a terminal, the method comprising:

determining at least two transmission reception points TRP serving the terminal;

timing advance information corresponding to each of the at least two TRPs is acquired.
The method of claim 1, wherein the at least two TRPs comprise TRPs between different cells.
The method of claim 1, wherein the at least two TRPs comprise TRPs within a same cell.
The method of claim 3, wherein the at least two TRPs comprise a first TRP and a second TRP;

the determining at least two TRPs serving the terminal, comprising:

determining that a first synchronization signal block of a control resource set 0 exists in the beam direction, and taking a TRP corresponding to the first synchronization signal block as a first TRP;

and determining that a second synchronous signal block of the control resource set 0 does not exist in the beam direction, and taking the TRP corresponding to the second synchronous signal block as a second TRP.
The method of claim 4, wherein determining that there is no second synchronization signal block of control resource set 0 in the beam direction comprises:

and acquiring a synchronization signal block set indicated by the network equipment, and determining that a second synchronization signal block of the control resource set 0 does not exist in the beam direction in the synchronization signal block set.
The method according to claim 4 or 5, characterized in that the method further comprises:

transmitting a first random access preamble based on the first TRP at a first random access occasion, wherein the first random access occasion and the first random access preamble correspond to the first synchronization signal block;

And at a second random access occasion, transmitting a second random access preamble based on the second TRP, wherein the second random access occasion and the second random access preamble correspond to the second synchronous signal block.
The method of claim 6, wherein the second random access occasion is determined based on indication information sent by a network device or based on a predefined rule.
The method according to any one of claims 1 to 7, wherein the acquiring timing advance information corresponding to each of the at least two TRPs comprises:

receiving a random access response sent by the network equipment based on each TRP in the at least two TRPs, wherein the random access response comprises initial timing advance information;

based on the initial timing advance information, timing advance information corresponding to each of the at least two TRPs is determined.
The method of claim 8, wherein said determining timing advance information corresponding to each of said at least two TRPs based on said initial timing advance information comprises:

receiving media access control-control unit (MAC-CE) information, wherein the MAC-CE information is used for indicating updated timing advance information;

Based on the updated timing advance information and the initial timing advance information, timing advance information corresponding to each of the at least two TRPs is determined.
A method of communication based on multiple transmission and reception points, applied to a network device, the method comprising:

determining at least two transmission and reception points TRP for providing service for a terminal;

transmitting timing advance information corresponding to each of the at least two TRPs.
The method of claim 10, wherein the at least two TRPs comprise TRPs between different cells.
The method of claim 10, wherein the at least two TRPs comprise TRPs within a same cell.
The method of claim 12, wherein the at least two TRPs comprise a first TRP and a second TRP;

the determining at least two TRPs serving the terminal, comprising:

determining that a first synchronization signal block of a control resource set 0 exists in the beam direction, and taking a TRP corresponding to the first synchronization signal block as a first TRP;

and determining that a second synchronous signal block of the control resource set 0 does not exist in the beam direction, and taking the TRP corresponding to the second synchronous signal block as a second TRP.
The method of claim 13, wherein the determining that there is no second synchronization signal block of control resource set 0 in the beam direction comprises:

and transmitting a synchronization signal block set, and taking the synchronization signal block which does not have the control resource set 0 in the beam direction in the synchronization signal block set as a second synchronization signal block.
The method according to claim 13 or 14, characterized in that the method further comprises:

receiving a first random access preamble based on the first TRP at a first random access occasion, wherein the first random access occasion and the first random access preamble correspond to the first synchronization signal block;

and receiving a second random access preamble based on the second TRP at a second random access occasion, wherein the second random access occasion and the second random access preamble correspond to the second synchronous signal block.
The method of claim 15, wherein the second random access occasion is determined based on indication information transmitted by the network device or based on a predefined rule.
The method according to any one of claims 10 to 16, wherein said transmitting timing advance information corresponding to each of said at least two TRPs comprises:

Transmitting a random access response based on each of the at least two TRPs, the random access response including initial timing advance information;

timing advance information corresponding to each of the at least two TRPs is determined based on the initial timing advance information.
The method of claim 17, wherein the method further comprises:

transmitting media access control-control unit (MAC-CE) information for indicating updated timing advance information;

timing advance information for each of the at least two TRPs is determined based on the updated timing advance information and the initial timing advance information.
A multi-transmission-reception-point-based communication apparatus, comprising:

a processing unit configured to determine at least two transmission reception points TRP serving a terminal;

an acquisition unit configured to acquire timing advance information corresponding to each of the at least two TRPs.
A multi-transmission-reception-point-based communication apparatus, comprising:

a processing unit configured to determine at least two transmission reception points TRP serving a terminal;

a transmitting unit configured to transmit timing advance information corresponding to each of the at least two TRPs.
A multi-transmission-reception-point-based communication apparatus, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: performing the method of any one of claims 1 to 9.
A multi-transmission-reception-point-based communication apparatus, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: performing the method of any one of claims 10 to 18.
A storage medium having instructions stored therein which, when executed by a processor of a terminal, enable the terminal to perform the method of any one of claims 1 to 9.
A storage medium having instructions stored therein which, when executed by a processor of a network device, enable the network device to perform the method of any one of claims 10 to 18.