CN117156574A - Communication method, base station side device, network device, and storage medium - Google Patents

Communication method, base station side device, network device, and storage medium Download PDF

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Publication number
CN117156574A
CN117156574A CN202210557266.0A CN202210557266A CN117156574A CN 117156574 A CN117156574 A CN 117156574A CN 202210557266 A CN202210557266 A CN 202210557266A CN 117156574 A CN117156574 A CN 117156574A
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China
Prior art keywords
trp
terminal
time offset
mtrp
timing advance
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Inventor
雷超琴
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ZTE Corp
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ZTE Corp
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Priority to CN202210557266.0A priority Critical patent/CN117156574A/en
Priority to PCT/CN2023/092828 priority patent/WO2023221805A1/en
Publication of CN117156574A publication Critical patent/CN117156574A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the application relates to the field of communication and discloses a communication method, base station side equipment, network equipment and a storage medium. The method comprises the following steps: determining a first timing advance TA between the terminal and the first TRP and a second timing advance TA between the terminal and the second TRP according to uplink signals respectively received by the first transmission receiving point TRP and the second transmission receiving point TRP and sent by the same terminal; according to the first TA and the second TA, predicting the time offset between the downlink signals sent by the terminal based on the multi-transmission receiving point MTRP and the first TRP and the second TRP; and under the condition that the absolute value of the time offset is detected to not exceed one cyclic prefix CP, carrying out MTRP-based downlink communication with the terminal through the first TRP and the second TRP. The problem of decoding failure caused by that downlink signals sent by a plurality of TRPs exceed the allowed time of a protocol on the terminal side is avoided, and the decoding success rate is improved.

Description

Communication method, base station side device, network device, and storage medium
Technical Field
The embodiment of the application relates to the field of communication, in particular to a communication method, base station side equipment, network equipment and a storage medium.
Background
The third generation partnership project (3rd Generation Partnership Project,3GPP) proposes a terminal-visible joint transmission technique, multiple transmission and Reception points (Multi Transmission/Reception points, MTRP), in Release 16 protocol of the fifth generation mobile communication technology (5 th-Generation Mobile Communication Technology, 5G). The method is further expanded and enhanced for the coordinated multi-Point Transmission technology (Coordinated multiple Point, coMP) based on the fourth generation mobile communication technology (4 th-Generation Mobile Communication Technology, 4G), can support not only the Transmission/Reception Point (TRP) Transmission of data, but also the Transmission of the scheduling information of the physical downlink control channel (Physical Downlink Control Channel, PDCCH) in different TRPs, so that the scheduling applicability of multi-Point coordination becomes stronger.
In the downlink direction, MTRP can be classified into two types, single PDCCH and multiple PDCCH. For a single PDCCH, the base station side only needs to send one PDCCH, and the terminal receives only one PDCCH, but the data of the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) scheduled by the PDCCH can be sent from two TRPs, so that the throughput of the terminal is improved; for multiple PDCCHs, the base station side simultaneously transmits one PDCCH to the terminal through two TRPs, the terminal receives two PDCCHs, the two PDCCHs schedule one PDSCH respectively, the two scheduled PDSCHs are transmitted to the terminal from corresponding TRPs in the two TRPs respectively, and the throughput of the terminal is also improved.
However, the terminal has a problem of decoding failure based on the downlink signal received by the MTRP.
Disclosure of Invention
The main purpose of the embodiments of the present application is to provide a communication method, a base station side device, a network device, and a storage medium, which aim to control the time offset between downlink signals sent by a plurality of TRPs based on MTRP received by a terminal in one CP, avoid the decoding failure problem caused by the fact that the time allowed by a protocol is exceeded when the downlink signals sent by the plurality of TRPs are received by the terminal, and improve the decoding success rate.
To achieve the above object, an embodiment of the present application provides a communication method, including: determining a first Timing Advance (TA) between a terminal and a first TRP and a second Timing Advance (TA) between the terminal and a second TRP according to uplink signals respectively received by the first TRP and the second TRP and sent by the same terminal; according to the first TA and the second TA, predicting the time offset between the downlink signals sent by the terminal and the first TRP and the second TRP based on a multi-transmission receiving point MTRP; and under the condition that the absolute value of the time offset does not exceed one cyclic prefix CP, carrying out multi-transmission receiving point MTRP downlink communication with the terminal through the first TRP and the second TRP.
In order to achieve the above object, an embodiment of the present application further provides a base station side device, including: an acquisition module, configured to determine a first timing advance TA between a first transmission receiving point TRP and a second timing advance TA between the terminal and a second TRP according to uplink signals sent by the same terminal and received by the first transmission receiving point TRP and the second transmission receiving point TRP respectively; a prediction module, configured to predict, according to the first TA and the second TA, a time offset between the terminal receiving the downlink signals sent by the first TRP and the second TRP based on the multiple transmission reception point MTRP; and the sending module is used for carrying out MTRP-based downlink communication with the terminal through the first TRP and the second TRP under the condition that the absolute value of the time offset is detected to not exceed one cyclic prefix CP.
To achieve the above object, an embodiment of the present application further provides a network device, where the device includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the communication method as described above.
To achieve the above object, an embodiment of the present application also proposes a computer-readable storage medium storing a computer program which, when executed by a processor, implements a communication method as described above.
According to the communication method provided by the embodiment of the application, before the downlink signals are sent to the terminal based on the MTRP, the first TA between the terminal and the first TRP and the second TA between the terminal and the second TRP are determined according to the uplink signals sent by the same terminal and respectively received by the first TRP and the second TRP, namely, the uplink communication conditions of the first TRP and the second TRP are acquired firstly, so that the time offset between the terminal and the downlink signals sent by the first TRP and the second TRP based on the MTRP is predicted according to the first TA and the second TA, the downlink communication conditions are predicted according to the time offset between the terminal and the downlink signals sent by the MTRP, and the problem that the decoding success rate of the terminal can be improved when the terminal receives multiple downlink communication protocols based on the MTRP is met is solved.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings.
FIG. 1 is a flow chart of a communication method provided in an embodiment of the application;
fig. 2 is a flowchart of a communication method including steps of determining a first TA and a second TA according to uplink signals transmitted by a terminal that have been received last time by the first TRP and the second TRP, respectively, according to another embodiment of the present application;
FIG. 3 is a flow chart of a communication method including a filtering step provided in another embodiment of the present application;
FIG. 4 is a flow chart of a communication method including the step of detecting whether the absolute value of a time offset exceeds one CP, provided in another embodiment of the present application;
fig. 5 is a schematic structural diagram of a base station side device provided in another embodiment of the present application;
fig. 6 is a schematic structural diagram of a network device according to another embodiment of the present application.
Detailed Description
As known from the background art, the terminal has a problem of decoding failure based on the downlink signal received by the MTRP.
It was found by analysis that the cause of the above problems was: in 3GPP, the receiving time offset between the downlink signals from two TRPs received by the terminal is required to be within one Cyclic Prefix (CP), and the current MTRP cannot guarantee that the receiving time offset between the downlink signals from two TRPs is within one CP, so that the situation may occur that the downlink signals sent by two TRPs cannot be decoded normally.
In order to solve the above problems, an embodiment of the present application provides a communication method, including: determining a first Timing Advance (TA) between a terminal and a first TRP and a second Timing Advance (TA) between the terminal and a second TRP according to uplink signals respectively received by the first TRP and the second TRP and sent by the same terminal; according to the first TA and the second TA, predicting the time offset between the downlink signals sent by the terminal and the first TRP and the second TRP based on a multi-transmission receiving point MTRP; and under the condition that the absolute value of the time offset does not exceed one cyclic prefix CP, carrying out multi-transmission receiving point MTRP downlink communication with the terminal through the first TRP and the second TRP.
According to the communication method provided by the embodiment of the application, before the downlink signals are sent to the terminal based on the MTRP, the first TA between the terminal and the first TRP and the second TA between the terminal and the second TRP are determined according to the uplink signals sent by the same terminal and respectively received by the first TRP and the second TRP, namely, the uplink communication conditions of the first TRP and the second TRP are acquired firstly, so that the time offset between the terminal and the downlink signals sent by the first TRP and the second TRP based on the MTRP is predicted according to the first TA and the second TA, the downlink communication conditions are predicted according to the time offset between the terminal and the downlink signals sent by the MTRP, and the problem that the decoding success rate of the terminal can be improved when the terminal receives multiple downlink communication protocols based on the MTRP is met is solved.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those of ordinary skill in the art that in various embodiments of the present application, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the claimed technical solution of the present application can be realized without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not be construed as limiting the specific implementation of the present application, and the embodiments can be mutually combined and referred to without contradiction.
In one aspect, the embodiment of the application provides a communication method, which is applied to base station side equipment and is applied to a downlink communication process. The flow is shown in fig. 1, and at least comprises the following steps:
step 101, determining a first timing advance TA between the terminal and the first TRP and a second timing advance TA between the terminal and the second TRP according to uplink signals sent by the same terminal and received by the first and second transmission receiving points TRP and TRP respectively.
In this embodiment, the terminal is a user equipment located in an overlapping coverage area of at least two TRPs, the first TRP and the second TRP are cells with overlapping coverage areas, and the terminal is located in the overlapping coverage area.
It should be noted that only the user equipment located in the overlapping coverage area of at least two TRPs may perform downlink communication based on MTRP, otherwise, the user equipment is covered by only one TRP, only one TRP is used in downlink communication, and MTRP cannot be implemented. The base station side transmits a signal to the user side. Also, the ability of the first TRP and the second TRP to receive the uplink signal transmitted by the terminal means that the terminal can communicate with the first TRP and the second TRP, i.e., the terminal is located within the overlapping coverage range of the first TRP and the second TRP.
It will be appreciated that a terminal may be within overlapping coverage of multiple MTRP and thus participate in MTRP-based downlink communications with different TRP combinations. In some cases, the first TRP may be a TRP accessed by the terminal, and the second TRP may be any TRP having an overlapping coverage area with the first TRP coverage area and the terminal is located in the overlapping coverage area. Further, it is also considered to increase the performance requirement for TRP to increase the reception performance at the user side, such as in terms of the power of the signal received from the terminal, the second TRP also satisfies the following condition: the second TRP is the TRP with an overlapping coverage area with the coverage area of the first TRP, and the signal power is highest in the TRPs with the terminal positioned in the overlapping coverage area; from the power equalization of the downlink signal of the first TRP and the second TRP to the terminal, the second TRP also satisfies the following condition: and I P1-P2I is less than or equal to T, wherein P1 is the power value when a signal with the power P transmitted by the first TRP reaches the terminal, P2 is the power value when a signal with the power P transmitted by the second TRP reaches the terminal, T is a preset power threshold, and particularly, T can be 6dB. That is, before step 101, the method may further include a step of determining, based on the determined terminal, a first TRP and a second TRP corresponding to the terminal, e.g., determining that the TRP to which the terminal is connected is the first TRP after determining that downlink communication with the terminal is required, and selecting, as the second TRP, one TRP having the highest signal power from among the TRPs covering at least one non-first TRP of the terminal a.
In some examples, the uplink signals include physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) and/or channel sounding reference signals (Sounding Reference Signal, SRS). That is, the first Timing Advance (TA) and the second TA may be determined according to PUSCH, or determined according to SRS, or determined according to both PUSCH and SRS.
After receiving the uplink signal sent by the terminal, the first TRP and the second TRP measure the time offset of the uplink signal, so as to generate a first TA corresponding to the first TRP and a second TA corresponding to the second TRP according to the measurement result.
It may also be appreciated that a TA may be obtained when an uplink signal is received, and the terminal may send the uplink signal multiple times, so that the first TA and the second TA may be from one uplink signal or from multiple uplink signals.
Based on this, in some embodiments, as shown in fig. 2, step 101 may be implemented by:
step 1011, determining the first TA and the second TA according to the uplink signals sent by the terminal and received by the first TRP and the second TRP respectively last time.
In this embodiment, the first TA and the second TA are each from one uplink signal, and two TAs determined based on the two uplink signals are determined as the first TA and the second TA, respectively.
The uplink signal received last time may be the uplink signal received last time and used for determining TA, or may be the specific uplink signal received last time and used for determining TA. If the signal closest to the current time in all the received PUSCHs and SRS is used as the last received uplink signal, and the last received SRS is used as the last received uplink signal, the details will not be repeated here.
In still other embodiments, as shown in fig. 3, step 101 may also be implemented by:
step 1012, determining a plurality of TA values between the terminal and the first TRP and a plurality of TA values between the terminal and the second TRP according to the uplink signals sent by the terminal and received by the first TRP and the second TRP respectively.
The TA values in this embodiment may be determined according to a plurality of uplink signals of the same type, or may be determined according to at least one uplink signal of each of different types.
Step 1013, filtering the plurality of TA values between the terminal and the first TRP and the plurality of TA values between the terminal and the second TRP to obtain the first TA and the second TA.
The filtering method is not limited in this embodiment, and may be a recursive average filtering method, a median average filtering method, or the like.
In order to facilitate a better understanding of the present embodiment by those skilled in the art, the present embodiment will be exemplified below.
In some examples, the first TA and the second TA are from a recently acquired set of PUSCH and SRS, wherein the first TA is the largest one of two TA values determined from the last received PUSCH and last received SRS of the first TRP and the second TA is the largest one of two TA values determined from the last received PUSCH and last received SRS of the second TRP.
In other examples, the first TA and the second TA are determined from the acquired n SRS, wherein the first TA and the second TA are determined according to the following expression:
TA＇＝Σ(α i *TA i )，i＝1，2，…，n
wherein TA' is the first TA or the second TA, Σα i ＝1，0＜α i ≤1，TA i The TA value corresponding to the ith SRS.
The n SRS may be n SRS received recently, or n TA values reserved after the maximum TA value and the minimum TA value are removed from TA values corresponding to n+2 SRS acquired recently.
Step 102, according to the first TA and the second TA, the time offset between the downlink signals sent by the terminal and the second TRP based on the multiple transmission receiving point MTRP is predicted.
In this embodiment, according to the relationship between the uplink communication and the downlink communication, a prediction expression mapped from the uplink communication to the downlink communication is determined, so that the time offset is predicted according to the first TA, the second TA, and the preset prediction expression.
In some examples, the upstream predictive expression includes:
TA_diff＝(TA1-TA2)/2，
where ta_diff represents the time offset, TA1 represents the first TA, and TA2 represents the second TA.
It should be noted that, a preset offset value may be introduced into the above prediction expression to compensate for deviations caused by uplink and downlink not strictly adhering to the uplink-downlink association relationship due to different influences.
And step 103, carrying out MTRP-based downlink communication with the terminal through the first TRP and the second TRP under the condition that the absolute value of the time offset is detected to not exceed one cyclic prefix CP.
In this embodiment, the absolute value of the time offset does not exceed one CP, that is, the time difference between the arrival of the downlink signals sent by the first TRP and the second TRP by adopting the MTRP mode does not exceed one CP, so that the downlink signals sent by the first TRP and the second TRP and based on the association relationship generated by the MTRP meet the receiving requirement of the protocol on the terminal side, and decoding failure caused by that the time allowed by the protocol is exceeded when the downlink signals sent by the plurality of TRPs are received by the terminal side is avoided, therefore, downlink communication can be performed based on the MTRP, and the first TRP and the second TRP participate in the MTRP.
Accordingly, in the case that the absolute value of the time offset is detected to exceed one CP, since the downlink signal transmitted by the plurality of TRPs is received at the terminal for a time exceeding the allowed time of the protocol, it is not suitable for downlink communication based on MTRP, and therefore, downlink communication is performed using a single TRP, wherein the single TRP may be the first TRP, and in particular, when the first TRP is the TRP to which the terminal accesses, the downlink communication is performed using the first TRP, thereby avoiding the switching of TRPs.
Based on this, in some embodiments, as shown in fig. 4, the communication method further includes the steps of:
step 104, it is detected whether the absolute value of the time offset exceeds one CP. If yes, go to step 105, if no, go to step 103.
Step 105, downlink communication is performed with the terminal through the first TRP.
Moreover, it should be understood that the above steps of the various methods are divided, for clarity of description, and may be combined into one step or split into multiple steps when implemented, so long as they include the same logic relationship, and all the steps are within the scope of protection of the present patent; it is within the scope of this patent to add insignificant modifications to the algorithm or flow or introduce insignificant designs, but not to alter the core design of its algorithm and flow.
In another aspect, an embodiment of the present application further provides a base station side device, as shown in fig. 5, including:
an acquisition module 501, configured to determine a first timing advance TA between the terminal and the first TRP and a second timing advance TA between the terminal and the second TRP according to uplink signals sent by the same terminal and received by the first transmission receiving point TRP and the second transmission receiving point TRP respectively.
A prediction module 502, configured to predict, according to the first TA and the second TA, a time offset between the downlink signals sent by the terminal based on the multiple transmission reception points MTRP and the first TRP and the second TRP.
A transmitting module 503, configured to perform MTRP-based downlink communication with the terminal through the first TRP and the second TRP if it is detected that the absolute value of the time offset does not exceed one cyclic prefix CP.
It is to be noted that this embodiment is an apparatus embodiment corresponding to the method embodiment, and this embodiment may be implemented in cooperation with the method embodiment. The related technical details mentioned in the method embodiment are still valid in this embodiment, and in order to reduce repetition, they are not described here again. Accordingly, the related technical details mentioned in the present embodiment may also be applied in the method embodiment.
It should be noted that, each module involved in this embodiment is a logic module, and in practical application, one logic unit may be one physical unit, or may be a part of one physical unit, or may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, units less closely related to solving the technical problem presented by the present application are not introduced in the present embodiment, but it does not indicate that other units are not present in the present embodiment.
In another aspect, an embodiment of the present application further provides a network device, as shown in fig. 6, including: at least one processor 601; and a memory 602 communicatively coupled to the at least one processor 601; the memory 602 stores instructions executable by the at least one processor 601, the instructions being executable by the at least one processor 601 to enable the at least one processor 601 to perform the communication method described in any one of the method embodiments described above.
Where the memory 602 and the processor 601 are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting the various circuits of the one or more processors 601 and the memory 602. The bus may also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or may be a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 601 is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor 601.
The processor 601 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 602 may be used to store data used by processor 601 in performing operations.
Another aspect of the embodiments of the present application also provides a computer-readable storage medium storing a computer program. The computer program, when executed by a processor, implements the communication method described in any of the method embodiments described above.
That is, it will be understood by those skilled in the art that all or part of the steps in implementing the methods of the embodiments described above may be implemented by a program stored in a storage medium, where the program includes several instructions for causing a device (which may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps in the methods of the embodiments of the application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the application and that various changes in form and details may be made therein without departing from the spirit and scope of the application.

Claims (10)

1. A method of communication, comprising:
determining a first Timing Advance (TA) between a terminal and a first TRP and a second Timing Advance (TA) between the terminal and a second TRP according to uplink signals respectively received by the first TRP and the second TRP and sent by the same terminal;
according to the first TA and the second TA, predicting the time offset between the downlink signals sent by the terminal and the first TRP and the second TRP based on a multi-transmission receiving point MTRP;
and under the condition that the absolute value of the time offset is detected to not exceed one cyclic prefix CP, performing MTRP-based downlink communication with the terminal through the first TRP and the second TRP.
2. The communication method according to claim 1, wherein predicting, from the first TA and the second TA, a time offset between the reception of the first TRP and the reception of the downlink signal transmitted by the second TRP based on the multiple transmission reception point MTRP by the terminal comprises:
predicting the time offset according to the first TA, the second TA and a preset prediction expression, wherein the prediction expression comprises:
TA_diff＝(TA1-TA2)/2，
wherein ta_diff represents the time offset, TA1 represents the first TA, and TA2 represents the second TA.
3. The communication method according to claim 1 or 2, wherein the determining the first timing advance TA between the terminal and the first TRP and the second timing advance TA between the terminal and the second TRP according to the uplink signals sent by the same terminal and received by the first transmission receiving point TRP and the second transmission receiving point TRP respectively, comprises:
and determining the first TA and the second TA according to the uplink signals sent by the terminal and received by the first TRP and the second TRP respectively last time.
4. The communication method according to claim 1 or 2, wherein the determining the first timing advance TA between the terminal and the first TRP and the second timing advance TA between the terminal and the second TRP according to the uplink signals sent by the same terminal and received by the first transmission receiving point TRP and the second transmission receiving point TRP respectively, comprises:
determining a plurality of Timing Advance (TA) values between the terminal and the first TRP and a plurality of TA values between the terminal and the second TRP according to the uplink signals sent by the terminal and respectively received by the first TRP and the second TRP for a plurality of times;
and respectively filtering a plurality of TA values between the terminal and the first TRP and a plurality of TA values between the terminal and the second TRP to obtain the first TA and the second TA.
5. The communication method according to claim 1 or 2, wherein after predicting, according to the first TA and the second TA, a time offset between the reception of the first TRP and the downlink signal transmitted by the second TRP based on the multiple transmission reception point MTRP by the terminal, the method further comprises:
and carrying out downlink communication with the terminal through the first TRP under the condition that the absolute value of the time offset exceeds one CP.
6. The communication method according to claim 1 or 2, characterized in that the first TRP is a TRP to which the terminal is accessed; the second TRP satisfies the following condition:
|P1-P2|≤T，
wherein P1 is a power value when the signal with power P sent by the first TRP reaches the terminal, P2 is a power value when the signal with power P sent by the second TRP reaches the terminal, and T is a preset power threshold.
7. The communication method according to claim 1 or 2, wherein the uplink signal comprises a PUSCH and/or SRS based on a physical uplink shared channel.
8. A base station side apparatus characterized by comprising:
an acquisition module, configured to determine a first timing advance TA between a first transmission receiving point TRP and a second timing advance TA between the terminal and a second TRP according to uplink signals sent by the same terminal and received by the first transmission receiving point TRP and the second transmission receiving point TRP respectively;
a prediction module, configured to predict, according to the first TA and the second TA, a time offset between the terminal receiving the downlink signals sent by the first TRP and the second TRP based on the multiple transmission reception point MTRP;
and the sending module is used for carrying out MTRP-based downlink communication with the terminal through the first TRP and the second TRP under the condition that the absolute value of the time offset is detected to not exceed one cyclic prefix CP.
9. A network device, comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the communication method of any one of claims 1 to 7.
10. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the communication method according to any one of claims 1 to 7.
CN202210557266.0A 2022-05-20 2022-05-20 Communication method, base station side device, network device, and storage medium Pending CN117156574A (en)

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CN202210557266.0A CN117156574A (en) 2022-05-20 2022-05-20 Communication method, base station side device, network device, and storage medium
PCT/CN2023/092828 WO2023221805A1 (en) 2022-05-20 2023-05-08 Communication method, base station-side device, network device and storage medium

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