CN117279029A - Data transmission method, terminal, device and storage medium - Google Patents

Data transmission method, terminal, device and storage medium Download PDF

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Publication number
CN117279029A
CN117279029A CN202210653619.7A CN202210653619A CN117279029A CN 117279029 A CN117279029 A CN 117279029A CN 202210653619 A CN202210653619 A CN 202210653619A CN 117279029 A CN117279029 A CN 117279029A
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China
Prior art keywords
data stream
layer
coded data
trp
terminal
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CN202210653619.7A
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Chinese (zh)
Inventor
雷超琴
刘巧艳
费腾
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ZTE Corp
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ZTE Corp
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Priority to CN202210653619.7A priority Critical patent/CN117279029A/en
Priority to PCT/CN2023/095146 priority patent/WO2023236755A1/en
Publication of CN117279029A publication Critical patent/CN117279029A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0273—Traffic management, e.g. flow control or congestion control adapting protocols for flow control or congestion control to wireless environment, e.g. adapting transmission control protocol [TCP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
    • 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
    • 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
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling

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

Abstract

The embodiment of the application relates to the technical field of communication and discloses a data transmission method, a terminal, equipment and a storage medium. The method is applied to the base station side and comprises the following steps: performing layer mapping and coding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH to obtain n layers of coded data streams; n is a positive integer; and transmitting the n-layer coded data stream to a terminal through a first transmission receiving point TRP, and transmitting an m-layer coded data stream in the encoded n-layer coded data stream to the terminal through a second TRP, wherein m is a positive integer. The terminal is located in an overlapping coverage area of the first TRP and the second TRP. The first TRP sends the complete PDSCH data and the second TRP repeatedly sends partial PDSCH data, when the terminal receives the data, the decoding can be carried out according to the data sent by the TRP sending the complete PDSCH data, if the decoding is incorrect, the data sent by the second TRP can be combined and then finally decoded, and the performance of receiving the PDSCH at the terminal side is improved.

Description

Data transmission method, terminal, device and storage medium
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a data transmission method, a terminal, 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 improvement of the receiving performance of the MTRP at the terminal side in the single PDCCH mode requires that the performance, such as the power, of all the TRPs participating in the MTRP is improved, which is complicated and has higher cost.
Disclosure of Invention
The main purpose of the embodiments of the present application is to provide a data transmission method, a terminal, a device, and a storage medium, which aim to improve the receiving performance of an MTRP at a terminal side under a single PDCCH, and not need to improve the performance of all TRPs participating in the MTRP, so as to reduce the complexity and cost for improving the receiving performance of the terminal side.
In order to achieve the above object, an embodiment of the present application provides a data transmission method, applied to a base station side, where the method includes: performing layer mapping and coding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH to obtain n layers of coded data streams; n is a positive integer; transmitting the n-layer coded data stream to a terminal through a first transmission receiving point TRP, and transmitting an m-layer coded data stream in the encoded n-layer coded data stream to the terminal through a second TRP, wherein m is a positive integer; the terminal is located in an overlapping coverage area of the first TRP and the second TRP.
In order to achieve the above objective, an embodiment of the present application further provides a data transmission method, which is applied to a terminal, and includes: receiving an n-layer coded data stream sent by a base station side through a first TRP and an m-layer coded data stream in the n-layer coded data stream sent by a second TRP; n and m are positive integers; and decoding according to the n-layer coded data stream and the m-layer coded data stream to obtain PDSCH data scheduled by a single PDCCH.
In order to achieve the above object, an embodiment of the present application further provides a base station side device, including: the mapping and coding module is used for carrying out layer mapping and coding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH to obtain n layers of coded data streams; n is a positive integer; a transmitting module, configured to transmit the n-layer encoded data stream to a terminal through a first transmission and reception point TRP, and transmit, to the terminal through a second TRP, an m-layer encoded data stream in the encoded n-layer encoded data stream, where m is a positive integer; the terminal is located in an overlapping coverage area of the first TRP and the second TRP.
In order to achieve the above object, an embodiment of the present application further provides a terminal, including: a receiving module, configured to receive an n-layer encoded data stream sent by a base station side through a first TRP and an m-layer encoded data stream in the n-layer encoded data stream sent by a second TRP; n and m are positive integers; and the decoding module is used for decoding according to the n-layer coded data stream and the m-layer coded data stream to obtain PDSCH data scheduled by a single PDCCH.
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 data transmission method as claimed in any one of the preceding claims.
To achieve the above object, an embodiment of the present application further provides a computer readable storage medium storing a computer program, where the computer program is executed by a processor to implement a data transmission method according to any one of the above.
According to the data transmission method, after layer mapping and coding are carried out on PDSCH data scheduled by a single PDCCH to obtain n layers of coded data streams, a base station side sends the n layers of coded data streams to a terminal located in an overlapping coverage area of a first TRP and a second TRP through a first transmission receiving point TRP, sends m layers of coded data streams in the coded n layers of coded data streams to the terminal located in the overlapping coverage area of the first TRP and the second TRP through the second TRP, namely, all n layers of coded data streams are distributed to the first TRP for transmission, and at least one part of m layers of coded data streams in the n layers of coded data streams are distributed to the second TRP for transmission. Therefore, when the terminal receives the PDSCH, the terminal can only select the complete n-layer data sent by the first TRP to decode, if the decoding is incorrect, the data sent by the second TRP can be combined and finally decoded again, so that the receiving performance of the PDSCH at the terminal side is improved.
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 data transmission method provided in an embodiment of the present application;
fig. 2 is a flowchart of a data transmission method including a step of transmitting layer number information provided in another embodiment of the present application;
FIG. 3 is a flow chart of a data transmission method including the step of receiving an encoded data stream provided in another embodiment of the present application;
fig. 4 is a flowchart of a data transmission method including a step of receiving layer number information provided in another embodiment of the present application;
FIG. 5 is an interactive flow chart of a data transmission method provided in another embodiment of the present application;
fig. 6 is a schematic structural diagram of a base station side device provided in another embodiment of the present application;
fig. 7 is a schematic structural view of a terminal provided in another embodiment of the present application;
fig. 8 is a schematic structural view of an electronic device provided in another embodiment of the present application.
Detailed Description
As known from the background art, the improvement of the receiving performance of the MTRP at the terminal side in the current single PDCCH mode requires the improvement of the performance of all the TRPs participating in the MTRP, which is complex and has higher cost.
It was found by analysis that the cause of the above problems was: if the MTRP adopts a space division multiplexing (Space Division Multiplexing, SDM) mode in the single PDCCH mode, different parts of PDSCH data of the single PDCCH schedule are allocated to different TRP transmissions, so that the data transmitted by multiple TRPs needs to be combined in order to obtain the complete PDSCH data of the single PDCCH schedule at the terminal side, namely the complete PDSCH data of the single PDCCH schedule is formed by the data transmitted by the multiple TRPs, and therefore, the receiving performance of the complete PDSCH data of the single PDCCH schedule is determined by the worst receiving performance of the data transmitted by the multiple TRPs at the terminal side according to the wooden barrel principle. Therefore, to improve the receiving performance of the terminal, the performance of all the TRPs participating in MTRP transmission needs to be improved to a certain extent, so as to ensure that the complete PDSCH data of the single PDCCH scheduling determined by the TRP with the worst receiving performance is improved.
In order to solve the above problems, an embodiment of the present application provides a data transmission method, applied to a base station side, where the method includes: performing layer mapping and coding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH to obtain n layers of coded data streams; n is a positive integer; transmitting the n-layer coded data stream to a terminal through a first transmission receiving point TRP, and transmitting an m-layer coded data stream in the encoded n-layer coded data stream to the terminal through a second TRP, wherein m is a positive integer; the terminal is located in an overlapping coverage area of the first TRP and the second TRP.
According to the data transmission method, after layer mapping and coding are carried out on PDSCH data scheduled by a single PDCCH to obtain n layers of coded data streams, a base station side sends the n layers of coded data streams to a terminal located in an overlapping coverage area of a first TRP and a second TRP through a first transmission receiving point TRP, and sends m layers of coded data streams in the n layers of coded data streams to the terminal located in the overlapping coverage area of the first TRP and the second TRP through the second TRP, namely, all n layers of coded data streams are distributed to the first TRP for transmission and at least one part of m layers of coded data streams in the n layers of coded data streams are distributed to the second TRP for transmission. Therefore, when the terminal receives the PDSCH, the terminal can only select the complete n-layer data sent by the first TRP to decode, if the decoding is incorrect, the data sent by the second TRP can be combined and finally decoded again, so that the receiving performance of the PDSCH on the UE side is improved.
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, as will be appreciated by those of ordinary skill in the art, in the various embodiments of the present application, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with 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 may be mutually combined and referred to without contradiction.
An aspect of the present invention provides a data transmission method, which is applied to a base station and applied to a process of transmitting PDSCH data scheduled by a single PDCCH based on MTRP. The flow is shown in fig. 1, and at least comprises the following steps:
step 101, performing layer mapping and coding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH to obtain n layers of coded data streams; n is a positive integer.
The present embodiment is not limited to the manner of layer mapping and encoding, and may be any type of layer mapping and encoding.
The n in the n-layer coded data stream is not specifically limited, but layer mapping based on PDSCH data that needs to be transmitted to the corresponding terminal by single PDCCH scheduling is a general term of the number of layers mapped to.
102, transmitting n layers of coded data streams to a terminal through a first transmission receiving point TRP, and transmitting m layers of coded data streams in the encoded n layers of coded data streams to the terminal through a second TRP, wherein m is a positive integer; the terminal is located in an overlapping coverage area of the first TRP and the second TRP.
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. In this embodiment, the PDSCH transmits n+m layer data through two TRPs, and it should be noted that each layer of the n+m layer data adopts different demodulation reference signals (Demodulation Reference Signal, DMRS), and the DMRS may be defined in a standard or may be DMRS of other design methods, which will not be described in detail herein.
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, for example, 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 TRP, a TRP having the highest signal power from among the TRPs covering at least one non-first TRP of the terminal a.
It should be further noted that, in the n-layer encoded data streams in this embodiment, the m-layer encoded data streams may be selected or arbitrarily selected according to requirements, where the m size may be selected or arbitrarily selected according to requirements, and the number of layers corresponding to the m-layer encoded data streams in the n-layer encoded data streams may also be selected or arbitrarily selected according to requirements; the m-layer coded data streams in the n-layer coded data streams may be pre-agreed by the base station side and the terminal side, for example, an m-layer coded data stream is formed by an encoded data stream with an odd number of layers in the n-layer coded data streams, or an m-layer coded data stream is formed by an encoded data stream with a pre-preset layer in the n-layer coded data streams.
It will be appreciated that when the m-layer encoded data streams of the n-layer encoded data streams are selected according to the need or arbitrarily selected, it is possible to flexibly select the data content to be repeatedly transmitted. In this case, since the terminal side decodes the data normally and accurately, the base station side also notifies the terminal of the correspondence between the m-layer coded data stream and the n-layer coded data stream. Based on this, in some embodiments, as shown in fig. 2, the data transmission method further includes:
and step 103, sending layer number information to the terminal, wherein the layer number information is used for indicating the corresponding layer number of the m-layer coded data stream in the n-layer coded data stream.
In this embodiment, the layer number information is sent to the terminal, so that the terminal may combine the received m-layer encoded data stream and the n-layer encoded data stream according to the layer number information, or the terminal may check the n-layer encoded data stream by using the m-layer encoded data stream according to the layer number information.
It should be noted that, the layer number information may be carried by an existing message, such as DCI or a higher layer parameter, so that the layer number information may be extended based on an existing protocol, which is beneficial to being compatible with the existing protocol and being extended subsequently, and a new message sending mechanism may be additionally created to send the layer number information.
In some examples, sending the layer number information to the terminal may be achieved by: downlink control information (Downlink Control Information, DCI) carrying layer number information in the extension information field is transmitted to the terminal. That is, the DCI needs to be extended to write layer number information in the extended information field. For example, when PDSCH is mapped to 8 layers through layers, an information field of length 8 bits is added to formats 1-1 and 1-2 of DCI, each bit being used to indicate whether a corresponding coded data stream is transmitted by the second TRP, i.e., when the data of the i-th bit is 1, it indicates that the i-th coded data stream in the n-th layer coded data is transmitted by the second TRP, and when the data of the i-th bit is 0, it indicates that the i-th coded data stream in the n-th layer coded data is not transmitted by the second TRP. Of course, other extension manners may be adopted, for example, the layer number information is additionally added to the header when the DCI is encapsulated, which will not be described in detail herein.
In other examples, sending the layer number information to the terminal may be achieved by: and sending the high-layer parameters carrying the layer number information to the terminal. The number of layers of information carried by the higher layer parameters is substantially similar to that of DCI, and will not be described in detail here.
The embodiment of the application also provides a data transmission method, which is applied to the terminal and applied to the process of transmitting the single PDCCH scheduling PDSCH based on MTRP. The flow is shown in fig. 3, and at least comprises the following steps:
step 301, receiving an n-layer coded data stream transmitted by a base station side through a first TRP and an m-layer coded data stream in the n-layer coded data stream transmitted by a second TRP; n and m are positive integers.
Step 302, decoding is performed according to the n-layer coded data stream and the m-layer coded data stream, so as to obtain PDSCH data scheduled by a single PDCCH.
In some examples, decoding from an n-layer coded data stream and an m-layer coded data stream to obtain single PDCCH scheduled PDSCH data may be implemented as follows: decoding the n-layer encoded data stream; verifying the decoding result of the n-layer coded data stream; under the condition that the decoding result verification of the n-layer coded data stream passes, determining that the decoding result of the n-layer coded data stream is PDSCH data scheduled by a single PDCCH; and under the condition that the decoding result verification of the n-layer coded data stream does not pass, combining the n-layer coded data stream and the m-layer coded data stream, decoding the combined result, under the condition that the decoding result verification of the combined result passes, taking the decoding result of the combined result as PDSCH data scheduled by a single PDCCH, and under the condition that the decoding result verification of the combined result does not pass, determining the decoding error.
In other examples, decoding according to the n-layer encoded data stream and the m-layer encoded data stream to obtain PDSCH data scheduled by a single PDCCH may also be implemented as follows: combining and decoding the n-layer coded data stream and the m-layer coded data stream; verifying the decoding result obtained by combining the n-layer coded data stream and the m-layer coded data stream; under the condition that the verification of the decoding result after the combination of the n-layer coded data stream and the m-layer coded data stream is passed, determining that the decoding result after the combination of the n-layer coded data stream and the m-layer coded data stream is PDSCH data scheduled by a single PDCCH; and decoding the n-layer coded data stream under the condition that the verification of the decoding result after the combination of the n-layer coded data stream and the m-layer coded data stream is not passed, taking the decoding result of the n-layer coded data stream as PDSCH data scheduled by a single PDCCH under the condition that the verification of the decoding result of the n-layer coded data stream is passed, and determining the decoding error under the condition that the verification of the decoding result of the n-layer coded data stream is not passed.
It should be noted that, in the above example, the combination of the n-layer encoded data stream and the m-layer encoded data stream may be implemented by equalization processing, demodulation, and soft bit combination, and other combination manners, such as hard combination, may also be adopted, which will not be described in detail herein.
It can be understood that, when the m-layer encoded data stream is selected according to the requirement or arbitrarily selected, in order to ensure that the terminal side can completely and accurately decode, the terminal needs the corresponding layer number of the m-layer encoded data stream in the n-layer encoded data stream. Based on this, in some embodiments, as shown in fig. 4, the data transmission method further includes:
step 303, receiving layer number information sent by the base station side, where the layer number information is used to indicate the corresponding layer number of the m-layer coded data stream in the n-layer coded data stream.
Accordingly, step 302 is implemented as follows: decoding is carried out according to the n-layer coded data stream and the m-layer coded data stream, and PDSCH data scheduled by a single PDCCH is obtained.
Specifically, the layer number information is mainly used for merging the n-layer coded data stream and the m-layer coded data stream.
Of course, when the m-layer coded data stream is pre-defined, the terminal can determine the layer number information according to the defined content, without additionally receiving the layer number information sent from the base station side, which will not be described in detail herein.
In order to facilitate a better understanding of the data transmission method provided by the above embodiments by those skilled in the art, the following description will take an interaction between the base station side and the terminal side as an example.
As shown in fig. 5, the data transmission method includes:
step 501, the base station side performs layer mapping and coding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH to obtain an n-layer coded data stream; n is a positive integer.
Step 502, the base station side sends n-layer coded data streams to the terminal through a first transmission receiving point TRP, and sends m-layer coded data streams in the encoded n-layer coded data streams to the terminal through a second TRP, wherein m is a positive integer.
In step 503, the terminal side receives the n-layer encoded data stream and the m-layer encoded data stream and decodes the n-layer encoded data stream and the m-layer encoded data stream to obtain PDSCH data scheduled by a single PDCCH.
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:
the mapping and encoding module 501 is configured to perform layer mapping and encoding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH, so as to obtain an n-layer encoded data stream; n is a positive integer.
A transmitting module 502, configured to transmit an n-layer encoded data stream to a terminal through a first transmission and reception point TRP, and transmit an m-layer encoded data stream in the encoded n-layer encoded data stream to the terminal through a second TRP, where m is a positive integer.
In some embodiments, the base station side device may further include another sending module, configured to send layer number information to the terminal, where the layer number information is used to indicate a corresponding layer number of the m-layer coded data stream in the n-layer coded data stream. In some examples, the sending of the layer number information to the terminal is implemented by sending DCI carrying the layer number information in the extended information field to the terminal, and in other examples, the sending of the layer number information to the terminal may also be implemented by sending a higher layer parameter carrying the layer number information to the terminal, which will not be described in detail herein.
In still other embodiments, the base station side device may further include a selection module for selecting a TRP accessed by the terminal as the first TRP and selecting a TRP satisfying the following condition as the second TRP: 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, and T is a preset power threshold.
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, elements that are not so close to solving the technical problem presented in the present application are not introduced in the present embodiment, but it does not indicate that other elements are not present in the present embodiment.
In another aspect, an embodiment of the present application further provides a terminal, as shown in fig. 6, including:
a receiving module 601, configured to receive an n-layer encoded data stream sent by a base station side through a first TRP and an m-layer encoded data stream in the n-layer encoded data stream sent by a second TRP; n and m are positive integers.
The decoding module 602 is configured to decode according to the n-layer encoded data stream and the m-layer encoded data stream, to obtain PDSCH data scheduled by a single PDCCH.
In some embodiments, the decoding module may include a first decoding submodule, a first validation submodule, a first determination submodule, a first merge decoding submodule, a second validation submodule, a second determination submodule, and a third determination submodule. The first decoding submodule is used for decoding the n-layer coded data stream; the first verification submodule is used for verifying the decoding result of the n-layer coded data stream; the first determining submodule is used for determining that the decoding result of the n-layer coded data stream is PDSCH data scheduled by a single PDCCH under the condition that the decoding result of the n-layer coded data stream passes verification; the first merging decoding sub-module is used for merging the n-layer coded data stream and the m-layer coded data stream and decoding the merging result under the condition that the decoding result of the n-layer coded data stream is verified to be not passed; the second verification sub-module is used for verifying the decoding result of the combined result; the second determining submodule is used for taking the decoding result of the combining result as PDSCH data scheduled by a single PDCCH under the condition that the decoding result verification of the combining result is passed; and the third determination submodule is used for determining the decoding error when the decoding result verification of the combined result is not passed.
In other embodiments, the decoding module may include: the second combined decoding submodule, the third verification submodule, the fourth determination submodule, the second decoding submodule, the fourth verification submodule, the fifth determination submodule and the sixth determination submodule. The second merging and decoding submodule is used for merging and decoding the n-layer coded data stream and the m-layer coded data stream; the third verification sub-module is used for verifying the decoding result obtained by combining the n-layer coded data stream and the m-layer coded data stream; the fourth determining submodule is used for determining that the decoding result after the combination of the n-layer coded data stream and the m-layer coded data stream is PDSCH data scheduled by a single PDCCH under the condition that the decoding result after the combination of the n-layer coded data stream and the m-layer coded data stream passes verification; the second decoding submodule is used for decoding the n-layer coded data stream under the condition that the decoding result verification after the n-layer coded data stream and the m-layer coded data stream are combined does not pass; the fourth verification sub-module is used for verifying the decoding result of the n-layer coded data stream; the fifth determining submodule is used for taking the decoding result of the n-layer coded data stream as PDSCH data scheduled by a single PDCCH under the condition that the decoding result of the n-layer coded data stream passes verification; and the sixth determining submodule is used for determining the decoding error when the decoding result of the n-layer coded data stream is verified to be not passed.
In still other embodiments, the terminal further includes another receiving module, configured to receive layer number information sent by the base station side, where the layer number information is used to indicate a corresponding layer number of the m-layer coded data stream in the n-layer coded data stream. Correspondingly, the decoding module obtains single PDCCH scheduled PDSCH data by decoding according to the n-layer coded data stream, the m-layer coded data stream and the layer number information, so as to realize decoding according to the n-layer coded data stream and the m-layer coded data stream, and obtain single PDCCH scheduled PDSCH data.
It is to be noted that this embodiment is a terminal 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, elements that are not so close to solving the technical problem presented in the present application are not introduced in the present embodiment, but it does not indicate that other elements are not present in the present embodiment.
Another aspect of the embodiments of the present application further provides a network device, as shown in fig. 7, including: at least one processor 701; and a memory 702 communicatively coupled to the at least one processor 701; the memory 702 stores instructions executable by the at least one processor 701, the instructions being executable by the at least one processor 701 to enable the at least one processor 701 to perform the data transmission method described in any one of the method embodiments described above.
Where memory 702 and processor 701 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 701 and memory 702 together. 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 701 is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor 701.
The processor 701 is responsible for managing the bus and general processing and may provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 702 may be used to store data used by processor 701 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 data transmission 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 described herein. 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 embodiments in which the present application is implemented and that various changes in form and details may be made therein without departing from the spirit and scope of the present application.

Claims (12)

1. A data transmission method, applied to a base station side, comprising:
performing layer mapping and coding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH to obtain n layers of coded data streams; n is a positive integer;
transmitting the n-layer coded data stream to a terminal through a first transmission receiving point TRP, and transmitting an m-layer coded data stream in the encoded n-layer coded data stream to the terminal through a second TRP, wherein m is a positive integer; the terminal is located in an overlapping coverage area of the first TRP and the second TRP.
2. The data transmission method according to claim 1, characterized in that the method further comprises:
and sending layer number information to the terminal, wherein the layer number information is used for indicating the corresponding layer number of the m-layer coded data stream in the n-layer coded data stream.
3. The data transmission method according to claim 2, wherein the transmitting the layer number information to the terminal includes:
transmitting downlink control information DCI carrying the layer number information in an extended information domain to the terminal; or alternatively
And sending the high-layer parameters carrying the layer number information to the terminal.
4. A data transmission method according to any one of claims 1 to 3, characterized in that the first TRP is a TRP to which the terminal is accessing; 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.
5. A data transmission method, applied to a terminal side, comprising:
receiving an n-layer coded data stream transmitted by a base station through a first TRP and an m-layer coded data stream in the n-layer coded data stream transmitted through a second TRP; n and m are positive integers;
and decoding according to the n-layer coded data stream and the m-layer coded data stream to obtain PDSCH data scheduled by a single PDCCH.
6. The data transmission method according to claim 5, wherein decoding the n-layer encoded data stream and the m-layer encoded data stream to obtain single PDCCH scheduled PDSCH data includes:
decoding the n-layer encoded data stream;
verifying the decoding result of the n-layer coded data stream;
under the condition that the decoding result verification of the n-layer coded data stream passes, determining that the decoding result of the n-layer coded data stream is PDSCH data scheduled by the single PDCCH;
and when the decoding result verification of the n-layer coded data stream is not passed, combining the n-layer coded data stream and the m-layer coded data stream, decoding the combined result, taking the decoding result of the combined result as PDSCH data scheduled by the single PDCCH when the decoding result verification of the combined result is passed, and determining the decoding error when the decoding result verification of the combined result is not passed.
7. The data transmission method according to claim 5, wherein decoding the n-layer encoded data stream and the m-layer encoded data stream to obtain single PDCCH scheduled PDSCH data includes:
merging and decoding the n-layer coded data stream and the m-layer coded data stream;
verifying a decoding result obtained by combining the n-layer coded data stream and the m-layer coded data stream;
under the condition that the decoding result after the n-layer coded data stream and the m-layer coded data stream are combined passes verification, determining that the decoding result after the n-layer coded data stream and the m-layer coded data stream are combined is PDSCH data scheduled by the single PDCCH;
and decoding the n-layer coded data stream under the condition that the decoding result verification of the n-layer coded data stream and the m-layer coded data stream is not passed, taking the decoding result of the n-layer coded data stream as the PDSCH data scheduled by the single PDCCH under the condition that the decoding result verification of the n-layer coded data stream is passed, and determining the decoding error under the condition that the decoding result verification of the n-layer coded data stream is not passed.
8. The data transmission method according to any one of claims 5 to 7, wherein before decoding according to the n-layer coded data stream and the m-layer coded data stream to obtain PDSCH data scheduled by a single PDCCH, the method further comprises:
receiving layer number information sent by the base station side, wherein the layer number information is used for indicating the corresponding layer number of the m-layer coded data stream in the n-layer coded data stream;
decoding according to the n-layer coded data stream and the m-layer coded data stream to obtain single PDCCH scheduled PDSCH data, including:
and decoding according to the n-layer coded data stream, the m-layer coded data stream and the layer number information to obtain the PDSCH data scheduled by the single PDCCH.
9. A base station side apparatus characterized by comprising:
the mapping and coding module is used for carrying out layer mapping and coding on physical downlink shared channel PDSCH data scheduled by a single physical downlink control channel PDCCH to obtain n layers of coded data streams; n is a positive integer;
a transmitting module, configured to transmit the n-layer encoded data stream to a terminal through a first transmission and reception point TRP, and transmit m-layer encoded data streams in the n-layer encoded data stream after being encoded to the terminal through a second TRP, where m is a positive integer; the terminal is located in an overlapping coverage area of the first TRP and the second TRP.
10. A terminal, comprising:
a receiving module, configured to receive an n-layer encoded data stream sent by a base station side through a first TRP and an m-layer encoded data stream in the n-layer encoded data stream sent by a second TRP; n and m are positive integers;
and the decoding module is used for decoding according to the n-layer coded data stream and the m-layer coded data stream to obtain PDSCH data scheduled by a single PDCCH.
11. 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 data transmission method according to any one of claims 1 to 4 or to perform the data transmission method according to any one of claims 5 to 8.
12. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the data transmission method according to any one of claims 1 to 4 or the data transmission method according to any one of claims 5 to 8.
CN202210653619.7A 2022-06-09 2022-06-09 Data transmission method, terminal, device and storage medium Pending CN117279029A (en)

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US11516882B2 (en) * 2018-09-28 2022-11-29 Apple Inc. Downlink control for non coherent joint transmission
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