CN110519030B - Auxiliary link data transmission method and device and user equipment - Google Patents

Auxiliary link data transmission method and device and user equipment Download PDF

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CN110519030B
CN110519030B CN201910757515.9A CN201910757515A CN110519030B CN 110519030 B CN110519030 B CN 110519030B CN 201910757515 A CN201910757515 A CN 201910757515A CN 110519030 B CN110519030 B CN 110519030B
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sci
pssch
time
frequency domain
psschs
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CN110519030A (en
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曲鑫
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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

Abstract

The invention provides a method and a device for transmitting auxiliary link data and user equipment. The method comprises the following steps: and receiving SCI (single context indication channel) carried by the PSCCH currently transmitted, wherein the SCI comprises time-frequency domain indication information of a plurality of PSSCHs, and decoding the plurality of PSSCHs or only decoding one PSSCH according to the time-frequency domain indication information in the SCI and other transmission parameters. The invention can flexibly select to decode a plurality of PSSCH according to one PSCCH or only decode one PSSCH according to the actual service requirement, thereby improving the reliability of system transmission and reducing the signaling overhead.

Description

Auxiliary link data transmission method and device and user equipment
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting auxiliary link data, and a user equipment.
Background
With the development of 3GPP (3rd Generation Partnership Project), NR (New Radio, New wireless or New air interface) V2X (Vehicle to outside information exchange) is being studied as a key technical direction of R16(Release 16) version. The enhancement of NR V2X as an LTE (Long Term Evolution) V2X technology is a key technology means to enable a vehicle network.
NR V2X supports two resource allocation approaches: mode 1(mode1) and mode 2(mode 2). The mode2 also supports a Blind Retransmission (Blind Retransmission) and HARQ (Hybrid Automatic Repeat reQuest) feedback mechanism. In order to further improve the reliability of mode2 resource allocation, 3GPP has already agreed through discussion, and both transmission based on blind retransmission and transmission based on hybrid automatic repeat request support a resource reservation mechanism, that is, a time-frequency resource reservation for subsequent psch data transmission is included in a Control signaling SCI (Sidelink Control Information) of primary psch (Physical Sidelink Shared Channel) data transmission, and the subsequent psch and the secondary psch transmission correspond to the same TB (Transport Block).
However, in order to further improve the reliability of mode2 transmission, the reliability of the Control signaling SCI should be improved, that is, when the PSCCH (Physical downlink Control Channel) corresponding to one PSCCH transmission is not decoded correctly, the PSCCH corresponding to other PSCCH transmissions may be decoded.
In LTE D2D (Device-to-Device, end-to-end), the same TB supports up to three times of blind retransmissions of the PSCCH, the three times of blind retransmissions are sent on consecutive subframes in the time domain, the frequency domain adopts a frequency hopping scheme, and the PSCCH transmitted for the first time is associated with two PSCCHs that have the same content and are repeatedly sent, so long as the UE is received to successfully decode at least one of the two PSCCHs, or the combination decoding is successful, the necessary information for successful decoding of the PSCCH transmitted for the first time can be obtained, the time domain information transmitted for the second and third PSCCHs can be obtained by offsetting the subframe where the PSCCH transmitted for the first time is located, the frequency domain resource information can be obtained by adding a frequency hopping interval to the subframe where the PSCCH transmitted for the first time is located, and other transmission parameters except for the time-frequency domain resource are the same as those transmitted for the first time.
In LTE V2X, the same TB supports at most two blind retransmissions of the PSSCH, which may not be continuous in the time domain, and may select any interval in the frequency domain according to the resource sensing result. The two times of blind retransmission of the PSSCH are associated with two PSCCHs with different contents, and the necessary information for successful decoding of the two times of transmitted PSSCHs can be obtained as long as at least one of the two PSCCHs is decoded. The SCI includes a 1-bit retransmission Indication, and when the Value is 0, the SCI indicates that the PSCCH is currently the first PSCCH, the first PSCCH includes frequency domain information RIV (Resource Indication Value) of the PSCCH transmitted for the second time, that is, a frequency domain starting position and a length, frequency domain lengths of the PSCCHs transmitted for two times are the same, a subchannel number of the frequency domain starting position transmitted for the first time is consistent with a subchannel number of the first PSCCH, and the frequency domain starting position of the PSCCH transmitted for the first time can be obtained. The primary transmitted PSSCH is in the same time slot as the first PSCCH, and the time interval between the secondary transmission and the primary transmitted PSSCH is indicated by 4 bits in SCI, so that the time domain position of the two transmissions can be obtained. Similarly, when the retransmission indication is 1, it indicates that the current PSCCH is the second PSCCH, and the time domain positions of two transmissions can be obtained according to the time-frequency domain information included in the second PSCCH. The other necessary information of SCI carried by the two PSCCHs for successfully decoding the PSCCH is the same.
At present, in NR V2X, only a time-frequency resource reservation scheme for multiple pschs transmission is provided for the same TB, which cannot meet the requirement of decoding multiple pschs according to one PSCCH, and the reliability of system transmission is not high.
Disclosure of Invention
The auxiliary link data transmission method, the device and the user equipment can flexibly select to decode a plurality of PSSCH according to one PSCCH or only decode one PSSCH according to the actual service requirement, thereby improving the reliability of system transmission and reducing the signaling overhead.
In a first aspect, the present invention provides a method for transmitting data in a secondary link, including:
receiving SCI (sequence information indicator) carried by PSCCH (Primary common control channel) currently transmitted, wherein the SCI comprises time-frequency domain indication information of a plurality of PSSCHs (primary common control channels);
and decoding a plurality of PSSCHs or only one PSSCH according to the time-frequency domain indication information and other transmission parameters in the SCI.
Optionally, the decoding a plurality of pschs or only one psch according to the time-frequency domain indication information and other transmission parameters in the SCI includes:
determining whether a plurality of PSSCHs can be decoded according to the SCI;
when the plurality of PSSCHs can be decoded according to the SCI, decoding the plurality of PSSCHs according to time-frequency domain indication information in the SCI and other transmission parameters;
when it is determined that multiple PSSCHs cannot be coded according to the SCI, only one PSSCH is coded according to time-frequency domain indication information in the SCI and other transmission parameters.
Optionally, the determining whether the plurality of PSSCHs can be decoded according to the SCI includes: when PSSCH blind retransmission reception is confirmed, determining that a plurality of PSSCHs can be decoded according to the SCI; otherwise, it is determined that multiple PSSCHs may not be coded according to the SCI.
Optionally, the determining whether the plurality of PSSCHs can be decoded according to the SCI includes: when an indication to decode a plurality of PSSCHs with one SCI is received, deciding that the plurality of PSSCHs can be decoded according to the SCI; otherwise, it is determined that multiple PSSCHs may not be coded according to the SCI.
Optionally, the decoding the plurality of PSSCHs according to the time-frequency domain resource indication information in the SCI and other transmission parameters comprises:
and decoding a current PSSCH and at least one subsequently received PSSCH according to the time-frequency domain resource indication information and other transmission parameters in the SCI, wherein the current PSSCH is a PSSCH which is in the same time unit as the SCI, the time-frequency domain position of the current PSSCH is determined according to the time-frequency domain resource indication information in the SCI, the at least one subsequently received PSSCH is a PSSCH which has at least one time unit interval behind the time unit where the SCI is located, the time-frequency domain position of the at least one subsequently received PSSCH is determined according to the time-frequency domain resource indication information in the SCI, the current PSSCH and the at least one subsequently received PSSCH transmit the same transport block TB, and the time unit is a minimum time unit configured by a secondary link resource pool.
Optionally, the decoding the plurality of pschs according to the time-frequency domain resource indication information in the SCI and other transmission parameters further comprises: and decoding the at least one PSSCH which is received before according to the time-frequency domain resource indication information in the SCI and other transmission parameters, wherein the at least one PSSCH which is received before is a PSSCH with at least one time unit interval before the time unit of the SCI, the time-frequency domain position of the PSSCH is determined according to the time-frequency domain resource indication information in the SCI, and the current PSSCH and the at least one PSSCH which is received before send the same transport block TB.
Optionally, decoding only one pscch according to the time-frequency domain indication information in the SCI and other transmission parameters comprises: and decoding the current PSSCH according to the time-frequency domain resource indication information in the SCI and other transmission parameters, wherein the current PSSCH is the PSSCH which is in the same time unit with the SCI, and the time-frequency domain position of the current PSSCH is obtained according to the time-frequency domain resource indication information in the SCI, and the time unit is the minimum time unit configured by the auxiliary link resource pool.
Optionally, the other transmission parameters include at least RV, MCS, antenna ports, DMRS sequence initialization, and DMRS pattern.
In a second aspect, the present invention provides an apparatus for transmitting data in a secondary link, including:
a receiving unit, configured to receive an SCI carried by a currently transmitted PSCCH, where the SCI includes time-frequency domain indication information of multiple pschs;
and the decoding unit is used for decoding a plurality of PSSCHs or only one PSSCH according to the time-frequency domain indication information and other transmission parameters in the SCI.
Optionally, the coding unit comprises:
the judging module is used for judging whether a plurality of PSSCHs can be decoded according to the SCI;
a first decoding module, configured to decode the PSSCHs according to the time-frequency domain indication information in the SCI and other transmission parameters when the determining module determines that the PSSCHs can be decoded according to the SCI;
a second decoding module for decoding only one PSSCH according to the time-frequency domain indication information and other transmission parameters in the SCI when the judging module judges that the PSSCHs cannot be decoded according to the SCI
Optionally, the determining module is configured to determine that multiple pschs can be decoded according to the SCI when receiving PSSCH blind retransmission is determined; otherwise, it is determined that multiple PSSCHs may not be coded according to the SCI.
Optionally, the determining module is configured to determine that the plurality of pschs can be decoded according to one SCI when receiving an indication of decoding the plurality of pschs using the one SCI; otherwise, it is determined that multiple PSSCHs may not be coded according to the SCI.
Optionally, the first decoding module is configured to decode a current PSSCH and at least one subsequently received PSSCH according to time-frequency domain resource indication information in the SCI and other transmission parameters, where the current PSSCH is a PSSCH that is in a same time unit as the SCI, a time-frequency domain position of the PSSCH is determined according to the time-frequency domain resource indication information in the SCI, the at least one subsequently received PSSCH is a PSSCH that has at least one time unit interval after a time unit in which the SCI is located, a time-frequency domain position of the PSSCH is determined according to the time-frequency domain resource indication information in the SCI, and the current PSSCH and the at least one subsequently received PSSCH send a same transport block TB, where the time unit is a minimum time unit configured by a secondary link resource pool.
Optionally, the first decoding module is further configured to decode at least one PSSCH that has been received before according to the time-frequency domain resource indication information in the SCI and other transmission parameters, where the at least one PSSCH that has been received before is a PSSCH that has at least one time unit interval before the time unit where the SCI is located, and a time-frequency domain position of the at least one PSSCH is determined according to the time-frequency domain resource indication information in the SCI, and the current PSSCH and the at least one PSSCH that has been received before send the same transport block TB.
Optionally, the second decoding module is configured to decode a current PSSCH according to the time-frequency domain resource indication information in the SCI and other transmission parameters, where the current PSSCH is a PSSCH in a same time unit as the SCI, and a time-frequency domain position of the current PSSCH is obtained according to the time-frequency domain resource indication information in the SCI, where the time unit is a minimum time unit configured by the secondary link resource pool.
Optionally, the other transmission parameters include at least RV, MCS, antenna ports, DMRS sequence initialization, and DMRS pattern.
In a third aspect, the present invention provides a user equipment, where the user equipment includes the above secondary link data transmission apparatus.
According to the method, the device and the user equipment for transmitting the secondary link data, the SCI (received by the UE) carried by the PSCCH currently transmitted comprises the time-frequency domain indication information of the PSSCHs, and the PSSCHs can be decoded or only one PSSCH can be decoded according to the time-frequency domain indication information in the SCI and other transmission parameters, so that the PSSCHs can be flexibly selected to be decoded or only one PSSCH can be decoded according to one PSSCH according to actual service requirements, the transmission reliability of a system is improved, and the signaling overhead is reduced.
Drawings
Fig. 1 is a flowchart of a method for transmitting data of a secondary link according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating decoding of a current psch and a subsequent psch according to an SCI carried by a currently transmitted PSCCH according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of decoding a current psch, a previous psch, and a subsequent psch according to an SCI carried by a currently transmitted PSCCH according to embodiment 2 of the present invention;
fig. 4 is a schematic diagram of decoding only the current PSCCH according to the SCI carried by the currently transmitted PSCCH according to embodiment 3 of the present invention;
fig. 5 is a schematic structural diagram of a secondary link data transmission apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a secondary link data transmission apparatus according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for transmitting auxiliary link data, where the method is applied to a UE, and as shown in fig. 1, the method includes:
and S11, receiving SCI carried by the PSCCH transmitted currently, wherein the SCI comprises time-frequency domain indication information of a plurality of PSSCHs.
S12, decoding multiple PSSCHs or only one PSSCH according to the time-frequency domain indication information in the SCI and other transmission parameters.
Specifically, it may be determined whether the multiple pschs may be decoded according to the SCI, and when it is determined that the multiple pschs may be decoded according to the SCI, the multiple pschs may be decoded according to time-frequency domain indication information and other transmission parameters in the SCI; when it is determined that multiple PSSCHs cannot be coded according to the SCI, only one PSSCH is coded according to time-frequency domain indication information in the SCI and other transmission parameters.
According to the method for transmitting the secondary link data, the SCI borne by the currently transmitted PSCCH received by the UE comprises the time-frequency domain indication information of the PSSCHs, the PSSCHs can be decoded or only one PSSCH can be decoded according to the time-frequency domain indication information in the SCI and other transmission parameters, so that the PSSCHs can be flexibly selected to be decoded or only one PSSCH can be decoded according to one PSCCH according to actual service requirements, the reliability of system transmission is improved, and the signaling overhead is reduced.
The method for transmitting data of the secondary link according to the present invention is described in detail with reference to the following embodiments.
When the SCI comprises time-frequency domain indication information of a plurality of PSSCHs, the UE judges whether the plurality of PSSCHs can be decoded according to one SCI, and when the judgment is yes, the plurality of PSSCHs are decoded according to the time-frequency domain indication information indicated in the SCI and other transmission parameters; when the determination is negative, only one PSSCH is coded according to the time-frequency domain indication information and other transmission parameters indicated in the SCI.
Specifically, the determination condition for determining whether multiple PSSCHs can be decoded according to one SCI may be: when the UE confirms to carry out PSSCH blind retransmission receiving, judging that a plurality of PSSCHs can be decoded according to one SCI; otherwise, it is decided that multiple PSSCHs may not be decoded according to one SCI.
The method for judging whether PSSCH blind retransmission is carried out comprises the following steps:
(1) receiving whether the configuration or the pre-configuration according to the service type is blind retransmission;
(2) receiving and sending whether UE is configured to be blind retransmission through PC5RRC signaling;
(3) receiving an indication in the SCI whether the transmission is a blind retransmission;
(4) the receiving MAC CE indicates whether the transmission is a blind retransmission.
Optionally, the condition for determining whether multiple PSSCHs can be decoded according to one SCI may be: when the UE receives an indication of decoding a plurality of PSSCHs by using one SCI, the UE judges that the plurality of PSSCHs can be decoded according to the one SCI; otherwise, it is decided that multiple PSSCHs may not be decoded according to one SCI.
The indication method may be:
(1) receiving whether a plurality of PSSCHs can be decoded by using one SCI or not according to service type configuration or pre-configuration;
(2) receiving whether the sending UE can decode a plurality of PSSCHs by utilizing one SCI through PC5RRC signaling configuration;
(3) receiving 1 bit in SCI to indicate whether the transmission can decode multiple PSSCHs by using one SCI;
(4) the receiving MAC CE indicates whether the transmission is a blind retransmission.
When the UE decodes a plurality of PSSCHs according to one SCI, the PSSCH contains a current PSSCH which is the PSSCH in the same time unit with the SCI; the system also comprises at least one PSSCH received subsequently, wherein the at least one PSSCH received subsequently is a PSSCH with at least one time unit interval behind the time unit of the SCI; at least one PSSCH that has been previously received may also be included, the at least one PSSCH that has been previously received being a PSSCH that has at least one time unit interval before the time unit in which the SCI is located. The time-frequency domain indication information of the multiple PSSCHs and all other information for decoding the PSSCH except the time-frequency domain indication information can be obtained from the SCI at this time.
When the UE decodes only one PSSCH according to one SCI, only the current PSSCH is included, wherein the current PSSCH is the PSSCH in the same time unit as the SCI. At this time, the SCI includes time-domain indication information of a plurality of pschs, and the SCI includes only all other information for decoding the pschs of the current psch except the time-domain indication information.
Example 1
In this embodiment, the UE determines that multiple pschs can be decoded according to one SCI according to the above determination condition, and in this embodiment, the UE can decode the current psch and the subsequent psch according to one SCI.
The necessary information included in the SCI carried by the PSCCH for successfully decoding the PSCCH at least includes a time-frequency domain resource indication, an RV (Redundancy Version), an MCS (Modulation and Coding Scheme), an antenna port, a DMRS (Demodulation Reference Signal) sequence initialization, and a DMRS pattern, and may further include other necessary information required by subsequent 3GPP discussions. As shown in fig. 2, the PSCCH transmitted for the first time includes information necessary for successful decoding of the PSCCH transmitted for the first time and also includes information necessary for successful decoding of the PSCCH transmitted for the second time. The time-frequency domain indication mode can adopt the following modes:
the time unit of the first PSSCH is determined through the same time unit as the first PSCCH, a time interval is indicated in the SCI, and the time unit of the second PSCCH can be determined through the time unit of the PSCCH plus the time interval. And determining the sub-channel identifier of the starting position of the frequency domain of the first PSSCH according to the sub-channel identifier of the starting position of the frequency domain of the first PSCCH. The frequency domain starting position and the length of the second PSCCH are indicated in the SCI in a RIV mode, and the first PSCCH and the second PSCCH adopt the same frequency domain length. The RV of the first PSSCH is indicated in the SCI, and the RV of the second PSSCH is cyclically obtained according to a configured RV pattern, such as '0, 2, 3, 1', or '0, 3, 0, 3', or '0, 0, 0'. The MCS, antenna port, DMRS sequence initialization and DMRS pattern of the first psch are indicated in the SCI, and the MCS, antenna port, DMRS sequence initialization and DMRS pattern of the second psch are the same as the first psch.
By the method of the embodiment, when the second PSCCH corresponding to the second transmission fails to be decoded, the second PSCCH can still be decoded according to the first PSCCH, so that the reliability is improved, and the signaling overhead of the first PSCCH is not increased. Similarly, a third transmission may be indicated by a second transmission.
Example 2
In this embodiment, the UE determines that multiple pschs can be decoded according to one SCI according to the above determination condition, and in this embodiment, the UE can decode a previous psch, a current psch, and a subsequent psch according to one SCI.
The necessary information contained in the SCI carried by the PSCCH for successfully decoding the PSCCH at least includes a time-frequency domain resource indication, an RV, an MCS, an antenna port, a DMRS sequence initialization, and a DMRS pattern, and may further contain other necessary information required by the subsequent 3GPP discussion. As shown in fig. 3, the PSCCH transmitted for the second time includes necessary information for successful decoding of the PSCCH transmitted for the second time, and also includes necessary information for successful decoding of the PSCCHs transmitted for the first and third times. The time-frequency domain indication mode can adopt the following modes:
the time unit of the second PSSCH is determined by the same time unit of the second PSCCH, the SCI indicates two time intervals, one is the time interval T1 between the current transmission and the previous transmission, and the other is the time interval T2 between the current transmission and the next transmission, the time unit of the first PSCCH can be determined by subtracting the time interval T1 from the time unit of the PSCCH, and the time unit of the third PSCCH can be determined by adding the time interval T2 to the time unit of the PSCCH. And determining the identifier of the sub-channel of the starting position of the frequency domain of the second PSSCH according to the identifier of the sub-channel of the starting position of the frequency domain of the second PSCCH. The frequency domain starting positions and lengths of the two PSCCHs are indicated in the SCI in an RIV mode, the same frequency domain length is respectively adopted for the first PSSCH and the third PSSCH, and the same frequency domain length is adopted for the second PSCCH and the third PSCCH. The RV of the second PSSCH is indicated in the SCI, and the RVs of the first PSSCH and the third PSSCH are cyclically obtained according to a configured RV pattern, such as '0, 2, 3, 1', or '0, 3, 0, 3', or '0, 0, 0, 0'. The MCS, antenna port, DMRS sequence initialization and DMRS pattern of the second psch are indicated in the SCI, and the MCS, antenna port, DMRS sequence initialization and DMRS pattern of the first psch and the third psch are the same as the second psch.
By the method of the embodiment, when the decoding of the first PSCCH corresponding to the first transmission fails, the first PSCCH can still be decoded according to the PSCCH transmitted for the second time; when the third PSCCH corresponding to the third transmission fails to be decoded, the third PSCCH may still be decoded according to the PSCCH of the second or fourth transmission. Compared with embodiment 1, this embodiment indicates more previous transmissions, which may further improve reliability, but correspondingly increases a part of the signaling overhead of time-frequency domain resource indication. Similarly, other secondary transmission indications may be obtained.
Example 3
In this embodiment, the UE determines that only one PSCCH, i.e. the current PSCCH, can be decoded according to one SCI according to the above determination condition.
The necessary information contained in the SCI carried by the PSCCH for successfully decoding the PSCCH at least includes a time-frequency domain resource indication, an RV, an MCS, an antenna port, a DMRS sequence initialization, and a DMRS pattern, and may further contain other necessary information required by the subsequent 3GPP discussion. As shown in fig. 4, the PSCCH transmitted for the first time includes necessary information for successful decoding of the PSCCH transmitted for the first time, and also includes time-frequency domain indication information of the PSCCH for the second time for resource reservation, but does not include other necessary information for successful decoding of the PSCCH for the second time. The time-frequency domain indication mode can adopt the following modes:
the time unit of the first PSSCH is determined through the same time unit as the first PSCCH, a time interval is indicated in the SCI, and the time unit of the second PSCCH can be determined through the time unit of the PSCCH plus the time interval. And determining the sub-channel identifier of the starting position of the frequency domain of the first PSSCH according to the sub-channel identifier of the starting position of the frequency domain of the first PSCCH. The frequency domain starting position and the length of the second PSCCH are indicated in the SCI in a RIV mode, and the first PSCCH and the second PSCCH adopt the same frequency domain length. The SCI indicates only RV, MCS, antenna port, DMRS sequence initialization and DMRS pattern of the first psch and cannot be used for second psch decoding. At this time, when the second PSCCH decoding fails, decoding cannot be performed according to the first PSCCH, but the scheme may be combined based on the HARQ feedback mechanism, and at this time, ACK and NACK are not fed back, the transmitting end may determine DTX (Discontinuous Transmission), further retransmit PSCCH and PSCCH, and improve reliability depending on the HARQ feedback mechanism.
An embodiment of the present invention further provides an apparatus for transmitting data of an auxiliary link, where the apparatus is located in a UE, and as shown in fig. 5, the apparatus includes:
a receiving unit 11, configured to receive an SCI carried by a currently transmitted PSCCH, where the SCI includes time-frequency domain indication information of multiple pschs;
a decoding unit 12, configured to decode multiple pschs or only one psch according to the time-frequency domain indication information in the SCI and other transmission parameters.
According to the auxiliary link data transmission device provided by the embodiment of the invention, the received SCI carried by the currently transmitted PSCCH comprises the time-frequency domain indication information of a plurality of PSSCHs, and the plurality of PSSCHs or only one PSSCH can be decoded according to the time-frequency domain indication information in the SCI and other transmission parameters, so that the plurality of PSSCHs or only one PSSCH can be flexibly selected to be decoded according to one PSCCH according to actual service requirements, thereby improving the reliability of system transmission and reducing the signaling overhead.
Further, as shown in fig. 6, the coding unit 12 includes:
a determining module 121, configured to determine whether multiple PSSCHs can be decoded according to the SCI;
a first decoding module 122, configured to decode the pschs according to the time-frequency domain indication information in the SCI and other transmission parameters when the determining module 121 determines that the pschs can be decoded according to the SCI;
a second decoding module 123, configured to, when the determining module 121 determines that the plurality of pschs may not be decoded according to the SCI, decode only one psch according to the time-frequency domain indication information in the SCI and other transmission parameters.
Optionally, the determining module 121 is configured to determine that multiple PSSCHs can be decoded according to the SCI when receiving PSSCH blind retransmission is confirmed; otherwise, it is determined that multiple PSSCHs may not be coded according to the SCI.
Optionally, the determining module 121 is configured to determine that a plurality of pschs can be decoded according to one SCI when receiving an indication of decoding the plurality of pschs by using the SCI; otherwise, it is determined that multiple PSSCHs may not be coded according to the SCI.
Optionally, the first decoding module 122 is configured to decode a current PSSCH and at least one subsequently received PSSCH according to time-frequency domain resource indication information in the SCI and other transmission parameters, where the current PSSCH is a PSSCH that is in a same time unit as the SCI, a time-frequency domain position of the PSSCH is determined according to the time-frequency domain resource indication information in the SCI, the at least one subsequently received PSSCH is a PSSCH that has at least one time unit interval after the time unit in which the SCI is located, a time-frequency domain position of the PSSCH is determined according to the time-frequency domain resource indication information in the SCI, and the current PSSCH and the at least one subsequently received PSSCH send a same transport block TB, where the time unit is a minimum time unit configured by the secondary link resource pool.
Optionally, the first decoding module 122 is further configured to decode at least one previously received psch according to the time-frequency-domain resource indication information in the SCI and other transmission parameters, where the at least one previously received psch is a psch having at least one time unit interval before a time unit where the SCI is located, and a time-frequency-domain position of the psch is determined according to the time-frequency-domain resource indication information in the SCI, and the current psch and the at least one previously received psch send the same transport block TB.
Optionally, the second decoding module 123 is configured to decode a current PSSCH according to the time-frequency domain resource indication information in the SCI and other transmission parameters, where the current PSSCH is a PSSCH in the same time unit as the SCI, and a time-frequency domain position of the current PSSCH is obtained according to the time-frequency domain resource indication information in the SCI, where the time unit is a minimum time unit configured by the secondary link resource pool. Optionally, the other transmission parameters include at least RV, MCS, antenna ports, DMRS sequence initialization, and DMRS pattern.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
The embodiment of the invention also provides the user equipment, and the user equipment comprises the auxiliary link data transmission device.
It will be understood by those skilled in the art that all or part of the processes of the embodiments of the methods described above may be implemented by a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A method for transmitting data of a secondary link is characterized by comprising the following steps:
receiving secondary link control information (SCI) carried by a currently transmitted secondary link physical layer control channel (PSCCH), wherein the SCI comprises time-frequency domain indication information of a plurality of secondary link physical layer shared channels (PSSCHs);
decoding a plurality of PSSCHs or only one PSSCH according to the time-frequency domain indication information and other transmission parameters in the SCI;
the decoding of multiple PSSCHs or only one PSSCH according to time-frequency domain indication information and other transmission parameters in the SCI comprises: determining whether a plurality of PSSCHs can be decoded according to the SCI; when the plurality of PSSCHs can be decoded according to the SCI, decoding the plurality of PSSCHs according to time-frequency domain indication information in the SCI and other transmission parameters; when the plurality of PSSCHs cannot be decoded according to the SCI, only one PSSCH is decoded according to time-frequency domain indication information in the SCI and other transmission parameters, wherein the other transmission parameters at least comprise Redundancy Version (RV), Modulation and Coding Strategy (MCS), antenna ports, demodulation reference signal (DMRS) sequence initialization and DMRS patterns;
the determining whether a plurality of PSSCHs can be decoded according to the SCI comprises: when PSSCH blind retransmission reception is confirmed, determining that a plurality of PSSCHs can be decoded according to the SCI; otherwise, it is determined that multiple PSSCHs may not be coded according to the SCI.
2. The method of claim 1 wherein the coding of the PSSCHs according to the time-frequency domain resource indication information in the SCI and other transmission parameters comprises:
and decoding the current PSSCH and at least one subsequently received PSSCH according to the time-frequency domain resource indication information and other transmission parameters in the SCI, wherein the current PSSCH is a PSSCH which is positioned in the same time unit as the SCI, the time-frequency domain position of the current PSSCH is determined according to the time-frequency domain resource indication information in the SCI, the at least one subsequently received PSSCH is a PSSCH which has at least one time unit interval after the time unit where the SCI is positioned, the time-frequency domain position of the at least one subsequently received PSSCH is determined according to the time-frequency domain resource indication information in the SCI, and the current PSSCH and the at least one subsequently received PSSCH transmit the same transport block TB, wherein the time unit is the minimum time unit configured by a secondary link resource pool.
3. The method of claim 2 wherein the coding of the PSSCHs according to the time-frequency domain resource indication information in the SCI and other transmission parameters further comprises: and decoding the at least one PSSCH which is received before according to the time-frequency domain resource indication information in the SCI and other transmission parameters, wherein the at least one PSSCH which is received before is a PSSCH with at least one time unit interval before the time unit of the SCI, the time-frequency domain position of the PSSCH is determined according to the time-frequency domain resource indication information in the SCI, and the current PSSCH and the at least one PSSCH which is received before send the same transport block TB.
4. The method of claim 1 wherein the coding only one PSSCH based on time-frequency domain indication information in the SCI and other transmission parameters comprises: and decoding the current PSSCH according to the time-frequency domain resource indication information in the SCI and other transmission parameters, wherein the current PSSCH is the PSSCH which is in the same time unit with the SCI, and the time-frequency domain position of the current PSSCH is obtained according to the time-frequency domain resource indication information in the SCI, and the time unit is the minimum time unit configured by the auxiliary link resource pool.
5. An apparatus for transmitting data of a secondary link, comprising:
a receiving unit, configured to receive an SCI carried by a currently transmitted PSCCH, where the SCI includes time-frequency domain indication information of multiple pschs;
a decoding unit, configured to decode multiple PSSCHs or only one PSSCH according to the time-frequency domain indication information and other transmission parameters in the SCI;
the coding unit includes: the judging module is used for judging whether a plurality of PSSCHs can be decoded according to the SCI; a first decoding module, configured to decode the PSSCHs according to the time-frequency domain indication information in the SCI and other transmission parameters when the determining module determines that the PSSCHs can be decoded according to the SCI; a second decoding module, configured to, when the determining module determines that the plurality of pschs may not be decoded according to the SCI, decode only one psch according to time-frequency domain indication information in the SCI and other transmission parameters, where the other transmission parameters at least include a redundancy version RV, a modulation and coding strategy MCS, an antenna port, a demodulation reference signal DMRS sequence initialization, and a DMRS pattern;
the judging module is further configured to judge that a plurality of PSSCHs can be decoded according to the SCI when PSSCH blind retransmission reception is confirmed; otherwise, it is determined that multiple PSSCHs may not be coded according to the SCI.
6. The apparatus of claim 5, wherein the first decoding module is configured to decode a current PSSCH and at least one subsequently received PSSCH according to time-frequency-domain resource indicator (SCI) in the SCI and other transmission parameters, wherein the current PSSCH is a PSSCH located in a same time cell as the SCI, and a time-frequency-domain position of the PSSCH is determined according to the time-frequency-domain resource indicator in the SCI, and the at least one subsequently received PSSCH is a PSSCH located at least one time cell interval after the time cell in which the SCI is located, and wherein the current PSSCH and the at least one subsequently received PSSCH transmit a same Transport Block (TB), and wherein a time cell is a minimum time cell configured by the secondary link resource pool.
7. The apparatus of claim 6, wherein the first decoding module is further configured to decode at least one PSSCH that has been previously received according to the time-frequency-domain resource indicator and other transmission parameters in the SCI, wherein the at least one PSSCH that has been previously received is a PSSCH that has at least one time unit interval before a time unit in which the SCI is located, and wherein a time-frequency-domain position of the PSSCH is determined according to the time-frequency-domain resource indicator in the SCI, and wherein a current PSSCH and the at least one PSSCH that has been previously received transmit a same transport block TB.
8. The apparatus of claim 5, wherein the second decoding module is configured to decode a current PSSCH according to the time-frequency-domain resource indicator and other transmission parameters in the SCI, the current PSSCH being a PSSCH that is in a same time cell as the SCI, and a time-frequency-domain position of the PSSCH being obtained according to the time-frequency-domain resource indicator in the SCI, wherein the time cell is a minimum time cell configured by the secondary link resource pool.
9. A user equipment, characterized in that the user equipment comprises the secondary link data transmission apparatus according to any one of claims 5 to 8.
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