Systems and methods for multiple redundant transmissions for user equipment cooperation
Aspects of the present application provide methods and device for use in User Equipment (UE) cooperation. UE cooperation may include the cooperating UEs (CUEs) forwarding traffic to or from one or more target UEs (TUEs) with redundant signal transmissions or receptions. Methods involve a base station transmitting configuration information to at least one cooperative user equipment (CUE) and to a target user equipment (TUE). The configuration information includes an indication of resources for a sidelink (SL) transmission and a redundancy parameter for the SL transmission. The SL transmission is a transmission for the at least one CUE to forward a packet intended for the TUE. The base station also transmits the packet intended for the TUE, to a plurality of UEs comprising the at least one CUE and the TUE.
1. A method comprising:
receiving, by a user equipment (UE) from a base station, configuration information comprising an indication of resources for a sidelink (SL) transmission, a redundancy parameter for the SL transmission, and an identification of a cooperative user equipment (CUE), where the CUE is to aid by forwarding, via the SL transmission, a packet intended for the UE based on an identification of the UE in a higher layer data portion of the packet;
receiving, by the UE, a first packet that is forwarded by the CUE via the SL transmission, where the first packet is received by the CUE from the base station and intended for the UE, and where the UE also receives sidelink control information (SCI) from the CUE for further configurating the SL transmission; and
receiving, by the UE, a second packet from the base station via Uu link.
2. The method of claim 1 , wherein the configuration information comprises:
SL transmission resources available to be used by the UE for receiving the first packet that is forwarded from the CUE via the SL transmission; and
an identification of initial or redundant transmission signals associated with the UE and a number of repetitions.
3. The method of claim 1 , wherein the SL transmission resources are a configured grant transmission resource or dynamically scheduled; and wherein receiving the first packet comprises one of:
receiving the first packet using one or more repetitions on at least one configured grant transmission resource, wherein the SCI is for configuring one or more of: redundant version signal information, forwarding scheme, feedback related information and resource allocation/indication, CUE/source identifier (ID) in a UE cooperation (UC) group, TUE ID/designation ID in the UC group and modulation and coding scheme (MCS); or
receiving the first packet using one or more repetitions on at least one transmission resource that is dynamically scheduled, wherein the SCI is for configuring one or more of: redundant version signal information, a hybrid automatic repeat request (HARQ) ID associated with the first packet, diversity scheme, forwarding scheme, TUE ID/designation ID in the UC group and MCS.
4. The method of claim 1 , wherein the receiving configuration information comprises receiving via at least one of higher layer signaling message or dynamic signaling message.
5. The method of claim 1 , wherein the higher layer of the higher layer data portion of the packet comprises a layer higher than physical layer.
6. The method of claim 5 , wherein the higher layer of the higher layer data portion of the packet is at least one of packet data convergence protocol (PDCP), radio link control (RLC), or Internet Protocol (IP) layer.
7. The method of claim 1 , wherein:
the receiving, by the UE, the first packet comprises receiving via unicast or groupcast: or
the receiving, by the UE, the first packet comprises receiving according to a redundancy parameter for the SL transmission.
8. The method of claim 1 further comprising, transmitting, by the UE, to the CUE, a third packet that is forwarded by the CUE to the base station.
9. The method of claim 1 further comprising, transmitting, by the UE, a fourth packet to the base station via Uu link.
10. The method of claim 1 further comprising the second packet and the first packet may be redundant versions of the same information transmitted, and wherein received signals of the second packet from the base station and received signals from the first packet from the CUE may be combined.
11. A device comprising:
a processor; and
a non-transitory computer-readable medium having stored thereon computer-implemented instructions, that when executed by the processor cause the device to:
receive configuration information, from a base station, comprising an indication of resources for a sidelink (SL) transmission, a redundancy parameter for the SL transmission, and an identification of the cooperative user equipment (CUE), wherein the CUE is to aid by forwarding, via the SL transmission, a packet intended for the TUE, based on an identification of the UE in a higher layer data portion of the packet;
receive a first packet that is forwarded by the CUE via the SL transmission, where the first packet is received by the CUE from the base station and intended for the UE and where the UE also receives sidelink control information (SCI) from the CUE for further configurating the SL transmission; and
receive a second packet from the base station via Uu link.
12. The device of claim 11 , wherein the configuration information comprises:
SL transmission resources available to be used by the device for receiving the first packet that is forwarded from the CUE via the SL transmission; and
an identification of initial or redundant transmission signals associated with the device and a number of repetitions.
13. The device of claim 11 , wherein the SL transmission resources are a configured grant transmission resource or dynamically scheduled and the instructions further cause the device to receive the first packet by one of:
receiving the first packet using one or more repetitions on at least one configured grant transmission resource, wherein the SCI is for configuring one or more of: redundant version signal information, forwarding scheme, feedback related information and resource allocation/indication, CUE/source identifier (ID) in a UE cooperation (UC) group, TUE ID/designation ID in the UC group and modulation and coding scheme (MCS); or
receiving the first packet using one or more repetitions on at least one transmission resource that is dynamically scheduled, wherein the SCI is for configuring one or more of: redundant version signal information, a hybrid automatic repeat request (HARQ) ID associated with the first packet, diversity scheme, forwarding scheme, TUE ID/designation ID in the UC group and MCS.
14. The device of claim 11 , wherein the instructions to receive the configuration information comprise instructions to receive via at least one of higher layer signaling message or dynamic signaling message.
15. The device of claim 11 , wherein the higher layer of the higher layer data portion of the packet comprises a layer higher than physical layer.
16. The device of claim 15 , wherein the higher layer of the higher layer data portion of the packet is at least one of packet data convergence protocol (PDCP), radio link control (RLC), or Internet Protocol (IP) layer.
17. The device of claim 11 , wherein the instructions to:
receive the first packet intended for the UE comprise instructions to receive via unicast or groupcast; or
receive the first packet intended for the UE comprise instructions to receive according to a redundancy parameter for the SL transmission.
18. The device of claim 11 further comprising instructions to transmit to the CUE, a third packet that is forwarded by the CUE to the base station.
19. The device of claim 11 further comprising instructions to transmit a fourth packet to the base station via Uu link.
20. The device of claim 11 further comprising the second packet and the first packet may be redundant versions of same information transmitted, and received signals of the second packet from the base station and received signal from the first packet from the CUE may be combined.