Method and apparatus for transmission of control and data in vehicle to vehicle communication
A user equipment (UE) and base station (BS) in a wireless communication network. The UE includes a receiver configured to receive at least one semi-persistent scheduling (SPS) configuration among a plurality of SPS configurations from a BS. Each of the SPS configurations configures the UE with a different periodicity of a sidelink transmission to be transmitted to another UE. The UE also includes a transmitter configured to transmit the sidelink transmission in the different periodicity according to the at least one of the plurality of SPS configurations. The BS includes a controller configured to select at least one SPS configuration among a plurality of SPS configurations for a UE. Each of the SPS configurations configures the UE with a different periodicity of a sidelink transmission to be transmitted to another UE. The BS also includes a transmitter configured to transmit the selected at least one SPS configuration to the UE.
1. A user equipment (UE) in a wireless communication network, the UE comprising:
a receiver configured to receive at least one semi-persistent scheduling (SPS) configuration among a plurality of SPS configurations from a base station, wherein each of the plurality of SPS configurations configures the UE with a periodicity of a sidelink transmission to be transmitted to another UE, and wherein an activation or a release of each SPS configuration is indicated in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) transmission; and
a transmitter configured to: transmit the sidelink transmission with a periodicity according to the at least one received SPS configuration; and
transmit a scheduling assignment (SA) that indicates a sidelink data resource, and
wherein a resource for the SA and the sidelink data resource are orthogonal to each other in frequency-time domain.
2. The UE of claim 1 , wherein, when a traffic type changes, a corresponding SPS configuration is activated and a non-corresponding SPS is released.
3. The UE of claim 1 , wherein, when a change is required in the periodicity of the sidelink transmission, the UE is configured to perform a resource reselection.
4. The UE of claim 1 , wherein:
the SA includes a Physical Sidelink Control Channel (PSCCH),
the sidelink data resource includes a Physical Sidelink Shared Channel (PSSCH),
a PSCCH is transmitted for every PSSCH transmission, and
a resource location for SA transmission of each UE within a resource pool is indicated by the base station in a DCI format.
5. The UE of claim 4 , wherein a transmission of the PSSCH and the PSCCH is repeated in a random time offset with respect to a first transmission or in a fixed transmission period.
6. A base station (BS) in a wireless communication network, the base station comprising:
a controller configured to select at least one semi-persistent scheduling (SPS) configuration among a plurality of SPS configurations for a user equipment (UE), wherein each of the plurality of SPS configurations configures the UE with a periodicity of a sidelink transmission to be transmitted to another UE, and wherein an activation or a release of each SPS configuration is indicated in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) transmission; and
a transmitter configured to transmit the selected at least one SPS configuration to the UE and to transmit information on a resource for a scheduling assignment (SA) that indicates a sidelink data resource,
wherein the resource for SA and the sidelink data resource are orthogonal to each other in frequency-time domain.
7. The BS of claim 6 , wherein, when a traffic type changes, a corresponding SPS configuration is activated, and a non-corresponding SPS is released.
8. The BS of claim 6 , wherein, when a change is required in a periodicity of the sidelink transmission, the UE performs a resource reselection.
9. The BS of claim 6 , wherein:
the SA includes a Physical Sidelink Control Channel (PSCCH),
the sidelink data resource includes a Physical Sidelink Shared Channel (PSSCH),
a PSCCH is transmitted for every PSSCH transmission, and
a resource location for SA transmission of each UE within a resource pool is indicated by the base station in a DCI format.
10. The BS of claim 9 , wherein a transmission of the PSSCH and the PSCCH is repeated in a random time offset with respect to a first transmission or in a fixed transmission period.
11. A method for operating a user equipment (UE) in a wireless communication network, the method comprising:
receiving at least one semi-persistent scheduling (SPS) configuration among a plurality of SPS configurations from a base station, wherein each of the plurality of SPS configurations configures the UE with a periodicity of a sidelink transmission to be transmitted to another UE, and wherein an activation or a release of each SPS configuration is indicated in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) transmission;
transmitting a scheduling assignment (SA) that indicates a sidelink data resource, wherein a resource for the SA and the sidelink data resource are orthogonal to each other in frequency-time domain; and
transmitting the sidelink transmission with a periodicity according to the at least one received SPS configuration.
12. The method of claim 11 , wherein, when a traffic type changes, a corresponding SPS configuration is activated and a non-corresponding SPS is released.
13. The method of claim 11 , further comprising, when a change is required in the periodicity of the sidelink transmission, performing a resource reselection.
14. The method of claim 11 , wherein:
the SA includes a Physical Sidelink Control Channel (PSCCH),
the sidelink data resource includes a Physical Sidelink Shared Channel (PSSCH),
a PSCCH is transmitted for every PSSCH transmission, and
a resource location for SA transmission of each UE within a resource pool is indicated by the base station in a DCI format.