Method and device for vehicle to everything (V2X) communications and a transmitting and receiving method and equipment in V2X communication
View Patent ↗The present disclosure relates to a communication method and system for converging a 5 th -Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention provides a method and device for vehicle to everything (V2X) communications. The method comprises: receiving configuration signaling transmitted by an eNB, and then determining, according to the configuration signaling, at least one of a search space corresponding to S-DCI_C, a transmission carrier of S-DCI_C, and the number of bits corresponding to S-DCI_C; or determining, according to the configuration signaling, at least one optional time position information for transmitting a Side Link Synchronization Signal (SLSS) and a Physical Sidelink Broadcast CHannel (PSBCH), and then, based on coverage state about whether a first UE is within cellular network coverage, according to the type of a reference synchronization source, determining time position information from the at least one optional time position information for transmitting the SLSS and the PSBCH, identity information of the SLSS to be transmitted, and the value of the inCoverage field in the PSBCH to be transmitted. The present application also provides a transmitting and receiving method in V2X communication, comprising the steps of: detecting, by a first-type UE, a PSCCH in format of SCI X transmitted by other UEs, and determining, according to the SCI X, whether to further measure PSSCH-RSRP of a PSSCH scheduled by the SCI X and whether to further decode the PSSCH scheduled by the SCI X. The method provided by the present application further comprises the steps of: detecting, by a second-type UE, a PSCCH in format of SCI X transmitted by other UEs, and determining, according to a modulation and coding bit field in the SCI X and a predefined TBS mapping rule, a TBS of a PSSCH scheduled by the SCI X. The method provided by the present application further comprises the step of: determining, by the second-type UE and according to a modulation scheme, the transmitting power of the PSCCH of the SCI X and the transmitting power of the PSSCH scheduled by the SCI X. By the above method, the coexistence of a first-type V2X UE and a second-type V2X UE can be better realized, and the transmission efficiency of the second-type V2X UE can be improved.
1. A method performed by a first terminal in a wireless communication system, the method comprising:
identifying that the first terminal is out of coverage of a cell, selecting a second terminal as a synchronization reference;
receiving, from the second terminal, a first sidelink synchronization signal (SLSS) based on time position information included in a configuration for a sidelink communication;
selecting an SLSS identifier (SLSSID) for the sidelink communication based on the first SLSS received from the second terminal; and
transmitting a second SLSS based on the SLSSID,
wherein the second terminal is out of coverage of the cell, and
wherein the first SLSS received from the second terminal is based on a global navigation satellite system (GLASS).
2. The method of claim 1 , wherein the time position information includes a time offset for identifying a slot in which the first SLSS is received, and
wherein the SLSSID of the first terminal is selected as 337 .
3. The method of claim 1 , wherein the time position information includes a sync offset indication value for identifying a subframe in which the first SLSS is received, and
wherein the SLSSID of the first terminal is selected as 169 .
4. T method of claim 1 , wherein an SLSSID of the second terminal is selected as 0.
5. A first terminal in a wireless communication system, the first terminal comprising
a transceiver configured to transmit and receive a signal; and
a controller coupled with the transceiver and configured to:
identify that the first terminal is out of coverage of a cell,
select a second terminal as a synchronization reference,
receive, from the second terminal, a first sidelink synchronization signal (SLSS) based on time position information included in a configuration for a sidelink communication,
select an SLSS identifier (SLSSID) for the sidelink communication based on the first SLSS received from the second terminal, and
transmit a second SLSS based on the SLSSID,
wherein the second terminal is out of coverage of the cell, and
wherein the first SLSS received from the second terminal is based on a global navigation satellite system (GNSS).
6. The first terminal of claim 5 , wherein the time position information includes a time offset for identifying a slot in which the first SLSS is received, and
wherein the SLSSID of the first terminal is selected as 337 .
7. The first terminal of claim 5 , wherein the time position information includes a sync offset indication value for identifying a suhframe in which the first SLSS is received, and
wherein the SLSSID of the first terminal is selected as 169 .
8. The first terminal of claim 5 , wherein an SLSSID of the second terminal is selected as 0.
9. A method performed by a second terminal in a wireless communication system, the method comprising:
identifying that the second terminal is out of coverage of a cell and uses global navigation satellite system (GNSS) as a synchronization reference;
selecting a sidelink synchronization signal (SLSS) identifier (SLSSID) for sidelink communication; and
transmitting, to a first terminal out of coverage of the cell, an SLSS based on time position information included in a configuration for the sidelink communication,
wherein the second terminal is selected as a synchronization reference for the first terminal, and
wherein an SLSSID of the first terminal is selected based on the transmitted SLSS.
10. The method of claim 9 , wherein the time position information includes a time offset for identifying a slot in which the SLSS is transmitted, and
wherein the SLSSID of the first terminal is selected as 337 .
11. The method of claim 9 , wherein the time position information includes a sync offset indication value for identifying a subframe in which the SLSS is transmitted, and
wherein the SLSSID of the first terminal is selected as 169 .
12. The method of claim 9 , wherein an SLSSID of the second terminal is selected as 0.
13. A second terminal in a wireless communication system, the second terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller coupled with the transceiver and configured to:
identify that the second terminal is out of coverage of a cell and uses global navigation satellite system (GNSS) as a synchronization reference,
select a sidelink synchronization signal (SLSS) identifier (SLSSID) for sidelink communication, and
transmit, to a first terminal out of coverage of the cell, an SLSS based on time position information included in a configuration for the sidelink communication,
wherein the second terminal is selected as a synchronization reference for the first terminal, and
wherein an SLSSID of first terminal is selected based on the transmitted SLSS.
14. The second terminal of claim 13 , wherein the time position information includes a time offset for identifying a slot in which the SLSS is transmitted, and
wherein the SLSSID of the first terminal is selected as 337 .
15. The second terminal of claim 13 , wherein the time position information includes a sync offset indication value for identifying a subframe in which the SLSS is transmitted, and
wherein the SLSSID of the first terminal is selected as 169 .
16. The second terminal of claim 13 , wherein an SLSSID of the second terminal is selected as 0.