Method and apparatus for allocating resources through cooperation between terminals in V2X system
Disclosed are a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. A method for a first terminal of a communication system, according to one embodiment of the present disclosure, comprises the steps of: sharing information about a resource pool with a second terminal; receiving a request for resource allocation information from the second terminal; and transmitting, to the second terminal, resource allocation information indicating at least one resource related to the resource pool having been shared with the second terminal.
1 . A method performed by a first user equipment (UE) in a communication system, the method comprising:
receiving, from a second UE, a request for inter UE coordination information;
transmitting, to the second UE, the inter UE coordination information; and
receiving, from the second UE, a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) on a resource selected based on the inter UE coordination information,
wherein the request for the inter UE coordination information is received via 2nd-stage sidelink control information (SCI) carried on PSSCH or via a first sidelink (SL) medium access control control element (MAC CE),
wherein, in case that the request for the inter UE coordination information is received via the first SL MAC CE, the first SL MAC CE includes information on a priority and information on a number of subchannels,
wherein the inter UE coordination information includes time resource information indicating an offset from a reference slot and frequency resource information indicating a location of a starting subchannel, and
wherein the reference slot is determined based on a direct frame number (DFN).
2 . The method of claim 1 , wherein the inter UE coordination information is transmitted via 2nd-stage SCI carried on PSSCH or via a second SL MAC CE.
3 . The method of claim 1 , wherein a resource reservation period and a resource selection window are indicated by a higher layer.
4 . A method performed by a second user equipment (UE) in a communication system, the method comprising:
transmitting, to a first UE, a request for inter UE coordination information;
receiving, from the first UE, the inter UE coordination information; and
transmitting, to the first UE, a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) on a resource selected based on the inter UE coordination information,
wherein the request for the inter UE coordination information is transmitted via 2nd-stage sidelink control information (SCI) carried on PSSCH or via a first sidelink (SL) medium access control control element (MAC CE),
wherein, in case that the request for the inter UE coordination information is transmitted via the first SL MAC CE, the first SL MAC CE includes information on a priority and information on a number of subchannels,
wherein the inter UE coordination information includes time resource information indicating an offset from a reference slot and frequency resource information indicating a location of a starting subchannel, and
wherein the reference slot is determined based on a direct frame number (DFN).
5 . The method of claim 4 , wherein the inter UE coordination information is received via 2nd-stage SCI carried on PSSCH or via a second SL MAC CE.
6 . The method of claim 4 , wherein a resource reservation period and a resource selection window are indicated by a higher layer.
7 . A first user equipment (UE) in a communication system, the first UE comprising:
a transceiver; and
a controller configured to:
receive, from a second UE, a request for inter UE coordination information;
transmit, to the second UE, the inter UE coordination information; and
receive, from the second UE, a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) on a resource selected based on the inter UE coordination information,
wherein the request for the inter UE coordination information is received via 2nd-stage sidelink control information (SCI) carried on PSSCH or via a first sidelink (SL) medium access control control element (MAC CE),
wherein, in case that the request for the inter UE coordination information is received via the first SL MAC CE, the first SL MAC CE includes information on a priority and information on a number of subchannels,
wherein the inter UE coordination information includes time resource information indicating an offset from a reference slot and frequency resource information indicating a location of a starting subchannel, and
wherein the reference slot is determined based on a direct frame number (DFN).
8 . The first UE of claim 7 , wherein the inter UE coordination information is transmitted via 2nd-stage SCI carried on PSSCH or via a second SL MAC CE.
9 . The first UE of claim 7 , wherein a resource reservation period and a resource selection window are indicated by a higher layer.
10 . A second user equipment (UE) in a communication system, the second UE comprising:
a transceiver; and
a controller configured to:
transmit, to a first UE, a request for inter UE coordination information;
receive, from the first UE, the inter UE coordination information; and
transmit, to the first UE, a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) on a resource selected based on the inter UE coordination information,
wherein the request for the inter UE coordination information is transmitted via 2nd-stage sidelink control information (SCI) carried on PSSCH or via a first sidelink (SL) medium access control control element (MAC CE),
wherein, in case that the request for the inter UE coordination information is transmitted via the first SL MAC CE, the first SL MAC CE includes information on a priority and information on a number of subchannels,
wherein the inter UE coordination information includes time resource information indicating an offset from a reference slot and frequency resource information indicating a location of a starting subchannel, and
wherein the reference slot is determined based on a direct frame number (DFN).
11 . The second UE of claim 10 , wherein the inter UE coordination information is received via 2nd-stage SCI carried on PSSCH or via a second SL MAC CE.