Device-to-device data transmission method, apparatus, and system
A device-to-device data transmission method includes: performing signal detection on a first resource subset of a resource set used for data transmission, where a resource on which the signal detection is performed is less than the resource set; determining an available resource in the resource set based on a signal detection result; and transmitting to-be-transmitted data by selecting a resource from the available resource.
1. A device-to-device data transmission method, comprising:
determining, by a device-to-device data transmission apparatus, reservation information, where the reservation information indicates a factor of a reservation period length, wherein the factor of the reservation period length includes a parameter i, and i is greater than 0 and less than 1; and
transmitting, by the device-to-device data transmission apparatus, data based on the reservation information.
2. The method according to claim 1 , wherein at least one of first bit signaling or second bit signaling in scheduling assignment (SA) information indicates the parameter i, wherein the first bit signaling corresponds to a vehicle-to-vehicle (V2V) communications technology, and the second bit signaling belongs to reserved bit signaling in the SA information.
3. The method according to claim 2 , wherein the factor of the reservation period length includes a parameter P, where P is less than 100.
4. The method according to claim 1 , wherein the factor of the reservation period length includes a parameter P, where P is less than 100.
5. The method according to claim 4 , wherein Radio Resource Control (RRC) signaling indicates the parameter P.
6. The method according to claim 1 , wherein the reservation information is indicated by scheduling assignment (SA) information or Radio Resource Control (RRC) signaling.
7. A device-to-device data transmission apparatus, comprising:
at least one processor, configured to determine reservation information, wherein the reservation information indicates a factor of a reservation period length, wherein the factor of the reservation period length includes a parameter i, and i is greater than 0 and less than 1; and
a transmitter, configured to transmit data based on the reservation information or receive data based on the reservation information.
8. The apparatus according to claim 7 , wherein at least one of first bit signaling or second bit signaling in scheduling assignment (SA) information indicates the parameter i, wherein the first bit signaling corresponds to a vehicle-to-vehicle (V2V) communications technology, and the second bit signaling belongs to reserved bit signaling in the SA information.
9. The apparatus according to claim 8 , wherein the factor of the reservation period length includes a parameter P, where P is less than 100.
10. The apparatus according to claim 7 , wherein the factor of the reservation period length includes a parameter P, where P is less than 100.
11. The apparatus according to claim 10 , wherein Radio Resource Control (RRC) signaling indicates the parameter P.
12. The apparatus according to claim 7 , wherein the reservation information is indicated by scheduling assignment (SA) information or Radio Resource Control (RRC) signaling.
13. A non-transitory computer-readable medium having processor-executable instructions stored thereon, wherein the processor-executable instructions, when executed, facilitate:
determining reservation information, where the reservation information indicates a factor of a reservation period length, wherein the factor of the reservation period length includes a parameter i, and i is greater than 0 and less than 1; and
transmitting data based on the reservation information.
14. The medium according to claim 13 , wherein at least one of first bit signaling or second bit signaling in scheduling assignment (SA) information indicates the parameter i, the first bit signaling corresponds to a vehicle-to-vehicle (V2V) communications technology, and the second bit signaling belongs to reserved bit signaling in the SA information.
15. The medium according to claim 14 , wherein the factor of the reservation period length includes a parameter P, where P is less than 100.
16. The medium according to claim 13 , wherein the factor of the reservation period length includes a parameter P, where P is less than 100.
17. The medium according to claim 16 , wherein Radio Resource Control (RRC) signaling indicates the parameter P.
18. The medium according to claim 13 , wherein the reservation information is indicated by scheduling assignment (SA) information or Radio Resource Control (RRC) signaling.