Device-to-device (D2D) pre-emption and access control
Systems, methods, and instrumentalities are disclosed to determine access control and channel and signaling priority. A wireless transmit/receive unit (WTRU) may comprise a processor configured, at least in part, to determine device-to-device (D2D) data to be transmitted. The WTRU may determine if the D2D data may be transmitted. The WTRU may determine available scheduling assignment (SA) resources used for priority based D2D data signals. The WTRU may select one or more available SA resources used for priority based D2D data signals. The WTRU may transmit the D2D data, wherein the D2D data may be transmitted on the selected SA resources.
1. A wireless transmit/receive unit (WTRU) in communication with a wireless communication network, the WTRU comprising a memory, a processor, a transmitter, and a receiver, the WTRU configured to:
perform signal strength measurements on one or more signals received from at least a first node of the wireless communication network;
randomly select grant transmission resources from one or more available transmission resources for data of a first priority, wherein the one or more available transmission resources are determined by the WTRU based on: (1) the WTRU comparing the one or more signal strength measurements to a first threshold corresponding to data of the first priority, (2) the WTRU selecting one or more resource duration periods for the grant transmission resources; and (3) the WTRU determining at least one resource release indication for the grant transmission resources; and
transmit information indicating the selected one or more resource duration periods to a second node of the wireless communication network using the randomly selected grant transmission resources.
2. The WTRU of claim 1 , wherein the one or more signals includes one or more scheduling assignments.
3. The WTRU of claim 1 , wherein the first threshold corresponding to the first priority is preconfigured.
4. The WTRU of claim 1 , wherein the receiver is further configured to receive the first threshold corresponding to data of the first priority via Radio Resource Control (RRC) signaling.
5. The WTRU of claim 1 , wherein the transmitter is further configured to transmit the data of the first priority using the randomly selected grant transmission resources.
6. The WTRU of claim 1 , wherein the first node is at least one of an evolved NodeB (eNB), or another WTRU.
7. The WTRU of claim 1 , wherein the randomly selected grant transmission resources comprises a first selection of one or more first priority transmission resources from the one or more available transmission resources for data of the first priority, and
wherein the processor is further configured to:
randomly select a second selection of the one or more first priority transmission resources from the one or more available transmission resources for data of the first priority; and
replace the first selection of the one or more first priority transmission resources with the second selection of the one or more first priority transmission resources.
8. The WTRU of claim 1 , wherein the one or more available transmission resources for data of the first priority are assigned to one or more first priority transmission resource pools.
9. The WTRU of claim 8 , wherein the grant transmission resources are randomly selected from the one or more first priority transmission resource pools.
10. The WTRU of claim 1 , wherein the processor is further configured to:
randomly select second grant transmission resources from one or more available transmission resources for data of a second priority, wherein the one or more available transmission resources are determined by the WTRU based on: (1) the WTRU comparing the one or more signal strength measurements to a second threshold corresponding to data of the second priority, (2) the WTRU selecting one or more resource duration periods for the second grant transmission resources; and (3) the WTRU determining at least one resource release indication for the second grant transmission resources.
11. The WTRU of claim 10 , wherein the transmitter is further configured to transmit the data of the second priority using the randomly selected second grant transmission resources,
wherein the data of the first priority is higher in priority to the data of the second priority.
12. A method performed by a wireless transmit/receive unit (WTRU) in communication with a wireless communication network, the method comprising:
performing signal strength measurements on one or more signals received from at least a first node of the wireless communication network;
randomly select grant transmission resources from one or more available transmission resources for data of a first priority, wherein the one or more available transmission resources are determined by the WTRU based on: (1) the WTRU comparing the one or more signal strength measurements to a first threshold corresponding to data of the first priority, (2) the WTRU selecting one or more resource duration periods for the grant transmission resources; and (3) the WTRU determining at least one resource release indication for the grant transmission resources; and
transmitting information indicating the selected one or more resource duration periods to a second node of the wireless communication network using the randomly selected grant transmission resources.
13. The method of claim 12 , further comprising transmitting the data of the first priority using the randomly selected grant transmission resources.
14. The method of claim 12 , wherein the randomly selected grant transmission resources comprises a first selection of one or more first priority transmission resources from the one or more available transmission resources for data of the first priority, the method further comprising:
randomly selecting a second selection of the one or more first priority transmission resources from the one or more available transmission resources for data of the first priority; and
replacing the first selection of the one or more first priority transmission resources with the second selection of the one or more first priority transmission resources.
15. The method of claim 12 , further comprising:
randomly select second grant transmission resources from one or more available transmission resources for data of a second priority, wherein the one or more available transmission resources are determined by the WTRU based on: (1) the WTRU comparing the one or more signal strength measurements to the second threshold corresponding to data of a second priority, (2) the WTRU selecting one or more resource duration periods for the second grant transmission resources; and (3) the WTRU determining at least one resource release indication for the second grant transmission resources.
16. The method of claim 15 , further comprising transmitting, via a transmitter, the data of the second priority using the randomly selected second grant transmission resources,
wherein the data of the first priority is higher in priority to the data of the second priority.
17. A wireless transmit/receive unit (WTRU) in communication with a wireless communication network, the WTRU comprising a memory, a processor, a transmitter, and a receiver, the WTRU configured to:
randomly select grant transmission resources from one or more pools of available transmission resources for data of a first priority, wherein the one or more pools of available transmission resources are determined by the WTRU based on: (1) the WTRU selecting one or more resource duration periods for the grant transmission resources; and (2) the WTRU determining at least one resource release indication for the grant transmission resources;
transmit the one or more resource duration periods to a first node of the wireless communication network; and
transmit the data of the first priority using the randomly selected grant transmission resources to the first node of the wireless communication network.
18. The WTRU of claim 17 , wherein the WTRU is configured to:
receive one or more signals from at least a second node of the wireless communication network;
identify the available transmission resources for data of the first priority based on information in the one or more signals; and
assign the available transmission resources for data of the first priority to the one or more pools of available transmission resources for data of the first priority based on the information in the one or more signals.
19. The WTRU of claim 18 , wherein the second node is at least one of an evolved NodeB (eNB), or another WTRU.
20. The WTRU of claim 17 , wherein the processor is further configured to:
randomly select second grant transmission resources from one or more pools of available transmission resources for data of a second priority, wherein the one or more pools of available transmission resources are determined by the WTRU based on: (1) the WTRU selecting one or more resource duration periods for the second grant transmission resources; and (2) the WTRU determining at least one resource release indication for the second grant transmission resources,
wherein the transmitter is further configured to transmit the data of the second priority using the randomly selected second grant transmission resources, and
wherein the data of the first priority is higher in priority to the data of the second priority.
21. The WTRU claim 1 , wherein the WTRU is further configured to transmit the at least one resource release indication to the second node of the wireless communication network.
22. The method of claim 12 , further comprising transmitting the at least one resource release indication to the second node of the wireless communication network.
23. The WTRU of claim 17 , wherein the WTRU is further configured to transmit the at least one resource release indication to the first node of the wireless communication network.