Network-Managed Direct Device to Device Communications

1. A method performed by a first user equipment (UE), the method comprising: signaling, by the first UE, capabilities that indicate whether the first UE is able to receive inter-device session (IDS) data and downlink data from a network node in one subframe, wherein the signaled capabilities cause the network node to schedule the IDS data and the downlink data from the network node in one subframe; receiving configuration information for the first UE (UE 1 configuration information) for an IDS between the first UE and a second UE, the UE 1 configuration information including a radio network identifier; and receiving a control message configured with the radio network identifier and a radio resource identifier, the radio resource identifier corresponding to an IDS radio resource for transmitting data directly from the first UE to the second UE.

2. The method of claim 1 , wherein transmission timing for the IDS radio resource is based on a timing alignment for an uplink resource from the first UE to the network node.

3. The method of claim 1 , further comprising transmitting a request, to the network node, for a transmission resource to send data from the first UE to the second UE.

4. The method of claim 1 , further comprising transmitting data directly to the second UE during the IDS.

5. The method of claim 1 , further comprising: receiving a set-up message, the set-up message including an IDS physical uplink control channel (IDS-PUCCH) that is associated with the IDS and configured for use with the radio network identifier; and transmitting an uplink control message using an uplink resource provided by the IDS-PUCCH.

6. The method of claim 5 , wherein the uplink control message includes one or more of: an IDS schedule request, IDS channel state reporting, or IDS acknowledgement/negative acknowledgement (ACK/NACK) feedback.

7. The method of claim 1 , further comprising measuring signals received from the second UE based at least partly upon the UE 1 configuration information, and using a measurement to determine the IDS channel quality.

8. A first user equipment (UE) comprising: a transceiver configured to: signal capabilities that indicate whether the first UE is able to receive inter-device session (IDS) data and downlink data from a network node in one subframe, wherein the signaled capabilities cause the network node to schedule the IDS data and the downlink data from the network node in one subframe; receive configuration information for the first UE (UE 1 configuration information) for an IDS between the first UE and a second UE, the UE 1 configuration information including a radio network identifier; and receive a control message configured with the radio network identifier and a radio resource identifier, the radio resource identifier corresponding to an IDS radio resource for transmitting data directly from the first UE to the second UE.

9. The UE of claim 8 , wherein transmission timing for the IDS radio resource is based on a timing alignment for an uplink resource from the first UE to the network node.

10. The UE of claim 8 , wherein the transceiver is further configured to transmit a request, to the network node, for a transmission resource to send data from the first UE to the second UE.

11. The UE of claim 8 , wherein the transceiver is further configured to transmit data directly to the second UE during the IDS.

12. The UE of claim 8 , wherein the transceiver is further configured to: receive a set-up message, the set-up message including an IDS physical uplink control channel (IDS-PUCCH) that is associated with the IDS and configured for use with the radio network identifier, and transmit an uplink control message using an uplink resource provided by the IDS-PUCCH.

13. The UE of claim 12 , wherein the uplink control message includes one or more of: an IDS schedule request, IDS channel state reporting, or IDS acknowledgement/negative acknowledgement (ACK/NACK) feedback.

14. The UE of claim 8 further comprising a processor configured to measure signals received from the second UE based at least partly upon the UE 1 configuration information, and using a measurement to determine the IDS channel quality.

15. A first user equipment (UE) comprising: a transceiver configured to: signal capabilities that indicate whether the first UE is able to receive inter-device session (IDS) data and downlink data from a network node in one subframe, wherein the signaled capabilities cause the network node to schedule the IDS data and the downlink data from the network node in one subframe; receive configuration information for the first UE (UE 1 configuration information) for an IDS between the first UE and a second UE, the UE 1 configuration information including a radio network identifier; receive a set-up message, the set-up message including an IDS physical uplink control channel (IDS-PUCCH) that is associated with the IDS and configured for use with the radio network identifier; and transmit an uplink control message using an uplink resource provided by the IDS-PUCCH; wherein the IDS-PUCCH is in addition to a physical uplink control channel (PUCCH) associated with a cell radio network temporary identifier (CRNTI) of the first UE.

16. The UE of claim 15 , wherein the uplink control message includes one or more of: an IDS schedule request, IDS channel state reporting, or IDS acknowledgement/negative acknowledgement (ACK/NACK) feedback.

17. The UE of claim 15 , wherein the transceiver is further configured to receive a control message configured with the radio network identifier and a radio resource identifier, the radio resource identifier corresponding to an IDS radio resource for transmitting data directly from the first UE to the second UE.

18. The UE of claim 15 , wherein transmission timing for the IDS radio resource is based on a timing alignment for an uplink resource from the first UE to the network node.

19. The UE of claim 15 , wherein the transceiver is further configured to transmit a request, to a network node, for a transmission resource to send data from the first UE to the second UE.

20. The UE of claim 15 , wherein the transceiver is further configured to transmit data directly to the second UE during the IDS, and using a measurement to at least determine the IDS channel quality.

21. A method performed by a network node, the method comprising: receiving, from a first UE, capabilities that indicate whether the first UE is able to receive inter-device session (IDS) data and downlink data from a network node in one subframe, wherein the received capabilities cause the network node to schedule the IDS data and the downlink data from the network node in one subframe; sending configuration information for the first UE (UE 1 configuration information) for an IDS between the first UE and a second UE, the UE 1 configuration information including a radio network identifier; and sending a control message configured with the radio network identifier and a radio resource identifier, the radio resource identifier corresponding to an IDS radio resource for transmitting data directly from the first UE to the second UE.