Apparatus and method for monitoring D2D transmission in connected state
A method and an apparatus for monitoring device-to-device (D2D) transmission in a connected state in a communication system supportive of a D2D scheme are provided. The method includes monitoring, by a D2D user equipment (UE), a D2D transmission during a D2D resource cycle and a discontinuous reception (DRX) cycle in a radio resource control (RRC) state, transmitting an indication including a capability of the UE to a base station, and reestablishing an RRC connection from the base station, wherein the D2D resource cycle and the DRX cycle are configured not to overlap each other based on the indication.
1. A method for device-to-device (D2D) communication by a D2D user equipment (UE), the method comprising:
transmitting an indication for indicating D2D monitoring of the D2D UE to a base station;
receiving a discontinuous reception (DRX) configuration from the base station; and
monitoring D2D transmission from another UE based on D2D resources configured by the base station.
2. The method of claim 1 ,
wherein the indication includes information about a capability of the UE, and
wherein the capability of the UE indicates that the UE does not include a capability to simultaneously monitor a downlink (DL) frequency and an uplink (UL) frequency.
3. The method of claim 1 ,
wherein the indication includes information about a capability of the UE, and
wherein the capability of the UE indicates whether a DRX cycle can be configured to overlap a period of the D2D resources.
4. The method of claim 1 , wherein the UE includes a capability that the UE does not monitor DL subframes corresponding to UL subframes with the D2D resources.
5. The method of claim 1 , further comprising transmitting a message, requesting to monitor the base station based on the indication, to the base station.
6. The method of claim 1 , wherein a DRX ON period of the DRX cycle is non-overlapping with a period of the D2D resources.
7. The method of claim 1 , wherein the D2D resources are received in system information.
8. The method of claim 1 , wherein the DRX cycle is defined based on at least one of information related to on-duration, information related to on-timer, and information related to a DRXoffset.
9. The method of claim 1 , wherein the DRX configuration is determined based on the indication.
10. The method of claim 1 , wherein the monitoring comprises monitoring the D2D resources.
11. The method of claim 1 , wherein the D2D resources are determined based on the DRX configuration.
12. The method of claim 1 , wherein the indication is transmitted in a radio resource control (RRC) connected state.
13. A device-to-device (D2D) user equipment (UE) apparatus for D2D communication, the D2D UE apparatus comprising:
a transceiver configured to transmit and receive data; and
a processor configured to:
control the transceiver to transmit an indication for indicating D2D monitoring of the D2D UE to a base station, and
monitor D2D transmission from another UE based on D2D resources configured by the base station.
14. The D2D UE apparatus of claim 13 ,
wherein the indication includes information about a capability of the UE, and
wherein the capability of the UE indicates that the UE does not include a capability to simultaneously monitor a downlink (DL) frequency and an uplink (UL) frequency.
15. The D2D UE apparatus of claim 13 ,
wherein the indication includes information about a capability of the UE, and
wherein the capability of the UE indicates whether a DRX cycle can be configured to overlap a period of the D2D resources.
16. The D2D UE apparatus of claim 13 , wherein the UE includes a capability that the UE does not monitor DL subframes corresponding to UL subframes with the D2D resources.
17. The D2D UE apparatus of claim 13 , wherein the transceiver is further configured to transmit a message, requesting to monitor the base station based on the indication, to the base station.
18. The D2D UE apparatus of claim 13 , wherein a DRX ON period of the DRX cycle is non-overlapping with a period of the D2D resources.
19. The D2D UE apparatus of claim 13 , wherein the D2D resources are received in system information.
20. The D2D UE apparatus of claim 13 , wherein the DRX cycle is defined based on at least one of information related to on-duration, information related to on-timer, and information related to a DRXoffset.
21. The D2D UE of claim 13 , wherein the DRX configuration is determined based on the indication.
22. The D2D UE of claim 13 , wherein the processor is configured to monitor the D2D resources.
23. The D2D UE of claim 13 , wherein the D2D resources are determined based on the DRX configuration.
24. The D2D UE of claim 13 , wherein the indication is transmitted in a radio resource control (RRC) connected state.
25. A method for device-to-device (D2D) communication, the method comprising:
receiving an indication for indicating D2D monitoring of a D2D user equipment (UE) from the D2D UE; and
transmitting a discontinuous reception (DRX) configuration to the D2D UE,
wherein a D2D transmission from another UE is monitored based on D2D resources configured by the base station.
26. The method of claim 25 ,
wherein the indication includes information about a capability of the UE, and
wherein the capability of the UE indicates that the UE does not include a capability to simultaneously monitor a downlink (DL) frequency and an uplink (UL) frequency.
27. The method of claim 25 ,
wherein the indication includes information about a capability of the UE, and
wherein the capability of the UE indicates whether a DRX cycle can be configured to overlap a period of the D2D resources.
28. The method of claim 25 , wherein the UE includes a capability that the UE does not monitor DL subframes corresponding to UL subframes with D2D resources.
29. The method of claim 25 , further comprising receiving a message requesting to monitor the base station based on the indication.
30. The method of claim 25 , wherein a DRX ON period of the DRX cycle is non-overlapping with a period of the D2D resources.
31. The method of claim 25 , wherein the D2D resources are transmitted in system information.
32. The method of claim 25 , wherein the DRX cycle is defined based on at least one of information related to on-duration, information related to on-timer, and information related to a DRXoffset.
33. The method of claim 25 , wherein the DRX configuration is determined based on the indication.
34. The method of claim 25 , wherein the monitoring comprises monitoring the D2D resources.
35. The method of claim 25 , wherein the D2D resources are determined based on the DRX configuration.
36. The method of claim 25 , wherein the indication is transmitted in a radio resource control (RRC) connected state.
37. An apparatus for device-to-device (D2D) communication, the apparatus comprising:
a transceiver configured to transmit and receive data; and
a processor configured to:
control the transceiver to receive an indication for indicating D2D monitoring of a D2D user equipment (UE) from the D2D UE, and
control the transceiver to transmit a discontinuous reception (DRX) configuration to the D2D UE,
wherein a D2D transmission from another UE is monitored based on D2D resources configured by the base station.
38. The apparatus of claim 37 ,
wherein the indication includes information about a capability of the UE, and
wherein the capability of the UE indicates that the UE does not include a capability to simultaneously monitor a downlink (DL) frequency and an uplink (UL) frequency.
39. The apparatus of claim 37 ,
wherein the indication includes information about a capability of the UE, and
wherein the capability of the UE indicates whether a DRX cycle can be configured to overlap a period of the D2D resources.
40. The apparatus of claim 37 , wherein the UE includes a capability that the UE does not monitor DL subframes corresponding to UL subframes with D2D resources.
41. The apparatus of claim 37 , wherein the transceiver is further configured to receive a message requesting to monitor the base station based on the indication.
42. The apparatus of claim 37 , wherein a DRX ON period of the DRX cycle is non-overlapping with a period of the D2D resources.
43. The apparatus of claim 37 , wherein the D2D resources are transmitted in system information.
44. The apparatus of claim 37 , wherein the DRX cycle is defined based on at least one of information related to on-duration, information related to on-timer, and information related to a DRXoffset.
45. The D2D UE of claim 37 , wherein the DRX configuration is determined based on the indication.
46. The D2D UE of claim 37 , wherein the D2D resources is monitored by the D2D UE.
47. The D2D UE of claim 37 , wherein the D2D resources are determined based on the DRX configuration.
48. The D2D UE of claim 37 , wherein the indication is transmitted in a radio resource control (RRC) connected state.