Method and apparatus for transmitting and receiving signal for device-to-device terminal in wireless communication system
Disclosed is a method for transmission and reception of a device-to-device (D2D) signal by a terminal in a wireless communication system. The method for transmission and reception of a D2D signal, according to an embodiment of the present invention, comprises the steps of: receiving a scheduling assignment comprising a resources pattern for transmission (RPT); and receiving a D2D signal in a subframe indicated in the RPT, wherein each bit of the RPT indicates whether or not the D2D signal is permitted to be transmitted in the subframe within a scheduling assignment period, and wherein, if the number of the subframes comprised in the scheduling assignment period is greater than the number of the bits of the RPT, at least one bit of the RPT indicates whether or not the D2D signal is permitted to be transmitted in two or more subframes.
1. A method of transmitting and receiving a device-to-device (D2D) signal by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a D2D signal transmitting UE, information including a first resource pattern for transmission (RPT) corresponding to a first bitmap via a channel for a scheduling assignment; and
receiving, from the D2D signal transmitting UE, a D2D signal in one or more subframes indicated by the first RPT,
wherein:
each of bits of the first RPT indicates whether the D2D signal is transmitted in at least one of subframes included in a period for the channel for the scheduling assignment;
the one or more subframes indicated by the first RPT are selected by the D2D signal transmitting UE from among subframes which are indicated by a second RPT, corresponding to a second bitmap, signaled from an eNB such that the one or more subframes meet both of requirements from the first bitmap and the second bitmap; and
when a number of subframes included in the period for the channel for the scheduling assignment is greater in number than a number of the bits of the first RPT, at least one of the bits of the first RPT indicates whether the D2D signal is permitted to be transmitted in two or more of the subframes.
2. The method according to claim 1 , wherein, when the subframes included in the period for the channel for the scheduling assignment is greater in number than the number of the bits of the first RPT, the UE repeatedly uses the first RPT.
3. The method according to claim 1 , wherein, when the number of the subframes included in the period for the channel for the scheduling assignment is n times the number of the bits of the first RPT, the UE repeatedly uses the first RPT in the period for the channel for the scheduling assignment.
4. The method according to claim 1 , wherein the first RPT is repeatedly used in the period for the channel for the scheduling assignment.
5. The method according to claim 4 , wherein, when the number of the subframes included in the period for the channel for the scheduling assignment is not a multiple of the number of the bits of the first RPT, only a portion of the first RPT is used when the first RPT is lastly repeatedly used.
6. The method according to claim 5 , wherein only the portion of the first RPT is used by sequentially using the bits of the first RPT.
7. The method according to claim 5 , wherein the bits of the portion of the first RPT is the same in number as a remainder obtained by dividing the number of the subframes included in the period for the channel for the scheduling assignment by the number of the bits of the first RPT.
8. The method according to claim 1 , wherein the UE receives, from a base station, an instruction regarding a resource region for transmission of the D2D signal.
9. The method according to claim 1 , wherein the UE receives a resource pool for transmission of the D2D signal from a base station.
10. The method according to claim 9 , wherein the bits of the first RTP indicate only subframes included in the resource pool.
11. The method according to claim 1 , wherein the scheduling assignment comprises one or more of the first RPT.
12. The method according to claim 1 , wherein the scheduling assignment is transmitted from a base station or a relay.
13. A device-to-device (D2D) user equipment for transmitting and receiving a D2D signal in a wireless communication system, the D2D user equipment comprising:
a transmission module; and
a processor,
wherein:
the processor receives information including a first resource pattern for transmission (RPT) corresponding to a first bitmap via a channel for a scheduling assignment from a D2D signal transmitting UE, and receives a D2D signal in one or more subframes indicated by the first RPT from the D2D signal transmitting UE;
each of bits of the first RPT indicates whether the D2D signal is transmitted in one of subframes included in a period for the channel for the scheduling assignment;
the one or more subframes indicated by the first RPT are selected by the D2D signal transmitting UE from among subframes which are indicated by a second RPT, corresponding to a second bitmap, signaled from an eNB such that the one or more subframes meet both of requirements from the first bitmap and the second bitmap; and
when the subframes included in the period for the channel for the scheduling assignment is greater in number than the bits of the first RPT, at least one of the bits of the first RPT indicates whether the D2D signal is permitted to be transmitted in two or more of the subframes.