Signaling flows and buffer status report for a group in device-to-device broadcast communication

摘要

Methods, systems, and devices are described for device-to-device (D2D) wireless communication. A device may transmit an initiation message to a base station indicating that the device desires to initiate a D2D communication session. The device may then receive a response from the base station that includes parameters for configuration of the D2D session. When it has data to send to another device, the device may transmit buffer status report (BSR) to the base station. The base station may respond with a grant of D2D scheduling assignment (SA) configured according to the previously sent parameters. For example, the message may be scrambled with a D2D temporary identity sequence. In some cases, the device may transmit a group identification (ID) code to the base station, and the group ID may be associated with an index, so an SA for that group can be reference by index.

主权项

1. A method of wireless communication, comprising:
transmitting a first message from a device to a first base station, the first message indicating that the device desires to initiate a device-to-device (D2D) communication session, the first message comprising a group identification (ID) code; receiving a second message from the first base station comprising a D2D radio network temporary identity (RNTI) and a group index associated with the group ID code, the group index assigned according to a priority level associated with the group ID code; transmitting a third message to the first base station, the third message comprising an indication that there is data to transmit for the D2D communication session; and receiving a fourth message from the first base station that is transmitted according to the D2D RNTI.