METHODS AND DEVICE FOR PERFORMING DEVICE-TO-DEVICE COMMUNICATION

摘要

Disclosed are methods for carrying out device-to-device (“D2D”) communication. In one implementation, a user equipment (“UE”) communicates D2D with another UE using uplink radio resources. The first UE receives a downlink signal from a base station and determines the reception time. The first UE also receives a timing advance for uplink communication. Based on the reception time and the timing advance, the first UE determines an uplink transmission time. When transmitting to the second UE, however, the first UE does not transmit at the determined UL transmission time. Rather, the first UE delays its D2D transmission for a period of time that is based on the second UE's uplink timing advance.

主权项

1. In a wireless network that includes a base station, a method, in a first UE, for carrying out device-to-device communication, the method comprising:
receiving a first control channel indicating a first resource for transmitting to a base station; in response to receiving the first control channel, transmitting a first signal to the base station via the first resource using a first cyclic prefix; receiving a second control channel indicating a second resource for transmitting to a second UE; and in response to receiving the second control channel, transmitting a second signal to the second UE via the second resource using a second cyclic prefix; wherein the second cyclic prefix is longer than the first cyclic prefix.