Fast Device Discovery for Device to Device Communication

摘要

A fast device discovery protocol with a high success rate for device-to-device (D2D) communication in LTE-A networks is proposed. With the proposed protocol, device discovery is done by monitoring a randomly transmitted beacon from other devices within a pre-defined period. In one embodiment, an eNB receives scheduling requests from D2D UEs and in response allocates a distributed uplink resource for random access of beacon transmission by the D2D UEs. The distributed resource is dynamically allocated based on the number of requesting D2D UEs, a discovery period, and a target discovery probability to minimize the required resource.

主权项

1. A method, comprising:
receiving one or more device-to-device (D2D) scheduling requests (SR) by a base station (eNB) in a wireless communication network; determining uplink resource allocation based on D2D discovery parameters comprising a number of total D2D devices requiring beacon transmission, a discovery period, and a target discovery probability; and transmitting an uplink grant to a plurality of D2D devices for beacon transmission, wherein the uplink grant allocates a distributed resource for random access of beacon transmission by the D2D devices, and wherein the distributed resource contains a plurality of resource blocks (RBs) distributed along frequency domain of subcarriers and time domain of time slots.