Systems and methods for synchronization within a neighborhood aware network

摘要

Methods, devices, and computer program products for synchronization of wireless devices in a peer-to-peer network are described herein. In one aspect, a method for determining at least one of a time for exiting and a time for entering a low power sleep mode to utilize a discovery window is provided. The method includes determining an earliest possible start time of a discovery window according to a clock at the first device. The method further includes transitioning from the low power sleep mode to a higher power active mode approximately at the determined earliest possible start time, wherein the determined earliest possible start time is based at least in part on a clock drift value associated with the first device and a clock drift value associated with a second device of the wireless network.

主权项

1. In a first device of a neighborhood aware network (NAN), a method of determining at least one of a time for exiting and a time for entering a low power sleep mode to utilize a discovery window comprising:
determining an earliest possible start time of the discovery window according to a clock at the first device; transitioning from the low power sleep mode to a higher power active mode at the determined earliest possible start time, the determined earliest possible start time based at least in part on a clock drift value associated with the first device and a clock drift value associated with a second device of the network; receiving, from the second device, a signal defining a start time of the discovery window; and transitioning to the low power sleep mode at the end of a pre-determined time duration after receiving the signal defining the start time of the discovery window, the pre-determined time duration being independent of a time duration for the first device to transmit, wherein the pre-determined time duration is equal to a pre-determined discovery window duration plus two times the sum of the clock drift value associated with the first device and the clock drift value associated with the second device.