Patent ID: 9386551
Filing Date: 2016-07-05
CPC Classification: H04L,H04W,Y02D

Claim Text:
1. A method for wireless communication performed by a root device within an ad-hoc network, comprising: negotiating, by a first device, with other devices of the ad-hoc network to determine the root device, wherein the negotiation includes each of the other devices designating itself as a preliminary root device and in response, transmitting synchronization messages, wherein a signal strength of the synchronization messages is usable by the other devices and the first device to determine the first device is the root device; determining, by the root device, one of the other devices with the highest signal strength that has been active within a predetermined time period is a back-up root device; generating, by the root device, an update to an availability window during which communication occurs between other devices of the ad-hoc network; generating, by the root device, a synchronization message, the synchronization message identifying the back-up root device to replace the root device and generate prospective synchronization messages in lieu of the root device, the prospective synchronization messages communicating a further updated availability window to the other devices of the ad-hoc network; and transmitting, by the root device, the synchronization message.