Patent ID: 9066320
Filing Date: 2015-06-23
Classification: H04W

Abstract:
1. A method for facilitating late entry of a late entrant node into an ad-hoc radio network in which a network hopping sequence changes over time in a non-deterministic manner in response to a spectral environment, comprising: accessing from a memory at the late entrant node an initial frequency hopping sequence for said ad-hoc radio network, said initial frequency hopping sequence specifying a plurality of frequencies, each respectively assigned to one of a plurality of defined frequency hops of said frequency hopping sequence, said initial frequency hopping sequence specifying a sequence of frequency hops used by the ad-hoc network at a time corresponding to initiation of the ad-hoc network; at a time after said initiation when the initial frequency hopping sequence has migrated in a non-deterministic way to a current frequency hopping sequence different from the initial frequency hopping sequence, and unknown by the late entrant node, discovering the current frequency hopping sequence by exclusively monitoring at least a first frequency specified by the initial frequency hopping sequence; if the presence of a signal transmitted by a participating node of said ad-hoc network is not detected on at least the first frequency as a result of the exclusive monitoring, iteratively monitoring one or more alternate frequency values in accordance with an ordered list respectively specified for at least the first frequency until detecting the presence of the signal, said signal comprising determining a second frequency included in said current hopping sequence of said network based on the first information contained in said signal.