(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2005/0180356 Al
Gillies et al. (43) Pub. Date: Aug. 18,2005
(54) MULTI-CHANNEL WIRELESS BROADCAST PROTOCOL FOR A SELF-ORGANIZING NETWORK
(75) Inventors: Donald W. Gillies, La Jolla, CA (US);
Weilin Wang, La Jolla, CA (US)
CATALYST LAW GROUP, APC
9710 SCRANTON ROAD, SUITE S-170
SAN DIEGO, CA 92121 (US)
(73) Assignee: Graviton, Inc.
(21) Appl. No.: 10/316,621
(22) Filed: Dec. 10, 2002
Related U.S. Application Data
(60) Provisional application No. 60/415,056, filed on Oct. 1, 2002.
The disclosed embodiments ol a media access control (MAC) scheme are devised to solve the hidden node problem for channel-hopping broadcast operations in wireless communication networks. The multi-channel broadcast MAC may be adapted to sense and hop around channel interference, and to perform concurrent sensing and load balancing across a set of channels. A multi-hop routing engine using this packet broadcast operator may allow a plurality of network nodes to organize themselves reliably into a communications network. By routing packets around the troubled areas, the routing engine may heal nodal and link failures. When a node changes location, the routing engine may reorganize the network topology automatically and restore the connectivity between communicating peers.