Patent ID: 8107408
Filing Date: 2012-01-31
Classification: H04W

Abstract:
1. A method for route maintenance in a wireless network having at least a base station, a relay station and a mobile station, comprising: identifying each connection between the base station and the relay station and between the base station and the mobile station with a connection identifier based on packets received by the base station; creating a cache including connection identifiers and routing information based on the identified connections; transmitting the cache to the relay station within a downlink packet transmission; receiving the packets at the relay station; detecting and forwarding the packets in accordance with the connection identifiers and routing information included in the cache; setting at least one time-out associated with one of the connection identifiers when the cache is transmitted within the downlink packet transmission; resetting the time-out based on receiving an uplink packet; and deleting at least one connection identifier from the cache based on an expiration of the timeout associated with the at least one connection identifier.