Patent ID: 8169925

Claim:
A wireless device to operate in a multi-hop network, comprising: a transceiver to receive a Frame Control Header (FCH); and a processor to maintain a record of a mapping between FCH locations and preamble sequence sets, where the FCH contains a DL Frame Prefix (DLFP) mapped to the FCH that is a data structure that contains information regarding the current frame and more than three FCHs are located at more than three different subchannels based on a segment number, and wherein a location of the received FCH is assigned to another wireless device in the multi-hop network wherein the wireless devices share the same FCH due to reduced interference provided by spatial separation between the wireless devices, the processor to set a limit to a number of distinct FCH locations and a number of preamble sequence sets, wherein the record shows the limit is exceeded and assigns the same FCH location to Relay Stations (RSs) that are far away from each other to take advantage of reduced interference from spatial separation.