Patent ID: 7499443
Filing Date: 2009-03-03
Classification: H04L,H04M,H04W

Abstract:
1. A multi-hop wireless adhoc communication system formed of at least three wireless terminals, said multi-hop wireless adhoc communication system comprising: a first wireless terminal for transmitting to a second wireless terminal via a third wireless terminal a frame having an authentication header and a payload, the authentication header having a first encryption and the payload having a second encryption different from the first encryption, said first wireless terminal generating said authentication header by using a first authentication header key corresponding to the first encryption which is known to the third wireless terminal and the second encryption generated using a second encryption key which is not known to the third wireless terminal but is known by the second wireless terminal; and a third wireless terminal for receiving said frame and sending the frame to the second wireless terminal after confirming that said authentication header is valid by selecting and using said first authentication header key corresponding to the first encryption, the third wireless terminal selecting said first authentication header key based on information in a transmission terminal identifier of the frame that indicates that the frame is received from the first wireless device.