Patent ID: 7760697
Filing Date: 2010-07-20
Classification: H04B

Abstract:
1. A method of operating a first node in a communications network comprising: communicating, by the first node, in a secure communications network with a second node by using a first channel X as an uplink channel and a second channel Y as a downlink channel; transmitting, by the first node, a discovery burst on the second channel Y when it is determined that communications with the second node are fading; and receiving, at the first node, from a third node a grant of access to the secure communications network and re-establishing communications in the secure communications network through the third node using the first channel X as a downlink channel and the second channel Y as an uplink channel, wherein after sending to the first node the grant of access, the third node operates as relay between the second node and the first node by: relaying traffic that is received from the first node on the second channel Y to the third node on the first channel X and relaying traffic that is received from the third node on the second channel Y to the first node on the first channel X.