Patent ID: 9198163
Filing Date: 2015-11-24
Classification: H04L,H04W

Abstract:
1. A system comprising a source node and a relay node, the relay node being configured to perform energy sensing of a radio spectrum to provide first sensing data indicating the availability of a signal channel at the relay node, the source node being configured to perform energy sensing of the radio spectrum to provide second sensing data indicating the availability of the signal channel at the source node, wherein one or other of the relay node and source node is configured to generate a channel availability parameter based on the first or second sensing data, respectively, the channel availability parameter comprising a smaller number of bits of information than whichever of the first or second sensing data is used to generate the channel availability parameter, the source node being configured to determine whether to send message information to the relay node based on a sensing result obtained by combining the channel availability parameter with whichever one of the first and second sensing data is not used to generate the channel availability parameter.