Patent ID: 8493956
Filing Date: 2013-07-23
Classification: H04W

Abstract:
1. A method of operating a first mobile communications device to communicate with a second mobile communications device in a peer-to-peer system during a plurality of transmission intervals, each transmission interval communicating at least one symbol, a first pair of said transmission intervals corresponding to a first pair of mobile communications devices, said first pair of mobile communications devices including said first and second mobile communications devices, the first and second mobile communications devices having an existing connection, said first pair of transmission intervals including a first transmission interval corresponding to the first mobile communications device and a second transmission interval corresponding to the second mobile communications device, the first and second transmission intervals being non-overlapping in time, the first transmission interval preceding the second transmission interval, the method comprising: transmitting on a first transmission frequency spectrum during the first transmission interval a signal indicating a request to transmit to said second mobile communications device; monitoring during the second transmission interval to detect a signal from the second mobile communications device; and when a signal from the second mobile communications device is not detected during the second transmission interval, transmitting data in a data transmission interval to the second mobile communications device, said data transmission interval occurring after said second transmission interval.