Patent ID: 9622248
Date: 2017-04-11
CPC Classifications: H04B,H04L,H04W

Claim:
1. A relay device for wirelessly relaying data from a terminal device to a base station, the relay device comprising: a receiver; and a transmitter, responsive to an access request message of a second type being received at the receiver from the terminal device to transmit a relayed access request message to the base station to request the base station to allocate uplink resources to the terminal device; wherein the access request message of the second type is transmitted by the terminal device if no response to a transmitted access request message of a first type is received from the base station; the access request messages of the first type include Random Access Channel preambles selected from a first group of Random Access Channel preambles; the access request messages of the second type include Random Access Channel preambles selected from a second group of Random Access Channel preambles, which are different from the first group of Random Access Channel preambles; and the base station is responsive to either an access request message of the first type received from the terminal device or the relayed access request message from the relay device to transmit an allocation of uplink resources to the terminal device.