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Relay device and method

  • US 9,144,033 B2
  • Filed: 08/09/2012
  • Issued: 09/22/2015
  • Est. Priority Date: 08/19/2011
  • Status: Active Grant
First Claim
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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;

    whereinthe 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;

    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;

    the relay device is operableto measure a received signal power of the access request message of the second type received from the terminal device; and

    to set power control information in the relayed access request message for controlling a power level of a subsequent transmission from the terminal device to the relay device on the allocated uplink resources; and

    the allocation of uplink resources transmitted from the base station to the terminal device comprises the power control information for controlling the transmission power of the subsequent transmission from the terminal device to the relay device.

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