UPLINK TIMING RECOVERY
A method of controlling an uplink timing recovery within a mobile radio communications device operating within a mobile radio communications network includes determining a requirement for the uplink timing recovery in a manner responsive to a velocity of a movement of the mobile radio communications device, in which a determination of the velocity of the movement of the mobile radio communications device is achieved by a determination of a timing offset within downlink signaling.
1 . A method of controlling an uplink timing recovery within a mobile radio communications device operating within a mobile radio communications network, said method including:
determining a requirement for the uplink timing recovery in a manner responsive to a velocity of a movement of the mobile radio communications device.
2 . A method as claimed in claim 1 , wherein a determination of the velocity of the movement of the mobile radio communications device is achieved by way of a determination of a timing offset within downlink signaling.
3 . A method as claimed in claim 2 , further including:
measuring a downlink reference signal in order to identify the timing offset.
4 . A method as claimed in claim 3 , wherein the timing offset serves as an indication of a change in a timing advance.
5 . A method as claimed in claim 4 , wherein the timing offset corresponds to 50% of a magnitude of the change in the timing advance.
6 . A method as claimed in claim 1 , further including:
comparing the timing offset with a threshold value.
7 . A method as claimed in claim 6 , wherein the threshold value is broadcast from the network to the mobile radio communications device within a BCH.
8 . A method as claimed in claim 6 , wherein the threshold value is delivered to the mobile radio communications device during a Radio Resource Control establishment.
9 . A method as claimed in claim 1 , further including:
generating an indication of an uplink timing loss at the mobile radio communications device.
10 . A method as claimed in claim 9 , wherein the indication comprises a signaling flag.
11 . A method as claimed in claim 1 , wherein the method is provided while the mobile radio communications device is within a continuous reception mode.
12 . A method as claimed in claim 1 , wherein the method is provided while the mobile radio communications device is operating within a discontinuous reception mode.
13 . A mobile radio communications device for operation within a mobile radio communications network, said mobile radio communications device including:
a unit arranged to control an uplink timing recovery, the unit being arranged to determine a requirement for the uplink timing recovery responsive to a velocity of a movement of the mobile radio communications device.
14 . A mobile radio communications device as claimed in claim 13 , wherein a determination of the velocity of the movement of the mobile radio communications device is achieved by way of a determination of a timing offset within downlink signaling.
15 . A mobile radio communications device as claimed in claim 14 , wherein the mobile radio communications device is arranged to measure downlink reference signals in order to identify the timing offset.
16 . A mobile radio communication device as claimed in claim 14 , wherein the mobile radio communications device is arranged to compare the timing offset with a threshold value.
17 . A mobile radio communications device as claimed in claim 13 , wherein the mobile radio communications device is arranged to generate an indication of an uplink timing loss at the mobile radio communications device.
18 . A method of controlling an uplink timing recovery within a mobile radio communications device operating within a mobile radio communications network, said method including:
determining a requirement for the uplink timing recovery in a manner responsive to a velocity of a movement of the mobile radio communications device.
19 . The method of claim 18 , wherein a determination of the velocity of the movement of the mobile radio communications device is achieved by a determination of a timing offset within downlink signaling.