CONDITIONAL UPLINK TIMING ALIGNMENT IN A MOBILE STATION DEVICE OF A RADIO COMMUNICATION SYSTEM
A mobile station device transmits a random access preamble to a base station device. The base station device receives the random access preamble from the mobile station device and transmits, to the mobile station device, a Random Access-Radio Network Temporary Identity (RA-RNTI) which notifies a resource assignment of a random access response. The mobile station device further monitors downlink control channels while detecting both a Cell-Radio Network Temporary Identity (C-RNTI) and the RA-RNTI, in which a downlink control channel includes the RA-RNTI and a downlink control channel includes the C-RNTI which notifies a resource assignment of downlink data. Upon detection of the C-RNTI and the RA-RNTI in a same sub-frame, the mobile station receives both the random access response and the downlink data, or receives either the random access response or the downlink data.
1 . An apparatus comprising:
at least one processor; and
a non-transitory computer readable storage medium storing programming for execution by the at least one processor, the programming including instruction to:
ignore, in an uplink synchronous status, a timing deviation information included in a random access response, wherein the random access response corresponds to a random access preamble whose preamble ID was randomly selected by the apparatus; and
apply, in an uplink asynchronous status, the timing deviation information included in the random access response.
2 . The apparatus according to claim 1 , wherein the apparatus further comprises:
a transmitter configured to transmit the random access preamble; and
a receiver configured to receive the random access response corresponding to the random access preamble.
3 . The apparatus according to claim 1 , wherein the programming further includes instruction to:
in the uplink synchronous status, not perform uplink timing alignment based on the timing deviation information included in the random access response.
4 . The apparatus according to claim 1 , wherein the programming further includes instruction to:
in the uplink synchronous status, not reset a timer based on the timing deviation information included in the random access response.
5 . The apparatus according to claim 4 , wherein the programming further includes instruction to:
manage the uplink synchronous status by using the timer wherein the uplink synchronous status is sustained until the timer expires.
6 . A method executed by an apparatus comprising:
ignoring, in an uplink synchronous status, a timing deviation information included in a random access response, wherein the random access response corresponds to a random access preamble whose preamble ID was randomly selected by the apparatus; and
applying, in an uplink asynchronous status, the timing deviation information included in the random access response.
7 . The method according to claim 6 , further comprising:
transmitting the random access preamble; and
receiving the random access response corresponding to the random access preamble.
8 . The method according to claim 6 , further comprising:
in the uplink synchronous status, not performing uplink timing alignment based on the timing deviation information included in the random access response.
9 . The method according to claim 6 , further comprising:
in the uplink synchronous status, not resetting a timer based on the timing deviation information included in the random access response.
10 . The method according to claim 9 , further comprising:
manage the uplink synchronous status by using the timer wherein the uplink synchronous status is sustained until the timer expires.
11 . A non-transitory computer-readable storage medium comprising instructions, that when executed by a processor, cause the processor to:
ignore, in an uplink synchronous status, a timing deviation information included in a random access response, wherein the random access response corresponds to a random access preamble whose preamble ID was randomly selected by the apparatus; and
apply, in an uplink asynchronous status, the timing deviation information included in the random access response.
12 . The non-transitory computer-readable storage medium according to claim 11 , further causing the processor to:
transmit the random access preamble; and
receive the random access response corresponding to the random access preamble.
13 . The non-transitory computer-readable storage medium according to claim 11 , further causing the processor to:
in the uplink synchronous status, not performing uplink timing alignment based on the timing deviation information included in the random access response.
14 . The non-transitory computer-readable storage medium according to claim 11 , further causing the processor to:
in the uplink synchronous status, not resetting a timer based on the timing deviation information included in the random access response.
15 . The non-transitory computer-readable storage medium according to claim 14 , further causing the processor to:
manage the uplink synchronous status by using the timer wherein the uplink synchronous status is sustained until the timer expires.