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US 2012/0057531 A1Published application
Conditional uplink timing alignment in a mobile station device of a radio communication system
AssigneeHuawei Technologies Co., Ltd.
InventorsShohei Yamada, Yasuyuki Kato
Life of this patent
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Abstract
A mobile station device transmits a random access preamble, whose preamble ID is randomly selected by the mobile station device, to a base station device and performs uplink timing alignment based on the synchronization timing deviation information included in a random access response which the base station device transmits in response to the transmitted random access preamble. In an uplink synchronous status, upon receiving the random access response including timing deviation information, the mobile station device ignores the timing deviation information. Otherwise, the mobile station device performs the uplink timing alignment based on the timing deviation information.
Claims8
A radio communication system, comprising:
- a base station device;
- and
- a mobile station device, wherein
- the mobile station device transmits to the base station device a random access preamble and performs uplink timing alignment based on timing deviation information included in a random access response from the base station device, which the base station device transmits in response to the transmitted random access preamble, and
- the base station device receives the random access preamble from the mobile station device and transmits the random access response including the timing deviation information calculated based on reception timing of the random access preamble,
- wherein, in an uplink synchronous status, upon reception of the random access response including the timing deviation information transmitted from the base station device in response to the random access preamble whose preamble ID is randomly selected by the mobile station device, the mobile station device ignores the timing deviation information;
- otherwise, upon reception of the timing deviation information the mobile station device performs the uplink timing alignment based on the timing deviation information.
4 more elements
A mobile station device comprising:
- circuitry which transmits a random access preamble;
- and
- circuitry that receives a random access response to the random access preamble and performs uplink timing alignment based on timing deviation information included in the random access response,
- wherein, in an uplink synchronous status, upon reception of the random access response including the timing deviation information transmitted from a base station device in response to the random access preamble whose preamble ID is randomly selected by the mobile station device, the mobile station device ignores the timing deviation information;
- otherwise, upon reception of the timing deviation information the mobile station device performs the uplink timing alignment based on the timing deviation information.
2 more elements
A radio communication system comprising:
- a mobile station device which performs uplink timing alignment based on timing deviation information received from a base station device, and
- the base station device which transmits the timing deviation information to the mobile station device,
- wherein, during a period that a timer which starts timekeeping after receiving the timing deviation information has not expired, and upon reception from the base station device of a random access response to a random access preamble whose preamble ID is randomly selected, the mobile station device ignores the timing deviation information;
- otherwise, upon reception of the timing deviation information the mobile station device performs the uplink timing alignment based on the timing deviation information included in the random access response.
1 more element
A mobile station device comprising:
- circuitry configured to perform uplink timing alignment based on timing deviation information received from a base station device,
- wherein, during a period that a timer which starts timekeeping after receiving the timing deviation information has not expired, and upon reception from the base station of a random access response to a random access preamble whose preamble ID is randomly selected, the mobile station device ignores the timing deviation information;
- otherwise, upon reception of the timing deviation information the mobile station device performs the uplink timing alignment based on the timing deviation information included in the random access response.
A processing method of a mobile station device, comprising:
- transmitting a random access preamble to a base station device;
- receiving from the base station device a random access response to the transmitted random access preamble;
- and
- performing uplink timing alignment based on timing deviation information included in the random access response,
- wherein, in an uplink synchronous status, upon reception of the random access response including timing deviation information transmitted from the base station device in response to the random access preamble whose preamble ID is randomly selected by the mobile station device, the mobile station device ignores the timing deviation information;
- otherwise, upon reception of the timing deviation information the mobile station device performs uplink timing alignment based on the timing deviation information.
3 more elements
A processing method of a mobile station device, comprising:
- performing uplink timing alignment based on timing deviation information received from a base station device,
- wherein, during a period that a timer which starts timekeeping after receiving the timing deviation information has not expired, and upon reception from the base station of a random access response to a random access preamble whose preamble ID is randomly selected, the mobile station device ignores the timing deviation information;
- otherwise, upon reception of the timing deviation information the mobile station device performs uplink timing alignment based on the timing deviation information included in the random access response.
Dependencies are inferred from the claim text.