US 8,885,583 B2
Conditional uplink timing alignment in a mobile station device of a radio communication systemGeneral
US 8,885,583 B2
Conditional uplink timing alignment in a mobile station device of a radio communication system
Tech Center:
2400 Networking, Multiplexing, Cable, and Security
Examiner:
Habte Mered
Art Unit:
2474 Multiplex and VoIP
Agent:
Inventors:
Shohei Yamada; Yasuyuki Kato
Assignee:
UERAN TECHNOLOGY LLC
Priority:
08/08/07
Filed:
11/08/11
Granted:
11/11/14
Expiration:
08/07/28
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.
Cooperative Patent Classification (CPC)
H04H04W74/0833H04W