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Mobile communication system, mobile station, base station and timing adjustment method

A technology of a mobile communication system and an adjustment method, which is applied in the field of mobile communication systems, mobile stations, base stations, and timing adjustments, can solve problems such as poor adjustment of transmission timing, and achieve the effects of reducing delay time and solving bad conditions

Active Publication Date: 2014-02-05
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In the prior art, during the process of random access (in the middle of execution), problems may occur in the adjustment of the transmission timing due to the expiration of the validity period of the transmission timing adjustment information, etc.

Method used

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  • Mobile communication system, mobile station, base station and timing adjustment method
  • Mobile communication system, mobile station, base station and timing adjustment method
  • Mobile communication system, mobile station, base station and timing adjustment method

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no. 2 Embodiment approach

[0189] In the first embodiment described above, it is assumed that the TA timer 251 of the UE 20 times out during the period between the transmission of the message #3 from the UE 20 and the reception of the message #4 from the eNB 10. In this embodiment, it is assumed that the TA timer 251 of the UE 20 times out during the period from when the UE 20 receives the message #2 from the eNB 10 to when the message #3 is transmitted to the eNB 10.

[0190] For example, such as Figure 21 ~ Figure 23 , Figure 25 ~ Figure 27 as well as Figure 30 ~ Figure 32 As illustrated, when the DL data transmitted to the UE 20 arrives at the eNB 10 and the UE 20 is notified of an incoming call (processing 1010), contention-based random access is performed (transmission of message #1: processing 1011). In this case, when the UE20 that has received the TA value (TA#2) from the eNB10 via the message #2 ignores the TA#2, it may transmit a message #3 (signal containing S-TMSI as an example of the identif...

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Abstract

The invention provides a mobile communication system, a mobile station, a base station and a timing adjustment method. The mobile station (20) conducts connection processing on the base station (10) according to first sending timing adjustment information (TA#1); in a connection processing procedure, when second sending timing adjustment information (TA#2) is received, the information (TA#1) is applied to sending timing adjustment as for sending processing before the valid period of the first sending timing adjustment information (TA#1), and the second sending timing adjustment information (TA#2) is applied to sending timing adjustment as for sending processing after the valid period of the information (TA#1).

Description

[0001] This application is a subdivision of the invention patent application with application number 200880129608.7 (international application number: PCT / JP2008 / 060151, application date: June 02, 2008, title of invention: timing adjustment method, mobile station, base station, and mobile communication system) Case application. Technical field [0002] The invention relates to a timing adjustment method, a mobile station, a base station and a mobile communication system. The present invention is sometimes used for uplink (uplink: UL) communication control of a wireless (mobile) communication system. Background technique [0003] As a wireless (mobile) communication system that includes wireless terminals (mobile stations) such as mobile phones, a third-generation mobile communication service using code division multiple access (CDMA: code division multiple access) is currently provided. On the other hand, a next-generation mobile communication method capable of higher-speed commu...

Claims

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Application Information

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IPC IPC(8): H04W56/00
Inventor 太田好明田岛喜晴小林豊大渕一央
Owner FUJITSU LTD