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Timing adjustment method, mobile station, base station and mobile communication system

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

Active Publication Date: 2013-07-31
FUJITSU LTD
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  • 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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  • Timing adjustment method, mobile station, base station and mobile communication system
  • Timing adjustment method, mobile station, base station and mobile communication system
  • Timing adjustment method, mobile station, base station and mobile communication system

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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 from when the UE 20 transmits the message #3 to when the eNB 10 receives the message #4. 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 it transmits the message #3 to the eNB 10 .

[0190] For example, if Figure 21 ~ Figure 23 , Figure 25 ~ Figure 27 as well as Figure 30 ~ Figure 32 As illustrated, when DL data transmitted to UE 20 arrives at eNB 10 to notify UE 20 of an incoming call (process 1010 ), contention-based random access is performed (transmission of message #1: process 1011 ). In this case, when UE20, which receives the TA value (TA#2) from eNB10 in message #2, ignores TA#2, it may transmit message #3 (a signal including S-TMSI as an example of identification information of UE20). ) before the TA timer 251 times out.

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Abstract

The invention provides a timing adjustment method, a mobile station, a base station and a mobile communication system. Under the condition that the mobile station (20) conducts connecting processing on the base station (10) according to first sending timing adjustment information (TA#1), during a course of the connecting processing, when second sending timing adjustment information (TA#2) is received, the information (TA#1) is applicable to adjustment of sending timing for sending processing before a valid period of the first sending timing adjustment information (TA#1), and the second sending timing adjustment information (TA#2) is applicable to the adjustment of the sending timing for the sending processing after the valid period of the information(TA#1).

Description

[0001] This application is an invention patent application with the original application number No. 200880129608.7 (international application number: PCT / JP2008 / 060151, application date: June 2, 2008, invention name: timing adjustment method, mobile station, base station and mobile communication system ) divisional 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 including wireless terminals (mobile stations) such as mobile phones, a third-generation mobile communication service using a code division multiple access (CDMA: code division multiple access) method is currently provided. On the other hand, the next-generation mobile communication system that can perform...

Claims

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Application Information

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