Method for timing adjustment, mobile station, base station, and mobile communication system

A technology of a mobile communication system and an adjustment method, which is applied in the field of uplink communication control, 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: 2011-05-04
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In the prior art, in 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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  • Method for timing adjustment, mobile station, base station, and mobile communication system
  • Method for timing adjustment, mobile station, base station, and mobile communication system
  • Method for timing adjustment, mobile station, base station, and mobile communication system

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Experimental program
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no. 2 Embodiment approach

[0188] 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 .

[0189] 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 the UE 20 that has received the TA value (TA#2) from the eNB 10 in the message #2 ignores the TA#2, it may transmit the message #3 (including S- TMSI signal) before the TA timer 251 times out.

[0190] In this case, the UE 20 (UL ...

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Abstract

In performing a handling operation for connection with a base station (10) in accordance with first transmission timing adjustment information (TA#1), when a mobile station (20) receives second transmission timing adjustment information (TA#2) in the course of its connection handling process, the mobile station applies the first transmission timing adjustment information (TA#1) to the transmission timing adjustment for a transmission handling within a valid time limit for the information (TA#1), while applying the second transmission timing adjustment information (TA#2) to the transmission timing adjustment for a transmission handling past a valid time limit for the information (TA#1).

Description

technical field [0001] 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 [0002] 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 higher-speed communication is also studied. In the 3rd Generation Partnership Project (3GPP: 3rd Generation Partnership Project), research on a next-generation mobile communication system is being conducted as a long-term evolution (LTE: Long Term Evolution). [0003] In a mobile communication system, when a radio base station (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00
CPCH04W56/0045H04W76/10H04W72/044H04W72/21H04W88/02H04W56/001
Inventor 太田好明田岛喜晴小林豊大渕一央
Owner FUJITSU LTD
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