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User equipment and method for determining TA (Timing Advance) value by using same

A technology of user equipment and predetermined value, applied in the direction of electrical components, wireless communication, synchronization devices, etc., can solve the problems of large number of M2M network random access, network congestion, affecting the quality of M2M service communication, etc., and achieve the effect of avoiding RA congestion

Inactive Publication Date: 2015-07-01
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the number of such terminals in the M2M network is large, the number of random access in the M2M network will be large, which may cause RA congestion in the network, thereby affecting the communication quality of the M2M service

Method used

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  • User equipment and method for determining TA (Timing Advance) value by using same
  • User equipment and method for determining TA (Timing Advance) value by using same
  • User equipment and method for determining TA (Timing Advance) value by using same

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Embodiment Construction

[0013] The present application will be described below in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0014] figure 1 A flowchart of a method 100 according to an exemplary embodiment of the present application is shown.

[0015] As mentioned above, the UE obtains the TA value from the base station in the connected state, and saves the obtained TA value. according to figure 1 In the embodiment shown, when the UE changes from the connected state RRC-Connected to the idle state RRC-Idle, in step S101, the UE starts a local virtual synchronization sequence. Specifically, when the UE acquires the first downlink synchronization after it changes from the connected state to the idle state, it starts the local virtual synchronization sequence. The first time point of this timing is aligned with the captured downstream synchronization timing. The clock cycle of this sequence is consistent with the wireless frame of the downlink synchronizati...

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Abstract

The invention discloses a method for determining a TA (Timing Advance) value by using user equipment, comprising the following steps of: starting a local virtual synchronous time sequence for the idle user equipment; and when the user equipment transforms from an idle state into a connection state, based on the local virtual synchronous time sequence and a captured downlink synchronous time sequence, determining whether updating for the TA value stored in the user equipment is needed or not.

Description

technical field [0001] The present application relates to the field of wireless communication, in particular to a user equipment in a mobile communication network and a method for determining a TA value by using the user equipment. Background technique [0002] In a mobile communication system, in order to compensate for the transmission delay caused by the distance between the base station and the mobile device, a time value is required for compensation, and this value is called a TA (Timing Advance, timing advance) value. The TA value is notified by the base station to mobile equipment such as UE (User Equipment, user equipment), and stored by the UE. [0003] In the LTE system, when the UE in the idle state RRC-Idle changes to the connected state RRC-Connected, the current TA value is reacquired through an RA (Random Access, random access) process. In the connected state RRC-Connected, the base station continuously updates the TA value to keep the TA value valid. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W8/24H04W56/00
Inventor 王军胡南王竞谢芳胡臻平
Owner CHINA MOBILE COMM GRP CO LTD