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Control method for uplink time advance, base station, and terminal

A technology of timing advance and control method, applied in terminal, uplink timing advance control method and base station field

Active Publication Date: 2012-08-22
新奇点智能科技集团有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] This application provides a control method of uplink timing advance, base station and terminal to solve the problem of large coverage radius communication

Method used

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  • Control method for uplink time advance, base station, and terminal
  • Control method for uplink time advance, base station, and terminal
  • Control method for uplink time advance, base station, and terminal

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Embodiment Construction

[0071] In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0072] refer to figure 1 , is a schematic diagram of different cell radii.

[0073] Such as figure 1 As shown, since the signal transmission in space is delayed, if the UE moves away from the base station during the call, the signal sent from the base station will arrive at the UE "later and later", and at the same time, the UE's signal will also Arriving at the base station "later and later", if the delay is too long, the signal of the UE received by the base station in this time slot overlaps with the time slot in which the base station receives a signal from another UE, causing intersymbol interference.

[0074] To this end, the terminal first sends the uplink PRACH (Physical Random Access Channel, ...

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PUM

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Abstract

The invention provides a control method for uplink time advance, a base station and terminals, which aim at solving the problem of large-coverage-radius communication. The method comprises the following steps of: detecting a random access signal from each terminal; computing uplink transmission delay according to the random access signal, and computing an uplink time adjustment value of the terminal; confirming a delay range of the uplink transmission delay and an adjustment factor / adjustment factor indication information corresponding to the delay range; and sending random access response carrying the uplink time adjustment value and the adjustment factor / adjustment factor indication information to the terminal, and computing the uplink time advance by the terminal according to the uplink time adjustment value and the adjustment factor / adjustment factor indication information. According to the invention, the control on the uplink time advance in a large coverage area is achieved; and further, according to the distances between the terminals and the base station, the base station selects the suitable adjustment factors N for the different terminals requiring to access, therefore, the uplink time advance of each terminal is more accurate.

Description

technical field [0001] The present application relates to mobile communication technology, in particular to a method for controlling an uplink timing advance, a base station, and a terminal. Background technique [0002] After the UE (terminal) is turned on, it first needs to establish synchronization with the cell. Because when the UE accesses, although it can receive the PSS (Primary Synchronization Sequence) / SSS (Secondary Synchronization Sequence) signal of the base station and establish downlink synchronization, it does not know the distance to the base station, which will cause the UE's uplink The transmission cannot reach the base station synchronously, so uplink synchronization needs to be established. Uplink synchronization establishment is usually used in the initial random access process of the system, or after the system loses uplink synchronization during cell handover, the process of re-establishing synchronization also needs to go through the uplink synchroni...

Claims

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Application Information

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IPC IPC(8): H04W56/00H04W74/08
Inventor 宋磊汝聪翀吴群英姜戬
Owner 新奇点智能科技集团有限公司
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