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Air interface synchronization method, base station, control device and wireless communication system

A technology for air interface synchronization and base station, which is applied in synchronization devices, wireless communication, radio transmission systems, etc., and can solve the problems of high construction cost and high maintenance cost.

Active Publication Date: 2017-06-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The implementation of the present invention provides a processing method, device and wireless communication system for realizing time synchronization of air interfaces between base stations, so as to solve the problems of high construction cost and high maintenance cost existing in the time synchronization between base stations using GPS

Method used

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  • Air interface synchronization method, base station, control device and wireless communication system
  • Air interface synchronization method, base station, control device and wireless communication system
  • Air interface synchronization method, base station, control device and wireless communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] image 3 It is the processing method of the centralized controller in the air interface synchronization solution provided by the embodiment of the present invention, and is described in detail as follows.

[0090] S301. Acquire at least one time difference, where the time difference is a time difference between a first base station and a second base station.

[0091] At least one time difference includes the first time difference. The first time difference is the first time difference between the first base station and the second base station obtained by using the active random access of the first UE. Active random access can also be called uplink resynchronization, which belongs to non-contention random access. The first time difference may be the time difference between the first base station and the second base station calculated by the first base station according to the first receiving moment and the second receiving moment, where the first receiving moment is the...

Embodiment 2

[0117] exist figure 1 In the shown wireless communication system, the process of time synchronization of air interfaces between base stations through active random access of user equipment is described in detail as follows.

[0118] Figure 6 It is a method for acquiring a time difference between base stations provided by an embodiment of the present invention, and is described as follows.

[0119] S601. The centralized controller sends a time difference request message to the first base station. The centralized controller can send the time difference request message to the first base station at regular intervals, or according to the load condition or business condition of the first base station, when the load of the first base station is lower than the load threshold , sending a time difference request message to the first base station, or sending a time difference request message to the first base station according to system requirements.

[0120] S602(a). After receiving ...

Embodiment 3

[0156] see figure 1 , the centralized controller 101 is independent of the base station, the serving base station of the first UE103a is the base station 102a, the serving base station of the second UE103b is the base station 102b, and the first UE103a and the second UE103b are at the edge of the base station. The base station 102a and the base station 102b are adjacent base stations to each other. The air interface time synchronization process is described in detail as follows.

[0157] The centralized controller 101 sends a time difference request message to the base station 102a and / or the base station 102b.

[0158] The processing procedure after the base station 102a acquires the time difference request message sent by the centralized controller 101 is the same as the description in Embodiment 2. During the processing, the base station 102a serves as the first base station, and the base station 102b serves as the second base station.

[0159] The processing procedure af...

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Abstract

The present invention discloses an air-interface-based synchronization method, a base station and its control apparatus, and a wireless communications system. By taking advantage of active random access of user equipment, a time difference between base stations is acquired by detecting a random access preamble, and a time adjustment value of a non-reference base station is acquired according to the acquired time difference and reference time of a reference base station; and the non-reference base station performs time adjustment according to the acquired time adjustment value, to complete time synchronization with the reference base station. The present invention can easily and effectively implement air-interface-based synchronization between base stations by using an existing wireless network, thereby achieving a technical effect in a convenient and economic manner.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an air interface synchronization method, a base station, a control device and a wireless communication system. Background technique [0002] With the increasing demand for wireless network capacity, in order to obtain higher network capacity, site deployment is more intensive. For the Long Term Evolution (LTE) system, whether it is a Homogenous Network (HomNet) or a Heterogeneous Network (HomNet), due to the denser site deployment, the interference between cells is more serious, and the The user throughput drops, and in severe cases, it affects the normal work of edge users. The staggering of edge user resources can solve the problem of inter-cell interference. The existing practice is to use inter-cell time-domain interference coordination, and realize inter-cell interference staggering by coordinating the use of subframes between different cells. Specifically, it is rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W88/08
CPCH04W56/0015H04B7/2696H04W56/0055H04W88/08H04W88/12
Inventor 胡军
Owner HUAWEI TECH CO LTD