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Switching method and base station controller (BSC)

A base station controller and hard handover technology, which is applied in the field of wireless communication, can solve the problems of high call drop rate, unreasonable, and inability to realize the combination of source and target cell signals, and achieve the effect of safe hard handover and saving interface resources

Inactive Publication Date: 2011-08-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this soft handover method is that when the mobile terminal has left the coverage of the source BSC, it still occupies the resources of the source BSC (the source BSC performs diversity combining, encoding and decoding, and the source BSC provides the communication between the BSC and the MSC required for the call. link resources), which is unreasonable to a certain extent. If the junction of the source BSC and the target BSC is in a densely populated area, a large amount of available A3 / A7 resources are required to meet the switching capacity requirements
The second inter-BSC handover method is a standard hard handover. The source BSC and the target BSC complete the handover through one or more MSC (Mobile Switching Center, Mobile Switching Center) relay handover signaling. Due to well-known reasons, the hard handover process cannot Combine the signals of the source and target cells to form interference with each other, resulting in a low success rate of hard handover and a high call drop rate

Method used

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  • Switching method and base station controller (BSC)
  • Switching method and base station controller (BSC)
  • Switching method and base station controller (BSC)

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Embodiment Construction

[0039] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0040] The basic idea of ​​the present invention is to combine the soft handover and the hard handover, and perform the soft handover first, and then perform the hard handover.

[0041] Specifically, during an MS (Mobile Station, mobile terminal) call process, when a handover between BSCs is required, the source BSC and the target BSC use the A3 and A7 interfaces to perform soft handover between BSCs;

[0042] When the source BSC determines that the call meets the hard handover condition, it initiates a hard handover between the source BSC and the target BSC, and hard switches the call to the target BSC through one or more MSCs.

[0043] The aforementioned soft handover is the ...

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Abstract

The invention discloses a switching method and a base station controller (BSC). The method comprises the following steps that: a source BSC and a target BSC perform a soft switch between the source BSC and the target BSC by using an A3 interface and an A7 interface when a switch is needed between BSCs during the calling of a mobile station (MS); the source BSC initializes a hard switch between the source BSC and the target BSC when determining that the call meets the hard switch requirement, and switches the call to the target BSC in a hard switch manner through one or more mobile switching centers (MSC). According to the invention, a safe hard switch is realized by combining a soft switch and a hard switch; besides, A3 and A7 interface resources are saved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a switching method and a BSC (Base Station Controller, base station controller). Background technique [0002] In a CDMA (Code Division Multiple Access, Code Division Multiple Access) network, in order to ensure the continuity of calls of mobile terminal users, handover is essential, and the success rate of handover also directly affects the communication quality and user perception. [0003] Currently, there are two main types of inter-BSC handovers commonly used in CDMA2000 1x networks, inter-BSC soft handover (A3 / A7), and inter-BSC hard handover. During A3 / A7 handover between BSCs, the target BSC sends the received mobile phone signals to the source BSC through the A3 / A7 interface, and the source BSC performs diversity combination of the air interface signals, and the source BSC sends the downlink air interface signals to the The target BSC sends it to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/10H04W36/18
Inventor 李鄂
Owner ZTE CORP