Cross-zone handover method for time division synchronous CDMA multi-frequency-point community cellular network

A technology of code division multiple access and time division synchronization, applied in the field of wireless communication, can solve the problems of co-channel interference, limited spreading gain, communication interruption in handover area, etc., and achieve the effect of ensuring communication quality and reducing the level of co-channel interference

Inactive Publication Date: 2007-08-29
ZTE CORP
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Problems solved by technology

However, in the case of co-frequency networking (neighboring cells use the same frequency point for communication), co-frequency interference still exists in the service time slots of overlapping coverage areas of adjacent cells, and the more cells with overlapping coverage, the greater the co-frequency interference. serious
Although TD-SCDMA adopts CDMA technology in time slots, the application of soft handover technology in TD-SC

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  • Cross-zone handover method for time division synchronous CDMA multi-frequency-point community cellular network
  • Cross-zone handover method for time division synchronous CDMA multi-frequency-point community cellular network
  • Cross-zone handover method for time division synchronous CDMA multi-frequency-point community cellular network

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Embodiment Construction

[0039] Taking the cellular network organized by TD-SCDMA multi-frequency cells as an example, the method of the present invention will be further described in conjunction with the accompanying drawings.

[0040] The present invention is based on the idea of ​​dividing a cell into inner and outer areas, combined with the handover process, through wireless resource (time slot, frequency point, etc.) Users in the cell communicate using mutually orthogonal radio resources to avoid co-channel interference. The TD-SCDMA multi-frequency point cell system of the present invention configures mutually orthogonal wireless resources for adjacent cells through the operation and maintenance background, which is called handover reserved resources hereinafter. The meaning of mutual orthogonality is that the reserved resources or time slots of adjacent cells are staggered from each other, or the frequency points are staggered from each other, or both are staggered.

[0041] In a multi-frequen...

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Abstract

The method includes following steps: configuring radio resources in each sector into two sorts: switching preserved resources, and not switching preserved resources, and making switching preserved resources between each adjacent sector inter orthogonal; when communicating on switching preserved resources of service sector, if terminal detects that SNR of receiving signal in adjacent sector is better than SNR at service sector, then reports the message to base station in service sector; the base station in service sector indicates the user to switch to switching preserved resources in adjacent sector, thus, the adjacent sector becomes service sector of the terminal, and the former service sector becomes adjacent sector so as to accomplish switching across sectors. The invention can reduce level of same frequency interference at edge of sector effectively so as to guarantee communication quality when mobile user is in switching procedure across sectors.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a handover method in a time division synchronous code division multiple access multi-frequency cell cellular network. Background technique [0002] Cellular networking is the most common networking method for wireless communication, and the network topology is shown in Figure 1. Because the network topology resembles a honeycomb structure, it is named cellular network. Each cellular unit in the cellular network represents the coverage area of ​​a base station transceiver, and mobile terminals in this area can establish a wireless communication link with the base station. Multiple transceivers form a network to achieve continuous coverage of an area and provide ubiquitous and continuous wireless communication services for mobile terminals of users. [0003] Figure 2 shows a typical cellular wireless communication system architecture. A typical wireless cellular communicati...

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Application Information

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IPC IPC(8): H04Q7/38H04W36/08H04W36/30
Inventor 吴岩巍
Owner ZTE CORP
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