Method for realizing cross-zone handoff in TD-SCDMA multi-frequency point cell

Abstract

A method to realize interval switch in TD-SCDMA multi-frequent dot section is disclosed, the terminal station detects the receiving power of P-CCPCH in service section and adjacent sections, and evaluates the signal-to-noise ratio of service channel based on the receiving power of P-CCPCH; and decide to switch according to the state of signal-to-noise ratio. The invention uses the characteristicsof TD-SCDMA multi-frequent dot section, and the wireless source of TD-SCDMA is divided by time, and the co-frequency interference are produced on the boundary of honeycomb section, it can reduce the co-frequency interference effectively to ensure the communication quality when the mobile user does interval switch.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a handover method in a TD-SCDMA cellular network. Background technique [0002] Cellular networking is the most common networking method for wireless communication. The network topology is as follows: figure 1 shown. 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 the terminal stations 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 user terminal stations. [0003] figure 2 A typical cellular wireless communication system architecture is given. A typical wireless cellular communication system usually includes a base station system (inclu...

AI Technical Summary

Problems solved by technology

However, in the case of co-frequency networking (adjacent cells use the same frequency point for communication), co-frequency interference still exists in the business time slots in the overlapping coverage areas of adjacent cells. serious

Although TD-SCDMA uses CDMA technology in time slots, due to the limited spread spectrum gain in each time slot, and TDD system requires strict synchronization of uplink and downlink, TD-SCDMA network cannot use soft handover technology

Therefore, in a wireless network composed of multi-frequency cells, the same-frequency interference received by service time slots at the cell border will seriously affect the communication quality of mobile users, and even cause communication interruption in the handover area.

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