CDMA wireless network optimization process and method (1)

Overview

The CDMA system is a self-interference system. A user is interference with other users. Each cell also interferes with other cells, especially adjacent areas with the same carrier frequency. At the same time, the residential area has the breathing function. The higher the network load, the larger the interference, and the smaller the coverage. The smaller the network load, the smaller the interference, and the wider the coverage, the coverage and capacity of the network change at any time. The capacity of each slice is a soft capacity. Therefore, the CDMA-based network regulation network is much more complex than the GSM-based network regulation network. The system performance can be improved without adding a few base stations. Therefore, power control is particularly important in CDMA networks. It is also the core of CDMA. It effectively solves the "near-far effect" through power control ". Therefore, the CDMA system itself is a power control system. The link performance and system capacity depend on the degree of interference power control. Therefore, Interference Analysis, power configuration, and switching planning are necessary. However, due to the mutual constraints of various factors, it is often a trigger. For example, soft switchover can reduce the call-down rate during user switchover. However, when a user performs soft switchover, it can also establish a business channel with multiple base stations in the active set, in this way, the resources of multiple base stations are occupied, which means the network capacity is wasted. Therefore, many features need to be taken into account in the network planning and optimization process.

Optimization process

Wireless network optimization is divided into two phases: Engineering Optimization, that is, optimization during network construction, mainly optimization at the initial stage of network construction and after expansion, which focuses on the overall performance of the entire network; second, O & M optimization is the optimization in the network operation process, that is, the daily optimization. By integrating OMC, on-site testing, complaints, and other information, comprehensively analyzes and locates various problems and causes that affect network quality, and focuses on troubleshooting in some regions and improving single-site performance.

1. Engineering Optimization

The purpose of engineering optimization is to expand the network coverage area, reduce the call drop rate, reduce the call start and call failure rate, provide stable switching, reduce unnecessary soft switching, and improve the usage of system resources, increase system capacity to meet RF testing performance requirements.

The main process of Engineering Optimization is as follows:

Figure 1 Engineering Optimization Flowchart