How to smoothly evolve GSM to WCDMA (1)

The traditional GSM network operator has a wide coverage of the GSM network and a large user base. It is very important to smoothly evolve the 2G network to the 3G network, GSM carriers must maintain their network coverage and user advantages, and minimize the adverse effects caused by the introduction of 3G.

This article proposes several suggestions on smooth evolution from a GSM network to a WCDMA network in terms of network structure, economic benefits, and market development.

I. Differences Between WCDMA wireless design and GSM

1. GSM wireless design goals and implementation methods include:

Coverage-the cell radius and capacity are not closely related;

Capacity-Frequency Multiplexing is related to hardware;

Service quality-must meet minimum C/I requirements;

The wireless system is designed to plan the Frequency Based on the capacity.

2. WCDMA wireless design goals and implementation methods:

Coverage-the cell radius is closely related to the capacity;

Capacity-not only related to hardware;

Service quality-various services must meet the Eb/No requirements;

System design balances coverage and capacity.

Ii. smooth evolution of GSM devices to WCDMA

1. Construction of WCDMA can make full use of existing GSM Site Resources

In order to shorten the deployment cycle and reduce investment, operators should make full use of existing GSM Site Resources for construction of WCDMA networks. Unlike CDMA, WCDMA base stations do not need to adopt GPS synchronization, and site selection is more flexible, as shown in figure 1.

Figure 1 construction of WCDMA base station using existing GSM site

2. Introduction of the "zero land occupation" technology to reduce the total cost of ownership TCO

The zero-footprint solution based on 2G systems is a comprehensive and multi-standard solution for operators. 2.

Figure 2 advantages of "zero land occupation solution"

Iii. Suggestions on WCDMA deployment

China's three major carriers all hope to take full advantage of the 3G Evolution opportunity to establish a leading position in the 3G field. In the 3G field, WCDMA/HSPA is currently the most competitive.

I have some suggestions on the evolution of two G/3G networks for GSM carriers.

1. Use EDGE technology to first improve the data transmission capability of 2G networks.

2. Use 2G networks to provide coverage for 3G networks, and further improve the coverage of MHz, especially in rural areas and mountainous areas.

In rural areas and villages and towns, operators should insist on enhanced network coverage by using GSM900MHz. In terms of station spacing, <5 km in normal rural areas, <3 km in developed rural areas, <1 km in high-speed trains, <2 km in high-speed trains, and <1 km in Township and county towns <in high-speed trains. In terms of RF equipment, high-speed rail coverage is achieved by using high-power carrier modules, 4-Emission sub-poles, TMA, and distributed optical fiber direct release stations.

3. In the initial phase of 3G operation, 3G users should try to use 3G networks to avoid interoperability problems caused by business and capacity.