Research On The Key Issuess Of H City TD-SCDMA System Wireless Network Planning

TD-SCDMA (Time Division-Synchronous Code Division Multiple Access)standard is the first Chinese made to our IP-based, has been internationally recognized third-generation mobile communications standards.It has high spectrum efficiency, support non-symmetrical operations, uplink and downlink channels of frequency bands and other technical advantages.As a young technology, to the highly competitive communications industry stand out, network design will be a very important process, it will even affect the outcome of the network operator's business success.If the network planning properly, the system will decrease the quality of services, call outage probability increase or decrease the system throughput and reduce the retransmission rate and blocking rate increases, etc.This will lead to customer complaints increase, enabling operators to reduce benefits. So good network design can improve network service levels and increase the economic operators.With the end of TD Phase II, Phase III also has entered the preparation stage,China Mobile's plan is to cover all of the country at the end of 2011 cities, which requires our city such as H network planning for medium and small cities.However, such a huge network construction costs are also placed in front of us.China Mobile also GSM and TD-SCDMA has the right to operate, and GSM network already has 10 years of development, whether it is network coverage or site for resources, have a great advantage.China Mobile can take advantage of the existing GSM system, a large network of resources, a total station construction, using the original room, tower mast and the surface to develop TD-day networking, sharing of resources.This can not only solve the difficulties of site acquisition problems, and can save a lot of construction investment CAPEX (Capital Expense) and the operation and maintenance costs of OPEX (Operating Expenditure cost), to avoid duplication and waste of resources to substantially increase the utilization of existing investments and increase economic efficiency.Total points in the two systems, there is certainly a series of problems of interference between systems, which requires coverage of wireless network planning considering the goals, capacity targets, quality targets, cost targets, and many other factors, the comprehensive consideration of GSM wireless network status.This article first TD-SCDMA system, the basic principles and wireless network planning theory were described.On this basis, for the H market, TD-SCDMA system proposed wireless network planning and design.H City is a small tourist city, territorial-level city, has been included in TD-SCDMA third-phase project planning.This city's natural resources under conditions of H is the scale of network conditions and network planning, making full use of existing network resources, conditions, based on coverage objectives and service requirements, then, combined with network planning theory, the main city on the formation of H TD- pre-SCDMA network planning.Furthermore, on the TD-SCDMA and GSM / DCS base station to share the feasibility and methods of analysis and research, presented H market TD-SCDMA and GSM base station to share the project design.The main contents are as follows:Chapter I, Introduction. This chapter briefly reviews the development of TD-SCDMA standard process described TD-SCDMA network construction in the developing situation in China, pointed out the significance of this research topic, and then introduced the main contents and organization of papers.Chapter II, TD-SCDMA's basic principles. This chapter of the TD-SCDMA system, the network structure, technology and key technology are briefly introduced.Chapter III, TD-SCDMA wireless network planning theory. This chapter briefly analyzes the TD-SCDMA network planning system and the GSM system, the difference between TD-SCDMA network described the guiding planning principles, objectives and procedures, outlined the link budget and capacity estimation part of the theory.Chapter IV, H Urban TD-SCDMA radio network planning program. H of this chapter to the main urban city as an example, the use of planning theory to the region of the business forecast, estimate the link budget and capacity to complete the TD-SCDMA network size estimation, the formation of the early stages of planning pre-planning.Chapter V, H market TD-SCDMA and GSM / DCS base station to share the design. This chapter is shared between the two systems described the feasibility and methods of the base station resources. And to H base station as an example of a city is proposed to share the exploration base station design process and engineering design, gives the design drawings.Chapter VI, concluding remarks. This chapter summarizes the work on the text, and the prospect of future work.In this paper, the main target of H to study the city, the main city on the H city built a reasonable and reliable network of TD-SCDMA system is proposed H market TD-SCDMA and GSM base station to share designs, and to a base station H City as an example, The survey is given to share base station design process and engineering design for future large-scale construction of 3G networks provide a reference.