Research On Coverage And Capacity Planning Of TD-SCDMA Radio Network

TD-SCDMA is the mobile communication standard of the third generation,which is independent researched and developed by our country who has our own intellectual property rights and name brands , including TDD, Smart Antenna, Joint Detect ,Dynamic Channel Allocation, Power Control , Software Radio,Baton Handover and Power Control,etc ,which has the advantages in technology. January 2009, China Mobile obtain TD-SCDMA licence, which means TD-SCDMA technology has entered into application . At present, 3G network construction is doing throughout China . Good network planning design can shorten the construction period, improve engineering quality and reduce cost . Therefore it has positive significance to achieve the goal, play the construction of network advantage, obtain good economic benefit in TD-SCDMA network planning research .As the mainstream of 3G technology, TD-SCDMA wireless network planning is different from the GSM network planning . Covering planning and capacity planning of GSM network can be separately done . The main consideration of covering planning is wireless route attenuation and capacity planning is frequency planning .TD-SCDMA is different from GSM , for example, TD-SCDMA system is the only system of adopting Time-division duplex which is different from Frequency-division duplex ,and TD-SCDMA can not consider respiratory effects. The TD-SCDMA wireless network will not only satisfy the need of voice communication, but also the requirement of data communication.Coverage and capacity planning can not be done completely separately in TD-SCDMA wireless network planning ,while it should consider the technical features of TD-SCDMA and the application requirements of 3G network . Network planning purposes,generally speaking,it is in support of a variety of multimedia services and QoS to meet certain conditions,have a good network capacity to meet certain requirements of wireless coverage,by adjusting coverage,capacity, links between the balance between providing the best quality of service. This paper attempts to summarize theories and analysis examples to achieve the best possible quality by using the simulation and the study of TD-SCDMA wireless network covering planning and capacity planning method.This paper introduces the history of the development of mobile communications systems at first and states the conception of TD-SCDMA and its history of development and the advantages of technology in brief. Then, it introduces the structure of system, and the key technology of TD-SCDMA. Next, it introduces characters of network planning and the principles of guidance, the main contents, the design process for the network . In the article, the calibrating of wireless communication model, the network planning budget ,the wireless capacity analysis of TD-SCDMA network coverage and capacity planning are introduced with emphasis .And the way of analysis and computing formula are also proposed. In the end,it introduces the simulation of network classification and the simulation conditions of TD-SCDMA network planning. It also provides the result of simulation with some examples and the analysis of coverage ,capacity and quality. This work is an in-depth study on the characteristics of 3G mobile telecommunications technology , based theoretical summary and analysis of the practical examples. And it has a certain significance for the current TD-SCDMA network planning and engineering practice.