상세정보
학술지
Cell Planning in WCDMA Networks for Service Specific Coverage and Load Balancing
- 저자
- 이채영, 신현문
- 발행일
- 201212
- 출처
- Wireless Personal Communications, v.67 no.3, pp.721-739
- ISSN
- 0929-6212
- 출판사
- Springer
- 협약과제
- 12KE1300, 스마트 시대를 선도하기 위한 방송통신 제도개혁 연구, 김성철
- 초록
- Third-generation (3G) Wideband Code Division Multiple Access network is an evolutionary network which supports services from circuit-based voice service to high and low rate packet-based data services. Unlike the voice oriented second-generation service, the 3G network is enhanced to support services with different data rate, different asymmetry, and different coverage.We thus need to investigate the coverage of multiple services and the capacity of a cell in cell planning for the advanced network. Service specific uplink coverage and downlink capacity with load balancing are considered in our cell planning. The problem is formulated as a linear integer programming optimization model. An efficient tabu search heuristic is developed to solve the NP-hard problem. Very promising computational results are demonstrated, where the solution gap from the optimal to the lower bound by CPLEX is within 0.9% in problems to cover all service traffic in the system. It is demonstrated that higher load factor effectively reduces cell sites for multiple service classes. Load balancing among cells is also demonstrated with different coverage ratio. © Springer Science+Business Media, LLC. 2011.
- KSP 제안 키워드
- Cell Planning, Circuit-based, Code division Multiple Access(CDMA), Coverage ratio, Downlink capacity, Load balancing, Low-rate, Lower bound, Multiple access network, NP-Hard problem, Optimization Model