상세정보
학술지
Modeling and analysis of hierarchical cellular networks with general distributions of call and cell residence times
- 저자
- 여건민, Chi-Hyuck Jun
- 발행일
- 200211
- 출처
- IEEE Transactions on Vehicular Technology, v.51 no.6, pp.1361-1374
- ISSN
- 0018-9545
- 출판사
- IEEE
- 협약과제
- 02MR2200, 초고속패킷 무선전송기술연구, 한기철
- 초록
- We present an analytic model for the performance evaluation of hierarchical cellular systems, which can provide multiple routes for calls through overflow from one cell layer to another. Our model allows the case where both the call time and the cell residence time are generally distributed. Based on the characterization of the call time by a hyper-Erlang distribution, the Laplace transform of channel occupancy time distribution for each call type (new call, handoff call, and overflow call) is derived as a function of the Laplace transform of cell residence time. In particular, overflow calls are modeled by using a renewal process. Performance measures are derived based on the product form solution of a loss system with capacity limitation. Numerical results show that the distribution type of call time and/or cell residence time has influence on the performance measure and that the exponential case may underestimate the system performance.
- KSP 제안 키워드
- Analytic model, Call time, Capacity limitation, Cell residence time, Cellular networks, Cellular system, Channel occupancy time, Distribution type, Handoff call, Hyper-Erlang distribution, Laplace Transform