Impact of handoff protection strategies on cellular mobile system capacity

In the future cellular mobile systems, the steadily growing mobile subscriber community and their demand for diversity of service place great challenge on the bandwidth utilization, especially in the wireless network part, as radio spectrum is a limited resource. Carefully planned radio usage is critical for both system capacity and service quality. Current research work in literature cares about two aspects of the service provision capability of cellular networks. One is capacity related that emphasizes the user admission capability and the other is service quality related that targets the connection continuity. However, actually achievable user accommodation capability is a cooperative result of both aspects. This paper mathematically reveals the impact of handoff protection, which is introduced to enhance connection robustness, on the capacity of cellular mobile systems. We first extract the basic mobility characteristics from the real world cellular environment to establish an ideal traffic model. Then a Markov approach is proposed to analyze the correlation between the user admission capability and the channel reservation, which is one strategy for handoff protection, and furthermore to answer the question how the user accommodation capability is affected by channel reservation in this ideal model. Simulation outcomes are provided for the creditability verification on the theoretical results. We find that system capacity and service quality are two conflicting objectives and tradeoff is inevitable. Finally, a dynamic channel reservation scheme is described to provide a mechanism for the tradeoff coordination between system revenue and service quality.

[1]  Sajal K. Das,et al.  A dynamic load balancing strategy for channel assignment using selective borrowing in cellular mobile environment , 1996, MobiCom '96.

[2]  D. Lara-Rodriguez,et al.  Fractional channel reservation in mobile communication systems , 1999 .

[3]  O. K. Tonguz,et al.  Handoff ordering using signal prediction priority queuing in personal communication systems , 1999 .

[4]  Ness B. Shroff,et al.  The study of a channel sharing scheme in wireless cellular networks including handoffs , 1999, IEEE INFOCOM '99. Conference on Computer Communications. Proceedings. Eighteenth Annual Joint Conference of the IEEE Computer and Communications Societies. The Future is Now (Cat. No.99CH36320).

[5]  Dong-Wan Tcha,et al.  Prioritized channel assignment in a cellular radio network , 1992, IEEE Trans. Commun..

[6]  Taieb Znati,et al.  A framework for call admission control and QoS support in wireless environments , 1999, IEEE INFOCOM '99. Conference on Computer Communications. Proceedings. Eighteenth Annual Joint Conference of the IEEE Computer and Communications Societies. The Future is Now (Cat. No.99CH36320).

[7]  Ness B. Shroff,et al.  Channel carrying: a novel handoff scheme for mobile cellular networks , 1997, Proceedings of INFOCOM '97.

[8]  Stephen S. Rappaport,et al.  Comments on "Teletraffic model and performance analysis for cellular mobile radio telephone systems with prioritized and nonprioritized handoff procedures" , 1986 .

[9]  Berth Eklundh,et al.  Channel Utilization and Blocking Probability in a Cellular Mobile Telephone System with Directed Retry , 1986, IEEE Trans. Commun..

[10]  Mostafa A. Bassiouni,et al.  Predictive schemes for handoff prioritization in cellular networks based on mobile positioning , 2000, IEEE Journal on Selected Areas in Communications.

[11]  Bijan Jabbari,et al.  A Measurement-Based Prioritization Scheme for Handovers in Mobile Cellular Networks , 1992, IEEE J. Sel. Areas Commun..

[12]  Johan Karlsson,et al.  A cellular mobile telephone system with load sharing-an enhancement of directed retry , 1989, IEEE Trans. Commun..

[13]  M. Gudmundson.  Cell planning in Manhattan environments , 1992, [1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology.

[14]  Biswanath Mukherjee,et al.  Dynamic channel reservation based on mobility in wireless ATM networks , 1999, IEEE Commun. Mag..

[15]  Ming Zhang,et al.  The nonuniform compact pattern allocation algorithm cellular mobile systems , 1991 .

[16]  Prathima Agrawal,et al.  Minimizing cellular handover failures without channel utilization loss , 1994, 1994 IEEE GLOBECOM. Communications: The Global Bridge.

[17]  C. K. Un,et al.  Performance of personal portable radio telephone systems with and without guard channels , 1993, Proceedings of ICC '93 - IEEE International Conference on Communications.

[18]  Andrea Baiocchi,et al.  The geometric dynamic channel allocation as a practical strategy in mobile networks with bursty user mobility , 1995 .

[19]  Stephen S. Rappaport,et al.  Traffic model and performance analysis for cellular mobile radio telephone systems with prioritized and nonprioritized handoff procedures , 1986, IEEE Transactions on Vehicular Technology.

[20]  S. Rappaport,et al.  CBWL: A new channel assignment and sharing method for cellular communication systems , 1993, IEEE 43rd Vehicular Technology Conference.

[21]  Stephen S. Rappaport.  Blocking, hand-off and traffic performance for cellular communication systems with mixed platforms , 1993 .

[22]  Ian F. Akyildiz,et al.  A resource estimation and call admission algorithm for wireless multimedia networks using the shadow cluster concept , 1997, TNET.

[23]  Leonard J. Cimini,et al.  Call blocking performance of distributed algorithms for dynamic channel allocation in microcells , 1994, IEEE Trans. Commun..

[24]  S.P.R. Kumar,et al.  Dynamic channel allocation in interference-limited cellular systems with uneven traffic distribution , 1999 .

[25]  Scott Jordan,et al.  A performance bound on dynamic channel allocation in cellular systems: equal load , 1994 .

[26]  Yi-Bing Lin,et al.  A non-blocking channel assignment strategy for hand-offs , 1994, Proceedings of 1994 3rd IEEE International Conference on Universal Personal Communications.

[27]  Raymond Steele,et al.  Teletraffic performance of microcellular personal communication networks , 1992 .

[28]  Wai-Choong Wong,et al.  Ordered dynamic channel assignment scheme with reassignment in highway microcells , 1992 .

[29]  K. N. Chang.  An efficient borrowing channel assignmnet scheme for cellular mobile systems , 1998 .

[30]  Songwu Lu,et al.  Adaptive resource management algorithms for indoor mobile computing environments , 1996, SIGCOMM 1996.

[31]  Tak-Shing Peter Yum,et al.  Compact pattern based dynamic channel assignment for cellular mobile systems , 1993, Proceedings of GLOBECOM '93. IEEE Global Telecommunications Conference.