Decentralized Handoff for Microcellular Mobile Communication System using Fuzzy Logic
Efficient handoff algorithms are a cost-effective way
of enhancing the capacity and QoS of cellular system. The higher
value of hysteresis effectively prevents unnecessary handoffs but
causes undesired cell dragging. This undesired cell dragging causes
interference or could lead to dropped calls in microcellular
environment. The problems are further exacerbated by the corner
effect phenomenon which causes the signal level to drop by 20-30 dB
in 10-20 meters. Thus, in order to maintain reliable communication
in a microcellular system new and better handoff algorithms must be
developed. A fuzzy based handoff algorithm is proposed in this paper
as a solution to this problem. Handoff on the basis of ratio of slopes
of normal signal loss to the actual signal loss is presented. The fuzzy
based solution is supported by comparing its results with the results
obtained in analytical solution.
[1] Nasif Ekiz, Tara Salih, Sibel and Kermal Fidanboylu "An Overview of
Handoff Techniques in Cellular networks" International Journal of
Information Technology Volume 2 number 3, 2005, pp 132-136.
[2] S.H. Wie, J.S. Jang, B.C. Shin, and D.H. Cho, "Handoff Analysis of the
Hierarchical Cellular System," IEEE Trans. Vehicular Technology, vol.
49, pp. 2027-2036, Sept. 2000.
[3] B. Li, C.K. Wu, and A. Fukuda, "Performance Analysis of Flexible
Hierarchical Cellular Systems with a Bandwidth Efficient Handoff
Scheme," IEEE Trans. Vehicular Technology, vol. 50, pp. 971-980,
July 2001.
[4] Y. Kinoshita, T. Itoh, "Performance analysis of a fuzzy handoff
algorithm by an indoor propagation simulator" proc IEEE, Vehicular
Technology Aug. 1993, pp 241-245.
[5] D. Muaoz-Rodiguez, K. Cattermole, "Handoff procedure for defined
radio cells, proc. IEEE, Vehicular Technology 1987, pp 38-44.
[6] George Edwards, Ravi Sankar "Microcellular Handoff using Fuzzy
Techniques" Wireless Networks 4(1998), pp 401-409.
[7] Junyi Li, Ness. B. Shroff, Edvin K. P Chong "Channel Carrying: A
Noval Handoff Scheme for Mobile Cellular Networks" IEEE/ACM
Transactions on Networking, Vol 7, No. 1, Feb. 1999.
[8] J. J. Astrain, J. Villadangos, M. Castilo, J. R. Garitagoitin, F. Farina
"Mobility Management in Cellular Communication Systems Using
Fuzzy Systems" International Federation for Information Processing,
2004, pp 79-91
[9] Jörg Habetha and Bernhard Walke "Fuzzy Rule-Based Mobility and
Load Management for Self-
Organizing Wireless Networks"
International Journal of Wireless Information
Networks, Vol. 9, No. 2, April 2002
[10] M. Sugeno, Y. Kasukawa, "A Fuzzy-based Approach to Qualitative
Modeling," IEEE Transactions on Fuzzy Systems 1(1) February 1993,
pp 7.
[1] Nasif Ekiz, Tara Salih, Sibel and Kermal Fidanboylu "An Overview of
Handoff Techniques in Cellular networks" International Journal of
Information Technology Volume 2 number 3, 2005, pp 132-136.
[2] S.H. Wie, J.S. Jang, B.C. Shin, and D.H. Cho, "Handoff Analysis of the
Hierarchical Cellular System," IEEE Trans. Vehicular Technology, vol.
49, pp. 2027-2036, Sept. 2000.
[3] B. Li, C.K. Wu, and A. Fukuda, "Performance Analysis of Flexible
Hierarchical Cellular Systems with a Bandwidth Efficient Handoff
Scheme," IEEE Trans. Vehicular Technology, vol. 50, pp. 971-980,
July 2001.
[4] Y. Kinoshita, T. Itoh, "Performance analysis of a fuzzy handoff
algorithm by an indoor propagation simulator" proc IEEE, Vehicular
Technology Aug. 1993, pp 241-245.
[5] D. Muaoz-Rodiguez, K. Cattermole, "Handoff procedure for defined
radio cells, proc. IEEE, Vehicular Technology 1987, pp 38-44.
[6] George Edwards, Ravi Sankar "Microcellular Handoff using Fuzzy
Techniques" Wireless Networks 4(1998), pp 401-409.
[7] Junyi Li, Ness. B. Shroff, Edvin K. P Chong "Channel Carrying: A
Noval Handoff Scheme for Mobile Cellular Networks" IEEE/ACM
Transactions on Networking, Vol 7, No. 1, Feb. 1999.
[8] J. J. Astrain, J. Villadangos, M. Castilo, J. R. Garitagoitin, F. Farina
"Mobility Management in Cellular Communication Systems Using
Fuzzy Systems" International Federation for Information Processing,
2004, pp 79-91
[9] Jörg Habetha and Bernhard Walke "Fuzzy Rule-Based Mobility and
Load Management for Self-
Organizing Wireless Networks"
International Journal of Wireless Information
Networks, Vol. 9, No. 2, April 2002
[10] M. Sugeno, Y. Kasukawa, "A Fuzzy-based Approach to Qualitative
Modeling," IEEE Transactions on Fuzzy Systems 1(1) February 1993,
pp 7.
@article{"International Journal of Electrical, Electronic and Communication Sciences:53263", author = "G. M. Mir and N. A. Shah and Moinuddin", title = "Decentralized Handoff for Microcellular Mobile Communication System using Fuzzy Logic", abstract = "Efficient handoff algorithms are a cost-effective way
of enhancing the capacity and QoS of cellular system. The higher
value of hysteresis effectively prevents unnecessary handoffs but
causes undesired cell dragging. This undesired cell dragging causes
interference or could lead to dropped calls in microcellular
environment. The problems are further exacerbated by the corner
effect phenomenon which causes the signal level to drop by 20-30 dB
in 10-20 meters. Thus, in order to maintain reliable communication
in a microcellular system new and better handoff algorithms must be
developed. A fuzzy based handoff algorithm is proposed in this paper
as a solution to this problem. Handoff on the basis of ratio of slopes
of normal signal loss to the actual signal loss is presented. The fuzzy
based solution is supported by comparing its results with the results
obtained in analytical solution.", keywords = "Slope ratio, handoff, corner effect, fuzzy logic.", volume = "3", number = "2", pages = "219-5", }