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  Evaluation of Dual Soft Handoff in a Seamless Roaming Environment  
  Authors : Sayem Patni
  Cite as:


In this paper we try to see how dual soft handoff is effective in achieving higher efficiency in terms of dropping probabilities in relation to various distances and speeds along with consideration for different types of roads while selecting a combination of three emerging algorithms for Dual Soft Handoff. Moreover we go deeper into the actual workings of DSH with some results based on these parameters.


Published In : IJCSN Journal Volume 3, Issue 1

Date of Publication : 01 February 2014

Pages : 55 - 65

Figures : 07

Tables : 13

Publication Link : IJCSN-2014/3-1/Evaluation-of-Dual-Soft-Handoff-in-A-Seamless-Roaming-Environment




Mr. Sayem Patni : received his M. E. Degree in Electronics and Telecommunication from Terna College of Engineering, Mumbai University in 2013 and his B. E. Degree in Electronics and Telecommunication from Xavier Institute of Engineering, Mumbai University in 2010. He has worked at Xavier Institute of Engineering as a Lecturer for one year from July 2011 to June 2012 and has been continually working for the CMAT Exams as an IT Administrator. He has passed GRE and TOEFL with a score of 1390 and 106 respectively. He has published and presented 12 papers in International Conferences and Journals. He has attended various STTP programs ranging from Wireless to Microwaves to Software Enrichment. Currently he is working on the development of Dual Soft Handoff and its applications.








Mobile Communication

Wireless Communication

High Speed Wireless Transfer

Dual Soft Handoff

Moments of Handoff

Handoff Algorithms

Handoff Types

The proposed Soft-Dual-Handoff scheme aims at providing high quality data link for the rapid motion nodes. It has high reliability, which is important for applications such as subway control, video or audio transmission. If one link is broken- down, the SDH switch automatically to single network card mode, which can earn time for resuming from failure. The SDH requires only the cooperation of mobile nodes, and AP needn’t any modification. Therefore, AP can adopt standard IEEE 802.11 serial products to save investment. In fast MSs, a handoff occurs frequently in WLANs due to their small coverage area. It implies that the frequency of handoff s will increase especially in WLANs, so a large number of handoff requests must be handled. Therefore, the handoff dropping probability is increasing, and the service quality (e.g., GoS) becomes worse. On the other hand, the CDMA system is large enough to accommodate fast MSs, and lower handoff request rates, thus resulting in lower burden and good service quality. It is safe to assume that either slow or stationary MSs transmit more data and that fast moving stations communicate at lower data rates. Therefore, according to the MS speed, the load balancing handoff between WLAN and CDMA results in good service quality and the avoidance of unnecessary handoff s. Our proposed methods adopt the mobility management concept through the MS speed cost function to minimize the GoS.










[1] John Y. Kim and Gordon L. Stuber, “CDMA Soft Handoff Analysis in the Presence of Power Control Error & Shadowing Correlation”, IEEE Transactions on Wireless Communications, Vol. 1, No. 2, pp. 245-255, April 2002.

[2] Bechir Hamdaoui and Parameswaran Ramanathan, “A Network Layer Soft Handoff Approach for Mobile Wireless IP-Based Systems”, IEEE Journal on Selected Areas in Communications, Vol. 22, No. 4, pp. 630-642, May 2004.

[3] Qian Hong-Yan, Chen Bing & Qin Xiao-Lin, “A Dual-Soft-Handoff Scheme for Fast Seamless Roaming in WLAN”, 2010 Second International Conference on Networks Security, Wireless Communications & Trusted Computing, pp. 97-100, 2010.

[4] John Y. Kim, Gordon L. Stuber, Ian F. Akyildiz & Boo-Young Chan, “Soft Handoff Analysis of Hierarchical CDMA Cellular Systems”, IEEE Transactions on Vehicular Technology, Vol. 54, No. 3, pp. 1122-1134, May 2005.

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