An adaptive multi-criteria vertical handoff decision algorithm for radio heterogeneous network

2005 ◽  
Author(s):  
Qiang Guo ◽  
Jie Zhu ◽  
Xianghua Xu
Keyword(s):  
Heterogeneous Network ◽  
Vertical Handoff ◽  
Decision Algorithm

A Vertical Handoff Decision Algorithm Based on QoS Evaluation

2014 ◽  
Vol 989-994 ◽  
pp. 1464-1468
Author(s):  
Yang Tao ◽  
Kun Zhou
Keyword(s):  
User Preferences ◽  
Vertical Handoff ◽  
Heterogeneous Wireless Network ◽  
Analytic Hierarchy ◽  
Full Account ◽  
Decision Algorithm ◽  
Target Network ◽  
Simulation Results ◽  
Qos Evaluation ◽  
Hierarchy Process

In the next generation of heterogeneous wireless network environment, to meet the network requirements of diverse services ,we propose a vertical handoff decision algorithm based on QoS evaluation that refine the handover unit to services. The proposed algorithm consider the needs of the services、 network conditions、 user preferences and other factors, and makes Analytic Hierarchy Process (AHP) and cost function combine to choose the target network that is best meet the requirements of services . Comparing with the vertical handoff decision based on RSS, simulation results show that the proposed method can take full account of the different QoS requirements of various services types to choose the appropriate network, and would not cause performance degradation.

scholarly journals The Reversing Paging Process of Callee in Heterogeneous Networks

2011 ◽  
Vol 1 ◽  
pp. 3-8
Author(s):  
Cong Zhao ◽  
Wei Guo
Keyword(s):  
Heterogeneous Networks ◽  
Mobility Management ◽  
Heterogeneous Network ◽  
Vertical Handoff ◽  
The Past ◽  
The Future ◽  
Wireless Signal ◽  
Set Up

To achieve the goal that anybody could communicate with anyone at anytime in anyplace and in anyway, many technologies, such as GSM、CDMA、WCDMA、CDMA2000、TD-SCDMA、802.11a/b/g and so on, come true in the past years. And now, many B3G or 4G technologies are being studied. It is well-known that the future network would be heterogeneous networks. It is studied in this paper the mobility management of wireless heterogeneous network and a reversing paging process of callee is proposed which integrates paging and handoff. In the process when the caller pages the callee choosing its best suited network on one end, the callee chooses its own best network to begin a reversing paging process to set up the communication. The simulation tells that the proposed process has better performances in the call delay, the call succeeding rate and the wireless signal cost than that of the existing process in which it sets up the call first and then does vertical handoff independently.

Application Specific Performance Evaluation of Vertical Handoff in UMTS-WLAN Network

2018 ◽  
Vol 18 (04) ◽  
pp. 1850013 ◽  
Author(s):  
AABHA JAIN ◽  
SANJIV TOKEKAR
Keyword(s):  
Heterogeneous Network ◽  
Mobile Node ◽  
Traffic Load ◽  
Vertical Handoff ◽  
Handoff Management ◽  
Seamless Mobility ◽  
Handoff Latency ◽  
End To End ◽  
Application Specific ◽  
Unnecessary Handoff

The next generation of wireless system is expected to provide multimedia, multi class services any time anywhere with seamless mobility and Quality of Service (QoS). In such environment, vertical handoff management plays an important and challenging role. Some of the main functions of vertical handoff management are: to implement appropriate vertical handoff decision to minimize number of unnecessary handoff, to maintain minimum vertical handoff latency for seamless mobility and to provide guaranteed acceptable QoS required for user satisfaction. Thus, in this paper to avoid unnecessary handoff in integrated heterogeneous network we have proposed that the vertical handoff decision depends on coverage area of the network and the speed of the Mobile Node. Application specific cut-off speed for particular coverage range of network during which handoff is beneficial has been determined. Real time applications like HDTV, MPEG-4, and H.261 are considered in integrated heterogeneous network of UMTS (Universal Mobile Telecommunication System) and WLAN. Vertical handoff latency is analyzed for varied network traffic load, types of application and varied speed of Mobile Node. Effect of Mobile Node speed on packet loss is also analyzed. Finally, to satisfy user with acceptable end to end QoS, especially in the presence of heterogeneous integrated networks where every network has individual QoS, an end to end QoS mapping scheme between UMTS and WLAN integrated network has been proposed. The simulation is performed using Network Simulator NS-2 with NIST (National Institute of Standards and Technology) add on module.

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