International Journal on Recent and Innovation Trends in Computing and Communication ISSN: 2321-8169 Volume: 1 Issue: 11 820 – 824 _________________________________________________________________________ 820 IJRITCC | November 2013, Available @ http://www.ijritcc.org _________________________________________________________________________ Impact of a Node mobility in two Mobile WiMAX Networks under different speeds Jupinder Singh M.Tech: Department of Information Technology Chandigarh Engineering College, Landran, Punjab, India jupindersingh@gmail.com Sachin Majithia Assistant Professor: Department of Information Technology, Chandigarh Engineering College, Landran, Punjab, India sachinmajithia@gmail.com Abstract — Mobility is important in wireless network because internet connectivity can only be effective if it is available during the movement of node. Several works have been carried out in performance analysis of node mobility in horizontal handover, but none of those is carried out in multiple networks within the same technology, So this paper analysis the performance of mobile nodes during handover in two WIMAX networks and to measure the performance there are number of parameters available like handover latency, end-to-end delay, MOS value, Throughput, Network Delay, etc. and we have used Network Throughput, Network Delay and MOS value which are involved in mobility management procedures Keywords-Mobile Network, WIMAX, Handover, Throughput, Delay, VoIP, OPNET I. INTRODUCTION The IEEE 802.16 technology (WiMAX) is one of the promising telecommunication technology alternative to 3G for providing last-mile connectivity by radio link due to its high speed data rates, low cost of deployment, and large coverage area. The standard specifies the air- interface between a Subscriber Station (SS) and a Base Station (BS). The IEEE 802.16-2004 standard, also known as the IEEE 802.16d, was published in October 2004. This was further developed into the mobile WiMAX standard referred to as the IEEE 802.16e-2005 or the IEEE 802.16e to support mobile users. The IEEE 802.16 can be used not only as DSL replacement for small business customers but also as a mobile internet access technology. [1] Nowadays, one of killer applications for the IEEE 802.16 is Voice over IP (VoIP) service to support bidirectional voice conversation. Since its introduction, VoIP has been gaining more and more. [1] II. RELATED WORK Researchers have done lot of work in the field of WiMAX (IEEE802.16) and Mobile WiMAX (IEEE802.16e). A standard that specifies the air interface of fixed broadband wireless access (BWA) systems supporting multimedia services. The medium access control layer (MAC) supports a primarily point-to-multipoint architecture, with an optional mesh topology. Then enhancements to IEEE Standard 802.16 2004 was introduced in 2006 to support subscriber stations moving at vehicular speed [5] and thereby specified a system for combined fixed and mobile broadband wireless access. An overview of Mobile WiMAX and the performance for the basic minimal configuration based on the WiMAX Forum Release-1 system profiles. III. QOS(QUALITY OF SERVICE)[2] Originally, four different service types were supported in the 802.16 standard: UGS, rtPS, nrtPS and BE. A. The UGS (Unsolicited Grant Service) :It is similar to the CBR (Constant Bit Rate) service in ATM, which generates a fixed size burst periodically. This service can be used to replace T1/E1 wired line or a constant rate service. It also can be used to support real time applications such as VoIP or streaming applications. Even though the UGS is simple, it may not be the best choice for the VoIP in that it can waste bandwidth during the off period of voice calls. B. The rtPS (real-time polling service): It is for a variable bit rate real-time service such as VoIP. Every polling interval, BS polls a mobile and the polled mobile transmits bw-request (bandwidth request) if it has data to transmit. The BS grants the data burst using UL-MAP-IE upon its reception. C. The nrtPS (non-real-time polling service): It is very similar to the rtPS except that it allows contention based polling. D. The BE (Best Effort): This service can be used for applications such as e-mail or FTP, in which there is no strict latency requirement. The allocation mechanism is contention based using the ranging channel. E. ertPS (Extended rtPS) : Another service type called ertPS (Extended rtPS) was introduced to support variable rate real-time services such as VoIP and video streaming. It has an advantage over UGS and rtPS for VoIP applications because it carries lower overhead than UGS and rtPS