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Shaji, K. S.
- Reducing Connection Disruption Time during WiMAX Handover
Abstract Views :157 |
PDF Views:3
Authors
Affiliations
1 Department of Electronics and Telecommunication Engineering, Sathyabama University, Chennai, IN
2 Rajas International Institute of Technology For Women-RIITW, Nagercoil, IN
1 Department of Electronics and Telecommunication Engineering, Sathyabama University, Chennai, IN
2 Rajas International Institute of Technology For Women-RIITW, Nagercoil, IN
Source
Wireless Communication, Vol 4, No 8 (2012), Pagination: 401-404Abstract
Mobile WiMAX, the enhanced version of the IEEE 802.16 standard with mobility support, defines the implementation of hard handover is mandatory. Being a break before make technique, the HHO concept in MWiMAX suffers from a lengthy “inter-handover” CDT that could lead to unwanted hazards like packet losses, call disruptions or even call drops, while on the move. This occurs in the actual handover phase, when an MS terminates the connection with the SBS and tries to set-up connections with the selected TBS. In MWiMAX, data, voice and multimedia contents are intermixed and each requires different mechanisms for its transmission, particularly during handover. So, such a lengthy CDT may cause serious service disruptions in case of real-time high-speed delay-sensitive voice and streaming multimedia applications in MWiMAX networks. To solve this problem without many changes to 802.16e equipments, we propose an enhanced link-layer QoS aware handover scheme-Passport Handover to accelerate handover process. We also propose a connection CID assignment strategy to avoid confliction of CIDs of handing over services with that of ongoing services in the target BS. Finally we have evaluated the performance using OPNET Modeler.Keywords
WiMAX, Handover, OPNET Modeler.- Co-Channel & Adjacent Channel Interference Blocking Performance in 2.4 GHz Band
Abstract Views :154 |
PDF Views:3
Authors
N. Prabakaran
1,
K. S. Shaji
2
Affiliations
1 Department of Electronics & Telecommunication Engineering, Sathyabama University, Chennai, 600119, Tamilnadu, IN
2 Rajas International Institute of Technology for Women, Nagercoil, IN
1 Department of Electronics & Telecommunication Engineering, Sathyabama University, Chennai, 600119, Tamilnadu, IN
2 Rajas International Institute of Technology for Women, Nagercoil, IN
Source
Wireless Communication, Vol 4, No 8 (2012), Pagination: 405-408Abstract
The emergence of several radio technologies such as Bluetooth, and IEEE 802.11 operating in the 2.4 GHz unlicensed ISM frequency band may lead to signal interference and result in significant performance degradation when devices are co-located in the same environment. In the normal mode of operation of co located Bluetooth piconets, nodes in different piconets transmit independently of each other, and thus in band co-channel interference is certain to occur from time to time. IEEE 802.11 and Bluetooth, these two operating in the unlicensed 2.4 GHz frequency band are becoming more and more popular in the mobile computing world. The number of devices equipped with IEEE 802.11 and Bluetooth is growing drastically. Result is the number of co-located devices, say within 10 meters, grown to a limit, so that it may causes interference issues in the 2.4 GHz radio frequency spectrum. In this paper, we investigate the interference issues of 2.4 GHz frequency band.Keywords
Bluetooth, IEEE 802.11b, Interference, WLAN.- Fuzzy Set Route Maintenance in Set Routing for Mobile Wireless Sensor Networks
Abstract Views :152 |
PDF Views:5
Authors
Affiliations
1 Department of Electronics and Telecommunication Engineering, Sathyabama University, Chennai, Tamil Nadu, IN
2 Rajaas International Institute of technology for Women, Nagercoil, Tamil Nadu, IN
1 Department of Electronics and Telecommunication Engineering, Sathyabama University, Chennai, Tamil Nadu, IN
2 Rajaas International Institute of technology for Women, Nagercoil, Tamil Nadu, IN