Bio: Noor Mohammed is an academic researcher from VIT University. The author has contributed to research in topic(s): Handover & WiMAX. The author has an hindex of 1, co-authored 4 publication(s) receiving 1 citation(s).
••01 Nov 2016
TL;DR: Bandwidth based call Admission Control (BAC) algorithm is proposed that focuses on requested size from MS instead of the number of MSs arriving in ASN and reduces the packet loss ratio and improves the throughput over existing New Call Bounding (NCB) algorithm.
Abstract: In the present day wireless communication networks, the main objective is to support different multimedia services with various requirements of Quality of Services and varying bandwidth requirements. The key role in effective resource management of WiMAX network is to enhance the performance of network. Gateway (GW) relocation of Access Service Network (ASN) includes changing the Anchor Point (AP) of Mobile station (MS) from one GW of an ASN to another GW of different ASN which is not affected on Traffic's Link Layer (LL) handover. As per existing standards defined by IEE 802.16, when this GW relocation from one ASN to other ASN to be performed is not specified, but have information about the GW relocation procedures based on different call admission control algorithms. In this paper, Bandwidth based call Admission Control (BAC) algorithm is proposed that focuses on requested size from MS instead of the number of MSs arriving in ASN. Hence referring to the IEEE 802.16e standard which defines the mobility management in WiMAX network, Call admission control using BAC algorithm minimizes the packet loss ratio and improves the throughput over existing New Call Bounding (NCB) algorithm.
••01 Nov 2016
TL;DR: Transmit Antenna Selection (TAS) scheme in MIMO CR network has been proposed for improving the physical layer security compared to SRS and MRS schemes in CR network.
Abstract: One of the methods to solve the problem of spectrum demand is spectrum sharing and can be achieved using Cognitive Radio (CR) network. The problem in CR network is physical layer security. The physical layer security can be improved using relays in the secondary network. There are two types of relay slection schemes which are Single Relay Selection (SRS) and Multiple Relay Selection (MRS) schemes. In SRS and MRS schemes, the coordination between primary and secondary network is lost due to mutual interference which results in imperfect Channel State Information (CSI). In this paper,Transmit Antenna Selection (TAS) scheme in MIMO CR network has been proposed for improving the physical layer security compared to SRS and MRS schemes in CR network. The physical layer security is analyzed through Security Reliability Tradeoff (SRT) in terms of Outage Probability (OP) and Intercept Probability (IP) for SRS, MRS and TAS schemes. Simulation results show that SRT performance of TAS scheme in MIMO CR network is better than SRS and MRS schemes.
••01 Mar 2019
TL;DR: In this paper, a smart sectorization scheme is presented that enables the number of sectors to change in accordance with theNumber of D2D users and hence reduces interference.
Abstract: The cellular systems require the signals to travel through a base station BS that entirely controls the communication taking place between two devices. However, device to device communication reduces the load on a base station and enables two devices in close proximity to communicate directly. This is known as a device centric approach. Sectorization involves replacing an omnidirectional antenna with directional antennas, achieved by having three or six sectors. In this paper, a smart sectorization scheme is presented that enables the number of sectors to change in accordance with the number of D2D users and hence reduces interference.
TL;DR: A QoS-aware load balancing strategy (QALB) for software defined Wi-fi networks (SD-Wi-Fi), as a solution to address the problem of Wi-Fi congestion among the OpenFlow enabled APs (OAPs).
Abstract: High density Wi-Fi networks require load balancing in order to ensure quality of service (QoS) In the traditional Wi-Fi networks, the wireless stations learn the access points (APs) load and make the association decisions themselves leading to uneven load distribution among the APs The new paradigm, software defined networking (SDN), has a centralized architecture, which allows to manage, measure and control high density Wi-Fi networks easily In this paper we propose a QoS-aware load balancing strategy (QALB) for software defined Wi-Fi networks (SD-Wi-Fi), as a solution to address the problem of Wi-Fi congestion among the OpenFlow enabled APs (OAPs) The SDN controller selects a load level up to which the association decisions are made by the OAPs without consulting the controller The wireless stations from an overloaded OAP are handed to an underloaded OAP by considering multi-metrics such as the packet loss rate, received signal strength indicator (RSSI) and throughput An emulation platform and a large-scale-low-cost testbed with the same settings are constructed to evaluate the performance of our load balancing strategy The results show that in comparison to four non-static schemes such as, channel measurement based access selection scheme (CMAS), (DL-SINR) downlink-signal to interference plus noise ratio AP selection scheme (DASA), mean probe delay scheme (MPD) and RSSI scheme, the proposed QALB, optimizes the throughput up to 16%, reduces the average frame delay up to 19%, minimizes the number of re-transmissions by 49%, reduces the number of handoffs by 15%, improves the degree of load balancing by 22% and minimizes the re-association times by 38%, in high density SD-Wi-Fi