An IEEE 802.16 WiMAX Module for the NS-3 Simulator

ns-3 is a recently released next generation simulator intended as a replacement of the popular ns-2. It enables a highly rich set of features and is expected to become the first choice of the scientific community soon. ns-3 is in its evolution phase and work at different fronts is still ongoing. With the recent emergence of broadband wireless networks, simulation support for such networks, especially IEEE 802.16 WiMAX, is becoming a necessity. In this paper, we propose and discuss in detail the design and implementation of an IEEE 802.16 WiMAX module for ns-3, with the Point-to-Multipoint (PMP) mode and the WirelessMAN-OFDM PHY layer. Our module implements fundamental functions of the convergence sublayer (CS) and the MAC common-part sublayer (CPS), including QoS scheduling services, bandwidth request/grant mechanism, and a simple uplink scheduler. The aim is to provide a standard-compliant and well-designed implementation of the standard

Efficient Resource Management Mechanism for 802.16 Wireless Networks Based on Weighted Fair Queuing

Wireless Networking continues on its path of being one of the most commonly used means of communication. The evolution of this technology has taken place through the design of various protocols. Some common wireless protocols are the WLAN, 802.16 or WiMAX, and the emerging 802.20, which specializes in high speed vehicular networks, taking the concept from 802.16 to higher levels of performance. As with any large network, congestion becomes an important issue. Congestion gains importance as more hosts join a wireless network. In most cases, congestion is caused by the lack of an efficient mechanism to deal with exponential increases in host devices. This can effectively lead to very huge bottlenecks in the network causing slow sluggish performance, which may eventually reduce the speed of the network. With continuous advancement being the trend in this technology, the proposal of an efficient scheme for wireless resource allocation is an important solution to the problem of congestion. The primary area of focus will be the emerging standard for wireless networks, the 802.16 or “WiMAX”. This project, attempts to propose a mechanism for an effective resource management mechanism between subscriber stations and the corresponding base station

WiMAX: Network Entry Phase Optimization for Bandwidth Improvement Solution

Worldwide Interoperability for Microwave access (WiMAX) service providers is concerned about having enough Internet-backbone to support a potentially large number of users. Network entry process directly influences the initial delay that users are experiencing. Therefore, efficiently combine DCD interval, UCD interval and initial ranging interval in network entry process is predicted to influence the network performance, as presented in this paper

Network entry phase optimization for WIMAX network

In the last few years, there has been a large growth in wireless broadband communication including Worldwide Interoperability for Microwave Access (WiMAX) technologies. The network entry process in WiMAX is the first process for Subscriber Station (SS) to join the WiMAX network. It referred to the early procedure performed by SS to register with Base Station (BS) that controls the WiMAX network. Scanning to ranging procedure is part of several steps associated with network entry process. The problem of long channel scanning and collision in ranging process can lead to the delay to the access time for initialization and recovery of service between SS and BS connection. Most of the current approaches are focused on reducing the scanning time and optimizing the ranging process but nearly everyone has ignored the influence of system parameters setting. Through this research, a technique is proposed to be used for IEEE 802.16 WiMAX standard with consideration on WiMAX network entry system parameter settings. The simulation environment has been set up to test different configuration condition in WiMAX environment. The intention is to investigate and make recommendation for necessary configuration for IEEE 802.16 standard. Simulation are done using ns-3 simulator and the findings are presented. Simulation results indicate proposed optimum key parameter value of DCD Interval, UCD Interval and Initial Ranging Interval with effect on QoS parameters that will allow the WiMAX network to operate in a higher level of performance and environments

Study of IEEE802.16e standards to improve QoS throughput and delay analysis of PMP MAC Scheduling algorithms

WiMAX has two modes of operation: Point to Multi Point (PMP) mode and Mesh mode. PMP mode consists of one BS and multiple SS.The Wi-MAX is IEEE 802.16 Wireless network standard which recently used for Broadband Wireless communication. Now days to satisfy the highest demand of broadband wireless access by using various resource of bandwidth is a biggest challenge for Researchers, in this time WiMAX (Worldwide Interoperability for Microwave Access) emerged as a better solution to fulfil that demand. To provide authentic services for voice, data and videos WiMAX define the various QoS parameters at Media Access Control (MAC) layer. WiMAX structure is based on IEEE 802.16 OSI standard and defines the PMP (Point to Multipoint) and Mesh modes for transmission of information. In this study, cross-layer scheduling algorithm for Wimax networks has been proposed