Design of IEEE 802.16-based multi-hop wireless backhaul networks (original) (raw)

Cost-Efficient Wireless Mobile Backhaul Topologies: An Analytical Study

2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010

Wireless communication technologies such as microwave radios are used to provide high-speed mobile backhaul connectivity for radio access networks in cases in which wirebased alternatives, e.g. cable or fiber, are not readily available and cannot be deployed in an economic or timely manner. Current mobile backhauls are predominantly deployed in tree or ring topologies, which simplify traffic management. Yet, with the increasing demand on backhaul capacity and the immense cost pressure on mobile backhaul solutions, meshed wireless mobile backhauls have been identified as a promising evolution. While traffic management in wireless mesh networks have been studied extensively in the literature, so far there is no quantitative analysis comparing the different topology options, i.e. mesh, ring and tree, regarding network performance and deployment cost. This paper fills this gap by studying the minimum cost problem of connecting a set of base station/gateway sites using different topologies while supporting both time-and space-varying traffic demands. Furthermore, we consider the additional constraint of resilience to single link failures. The evaluation results show that meshed wireless backhaul topologies are a cost-effective alternative to trees and rings, in particular in the face of spatial and temporal fluctuation of traffic demand and protection against link failures.

Throughput-range tradeoff of wireless mesh backhaul networks

IEEE Journal on Selected Areas in Communications, 2000

Wireless backhaul communication is expected to play a significant role in providing the necessary backhaul resources for future high-rate wireless networks. Mesh networking, in which information is routed from source to destination over multiple wireless links, has potential advantages over traditional single-hop networking, especially for backhaul communication. We develop a linear programming framework for determining optimum routing and scheduling of flows that maximizes throughput in a wireless mesh network and accounts for the effect of interference and variable-rate transmission. We then apply this framework to examine the throughput and range capabilities for providing wireless backhaul to a hexagonal grid of base stations, for both single-hop and multihop transmissions for various network scenarios. We then discuss the application of mesh networking for load balancing of wired backhaul traffic under unequal access traffic conditions. Numerical results show a significant benefit for mesh networking under unbalanced loading. . His research interests include stochastic models, wireless system simulations, and connectivity issues in ad hoc wireless networks.

Meliorate QOS of WIFI-WIMAXin Backhaul Networks

Wireless access networks are developing at a very rapid rate. They are convenient in providing Internet access in remote inaccessible areas thatconfront for traditional wire-line service providers. Wireless communication provideslesser cost, wider support for massive users and conveniently accessible fordifferent users but on the other hand these are considered less efficient and irregular as compared to the wired networks that make end-to-end quality of service (QOS) provision a challenge for wireless networks.Wireless access networks are widely accepted and continuously advancing by expanding their coverage, bandwidth and QOS services. Commonly used wireless standards are IEEE 802.11 (Wi-Fi) and IEEE 802.16 (WiMAX). IEEE 802.11 (Wi-Fi) is a standard that provides high speed WLAN connectivity such as in buildings, homes, hotels, cafes and airports. Wi-Fi networks are possibly the most widely used and accepted technology by providing the highest transmission rate among standard wireless networking.IEEE 802.16 (WiMAX) is a standard to provide high speed transmission in both indoor and outdoor environments.Moreover, it is innovative and commercially viable alternative in last mile implementations to cable modems, DSL technologies and T1/E1 cables. This paper provides detailed technical differences between the 802.11 and 802.16 and also discusses the QOS Service classes of WiMAX network. The simulation consequenceshave been beholding with network simulator allinone-3 and investigating the performances of the overall network.

High-speed backhaul networks: Myth or reality?

Computer Communications, 2008

Wireless technology promises a realization of the long-standing vision of ubiquitous high-speed Internet access. WiFi-based wireless mesh networks that provide user access and wireless data transport over a multi-hop backhaul network are a promising incarnation of the above vision. However, while WiFi is successfully used to provide user connectivity via access points, we note that currently deployed wireless mesh networks show a dismal performance and lack mechanisms in the backhaul to provide an efficient and fair data transport over multiple hops. To assess the capabilities and the limitations of wireless backhaul networks, we are currently building MagNets, a next-generation wireless mesh network in the city of Berlin. Using MagNets, this paper provides insight on how to plan and design efficient wireless backhaul networks by describing the work breakdown and the lessons learned from the design and deployment process. Then, we perform a comprehensive performance evaluation to investigate the impact of a wide range of parameters to shed light on the potential and limitations of wireless backhaul networks.

Design of 802.16 WIMAX Based Radio Access Network

2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006

In this paper, we present the design of the WiMAX based radio access network to provide data coverage to 802.l6 enabled devices. The design provides a multihop solution to provide wide area coverage to users and targets maximizing the radio resource utilization. We propose efficient route construction, data scheduling for increasing the utilization of the backhaul network and base station selection algorithm for end users for efficient load balancing. Through extensive solution, we should attain the benefits by each of the proposed design methods.

On The Design of Resilient and Reliable Wireless Backhaul Networks

2022

The exponential growth of traffic in mobile networks is leading to an increased pressure on the infrastructure of mobile networks and in particular on their backhaul networks. It is more critical than ever to carefully plan backhaul networks. In this paper, we formulate and solve the problem of hierarchical wireless backhaul network design. In our problem, we cover different requirements, namely: topology simplicity, network resiliency and link reliability. We formulate the problem as an Integer Linear Programming (ILP) problem, allowing us to solve the problem to optimality. Furthermore, we provide a graph theory based algorithm that allows to solve the problem overlarge scale. The proposed algorithm exploits the properties of the graph representing the network. The results of our evaluations in various network scenarios demonstrate the efficiency of our ILP formulation and the provided algorithm in keeping the backhaul network simple, resilient and reliable. Using a practical chan...

On The Design of Cost-efficient and Resilient Hierarchical Backhaul Networks

One of the most crucial aspects is modern commercial and tactical wireless networks is the capability of the network’s backhaul to forward that massive amount of traffic to the core network. Hence, the careful planning for a resilient and cost-efficient backhaul is compulsory. In this letter, we formulate and solve the problem of hierarchical wireless backhaul design. In our problem, we cover different requirements, namely: link reliability, network resiliency, and low management overhead. We have formulated the problem as Integer Linear optimization Problem (ILP). The results of our simulation in various network scenarios demonstrate the efficiency of our formulation in keeping the backhaul network simple, reliable and resilient. Using practical channel propagation model and nodes density that model wide range of cities, our results show that even with high resiliency requirements, the network traffic can be backhauled with only 5-10% of the nodes for the considered densities.

Integrated Access Backhauled Networks

IEEE VTC, 2019

5G is finally here. Initial deployments are already operational in several major cities and first 5G-capable devices are being released. Though it is not limited only to millimeter wave deployments, the main promise of 5G lies in the utilization of the high bandwidth available at high frequencies. However, high-frequency deployments are coverage-limited and require denser placement of base stations, which can increase the cost significantly. One of the main contributing factors to the cost is fiber deployment. Integrated access backhauling (IAB), where part of the wireless spectrum is used for the backhaul connection of base stations instead of fiber, is an attractive solution that could make dense deployments economically viable. With this main objective, 3GPP is in the process of standardizing multi-hop IAB networks. This paper provides an overview of the main features of the multi-hop IAB 3GPP rel-16 standard and the rationale behind the design choices.

Development of A New Efficient Routing Scheme for WiMAX Mesh Networks

International Journal of Modern Education and Computer Science, 2013

The emerging WiMAX (Worldwide Interoperability for Microwave Access) technology (IEEE 802.16) can offer low-cost, high speed and longrange communications. The WiMAX supports a point-tomultipoint (PMP) topology and a mesh topology. A WiMAX network is composed of a Base Station (BS) and multiple Subscriber Station (SS). A BS is the mother node and the SS is the child node, though a SS can also be a mother node of a SS if the child node is connected with him to reach to the BS. The BS serves as a gateway connecting to external networks such as the Internet. Number of nodes situated beside a node is called neighbor nodes. In PMP architecture, there is a multi-hop mesh that can be used to gain the high speed wide area network. Again in mesh topology, it increases the wireless coverage and reconfigures ability. In this mode performance depends on a good routing and scheduling protocol. Routing is the way by which a SS will connect with the BS. A good and efficient routing algorithm along with a scheduling algorithm can improve the total network performance significantly. Scheduling algorithm gives the time slot to all SS in a way so that a SS can transmit data or signal in that time slot. There are many research scopes on IEEE 802.16 mesh network especially in routing and scheduling protocol. The purpose of our thesis work is to propose a new routing algorithm to maximize the performance of the network.

Design and capacity performance analysis of wireless mesh network

2008

From the network operator's point of view, the high CAPEX/OPEX cost resulting from fixed/wired backhaul links can be inhibitive to successful deployment of broadband wireless services. The emerging wireless mesh network (WMN) technology is seen as one of the potential solutions which may reduce wired backhaul dependency through multihop transmission. Despite the advantages, many remain sceptical on WMN's network capacity and scalability performances particularly when the user density is high. This paper provides an insight on the best possible upper-bound capacity performance of WMN, taking into consideration three key design parameters namely 1) Percentage of wired backhaul points per network, 2) Mesh-to-Access Link-Rate Ratio (R) and 3) Number of radio interfaces per mesh node including hybrid radio options. These design options are compared and contrasted with different deployment densities. The results generally show that the higher the number of backhaul points, the higher the effective access capacity available to mesh node and hence user domain. Increasing the R and the number of radio per mesh node are two alternative means to push up the effective access capacity per mesh node without increasing the number of wired backhaul points. This is most significant in multi radio system where about 80% of the backhaul points can be eliminated with R= 3 in order to maintain effective access capacity close to full rate (Capacity, C=1) per mesh node. It is also found that 50% of the backhaul points can be eliminated with R=2 for all radio options (except for the pure single radio case).