Congestion Aware Load Balancing for Multiradio

Wireless Mesh Network

ABSTRACT

A new kind of wireless multi-hop network architecture called Wireless Mesh Network (WMN) has recently attracted much attention. In this paper, we propose congestion aware multipath routing protocol called EAOMDV-LB for multiradio multiple interface wireless mesh networks (WMN). The protocol calculates multiple paths using proposed airtime congestion aware (ACA) metric and performs load balancing by computing queue utilization of multiple interfaces of a node. Moreover, the effective load balancing technique maintains data transmission on optimal path by diverting traffic all the way through congested area. WMNs have recently gained a lot of popularity due to their rapid deployment, instant communication capabilities and support for many types of application. For these applications, network congestion is the main reason for lower throughput and longer delay. Most of the present routing protocols for WMN’s are not designed to adapt congestion and optimal link quality. The simulation results using ns2 reveal that our proposed load balancing scheme performs better than AOMDV in terms of throughput, end-to end delay with high traffic density.

EXISTING SYSTEM

  • The Exist AOMDV will experience higher delay due to congestion, Therefore data packet takes more time to arrive the destination.
  • The mesh routers enable the integration of WMNs with various existing wireless networks such as cellular, wireless sensor, wireless-fidelity Worldwide interoperability for Microwave Access (WiMAX).
  • The existing airtime link cost measured at a node in a particular link l, RTTl is the round trip time of link l and α is tunable parameter subjected.

PROPOSED SYSTEM

  • Congestion aware route discovery is proposed for Mobile Adhoc network (MANET) where optimal routing path is selected based minimum queue size of the node.
  • In this section, we have proposed Airtime Congestion Aware (ACA) routing metric with efficient load balancing scheme that maintains nodes’ transmission on optimal path and improve the efficiency of wireless mesh network.
  • We also have computed queue utilization of multiple interfaces on each node to avoid highly loaded nodes. We detail the proposed metric and load balancing scheme as follows.

System Architecture

ALGORITHM:

v Load Balancing Algorithm

  • Priority order
  • Traffic Will be reduced
  • Healthy link

v Wireless Mesh Network

  • Each network user also a provider
  • Forward data to next node

MODULE DESCRIPTION

Ø  Load-Balancing

Ø  Multiradio

Ø  Wireless Mesh Network

Load-Balancing:

Interflow packet order is natively preserved besetting slicing threshold to the delay upper bound at .Any two packets in the same flow slice cannot be disordered as they are dispatched to the same switching path where processing is guaranteed; and two packets in the same flow but different flow slices will be in order at departure, as the earlier packet will have depart from before the latter packet arrives. Due to the fewer number of active flow slices, the only additional overhead in, the hash table, can be kept rather small, , and placed on-chip to provide ultrafast access speed. This table size depends only on system line rate and will stay unchanged even if scales to more than thousand external ports, thus guarantees system scalability.

Multiradio:

Through lay-aside Buffer Management module, all packets are virtually queued at the output according to the flow group and the priority class in a hierarchical manner. The output scheduler fetches packets to the output line using information provided by. Packets in the same flow will bevirtually buffered in the same queue and scheduled in discipline. Hence, intraflow packet departure orders holdas their arriving orders at the multiplexer. Central-stage parallel switches adopt an output-queued model. By Theorem, we derive packet delay bound at firststage. We then study delay at second-stage switches. Define native packet delay at stage m of an be delay experienced at stage m on the condition that all the preceding stages immediately send all arrival packets out without delay.

Wireless Mesh Network:

We consider the Multistage Multiplane Clos-networkbased switch by Chao et a . It is constructed of five stages of switchmodules with top-level architecture similar to a external input/output ports. The first and last stages Clos are composed of input demultiplexers and output multiplexers, respectively, having similar internal structures as those in PPS. Stages 2-4 of M2Clos are constructed by parallel switching planes; however, each plane is no longer formed by a basic switch, but by a three-stage Clos Network to support large port count. Inside each Clos Network, the first stage is composed by k identical Input Modules. Each IM is an packet switch, with each output link connected to a Central Module. Thus, there are a total of m identical in second stage of the Close networks.

New Technology

Ajax toolkit

Stored procedures

javascript

Jquery

Css

Telerik

SYSTEM SPECIFICATION

Hardware Requirements:

v  System : Pentium IV 2.4 GHz.

v  Hard Disk : 40 GB.

v  Floppy Drive : 1.44 Mb.

v  Monitor : 14’ Colour Monitor.

v  Mouse : Optical Mouse.

v  Ram : 512 Mb.

Software Requirements:

v  Operating system : Windows 7 Ultimate.

v  Coding Language : ASP.Net with C#

v  Front-End : Visual Studio 2010 Professional.

v  Data Base : SQL Server 2008.