Abstract
Multiple access interferences are the major limiting factors for the performance of
multihop WiMAX based Mesh Network (WMN). The routing algorithms play an
important role in reducing such interferences among the nodes of the WMN. In this paper
a new Routing Tree Construction Algorithm (RTCA) which is based on Balancing the data
and Parallelizing the routes of the data from nodes to BS is proposed and called Balanced-
Paralleled RTCA (Bala-Para-RTCA). This algorithm has a new Down-Node Group
Testing (DNGT) feature. This feature increases the conversion of primary into secondary
interferences which (in conjunction with directivity) can be avoided significantly by the
Modified Fair Relay Centralized Scheduling (MFRCS) algorithm, as a result concurrent
transmissions over a certain slot will be increased. So system performance is enhanced in
terms of scheduling length, links concurrency ratio (LCR) and average transmission delay
(ATD). Without directivity and relative to the standard Breadth First Tree (BFT) RTCA,
the simulation results of the proposed RTCA show concurrency ratio enhancement of
15.38% and 19.4% without and with DNGT respectively
