The aim of this paper is to propose a Quality of Service model for Dynamic Source Routing
protocol (DSR) by adding extension related to bandwidth metric to its structure to support certain aspect of
QoS capabilities. DSR protocol is a simple and efficient routing protocol designed specifically for use in
multi-hop wireless ad-hoc networks of mobile nodes. It is an on-demand routing protocol that is based on
the concept of source routing and composed of two phases: route discovery and route maintenance. To
achieve this goal, the DSR Route Request control packet is modified by adding a new field that will be
used to determine the acceptance level of available bandwidth. The mobile node must have to allow data
traffics to pass through reaching the destination nodes. In order to test the proposed model, a simulation
model is implemented using the Network Simulator (NS-2.28) and different scenarios were tested to see the
performance of the modified protocol compared with the original DSR protocol. The results show that not
all routes from source to the destination chosen by the DSR routing protocol are suitable for real time
traffic transmissions, since there is no QoS considered in the routing protocol; whereas the DSR with QoS
shows extremely good results, where the transmission delay is not desired. Also, pure DSR protocol
consumes channel and node bandwidth due to large amount of routing packets generated to establishing
routes and both protocols are operation well in low congestion network. Thus, from simulation results and
analysis, it can be seen that adding QoS to routing protocol is meaningful to optimize the performance of
traffic on the network; especially the real time traffic.