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QOS BASED ROUTING PROTOCOLS-A REVIEW

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Abstract

Mobile Adhoc NETwork (MANET) has no central control so communication in this is without any centralized control. Devices are independent to move in any direction. QoS is one of the most rapid growing field as well as a challenging task in MANET due to its dynamic nature. In MANET QoS has become a necessity for providing effective routing techniques. The function of QoS is to satisfy QoS constraints and find the routes from source to destination. There are many parameters in Quality of Services. The importance of QoS is that it helps in implementation of real time applications. Many researches and developments in MANET have been made over past few years and different protocols have been developed with different features. In this paper we have concentrated on QoS models, issues in achieving QoS and comparison of various routing protocols based on QoS and these protocols are defined according to QoS parameters.

Figures (2)
Quality of Service is a service which is fulfilled in transporting the packets from source to destination. It plays an Quality or service 1s a service whicn 1s rulluled in transporting the packets trom source to aestination. it plays ar mportant role in Adhoc networks as it provides the services to the user and applications. QoS mechanism supports at ffective routing. Basically it helps in providing the promised services to the user or applications as network has ability tc 1ake this service in terms of end-to-end performance. QoS is hard in MANET due to its dynamic nature, limited batter, fe and limited resource availability. There are two approaches for QoS provisioning soft QoS and hard QoS approach V hen the requirements of QoS are not assured for complete session they are soft QoS. When the requirements of QoS are ssured for complete session they are hard QoS [4]. Mostly soft QoS approach is used in the protocols. QoS parameters car e concave or additive where bandwidth is considered as concave and delay jitter as additive.
Quality of Service is a service which is fulfilled in transporting the packets from source to destination. It plays an Quality or service 1s a service whicn 1s rulluled in transporting the packets trom source to aestination. it plays ar mportant role in Adhoc networks as it provides the services to the user and applications. QoS mechanism supports at ffective routing. Basically it helps in providing the promised services to the user or applications as network has ability tc 1ake this service in terms of end-to-end performance. QoS is hard in MANET due to its dynamic nature, limited batter, fe and limited resource availability. There are two approaches for QoS provisioning soft QoS and hard QoS approach V hen the requirements of QoS are not assured for complete session they are soft QoS. When the requirements of QoS are ssured for complete session they are hard QoS [4]. Mostly soft QoS approach is used in the protocols. QoS parameters car e concave or additive where bandwidth is considered as concave and delay jitter as additive.
Table 1: Comparison of Routing Protocols iN Mis paper VOo Models, 1SSues IN acnlevIng VOo ana COMparison Of routing protocois Dasead On QOo were reviewed. The importance of quality is to identify and to secure the resources along with routes. QoS helps in implementing the real time applications. There are many issues in achieving QoS in MANET like node mobility, unpredictable links, and route maintenance and so on. These must be removed to improve the performance. The performance is improved with the help of various protocols that have been developed. On demand routing protocols have been discussed in this paper. We have defined these protocols according to different approaches like QoS parameters, Network Architecture, Mobility, Addressing Route discovery, Density and Route redundancy. These protocols have included only one or two QoS parameters to provide the solution for routing so there must be new protocols that include mathematical formulation and all the other parameters like jitter, throughput, end to end delay and packet loss. mathematical formulation and all the other parameters like jitter, throughput, end to end delay and packet loss.
Table 1: Comparison of Routing Protocols iN Mis paper VOo Models, 1SSues IN acnlevIng VOo ana COMparison Of routing protocois Dasead On QOo were reviewed. The importance of quality is to identify and to secure the resources along with routes. QoS helps in implementing the real time applications. There are many issues in achieving QoS in MANET like node mobility, unpredictable links, and route maintenance and so on. These must be removed to improve the performance. The performance is improved with the help of various protocols that have been developed. On demand routing protocols have been discussed in this paper. We have defined these protocols according to different approaches like QoS parameters, Network Architecture, Mobility, Addressing Route discovery, Density and Route redundancy. These protocols have included only one or two QoS parameters to provide the solution for routing so there must be new protocols that include mathematical formulation and all the other parameters like jitter, throughput, end to end delay and packet loss. mathematical formulation and all the other parameters like jitter, throughput, end to end delay and packet loss.

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