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Mobile an ad hoc network is a self organizing wireless network for built spontaneously to connect the mobile devices. It does not require any fixed infrastructure due to no wired backbone. It is suitable to use in environment that have need of on the fly set-up. Every host is a router and packet forwarder. Each node may be mobile, and topology changes frequently and unpredictably due to the arbitrary mobility of mobile nodes. This aspect leads to frequent path failure and route rebuilding. Routing protocol development depends on mobility management, efficient bandwidth and power usage which are critical in ad hoc networks. Cross layer scheme is the new method for wireless mobile devices become to increase the capacity network. In this paper, proposed a new cross layer scheme based algorithm to reduce the link break in MANETs. This present three schemes to reduce packet retransmission ratio by distribution signal information between PHYSICAL LAYER and MAC LAYER, and to discuss the frequent route failures in MANET by identify shortly to be broken links instead of prediction of received signal power, To find optimized route maintenance by taking into consideration of Bandwidth, Delay which results by improvement of QoS. The performance of cross layer process for all the schemes simulation are carried out to evaluate network performance using network simulator NS-2 based on the basic parameters like Throughput, packet delivery ratio(PDR) in term of number of nodes when various pause times.

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Frequent changes in network topology, confined battery capacity of nodes and unreliable nature of wireless channels are the main challenges for reliable routing in Mobile Ad hoc Network (MANET). Selecting a long lasting route is a critical task in MANET. In this paper, we propose a new protocol, Route Stability and Energy Aware Ad hoc On-demand Distance Vector (RSEA-AODV) protocol which is an enhancement of Ad hoc On-demand Distance Vector (AODV) protocol. It designs a bi-objective optimization formulation to compute the reliability factor based on stability and residual energy of nodes. The route with the highest reliability factor value is selected for data transmission. This protocol is compared with other similar routing protocols: PERRA and AODV. We use ns-2 for simulation. Our simulation results show that, the proposed protocol increases the node expiration time by 12 -32 % and accomplishes 7 -13 % higher packet delivery ratio compared to PERRA or AODV. The packet delay and control overhead of the proposed protocol is comparable to that of AODV.