Once the nodes in the network are discovered to its neighbor or other nodes in the network as protocol suggested. As an initial and first step of network formation network will constructs topology by the node discovering in the network. Topology control consists of two operations one Topology construction and Topology Maintenance. For the well understanding we would like to define the term Topology control. At the same time make it as an energy draining process will decrease the life time of the network.

Topology maintenance indirectly extends the connectivity life time of the network. Making this process as energy efficient is the quite challenging and essential work. Main aim of the topology maintenance is to identify the broken links and new nodes in the network. But there is very less efficient work in the topology maintenance of PLGPa.ĭesigning the energy efficient topology maintenance for PLGPa is quite difficult due to its organization in topology discovery. This protocol PLGPa incorporates all the three mechanism- prevention, detection/recovery and resilience for the secure routing and communication primitives. A resilience mechanism maintains the certain level of availability even in the adversarial environment. This detection and recovery mechanism are very helpful in the situation when the attacks are unknown. If any malicious activity is identified in the monitoring process by detection mechanism, will call the recovery mechanism for the elimination of malicious node which performs the malicious action in the network. Detection/recovery approach is performed by monitoring the behaviors of the node involved in the network operations and other communication. Prevention mechanisms are highly effectiveĪpproach to find the well known attacks in the network. Malicious action in the network is restricted by the cryptographic techniques in the prevention mechanism. Prevention mechanism restricts the attacks in the network. Prevention mechanism is well suits to the known attacks. Generally three mechanisms to design secure routing protocol are: prevention, detection/recovery, resilience. Especially this PLGPa is designed to perform reliable data transfer between two nodes even in the active adversaries. As these networks are limited resources its very important to be an energy efficient operation. Hidden perceptions of all the protocols are Reliable data transfer and energy efficient routing. Very important and primary challenge is efficient in routing the packet and secure routing against the attack. Due to this a routing protocol design has various challenges. So all the node in the network will perform its primary function and act as routers to route the packet. The nodes between the source and sink will involve in the communication to transfer the packet to the sink. In the adhoc, packet transmission between the source and sink is a cooperative process. In the any communication, sender is the primary node sends the packet and receiver alias sink is the one who receives the packet.

Due to this factor adhoc wireless sensor network relay on the cooperative routing process. They are infrastructure less, self organizing networks for their operations. KeywordsTopology Maintanance, Adaptive Hello messages, PLGPa, PLGPa-AH, Energy EfficientĪdhoc wireless sensor network are limited with the resources like power, CPU Speed, Memory and Network Bandwidth. The modification in the discovery phase can make the topology maintenance efficient in PLGPa. So, we proposed an adaptive hello messages which keeps the period of broadcasting hello message is depend on average event interval time.

But periodically sending hello messages to the nodes not in use or long term idle neighbor nodes are the energy draining and at the same time periodically sending hello message to the frequently communicating nodes are important. In the most of the protocol link maintenance or topology maintenance are handled through periodic hello messages. PLGPa is a secure protocol to resist the various active adversaries within the network but less efficient in topology maintenance. Active adversary within the network degrades the performance of the network by means of resource depletion disturb routing, reliability of data transfer, wastage of CPU time and bandwidth consumption. They are vulnerable to the many active adversaries due to its open and hostile environment. Adhoc wireless sensor networks are limited resource constrained network. Energy Efficient Topology Maintenance using Adaptive Hello Messages in PLGPaĭepartment of Computer Science and Engineering, University College of Engineering (BIT Campus), Anna University Chennai,

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