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A wireless sensor network (WSN) consists of a large number of distributed sensors nodes, each of which is capable of performing computational operations, storage and communication capability. Extending network lifetime and energy efficiency are important objectives and challenges in wireless sensor networks. The nodes near the sink are more likely to use up their energy because they have to forward...
In sensor networks communication by broadcast method involves many hazards, especially collision. Several MAC layer protocols have been proposed to resolve the problem of collision namely ARBP, where the best achieved success rate is 90%. We hereby propose a MAC protocol which achieves a greater success rate (Success rate is defined as the percentage of delivered packets at the source reaching the...
In this paper, we propose IAMAC, an interference avoidance MAC protocol to avoid inter-node interference in dense wireless sensor networks. IAMAC interacts with routing protocol via cross-layer information sharing between the MAC and network layer. By providing information from network layer, we enable the MAC protocol to make proper decisions which result in fewer inter-node interference and lower...
A major issue in the ad hoc networks with energy constraints is to find ways that increase their lifetime. The use of multihop radio relaying requires a sufficient number of relaying nodes to maintain network connectivity. Hence, battery power is a precious resource that must be used efficiently in order to avoid early termination of any node. In this paper, a new battery power scheduling policy based...
To support network mobility in wireless network, NEMO BSP is proposed by IETF. Mobility support paradigm is going to move from the MN to Network. PMIPv6 is the latest protocol based on local mobility management and network-based mobility. The mobile node can freely move between PMIPv6 network and mobile network. The previous NEMO protocols based on PMIPv6 cannot support this kind of mobility due to...
This paper, showed an investigation on performance of the large block forward errors correction (FEC) with drop tail (DT) queuing policy. FEC is a technique that uses redundant packet to reconstruct the dropped packet, while Drop Tail is the most popular queue management policies used in network routers. Since the Drop Tail mainly depends on the size of the queue buffer to decide on whether to drop...
Mobile ad hoc network (MANET) consists of a collection of wireless mobile hosts without the required intervention of any existing infrastructure or centralized access point such as base station. The dynamic topology of MANET allows nodes to join and leave the network at any point of time. Wireless MANET is particularly vulnerable due to its fundamental characteristics such as open medium, dynamic...
Fairness in packets scheduling in routers is a fundamental objective for designing a scheduler. The magnificent WFQ, which approximate GPS to a distinctive level of accuracy, attempts to allocate the bandwidth fairly among the flows according to maxmin principle and to source-destination fashion. Nevertheless, referring to Rawls' method for theory of justice, ??rank alternatives to the worst possible...
A mobile ad hoc network (MANET) is a wireless network that does not rely on any fixed infrastructure (i. e., routing facilities, such as wired networks and access points), and whose nodes must coordinate among themselves to determine connectivity and routing. The broadcast can target a portion of the network (e. g. gathering neighborhood information), or the entire network (e. g., discovering routes...
This paper presents a location based store-and-forward packet routing algorithm for wireless body area networks (WBAN) with frequent postural partitioning. A prototype WBAN has been constructed for experimentally characterizing on-body topology disconnections in the presence of ultra short range radio links, unpredictable RF attenuation, and human postural mobility. A location based packet routing...
Multicast services are used in emerging multimedia applications based on Quality of Service (QoS) development of multimedia group application and the construction of multicast routing tree is significant. Upper bound on the delay between sender and receiver is one of the common QoS constraints. Delay-constrained routing protocols are used to find paths subject to the delay constraint while efficiently...
Link state routing mechanisms have shown good convergence behaviour in networks with mobile hosts. Compared to traditional link state mechanisms, which suffer from broadcast storm problems in mobile ad hoc networks (MANETs), pruned link state approaches such as those used in optimized link state routing (OLSR) have shown significant reduction in the control overhead. In this paper, we show that the...
Mobility management in the wireless domain is a challenging issue for the next generation networks. Frequent change of network requires a new IP address to route packets from one host to another. It is done by sending the mobile node (MN) binding update to the Home Agent (HA) when the Care of address (CoA) gets changed. This registration requires large number of location updates, excessive signaling...
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