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Communications in highly mobile vehicular networks are challenging and have gained great attention in recent decades. One promising candidate is the IEEE 1609/802.11(p) network standard suite [1][2][3][4][5][6], which is evolved from the commodity 802.11 technology and revised for vehicular environments. Over the non-safety applications in vehicle networks, group communications are expected to enhance...
A voice conversation is predominantly known as a synchronous, delay intolerant form of communication. To complement voice conversations, voice messaging is a form of asynchronous communication used when the called party is unavailable; a delay in message delivery is naturally expected and tolerated. To this extent, a Delay Tolerant Network can be utilized as the underlying data transport mechanism...
In this paper, we propose a new routing protocol for ad hoc wireless networks, which is based on DSR (Dynamic Source Routing) on-demand routing protocol. Congestion is main reason for packet loss in mobile ad hoc networks. If the workload is distributed among the nodes in the system based on the delay of the paths, the average execution time can be minimized and the lifetime of the nodes can be maximized...
As mobile wireless networks increase in popularity and pervasiveness, seamless mobility is an important paradigm for uninterrupted services in ubiquitous network environments. In this paper, we propose a zero packet loss handoff mechanism for real-time streaming services, which is based on the SIP protocol cooperated with mobile agent, multicast, and buffering technique to overcome the affects of...
The increasing ubiquity of mobile embedded systems has been matched by the evolution of a variety of wireless network standards and technologies. The major constraints of wireless embedded systems are limitations of communication bandwidth, processing capabilities, and battery power. Remote wireless embedded systems often act as sensors, which provide data to a certain community. The exchange of data...
A principal factor in sensor network design is energy efficiency. In this work, we propose to extend the lifetime of sensor networks using appropriate choice of sensor node distribution. The key idea of our scheme is to deploy more nodes in areas of extensive energy usage. Using this scheme of sensor node distribution, we use probabilistic angular routing to route data packets from the sensor nodes...
This paper explores the attributes, layering models and objective functions in cross layer designs for mobile ad hoc wireless networks by taking all the statistical characteristics and constraints from the physical (PHY) layer, media access control (MAC) layer and network (NET) layer into consideration. This paper reviews the entire network optimization across all the PHY/MAC/NET layers. At the PHY...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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