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In this paper, we propose a new location aided MANET routing protocol based on GSR, aiming at reducing inaccuracy of link state routing caused by topology changing in high motion conditions. We deploy a link weight assignment method according to the relative position and speed of each pair of nodes, together with a routing protocol named LAGSR, with the purpose of ameliorating routing accuracy, avoiding...
With the increasing popularity and development of e-commerce and information technology, multi-attribute bilateral matching problem has been receiving more and more attention. In this paper, multi-attribute bilateral matching problem is discussed based on the consideration of stable matching. Concepts and definitions of multi-attribute bilateral stable matching are presented firstly, followed by the...
Vehicle routing problem is an important combinatorial optimization problem. It has an important position in logistics optimization and supply chain management theory. Due to traffic flow, traffic incidents and other factors, the travel speed and travel time of road has large time-variability and randomness in real transport network. The study of vehicle routing problem in time-dependent network has...
This paper presents an infrastructure sensor network and an adaptive MAC. The sensor network is intended for low power wireless sensor monitoring network which could tolerate certain amount of packet loss. Trade-off between power consumption and packet loss rate which application could tolerate is made. An adaptive MAC, which will choose Just-Send mechanism or classic pure ALOHA technique according...
Ultra-wideband (UWB) transmitters for through-wall radars operating in sub-GHz frequency may enable better penetrating ability and lower attenuation than devices utilizing signals above 1 GHz frequencies. In this paper, the crucial parameter of sub-GHz unipolar pulse width is investigated by theoretical analysis and experiment. Based on these parameter data, in order to radiate the signal effectively...
This paper presents an adaptive MAC protocol applying to battery powered wireless senor monitoring network, which could tolerate a certain amount of packet loss but require long lifetime. We are interested in the tradeoff between power consumption and a certain amount of packet loss which application could tolerate. The adaptive MAC protocol, which would choose pure Aloha based transmission or CSMA...
Multiple Bluetooth piconets are likely to co-exist in a physical environment, supporting many wireless applications. An independently operating Bluetooth piconet will inevitably encounter mutual interference from collocated piconets, which results in individual piconet and overall scatternet performance degradation. In this paper, the throughput performance of Bluetooth piconet is studied and evaluated...
Frequency Hopping Spread Spectrum (FHSS) is a technique that wireless devices communicate in a way that the transmission frequencies are alternated in a pre-determined ordered hopping pattern known only to the sending and receiving devices. Therefore, it has become one of the key security features in modern wireless networking and has been adopted in many applications, civilian and military, including...
We investigate the efficient scheduling and access controlling mechanism for multiple types of real time service in WDM network. We classify the messages to four types and propose the scheduling mechanism for the periodic real time messages and a periodic real time messages. The method which surplus bandwidth fragments are used to transmit the a periodic messages is novel and increases the rates of...
In the deep space communication under the USB (unified S-band) system, the channel coding is generally used in the telemetry down-link. To get the coding gain, the subcarrier demodulation model needs to work reliably under the low Es/No. In this paper, a new BPSK subcarrier demodulation model of digital signal is introduced. This demodulation model is able to work well when the Eb/N0 is up to 1 dB,...
E-Health applications require communications systems and user interfaces with high technical capabilities to match the demand of emerging technological developments in the medical field. This paper focuses on the analysis of recent satellite-based telemedicine networks, making emphasis in its technical characteristic, e-health applications and services. Gives an overview of the actual trends of the...
IEEE Standard 1596 Scalable Coherent Interface (SCI) a COTS technology, is one of the candidate architectures for a "Unified Network." Its basic topology is a buffer insertion ring. Messages can be transmitted concurrently on the ring, thus can achieve high throughput. But problems exist when using SCI in real-time applications. The difficulty mainly results from its buffer-insertion feature...
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