In order to improve the network spatial reuse and maximize the network throughput, this paper presents a physical conflict model based power allocation and link scheduling algorithm (PPLA). Firstly, PPLA picks availab...
详细信息
In order to improve the network spatial reuse and maximize the network throughput, this paper presents a physical conflict model based power allocation and link scheduling algorithm (PPLA). Firstly, PPLA picks available set of parallel links using hexagon coloring method. With physical conflict model, it further obtains the minimum power vector which corresponds to parallel links set. The experimental results indicate that the algorithm can increase network spatial reuse ratio and improve throughput significantly.
Collaborative filtering techniques are widely used in e-commerce systems. However, the rating data are very sparse, which affects prediction accuracy greatly. A time division based collaborative filtering algorithm is...
详细信息
Research papers are frequently requested in digital library. When users query for documents about a research problem, users usually want all the related documents and the citations with the relations among them, to en...
详细信息
To tackle control channel saturation problems, this paper proposes OMA, an asynchronous duty cycle based multi-channel MAC protocol with opportunistic media access for wireless sensor networks. By adopting opportunist...
详细信息
To handle the triple hidden terminal problems, this paper proposes OCO, an asynchronous multi-channel MAC protocol with opportunistic cooperation for wireless sensor networks. By adopting opportunistic cooperation, OC...
详细信息
Limitations of current multi-channel MAC protocols include requiring of strict time synchronization, existing large number of multi-channel hidden terminals, and lacking single-hop broadcast support and sleep mechanis...
详细信息
ISBN:
(纸本)9781849192392
Limitations of current multi-channel MAC protocols include requiring of strict time synchronization, existing large number of multi-channel hidden terminals, and lacking single-hop broadcast support and sleep mechanism, i.e. duty cycling. This paper proposes an asynchronous duty cycle based multichannel MAC protocol, called DCM, for wireless sensor networks. Instead of requiring time synchronization among nodes, DCM takes advantage of receiver-initiated cross channel handshake mechanism to make a channel reservation for data transmission, and employs receiver adjustment mechanism to tackle the problem of the loss of broadcasting data and to improve broadcast reliability. According to theoretical analysis using Queueing theory, this paper obtains the average number of available channels. The simulation and testbed experimental results show that DCM reduces the number of multi-channel hidden terminals effectively, and achieves significant improvement in network throughput with increasing benefit as traffic loads increase while maintaining higher energy efficiency.
In this paper, a multi-channel MAC protocol, called M&M, with multiple channel reservation is proposed to tackle the channel conflict problem. M&M is fully distributed with no requirements of time synchronizat...
详细信息
In this paper, the concept of multi-radio sensor networks is introduced, and the reliability for multi-radio MAC protocol is researched extensively, via establishing a probability model of reliability. To be specific,...
详细信息
In this paper, a duty cycle based multi-channel MAC protocol with multiple channel reservation, called M-cube, is proposed to tackle the triple hidden terminal problems. M-cube can make nodes to choose one actually id...
详细信息
暂无评论