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In this paper, we exploit the geographic opportunistic routing (GOR) for QoS provisioning with both end-to-end reliability and delay constraints in wireless sensor networks (WSNs). Recent work exploits multipath routing to guarantee both reliability and delay QoS constraints in WSNs. However, the multipath routing approach suffers from a significant energy cost. We also find that existing GOR protocol...
As the rapid development of Internet technology and the deployment of Internet multimedia applications, it's urgent to solve the QoS problems of the real-time multimedia services in the network for clients. This paper proposes a real-time video stream key frame identification algorithm for QoS, named RVKI. In this algorithm, the frame type of IP packets could be identified at the real-time multimedia...
With the rapid development of network technology and network services, the users' requirements of network QoS are also improved. The traditional Active Queue Management(AQM) mechanisms are not adequate to provide QoS guarantee to multimedia video traffics effectively. To provide better quality of service to the multimedia applications in Mobile Ad Hoc Network(MANETs), whose resource is limited and...
With the increasing demand for realtime multicast service in mobile wireless sensor networks (mWSN), it is needed to provide new rendezvous point (RP) selection schemes for mWSN. Due to the arbitrary node mobility in mWSN, where mobile nodes usually go beyond someone RPpsilas coverage, multicast algorithm requires not only end-to-end constrained latency, but also short RP-switch time and low routing...
In wireless sensor networks (WSNs), QoS topology control achieves energy-efficiency by turning off redundant nodes and links, while still satisfying the given QoS requirement. However, existing topology control algorithms assume that links are either connected or disconnected. Recent experiments have shown that, besides the connected and disconnected region, a large percentage of links reside in the...
High speed downlink packet access (HSDPA) was introduced in WCDMA as an enhance technology. The objective of the major component fast packet scheduling is to ensure the fairness between users according to their instantaneous channel state. We proposed in this paper a novel packet scheduling algorithm for HSDPA which is based on QoS assurances. This algorithm is called classified wireless fair queuing...
In this paper, a novel performance analytical model, which uses discrete Markov and M/M/1/K theory, is presented for IEEE 802.11 based wireless networks with finite load. Delay and loss caused by MAC contention and buffer queuing are studied in detail. This model and analysis give an in-depth insight and understanding to the unfairness between uplink and downlink flows that are forwarded by access...
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