RECEIVER BASED TIME SYNCHRONIZATION FOR MULTI HOP WIRELESS NETWORKS

... Engineering Thesis Title : Receiver- based Time Synchronization for Multi- Hop Wireless Networks Abstract Time synchronization is a critical piece of software infrastructure in Wireless Sensor Network ... node To achieve this, a time- sync frame is used for our time synchronization Energy Harvesting Time Synchronization (EH-TS) is a receiver- based time...

Ngày tải lên: 02/10/2015, 17:14

... [2] an equal transmit power allocation scheme is used as the channel state information (CSI) is not available at the transmitter If the average attenuation of the channel for each cooperative ... data as an individual antenna with transmission power Pout jt in the MIMO antenna array In the cooperative MIMO scheme, the transmission delay and channel estimation scheme proposed in...

Ngày tải lên: 22/06/2014, 22:20

... this article as: Parvin and Fujii: Hidden node aware routing method using high-sensitive sensing device for multi-hop wireless mesh network EURASIP Journal on Wireless Communications and Networking ... http://jwcn.eurasipjournals.com/content/2011/1/114 Page of 17 Sensing area for high sensitive sensing device with low sensing level (-92dBm) Hidden node...

Ngày tải lên: 20/06/2014, 22:20

... routing Local state information is maintained at each node and can be assumed to be always available The local state information contains the cost metric of outgoing links, such as queuing delay, ... monitoring transforming it into a wireless multi- hop game model that can account for packet errors, buffer overflows, packet forwarding, packet acknowledgments and routing informati...

Ngày tải lên: 16/09/2015, 12:42

... respectively Then, the cluster-heads and the sink node distribute the schedules to their clustered nodes and the cluster-heads in the network, respectively In the case of the cluster-heads, the schedules ... article as: Choi and Lee: Energy consumption and lifetime analysis in clustered multi-hop wireless sensor networks using the probabili...

Ngày tải lên: 20/06/2014, 22:20

... handoff, which leads to the idea of Zone-based bandwidth management in this article Zone-based bandwidth management scheme Basic idea and notations The motivation of Zone-based bandwidth management ... time of BS bandwidth allocation Intra-zone handoff and inter-zone handoff Moreover, by introduction the idea of zone, two types of handoff between RSs are defi...

Ngày tải lên: 21/06/2014, 03:20

... implement the FFT functionality required for the WirelessHD standard CuFFT provides a set of standard FFT algorithms designed for the GPU A benchmarking program obtained on the NVIDIA CUDA forum was ... it and the new FFT algorithm Method CuFFT original CuFFT with all enhancements New FFT algorithm New FFT algorithm with improvement New FFT algorithm with improvement (2-GPU)...

Ngày tải lên: 21/06/2014, 17:20

... F Akyildiz and X Wang, A survey on wireless mesh networks,” IEEE Communications Magazine, vol 43, no 9, pp 22–30, 2005 [3] A Adya, P Bahl, J Padhye, A Wolman, and L Zhou, A multiradio unification ... placed in a 500 m × 500 m area (Figure 7) The simulation parameters are the same as the uniform topology The throughputs are almost similar in these routing protocols at low traffic lo...

Ngày tải lên: 21/06/2014, 23:20

... Caines, C D Charalambous, and R P Malham´ , Power control in wireless systems: a stochastic control e formulation,” in Proceedings of the American Control Conference, vol 2, pp 750–755, Arlington, ... “Constrained power control, ” Wireless Personal Communications, vol 1, no 4, pp 257–270, 1995 N Bambos and S Kandukuri, Power- controlled multiple access schemes for next-gener...

Ngày tải lên: 22/06/2014, 23:20

... Efficient Traffic Diversion and Load-balancing in Multi-hop Wireless Mesh Networks A Dissertation submitted to the Division of Research and Advanced Studies of the University of Cincinnati In ... Jun and Sichitiu in [25] suggest maintaining a separate queue for each individual source at the intermediate relaying nodes However, maintaining separate queues for indivi...

Ngày tải lên: 30/10/2014, 20:08

... display the same time at any given moment by performing rate and offset synchronization; or we could transform timescales by transforming local times of one node into local times of another node ... continuous time synchronization and local on-demand time transformation for BTnodes These two time synchronization approaches address separately the problems described in 1.3 T...

Ngày tải lên: 14/04/2015, 13:23

... Abstract Dynamic Resource Allocation for Energy- Constrained Wireless Networks over Time- Varying Channels by Zhang Xiaolu in Department of Electrical ... is on the establishment of a theoretical framework on dynamic resource allocation for energy- constrained wireless networks over time- varying channels This framework chooses the end-user applicat...

Ngày tải lên: 10/09/2015, 15:52

... Evaluation of Secure Time Synchronization Approaches We first derive the requirements for a secure time synchronization service for WSNs Secondly, we classify and evaluate existing secure time synchronization ... that the synchronization of nodes will remain precise between two successive resynchronizations We propose a secure, accurate, precise, and energyefficient time s...

Ngày tải lên: 21/06/2014, 05:20

... and time-demanding for dense local area network deployments Moreover, as we show here, fixed frequency reuse may result in suboptimal system performance By letting the devices locally coordinate ... problem, where the system performance would benefit from allowing more spatial reuse of radio resources in order to obtain higher areal spectral efficiency To this end, interference-aware MA...

Ngày tải lên: 21/06/2014, 05:20

... distributions for the desired link and interfering link, such as the Rayleigh for the channel envelope of the desired link, and Rician for the interfering link, or vice versa Using (3) and (5), the SIR ... important in studying the performance of selforganizing self-configuring networks For the interference scenario described in the system model, the path loss for the desired path...

Ngày tải lên: 21/06/2014, 22:20