Channel Assignments in Wireless Networks with Time-Varying Traffic Behaviors

2015 ◽  
Author(s):  
Haitham Abu-Ghazaleh ◽  
Attahiru Sule Alfa
Keyword(s):  
Wireless Networks ◽  
Time Varying

Adaptive Power and Rate Control for Wireless Networks with Time-Varying Uncertainties

2011 ◽  
Author(s):  
Cunwu Han ◽  
Dehui Sun ◽  
Yuntao Shi ◽  
Zhe Dong ◽  
Zhijun Li ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Rate Control ◽  
Time Varying ◽  
Adaptive Power

Network Coding for Multi-Hop Wireless Networks

2010 ◽  
pp. 187-205
Author(s):  
Meng Yu ◽  
Jing (Tiffany) Li ◽  
Haidong Wang
Keyword(s):  
Wireless Networks ◽  
Network Coding ◽  
Mobile Networks ◽  
Ad Hoc ◽  
Graph Matching ◽  
Hybrid Network ◽  
Time Varying ◽  
General Network ◽  
Coded Cooperation ◽  
Random Codes

We consider practical network coding, a useful generalization of routing, in multi-hop multicast wireless networks. The model of interest comprises a set of nodes transmitting data wirelessly to a set of destinations across an arbitrary, unreliable, and possibly time-varying network. This model is general and subsumes peer-to-peer, ad-hoc, sensory, and mobile networks. It is first shown that, in the singlehop case, the idea of adaptively matching code-on-graph with network-on-graph, first developed in the adaptive-network-coded-cooperation (ANCC) protocol, provides a significant improvement over the conventional strategies. To generalize the idea to the multi-hop context, we propose to transform an arbitrarily connected network to a possibly time-varying “trellis network,” such that routing design for the network becomes equivalent to path discovery in the trellis. Then, exploiting the distributed, real-time graph-matching technique in each stage of the trellis, a general network coding framework is developed. Depending on whether or not the intermediate relays choose to decode network codes, three practical network coding categories, progress network coding, concatenated network coding and hybrid network coding, are investigated. Analysis shows that the proposed framework can be as dissemination-efficient as those with random codes, but only more practical.

scholarly journals On the benefits of Cross Layer Feedback in Multi-hop Wireless Networks

2008 ◽  
Vol 4 (1) ◽  
Author(s):  
Harkirat Singh
Keyword(s):  
Wireless Networks ◽  
Wireless Channel ◽  
Cross Layer ◽  
Time Varying ◽  
Satisfaction Level ◽  
Channel Conditions ◽  
Time Varying Channel ◽  
Selective Information

Wireless networks operate under harsh and time-varying channel conditions. In wireless networks the time varying channel conditions lead to variable SINR and high BER. The wireless channel is distinct from and more unpredictable than the far more reliable wireline channel. {\em Cross layer feedback} is a mechanism where layers provide {\em selective} information to other layers to boost the performance of wireless networks. {\em Cross layer feedback} can lead to a tremendous increase in the performance of the TCP/IP stack in wireless networks, and an increase in the user's satisfaction level. However, it is possible that naive feedbacks (or optimizations) can work non-coherently; therefore, these can negatively effect the performance of the TCP/IP stack. In this paper, we holistically analyze each layer of the TCP/IP stack, and propose possible Cross layer feedbacks which work coherently. The proposed Cross layer feedbacks can greatly enhance the performance of the TCP/IP stack in wireless networks.

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