Packet Switch and Its Impact on Dynamic Base Station Relocation in Mesh Networks Using Cognitive Radio

2008 ◽  
Vol E91-B (1) ◽  
pp. 102-109 ◽  
Author(s):  
T. UEDA ◽  
K. TAKEUCHI ◽  
S. KANEKO ◽  
S. NOMURA ◽  
K. SUGIYAMA
Keyword(s):  
Cognitive Radio ◽  
Mesh Networks ◽  
Base Station ◽  
Packet Switch

Congestion Avoidance and Delay Minimization in Energy Aware Routing of Dynamic ieee 802.11s WMN

2016 ◽  
Vol 7 (1) ◽  
pp. 85-112 ◽  
Author(s):  
S.P. Shiva Prakash ◽  
T.N. Nagabhushan ◽  
Kirill Krinkin
Keyword(s):  
Mesh Networks ◽  
Cluster Head ◽  
High Energy ◽  
Base Station ◽  
Base Stations ◽  
Cluster Head Selection ◽  
Slot Allocation ◽  
Proposed Model ◽  
Slot Scheduling ◽  
Link Duration

Minimization of delay in collecting the data at any base stations is one of the major concerns in cluster based Wireless Mesh Networks. several researches have proposed algorithms to control congestion considering static nature of a node. Mobility of a node results in high congestion due to frequent link breakages and high energy consumption due to re-establishment of route during routing process. Hence, the authors consider dynamic nodes with single hop inside the static cluster. The proposed model includes four modules namely, Cluster head selection, slot allocation, slot scheduling and data collection process. the cluster head selection is based on the maximum energy, number of links and link duration. Slot allocation is based on the available energy () and the required energy (). Slot scheduling is carried out based on the link duration. Data at the base station will be collected as they are scheduled. Model is tested using Network Simulator-3 (NS3) and results indicate that the proposed model achieves least delay besides reducing the congestion compared to the existing methods.

Heterogeneous Dynamic Priority Scheduling in Time Critical Applications

2012 ◽  
Vol 2 (2) ◽  
pp. 47-54
Author(s):  
Arvind Viswanathan ◽  
Garimella Rama Murthy ◽  
Naveen Chilamkurti
Keyword(s):  
Cognitive Radio ◽  
Cluster Head ◽  
Primary User ◽  
Base Station ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Priority Assignment ◽  
Dynamic Priority ◽  
Time Critical ◽  
Unlicensed Band

In the unlicensed band, the notion of primary user and secondary user (To implement cognitive radio) is not explicit. By dynamic priority assignment the authors propose to implement cognitive radio in the unlicensed band. In time critical events, the data which is most important, has to be given the time slots. Wireless Sensor nodes in the authors’ case are considered to be mobile, and hence make it difficult to prioritize one over another. A node may be out of the reach of the cluster head or base station by the time it is allotted a time slot and hence mobility is a constraint. With the data changing dynamically and factors such as energy and mobility, which are major constraints, assigning priority to the nodes becomes difficult. In this paper, the authors have discussed about how Wireless Sensor Networks are able to allocate priorities to nodes in the unlicensed band with multiple parameters being posed. They have done simulations on NS-2 and have shown the implementation results.

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