A Mixed Strategy-Based Mechanism for Multi-Rate Multi-Channel Allocation in Wireless Networks

Abstract

Recently, many multi-channel protocols and architectures have been proposed to exploit the non-overlapping channels, especially in MANETs and Mesh networks. With the development of modulation and encoding technology, the diversity of data transmitting rate could lead an increment of discrepancy between channels. The contribution of this paper is threefold. First, when allocating channels with quality discrepancy, whether the competition on the high-quality channel should be avoided depends on the degree of the discrepancy. A channel competition model is built to quantify the discrepancy. Second, by modeling the channel allocation problem as a game, we found that when the relatively poor-quality channels are good enough to share the other channels burden, a mixed Nash Equilibrium is needed to improve the fairness of allocation mechanism. Third, a mixed strategy-based channel allocation mechanism (MSCA) is proposed to improve the overall performance by introducing randomcity into channel allocation. Simulation results on NS2 show that, by allowing the users to adaptively changing their strategy, MSCA can improve the throughput by 10%-15% and reduce the end-to-end delay by 20%-30%.

Distributed Channel Allocation and Time Slot Optimization for Green Internet of Things

“…We calculate the score under different slotframes with another 25 nodes join the network in slotframe 15th and 25th as shown in Figure 9 . The score of the ACS with the channel ranking is apparently higher than existing works [ 32 , 33 ]. This is because that existing works simply classify the channels into two categories, i.e., good channels and poor channels, and then randomly allocate the good channels to the nodes.…”

“…The convergence property can be observed when the network obtains a collision-free channel allocation. In research [ 32 ], each node’s ACS is randomly oriented without the channel condition ranking. As each channel is identical, the node has the same probability to stay on the current channel or randomly switch to another channel once collision occurs.…”