An efficient admission control model based on dynamic link scheduling in wireless mesh networks

Abstract

Background: Wireless mesh networks (WMNs) are a very attractive new field of research. They are low cost, easily deployed, and a high-performance solution to last-mile broadband Internet access. In WMNs, admission control (AC) is one of the key traffic management mechanisms that should be deployed to provide quality of service (QoS) support for real-time traffic. Results: In this paper, we introduce a novel admission control model, based on bandwidth and delay parameters, which integrates a dynamic link scheduling scheme. The proposed model is built on two different methods to access the medium: on a contention-based channel access method for control packets and on a dynamic time division multiple access (DTDMA) for data packets. Each time a new flow is admitted in the network, the WMN's link scheduling is modified according to the flows' requirement and network conditions while respecting the signal-to-interference-plus-noise ratio (SINR); this allows establishing collision-free transmissions. Conclusions: Using extensive simulations, we demonstrate that our model achieves high resource utilization by improving throughput, establishing collision-free transmission, as well as respecting requirements of admitted flows in terms of delay and bandwidth.

Optimizing Packet Generation Rate for Multiple Hops WBAN with CSMA/CA Based on IEEE802.15.6

“…Hence, 0.0099 T = second and the maximal number of transmission packets l is 100.9 times per second. According to (14) and successful probability in Figure 5, the optimal packet generation rate is 9.3 packets per second. The number of successfully transmitted packets of all sensors is shown in Figure 6.…”

Teaching and Learning Optimization method for multi- channel wireless mesh networks with MIMO links

“…Various routing, channel assignment, capacity and scheduling algorithms [1][2][3][4][5][6] have been proposed for non-MIMO WMNs, but those conventional algorithms did not consider the effects of multiple antennas and could not leverage the benefits, brought by MIMO in wireless mesh networks. MIMO has been widely studied for single point-to-point link or point-to-multipoint transmission scenarios [1][2][3][4][5][6][7][8][9][10][11][12], where the main focus is on physical and MAC layer. As far as we know, research on multichannel MIMO WMNs is very limited and only few results are available [8,9].…”

“…A Compact mmWave MIMO Antenna for Future Wireless Networks was proposed in [7] the author presented a new admission control scheme based on link scheduling to support real-time traffic in WMNs. We considering both bandwidth and end-to-end delay as two major criteria in the design [6]. In [8] the authors defined a hybrid multi-path routing algorithm for industrial wireless mesh networks for improving reliability and determinacy of data tra [9]nsmission.…”

“…In, Alamouti proposes a transmit diversity scheme that offers similar diversity gains, using multiple antennas at the transmitter [5]. Furthermore, we design a technique with Teaching and Learning Optimization (TLO) algorithm for finding shortest path between the nodes [6,9]. The evaluation results show that the proposed algorithm, the code finds the shortest path from source to destination node using TLO.…”