IEEE 802.11n: Joint modulation-coding and guard interval adaptation scheme for throughput enhancement

2020 ◽  
Vol 33 (8) ◽  
pp. e4347
Author(s):  
Pravinkumar Patil ◽  
Meenakshi Patil ◽  
Santosh Itraj ◽  
Uttam Bombale
Keyword(s):  
Ieee 802.11N ◽  
Guard Interval ◽  
Throughput Enhancement ◽  
Modulation Coding ◽  
Adaptation Scheme

scholarly journals An Interference-Aware Rate and Channel Adaptation Scheme for Dense IEEE 802.11n Networks

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Tingpei Huang ◽  
Shibao Li ◽  
Xiaoxuan Lu ◽  
Shaoshu Gao
Keyword(s):  
Transmission Rate ◽  
Rate Adaptation ◽  
Coarse Grained ◽  
Adaptation Algorithm ◽  
Current Channel ◽  
Ieee 802.11N ◽  
Fine Grained ◽  
Channel Conditions ◽  
Rapid Deployment ◽  
Adaptation Scheme

Rate adaptation, which dynamically chooses transmission rate provided at the physical layer according to the current channel conditions, is a fundamental resource management issue in IEEE 802.11 networks with the goal of maximizing the network throughput. Traditional rate adaptation algorithms for IEEE 802.11n networks do not consider the interference problem, which becomes much more serious due to the rapid deployment of IEEE 802.11n devices and large number of mobile terminals. In this paper, an interference-aware rate and channel adaptation scheme RaCA for intensive IEEE 802.11n networks was proposed. Firstly, RaCA leverages RSSI and CSI information together to measure the current channel conditions at the receiver side. RSSI is a coarse-grained indicator and CSI is a fine-grained indicator. Secondly, a two-stage rate adaptation scheme TSRA was designed, which can quickly adapt to optimal bit rate based on RSSI and CSI information. Finally, a quorum-based channel adaptation algorithm QCA was proposed, which does not need control channel. If channel suffers severe interferences, RaCA calls QCA to choose another channel to work on. Simulation and testbed implementation results demonstrate that RaCA achieves significant throughput gain over SampleLite and Minstrel-HT.

scholarly journals Adaptive Two-Level Frame Aggregation for Fairness and Efficiency in IEEE 802.11n Wireless LANs

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Minho Kim ◽  
Eun-Chan Park ◽  
Chong-Ho Choi
Keyword(s):  
Scheduling Algorithm ◽  
Local Area ◽  
Wireless Channel ◽  
Network Throughput ◽  
Channel Access ◽  
Frame Size ◽  
Ieee 802.11N ◽  
Frame Aggregation ◽  
Data Rates ◽  
Adaptation Scheme

This paper deals with the problem of performance degradation in wireless local area networks (WLANs) based on IEEE 802.11n. When a wireless channel is shared by heterogeneous stations that have different data rates and packet sizes, each station occupies a different amount of airtime because the basic channel access mechanism of WLAN was originally designed to provide fair chance of channel access, regardless of packet size and data rate. This leads to the degradation of overall network throughput and airtime fairness among stations, which is known as performance anomaly. To resolve this problem, we firstly formulate an optimization problem for a generalized two-level frame aggregation whose objective is to maximize the achievable throughput under the constraint of airtime fairness. Then, we propose a frame size adaptation scheme that controls the number of packets in an aggregated frame. The proposed scheme is fully compatible with the IEEE 802.11 standard and works in a distributed manner, which neither modifies the channel access mechanism nor resorts to a centralized scheduling algorithm. The extensive simulation results confirm that the proposed scheme tightly regulates the airtime usage of each station to be almost the same and significantly improves the overall network throughput compared to other existing schemes.

Throughput Enhancement for SATCOM Systems Using Dynamic Spectrum Controlled Channel Allocation under Variable Propagation Conditions

2017 ◽  
Vol E100.B (2) ◽  
pp. 390-399
Author(s):  
Katsuya NAKAHIRA ◽  
Jun MASHINO ◽  
Jun-ichi ABE ◽  
Daisuke MURAYAMA ◽  
Tadao NAKAGAWA ◽  
...  
Keyword(s):  
Channel Allocation ◽  
Dynamic Spectrum ◽  
Throughput Enhancement

Indicators of wireless technologies for monitoring the quality and management

2017 ◽  
Vol 11 (1) ◽  
pp. 14-24
Author(s):  
Е. М. Abbasov
Keyword(s):  
Wireless Lan ◽  
Sensor Nodes ◽  
Wireless Internet ◽  
Monitoring And Control ◽  
Ieee 802.11N ◽  
Wireless Technologies ◽  
Zigbee Technology ◽  
Transmission Of Information ◽  
And Control ◽  
Transmission Speed

The problems of integration of the various wireless technologies, for-consists in the provision of required transmission speed and the transmission of information over a considerable distance at low power sensor nodes transmitters wireless Internet-water network for remote monitoring. Analyzed the integration of wireless LAN standard IEEE 802.11n/g and Bluetooth. Determined Graphic analytical dependence-dence, the defining characteristics of the data rate for wireless IEEE 802.11n / g networks. It analyzes the main shortcomings of BSS associated with ef cient use of batteries; the basic Metody reduce energy consumption for WSN based on the ZigBee technology, based on the planning schemes of awakening and data collection schemes. The possibilities MeshLogic technology solutions for the monitoring and control tasks that are critical to BPE-autonomous work Meni sensors.

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