scholarly journals An Effective Wide-Bandwidth Channel Access in Next-Generation WLAN-Based V2X Communications

2019 ◽  
Vol 10 (1) ◽  
pp. 222 ◽  
Author(s):  
Hanseul Hong ◽  
Young Yong Kim ◽  
Ronny Yongho Kim ◽  
Woojin Ahn
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Packet Transmission ◽  
Intelligent Transport System ◽  
Area Network ◽  
Channel Access ◽  
Next Generation ◽  
Wide Bandwidth ◽  
Channel Efficiency

As Intelligent Transport System (ITS) applications are diversified and amount of ITS data increases, high throughput and reliability are required in next-generation V2X communications. In order to meet such increased throughput and reliability requirements, IEEE 802.11bd, the next-generation V2X communication standard, has commenced standard development. One of the main features of IEEE 802.11bd is a 20-MHz bandwidth transmission. In this paper, a novel wide-bandwidth channel access scheme in next-generation Wireless Local Area Network (WLAN)-based vehicular communications is proposed. The proposed scheme is designed to provide fairness with other ITS devices and channel efficiency considering adjacent channel interference. By using the proposed scheme, through extensive simulations, it is verified that, while satisfying the fairness requirement with other ITS devices, the channel access delay of wide-bandwidth packet transmission can be optimized.

scholarly journals Multiple BSSs Association Based Spatial Clustering Group Access Protocol for Next Generation WLAN

2019 ◽  
Vol 37 (4) ◽  
pp. 809-815
Author(s):  
Yong Li ◽  
Bo Li ◽  
Mao Yang ◽  
Zhongjiang Yan
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Spatial Clustering ◽  
Spatial Location ◽  
Local Area ◽  
Area Network ◽  
Next Generation ◽  
Coverage Area ◽  
Collaboration Technology ◽  
Multi Band

The next generation Wireless Local Area Network (WLAN) IEEE 802.11be regards Extremely High Throughput (EHT) as its core technology goal, among which multi-band capability and AP cooperation technology are regarded as its key technologies. However, the existing research on Orthogonal Frequency Division Multiple Access (OFDMA) protocol does not consider the multi-band capability and AP collaboration technology of IEEE 802.11be, so the improvement of system performance is limited and does not meet the EHT requirement. Especially when the nodes in overlapping coverage area have a large number of traffic, it is more important to improve the throughput of nodes in overlapping coverage area. In order to improve the throughput of nodes in overlapping coverage area, this paper proposes a spatial clustering group OFDMA protocol associated with multiple Basic Service Sets (BSSs). The protocol allows nodes in overlapping coverage area to be associated with multiple BSSs at the same time by using multi-band capability, that is, multi-association; Using AP collaboration technology allows nodes to perform parallel backoff with channels on multiple BSSs to improve access efficiency. Nodes in the overlapping coverage area are associated with the channels of multiple BSSs for parallel backoff. Node completed backoff and successfully accessed triggers a spatial clustering group (SCG) with close to its spatial location. OFDMA mode is used by SCG to access and transmit, thus increasing the access opportunities of nodes within overlapping coverage, thereby improving the throughput. The simulation results show that using the SCG-OFDMA protocol proposed in this paper associated with two BSSs, its throughput of nodes within overlapping coverage can achieve 353.41% higher than the IEEE 802.11ax protocol and 558.33% higher than the OMAX protocol respectively.

scholarly journals Inclined Slot Loaded Proximity-Coupled Microstrip Antenna for WLAN

2012 ◽  
pp. 1-3
Author(s):  
Milind Thomas ◽  
Vikas Chelani ◽  
Rahul Ramesh ◽  
Sanjay Sukumar ◽  
Saurav Singh
Keyword(s):  
Microstrip Antenna ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Wide Bandwidth ◽  
Compact Antenna

The design of a miniaturized proximity-coupled microstrip antenna (PCMA) is presented here. The antenna has very small size, wide bandwidth and moderate gain and may be used as small, compact antenna for 5GHz band wireless local area network(WLAN). Simulated results using IE3D software are verified by measurement.

A Generalized TCP Fairness Control Method for Multiple-Host Concurrent Communications in Elastic WLAN System Using Raspberry Pi Access Point

2020 ◽  
Vol 11 (2) ◽  
pp. 18-40
Author(s):  
Rahardhita Widyatra Sudibyo ◽  
Nobuo Funabiki ◽  
Minoru Kuribayashi ◽  
Kwenga Ismael Munene ◽  
Hendy Briantoro ◽  
...  
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Control Method ◽  
Access Point ◽  
Local Area ◽  
Packet Transmission ◽  
Raspberry Pi ◽  
Area Network ◽  
Traffic Demand ◽  
Tcp Fairness

The IEEE802.11n wireless local-area network (WLAN) has been widely adopted due to the flexible coverage and lower installation cost. However, the TCP throughput unfairness was detected when multiple hosts concurrently communicate with a single access-point (AP). Previously, the authors proposed the TCP fairness control method for only two hosts in the elastic WLAN system using Raspberry Pi AP, which dynamically adapts the topology according to the traffic demand. The delay is introduced in the packet transmission to the faster host from the AP, which is optimized by the PI feedback control such that the measured throughput becomes equal between the hosts. In this paper, the authors proposed a generalization of this method for any number of hosts by newly introducing the target throughput as the equal goal among the hosts. It is dynamically updated using the measured throughputs. The effectiveness of the proposal is verified through experiments using the elastic WLAN system testbed with one AP and up to four hosts.

scholarly journals Inclined Slot Loaded Proximity-Coupled Microstrip Antenna for WLAN

2012 ◽  
pp. 1-3
Author(s):  
Milind Thomas ◽  
Vikas Chelani ◽  
Rahul Ramesh ◽  
Sanjay Sukumar ◽  
Saurav Singh
Keyword(s):  
Microstrip Antenna ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Wide Bandwidth ◽  
Compact Antenna

The design of a miniaturized proximity-coupled microstrip antenna (PCMA) is presented here. The antenna has very small size, wide bandwidth and moderate gain and may be used as small, compact antenna for 5GHz band wireless local area network (WLAN). Simulated results using IE3D software are verified by measurement.

scholarly journals Compact and Broadband Microstrip Antennas for Next Generation High-Speed Wireless Communication Using HIPERLAN/2

2007 ◽  
Vol 2007 ◽  
pp. 1-4 ◽  
Author(s):  
Jibendu Sekhar Roy ◽  
Milind Thomas
Keyword(s):  
Wireless Communication ◽  
High Speed ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Microstrip Antennas ◽  
Area Network ◽  
Next Generation ◽  
Rectangular Slot ◽  
Measurement Results

The investigations on rectangular-slot-loaded and V-slot-loaded proximity-coupled microstrip antennas are reported. The performances of two antennas are investigated for the application in wireless local area network 2 (HIPERLAN/2) using IE3D software and the computed results are verified by measurement. Results show that the antennas have wide bandwidth and moderate gain and may be used as small, compact antennas for HIPERLAN/2 communication.

scholarly journals Inclined Slot Loaded Proximity-Coupled Microstrip Antenna for WLAN

2012 ◽  
pp. 1-3
Author(s):  
Milind Thomas ◽  
Vikas Chelani ◽  
Rahul Ramesh ◽  
Sanjay Sukumar ◽  
Saurav Singh
Keyword(s):  
Microstrip Antenna ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Wide Bandwidth ◽  
Compact Antenna

The design of a miniaturized proximity-coupled microstrip antenna (PCMA) is presented here. The antenna has very small size, wide bandwidth and moderate gain and may be used as small, compact antenna for 5GHz band wireless local area network (WLAN). Simulated results using IE3D software are verified by measurement.

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