scholarly journals Development of Wireless LAN Base Station with QoS Control Based on Web-QoE by Bandwidth Control and Priority Control

2018 ◽  
Vol 101 (5) ◽  
pp. 12-21 ◽  
Author(s):  
SHIHO ASANO ◽  
YOSHIHIRO ITO
Author(s):  
Krishnanjali. A. Magade ◽  
Abhijit patankar ◽  
M. A. Potey

This suggests new strategies for balancing load in a wireless network connected in star topology. The loads are assigned to each processor using divisible load theory & Different techniques [II], [III], [IV], and [V]. Divisible load theory suggests that a load can be divided arbitrarily such that each fraction of the load can be independently assigned and computed in any processor present in the network. Wireless networks are connected in such a manner that they as assemble a distributed system most of the times, which makes load balancing an important technique to maximize the throughput from the system. A wireless sensor network generally consists of a base station (or Gateway) which communicates with other nodes present in the network. The other nodes are used for Measuring and collecting various environmental and Intelligence related data. The network that we have considered is connected with the central node being the base station and the other nodes are used for calculation of load distributed by the central node. Load balancing involves distribution of all computational and communicational activities over two or more processors, links or any other computational devices present in the network. The main thing behind this is load balancing is to reduce the execution time of the load and to make sure that all the resources present in the system are utilized optimally. The IEEE 802.11 standard does not provide any mechanism to resolve load imbalance. To reduce this deficiency, various load balancing schemes have been designed. These techniques commonly take the approach of directly controlling the user-AP association by deploying Proprietary client software or hardware. Load balancing Features in their device drivers, AP firm wares, and WLAN cards. In these solutions, APs broadcast their load levels to users via modified beacon messages and each user chooses the least-loaded AP.


2013 ◽  
Vol E96.B (2) ◽  
pp. 419-429 ◽  
Author(s):  
Akira KISHIDA ◽  
Masashi IWABUCHI ◽  
Toshiyuki SHINTAKU ◽  
Tetsu SAKATA ◽  
Takefumi HIRAGURI ◽  
...  

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Yong Wang ◽  
Fu Xu ◽  
Zhibo Chen ◽  
Yu Sun ◽  
Haiyan Zhang

Quality of service (QoS) is an important performance indicator for Web applications and bandwidth is a key factor affecting QoS. Current methods use network protocols or ports to schedule bandwidth, which require tedious manual configurations or modifications of the underlying network. Some applications use dynamic ports and the traditional port-based bandwidth control methods cannot deal with them. A new QoS control method based on local bandwidth scheduling is proposed, which can schedule bandwidth at application level in a user-transparent way and it does not require tedious manual configurations. Experimental results indicate that the new method can effectively improve the QoS for applications, and it can be easily integrated into current Web applications without the need to modify the underlying network.


2005 ◽  
Vol 17 (2) ◽  
pp. 218-225 ◽  
Author(s):  
Jun-ichi Meguro ◽  
◽  
Rui Hirokawa ◽  
Jun-ichi Takiguchi ◽  
Takumi Hashizume ◽  
...  

This paper describes an autonomous mobile surveillance used in plants in high-rise buildings. This consists of a wireless LAN, a base station, and an autonomous vehicle. The vehicle uses GPS/INS navigation using network-based Real-Time Kinematic GPS (RTK-GPS) with Positioning Augmentation Services (PASTM, Mitsubishi Electric Corporation 2003), an Area Laser Radar (ALR), a slave camera, and an Omni-Directional Vision (ODV) sensor for surveillance and reconnaissance. The vehicle switches control modes – normal, road tracking, and crossing recognition – based on vehicle navigation error. A field test shows that the vehicle tracks a planned straight paths within 0.10m accuracy and planned curved paths within 0.25m even without RTK fixed solutions. Field experiments and analysis prove that the proposed navigation provides sufficient navigation and guidance accuracy under poor satellite geometry and visibility, and that the panorama image database with absolute positioning is useful for surveillance.


Sign in / Sign up

Export Citation Format

Share Document