Protocols for media access control and power control in wireless networks

2003 ◽  
Author(s):  
V. Kawadia ◽  
S. Narayanaswamy ◽  
R. Rozovsky ◽  
R.S. Sreenivas ◽  
P.R. Kumar
Keyword(s):  
Wireless Networks ◽  
Access Control ◽  
Power Control ◽  
Media Access Control ◽  
Media Access

PERFORMANCE EVALUATION OF ADAPTIVE MEDIA ACCESS CONTROL PROTOCOLS FOR PERVASIVE WIRELESS NETWORKS

2002 ◽  
Vol 03 (03n04) ◽  
pp. 253-272 ◽  
Author(s):  
ALVIN LIM ◽  
KUI MOK
Keyword(s):  
Wireless Networks ◽  
Access Control ◽  
Multiple Access ◽  
Error Rates ◽  
High Density ◽  
Media Access Control ◽  
Slotted Aloha ◽  
Media Access ◽  
Control Protocols ◽  
Code Division Multiple

As pervasive and high-density wireless networks become increasingly common, it is critical to address the problems of intermittent disconnection, high error rate and collision that cause degradation in the performance of wireless media access control protocols, such as slotted ALOHA Time Division Multiple Access (slotted ALOHA/TDMA) and Direct Sequence Code Division Multiple Access (DS/CDMA). We propose adaptive techniques for improving performance of media access protocols through awareness of the mobile communication environment. These techniques involve detection of intermittent disconnection, high error rates, and collisions. Upon detection and notification of these conditions by snooping devices, the media access control layer adapts its operation and synchronization accordingly to reduce delay and loss of bandwidth. Results from our simulation studies show that adaptive TDMA improves performance by as much as 12 times over basic TDMA and adaptive CDMA improves by as much as 4 times over basic CDMA in wireless network with high density cells. Overall, adaptive CDMA still performs better than adaptive TDMA by about 4 times.

Dynamic cooperative media access control for wireless networks

2014 ◽  
Vol 15 (13) ◽  
pp. 1759-1772 ◽  
Author(s):  
Bin Cao ◽  
Yun Li ◽  
Chonggang Wang ◽  
Gang Feng
Keyword(s):  
Wireless Networks ◽  
Access Control ◽  
Media Access Control ◽  
Media Access
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