Energy efficient design of portable wireless systems
ISLPED '00 Proceedings of the 2000 international symposium on Low power electronics and design
An energy consumption model for performance analysis of routing protocols for mobile ad hoc networks
Mobile Networks and Applications
Localized algorithms in wireless ad-hoc networks: location discovery and sensor exposure
MobiHoc '01 Proceedings of the 2nd ACM international symposium on Mobile ad hoc networking & computing
Quality of service schemes for IEEE 802.11 wireless LANs: an evaluation
Mobile Networks and Applications
WLAN Location Determination via Clustering and Probability Distributions
PERCOM '03 Proceedings of the First IEEE International Conference on Pervasive Computing and Communications
Improving the Aggregate Throughput of Access Points in IEEE 802.11 Wireless LANs
LCN '03 Proceedings of the 28th Annual IEEE International Conference on Local Computer Networks
On improving the performance of IEEE 802.11 with relay-enabled PCF
Mobile Networks and Applications
Minimizing energy for wireless web access with bounded slowdown
Wireless Networks
A modified power saving mode in IEEE 802.11 distributed coordinator function
Computer Communications
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Infrastructure-based wireless LAN technology has been widely used in today's personal communication environment. Power efficiency and battery management have been the center of attention in the design of handheld devices with wireless LAN capability. In this paper, a hybrid protocol named improved PCF operation is proposed, which intelligently chooses the access point- (AP-) assisted DCF (distributed coordinator function) and enhanced PCF (point coordinator function) transmission mechanism of IEEE 802.11 protocol in an infrastructure-based wireless LAN environment. Received signal strength indicator (RSSI) is used to determine the tradeoff between direct mobile-to-mobile transmission and transmission routed by AP. Based on the estimation, mobile stations can efficiently communicate directly instead of being routed through AP if they are in the vicinity of each other. Furthermore, a smart AP protocol is proposed as extension to the improved PCF operation by utilizing the historical end-to-end delay information to decide the waking up time of mobile stations. Simulation results show that using the proposed protocol, energy consumption of mobile devices can be reduced at the cost of slightly longer end-to-end packet delay compared to traditional IEEE 802.11 PCF protocol. However, in a non-time-critical environment, this option can significantly prolong the operation time of mobile devices.