A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Optimal User Association in Hybrid WLANs under Bandwidth Constraints
The 802.11 protocol based Wireless LANs (WLANs) has become a conventional way to Internet access for mobile devices. In default, each user device accesses a WLAN by associating an access point (AP) with the strongest Signal strength among all available APs. For each network application on user devices, the minimum bandwidth which the application needs for providing regular service is demanded. The default signal strength based user association cannot satisfy this new bandwidth demand from network applications. Although extensive research work is done on user association techniques, most of them focus on load balancing and fairness issues without considering the bandwidth demands of user devices. In this paper, we consider a joint user association problem for a WLAN under hybrid network architecture, while satisfying the bandwidth demand of user devices. Different from previous work, graph theory based methods are utilized to solve this optimization problem for both unit bandwidth demand and general bandwidth demand cases. With the proposed graph transformation techniques, the optimization problem with two cases is transformed to maximum network flow and maximum weighted matching problems, respectively. Theoretic proofs for the optimality of our algorithms are presented and simulation results further validate the superiority of our algorithms.
Optimal User Association in Hybrid WLANs under Bandwidth Constraints
The 802.11 protocol based Wireless LANs (WLANs) has become a conventional way to Internet access for mobile devices. In default, each user device accesses a WLAN by associating an access point (AP) with the strongest Signal strength among all available APs. For each network application on user devices, the minimum bandwidth which the application needs for providing regular service is demanded. The default signal strength based user association cannot satisfy this new bandwidth demand from network applications. Although extensive research work is done on user association techniques, most of them focus on load balancing and fairness issues without considering the bandwidth demands of user devices. In this paper, we consider a joint user association problem for a WLAN under hybrid network architecture, while satisfying the bandwidth demand of user devices. Different from previous work, graph theory based methods are utilized to solve this optimization problem for both unit bandwidth demand and general bandwidth demand cases. With the proposed graph transformation techniques, the optimization problem with two cases is transformed to maximum network flow and maximum weighted matching problems, respectively. Theoretic proofs for the optimality of our algorithms are presented and simulation results further validate the superiority of our algorithms.
Optimal User Association in Hybrid WLANs under Bandwidth Constraints
Wan, Xili (author) / Guan, Xinjie (author) / Shen, Yan (author) / Choi, Baek-Young (author)
2018-09-01
295281 byte
Conference paper
Electronic Resource
English
Hybrid DCF Supporting Smart Antennas in WLANs
| IEEE | 2006
Optimal design under time-variant reliability constraints
| British Library Online Contents | 2000