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This paper proposes a medium access control (MAC) protocol for ad hoc wireless networks that utilizes multiple channels dynamically to improve performance. The IEEE 802.11 standard allows for the use of multiple channels available at the physical layer, but its MAC protocol is designed only for a single channel. A single-channel MAC protocol does not work(More)
Wireless ad hoc networks often suffer from rapidly degrading performance as the number of users increases in the network. One of the major reasons for this rapid degradation of performance is the fact that users are sharing a single channel. Although widely deployed standards such as IEEE 802.11 provides multiple non-overlapping channels, most protocols for(More)
In this paper, we present a routing and channel assignment protocol for multi-channel multi-hop wireless networks. We view a multi-hop network as an extension to infrastructure networks, where a mobile host may connect to an access point using multi-hop wireless routes, via other mobile hosts or wireless routers. The access points are configured to operate(More)
Supporting high throughput is an important challenge in multi-hop mesh networks. Popular wireless LAN standards, such as IEEE 802.11, provision for multiple channels. In this article, we consider the use of multiple wireless channels to improve network throughput. Commercially available wireless network interfaces can typically operate over only one channel(More)
The Internet andWeb technologies have originally been developed assuming an ideal world where all users are honorable. However, the dark side has emerged and bedeviled theworld. This includes spam,malware,hacking, phishing, denial of service attacks, click fraud, invasion of privacy, defamation, frauds, violation of digital property rights, etc. The(More)
In this paper, we propose a protocol for synchronizing time in multihop wireless networks. Protocols for power management or dynamic channel assignment often require synchronous operations, such as waking up at the same time or listening to a common channel. Having the nodes synchronized in time is often crucial for these protocols to work. However, the(More)
A hybrid wireless network is an extension to an infrastructure network, where a mobile host may connect to an access point using multi-hop wireless routes, via other mobile hosts. The access points are configured to operate on one of multiple available channels. Mobile hosts and wireless routers can select its operating channel dynamically through channel(More)
As public deployment of wireless local area networks (WLANs) has increased and various applications with different service requirements have emerged, fairness and quality of service (QoS) are two imperative issues in allocating wireless channels. This study proposes a fair QoS agent (FQA) to simultaneously provide per-class QoS enhancement and per-station(More)
As the demands for various multimedia services requiring high capacity increase, shortage of wireless resources becomes a serious problem in cellular networks. In order to reduce the heavy load and increase overall capacity of cellular networks, internetworking between WLANs and cellular networks has being considered. However, in the internetworking of(More)