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The available bandwidth information is important to the admission control, channel scheduling and other schemes; moreover, it is an important parameter to evaluate the quality of service in Mobile Ad Hoc network. With analysis of the difference between bandwidth estimation scheme in wired network and wireless network, the available bandwidth in Mobile Ad Hoc network is defined. The factors which infect...
In this paper, a joint topology-transparent scheduling and multi-path quality-of-service (QoS) routing in mobile ad hoc networks is proposed. Topology-transparent scheduling (TTS) is used as the MAC in both the control and data channels. The proposed scheme has a new capability of establishing multiple QoS sub-paths, even for a single session connection. When the route search cannot find a single...
This paper presents a simple resource control mechanism with traffic scheduling for 2-hop ad-hoc networks, in which the request-to-send (RTS) packet is utilized to deliver feedback information. With this feedback information, the transmission opportunity (TXOP) limit of the sources can be controlled to balance the traffic. Furthermore, a bottleneck transmission scheduling scheme is introduced to provide...
IEEE 802.11e (EDCA) standard is concerned to support QoS in wireless ad-hoc networks. However, EDCA cannot control traffic when there is a congestion to guarantee QoS required by real-time and multimedia applications. Therefore, the ill-behaved sources consume the most of bandwidth allowed. That leads to some of source nodes (i.e. out-ranged nodes) suffer from the lack of bandwidth and unfairness...
Mobile ad Hoc network (MANET) and sensor networks have no fixed infrastructures such as Base Stations and Towers, and have limited bandwidth across the network elements. They use multi-hop radio communications to deliver multi-service (voice, data, and video) information. Each network element can either send a packet or receive a packet but not both. Therefore, synchronization between radios must...
Call admission control (CAC) plays a critical role in the performance of the IEEE 802.16 mesh networks. The IEEE 802.16 standard does not specify any CAC mechanisms. In this paper, based on bandwidth estimation, we propose a call admission control scheme in IEEE 802.16 centralized scheduling mesh mode. The proposed scheme does the admission control function by using the characteristic defined in the...
Supporting multimedia quality of service (QoS) is a necessary and critical requirement for next generation wireless networks. Wireless Mesh Networking is envisioned as an economically viable paradigm and a promising technology for supporting multimedia QoS. The non-mobile mesh routers with the capability of having less-constrained transmission power are the distinct characteristics for this type of...
In this paper we have proposed an adaptive scheduling algorithm to suit group mobility scenarios in the mobile WiMAX. The QoS scheduling scheme aims to minimize the end-to-end delay for real-time traffic. IEEE 802.16e is a wireless broadband network standard aimed at providing robust, high data rate mobile communication. The issue of group mobility in mobile WiMAX networks has not been explored so...
In this paper, a framework for joint topology-transparent scheduling (TTS) and quality-of-service (QoS) routing in mobile ad hoc networks is proposed. Inspired by the fact that TTS can guarantee single-hop QoS support without the overhead due to the re-computation of transmission schedules when the network topology changes, TTS is chosen as the medium access control (MAC) in both the control and data...
This paper explores the attributes, layering models and objective functions in cross layer designs for mobile ad hoc wireless networks by taking all the statistical characteristics and constraints from the physical (PHY) layer, media access control (MAC) layer and network (NET) layer into consideration. This paper reviews the entire network optimization across all the PHY/MAC/NET layers. At the PHY...
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