Survey of various routing approaches based on quality-of-service (QoS) criteria in MANET
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paper_title: Challenges and Recent Advances in QoS Provisioning, Signaling, Routing and MAC protocols for MANETs

paper_content:

Mobile ad hoc networks (MANET), which comprise of mobile nodes connected wirelessly, are emerging as a very important technology for future generation of wireless mobile and ubiquitous computing. MANETs are being used in numerous application domains from emergency rescue and relief to wireless sensor networks. To support real-time communications (such as audio and video) over MANETs, new quality of service (QoS) provisioning mechanisms need to be developed. There are many challenges in QoS provisioning for MANETs such as dynamically changing topology, wireless capacity limitations, heterogeneous network environment, limited battery power etc. Previous QoS surveys in MANET have only looked at QoS provisioning models, signaling and routing. This paper presents a complete survey of the challenges and current state of the art of MANET QoS routing, signaling and MAC protocols as well as the various MANET QoS models that are being developed.
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paper_title: A Cross-layer QoS Mapping Framework for Mobile Ad Hoc Networks

paper_content:

AbstractResearch in Quality of Service (QoS) provisioning for wireless ad hoc networks is receiving growing interest due to the rising necessity for supporting multimedia applications in such networks. Quality of Service provisioning is a multilayer problem, where the interaction between protocols at different layers is of paramount importance. In this paper, we are looking at the problem of QoS provisioning from the perspective of three layers – application layer, network layer and medium access control (MAC) layer. Our goal is to design a QoS framework which maps QoS parameters across these three layers of the protocol stack, to support a stronger notion of per-class service guarantees in terms of throughput and delay in ad hoc networks. Further, to cope with network dynamics, MAC layer and network layer are made to adapt their behavior based on both dynamic network conditions and QoS requirements of admitted flows. An MAC layer adaptation takes place in terms of dynamic contention window adjustment per...
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paper_title: Cross-Layer Design for QoS Support in Multihop Wireless Networks

paper_content:

Due to such features as low cost, ease of deployment, increased coverage, and enhanced capacity, multihop wireless networks such as ad hoc networks, mesh networks, and sensor networks that form the network in a self-organized manner without relying on fixed infrastructure is touted as the new frontier of wireless networking. Providing efficient quality of service (QoS) support is essential for such networks, as they need to deliver real-time services like video, audio, and voice over IP besides the traditional data service. Various solutions have been proposed to provide soft QoS over multihop wireless networks from different layers in the network protocol stack. However, the layered concept was primarily created for wired networks, and multihop wireless networks oppose strict layered design because of their dynamic nature, infrastructureless architecture, and time-varying unstable links and topology. The concept of cross-layer design is based on architecture where different layers can exchange information in order to improve the overall network performance. Promising results achieved by cross-layer optimizations initiated significant research activity in this area. This paper aims to review the present study on the cross-layer paradigm for QoS support in multihop wireless networks. Several examples of evolutionary and revolutionary cross-layer approaches are presented in detail. Realizing the new trends for wireless networking, such as cooperative communication and networking, opportunistic transmission, real system performance evaluation, etc., several open issues related to cross-layer design for QoS support over multihop wireless networks are also discussed in the paper.
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paper_title: Cross-layer signalling for next-generation wireless systems

paper_content:

Cross-layer design is becoming a popular design methodology for the IP-based next-generation wireless systems, and cross-layer signalling is a key enabler of such a methodology. Several methods are emerging to achieve this signalling in layered protocol stacks. Through these methods, the refined wireless systems are expected to gain significant performance improvement and/or obtain extended functionality that is very hard if not impossible to obtain from a single layer signalling. This paper begins with a survey of representative cross-layer signalling methods. Based on the analysis, the paper proposes an efficient, flexible and comprehensive scheme defined here as cross-layer signalling shortcuts (CLASS), and then a set of evaluation criteria is defined to compare CLASS with current schemes. Finally, the possible application areas of CLASS are identified, and a reference application programme is presented for applying CLASS into various management areas.
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paper_title: Cross-Layer Design for QoS Support in Wireless Multimedia Sensor Networks

paper_content:

The rapid growth in micro-electronics technology and research in wireless sensor networks (WSNs) has made it possible to realize multimedia delivery on wireless multimedia sensor networks (WMSNs), consisting of tiny sensing devices. The volume and characteristics of multimedia data produced by WMSNs is quite different from the scalar data generated by conventional WSNs. This has raised the need to explore efficient routing protocols for multimedia data delivery in WMSNs, particularly supporting stringent quality of service (QoS). In this paper, we propose a novel cross-layer framework for QoS support in WMSNs, which optimizes the functionalities of communication protocols to maximize the number of video stream requests to be delivered while the imposed distortion constraint on the streams are met. QoS requirements are mapped on joint operations of application, network, MAC and link layers of the underlying communication framework. The experimental results demonstrate that the proposed framework achieves its objective efficiently.
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paper_title: INSIGNIA: An IP-Based Quality of Service Framework for Mobile ad Hoc Networks

paper_content:

We present the design, implementation, and evaluation of INSIGNIA, an IP-based quality of service framework that supports adaptive services in mobile ad hoc networks. The framework is based on an in-band signaling and soft-state resource management approach that is well suited to supporting mobility and end-to-end quality of service in highly dynamic environments where the network topology, node connectivity, and end-to-end quality of service are time varying. Architecturally INSIGNIA is designed to support fast reservation, restoration, and end-to-end adaptation based on the inherent flexibility and robustness and scalability found in IP networks. We evaluate the framework, paying particular attention to the performance of the in-band signaling system, which helps counter time-varying network dynamics in support of the delivery of adaptive services. Our results show the benefit of our framework under diverse mobility, traffic, and channel conditions.
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Title: Survey of Various Routing Approaches Based on Quality-of-Service (QoS) Criteria in MANET

Section 1: Introduction
Description 1: Explain the importance of routing and QoS in MANETs, the challenges involved, and the scope for research in this area.

Section 2: QoS In MANET
Description 2: Discuss the unique challenges of providing QoS in MANETs compared to traditional wired networks, and explain the significance of enhancing routing protocols to support QoS in MANETs.

Section 3: Survey Of Related Work
Description 3: Provide a comprehensive review of existing research works related to QoS provisioning at various levels such as signaling, MAC, and routing layers, and describe the different cross-layer designs proposed for QoS support in MANETs.

Section 4: Conclusion
Description 4: Summarize the findings of the survey, highlight the challenges faced in QoS routing in MANETs, and describe the general features required in QoS-aware routing protocols.