Resource estimation on wireless backhaul networks
2
Citation
17
Reference
20
Related Paper
Citation Trend
Abstract:
The increased usage of IEEE 802.11 wireless backhaul networks and the growing popularity of real time applications, such as VoIP, presents a challenging resource management problem due to the limited capacity of wireless networks. At high traffic volumes, measurements have shown that packet collisions and interference in 802.11 networks can lead to degraded performance to the extent that users experience unacceptably low throughput, which can ultimately lead to complete network breakdown [1]. A resource management framework that limits network flows can prevent network breakdown and improve the performance of throughput and delay-sensitive multimedia applications. To address this problem, we present a measurement-driven framework that leverages wireless characteristics for intelligent admission control in a static wireless network. Experiments on a 25 node wireless testbed show that the proposed scheme can enhance network performance such that the QoS requirements of real time applications, such as VoIP, can be met.Keywords:
Backhaul (telecommunications)
Testbed
Wireless WAN
With the constant development of wireless technologies, the usageof wireless devices tends to increase even more in the future.Wireless multi-hop networks (WMNs) have emerged as a keytechnology to numerous potential scenarios, ranging from disasterrecovery to wireless broadband internet access. The distributedarchitecture of WMNs enables nodes to cooperatively relay othernode's packets. Because of their advantages over other wirelessnetworks, WMNs are undergoing rapid progress and inspiringnumerous applications. However, many technical issues still existin this field. In this thesis we investigate how Voice over IP(VoIP) and peer-to-peer (P2P) application are influenced bywireless multi-hop network characteristics and how to optimizethem in order to provide scalable communication.We first consider the deployment of VoIP service in wirelessmulti-hop networks, by using the Session Initiation Protocol (SIP)architecture. Our investigation shows that the centralized SIParchitecture imposes several challenges when deployed in thedecentralized wireless multi-hop environment. We find that VoIPquality metrics are severely degraded as the traffic and number ofmultiple hops to the gateway increase. In the context ofscalability, we further propose four alternative approaches whichavoid current limitations.In the second part of this thesis we tackle the network capacityproblem while providing scalable VoIP service over wirelessmulti-hop networks. The performance evaluation shows the influenceof intra and inter-flow interference in channel utilization, whichdirect impacts the VoIP capacity. In order to avoid the small VoIPpacket overhead, we propose a new adaptive hop-by-hop packetaggregation scheme based on wireless link characteristics. Ourperformance evaluation shows that the proposed scheme can increasethe VoIP capacity by a two-fold gain.The study of peer-to-peer applicability over wireless multi-hopnetworks is another important contribution. A resource lookupapplication is realized through structured P2P overlay. We showthat due to several reasons, such as characteristics of wirelesslinks, multi-hop forwarding operation, and structured P2Pmanagement traffic aggressiveness the performance of traditionalP2P applications is rather low in wireless multi-hop environments.Therefore, we suggested that a trade-off between the P2P lookupefficiency and the P2P management traffic overhead can be achievedwhile maintaining the overlay network consistency in wirelessmulti-hop networks.
Cite
Citations (16)
Applying Software Defined Network (SDN) technology to wireless network attracts much attention. Our previous study proposed several channel utilization methods based on SDN/OpenFlow-enabled multi-channel wireless mesh network (WMN). However, since control messages are transmitted with data traffic on a same channel in WMN, it inevitably affects the network capacity. Especially, the amount of control messages for collecting statistical information of each flow (FlowStats) linearly increases in accordance with the number of flows, thereby being the dominant overhead. In this paper, we propose a method that prevents the increase of control traffic while maintaining network performance. Specifically, our proposed method uses statistical information of each interface (PortStats) instead of FlowStats, and handles multiple flows on the interface together. To handle a part of flows, we propose a way to estimate statistical information of individual flow without extra control messages. Finally, we show that the proposed method can maintain good network capacity with less packet losses and less control messages.
OpenFlow
Control channel
Interface (matter)
Cite
Citations (9)
The emergence of nomadic applications have generated a lot of interest in wireless network infrastructures which support multimedia services. We propose a bandwidth routing algorithm for multimedia support in a multihop wireless network. This network can be interconnected to wired networks (e.g. ATM or the Internet) or stand alone. Our bandwidth routing includes bandwidth calculation and reservation schemes. Under such a routing algorithm, we can derive a route to satisfy the bandwidth requirement for the QoS constraint. At a source node, the bandwidth information can be used to decide to accept a new call or not immediately. This is specially important to carry out a fast handoff when interconnecting to an ATM backbone infrastructure. It enables an efficient call admission control. The simulation results show that the bandwidth routing algorithm is very useful in extending the ATM virtual circuit service to the wireless network. Different types of QoS traffic can be integrated in such a dynamic radio network with high performance.
Call Admission Control
Bandwidth management
Dynamic Bandwidth Allocation
Cite
Citations (60)
Multimedia communication over wireless Ad-hoc networks has become the driving technology for many of the important applications, experiencing dramatic market growth and promising revolutionary experiences in personal communication, gaming, entertainment, military, security, environment monitoring, and more.The advances in wireless communications and growth of real-time applications have necessitated the development of wireless networks that can support high Quality of Service (QoS) and power control.A node in an ad hoc network is normally battery operated which poses a huge constraint on the power consumption of such a node.Hence, designing a power efficient MAC protocol for ad hoc wireless networks is a major challenge.In this paper, we propose a CDMA based power controlled medium access protocol for mobile and ad hoc network (MNA).The protocol conserves power and provides QoS guarantees for multimedia traffics.In that network one of the fundamental challenger in MANETs is how to increase the overall network throughputs well as reading the delay while maintaining how energy consumption for packet processing in communication.simulation results shows that the performance of the protocol with increase in traffic while QoS is better in terms of Energy consumption, throughput, & communication delay than existing protocol.
Cite
Citations (2)
Cite
Citations (0)
The future wireless mobile devices considered in this paper incorporate three key features: (1) Wireless Wide Area Network (WWAN) radios, (2) short-range high-data-rate Wireless Personal Area Network (WPAN) radios, and (3) large (>100GB) amounts of on-board cache. Approaches for finding and exploiting knowledge of Social Networks to decrease spectrum congestion and network latency in networks employing such dual-mode wireless mobile devices, including special policies for users such as emergency responders, are presented. Example scenarios indicate that significant improvements in overall quality of service quality can be achieved when wireless network service providers exploit knowledge of social networks to guide on-device caching on such networks. Analyses based on realistic scenarios indicate that the proposed approach has the potential to (1) avoid blocking of key users during an emergency, (2) decrease average wireless network latency by up to 5X, and (3) decrease spectrum congestion by up to 1.3X.
Wireless WAN
Municipal wireless network
Cite
Citations (1)
Interesting wireless networking scenarios exist wherein network services must be guaranteed in a dynamic fashion for some priority users. For example, in disaster recovery, members need to be able to quickly block other users in order to gain sole use of the radio channel. As it is not always feasible to physically switch off other users, we propose a new approach, termed selective packet destruction (SPD) to ensure service for priority users. A testbed for SPD has been created, based on the Rice University Wireless open-Access Research Platform and been used to examine the feasibility of our approach. Results from the testbed are presented to demonstrate the feasibility of SPD and show how a balance between performance and acknowledgement destruction rate can be achieved. A 90% reduction in TCP & UDP traffic is achieved for a 75% MAC ACK destruction rate.
Testbed
Acknowledgement
Cite
Citations (0)
In this chapter we present an energy-efficient highly adaptive network interface architecture and a novel data link layer protocol for wireless networks that provides Quality of Service (QoS) support for diverse traffic types. Due to the dynamic nature of wireless networks, adaptations in bandwidth scheduling and error control are necessary to achieve energy efficiency and an acceptable quality of service. In our approach we apply adaptability through all layers of the protocol stack, and provide feedback to the applications. In this way the applications can adapt the data streams, and the network protocols can adapt the communication parameters.
Protocol stack
Adaptability
Data link layer
Cite
Citations (0)
Zone Routing Protocol
Cite
Citations (16)
Wireless cellular network has recently emerged as one of the popular technologies for the next generation network due to the development of smart phone technologies which resulted in high mobility of user and achieving Quality of Service (QoS) for application like video conferencing, video streaming etc... requires an efficient multicast routing protocol which is one of the most key performance metrics. Due to topology dynamic it is a challenging task in order to achieve a certain level of QoS, complex algorithms and protocols are needed for this purpose. The Network graph conditions are neglected during the design of an existing multicast protocol which severely affects the performance of a multicast protocol. To address this here the author proposes an efficient network graph pre-processing approach to enable traffic engineering and enhance the performance of network by QoS provisioning, to address the multicast routing issue in wireless cellular network. In this approach we use organized affirmation control scheme is implemented to improvise D2D (Device to Device) communications into cellular network to overcome the limitations of mobile ad-hoc network. It enables to enhance the estimated network performance which is gained from offloading cellular traffic onto D2D architecture. Extensive simulation has been conducted for various parameters such as slot utilization and energy efficiency and the results show that the proposed methodology can significantly improve the performance of QoS multicast routing in wireless cellular ad-hoc network in order to enhance device battery life and overall network efficiency. The architecture shows that D2D communications is forming an ad-hoc structure in cellular network to provide a significant improvement in QoS efficiency and also enable overall network capacity performance by individual user's energy optimization.
Cite
Citations (2)