CaDAR: An Efficient Routing Algorithm for Wireless-Optical Broadband Access Network

Reaz, Abu; Ramamurthi, Vishwanath; Sarkar, S.; Ghosal, Dipak; Dixit, Sudhir; Mukherjee, Biswanath

doi:10.1109/icc.2008.975

Cited by 31 publications

(22 citation statements)

References 16 publications

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“…A dynamic reconfiguration algorithm in WDM PONs is proposed in [9] for the better bandwidth utilization. Delay-Aware Routing Algorithm (DARA) [10] and Capacity and Delay Aware Routing Algorithm (CaDAR) [11] have been proposed to address the routing issue in the FiWi network. Moreover, a centralized integrated routing algorithm is proposed in [12] to achieve the load balance at ONUs and to maximize the network throughput.…”

Section: Related Workmentioning

confidence: 99%

A Study of Network Throughput Gain in Optical-Wireless (FiWi) Networks Subject to Peer-to-Peer Communications

Zheng

Wang

2009

2009 IEEE International Conference on Communications

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Optical-Wireless (FiWi) access network is a newly emerged access network architecture which integrates passive optical networks (PONs) with wireless mesh networks (WMNs) to provide the ubiquitous, low cost, high bandwidth last mile Internet access. Though the PON subnetwork of FiWi network can provide high bandwidth, the interference in the wireless subnetwork still limits the throughput of FiWi network if all traffic goes online to the Internet. However, when peer-to-peer communication from one wireless client to another wireless client is introduced, the proposed integration of PONs and WMNs can significantly improve the network throughput. In traditional WMNs, peer-to-peer communication from one wireless client to another wireless client is carried in the wireless network, which is subject to interferences in wireless communications. In FiWi network, peer-to-peer communication can be carried through the wireless-optical-wireless mode in which the traffic is sent from the source wireless client to its nearest ONU, which is then sent to the ONU close to the destination wireless client through the PON subnetwork and then delivered to the destination wireless client. Such wireless-optical-wireless communication mode introduced by FiWi networks can sustain the interference in wireless subnetwork, thus improving the network throughput. This paper aims to study the network throughput gain in FiWi network subject to peer-to-peer communications and parameters which can affect the network throughput gain. We first have a fair modeling of FiWi networks and traditional WMNs. We then present an LP based routing algorithm for FiWi networks. Extensive simulations have been carried to study the network throughput gain in FiWi networks subject to peer-to-peer communications compared with traditional WMNs. The work provides insightful observations for fully utilizing advantages brought by the integration of PONs and WMNs in FiWi networks.

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Section: Related Workmentioning

confidence: 99%

A Study of Network Throughput Gain in Optical-Wireless (FiWi) Networks Subject to Peer-to-Peer Communications

Zheng

Wang

2009

2009 IEEE International Conference on Communications

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“…So it's possible for us to find an alternative path P 2 in the wireless subnetwork with relaxed path delay no more than the delay bound and meanwhile with smaller maximal link delay compared with P 1 by utilizing the delay gap. Since the time frame length in the TDMA schedule in [2] and the average wireless lilnk delay in [4] have the same measure metric as ms and the delay gap is at most one time frame, it's practicable to find the alternative path. In particular, we define the Interference Aware and Delay Bounded Routing (IADBR) problem as finding the path with its path delay no more than the delay bound and meanwhile with the minimal maximal link delay.…”

Section: Figure 1 Architecture Of a Woan Networkmentioning

confidence: 99%

“…In WOAN, various routing algorithms have been proposed in [1] [3] [4] focusing on the traffic to the Internet. Considering traffic aggregated at the wireless mesh router a destinated to the Internet, suppose that it goes through the shortest delay path in the wireless subnetwork to arrive at a ONU (gateway).…”

Section: Figure 1 Architecture Of a Woan Networkmentioning

confidence: 99%

Interference Aware and Delay Bounded Routing in Hybrid Wireless-Optical Access Network

Zheng

Wang

2009

2009 WRI International Conference on Communications and Mobile Computing

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Hybrid Wireless-Optical Access Network(WOAN) is a newly emerged network which integrates passive optical networks(PONs) and wireless mesh neworks(WMNs) to provide the ubiquitous, high bandwidth last mile Internet access. In WOAN, transmission delay for traffic up to the Internet consists of wireless path delay in WMNs and waiting delay at ONUs due to the TDMA schedule. The ONU from which transmission delay is minimal is chosen to be the destination for traffic and the minimal transmission delay is defined as delay bound. In the paper, we intend to find the wireless path to the destinated ONU with path delay no more than delay bound and meanwhile with the minimal maximal link delay, which is defined as Interference Aware and Delay Bounded Routing (IADBR) problem. We propose both centralized and distributed algorithms to solve IADBR. Simulation results show that the distributed algorithm performs quite closely to the optimal centralized algorithm and performs much better than the shortest path algorithm.

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“…In this paper work is done on reducing energy consumption not only at optical part but also at the wireless end of the FiWi networks. The proposed energy saving algorithm, referred to as Green FiWi (GFiWi) switches maximum number of nodes into sleep mode where the Capacity and Delay Aware Routing algorithm [14] is exploited in order to route the traffic through least delay path. Figure 1 shows the general architecture of a FiWi network consisting of a large number of nodes in the wireless front end, due to which majority of the nodes remain idle most of the time particularly when the traffic is low in the network [15].…”

Section: Introductionmentioning

confidence: 99%

Greening FiWi access networks

Ali

Ullah

Tauqeer

et al. 2011

2011 7th International Conference on Emerging Technologies

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Fiber-Wireless (FiWi) is the hybrid architecture of access networks. Since large amount of energy consumption of internet is due to the access networks, so in this paper Green FiWi (GFiWi) algorithm is proposed that switches the nodes of FiWi access networks to sleep mode in order to reduce energy consumption of FiWi networks not only at the optical but also at wireless part of FiWi. Simulation results showed that there is a slight degradation in the performance despite of the fact that most of the nodes are switched to sleep mode. The energy saving is compared with the state of the art existing algorithm. The GFiWi not only saved significant amount of energy but also achieved improved performance as compared to other existing approaches.

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CaDAR: An Efficient Routing Algorithm for Wireless-Optical Broadband Access Network

Cited by 31 publications

References 16 publications

A Study of Network Throughput Gain in Optical-Wireless (FiWi) Networks Subject to Peer-to-Peer Communications

A Study of Network Throughput Gain in Optical-Wireless (FiWi) Networks Subject to Peer-to-Peer Communications

Interference Aware and Delay Bounded Routing in Hybrid Wireless-Optical Access Network

Greening FiWi access networks

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