The gray zone problem in IEEE 802.11b based ad hoc networks

Lundgren, Henrik; Nordström, Erik; Tschudin, Christian

doi:10.1145/581291.581311

Cited by 55 publications

(43 citation statements)

References 2 publications

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“…However the designated forwarder may leave the transmission range of the sender or acquires a position which is not in the legitimate packet forwarding direction. This is called the Gray Zone Problem [24]. In our proposed Smart NExt Hop Selection Algorithm we choose the farthest possible node with the consideration of gray zone problem.…”

Section: Gray Zone Problemmentioning

confidence: 99%

“…Broadcast storm problem [34] may arise due to such phenomenon. Additionally Gray zone problem [24] attributes to most path-break up in reactive routing protocols.…”

Section: Reactive Routing Protocolsmentioning

confidence: 99%

“…But we believe, it is not suitable for pure ad hoc scenarios. Also Gytar does not solve gray zone problems [24].…”

Section: Position Based Routing Protocolsmentioning

confidence: 99%

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DDOR: Destination discovery oriented routing in highway/freeway VANETs+

Sahu

Sahoo

et al. 2010

Telecommun Syst

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The emerging adoption of wireless communications on surface transportation systems has generated extensive interest among researchers over the last several years. Innovative inter-vehicular communications and vehicle-to-infrastructure communications achieve road traffic safety, ecstatic driving and delightful travelling experiences. Multi-hop information dissemination in vehicular ad hoc networks is challenged by high mobility and frequent disconnections of wireless nodes. This paper presents a new routing scheme for Highway/Freeway VANETs, which consists of a unicast destination discovery process, a robust forward node selection mechanism and a positional hello mechanism. In this paper, no dedicated path is framed in order to prevent frequent path maintenance. In addition, the avoidance of flooding and location services substantially reduces the control overhead. Positional hello scheme ensures connectivity and diminishes control overhead concurrently. Simulation results signify the benefits of the proposed routing strategy (i.e. DDOR) has higher packet delivery ratio, Preliminary version was presented in Proceedings of IEEE APSCC 2008.

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Section: Gray Zone Problemmentioning

confidence: 99%

“…Broadcast storm problem [34] may arise due to such phenomenon. Additionally Gray zone problem [24] attributes to most path-break up in reactive routing protocols.…”

Section: Reactive Routing Protocolsmentioning

confidence: 99%

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DDOR: Destination discovery oriented routing in highway/freeway VANETs+

Sahu

Sahoo

et al. 2010

Telecommun Syst

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show abstract

“…CRP establishes a routing path and pre-selects the relay nodes. The CRP is based on the widely used ad-hoc on-demand distance vector (AODV) routing protocol [15], and may suffer from the gray zone problem [16,17], which arises from the different transmission rates for control and data frames in 802.11-based networks. An enhanced routing protocol is further proposed in Section 2.4 which uses SNR threshold to effectively combat the gray zone effect.…”

Section: System Modelmentioning

confidence: 99%

“…However, the CRP protocol still suffers from the well-known gray zone problem of AODV in an 802.11 network [16,17]. This phenomenon stems from the large difference in BER performance between MCSs used by the basic rate and data rate transmission.…”

Section: Enhanced Crpmentioning

confidence: 99%

Cooperative Protocols Design for Wireless Ad-hoc Networks with Multi-hop Routing

Lin¹,

Song²,

Wong³

2008

Proceedings of the Fifth International ICST Conference on Heterogeneous Networking for Quality Reliability Security and Robustn

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Wireless ad-hoc networks can experience significant performance degradation under fading channels. Diversity through space has been shown to be an effective way of combating wireless fading with the multiple-input-multiple-output (MIMO) technique by transmitting correlated information through multiple antennas. The virtual MIMO technique, which allows multiple wireless stations with single antenna to form a virtual transmission array, is shown to be a viable solution from several recent studies. In this paper, we propose a complete system framework for wireless ad-hoc networks utilizing two different cooperative relaying techniques at the physical layer: the repetition coding and the space-time coding. In the data link layer, two medium access control protocols are proposed to accommodate the corresponding physical layer cooperative diversity schemes. In the network layer, diversity-aware routing protocols are proposed to determine the routing path and the relaying topology. Simulations results show significant performance gains of the proposed cooperative relaying schemes.

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Cross-Layer Interaction in Wireless Ad Hoc Networks: A Practical Example

Gauthier¹,

Marot²,

Becker³

2007

Recent Advances in Modeling and Simulation Tools for Communication Networks and Services

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This paper presents the design and the performance evaluation of a joined process between the PHY (PHYsical) layer and routing layer in a multi-hop wireless ad hoc networks. This cross-layer interaction between the PHY and routing layers allows each node in an ad hoc network to evaluate the performance of each path in its routing table in terms of Bit Error Rate (BER) and to classify each path accordingly. Routing information from poor quality links are not forwarded leading to the selection of high quality links during the routing process. An implementation of our cross-layer algorithm based on Ad-hoc On-demand Distance Vector (AODV) is presented along with simulation results showing significant improvements in terms of additional throughput and lower BER. Furthermore, inherent of our mechanism's design, the network overhead introduced by routing protocols is reduced.

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The gray zone problem in IEEE 802.11b based ad hoc networks

Cited by 55 publications

References 2 publications

DDOR: Destination discovery oriented routing in highway/freeway VANETs+

DDOR: Destination discovery oriented routing in highway/freeway VANETs+

Cooperative Protocols Design for Wireless Ad-hoc Networks with Multi-hop Routing

Cross-Layer Interaction in Wireless Ad Hoc Networks: A Practical Example

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