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Dual Busy-Tone MAC for Wireless Ad Hoc Networks

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Book cover Distributed Medium Access Control in Wireless Networks

Part of the book series: SpringerBriefs in Computer Science ((BRIEFSCOMPUTER))

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Abstract

In the preceding chapters, a single-hop wireless network (i.e., WLAN) is considered. In this chapter, we consider a multi-hop wireless ad hoc network. As discussed in Chap. 2, unlike single-hop WLANs, the multi-hop wireless network presents more challenges to the QoS provisioning. The hidden terminals bring more collisions. The exposed terminals lead to inefficient channel utilization. The locations of the contending flows can greatly affect the channel access opportunity of each flow, resulting in serious unfairness and priority reversal problems. We propose an effective MAC scheme to address all these problems. Our proposed MAC scheme utilizes two narrow-band busy-tone channels and one information channel. Similar to all other busy-tone schemes, extra hardware cost is incurred to implement the busy-tone channels. However, as mentioned in [33], the wireless transceiver architecture proposed in [32] can help to set up the busy-tone channels with low hardware cost.

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Notes

  1. 1.

    All the nodes which are within the transmission range of a node (say node A) are one-hop neighbors of node A. All the nodes which are beyond the transmission range of node A but within two times the transmission range of node A are two-hop neighbors of node A. In a wireless network, the carrier sense range varies with the receiver’s sensitivity. The feasibility of such a setting method can be found in [100]. For presentation clarity, we assume that, when a node is receiving a frame, only its one-hop neighbours’ transmissions may corrupt its reception. In reality, a node’s interference range may be larger than its transmission range, so the nodes beyond one-hop of a receiver may still be able to corrupt the reception. In this case, our scheme can still work if we adjust the BTt channel’s carrier sense range to be the interference range plus the transmission range, and the BTr channel’s carrier sense range to be the interference range.

  2. 2.

    In this book, a voice-DATA frame means a DATA frame from a voice traffic source, while a data-DATA frame means a DATA frame from a data traffic source.

  3. 3.

    Here we omit the time index t for j 1 and j 2.

  4. 4.

    Each group represents a set of nodes, which are in the transmission range of each other and are contending with each other. The nodes in the same group have the same characteristics. The nodes in one group are beyond the transmission range of any node in other groups.

  5. 5.

    Typically the carries sense range is no less than the transmission range, so we do not consider the case that BTr channel’s carrier sense range is less than the transmission range.

References

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Authors and Affiliations

  1. Nanyang Technological University, Singapore, Singapore

    Ping Wang

  2. University of Waterloo, Waterloo, ON, Canada

    Weihua Zhuang

Authors
  1. Ping Wang
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  2. Weihua Zhuang
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Wang, P., Zhuang, W. (2013). Dual Busy-Tone MAC for Wireless Ad Hoc Networks. In: Distributed Medium Access Control in Wireless Networks. SpringerBriefs in Computer Science. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6602-4_5

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  • DOI: https://doi.org/10.1007/978-1-4614-6602-4_5

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4614-6601-7

  • Online ISBN: 978-1-4614-6602-4

  • eBook Packages: Computer ScienceComputer Science (R0)

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