Abstract
As discussed in Chap. 2, the current WLANs experience bandwidth inefficiency when supporting voice traffic, leading to a very limited capacity to voice users. In this chapter, we aim at addressing this limitation. Our work is based on IEEE 802.11e since it is the most promising technology for QoS provisioning in WLANs. With minor modifications to IEEE 802.11e, we can increase the system capacity significantly for voice traffic, provide guaranteed QoS to voice users and, at the same time, provide data traffic a certain level of service share.
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Notes
- 1.
A busy-tone signal is a jamming signal which dose not carry any bit information. It is sent in the information channel, without incurring extra hardware cost.
- 2.
In this chapter, a voice session means a two-way voice call.
- 3.
Note that for the case of k contention window sizes, k-dimensional Markov chain is needed. When k is large, the computation complexity may be high. However, as shown in [42], our scheme does not require a large contention window sizes. A satisfactory performance can be achieved with three contention window sizes (i.e., CW min = 3 and CW max = 15).
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Wang, P., Zhuang, W. (2013). Voice Capacity Improvement over Infrastructure WLANs. 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_3
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DOI: https://doi.org/10.1007/978-1-4614-6602-4_3
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