a downlink data region allocation algorithm for ieee 802.16e ofdma a. bacioccola, c. cicconetti, l....
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A Downlink Data Region Allocation Algorithmfor IEEE 802.16e OFDMA
A. Bacioccola, C. Cicconetti, L. Lenzini, E. Mingozzi
Information, Communications & Signal Processing, 2007 6th International Conference
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Outline
Introduction Sample data region allocation algorithm
(SDRA) Performance analysis Conclusion
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Introduction
IEEE 802.16e extends IEEE 802.16-2004 Support the mobility of users Provide QoS guarantees
OFDMA is the target air interface for mobile BWA with IEEE 802.16e mobile users with an improved resilience
multi-path fading in non-line-of-sight environments
wireless multiple access methods
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Introduction
An IEEE 802.16e cell consists of Mobile Stations (MSs) Base Station (BS)
Access to the medium is scheduled on a time frame basis.
MAC frames extend over two dimensions Time Frequency
time
frequency ……
… …
…
…
…Minimum data transmission unit
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Introduction
Data packets are conveyed into bi-dimensional data regions rectangles of slots within the frame
DL-MAP UL-MAP
The only constraint all data regions without overlapping
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Introduction
One slot remains empty
BS transmits eight slots of data to MS
1*8
2*4
4*23*3
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SDRA
…
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Performance analysis
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Performance analysis
…
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Performance analysis
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Conclusion
In this paper, they have addressed the data region allocation problem in IEEE 802.16e with the OFDMA air interface
Proposed a solution for data region allocation SDRA
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Thank you