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A Downlink Data Region Allocation Algorithm for IEEE 802.16e OFDMA
A. Bacioccola, C. Cicconetti, L. Lenzini , E. Mingozzi Information, Communications & Signal Processing, th 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 e 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 而ms是以time frame basis,去存取網路資源 而且mac frames可以被視為是一個二維陣列 這裡以minimum data transmission unit為一OFDMA的slot Minimum data transmission unit time frequency …
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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 所以data的傳送是在這二維陣列 而bs透過dlmap、ulmap來控制data region
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Introduction BS transmits eight slots of data to MS 2*4 3*3 4*2
1*8 2*4 One slot remains empty
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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 e with the OFDMA air interface Proposed a solution for data region allocation SDRA
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Thank you
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