A Downlink Data Region Allocation Algorithm for IEEE e OFDMA

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Presentation transcript:

A Downlink Data Region Allocation Algorithm for IEEE 802.16e OFDMA A. Bacioccola, C. Cicconetti, L. Lenzini , E. Mingozzi Information, Communications & Signal Processing, 2007 6th International Conference

Outline Introduction Sample data region allocation algorithm (SDRA) Performance analysis Conclusion

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

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 …

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

Introduction BS transmits eight slots of data to MS 2*4 3*3 4*2 1*8 2*4 One slot remains empty

SDRA …

Performance analysis

Performance analysis …

Performance analysis

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

Thank you