一種用于IEEE 802.16無線城域網(wǎng)TDD模式中的帶寬調(diào)度方案
A Bandwidth Scheduling Architecture for IEEE 802.16 Wireless MAN in TDD Mode
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摘要: 該文提出了一種用于IEEE 802.16寬帶無線接入系統(tǒng)TDD模式下的公平而有效的帶寬分配調(diào)度體系。與該領(lǐng)域中傳統(tǒng)的固定帶寬分配方式相比，該文提出的調(diào)度體系結(jié)構(gòu)綜合考慮了上下行鏈路不同業(yè)務(wù)帶寬需求并進(jìn)行動(dòng)態(tài)帶寬分配。該文提出一種新的虧空公平優(yōu)先級隊(duì)列(DFPQ)算法來調(diào)度不同優(yōu)先級的業(yè)務(wù)流，可以為系統(tǒng)提供更好的公平性。仿真結(jié)果顯示該文提出的調(diào)度體系結(jié)構(gòu)能夠很好地滿足所有類型業(yè)務(wù)的服務(wù)質(zhì)量(QoS)需求，并提供較好的公平性。Abstract: A fair and efficient bandwidth allocation scheduling architecture for IEEE 802.16 Broadband Wireless Access (BWA) systems in TDD mode is proposed. In this area, comparing with the traditional fixed bandwidth allocation, the proposed scheduling architecture allocates uplink and downlink bandwidth simultaneously and dynamically. A Deficit Fair Priority Queue (DFDQ) algorithm is proposed to schedule different service flow, which provides more fairness to the system. The simulation results show the proposed architecture can meet the QoS requirement and fairness for all types of traffic.
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