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Preemption and QoS management algorithms for coordinated and uncoordinated base stations

機譯:用于協(xié)調(diào)和非協(xié)調(diào)基站的搶占和Qos管理算法

摘要

This paper addresses the problem of resource allocation and qualityudof service (QoS) management in a downlink communication systemudwhere the users are allowed to be attached to and receive dataudfrom one or several cooperating base stations (BSs) under orthogonaludfrequency division multiple access (OFDMA). Under the assumptionudthat only information regarding the link path loss is availableudat each transmitter, the problem of power and bandwidth allocationudto minimize transmission power subject to minimum rate (i.e., QoS)udconstraints is written as a convex optimization problem. Consideringudthat the transmission power per BS is limited, the Lagrangeudmultipliers of the optimization problem are exploited either to ef-udficiently identify which are the candidates to be preempted wheneverudunaffordable power consumption arises, or to relax the targetudrate constraints for the ongoing connections. In the second case,udthe Lagrange multipliers are used in combination with the NewtonRaphsonudalgorithm to adjust the QoS of the users in the system accordingudto the available BS power.
機譯:本文解決了在下行通信系統(tǒng)中的資源分配和質(zhì)量 udof服務(wù)(QoS)管理的問題 ud,其中允許用戶在正交 udfrequency下附加到一個或幾個協(xié)作基站(BS)并從中接收數(shù)據(jù) ud劃分多址(OFDMA)。在假設(shè) ud關(guān)于每個發(fā)射機僅可獲得關(guān)于鏈路路徑損耗的信息 udad的情況下,將功率和帶寬分配的問題 ud以最小速率(即,QoS)最小化傳輸功率的問題 ud約束約束寫為凸優(yōu)化問題??紤]到每基站的傳輸功率受到限制,優(yōu)化問題的拉格朗日 ud乘數(shù)被用來有效地識別足夠的 ududfable功耗時優(yōu)先搶占的候選者,或放寬目標 udrate約束。進行中的連接。在第二種情況下,拉格朗日乘法器與NewtonRaphson udalgorithm結(jié)合使用,根據(jù)可用的BS功率來調(diào)整系統(tǒng)中用戶的QoS。

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