812-HD-FDD 和TDD UE的VoLTE增强.docx
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1、HD-FDD和TDDUE的VOLTE增强half-duplexFDDUE的覆盖范围小于全双工UE的覆盖范围,为了最大化half-duplexFDD实现VoLTE覆盖,可以优化上下行资源利用率的机会,例如通过减少下行重复的技术、新的重复因子和调整的调度延迟。假设双向通信,DL和UL语音分组需要在同一时间窗口内传送。对于HD-FDD/TDDUE,这意味着空口时间预算将通过TDM在上下行数据以及控制/反馈传输之间共享。以EVS7.2kbps编解码器和AMR-WB6.6kbps为例,表1计算了传输时间为40ms、有无报头压缩的有效载荷和相应的TBS。本例的最大耦合损耗(MCL:maximumcoupl
2、ingloss)计算如表2所示,其中目标BLER设置为1%,用于研究具有一个HARQ传输的情况,即仅具有初始传输的情况。表1:TBS计算40ms,RTP级9E合,6个RB的PDSCH是否头压缩?PayloadRTPheaderPDCPRLCMACBRS+PHRPayload+HeadersTBSCodedbitsR是18*23*22*221039240814400.3000否18*260*22*22101304135228800.477840ms,RTP级聚合,6个RB的PDSCH是否头压缩?PayloadRTPheaderPDCPRLCMACBRS+PHRPayload+HeadersTBS
3、CodedbitsR是18*23*22*22164405048640.5370否18*260*22*22161352135234560.3981表2:MCL计算物理信道名称PUSCHPDSCH,1RxAnPDSCH,2Rx-Ans发送(0)最大TX功率(dBm)234646实际TX功率(dBm)2336.7936.79接收(2)热噪声密度(dBmHz)-174-174-174(3)接收机噪声系数(dB)599(5)占用的信道带宽(Hz)54000010800001080000(6)有效噪声功率=(2)+(3)+10log(5)(dBm)-111.68-104.67-104.67(7)要求的Sl
4、NR(dB)-6.103.60-3.20(8)接收器灵敏度=(6)+(dBm)-117.78-101.07-107.87(9)MCL基线=(l)-(8)(dB)140.78137.86144.66RL=32RL=4RL=4TBS=456TBS=408TBS=408按照MCL计算的相同步骤,表3和表5分别给出了单播PDSCH和PUSCH传输的各种TBS和RL的MCL。在表4中,还提供了带有2x2天线设置的PDSCH配置的链路级评估结果。表3:具有1x2天线配置的单播PDSCH的MCL(dB).BLER=I%有效负载(bit)6PRB的PDSCH,1x2天线配置RL2082563284085046
5、00712808936i134.56134.06132.96132.16131.06129.66128.76128.16127.162137.46136.86135.76135.26133.86133.26132.56132.16131.664140.46139.86138.36137.86137.06136.76135.56135.46134.768142.66142.36141.36140.46139.56139.26138.16138.26137.7616145.76144.76144.26143.36142.96142.36141.86141.16140.86BLER=I%有效负载(b
6、it)6PRBfiPDSCH,1x2天1建配置RL10321192135215441736180019282152279229842130.06129.36128.66127.66127.46127.36124.96124.56123.66122.664133.06132.46131.96130.86130.56130.26129.46129.06127.46127.368135.66135.16134.86134.26133.26133.26132.56132.36131.16130.4616138.66138.56137.56137.36136.16136.66135.76135.1613
7、4.26134.0632141.96141.76141.06140.46139.76140.06139.16138.66137.36137.36BLER=I%有效负载(bit)24PRBttPDSCH,1x2天线配置106413841736208829842139.16137.86137.16135.76134.664141.96140.96139.86139.06137.768144.46143.86142.76142.06140.6616147.16146.26145.36144.96143.6632149.96148.96148.46147.46146.76表1:单播PDSCH的MCL(
8、dB),具有1x2和2x2天线配置.BLER=I%有效负载(bit)6PRB的PDSCH,1x2天线Bd有效负载(bit)6PRB的PDSCH,2x2天线配置RL408135240813521132.16124.36138.96131.662135.26128.66141.86135.964137.86131.96144.66139.068140.46134.86147.26141.8616143.36137.56149.56144.46表5:6PRB的PUSCH的MCL(dB)BLER=I%Payload(bits)forPUSCHwith6PRBsRL2082563284085046007
9、128089362130.97130.77129.77128.67127.67127.17126.37125.97125.274134.07133.47132.27132.17130.87130.27129.67129.37128.578136.97136.17135.27134.87133.97133.27132.67131.97131.2716140.07139.27138.57137.57136.97136.67136.07135.37134.8732143.27142.57142.17141.37140.57139.77139.47138.77138.47BLER=I%Payload(
10、bits)forPUSCHwith6PRBsRL10321192135215441736180019282152279229842124.87122.77122.47121.77120.77120.77120.07119.87116.07114.974127.97126.47125.27125.17124.47124.07123.87123.37121.17120.578130.87129.17128.37128.47127.27127.67126.97126.27124.471243716134.17132.27131.47130.97130.37130.27129.97129.27127.
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