功率控制分析--外文翻译

20142014 届届 本本 科科 毕毕 业业 设设 计 外文计 外文 翻翻 译 译 学学 院 院 专专 业 业 姓姓 名 名 学学 号 号 指导教师 指导教师 完成时间 完成时间 二二 一四年三月一四年三月 Power control Downlink power control determines the energy per resource element EPRE The term resource element energy denotes the energy prior to CP insertion The term resource element energy also denotes the average energy taken over all constellation points for the modulation scheme applied Uplink power control determines the average power over a SC FDMA symbol in which the physical channel is transmitted Physical uplink shared channel UE behaviour The setting of the UE Transmit power for the physical uplink shared channel PUSCH PUSCH P transmission in subframe i is defined by log10 min TFO PUSCHPUSCH10CMAXPUSCH ifiPLjjPiMPiP dBm where is the configured UE transmitted power defined in 6 CMAX P is the bandwidth of the PUSCH resource assignment expressed in number of PUSCH iM resource blocks valid for subframe i is a parameter composed of the sum of a cell specific nominal component O PUSCH jP provided from higher layers for j 0 and 1 and a UE specific PUSCHO NOMINAL jP component provided by higher layers for j 0 and 1 For PUSCH O UE PUSCH jP re transmissions corresponding to a semi persistent grant then j 0 for PUSCH re transmissions corresponding to a dynamic scheduled grant then j 1 and for PUSCH re transmissions corresponding to the random access response grant then j 2 and where the 0 2 O UE PUSCH P 3 O PREPUSCHO NOMINAL 2 MsgPREAMBLE PP parameter PREAMBLE INITIAL RECEIVED TARGET POWER 8 and O PRE P are signalled from higher layers 3 MsgPREAMBLE For j 0 or 1 is a 3 bit cell specific parameter provided by 1 9 0 8 0 7 0 6 0 5 0 4 0 0 higher layers For j 2 1 j PL is the downlink pathloss estimate calculated in the UE in dB and PL referenceSignalPower higher layer filtered RSRP where referenceSignalPower is provided by higher layers and RSRP is defined in 5 and the higher layer filter configuration is defined in 11 for and 0 for where is given by TF10 10log 21 S MPR KPUSCH offset i 25 1 S K0 S K S K the UE specific parameter deltaMCS Enabled provided by higher layers ofor control data sent via PUSCH without UL SCH data and CQIRE MPRON for other cases 1 0 C rRE r KN where is the number of code blocks is the size for code block C r Kr is the number of CQI bits including CRC bits and is the CQI O RE N number of resource elements determined as where and initial PUSCH symb NMN initialPUSCH scRE C r K initialPUSCH sc M are defined in 4 initial PUSCH symb N o for control data sent via PUSCH without UL SCH data and for PUSCHCQI offsetoffset 1 other cases is a UE specific correction value also referred to as a TPC command and is included PUSCH in PDCCH with DCI format 0 or jointly coded with other TPC commands in PDCCH with DCI format 3 3A whose CRC parity bits are scrambled with TPC PUSCH RNTI The current PUSCH power control adjustment state is given by which is defined by if o if accumulation is enabled based on the UE 1 PUSCHPUSCH Kiifif specific parameter Accumulation enabled provided by higher layers or if the TPC command is included in a PDCCH with DCI format 0 where the CRC is PUSCH scrambled by the Temporary C RNTI where was signalled on PDCCH with DCI format 0 or PUSCHPUSCH Ki 3 3A on subframe and where is the first value after reset PUSCH Ki 0 f of accumulation The value of is PUSCH K For FDD 4 PUSCH K For TDD UL DL configurations 1 6 is given in Table PUSCH K 1 1 1 For TDD UL DL configuration 0 oIf the PUSCH transmission in subframe 2 or 7 is scheduled with a PDCCH of DCI format 0 in which the LSB of the UL index is set to 1 7 PUSCH K oFor all other PUSCH transmissions is given in PUSCH K Table 1 1 1 The UE attempts to decode a PDCCH of DCI format 0 with the UE s C RNTI or SPS C RNTI and a PDCCH of DCI format 3 3A with this UE s TPC PUSCH RNTI in every subframe except when in DRX If DCI format 0 and DCI format 3 3A are both detected in the same subframe then the UE shall use the provided in DCI format 0 PUSCH dB for a subframe where no TPC command is decoded or where 0 PUSCH DRX occurs or i is not an uplink subframe in TDD The dB accumulated values signalled on PDCCH with DCI format 0 PUSCH are given in Table 1 1 2 If the PDCCH with DCI format 0 is validated as a SPS activation or release PDCCH then is 0dB PUSCH The dB accumulated values signalled on PDCCH with DCI format PUSCH 3 3A are one of SET1 given in Table1 1 2 or SET2 given in Table1 1 3 as determined by the parameter TPC Index provided by higher layers If UE has reached maximum power positive TPC commands shall not be accumulated If UE has reached minimum power negative TPC commands shall not be accumulated UE shall reset accumulation when value is changed by higher layers O UE PUSCH P when the UE receives random access response message oif accumulation is not enabled based on the UE specific PUSCHPUSCH Kiif parameter Accumulation enabled provided by higher layers where was signalled on PDCCH with DCI format 0 on PUSCHPUSCH Ki subframe PUSCH Ki The value of is PUSCH K For FDD 4 PUSCH K For TDD UL DL configurations 1 6 is given in Table PUSCH K 1 1 1 For TDD UL DL configuration 0 oIf the PUSCH transmission in subframe 2 or 7 is scheduled with a PDCCHof DCI format 0 in which the LSB of the UL index is set to 1 7 PUSCH K oFor all other PUSCH transmissions is given in PUSCH K Table 1 1 1 The dB absolute values signalled on PDCCH with DCI format 0 are PUSCH given in Table 1 1 2 If the PDCCH with DCI format 0 is validated as a SPS activation or release PDCCH then is 0dB PUSCH for a subframe where no PDCCH with DCI format 0 is 1 ifif decoded or where DRX occurs or i is not an uplink subframe in TDD oFor both types of accumulation or current absolute the first value is set as f follows If value is changed by higher layers O UE PUSCH P 00f Else 2 0 msgrampup Pf owhere is the TPC command indicated in the 2msg random access response see Section 6 2 and o is provided by higher layers and corresponds to rampup P the total power ramp up from the first to the last preamble Table 1 1 1 for TDD configuration 0 6 PUSCH K subframe number iTDD UL DL Configuration 0123456789 0 674 674 1 64 64 2 4 4 3 444 4 44 5 4 6 775 77 Table 1 1 2 Mapping of TPC Command Field in DCI format 0 3 to absolute and accumulated values PUSCH TPC Command Field in DCI format 0 3 Accumulated dB PUSCH Absolute dB PUSCH only DCI format 0 0 1 4 10 1 211 334 Table 1 1 3 Mapping of TPC Command Field in DCI format 3A to accumulated PUSCH values TPC Command Field in DCI format 3A Accumulated dB PUSCH 0 1 11 Power headroom The UE power headroom valid for subframe i is defined by PH dB CMAX10PUSCHO PUSCHTF 10log PHiPMiPjjPLif i where PL and are defined in section 1 1 1 CMAX P PUSCH iM O PUSCH jP j TF i if The power headroom shall be rounded to the closest value in the range 40 23 dB with steps of 1 dB and is delivered by the physical layer to higher layers 功率控制 下行功率控制决定单位资源元素上的功率值 可见是在频域进行功率分配再进行时域加CP 同时功率分 配是进行在子载波上 是对各个复信号上的幅度的调整 上行功率控制决定所传输的DFT SOFDM符号上 的功率值 上行物理共享信道 UE行为 每个子帧i的物理上行信道PUSCH的发送功率设定计算如下 PUSCH P log10 min TFO PUSCHPUSCH10CMAXPUSCH ifiPLjjPiMPiP dBm 其中 UE最大发送功率 23dBm左右 CMAX P 在子帧i中PUSCH所占的带宽 单位是资源块RB PUSCH iM 高层决定j的取值 j 0时 对应半 O PUSCH jP O PUSCH jP PUSCHO NOMINAL jP O UE PUSCH jP 静态授权的PUSCH传输或重传 j 1时 对应动态授权的PUSCH传输或重传 j 2时 对应接入响应授权店 PUSCH传输或重传 此时 3 O PREPUSCHO NOMINAL 2 MsgPREAMBLE PP 0 2 O UE PUSCH P 和 由高层信令配置 当j 0 或1时 其中 O PRE P 3 MsgPREAMBLE 一个3bit高层配置的小区级参数 当j 2时 部分功率补 1 9 0 8 0 7 0 6 0 5 0 4 0 0 1 j 偿因子 PL 下行路损估计值 通过下式计算出 PL referenceSignalPower higher layer filtered RSRP 其中 referenceSignalPower 由高层配置 RSRP 在参考文档 5 中定义 而higher layer filter在 11 中配置 公式如下 其中或者 其配置情况由 TF i TF10 10log 21 S MPR KPUSCH offset i 25 1 S K0 S K 高层配置用户级参数deltaMCS Enabled决定 O 当PUSCH中只有控制数据时 其它情况等于等于码块数 等于第 CQIRE MPRON 1 0 C rRE r KN r K 个码块的大小 等于加上CRC位的CQI比特数 r CQI O 等于资源元素由公式得出 其中 和 RE N initial PUSCH symb NMN initialPUSCH scRE C r K initialPUSCH sc M 在参考文档 4 给出 并且 和在PUSCH初始化的时 initial PUSCH symb NC r K initialPUSCH sc M 候获得 O当PUSCH中只有控制数据时 其它情况等于1 PUSCHCQI offsetoffset 用户级参数 对应于DCI0和联合编码DCI3 3A的PDCCHTPC命令 DCI0使用C RNTI加扰CRC DCI3 3A PUSCH 使用TPC PUSCH RNTI加扰CRC 当前子帧PUSCH的功率调整值等于 i 定义如下 o当累积修正Accumulation enabled 使能时 或者在DCI0调整情况下 TPC PUSCH RNTI其中是在DCI0或DCI3 3A传下来的信令TPC 来 1 PUSCHPUSCH Kiifif 自对应PDCCH的子帧为 而且是最初的累积值 PUSCH Ki 0 f 的值定义如下 在FDD情况下 4 PUSCH K PUSCH K 在TDD UL DL配比 1 6时 由表Table 1 1 1给出 PUSCH K 在TDD UL DL 配比 0时 O如果子帧2和7的PUSCH是PDCCH的DCI0调度的 且DCI中的UL index域 高位设为1时 7 PUSCH K O 其它PUSCH传输情况时 由表1 1 1设置 PUSCH K 除非处在DRX状态 UE会不断地在每个子帧检测DCI0和DCI3 3A分别使用C RNTI和TPC PUSCH RNTI 如果DCI0和DCI3 3A都被检测成功 UE会选择DCI0的TPC用作 PUSCH 如果没有TPC命名下发或者处在DRX状态下以及没有上行子帧时 0 PUSCH 的取值单位为dB 其和DCI0中TPC取值对应关系见表1 1 2 PUSCH 的取值单位为dB 其和DCI3 3A中TPC取值对应关系见表1 1 2或者表1 1 3 PUSCH 3 具体用户的TPC由高层配置的TPC Index决定 如果UE到达最大发送功率时 正的功率修正值TPC不再有效 如果UE到达最小发送功率时 负的功率修正值TPC不再有效 UE应该在以下情况复位累加值 当绝对功率修正值TPC命令收到时 当收到信令时 O UE PUSCH P 当UE收到随机接入响应消息时 o当累积修正Accumulation enabled 不使能时 PUSCHPUSCH Kiif 其中由上PDCCH传送下来DCI决定 PUSCHPUSCH Ki PUSCH Ki 的值等于 在 FDD情况下 4 PUSCH K PUSCH K 在 TDD UL DL配