功率控制分析外文翻译.doc

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1、Power controlDownlink 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. Up

2、link power control determines the average power over a SC-FDMA symbol in which the physical channel is transmitted.Physical uplink shared channel-UE behaviourThe setting of the UE Transmit power for the physical uplink shared channel (PUSCH) transmission in subframe i is defined by dBmwhere, is the

3、configured UE transmitted power defined in 6 is the bandwidth of the PUSCH resource assignment e*pressed in number of resource blocks valid for subframe i. is a parameter composed of the sum of a cell specific nominal component provided from higher layers for j=0 and 1 and a UE specific component pr

4、ovided by higher layers for j=0 and 1. For PUSCH (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 , whe

5、re the parameter PREAMBLE_INITIAL_RECEIVED_TARGET_POWER 8 () and are signalled from higher layers. For j =0 or 1, is a 3-bit cell specific parameter provided by higher layers. For j=2, PL is the downlink pathloss estimate calculated in the UE in dB and PL = referenceSignalPower higher layer filtered

6、 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 the UE specific parameter deltaMCS-Enabled provided by higher layerso for control data sent via PUSCH without UL-SCH data

7、 and for other cases. where is the number of code blocks, is the size for code block , is the number of CQI bits including CRC bits and is the number of resource elements determined as, where , , andare defined in 4.o for control data sent via PUSCH without UL-SCH data and for other cases. is a UE s

8、pecific correction value, also referred to as a TPC command and is included 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

9、 defined by:o if accumulation is enabled based on the UE-specific parameter Accumulation-enabled provided by higher layers or if the TPC commandis included in a PDCCH with DCI format 0 where the CRC is scrambled by the Temporary C-RNTI where wassignalled on PDCCH with DCI format 0 or 3/3A on subfram

10、e , and where is the first value after reset of accumulation. The value of is For FDD,= 4 For TDD UL/DL configurations 1-6, is given in Table 1.1-1 For TDD UL/DL configuration 0o If the PUSCH transmission in subframe 2 or 7 isscheduledwith a PDCCH of DCI format 0 in which the LSB of the UL inde*is s

11、et to 1, = 7o For all other PUSCH transmissions, is given in Table 1.1-1. The UE attempts to decode a PDCCH of DCI format 0 with the UEs C-RNTI or SPS C-RNTI and a PDCCH of DCI format 3/3A with this UEs TPC-PUSCH-RNTI in every subframe e*cept when in DR* If DCI format 0 and DCI format 3/3A are both

12、detected in the same subframe, then the UE shall use the provided in DCI format 0. dB for a subframe where no TPC command is decoded or where DR* occurs ori is not an uplink subframe in TDD. The dB accumulated values signalled on PDCCH with DCI format 0 are given in Table 1.1-2. If the PDCCH with DC

13、I format 0 is validated as a SPS activation or release PDCCH, then is 0dB. The dB accumulated values signalled on PDCCH with DCI format 3/3A are one of SET1 given in Table1.1-2 or SET2 given in Table1.1-3 as determined by the parameter TPC-Inde* provided by higher layers. If UE has reached ma*imum p

14、ower, 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 when the UE receives random access response messageo if accumulation is not enabled based on the UE-

15、specific parameter Accumulation-enabled provided by higher layers where was signalled on PDCCH with DCI format 0 on subframe The value of is For FDD,= 4 For TDD UL/DL configurations 1-6, is given in Table 1.1-1 For TDD UL/DL configuration 0o If the PUSCH transmission in subframe 2 or 7 isscheduledwi

16、th a PDCCHof DCI format 0 in which the LSB of the UL inde*is set to 1, = 7o For all other PUSCH transmissions, is given in Table 1.1-1. The dB absolute values signalled on PDCCH with DCI format 0 are given in Table 1.1-2. If the PDCCH with DCI format 0 is validated as a SPS activation or release PDC

17、CH, then is 0dB. for a subframe where no PDCCH with DCI format 0 is decoded or where DR* occurs ori is not an uplink subframe in TDD.o For both types of (accumulation or current absolute) the first value is set as follows: If value is changed by higher layers, Elseo where is the TPC command indicate

18、d in the random access response, see Section 6.2, and o is provided by higher layers and corresponds to the total power ramp-up from the first to the last preambleTable 1.1-1for TDD configuration 0-6TDD UL/DLConfigurationsubframe number i01234567890-674-6741-64-64-2-4-4-3-444-4-44-5-4-6-775-77-Table

19、 1.1-2: Mapping of TPC Command Field in DCI format 0/3 to absolute and accumulated values.TPC Command Field inDCI format 0/3Accumulated dBAbsolute dB only DCI format 00-1-410-1211334Table 1.1-3: Mapping of TPC Command Field in DCI format 3A to accumulated values.TPC Command Field inDCI format 3AAccu

20、mulated dB0-111Power headroomThe UE power headroom valid for subframe i is defined by dBwhere, , , , , PL, and are defined in section 1.1.1. 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

21、控制下行功率控制决定单位资源元素上的功率值，可见是在频域进展功率分配再进展时域加CP，同时功率分配是进展在子载波上，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：dBm其中：UE最大发送功率，23dBm左右。：在子帧i中PUSCH所占的带宽，单位是资源块RB。：=+高层决定j的取值，j=0时，对应半静态授权的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，和由高层信令配置；当j =0 或1时,

22、一个3bit高层配置的小区级参数； 当j=2时,；局部功率补偿因子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。D：公式如下，。其中或者，其配置情况由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, 等于第个码块的大小，等于加上CRC位的CQI比特数，等于资源元素由公式得出。其中, 和在参考

23、文档4给出，并且 , 和在PUSCH初始化的时候获得。O当PUSCH中只有控制数据时；其它情况等于1 。: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，来自对应PDCCH的子帧为, 而且是最初的累积值。的值定义如下: 在FDD情况下,= 4在TDD UL/

24、DL配比 1-6时, 由表Table 1.1-1给出。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 inde*域高位设为1时, = 7。O其它PUSCH传输情况时,由表1.1-1设置。除非处在DR*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。如果没有TPC命名下发或者处在DR*状态下以及没有上行子帧时，的取值单位为dB，其和DCI0中TPC取值对应关系见表1.1-2。的取值单位为dB，其和DCI3

25、/3A中TPC取值对应关系见表1.1-2或者表1.1-33，具体用户的TPC由高层配置的TPC-Inde*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；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，其中由上PDCCH传送下来DCI决定的值等于：在 FDD情况下,= 4在 TDD UL/DL配比1-6时,由表1.1-1决定。在TDD UL/DL配比0o如果子帧2和7的PUSCH是PDCCH的DCI

26、0调度的，且DCI0中的UL inde*域高位设为1时, = 7。o其它PUSCH传输情况时,由表1.1-1设置。d的取值单位为dB，其和DCI0中TPC取值对应关系见表1.1-2。当子帧DCI0没有检测到、处在DR*状态以及TDD制式下无上行子帧时：。o在累积修正和绝对值修正情况下，都须满足下面设定：如果收到高层命令，否则o其中是随机接入响应专有的TPC命令。来自高层，对应总功率放大围，从第一个preamble到最后一个preamble完毕。Table 1.1-1for TDD configuration 0-6TDD UL/DLConfiguratiosubframe number i01

27、234567890-674-6741-64-64-2-4-4-3-444-4-44-5-4-6-775-77-Table 1.1-2: Mapping of TPC Command Field in DCI format 0/3 to absolute and accumulatedvalues.TPC CommandField inDCI format 0/3AccumulatedddBAbsolute dBonly DCI format 00-1410-1211334Table1.1-3: Mapping of TPC Command Field in DCI format 3A to values.TPC Command Field inDCI format 3Ad dB0-111功率池UE功率池 PH 定义如下：其中, , , , PL,and如1.1.1定义。功率池应该在以下这个围之40; -23 dB，单位步长dB，由物理层报给高层。