CN104918312B

CN104918312B - For controlling the method and device thereof of signal transmitting power

Info

Publication number: CN104918312B
Application number: CN201510391738.XA
Authority: CN
Inventors: 徐东延; 金沂濬; 安俊基; 金民奎; 李正薰; 李大远; 梁锡喆
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2009-01-29
Filing date: 2010-01-28
Publication date: 2019-08-27
Anticipated expiration: 2030-01-28
Also published as: JP2012516607A; JP5302417B2; CN102301801B; JP5486099B2; JP2013093910A; CN102301801A; CN104918312A

Abstract

For controlling the method and device thereof of signal transmitting power.The present invention relates to wireless communication systems.More specifically, the present invention relates to the signaling methods that terminal in a wireless communication system sends signal, it the described method comprises the following steps: checking maximum maximum transmission power (P_UE_MAX) for sending power (P_CC_MAX) and the terminal of each component carrier of multiple component carriers；Calculate the transmission power for each channel to send simultaneously to base station by one or more component carriers；The transmission power of separately adjustable each channel, to be no more than maximum transmission power (P_CC_MAX) and maximum transmission power (P_UE_MAX)；And multiple channels by having had adjusted transmission power send signal to base station.

Description

For controlling the method and device thereof of signal transmitting power

The application is that application No. is the application for a patent for invention of 201080005813.X (international application no: PCT/ for original bill KR2010/000510, the applying date: on January 28th, 2010, denomination of invention: for controlling the method and its dress of signal transmitting power Set) divisional application.

Technical field

The present invention relates to wireless communication systems, and more specifically, the invention relates to using for controlling the side of uplink transmission power Method and device.

Background technique

Wireless communication system is widely used, to provide various types of communication services, such as voice or data.In general, Wireless communication system is can to support to communicate with multi-user by shared free system resources (bandwidth sends power etc.) Multi-address system.The example of multi-address system includes CDMA (CDMA) system, frequency division multiple access (FDMA) system, time division multiple acess (TDMA) system, orthogonal frequency division multiple access (OFDMA) system, single-carrier frequency division multiple access (SC-FDMA) system, multi-carrier frequency division multiple access (MC-FDMA) system etc..

Summary of the invention

Technical problem

Transmission is efficiently controlled when it is an object of the present invention to provide for sending multiple signals in a wireless communication system The method and apparatus of power.

The transmission of signal when it is a further object to provide for sending multiple signals in a wireless communication system The method and apparatus that efficiently control sends power when the sum of power is more than maximum transmission power.

The technical problem to be solved in the present invention is not limited to above-mentioned technical problem, and those skilled in the art are according to following Description is clearly understood that others not mentioned technical problem above.

Technical solution

In one aspect of the invention, a kind of method for sending signal in a wireless communication system includes following step It is rapid: independently to determine the transmission power of the first channel and second channel；If the sum of transmission power of the first and second channels is super Maximum transmission power has been crossed, then has considered channel priority, has reduced at least one of transmission power of the first and second channels hair Send power；And signal is sent to base station simultaneously by the first and second channels.

In another aspect of the present invention, user equipment (UE) includes radio frequency (RF) unit, the radio frequency unit be used for Base station (BS) sends wireless signal and receives wireless signal from base station (BS)；Memory, the memory are sent for storing to BS Information, from the received information of BS and UE operation need parameter；And processor, the processor are connected to RF unit and deposit Reservoir, and be configured to control RF unit and memory, to operate UE, wherein processor is independently determined the first channel and the The transmission power of two channels；If the sum of transmission power of the first and second channels has been more than maximum transmission power, consider to believe Road priority reduces at least one of transmission power of the first and second channels and sends power；And pass through first and second Channel sends signal to base station simultaneously.

Each channel in first and second channels may include one or more single-carrier frequency division multiple access (SC-FDMA) Symbol.Simultaneously, it may be considered that at least one of channel type or channel information determine channel priority.Each channel can be with Including appointing in Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH) or value detects reference signal (SRS) It anticipates one kind.

If the first channel and second channel are all PUSCH, it is contemplated that sending format, re-transmission/non-re-transmission or re-transmission Number determines channel priority.If reducing the transmission power of PUSCH, considers reduced quantity of power, can will be applied to The modulation of the PUSCH and encoding scheme (MCS) control are low value.If the first channel is the PUCCH for sending ACK, and the second letter Road is PUSCH, then can distribute high channel priority to PUSCH.

In another aspect of the present invention, for sending signal at user equipment (UE) in a kind of wireless communication system Method, method includes the following steps: confirming that the maximum of each component carrier in multiple component carriers sends power (P_CC_ MAX) and the maximum of the UE sends power (P_UE_MAX)；Calculating is scheduled as through one or more component carriers simultaneously The respective transmission power of multiple channels sent to base station (BS)；It is independently adjusted the transmission power of the multiple channel, To be no more than the P_CC_MAX and P_UE_MAX；And by having had adjusted the multiple letter for sending power Road sends signal to the BS.

In another aspect of the present invention, user equipment (UE) includes radio frequency (RF) unit, the radio frequency unit be used for Base station (BS) sends wireless signal and receives wireless signal from base station (BS)；Memory, the memory is for storing to the BS The information of transmission, to parameter needed for the received information of the BS and the operation UE；And processor, the processor It is connected to the RF unit and the memory, and is configured to control the RF unit and the memory, to operate It states UE, wherein the processor: confirming that the maximum of each component carrier in multiple component carriers sends power (P_CC_MAX) Maximum with the UE sends power (P_UE_MAX)；Calculating is scheduled as through one or more component carriers simultaneously to base Stand (BS) transmission the respective transmission power of multiple channels；It is independently adjusted the transmission power of the multiple channel, with not More than the P_CC_MAX and the P_UE_MAX；And by had adjusted it is described send power the multiple channel to The BS sends signal.

Information for the information of the P_CC_MAX to be arranged and for the P_UE_MAX to be arranged can be disappeared by broadcast Breath or wireless heterogeneous networks (RRC) message are sent with signal.

The adjusting of the transmission power of the multiple channel may include the transmission power for independently reducing each channel, make It obtains the sum of transmission power of the multiple channel and is no more than the P_UE_MAX；And the transmission power for reducing each channel it Afterwards, the transmission power of the respective channel of each component carrier is independently reduced, so that the sum of the transmission power of the respective channel No more than corresponding P_CC_MAX.In this case, at least part of the power reduced from the respective channel is for increasing The transmission power of other big component carriers.

The adjusting of the transmission power of the multiple channel may include independently reduce each component carrier corresponding The transmission power of channel, so that the sum of transmission power of the respective channel is no more than corresponding P_CC_MAX；And it is reducing After the transmission power of each channel, the independent transmission power for reducing each channel, so that the sum of the transmission power of the multiple channel No more than the P_UE_MAX.

The adjusting of the transmission power of the multiple channel may include that attenuation coefficient is applied independently for each channel.

Each channel in the channel may include one or more single-carrier frequency division multiple access (SC-FDMA) symbol. In this case, each channel in the channel may include Physical Uplink Shared Channel (PUSCH), physical uplink control letter Any one in road (PUCCH) or value detects reference signal (SRS).

In another aspect of the present invention, a kind of in a wireless communication system for sending signal at user equipment (UE) Method the following steps are included: calculate more antennas in each antenna transmission power；If the calculated transmission power of institute It has been more than that the maximum of respective antenna sends power, then has calculated and send power attenuation ratio；Than in most by the transmission power attenuation Big attenuation ratio is equally applicable to the more antennas；And signal is sent to base station (BS) by the more antennas.

Technical effect

According to an illustrative embodiment of the invention, it can efficiently be controlled when sending multiple signals in a wireless communication system System sends power.Moreover, can efficiently control transmission power when the sum of transmission power of signal has been more than maximum transmission power.

Detailed description of the invention

Attached drawing is included to provide a further understanding of the present invention, is incorporated into and constitutes one of the application Point, accompanying drawing shows embodiment of the present invention, and is used to explain the principle of the present invention together with specification.In attached drawing:

Fig. 1 shows the network structure of evolved universal mobile communication system (E-UMTS)；

Fig. 2 shows the knots of the Radio interface protocols between UE and E-UTRAN based on 3GPP wireless access network standard Structure；

Fig. 3 shows the block diagram of the transmitters and receivers for OFDMA and SC-FDMA；

Fig. 4 shows the structure of radio frames used in LTE system；

Fig. 5 shows the example that communication is executed in simple component carrier environment；

Fig. 6 A shows the structure of UL subframe used in LTE system；

Fig. 6 B shows the structure of UL control channel used in LTE system；

Fig. 7 shows the example that communication is executed in multiple component carriers environment；

Fig. 8 shows the exemplary transmission power control of embodiment according to the present invention；

Fig. 9 shows the example of the multiple signals of transmission of embodiment according to the present invention；

Figure 10 is shown when limiting maximum transmission power as unit of one or more component carriers according to the present invention The control of embodiment sends the example of power；

Figure 11 is shown when limiting maximum transmission power as unit of one or more component carriers according to the present invention The control of embodiment sends another example of power；And

Figure 12 shows the base station that can be applied to embodiments of the present invention and user equipment.

Specific embodiment

Can by referring to accompanying drawing and the embodiment of the present invention that describes understands construction of the invention, operation and other are special Sign.Here, embodiments of the present invention can be used for various wireless access technologys, such as CDMA, FDMA, TDMA, OFDMA, SC- FDMA and MC-FDMA.It can use universal terrestrial radio such as and access (UTRA, Universal Terrestrial Radio Access) or CDMA200 realizes CDMA.It can use such as global system for mobile communications (GSM, Global System for Mobile communication)/General Packet Radio Service (GPRS, General Packet Radio Service)/GSM The wireless technology of evolution enhanced data-rates (EDGE, Enhanced Data Rates for GSM Evolution) is realized TDMA.It can use such as IEEE802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE802.20 and E-UTRA (evolution UTRA wireless technology) realizes OFDMA.UTRA is a part of Universal Mobile Communication System (UMTS).Third generation affiliate Plan (3GPP, 3^rdGeneration Partnership Project) long term evolution (LTE) is evolution UMTS (E-UMTS) A part uses E-UTRA.LTE-A (advanced) is the evolution version of 3GPP LTE.

Following implementation of the invention mainly describes the example of the technical characteristic of the invention applied to 3GPP system.But It is that this is only exemplary.Therefore, the present invention is not limited to embodiments of the present invention described herein.

Fig. 1 shows the network structure of E-UMTS.E-UMTS is also known as LTE system.In order to understand UMTS and E-UMTS Technical specification details, respectively refer to " 3^rdGeneration Partnership Project；Technical Specification Group Radio Access Network (third generation partnership project；Technical specification group wirelessly connects Enter network) " the 7th edition and the 8th edition.

Referring to Fig.1, E-UMTS include user equipment (UE, User Equipment) 120, e node B (or eNB) 110a and 110b and access gateway (AG, Access Gateway), access gateway are located at one end of network (E-UTRAN) and connection To external network.E node B can send multiple data flows for broadcast service, multicast service and/or unicast services simultaneously. Each e node B may exist one or more cells.Cell is arranged to using 1.25MHz, 2.5MHz, 5MHz, 10MHz With a bandwidth in 20MHz bandwidth.Different cells can be set to provide different bandwidth.E node B is directed to multiple UE Control data transmission and reception.E node B sends downlink (DL, DownLink) scheduling information for DL data, to inform phase Answer UE to send time domain/frequency domains of data, coding, data size and with hybrid automatic repeat-request (HARQ, Hybrid Automatic Repeat and reQuest) related information.In addition, e node B for UL data send uplink (UL, UpLink) scheduling information, to notify corresponding UE that can use time domain/frequency domain, coding, data size and information related with HARQ.Core Heart network (CN, Core Network) may include AG, for network node of user's registration of UE etc..AG is based on tracking area The mobility of (TA, Tracking Area) management UE a, wherein TA includes multiple cells.

Fig. 2 shows the controls of the Radio interface protocols between based on 3GPP wireless access network standard, UE and E-UTRAN The structure in face processed and user face.Control plane is referred to for sending in UE and network for managing the road of the control message of calling Diameter.User face refers to the path for being sent in the data generated in application layer (e.g., voice data or the Internet packets data).

Physics (PHY) layer (it is first layer) provides information transmission service to upper layer using physical channel.PHY layer passes through biography Defeated channel is connected to media access control (MAC, the Medium Access Control) layer on upper layer.By transmission channel in MAC Data are transmitted between layer and PHY layer.Also transmitted between the physical layer of sending side and the physical layer of receiving side by physical channel Data.Time and frequency are used as radio resource by physical channel.Specifically, physics letter is modulated using OFDMA scheme in DL Road, and in UL using SC-FDMA scheme come modulation physical channel.

The MAC layer of the second layer passes through wireless spread-spectrum technology (RLC, Radio Link Control) of the logic channel to upper layer Layer provides service.The rlc layer of the second layer supports authentic data to send.The function of rlc layer may be implemented by the functional block in MAC Energy.Packet data convergence protocol (PDCP, the Packet Data Convergence Protocol) layer of the second layer executes header Compression function, to reduce unnecessary control information, to efficiently send internet protocol in the wireless interface with narrow bandwidth Discuss (IP, Internet Protocol) grouping (IPv4, IPv6 etc.).

Wireless heterogeneous networks (RRC, the Radio Resource positioned at third layer lowest part is only defined in control plane Control) layer.Rrc layer control and the configuration of radio bearer (RB) reconfigure and discharge related physical channel, logic Channel and transmission channel.RB refers to by second layer offer, the transmission data between UE and network services.For this purpose, UE The rrc layer of rrc layer and network exchanges RRC information.If established between the rrc layer of wireless network and the rrc layer of UE RRC connection, then UE is in RRC connection mode.Otherwise, UE is in RRC idle mode.Positioned at the supervisory Non-Access Stratum of rrc layer (NAS, Non-Access Stratum) executes the function such as session management and mobile management.

For from network to the DL transmission channel that UE carries out data transmission include broadcast channel for sending system information It (BCH, Broadcast Channel), the paging channel (PCH, Paging Channel) for sending paging message and is used for The DL for sending subscriber traffic or control message shares channel (DL-SCH, DL Shared Channel).Meanwhile it being used for from UE To network carry out data transmission UL transmission channel include for send the random access channel of initial control message (RACH, Random Access Channel) and UL for sending subscriber traffic or control message share channel (UL-SCH, UL Shared Channel)。

Fig. 3 shows the block diagram of the transmitters and receivers for OFDMA and SC-FDMA.In UL, transmitter (402- 414) be UE a part, and receiver (416-430) is a part of e node B.In DL, transmitter is the one of e node B Part, and receiver is a part of UE.

Referring to Fig. 3, OFDMA transmitter includes leaf in deserializer 402, sub-carrier mapping module 406, M point discrete Fourier Inverse transformation (IDFT, Inverse Discrete Fourier Transform) module 408, cyclic prefix (CP, Cyclic Prefix) adding module 410, parallel-to-serial converter 412 and radio frequency (RF, Radio Frequency)/digital analog converter (DAC) mould Block 414.

Signal processing in OFDMA transmitter carries out as follows.Firstly, bit stream is modulated to data symbol sequence.It can be with By executing the various signal processings including channel coding, intertexture, scrambling etc. to the data block sent from MAC layer, bit is obtained Stream.Bit stream is also known as code word and is equal to the data block received from MAC layer.The data block received from MAC layer is also Referred to as transmission block.Modulation scheme may include, but be not limited to, binary phase shift keying (BPSK, Binary Phase Shift Keying), quadrature phase shift keying (QPSK, Quadrature Phase Shift Keying) and n quadrature amplitude modulation (n- QAM, n-Quadrature Amplitude Modulation).Then, serial data symbols sequence is converted into parallel N number of Data symbol (402).N number of data symbol is mapped to the N number of subcarrier distributed in M subcarrier in total, and (M-N) A residue subcarrier fills 0 (406).The data symbol mapped in a frequency domain is converted into time domain sequences by M point IFFT processing (408).Hereafter, in order to reduce intersymbol interference (ISI, Inter-Symbol Interference) and inter-carrier interference (ICI, Inter-Carrier Interference), OFDMA symbol (410) are generated by adding CP to time domain sequences.It is generated Parallel OFDM A symbol is converted into serial OFDMA symbol (412).Then, by digital-to-analogue conversion, frequency up-converted etc. to reception Device sends OFDMA symbol (414).Available subcarrier in (M-N) a remaining subcarrier distributes to other users.Meanwhile OFDMA receiver includes that RF/ analog-digital converter (ADC) module 416, deserializer 418, CP removal module 420, M point are discrete Fourier transformation (DFT) module 422, subcarrier demapping/balance module 424, parallel-to-serial converter 428 and detection module 430. The signal processing of OFDMA receiver has the configuration opposite with OFDMA transmitter.

Meanwhile compared with OFDMA transmitter, SC-FDMA transmitter further includes before being located at sub-carrier mapping module 406 N- point DFT block 404.SC-FDMA transmitter IDFT processing before by DFT extension frequency domain in multiple data, thus with OFDMA scheme is compared, and peak-to-average power ratio (PAPR, the Peak-to-Average Power for sending signal is largely reduced Ratio).Compared with OFDMA receiver, SC-FDMA receiver further includes the N point after subcarrier De-mapping module 424 IDFT module 426.The signal processing of SC-FDMA receiver has the configuration opposite with SC-FDMA transmitter.

Fig. 4 shows the structure of radio frames used in LTE system.

Referring to Fig. 4, radio frames have 10ms (327200T_s) length and subframe including 10 identical sizes.It is each Subframe has the length of 1ms and including two time slot.Each time slot has 0.5ms (15360T_s) length.In the situation Under, T_sIndicate the sampling time, and by T_s=1/ (15kHz × 2048)=3.2552 × 10^-8(about 33ns) is indicated.When each Gap includes multiple OFDM symbols and in a frequency domain includes multiple resource blocks (RB, Resource Block) in the time domain.In LTE In system, a RB includes 12 a OFDM symbols of subcarrier × 7 (or 6).It can be as unit of one or more subframes really It is set for the transmission time interval (TTI, Transmission Time Interval) of the unit time to send for data.On It states wireless frame structure to be entirely exemplary, and can be to number of sub frames, timeslot number or the OFDM symbol number for including in radio frames It carry out various modifications.

Fig. 5 shows the example that communication is executed in simple component carrier environment.Fig. 5 can correspond to the communication in LTE system Example.

Referring to Fig. 5, in FDD scheme, usually by a DL with and held by being brought with DL with a corresponding UL Row communication.In TDD scheme, communication is executed by DL duration and UL duration corresponding with the DL duration. In FDD or TDD scheme, data and/or control information can be sent and received as unit of subframe.By being transmitted across Increase the power in poor channel environment in journey and reduce the power in preferable channel circumstance, UE reduces by excessive transmission power Caused by, with the interference of neighboring community, and optimize quantity of power used by power control scheme.It is bad in channel circumstance In the case of, base station (BS, Base Station) order improves the power of UE.But ignore indicate UE power be more than UE most The big power that sends is (that is, send power limit P^UE _MaxOr P_Max)。

Fig. 6 A shows the structure of UL subframe used in LTE system.

Referring to Fig. 6 A, UL subframe includes multiple time slots (for example, two time slots).According to CP length, time slot may include not With the SC-FDMA symbol of number.For example, time slot includes 7 SC-FDMA symbols in normal CP.UL subframe is divided into data Area and control zone.Data field include Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared CHannel) simultaneously And for sending data-signal, e.g., voice and image.Based on reference signal (RS, Reference included in same area Signal power) determines the power of data-signal.For example, demodulation reference signal (DMRS, DeModulation can be based on Reference Signal) power determine the power of data-signal.

Control zone includes Physical Uplink Control Channel (PUCCH, Physical Uplink Control CHannel), and And various control information are sent to UL.PUCCH includes resource block (RB, the Resource for being located at data field both ends in a frequency domain Block it) pair and based on time slot jumps.Based on the transmission power for the control channel reference signal being located in PUCCH, to determine control The transmission power of information processed.The CONSTRUCTED SPECIFICATION of PUCCH is described later with reference to Fig. 6 B.Detection benchmark for UL channel measurement Signal (SRS, Sounding Reference Signal) is located in the last one SC-FDMA symbol of subframe, and passes through number All or some according to area bring transmission.

UL in LTE system, which is sent, shows single-carrier property using SC-FDMA, and do not allow to send simultaneously PUSCH, PUCCH and SRS.Compared to multicarrier system (e.g., OFDM), by keeping low PAPR, SC-FDMA to make it possible to effective use function Rate amplifier.It therefore, should be by the information that PUCCH is sent with incidentally if data and control signal should be sent simultaneously (piggyback) mode and data-reusing.Moreover, not sending PUSCH or PUCCH in the SC-FDMA symbol for sending SRS. The power control of PUSCH and the power control of PUCCH are independent.

Fig. 6 B shows the structure of PUCCH used in LTE system.

Referring to Fig. 6 B, in normal CP, RS in UL is transmitted in three continuous symbols being located among time slot, and at it Remaining transmission control information (that is, ACK/NACK) in four symbols.In extension CP, time slot includes 6 symbols, and is accorded in third Number and the 4th symbol in transmit RS.Controlling information further includes channel quality indicator (CQI, Channel Quality Indicator), scheduling request (SR, Scheduling Request), pre-coding matrix index (PMI, Precoding Matrix Index), order designator (RI, Rank Indicator) etc..Control information is determined based on the transmission power of RS in UL Transmission power.In the structure of PUCCH, the number of RS and position type according to the control information in UL and change.Utilize meter Constant amplitude zero auto-correlation (CG-CAZAC, Computer Generated Constant the Amplitude Zero that calculation machine generates Auto Correlation) sequence different cyclic shifts (CS, Cyclic Shifts) (frequency expansion) and/or difference Wu Er Assorted (Walsh)/DFT orthogonal code (time extension) distinguishes the resource for controlling information.Even if the w0 being multiplied after IFFT, W1, w2 are multiplied before the ifft with w3, also obtain identical result.Orthogonal mask (OC, the Orthogonal of corresponding length Cover) sequence can be taken on RS.

Fig. 7 shows the example that communication is executed in multiple component carriers environment.Currently, wireless communication system is (for example, LTE-A System) gathered with using broader frequency band using the bandwidth of broader UL/DL bandwidth using by polymerizeing multiple UL/DL frequency chunks Conjunction or carrier aggregation technology.Each frequency chunks are sent using component carrier (CC, Component Carrier).In the specification In, based on context, CC also refers to the mean carrier of the frequency chunks or frequency chunks that polymerize for carrier wave, and they can be with It is mixed.

The bandwidth of 100MHz can be supported referring to Fig. 7, the CC of five 20MHz of each UL/DL.Each CC can be in a frequency domain It adjacent to each other, or can be non-conterminous.For convenience, Fig. 7 show UL CC bandwidth it is identical and right with the bandwidth of DL CC The case where title.However, it is possible to independently determine the bandwidth of each CC.For example, the bandwidth of UL CC may be constructed such that 5MHz (A_UL)+ 20MHz(B_UL)+20MHz(C_UL)+20MHz(D_UL)+5MHz(E_UL).Asymmetric carrier aggregation can also be constructed, wherein UL CC's Number is different from the number of DL CC.Since asymmetric carrier aggregation can be generated in the limitation of available band, or can be in network Asymmetric carrier aggregation is intentionally executed in establishment process.For example, even if whole system band is made of N number of CC, particular UE can be with Received frequency band can also be restricted to M (< N) a CC.Various parameters for carrier wave polymerization can be according to specific cell (cell-specifically), specific UE group (UE group-specifically) or specific UE (UE-specifically) To be arranged.

In lte-a system, transmitting terminal can send multiple signals/(physics) letter simultaneously by single CC or multiple CC Road.For example, two or more the identical or different channels selected from PUSCH, PUCCH or SRS can be sent simultaneously.Cause This, if sending multiple (physics) channels in the case where not keeping single carrier transfer characteristic, then when for the multiple (object Reason) the sum of the transmission power that goes out of channel calculation reaches maximum when sending power limit, need to consider the operation of UE.Unless with other Mode proposes in the present specification, otherwise multiple signals/(physics) channel refer to sending signal that power independently determined/ (physics) channel.For example, multiple signals/(physics) channel includes and the different associated signals of independent RS/(physics) channel. In this specification, the transmission of (physics) channel refers to the transmission that signal is carried out by (physics) channel.In this specification, Signal can be mixed with (physics) channel.

Thereafter, the method that power will be sent referring to Fig. 8 to Figure 11 detailed description control.For convenience, although with exemplary Mode gives the description of Fig. 8 to Figure 11 from the angle of UE, but even if when BS sends multiple signals, it can also be by repairing Change simple application.In embodiments of the present invention, lineal scale or dB scale can be represented as by sending power.According to this hair The operation of bright embodiment can execute in power domain or amplitude domain.

Embodiment 1: consider the power control of (channel) priority

Fig. 8 shows the exemplary transmission power control of embodiment according to the present invention.In this embodiment, it proposes When the sum of transmission power of multiple physical channels be more than it is maximum send power when, consider (channel) priority to control physics letter The transmission power in road.

Referring to Fig. 8, UE can receive one or more transmission power control (TPC, Transmit Power from BS Control) (S810) is ordered.TPC command may include the Huo Zheke in the response message to the lead code for random access To be sent by Physical Downlink Control Channel (PDCCH, Physical Downlink Control CHannel).Under Row control information (DCI, Downlink Control Information), PDCCH can have various formats, and according to lattice Formula can have different TPC commands.For example, UE can receive the PDCCH of various formats, such as the format of DL scheduling, use In format, the TPC professional format for PUSCH and the TPC professional format for PUCCH of UL scheduling.TPC command can be used for Determine that each CC's sends power, the transmission power of CC group or the transmission power of all CC.TPC command can be also used for determining each letter The transmission power of number (e.g., PUSCH, PUCCH etc.).It can be by the PDCCH of various formats (e.g., for the format of DL scheduling, use In UL scheduling format, for UL data channel (e.g., PUSCH) TPC professional format and for UL control channel (e.g., PUCCH TPC professional format)) receive TPC command.

If there is the multiple physical channels for being scheduled as sending to BS simultaneously, then UE distinguishes for multiple UL physical channels It determines and sends power P₁,P₂,…,P_N(wherein, N >=2) (S820).Each UL physical channel includes one or more continuous OFDMA symbol or SC-FDMA symbol.In Fig. 9, but it is not limited to Fig. 9, shows showing for the case where UE sending multiple signals to UL Example.Referring to Fig. 9, it can use single CC or multiple CC while sending multiple physical channels.For example, multiple PUCCH, multiple PUSCH or multiple SRS can be sent (example 1 to 3) simultaneously, or can send the group of PUCCH, PUSCH and/or SRS simultaneously It closes (example 4 to 7).It can be the case where sending ACK/NACK, CQI and SR with exhaustive division in the case where PUCCH.

If it is determined that UL sends power, then UE checks the summation ∑ P of the transmission power of UL physical channel_n(wherein, 1≤n ≤ N) whether it is greater than maximum power value P_Max(S830).Maximum power value can be determined as unit of CC, CC group or whole CC.Most High-power value is substantially dependent on the physical capability of UE, but can be predefined according to communication system.It is considered that cell In permission power, load balance etc. change maximum power value.Therefore, in this specification, maximum power value can be with maximum It is mixed to allow performance number, and the two may be used interchangeably.Information about maximum power value can be in cell by wide Message (for example, system information) is broadcast to broadcast, or can be sent by RRC information with signal.Letter about maximum power value Breath can be sent by DL control channel (e.g., PDCCH) to UE.Can according to channel circumstance permanently, semi-permanently or dynamic Maximum power value is arranged in ground.When by BS send signal to limit maximum power value when, maximum power value can have with it is small The identical meaning of maximum allowable power in area.For example, maximum power value can predefine, or can according to specific cell, Specific UE group, specific UE, specific CC group or specific CC are specified.

If the summation ∑ P of the transmission power of UL physical channel_n(wherein, 1≤n≤N) is equal to or less than maximum power value P_Max, then the transmission power of corresponding UL physical channel is kept.Meanwhile if the summation of the UL transmission power of UL physical channel is big In maximum power value, then priority is considered, control the transmission power of one or more UL physical channels, so that UL physical channel Transmission power summation be no more than maximum power value (S840).It is contemplated that in the type and UL physical channel of UL physical channel The information of carrying determines priority.Priority is described more fully below.It can be single for all bands or with CC group or CC Position controls transmission power.

If controlling the transmission power of UL physical channel, UE, which is generated, has the corresponding multiple UL physical channels for sending power (S850).Before the ifft, the transmission power (408 in Fig. 3) of UL physical channel can be controlled in a frequency domain.But it is of the invention It is without being limited thereto.In such a case it is possible to execute the control for sending power as unit of subcarrier.For example, can be by that will map To subcarrier modulation value multiplied by weight, to control transmission power.Each element, which can be used, indicates value related with power is sent Diagonal matrix (power diagonal matrix) come multiplied by weight.In multiple-input and multiple-output (MIMO, Multiple Input Multiple Output) in the case where system, it can use and incorporate the pre-coding matrix of weight to control transmission power, or Modulation value after precoding can be controlled transmission power multiplied by power diagonal matrix by person.Therefore, even if multiple physical channels Including can also easily control the transmission power of each physical channel in the frequency band for applying identical IFFT.In frequency domain Power control separates together or with the power control in frequency domain, can control the hair of UL physical channel in the time domain after the ifft Send power.Specifically, the transmission power control in time domain can be executed in various functional blocks.For example, can DAC block and/ Or the control for sending power is executed in RF block (the 414 of Fig. 3).Hereafter, UE sends multiple lifes to BS by one or more CC At UL physical channel (S860).In this specification, while or same time period include identical TTI or subframe.

The method that will be described in considering transmission power of the priority to control UL channel in the step 840 of Fig. 8.In order to It is convenient, by description according to same sequence or the exemplary power control method of priority when there is only two channels.But this Invention can be applied to the channel or combinations thereof of three or more identical or different types.

For convenience, following symbol is defined.

P_PUSCH: it indicates the power for calculating PUSCH to be distributed to.By power limit, the power actually distributed may Less than P_PUSCH.If not representing dB, this can indicate lineal scale.

P_PUCCH: it indicates the power for calculating PUCCH to be distributed to.By power limit, the power actually distributed may Less than P_PUCCH.If not representing dB, this can indicate lineal scale.

P_SRS: it indicates the power for calculating SRS to be distributed to.By power limit, the power actually distributed is likely less than P_SRS.If not representing dB, this can indicate lineal scale.

Example 1-1:P_PUSCH+P_PUSCH>P_Max

Example 1-1 corresponds to the multiple PUSCH sent simultaneously in multiple and different CC and reaches maximum the case where sending the limit. In such a case it is possible to reduce or reduce the transmission power of each PUSCH.Specifically, it may be considered that following option.

Option 1: the identical priority of PUSCH can be assigned.If so, can reduce at the same rate PUSCH's Power, or reduce same amount of power of PUSCH.I.e., it is possible to using identical attenuation rate or subtract identical value.

Option 2: it is contemplated that the transformat of PUSCH, assigns priority to PUSCH.For example, can be according to transmission block ruler Very little (TBS, Transport Block Size) or modulation and encoding scheme (MCS, Modulation and Coding Scheme priority is determined) sequentially to reduce or reduce the transmission power of PUSCH with low priority.Desirably, it assigns PUSCH low priority with small TBS (data volume), low MCS (low bit- rate) or low modulation order (modulation order). In such a case it is possible to which bigger attenuation rate is applied to PUSCH with low priority.But even if due to PUSCH Reduction (drop) only retain a PUSCH, send power still above maximum and send the limit, then it is corresponding in transmission process The power of PUSCH is also reduced to P_Max。

Example 1-2:P_{PUCCH(ACK/NACK)}+P_PUSCH>P_Max

Example 1-2 is the transmission power of the PUCCH of PUSCH and transmission ACK/NACK in different CC or in a CC The sum of when reaching maximum power limit the case where.It is contemplated that following option.

Option 1: ACK/NACK priority can be assigned.UL ACK/NACK is used to report the success or mistake of DL data receiver It loses.If incorrect carry out such report, DL resource is wasted.Therefore, high priority is distributed to the hair of ACK/NACK It send, and reduces or reduce the transmission power of PUSCH in transmission process.In the case where reducing the transmission power of PUSCH, hair Send power that can be first allocated to PUCCH, and remaining power can distribute to PUSCH.This can by following formula come It indicates: P_PUSCH=P_max-P_{PUCCH(ACK/NACK)}.Here it is possible to the option below additional application.

Option 1.1: since remaining power is used for PUSCH after distributing transmission power to PUCCH, so making PUSCH's Error rate increases.Therefore, reduce the MCS to the PUSCH data sent in transmission process, before allowing to reduce with power The identical error rate of error rate receive PUSCH.For this purpose, information related with the MCS after reduction can be sent to BS with signal.

Option 2: PUSCH priority can be assigned.If reducing the power for sending the PUCCH of ACK/NACK, due to UL The reception mistake of middle ACK/NACK and waste DL resource.In particular, there is the re-transmission on upper layer if NACK is identified as ACK, And more postpone the transmission of DL data.Meanwhile if ACK is identified as NACK, only occurs the wave retransmitted within the physical layer Take.Therefore, in the case where sending emergency data, for due to the case where postponing data with continuous low power transmission PUSCH It prepares, it may be considered that first to PUSCH distribution power, and distribute dump power (reduced power) to PUCCH.In the situation Under, it is expected that the power reduction of PUCCH is limited to the case where PUCCH sends ACK.

Example 1-3:P_SRS+P_PUSCH>P_Max

Example 1-3 corresponds to the sum of the transmission power of SRS and PUSCH in different CC or in a CC and reaches maximum power The case where limit, is corresponding.It is contemplated that following option.

Option 1: SRS can be assigned and send priority.When BS executes best UL scheduling by measuring UL channel status, Use SRS.In view of the efficiency dispatched next time, high priority can be distributed to SRS.Then, in transmission process, reduce or Reduce the transmission power of PUSCH.In order to reduce the transmission power of PUSCH, SRS can be first allocated to by sending power, and be remained Complementary work rate can distribute to PUSCH.This can be indicated are as follows: P_PUSCH=P_Max-P_SRS.In such a case it is possible to below additional application Option.

Option 1.1: since remaining power is used for PUSCH after distributing transmission power to SRS, so the mistake of PUSCH Rate increases.Therefore, reduce the MCS to the PUSCH data sent in transmission process, allow to the mistake before reducing with power Accidentally the identical error rate of rate receives PUSCH.For this purpose, information related with the MCS after reduction can be sent to BS with signal.

Option 2: PUSCH can be assigned and send priority.If reducing the transmission power of SRS, because BS is unaware that The reduction for receiving power is as caused by the ambient condition difference of UL wireless channel or since the UE transmission for reducing power is made At, it is possible that being judged by accident to channel information.Therefore, if sending power is deficiency, SRS can be reduced.

Example 1-4:P_{PUCCH(ACK/NACK)}+P_{PUCCH(ACK/NACK)}>P_Max

The sum of the transmission power of multiple PUCCH that example 1-4 corresponds to transmission ACK/NACK reaches maximum power limit Situation.In this case, reduce or reduce the transmission power of each PUCCH.Specifically, it may be considered that following option.

Option 1: the identical priority of PUCCH for sending ACK/NACK can be assigned.If so, then can be with mutually year-on-year Rate reduces the power of PUCCH, or reduces same amount of power of PUCCH.I.e., it is possible to using identical attenuation rate or subtract Identical value.

Option 2: according to priority, it can reduce or reduce the power of a part of PUCCH.

Option 2.1: if NACK is identified as ACK, compared with the case where ACK is identified as NACK, the wasting of resources and It is more serious to send delay.Therefore, reduce or reduce the transmission power for sending the PUCCH of ACK first.It is contemplated that setting certain threshold Value and power is reduced to the threshold value.

Option 2.2: determine that PUCCH's is excellent according to the TBS or MCS of PDSCH corresponding with the ACK/NACK of each PUCCH First grade, and reduce or reduce the transmission power of PUCCH with low priority.It is desirable that, to small TBS's or low MCS PDSCH distributes low priority.But in the case where reducing PUCCH, even if only retaining a PUCCH, power is sent More than maximum power limit, then the power of corresponding PUCCH is reduced to P in transmission process_max。

Example 1-5:P_PUCCH(CQI)+P_PUCCH(CQI)>P_Max

The sum of the transmission power of multiple PUCCH that example 1-5 corresponds to the transmission CQI in different CC reaches maximum power pole The case where limit.CQI is used for by identifying that the state of DL wireless channel is dispatched to execute efficient DL.Following option can be considered.

Option 1: the identical priority of PUCCH for sending CQI can be assigned.If so, can subtract at the same rate The power of small PUCCH, or reduce the same amount of power of PUCCH.I.e., it is possible to using identical attenuation rate, or subtract identical Value.

Option 2: it can reduce or reduce a part of PUCCH power according to priority.BS is by selection with high CQI's Wireless channel executes the scheduling for UE.Since the channel with low CQI is less likely to be selected by BS, so being properly received not It is too important.Therefore, reduce or reduce the transmission power of the PUCCH with low CQI first in transmission process.It can be set specific Threshold value, and can be considered and power is reduced to the threshold value.

Example 1-6:P_{PUCCH(ACK/NACK)}+P_PUCCH(CQI)>P_Max

When the sum of the transmission power of multiple PUCCH for sending CQI and ACK/NACK reaches maximum power limit, using reality Example 1-6.As described earlier, assign ACK/NACK high priority.Meanwhile CQI is dispatched for efficient DL, sends DL as to BS The information of channel status.Even if distributing better channel to UE can also go out if cannot accurately confirm normally receiving for data Existing unnecessary re-transmission.Therefore, CQI low priority is assigned.That is, first to the PUCCH distribution power for sending ACK/NACK, and Dump power is distributed to the PUCCH for sending CQI, or reduces the PUCCH for sending CQI.Meanwhile with transmission ACK/NACK's The identical mode of PUCCH handles the PUSCH for sending both CQI and ACK/NACK.

Example 1-7:P_PUCCH(SR)+P_{PUCCH(ACK/NACK)}>P_Max

The sum of the transmission power of multiple PUCCH that example 1-7 corresponds to transmission SR and ACK/NACK reaches maximum power pole The case where limit.Following option can be considered.

Option 1: ACK/NACK can be assigned and send high priority.Therefore, first to the PUCCH distribution for sending ACK/NACK Power, and dump power is distributed to the PUCCH for sending SR, or reduce the PUCCH for sending SR.Meanwhile if due to sending The PUCCH long-time continued presence of ACK/NACK and reduce send SR PUCCH, then can not can be carried out UL scheduling.In order to this It compensates, if the PUCCH for sending SR is delayed by specific time, the PUCCH for sending ACK/NACK can be reduced.

Option 2: SR can be assigned and send high priority.Due to solving ACK/NACK transmission mistake by retransmitting, so In view of scheduling is important, distribution high priority can be sent to SR, and can reduce or reduce hair in transmission process Send the transmission power of the PUCCH of ACK/NACK.In the case where reducing the transmission power for sending the PUCCH of ACK/NACK, send Power can be first allocated to the PUCCH for sending SR, and dump power can distribute to the PUCCH for sending ACK/NACK.This It can be represented as: P_{PUCCH(ACK/NACK)}=P_Max-P_SR。

Option 3:UE sends ACK/NACK to the PUCCH for sending SR.Then, BS can be by energy measuring in PUCCH It detects the SR of on-off keying (on/off keyed), and can be decoded by symbol and judge ACK/NACK.In this case, If there is the multiple PUCCH for sending ACK/NACK, then ACK/NACK binding (bundling) or PUCCH selection hair can be used It send.ACK/NACK binding indicate: when it is no it is any mistakenly receive multiple DL PDSCH and all ACK should be sent when transmission One ACK, and a NACK is sent when even there is mistake in any one DL PDSCH.PUCCH selection sends table Show that the PUCCH resource for passing through once receive multiple DL PDSCH and selecting from the PUCCH resource of multiple occupancy is sent to adjust Multiple ACK/NACK results of value processed.

Example 1-8:P_PUSCH(UCI)+P_PUSCH>P_Max

Example 1-8, which corresponds in different CC, sends ascending control information (UCI, Uplink Control Information) PUSCH and only send the sum of the transmission power of PUCCH the case where reaching maximum power limit of data.It is contemplated that following choosing ?.

Option 1: method is determined using the priority described in example 1-1 in the case where not considering UCI.For example, can To assign the identical priority of PUSCH.In this case, the power of PUSCH can be reduced with same ratio.In view of PUSCH Transformat, different priority can be distributed to PUSCH.

Option 2: since control information includes in the PUSCH for incidentally have UCI above, so high priority can be distributed to Incidentally there is the channel of UCI above.Therefore, reduce or reduce the transmission power for only sending the PUSCH of data in transmission process.? In the case where reducing the transmission power of PUSCH for only sending data, upward incidentally there is the PUSCH distribution of UCI to send function first Rate then can distribute dump power to the PUSCH for only sending data.This can be represented as: P_PUSCH=P_Max-P_PUSCH(UCI)。 In the case where reducing the transmission power of PUSCH for only sending data, higher attenuation rate can be applied to only send data PUSCH.But even if due to PUCCH reduction and only retain a PUSCH, send power also above maximum send function The power of corresponding PUSCH is then reduced to P in transmission process by rate_Max。

Example 1-9:P_{PUSCH(Retransmission)}+P_PUSCH>P_Max

Example 1-9 corresponds to the sum of the transmission power of PUSCH for sending the PUSCH for retransmitting data and sending new data and reaches The case where maximum power limit.

Option 1: method is determined using the priority described in example 1-1 in the case where not considering re-transmission.For example, can To assign the identical priority of PUSCH.In such a case it is possible to reduce the power of PUSCH at the same rate.It considers The transformat of PUSCH can distribute different priority for PUSCH.

Option 2: due to retransmit may be due in transmission process before send power reduction and occur, so High priority can distribute to the PUSCH of re-transmission, to improve the acceptance rate of PUSCH.

Example 1-10:P_{PUSCH(Retransmission)}+P_{PUSCH(Retransmission)}>P_Max

Example 1-10, which corresponds to, sends the feelings that the sum of the transmission power of PUSCH for retransmitting data reaches maximum power limit Condition.It is contemplated that following option.

Option 1: in the case where not considering re-transmission, priority described in example 1-1 can be used and determine method.Example Such as, it can assign PUSCH identical priority.In such a case it is possible to reduce the power of PUSCH with same ratio.It considers The transmission format of PUSCH, different priority can distribute to PUSCH.

Option 2: due to retransmit may be due in transmission process before send power reduction and occur, so High priority can distribute to the PUSCH with larger number of retransmissions, to improve the acceptance rate of the PUSCH retransmitted.

Example 1-11:P_{PUSCH(Retransmission)}+P_PUCCH/P_SRS>P_Max

Example 1-11 corresponds to transmission the sum of the power and the transmission power of PUCCH/SRS for sending the PUSCH for retransmitting data The case where reaching maximum power limit.Following option can be considered.

Option 1: in the case where not considering re-transmission, priority described in example 1-2 and example 1-3 can be used and determine Method.

Embodiment 2: the power control of every CC (group)

When UE has a power amplifier, the transmitted power control method of the UE up to the present described is useful 's.But in lte-a system, multiple CC can distribute to UE, and the CC distributed can be continuous in a frequency domain or divide From band.If the CC distributed exists as separation band, due to being difficult to make UE that a power amplifier be used only in width Power is amplified in frequency domain, it is possible that needing multiple power amplifiers.In this case, each power amplifier can be born Blame only one CC or the power amplification by some CC only one CC group formed.Therefore, even if UE has multiple power amplifications Device can also apply power by the way that method presented above to be expanded to the Poewr control method of each CC or CC group naturally Control.

Hereafter, by description, there are the environment of both the transmission power limit of each CC (group) and total transmission power limit of UE In, when UE reaches the transmission power limit of specific CC (group), UE reaches total transmission power limit or UE reaches above-mentioned two When power limit, the operation of UE according to an illustrative embodiment of the invention.

In general, power can be sent as shown in following formula 1, limited the UL of UE:

[formula 1]

If the quantized level of the power amplifier of UE is sufficiently high, can satisfy such as indicates equal by formula 2:

[formula 2]

Symbol used in above formula is such as given a definition.

P^UE: the UL of UE sends power

The maximum of UE sends power (or sending power threshold).In other words, this is indicated for institute There is the maximum of CC to send power (or sending power threshold).The maximum transmission power value of UE can be by total transmission power of UE It determines, or can be determined by the combination of value set in network (e.g., BS).It is related with the maximum transmission power value of UE Information can be indicated by top signaling.For example, information related with the maximum transmission power value of UE can pass through broadcast Message is sent according to specific cell (cell-specifically) with signal, or can be by RRC information according to specific UE Or specific UE group is sent with signal.

It is maximum in i-th of CC (group) to send power (or sending power threshold).The maximum hair of each CC (group) It send performance number that can be determined by the transmittable power of total transmittable power or each CC (group) of UE, or network can be passed through It is determined in (e.g., BS) for the combination of value set by each CC (group).Have with the maximum transmission power value of each CC (group) The information of pass can be indicated by top signaling.For example, information related with the maximum transmission power value of each CC (group) can be with Sent by broadcasting the message with signal according to specific cell (cell-specifically), or can by RRC information according to Specific UE or specific UE group and sent with signal.Simultaneously, it is contemplated that about the interference (or covering) with other UE (or CC (group)) Information, the maximum transmission power value of each CC (group) can be sent with signal.Maximum with each CC (group) sends power Being worth related information may include the information about the interference (or covering) with other UE (or CC (group)).In all CC (CC group) In, the maximum power that sends of each CC (group) can have identical value.

The transmission power of j-th of channel of i-th of CC (group).

Example 2-1:

Example 2-1 is when maximum maximum of the sum of the power less than UE that send of the CC (CC group) in all CC (CC group) is sent Power is and at the same time when maximum of the sum of the maximum transmission power of the channel of all CC (CC group) less than UE sends power.Due to UE Transmission power be not limited to total transmission power value, it is possible to meet simplified formula 3:

[formula 3]

If the quantized level of the power amplifier of UE is sufficiently high, can satisfy such as indicates equal by formula 4:

[formula 4]

In formula 3 and formula 4, set S refers to maximum hair of the sum of the transmission power of CC (group) interior channel more than CC (group) Send performance number (that is,) CC (group) set.In this case, control sends the sum of power, not surpass It crosses the maximum of CC (group) in only set S and sends power.Power control can be executed by introducing attenuation coefficient.For example, power control System can simplify to search for the attenuation coefficient of the transmission power of each channel Method, as shown in formula 5:

[formula 5]

Wherein i ∈ S

Example 2-2:

Example 2-2 is less than maximum the sum of the power that sends of CC (group) and at the same time being less than corresponding to the maximum power that sends of UE The case where the sum of transmission power of all channels.Since the transmission power of UE is limited by maximum transmission power value, so meeting formula 6:

[formula 6]

If the quantized level of the power amplifier of UE is sufficiently high, can satisfy such as indicates equal by formula 7:

[formula 7]

In the case that, such as in example 2-1, the transmission power of UE can reduce the maximum of UE and send power.Each CC The sum of transmission power of (group) interior channel should be less than the maximum of CC (group) and send power, and the transmission power of all CC (group) The sum of should be less than UE maximum transmission power value.Power control can simplify to search for the decaying system of the transmission power of each channel NumberMethod, as shown in formula 8:

[formula 8]

Wherein i ∈ S

The method as described in example 2-1 and example 2-2 is (total to send power pole by the limit for optimizing two kinds of situations Limit and CC (group) send power limit) attenuation coefficient is calculated, it may occur that executing optimization using some complicated methods The problem of.Therefore, the method that 0 and Figure 11 description is used to efficiently calculate attenuation coefficient referring to Fig.1.

In Figure 10 and Figure 11, trunnion axis indicates CC (group), and vertical axis indicates power level.Shade in each CC (group) Frame indicates the channel in corresponding CC (group).In order to easily indicate channel, shade is shown.Each shade can indicate different channels Or same channel.In Figure 10 and Figure 11, it is assumed that the sum of transmission power of CC (CC group) is greater than the maximum transmission power value P_ of UE UE_MAX, and the sum of transmission power of channel in CC (CC group) 1 and 3 respectively more than CC (CC group) it is maximum send power P _ CC1_MAX and P_CC3_MAX ((a) of Figure 10 and (a) of Figure 11).The collection that the composition of CC (CC group) 1 and 3 is described referring to formula 3 and formula 4 Close S.

Figure 10 shows the method for calculating the attenuation coefficient for power control of embodiment according to the present invention. Referring to Fig.1 0, the attenuation coefficient for being used for power control is calculated with two steps.In the first step, can decay in set S The transmission power of channel, to meet the transmission power limit criterion of CC (group).It in the first step, can be according to formula 9 independently Determine attenuation coefficient

[formula 9]

Wherein i ∈ S

From (b) of Figure 10 it can be seen that the sum of the transmission power of channel is respectively reduced to corresponding CC in CC (CC group) 1 and 3 The maximum transmission power value of (CC group).

But in (b) of Figure 10, the maximum transmission power value P_ of UE is still greater than in the sum of transmission power of CC (CC group) UE_MAX.As a result, even if the transmission power of channel reduces in set S, it is also unsatisfactory for total transmission power limit of UE, then is existed In second step, reduce the transmission power of all channels of all CC (CC group), to meet total transmission power limit.In second step In rapid, attenuation coefficient can be independently determined according to formula 10

[formula 10]

From (c) of Figure 10 as can be seen that the sum of the transmission power of all channels is reduced to total transmission power threshold of UE P_UE_MAX.For simplicity, in set S channel attenuation coefficientIt can be set to 1, and can be only for set S's Supplementary set is closed to determineAlternatively, set S supplementary set close in channel attenuation coefficientIt can be set to 1, and can be with It is determined only for set S

Figure 11 show according to another implementation of the invention for calculates be used for power control attenuation coefficient Method.Referring to Fig.1 1, the attenuation coefficient for power control is mainly calculated with two steps, and can also include adding Step is used for power compensation.In the first step, can decay the transmission power of channel in all CC (CC group), to meet UE's It is total to send power limit criterion.Attenuation coefficient can be independently determined according to formula 11

[formula 11]

From (b) of Figure 11 as can be seen that reducing the transmission power of channel in all CC (CC group), so that the hair of all channels Send the sum of power consistent with total transmission power threshold P_UE_MAX of UE.

But in (b) of Figure 11, the power pole of CC (group) 3 is still greater than in the sum of the transmission power of channel of CC (group) 3 Limit value P_CC3_MAX.Therefore, even if being also unsatisfactory for CC if there is the transmission power for reducing channel in all CC (CC group) The CC (group) (that is, set S) of the transmission power limit of (group) then can reduce all CC (CC in set S in the second step Group) channel transmission power.Attenuation coefficient can be independently determined according to the condition of formula 12

[formula 12]

Wherein i ∈ S

From (c) of Figure 11 as can be seen that the sum of the transmission power of channel of CC (group) 3 (that is, set S) is reduced to corresponding CC The maximum transmission power value P_CC3_MAX of (group).

Then, it in third step, for the channel in the supplementary set of set S, can compensate from the reduction of the channel of set S Quantity of powerPower should not be more than corresponding CC's (group) after the compensation of channel Maximum transmission power value.1 (d) referring to Fig.1, in the second step from the reduced power compensation of CC (group) 3 to CC (group) 2.With (d) of Figure 11 from the reduced power of CC (group) 3 on the contrary, can compensate to CC (group) 1 in the second step.It is following to be considered power Compensation method.

1. priority criteria: excellent to distribute according to the different degree of message in channel (PUCCH, PUSCH and SRS) or urgency First grade, and to the more power of channel distribution with higher priority.

2. identical compensation rate: for all channels of the supplementary set of set S, compensating same amount of power.

3. identical cancellation ratio: for all channels of the supplementary set of set S, compensating power with same ratio.

4. compensating power using possibility combination 1., 2. and 3..

The attenuation coefficient of 0 and Figure 11 description referring to Fig.1 can be determined in various waysWithFor determining decaying system NumberWithCriterion it is contemplated that but being not limited to priority, identical attenuation, identical rate of decay or combinations thereof.

In priority criteria method, according to the different degree of the message in channel (e.g., PUCCH, PUSCH and SRS) or tightly Anxious degree, to each channel assignment priority, and the attenuation factor value bigger to the channel distribution with higher priority.That is, should Method is ensured to be channel with high priority and improves acceptance rate, and statistically lower to channel with low priority offer Acceptance rate.Therefore, power is reduced since channel with low priority.It can be determined according to examples detailed above 1-1 to 1-11 The priority of channel, and can be with the priority between additional consideration CC.For example, if UE attempts to carry out UL hair using multiple CC It send, then can send the important control information or important messages in UL transmission message to specific CC first.In such a case it is possible to High priority is distributed to the specific CC for sending important control information.

By the way that attenuation coefficient is limited to 0 or 1Priority criteria method can be revised as simpler Single method.Power 0 is sent i.e., it is possible to distribute in order since channel with low priority in CC (group), so that channel The sum of transmission power be less than the transmission power threshold of CC (group)Therefore, channel with low priority is not sent, And channel with high priority is sent with originally transmitted power.

Identical attenuation criterion method is used to make all channels in each CC (group) of the transmission power limit more than CC (group) Reduce same amount of power.That is, channel all in CC (group) is subjected to the loss of identical power attenuation.When CC (group) interior channel Difference between the maximum transmission power value of CC (group) of the sum of transmission power it is unobvious when, this method can be useful.Phase It can be by identical attenuation coefficient applied to the transmission power pole in each CC (group) being more than CC (group) with attenuation rate criterion method All channels of limit.Identical attenuation criterion method corresponds to the method for reducing same amount of power with lineal scale, and Identical attenuation rate criterion method corresponds to the method for reducing same amount of power with dB scale.

The power control of every antenna in embodiment 3:MIMO

Even if in the transmission by sending (Tx) diversity or spatial reuse using MIMO, also in the same manner using above-mentioned Poewr control method.In this case, the above method is corresponding with the operation in layer, stream or antenna.If UE includes a plurality of hair Antennas, then the maximum power that sends in the power amplifier of each antenna can be limited to(wherein, n is a day clue Draw).The maximum power that sends of each antenna can limit by the characteristic (e.g., grade) of power amplifier, or can by broadcasting or (additional) limitation of RRC signaling.The upper limit for the transmission power that UE can be used is limited by both following minimum value: the maximum of antenna It sends the sum of power and sends power with the maximum of UE, as shown in Equation 13:

[formula 13]

If limiting the transmission power of each CC (group), the upper limit for the transmission power that UE can be used can be by 14 table of formula Show:

[formula 14]

Hereafter, when independently executing power control for each antenna, the operation of UE is proposed.For convenience, with exemplary Mode only describes two antennas, but the present invention can be applied to three or more antennas.Define following symbol.

Calculate the power for distributing to n-th antenna.The power actually distributed may be small due to power limit In the power.When not having dB symbol, this can indicate lineal scale.X-CH indicates all physical channels sent to antenna n (e.g., PUSCH, PUCCH, SRS or combinations thereof).

IfThen 1 antenna reaches maximum power limit, and Other antennas are not up to maximum power limit.In this case, power control is executed to every antenna as follows.

Step 1: maximum according to each CC (group) sends power limitCan be as in embodiment 2, control is used In the transmission power of each CC (group).That is, if the sum of the transmission power of channel of all antennas of each CC (group) is more thanThen control transmission power.Only in the case where executing the power control of each CC (group), including step 1.

Step 2: maximum in view of antenna sends power, can be as controlled the transmission function of each antenna in following option Rate.It can be by various methods (e.g., priority) described in application implementation mode 1 and embodiment 2, to control the hair of antenna Send power.

Option 1: when using a plurality of transmission antenna, precoding can be executed, for sending.In order to make receiving end to through pre- The signal of coding is decoded, and receiving end should be by pre-coding matrix used in identification transmitting terminal come with the opposite of transmitting terminal Sequence executes decoding.But if since the power limit of antenna does not keep the power ratio of antenna, what is applied from transmitting terminal Distortion is likely to occur in pre-coding matrix, thus error rate increases.Therefore, there is the antenna for sending power limit by basis, The power that the antenna without sending power limit is adjusted with same ratio, can prevent the distortion of pre-coding matrix.That is, not up to The transmission power of the antenna of maximum power limit reduces together with the transmission power of antenna for being more than power limit, so that sending function Rate ratio maintains identical level.If there is three or more antennas, then according to the hair of the antenna reduced with maximum rate Power is sent, the transmission power of other antennas can be adjusted at the same rate.In option 1, actual transmission powerIt is as follows:

[formula 15]

Formula 15 indicates the actual transmission power when power limit is not present.

[formula 16]

Formula 16 indicates that there are actual transmission powers when power limit.Referring to formula 16, due to the transmission function of channel in antenna n The sum of rate is more than maximum transmission power, so the actual transmission power of antenna n is restricted to maximum transmission power.Meanwhile even if The sum of transmission power of the channel of antenna m is less than maximum transmission power, with ratioReduce antenna m's Power is sent, so that keeping the transmission power ratio with antenna n.

Option 2: if due to any one antenna power limit and cannot keep by power control signal indicate it is each The power ratio of antenna is then distorted from the pre-coding matrix that transmitting terminal applies.If the unidentified distortion factor in receiving end, Error rate is received to increase.But estimate indirectly when by dedicated reference signals (DRS, Dedicated Reference Signal) When counting pre-coding matrix used in transmitting terminal, receiving end can also be estimated to prelist according to the variation of the transmission power ratio of antenna The distortion of code matrix.In this case, as in option 1, the transmission power of the not antenna of power limit can not be reduced, with control System sends power ratio.Therefore, power can be sent by clamping down on the maximum of respective antenna, only sends and reaches maximum power limit The transmission power of antenna.Power used in actually sending in option 2 is as follows:

[formula 17]

Formula 17 indicates that there is no actual transmission powers when power limit.

[formula 18]

Formula 18 indicates that there are actual transmission powers when power limit.Referring to formula 18, due to the transmission function of channel in antenna n The sum of rate is more than maximum transmission power, so the actual transmission power of antenna n is limited to maximum transmission power.Simultaneously as antenna m The sum of transmission power of middle channel is less than maximum transmission power, so executing transmission in the case where no power control.

Figure 12 shows the BS and UE of embodiment for use in the present invention.

Referring to Fig.1 2, wireless communication system includes BS 110 and UE 120.In DL, transmitter is one of BS 110 Point, and receiver is a part of UE 120.In UL, transmitter is a part of UE 120, and receiver is BS 110 A part.BS 110 includes processor 112, memory 114 and RF unit 116.Processor 112, which may be constructed such that, realizes this hair The processing and/or method of bright middle proposition.Memory 114 is connected to processor 112 and stores related with the operation of processor 112 Various information.RF unit 116 is connected to processor 112 and sends and receives wireless signal.UE 120 includes processor 122, memory 124 and RF unit 126.Processor 122, which may be constructed such that, realizes the processing proposed in the present invention and/or side Method.Memory 124 is connected to memory 122 and stores information related with the operation of processor 122.RF unit 126 connects To processor 122 and send and receive wireless signal.BS 110 and/or UE 120 may include single antenna or more days Line.

Above-mentioned example embodiment is the combination of element and feature of the invention.These elements or feature may be considered that It is selective, unless otherwise mentioning.Each element can be practiced in the case where not combining with other element or feature Or feature.Further, by built-up section element and/feature, embodiments of the present invention can be constructed.In reality of the invention Applying operation order described in mode can rearrange.Some constructions of any one embodiment may include in other realities It applies in mode, and can be replaced with the relative configurations of other embodiments.It obviously, can be by not having appended claims The combination of the claim of clear adduction relationship constitutes embodiment in book, or by modification may include newly weighing after application Benefit requires.

In this document, the data transmission and reception relationship between UE and BS is described.Here, it is described Specific operation to be executed by BS can be executed by the upper node of BS.I.e., it is obvious that by multiple networks including BS In the network of node composition, the various operations for being communicated and being executed with UE can be executed by BS, or can be by addition to BS Other network nodes execute.Term BS can be replaced with term fixed station, node B, e node B (eNB), access point etc.. Term UE can be replaced with term movement station (MS), mobile subscriber station (MSS) etc..

Exemplary embodiments of the present invention (e.g., hardware, firmware, software or combinations thereof) can be come in fact by various modes It is existing.In hardware construction, exemplary embodiments of the present invention can by one or more specific integrated circuits (ASIC, Application Specific Integrated Circuits), digital signal processor (DSP, Digital Signal Processors), digital signal processing device (DSPD, Digital Signal Processing Devices), programmable patrol Collect device (PLD, Programmable Logic Devices), field programmable gate array (FPGA, Field Programmable Gate Arrays), processor, controller, microcontroller, microprocessor etc. realize.

In firmware or software construction, exemplary embodiments of the present invention can be by the mould of the above-mentioned functions or operations of execution Block, process, function etc. are realized.Software code can store in the memory unit and processor executes software code.Storage Unit can be located at the internal or external of processor, and can be by various known ways to processor transmission data and from It manages device and receives data.

It will be obvious to a person skilled in the art that without departing from the spirit or scope of the invention, it can be to the present invention It carry out various modifications and modification.Thus, if these modifications and variations fall into the range of the appended claims and its equivalent Interior, then the present invention also covers these modifications and variations.

Industrial application

Present invention could apply to wireless communication systems.Specifically, present invention could apply to send function for controlling UL The method and apparatus of rate.

Claims

1. a kind of for controlling the side of the transmission of signal by communication equipment in the wireless communication system for supporting multiple component carriers Method, method includes the following steps:

Whether the total transmission power for checking the multiple channels for being used for while sending on the multiple component carrier is more than to be directed to Total peak power output of the communication device configured,

Wherein, the value detects reference signal SRS and second component carrier wave that the multiple channel includes the first component carrier are physically The shared channel PUSCH of row；And

If total transmission power of the multiple channel on the multiple component carrier is more than to set for the communication Total peak power output of standby configuration, then lose the transmission of the SRS.

2. according to the method described in claim 1, this method is further comprising the steps of:

The PUSCH is sent on the second component carrier wave in the multiple component carrier.

3. according to the method described in claim 1, wherein, via described in broadcast message or radio resource control RRC message sink The information of total peak power output.

4. according to the method described in claim 1, this method is further comprising the steps of:

Before checking step, for each component carrier, control is at least one channel of transmission simultaneously as follows Power is sent, which is so that total transmission power of at least one channel is matched no more than for corresponding component carrier The maximum transmission power set.

5. a kind of for controlling the communication equipment of the transmission of signal in the wireless communication system for supporting multiple component carriers, this is logical Believe that equipment includes:

Inspection unit, the inspection unit are configured to check for the multiple channels being used for while sending on the multiple component carrier Total transmission power whether be more than total peak power output for the communication device configured,

Unit is lost, this is lost unit and is configured as: if the multiple channel on the multiple component carrier is described total Send power be more than for the communication device configured total peak power output, then lose the transmission of the SRS.

6. communication equipment according to claim 5, the communication equipment further include:

Radio frequency unit, the RF unit are configured as sending institute on the second component carrier wave in the multiple component carrier State PUSCH.

7. communication equipment according to claim 5, wherein via broadcast message or radio resource control RRC message sink The information of total peak power output.

8. communication equipment according to claim 5, the communication equipment further include:

Control unit, the control unit are configured as: before inspection, for each component carrier, control is used for as follows Simultaneously send at least one channel transmission power, which be so that total transmission power of at least one channel not Power is sent more than for the maximum of corresponding component carrier configuration.