CN102474830A - Method and apparatus for controlling uplink power in a wireless communication system - Google Patents

Abstract

A method and apparatus for controlling uplink transmit power in a wireless communication system are disclosed. The method includes determining an uplink transmit power for each of the plurality of transmission channels, and sequentially allocating the determined uplink transmit powers to the transmission channels in a descending order of predetermined priority levels of the transmission channels, within a maximum available transmit power of the user equipment. The priority levels of the transmission channels are predetermined so that control channels, a sounding channel, a data channel, and a bandwidth request channel have priority levels in a descending order.

Description

Be used for method and apparatus at wireless communication system control up-link power

Technical field

The present invention relates to radio communication, and relate more specifically to a kind of method that is used for side by side being sent time control up link (UL) transmitted power at a plurality of UL transmission channels.

Background technology

Recently the next generation multimedia wireless communication system in active research field need be handled except the various types of information that comprise video data and wireless data of tradition towards the service of voice with high data rate.

Because the advantage of its high data rate, OFDM (OFDM) has attracted many concerns recently.OFDM is the special circumstances of multi-carrier modulation (MCM), is divided into a plurality of orthogonal sub-carriers and data are sent out at the OFDM midband on these subcarriers.The low-complexity of OFDM has reduced intersymbol interference.In OFDM, the input serial sequence of data symbol is converted into N parallel data symbol and on N independent subcarrier, sends.

Keep orthogonality among the subcarrier in frequency domain.The increase that each orthogonal channel all experiences separate frequency selective fading and resulting gap between the symbol that is sent has caused minimum inter-symbol interference.OFDM (OFDMA) is the multiple access scheme, and wherein each user of the part through available subcarrier in the ofdm system independent allocation allows a plurality of accesses.In OFDMA, usually independently frequency resource (being subcarrier) is distributed to a plurality of users with frequency resource such mode that do not overlap each other.As a result, be exclusive each other being distributed among the user of OFDMA medium frequency resource.The OFDMA system can realize the frequency diversity for a plurality of users through frequency selective scheduling, and according to subcarrier permutation allocation of subcarriers in every way.

In some wireless communication systems, control signal can be different from the UL data channel that data is carried to BS from UE physically from the UL control channel that subscriber equipment (UE) is carried to base station (BS).Can in a symbol, send a plurality of control channels and/or data channel.Can use predetermined mathematical formulae (math figure) to confirm the transmitted power of each UL transmission channel.

Generally speaking, wait the predetermined maximum available transmit power of UL transmission according to the throughput of the bandwidth of distributing to UE, UE, the battery performance of UE for UE.Therefore, if send the maximum available transmit power that the needed total transmitted power of a plurality of transmission channels surpasses UE, then UE maybe not can successfully sends said a plurality of transmission channel.

Therefore, need be for a kind of method that is used for effectively transmit power assignment is given a plurality of UL transmission channels that will side by side send at different physical regions.

Summary of the invention

Technical problem

The method and apparatus that the objective of the invention is to be used for transmit power assignment is given a plurality of UL transmission channels that will side by side send that is designed to address this problem.

What one of skill in the art will appreciate that is; Utilize the attainable purpose of the present invention to be not limited to hereinbefore to have described especially, and will more be expressly understood the present invention attainable above and other purpose according to the following specifically describes of combining that accompanying drawing carries out.

Technical scheme

The object of the invention can realize that this method comprises through the method that is provided in wireless communication system controlling at the subscriber equipment place up-link transmit power of a plurality of transmission channels: at the maximum available transmit power (P of subscriber equipment _MAX) in the one or more transmission channels among a plurality of transmission channels are confirmed up-link transmit power; And come side by side to send said one or more transmission channel with in the up-link transmit power that said one or more transmission channels are confirmed each; Wherein, Other descending order of predetermined priority level with transmission channel is confirmed up-link transmit power, and priority-level is scheduled to so that control channel, sounding channel, data channel and bandwidth request channel have the priority-level according to descending order.

In another aspect of this invention, provide the subscriber equipment that is used at the up-link transmit power of a plurality of transmission channels of wireless communication system control in this article, this subscriber equipment comprises: transmitter, and said transmitter is configured to send signal; And processor, said processor is configured to control said transmitter, and wherein, said processor is configured at the maximum available transmit power (P of the subscriber equipment of subscriber equipment _MAX) in the one or more transmission channels among a plurality of transmission channels are confirmed up-link transmit power; And be configured to come side by side to send said one or more transmission channel with the up-link transmit power that said one or more transmission channels are confirmed; Wherein, Said processor is configured to confirm up-link transmit power with other descending order of predetermined priority level of transmission channel, and priority-level is scheduled to so that control channel, sounding channel, data channel and bandwidth request channel have the priority-level according to descending order.

Can be with to transmission channel C ₁To C _kThe up-link transmit power P that confirms _C1To P _CkCome side by side to send the transmission channel C that satisfies the expressed condition of following equality among a plurality of transmission channels ₁To C _k,

$\underset{i=1}{\overset{k}{\mathrm{\Σ}}}{P}_{\mathrm{Ci}}\≤P_{\mathrm{MAX}}$

Wherein, k is the maximum integer that satisfies said condition, C _iThe transmission channel that expression has the i priority-level, P _CiExpression is to transmission channel C _iThe up-link transmit power of confirming.

Method according to claim 3, wherein, together with transmission channel C ₁To C _kTogether, said forwarding step side by side sends the transmission channel C with (k+1) priority-level with the up-link transmit power that calculates through following equality _K+1,

$P_{C_{k+1}}=P_{\mathrm{MAX}}-\underset{i=1}{\overset{k}{\mathrm{\Σ}}}{P}_{\mathrm{Ci}}$

If have the transmission channel C of (k+1) priority-level _K+1Be control channel, then can only send transmission channel C ₁To C _k

If have the transmission channel C of (k+1) priority-level _K+1Be data channel, then can be together with transmission channel C ₁To C _kTogether, send transmission channel C with the up-link transmit power that calculates through following equality _K+1,

$P_{C_{k+1}}=P_{\mathrm{MAX}}-\underset{i=1}{\overset{k}{\mathrm{\Σ}}}{P}_{\mathrm{Ci}}$

Beneficial effect

Be used for according to the present invention suitably distributing the method and apparatus of UL transmitted power to make UE can stably send a plurality of UL signals.

What one of skill in the art will appreciate that is, utilizes the attainable effect of the present invention to be not limited to have described especially hereinbefore, and will more be expressly understood other advantage of the present invention according to the following specifically describes of combining that accompanying drawing carries out.

Description of drawings

The included accompanying drawing to further understanding of the present invention that provides illustrates embodiments of the invention, and is used for explaining principle of the present invention with this description.

In the accompanying drawings:

Fig. 1 is the block diagram of wireless communication system.

Fig. 2 is the block diagram that is used to realize subscriber equipment of the present invention (UE) and base station (BS).

Fig. 3 is the block diagram of the transmitter in each among UE and the BS.

Fig. 4 illustrates the exemplary frame structure in the wireless communication system.

Fig. 5 illustrates control channel and the exemplary allocations of communication resources of data channel in the distributed logic Resource Unit (LRU) of the frequency division (frequency partition) in up link (UL) subframe.

Fig. 6 illustrates the exemplary allocations of communication resources of the transmission channel in the physical resource unit (PRU) in the UL subframe.

Fig. 7 is the flow chart that diagram is used for distributing according to embodiments of the invention the method for UL transmitted power.

Fig. 8 is the flow chart that diagram is used for distributing according to another embodiment of the present invention the method for UL transmitted power.

Fig. 9 is the flow chart that diagram is used for distributing according to another embodiment of the present invention the method for UL transmitted power.

Embodiment

To carry out detailed reference to the preferred embodiments of the present invention now, the example of these preferred embodiments is illustrated in the accompanying drawings.

Fig. 1 is the block diagram of wireless communication system.

With reference to figure 1, wireless communication system 10 comprises at least one base station (BS) 11.Each BS 11 provides communication service to the subscriber equipment (UE) 12 in specific geographic area (so-called sub-district) 15a, 15b or the 15c that are covered by BS 11.The sub-district can be divided into a plurality of zones that are called the sector further.UE 12 sends to BS 11 and moving or permanent plant from BS 11 receiving subscriber datas and/or control information with user data and/or control information.Term " UE " can with exchanges such as term " mobile radio station (MS) ", " portable terminal (MT) ", " user terminal (UT) ", " subscriber station (SS) ", " wireless device ", " PDA(Personal Digital Assistant) ", " radio modem ", " handheld device ".The fixed station that BS 11 normally communicates with UE 12 and/or another BS 11.Therefore, BS 11 and UE 12 and/or another BS 11 swap datas and control information.Term " BS " can exchange ground with term " Node B of evolution (eNB) ", " base transceiver systems (BTS) ", " access point (AP) " etc. and use.

Down link (DL) refers to the communication link that is directed to UE 12 from BS 11, and up link (UL) refers to the communication link that is directed to BS 11 from UE 12.Transmitting apparatus is the fixing and/or mobile node that is used to provide data, services or voice service, and receiving equipment is the fixing and/or mobile node that receives data, services or voice service.Transmitting apparatus can be the part of BS 11 and receiving equipment can be the part of UE 12 on DL, but transmitting apparatus can be the part of UE 12 and receiving equipment can be the part of BS 11 on UL.

Use wireless communication system of the present invention and be not limited to any specific multiple access scheme.Therefore, various multiple access schemes are available to the wireless communication system such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA) and OFDM (OFDMA).

Fig. 2 is the block diagram that is used to realize UE 12 of the present invention and BS 11.

Narrate like the front, UE 12 serves as the transmitting apparatus on the UL and serves as the receiving equipment on the DL.BS 11 can serve as the receiving equipment on the UL and serve as the transmitting apparatus on the DL.

UE 12 and BS 11 comprise: antenna 500a and 500b, and it is used to send and receive information, data, signal and/or message; Transmitter 100a and 100b, it is used for sending message through antenna 500a and 500b; Receiver 300a and 300b, it is used for receiving message through antenna 500a and 500b; And memory 200a and 200b, it is used for storing the information that is associated with the communication of wireless communication system.UE 12 and BS 11 also comprise processor 400a and 400b respectively, and said processor 400a and 400b are suitable for comprising that through control the UE 12 of transmitter 100a and 100b, receiver 300a and 300b and memory 200a and 200b and the parts of BS 11 carry out the present invention.Transmitter 100a, memory 200a, receiver 300a and processor 400a can be configured to the individual components on independent chip, and perhaps their independent chip can be integrated in the single chip among the UE 12.Likewise, transmitter 100b, memory 200b, receiver 300b and processor 400b can be configured to the individual components on independent chip, or their independent chip can be integrated in the single chip among the BS 11.

Antenna 500a and 500b aloft send from the signal of transmitter 100a and 100b generation, and the external wireless signals that perhaps will aloft receive outputs to receiver 300a and 300b.If transmitter 100a and 100b and receiver 300a and 300b are implemented in the transport module and receiver module of the multiple-input and multiple-output (MIMO) of supporting a plurality of antennas of use, then each in them can be connected to two or more antennas.

Processor 400a and 400b provide overall control to the module of UE 12 and BS 11 usually.Especially, processor 400a and 400b can carry out be used to carry out controlled function of the present invention, based on media interviews control (MAC) frame conversion and control function of service characteristic and communication environments, the electricity-saving function that is used to control idle mode operations, handoff functionality and authentication and encryption function.Processor 400a and 400b can also be known as controller, microcontroller, microprocessor, microcomputer etc. Processor 400a and 400b can be made up by hardware, firmware, software or its and realize.In Hardware configuration; Processor 400a and 400b can be provided with one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD) and/or field programmable gate array (FPGA), to be used to realize the present invention.In firmware or software arrangements, firmware or software can be configured to comprise the module of carrying out function of the present invention or operation, process, function etc.This firmware or software can be arranged among processor 400a and the 400b, perhaps can be stored among memory 200a and the 200b and by processor 400a and 400b to call from memory 200a and 200b.

Transmitter 100a and 100b to being encoded by the transmission signals of processor 400a and 400b scheduling and/or data and modulate, and send signal and/or data after modulating through antenna 500a and 500b with predictive encoding and modulation scheme.In addition, transmitter 100a and 100b convert transmitting data stream to K signal flow through demultiplexing, chnnel coding, modulation etc.After being processed in the transmission processor of transmitter 100a and 100b, sends a said K signal flow through antenna 500a and 500b.

Fig. 3 is the block diagram of the transmitter in each among UE 12 and the BS 11.With reference to figure 3, will carry out quite detailed description to the operation of transmitter 100a and 100b hereinafter.

With reference to figure 3, each among transmitter 100a and the 110b comprises encoder 110, precoder 120, subcarrier mapper 130-1 to 130-K, OFDM (OFDM) signal generator 140-1 to 140-K and N _tIndividual transmitting antenna 500-1 to 500-N _t

Encoder 110 is encoded into coded data with the predictive encoding scheme with transmitting data stream, and the symbol of the position of the data map after will encoding with predetermined modulation schemes to the expression signal planisphere (signal constellation).Modulation scheme can be but be not limited to any one in m phase phase shift keying (m-PKS) and the m quadrature amplitude modulation (m-QAM).For the data behind the modulating-coding, encoder 110 can have independently modulation module.Simultaneously, encoder 110 can define the layer of incoming symbol, makes precoder 120 can the antenna special symbol be distributed to predetermined antenna-path.Layer refers to the information path that leads to precoder 120, and the information path before precoder 120 can be called as virtual-antenna or layer.For the layer of define symbol, encoder 110 can be provided with and be configured to the independently layer mapper of module.

Precoder 120 is according to relating to transmitting antenna 500-1 to 500-N _tThe MIMO scheme handle received symbol, therefore and the antenna special symbol is outputed to subcarrier mapper 130-1 to 130-K.Precoder 120 is responsible for MIMO stream is mapped to antenna 500-1 to 500-N _tParticularly, precoder 120 multiply by N with the output of encoder 11 _tXM _tPre-coding matrix W.The output of precoder 120 can be represented as N _tXN _FMatrix z.

$z=\mathrm{Wx}=\left[\begin{array}{cccc}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="HDA0000130752920000031.png,HDA0000130752920000051.png"\; state="\{\{state\}\}">z</figure-callout>}}_{\mathrm{1,1}}& z_{\mathrm{1,2}}& ...& z_{1,N_F}\\ z_{\mathrm{2,1}}& z_{\mathrm{2,2}}& ...& z_{2,N_F}\\ ...& ...& ...& ...\\ z_{N_t,1}& z_{N_t,2}& ...& z_{N_t,N_F}\end{array}\right]$

Wherein, N _tThe quantity of expression transmitting antenna, z _{J, k}The indicate symbol that on the k subcarrier, sends through the j physical antenna.The matrix that pre-coding matrix W can send to UE, in presetting code book, comprise with signal through BS can optionally be confirmed in presetting code book according to resource index, the DL reference signal that maybe can be suitable for estimating and be selected or calculate.Replacement is the predefine pre-encoder matrix between BS and UE, and UE can be provided with pre-encoder matrix independently, makes precoder export and becomes the stream that is used for the single virtual transmitting antenna.

Subcarrier mapper 130-1 to 130-K distributes to the antenna special symbol suitable subcarrier and carries out multiplexing according to the user to them.Ofdm signal generator 140-1 to 140-K modulates the output OFDM symbol through making the antenna special symbol stand OFDM.Ofdm signal generator 140-1 to 140-K can be inserted in the resulting IFFT time-domain symbol to antenna special symbol execution inverse fast Fourier transform (IFFT) and with Cyclic Prefix (CP).The OFDM symbol is through transmitting antenna 500-1 to 500-N _tSend.

Receiver 300a and 300b decode and demodulation to the wireless signal that aloft receives through antenna 500a and 500b, and demodulated signal is outputed to processor 400a and 400b.Each antenna 500a or the 500b that is connected among receiver 300a and the 300b can comprise N reception antenna.After multiplexing and channel demodulation, the signal that receives through corresponding reception antenna is downconverted into baseband signal and is resumed into transmitter 100a or the original data stream of 100b transmission.Therefore, each among receiver 300a and the 300b can have be used for the signal that receives be downconverted into baseband signal the signal restorer, be used for channel demodulator that baseband signal is carried out multiplexing multiplexer and is used for the signal flow after multiplexing is demodulated to data flow.Signal restorer, multiplexer and channel demodulator can be configured to independent module or be integrated in the individual module.

In mimo system, be converted into a plurality of signal flows according to the grouping of how many codings, transmitter 100a and 100b can operate with two kinds of patterns, that is, and single codeword (SCW) pattern and many code words (MCW) pattern.In the SCW pattern code word send through a plurality of layers and no matter the quantity of layer how, yet code word is sent through in a plurality of layers each in the MCW pattern.Because receiver uses the Cyclic Redundancy Check of code word whether to confirm this code word by successfully demodulation to each code word in the MCW pattern, so receiver can be realized extra gain through handling such as the reception of interference eliminated.Therefore, except that demodulation, channel-decoding and Multiplexing module, each among receiver 300a and the 300b may further include the interference eliminator that is used to eliminate interference, if it is operated in the MCW pattern.

Memory 200a and 200b can storage of processor 400a and the signal processing of 400b with the needed program of control and temporarily store input and output information.For example, the memory 200a of UE 12 can store from BS 12 being used for of receiving and confirm the parameter of up-link power or the information of describing after a while about the priority-level of UL transmission channel.Each can be implemented as memory 200a and 200b in flash-type storage medium, hard disk type storage medium, the miniature storage medium of multimedia card, card type memory (for example, secure digital (SD) or eXtreme numeral (XS) memory), random-access memory (ram), read-only memory (ROM), EEPROM (EEPROM), programmable read-only memory (prom), magnetic memory, disk or the CD.

Fig. 4 illustrates the exemplary frame structure in the wireless communication system.

Among the frame structure that can use wireless communication system, time division duplex (TDD) frame structure is illustrated among Fig. 4.In TDD, UL signal and DL signal are sent out at the different time point, share identical frequency.

With reference to figure 4, the trunnion axis of frame is a chronomere with the OFDMA symbolic representation, and the vertical axis of frame number is expressed as cps with logical sub-channel.Frame is divided into the data sequence channel, and this data sequence channel has the duration scheduled time of the physical characteristic that depends on them.That is to say that a frame comprises DL subframe and UL subframe.Reception/transmission change gap (RTG) is inserted between the frame, is inserted between DL subframe and the UL subframe and send/receive change gap (TTG).That the DL subframe can comprise is leading, frame control head portion (FCH), DL-MAP, UL-MAP and one or more DL data burst (data burst).The UL subframe can comprise range channel, feedback channel, reply (ACK) channel and one or more UL data burst.

Leading is the predetermined sequence that in first symbol of each frame, carries.The estimation and the channel estimating of the obtaining of the initial synchronisation between leading BS of being used for and the UE, Cell searching, frequency shift (FS).The length and the encoding scheme of FCH regulation DL-MAP message.DL-MAP and UL-MAP are used for controlling (MAC) message to the media interviews of UE notice DL and UL channel resource allocating.The DL-MAP message definition to the visit of DL channel, comprise the downlink channel descriptor (DCD) of the characteristic of describing the DL physical channel.The UL-MAP message definition to the visit of UL channel, comprise the uplink channel descriptor (UCD) of the characteristic of describing the UL physical channel.BS sends DCD and sends UCD through UCD message cycle property ground through DCD message cycle property ground.

Data burst is the data cell of carrying the data from BS to UE or from UE to BS.A data burst can take one or more continuous subframes.Subframe comprises that a plurality of symbols and its type classify according to the quantity of the symbol in this subframe.The Class1 subframe comprises 6 symbols, and type 2 subframes comprise 7 symbols, and type 3 subframes comprise 5 symbols, and type 4 subframes comprise 9 symbols.The UL subframe is transmitted UL control signal and UL data.For the UL transmission, UL control channel and UL data channel have been distributed.As the UL control channel, there are fast feedback channel (FBCH), bandwidth request channel (or BW REQ channel), mix automatic repeat requests (HARQ) feedback channel, sounding channel (sounding channel) and range channel.There are two types main FBCH of FBCH:UL (PFBCH) and the auxiliary FBCH (SFBCH) of UL.PFBCH carries broad-band channel quality indicator (CQI) and MIMO feedback information, yet SFBCH carries arrowband CQI and MIMO feedback information.Broadband request channel is used for the radio resource that the UE request is used for the transmission of UL data or UL control signal.The HARQ feedback channel carries the response to the DL transfer of data, and ACK/ negates ACK (ACK/NACK).Sounding channel is used for BS and confirms that the UL channel response is to be used for the purpose of transmission of UL closed-loop MIMO and UL scheduling.It is synchronous that range channel is used for UL.Range channel further is classified as range channel that is used for synchronous UE and the range channel that is used for asynchronous UE.The range channel that is used for asynchronous UE is used to initial the access and switching.The range channel that is used for synchronous UE is used to the cycle range finding, is also referred to as the cycle range channel.The UE that has been synchronized to target BS carries out tracking to keep being synchronized to target BS through sending the cycle distance measuring signal.

UE can send the control information about above-mentioned control channel, such as ACK/NACK, CQI, pre-coding matrix index (PMI), bandwidth request (BR), dispatch request and detectable signal.

Fig. 5 illustrates control channel and the exemplary allocations of communication resources of data channel in the distributed logic Resource Unit (LRU) of the frequency division in the UL subframe.

From Fig. 5, be noted that; Carry the feedback channel of UL feedback signal, the data channel that carries the bandwidth request channel of UL bandwidth request signal and carry the UL data is distinguishing each other, and can in a symbol, side by side sends UL control signal and UL data.

Fig. 6 illustrates the exemplary allocations of communication resources of the transmission channel in the physical resource unit (PRU) in the UL subframe.Through the mode of example, the UL subframe is shown to have 6 Symbol Type 1 subframes.

Be assigned to detectable signal under the situation of UL subframe at data A, B and C, detectable signal takies an OFDMA symbol in the UL subframe.No matter the type of UL subframe how, survey first symbol that symbol is arranged in the UL subframe.Each UL subframe can both comprise only detection symbol.For 6 symbol PRU, remaining 5 symbols are formed for 5 symbol PRU of the transmission of data C.

As for the transmission of data A, UE can be modified as and has 7 Symbol Type 2 subframes so that send data A having 6 Symbol Type 1 subframes.Particularly, when the PRU that does not have sounding channel and PRU with sounding channel were assigned to UE, UE can be modified as the subframe type of the PRU that does not have sounding channel the PRU with sounding channel and in amended PRU, send data A.Yet, in first symbol, have under the situation of Class1 subframe of pilot signal, if it is not enough to be used for the transmitted power of first symbol, the channel estimating performance of basic allocation unit (basic allocation unit) will reduce probably.In order to address this problem, in PRU, do not carry detectable signal, with survey the identical symbol of symbol and can be exclusively used in pilot transmission or be perforated (puncture), rather than change the subframe type of PRU.

Use description to calculate the method for transmitted power of the needs of UL transmission channel now.

For the transmission of UL control signal and UL data, needed transmitted power is assigned to UL control channel and UL data channel.

Up-link power control is supported in the initial calibration (initial calibration) and the periodic Control of transmitted power under the situation that does not have loss of data.The transmitted power that the up-link power control algolithm is confirmed each symbol with to path loss, cover and fast decline compensate.And up-link power control is intended to control the presence of intercell interference rank.

For power control, mainly there are two kinds of schemes: open Loop Power control (OLPC) and closed power control (CLPC).CLPC is the power control scheme that wherein increases or reduce the transmitted power of UE 12 according to the Direct Power increase/minimizing message that receives from BS 11.Compare with CLPC, OLPC is that wherein UE 12 comes to confirm by oneself the power control scheme of its transmitted power based on the parameter that receives from BS 11 rather than from the Direct Power increase/minimizing order of BS 11.For example, BS 11 sends to UE 12 with power control information, and UE 12 controls its up-link power based on this power control information then.

UE 12 can confirm the transmitted power of each subcarrier and each stream through following equality.

Mathematical formulae 1

[mathematical expression 1]

P (dBm)=L+SINR _Target+ NI+ skew

Wherein, L representes by UE in computing average down link propagation loss preset time, comprises transmit antenna gain and the path loss of UE.UE can calculate down link propagation loss L based on the gross power of the activation subcarrier that carries frame preamble (active subcarrier).In addition, UE can use another downlink reference signal to calculate down link propagation loss L.And many other methods can be used for calculating down link propagation loss L.SINR _TargetThe target SINR of expression UE.Confirm that target SINR parameters needed can send to UE with signal through BS, perhaps can be with predetermined value as SINR _TargetUnder the situation of the Channel Transmission except initial ranging and probe transmission; UE can be based on the target SINR that is set for transmission channel like the target SINR parameter the table 1 that receives from BS; The target SINR of the transmission channel of confirming to list in the table 1, UE can use the target SINR parameter that receives from BS to confirm the target SINR of other transmission channel through [mathematical formulae 2] simultaneously.

Table 1

[table 1]

Mathematical formulae 2

[mathematical expression 2]

$10\log 10\left(\max (10^\left(\frac{{\mathrm{SINR}}_{\mathrm{MIN}}\left(\mathrm{dB}\right)}{10}\right),{\mathrm{\&gamma;}}_{\mathrm{IoT}}\&times;{\mathrm{SIR}}_{\mathrm{DL}}-\mathrm{\&alpha;})\right)-\mathrm{\&beta;}\&times;10\log 10\left(\mathrm{TNS}\right)$

Wherein, SINR _MIN(dB) expression is for the SINR requirement of the desired minimum-rate of BS, and just, improvement is at the needed minimum SINR of performance of the UE at cell edge place, and γ _IoTBe that fairness and interference plus noise are than thermal noise (IoT) controlling elements (a fairness and interference plus noise over thermal noise control factor).SIR _DLBe by the DL signal of UE measurement and the linear ratio of interference power.α is the factor based on the quantity of the reception antenna of BS of being sent with signal by MAC power control signaling, and β is confirmed and indicating whether of sending used the stream factor of the total quantity (TNS) of stream by BS.TNS representes the total quantity by the stream among the LRU of UL-MAP information indication.TNS can unicast to UE through BS.

In [mathematical formulae 1], NI (dBm) representes the noise of each subcarrier and the estimation average power level of interference, and it calculates based on the IoT that receives from BS (dB) through [mathematical formulae 3].

Mathematical formulae 3

[mathematical expression 3]

NI＝P _TN+IoT+10log10(Δf)

Wherein, P _TNThermal noise power density when being illustrated in 0 ℃, Δ f representes subcarrier spacing, and the UL noise that IoT representes to be broadcast to the UE in the overlay area of BS by BS with disturb rank.All UL noises are turned to the IoT rank from 0dB to 63.5dB with the interference rank with the 0.5dB step-size amounts.

In [mathematical formulae 1], skew expression BS has confirmed and has sent to the UE certain power skew of UE.

For initial ranging, UE is sending the initial ranging sign indicating number on the range channel at random.The initial transmission power of range channel is confirmed based on the signal strength signal intensity that the receives indication (RSSI) that UE measures.If UE fails to receive the response to initial ranging, then it can increase the predetermined unit rank with transmitted power, and sends new initial ranging sign indicating number with the power rank that is increased.

Because power control supports sounding channel with the management detection quality, so control individually the UE transmitted power that is used for the UL sounding channel according to its target SINR that is used for the UL sounding channel.The power of each subcarrier is kept is used for the UL sounding channel, like what calculate through [mathematical formulae 1].In [mathematical formulae 1], SINR _TargetBe the target SINR of sounding channel, its basis is by parameter S IR _DLThe DL signal-to-jamming ratio (SIR) of the UE of definition is provided with.In order to keep the UL detection quality, distribute different target SINR values according to the DL SIR of each UE.For example, the UE with high DL SIR uses high relatively target SINR, and has the low relatively target SINR of UE application of low DL SIR.

The SINR of sounding channel _TargetCan use the parameter that sends in the message of UE by BS to calculate according to [mathematical formulae 2].

Hereinafter the method that is used to distribute the UL transmitted power according to an embodiment of the invention will be described.

In different systems, UE has different maximum available transmit power P _MAXUE should be at its maximum available transmit power P _MAXThe interior transmitted power of confirming each channel.If by the transmitted power of the transmission channel that side by side sends and surpass maximum available transmit power P _MAX, then ul transmissions possibly failed.Especially when will dissimilar transmission channels during identical transmission intercal distributing to UE being used for transmission, and so this UE should be at maximum available transmit power P _MAXIn when confirming the transmitted power of each transmission channel, the bust this of transmission channel changes the type of the relevant failure rate of the transmitted power of the influence of overall wireless communications system and transmission channel with transmission channel.Therefore, the bust this of transport channel and fault quality and stable aspect possibly influence radio communication more unfriendly than the bust this and the fault of other transmission channel.

Under this background, the invention provides the method that the transmitted power, type, importance and the transmission plan that are used for according to them come the prioritized transmission channel and the UL transmit power assignment given transmission channel according to their priority-level.

UE with the transmitted power of antenna be no more than maximum available transmit power P _MAXSuch mode is calculated the transmitted power of each antenna through power control equality (equation).

The power of each stream and each transmission channel calculates as follows through [mathematical formulae 1].Through the mode of example, the precoder that is used for control channel is defined as [mathematical formulae 4] and [mathematical formulae 5] respectively with the precoder that is used for data channel.

Mathematical formulae 4

[mathematical expression 4]

Wherein, N _tThe quantity of expression transmitting antenna, M _tThe quantity of expression stream, and w _{I, control _ j}Expression control channel precoder W _{Control _ j}The i component, it multiply by the i antenna of j control channel.

Mathematical formulae 5

[mathematical expression 5]

Wherein, N _tThe quantity of expression transmitting antenna, M _tThe quantity of expression stream, and w _{I, j}Expression data channel precoder W _Data(it multiply by the i antenna of j stream for i, j) component.

The gross power of n control channel is confirmed by following mathematical formulae aspect priority

Mathematical formulae 6

[mathematical expression 6]

Wherein, k is the index of the resource sub-carriers of being distributed, and it is enrolled again indexes from 0 to (N _{Subcarrier _ control}-1) scope.N _{Subcarrier _ control}It is the total quantity of allocation of subcarriers in frequency.P _{TX_ control _ n}Expression is through each subcarrier of the n control channel of [mathematical formulae 1] calculating and the power of each stream.

The power rank of each subcarrier of sounding channel is maintained the value of calculating through [mathematical formulae 1].Therefore, the gross power of sounding channel can be expressed as

Mathematical formulae 7

[mathematical expression 7]

Wherein, N _{Subcarrier _ detection}Expression divides the total quantity of the subcarrier that is used in detection.

The gross power of i data channel can be confirmed by following mathematical formulae aspect priority.

Mathematical formulae 8

[mathematical expression 8]

Wherein, k is the index of the subcarrier in the resource of being distributed, and it is enrolled again indexes from 0 to (N _{Subcarrier _ control}-1) scope.N _{Subcarrier _ data}It is the total quantity of the subcarrier that distributed.P _{TX_ data _ i}Expression is through each subcarrier of the i data channel of [mathematical formulae 1] calculating and the power of each stream.

Give according to their predetermined priority level allocation the UL transmission channel the UL transmitted power with should be at the maximum available transmit power P of UE _MAXIn, it is represented as

Mathematical formulae 9

[mathematical expression 9]

P _{TX_ is total}=min (P _MAX, P _{Always _ control _ 1}+ ... + P _{Always _ survey}+ P _{Always _ data _ 1}+ ...)

For instance, with the priority-level that describes transmission channel in detail.

According to embodiments of the invention, the such mode of control channel, sounding channel and data channel that priority-level gives except bandwidth request channel and sounding channel is come the prioritized transmission channel with descending order.The example of this priorization after a while reference table 2 to table 6 is described.For the cause of describing easily, the control channel except bandwidth request channel and sounding channel will be called " control channel " simply.

Consider the type of control channel, table 2 to table 7 illustrates the exemplary priorization of UL transmission channel.

Table 2

[table 2]

Channel type
	The HARQ feedback
PFBCH/SFBCH
	Synchronous range finding
Survey
	Data
Bandwidth request

Reference table 2, the type of UL transmission channel is classified as data channel and control channel, and then according to their purpose control channel is classified.Usually, for example, the UL data have retransmission opportunity through link adaptation or HARQ, but for control signal, do not have retransmission opportunity, because HARQ is not suitable for control signal.Therefore, be necessary to give the priority that control channel is higher than data channel.

The something that will note among this paper is that a plurality of retransmission opportunity are available to the bandwidth request channel, because can send bandwidth request in every way.If UE fails to receive the ACK of bandwidth request to its transmission from BS, then UE can be for example retransmits to BS through access at random, bandwidth request signaling head, incidentally bandwidth request (piggybacked bandwidth request) or FBCH with bandwidth request.The access bandwidth request can be sent on the bandwidth request channel under the situation that lacks feedback signal and the data-signal that will send at random.Bandwidth request signaling head can be used as the response of the ACK that is directed against bandwidth request header that receives from BS is sent.When sending bandwidth request, exist under the data conditions, data with bandwidth request by incidentally.If when sending bandwidth request, have the quick feedback signal that to send, then can on PFBCH, bandwidth request be sent to BS.Although the bandwidth request channel is a kind of control channel basically, it is given minimum priority in table 2 to table 5, because a plurality of repeating method and chance are available to the bandwidth request channel.

Reference table 2; Improve for the HARQ of transmission efficiency of packet data through the quantity that reduces the repeat requests from UE to BS for being intended to; It is necessary carrying as the HARQ feedback channel to the ack/nack signal of the response of DL transfer of data, and the HARQ channel is given limit priority.

PFBCH/SFBCH carries CQI, Space Time Coding (STC) rate indicator, PMI etc.Owing in DL scheduling, DL user's selection and resource allocation, relate to PFBCH/SFBCH, aspect priority so PFBCH/SFBCH is placed in after the HARQ feedback channel.

Under the synchronous situation of the UL of failure, BS can not discern UE, this make normal resource allocation with follow-up communicate by letter impossible.In case UE is synchronized to particular B S, UE just need follow the tracks of to keep synchronous through the cycle distance measuring signal being sent to BS.Therefore, the synchronous range channel that is used for maintaining between UE and the BS has high priority level.

Obtained UL synchronously after, UE sends to BS with detectable signal.BS uses this detectable signal to estimate the UL channel quality and therefore carries out user's selection and resource allocation then.Consider that UE should keep being synchronized to target BS stably detectable signal is sent to target BS, the sounding channel that carries this detectable signal is given the priority-level lower than synchronous range finding channel.

As described above, although bust this, data have retransmission opportunity.Therefore, data channel is all lower than in HARQ feedback channel, PFBCH/SFBCH, synchronous range finding channel and the sounding channel any one aspect priority.

Table 3

[table 3]

Channel type
	The HARQ feedback
Synchronous range finding
	PFBCH/SFBCH
Survey
	Data
Bandwidth request

Reference table 3 will give HARQ feedback channel, sounding channel, data channel and bandwidth request channel with the identical priority-level shown in the table 2.According to the UL transmission channel of table 3 based on they renewal period and their importance and retransmission opportunity and by priorization.When PFBCH/SFBCH was updated in short time interval, this priorization was suitable for.In this case, although the bust this of PFBCH/SFBCH, the re-transmission of next time upgrading immediately quick feedback information of PFBCH/SFBCH brings influence.Here it is why synchronous range channel have the reason of the priority that is higher than PFBCH/SFBCH.

Table 4

[table 4]

Channel type
	PFBCH/SFBCH
Synchronous range finding
	The HARQ feedback
Survey
	Data
Bandwidth request

Reference table 4, although HARQ feedback is important, when UE failed to send the ack/nack signal to the DL data, BS can handle through NACK and retransmit the DL data.Therefore, the HARQ feedback channel has low priority level in table 4.

Table 5

[table 5]

Channel type
	PFBCH/SFBCH
Synchronous range finding
	Survey
The HARQ feedback
	Data
Bandwidth request

Reference table 5, detectable signal are used for BS and confirm the UL channel response.Inaccurate detectable signal possibly influence transmission of UL closed-loop MIMO and UL scheduling unfriendly.Consider the importance of detectable signal transmission accurately; The priority that BS will be higher than HARQ feedback channel (it has been given low priority level) gives sounding channel; Because can retransmitting the DL of previous transmission, BS divides into groups, even it does not receive the HARQ feedback of dividing into groups for DL.Yet, because detectable signal should be synchronized transmission, so that the priority-level of sounding channel is configured to is lower than the priority-level of synchronous range finding channel.

Table 6

[table 6]

Channel type
	PFBCH/SFBCH
The HARQ feedback
	Synchronous range finding
Survey
	Data
Bandwidth request

Reference table 6, the bust this of HARQ feedback causes data re-transmission.The increase of retransmission number means and should be data Resources allocation continuously.Therefore, the resource of minimizing can be assigned to the new grouping that is used for new user, and this possibly cause the performance of overall wireless communications system to reduce.In table 6; Consider the probability of data re-transmission; The HARQ feedback channel is configured to lower than PFBCH/SFBCH aspect priority, but owing to the problem that possibly caused by the continuous failure of HARQ feedback transmission, aspect priority, is configured to higher than synchronous range finding channel.

Though reference table 2 to table 6 has been described and has been given the bandwidth request channel with minimum priority; But what can further expect is; When bandwidth request was urgent, any one priority that will be higher than in HARQ feedback channel, PFBCH/SFBCH, synchronous range finding channel, sounding channel and the data channel gave the bandwidth request channel.

The system that depends on UE and BS realizes or whole wireless communications environment and state, can give data with high relatively priority-level.Table 7 illustrates the example of the prioritization data that is higher than the up link relevant information in the system.

Table 7

[table 7]

Channel type
	PFBCH/SFBCH
Data
	The HARQ feedback
Synchronous range finding
	Survey
Bandwidth request

In the above example of priorization; Can be further be that whether initial transmission packet or retransmission packet, data have cycle business model (periodic traffic pattern) and fixing payload size and whether the distribution that continues is applied to data so that reduce the assignment overhead that is used to be connected or whether set of dispense (group allocation) is applied to data and (that is to say according to MCS rank, data; For example whether data are used for ip voice (VoIP)), come data are carried out further priorization.Alternatively, the power that equates can be assigned to data and need not prioritization data.If data channel is by priorization, the MAC control messages of then in being responsible for the MAC layer that shines upon between logic channel and the transmission channel, carrying control information can have the priority higher than user data.

The above-mentioned priority-level of transmission channel can be distributed to be used for up-link power as the fixedly criterion of each UE.Perhaps when the available horsepower that in UE, during specific interval, is used for transmission channel is not enough, the specific or UE certain priority rank of the BS that between UE and BS, shares can be used as the criterion of power division being given the uplink transmission channels of UE.In the latter case, specific or other information of UE certain priority level can be pre-stored among BS and the UE about BS, and perhaps BS or UE can send to BS or UE with this priority-level information when the available horsepower of UE is not enough.

All transmission channels that significantly, will not carry out priorization are in the above described manner distributed to identical distance.Can distribute only in control channel, sounding channel and the data channel, perhaps two in control channel, sounding channel and the data channel.Only need come to confirm transmitted power according to their priority-level for the channel that is assigned to same intervals.For example, if only distributed control channel, then only consider the priority-level of control channel.If control channel and data channel all are assigned with, then transmitted power is sequentially distributed to them with the descending order of priority-level.

Possibly take place in some cases influences the stability of a system unfriendly according to the distribution of the up-link transmit power of the priority-level of transmission channel.Reference table 5, for example, when PFBCH/SFBCH signal, synchronous range finding signal, detectable signal and HARQ feedback signal will be sent simultaneously, at maximum available transmit power P _MAXIn up-link transmit power is in turn distributed to PFBCH/SFBCH, synchronous range finding channel, sounding channel and HARQ feedback channel with this order.If in first symbol, after power division is given sounding channel, do not have maximum available power P _MAXResidue is used for first symbol, then in first symbol, does not have power to be assigned to the HARQ feedback channel.For second with successive character for, transmitted power is assigned to PFBCH/SFBCH and synchronous range finding channel.

With reference to figure 6 because detectable signal only resides in first symbol, so not need second with successive character in give sounding channel with transmit power assignment.Therefore, under the situation of table 3, after power division was given the synchronous range finding channel, transmitted power was assigned to the HARQ feedback channel.In symbol, the transmitted power of each transmission channel should be consistent.If be assigned to the HARQ feedback channel from the second sign-on transmitted power, and in first symbol, do not had power division to give HARQ feedback channel, then the transmitted power of HARQ feedback channel is inconsistent on identical basic allocation unit.As for control channel, if even symbol from power division, got rid of and therefore in basic allocation unit, be perforated, then the result of the receiving feature of control channel changes the receptivity that possibly make BS and reduces.For fear of this problem; When detectable signal is assigned with and sounding channel when having the priority that is higher than control channel; Predetermined priority rank according to transmission channel is distributed to first symbol that carries the detection symbol with up-link transmit power, and gives second symbol according to the predetermined priority rank of the transmission channel except control channel with transmit power assignment.That is to say that when control signal and data-signal will send simultaneously, transmitted power can be assigned to the data channel with priority, from second sign-on of UL subframe in the UL subframe.

Fig. 7 is the flow chart that diagram is used for distributing according to embodiments of the invention the method for UL transmitted power.Term definition used herein is following.

P _TXBe the estimation and, C of UL transmitted power _iBe transmission channel with i priority-level according to predetermined prioritized, P _CiBe to send transmission channel C _iNeeded transmitted power, P _MAXBe the maximum available transmit power of UE, and N is the total quantity of the transmission channel that will side by side send.

With reference to figure 7, in step S110, be each the calculating UL transmitted power in a plurality of transmission channels that during identical transmission intercal, will send.For example, UE can calculate the transmission channel C that will send simultaneously through [mathematical formulae 1] _iTo C _NUL transmitted power P _CiTo P _CNIn each.

In step S120, before transmitted power is assigned to transmission channel, P _TXBe set to ' 0 '.

In step S130, S140 and S150, has the transmission channel C of the highest priority level among the predetermined priority rank of transmission channel ₁Transmitted power P _C1Estimation and P with transmitted power _TXIf addition is and P _TX(=P _C1) less than P _MAX, P then _C1Be assigned to transmission channel C ₁

In step S130, S140 and S150, has the transmission channel C of second highest priority level ₂Transmitted power P _C2Estimation and P with transmitted power _TXIf addition is and P _TX(=P _C1+ P _C2) still less than P _MAX, P then _C2Be assigned to transmission channel C ₂

If in step S160, there is another channel that will send, then in step S170, repeat aforesaid operations to be used for next channel.

If transmitted power is at maximum available transmit power P _MAXIn can be assigned to all N transmission channel, then accomplished the distribution of the suitable UL transmitted power that arrives all transmission channels.Yet, if in first transmission channel to N the transmission channel specific one, the transmission channel C that for example has the k priority-level _KTransmitted power and less than maximum available transmit power P _MAXBut transmission channel C _K+1Transmitted power P _Ck+1With P _TXAddition is greater than P _MAX, transmitted power P then _Ck+1Can not be assigned to transmission channel C _K+1

UE is at nearly first priority to the k priority channel C of the condition that satisfies [mathematical formulae 10] ₁To C _kLast transmission signal.

Mathematical formulae 10

[mathematics 10]

$\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{P}_{\mathrm{Ci}}\&le;P_{\mathrm{MAX}}$

Describe Fig. 7 for reference table 2, do not have detectable signal and data if only transmit control signal, then at maximum available transmit power P _MAXInterior order with HARQ feedback channel, PFBCH/SFBCH, synchronous range finding channel and bandwidth request channel is given control signal with the UL transmit power assignment.If the transmitted power of HARQ feedback channel, PFBCH/SFBCH, synchronous range finding channel and less than maximum available transmit power P _MAX, but along with the addition of bandwidth request channel, the UL transmitted power and surpassed maximum available transmit power P _MAX, the UL transmitted power of then calculating through [mathematical formulae 1] only is assigned to HARQ feedback channel, PFBCH/SFBCH and synchronous range finding channel, the bandwidth request channel that does not wherein have power to be assigned to have lowest priority.

Timing when calculating the transmitted power of transmission channel, the calculating of transmitted power regularly (calculation timing) depends on realization (implementation-dependent).Although described hereinbefore, in step S110, UE calculates the transmission channel C that will send simultaneously _iTo C _NUL transmitted power P _CiTo P _CNIn each, for example, UE can come to calculate singly transmission channel C based on the predetermined priority order of transmission channel ₁To C _XThe UL transmitted power, up to C ₁To C _XTotal transmitted power P _TXReach P _MAXIn other words, based on the predetermined priority order of transmission channel, be used for transmission channel C ₁UL transmitted power P _C1Calculated and distributed to C ₁Only if, and P _C1P after the addition _TXReach P _MAXAnd, be used for transmission channel C ₂UL transmitted power P _C2Calculated and distributed to C ₂Only if, and P _C2P after the addition _TXReach P _MAXRepeating these handles up to P _TXReach P _MAXTill.

The embodiment of Fig. 7 will be described with reference to figure 2 hereinafter in more detail.

In UE 12, in step S110, processor 400a calculates necessary UL transmitted power in a plurality of transmission channels that during same intervals, will send each.For example, processor 400a can come the transmission channel C for sending simultaneously according to [mathematical formulae 1] ₁To C _NCalculate UL transmitted power P _CiTo P _CNFor the calculating of [mathematical formulae 1], receiver 300a receives from IoT value of pass through its calculating NI of BS 11 broadcasting and target SINR parameter and from the deviant of BS 11 clean cultures.Receiver 300a offers processor 400a with IoT value, target SINR parameter and deviant.Processor 400a uses the IoT value to calculate NI, and uses target SINR parameter to calculate the target SINR of each channel according to the type of channel.

Processor 400a gives the UL transmit power assignment and is higher than other other the highest preference transmission channel of predetermined priority level that conforms to.In order to do like this, according to the priority-level of transmission channel, processor 400a increases P when can be suitable for carrying out each UL transmitted power and be assigned to transmission channel _TXAlgorithm (S130), P relatively _TXWith P _MAXAlgorithm (S140) and at every turn the index of transmission channel is increased by 1 algorithm (S170).

In step S120, processor 400a is giving transmission channel before with transmitted power P transmit power assignment _TXEstimation and be set to ' 0 ', and in step S130 according to the priority-level of transmission channel through transmitted power and P with transmission channel _TXThe phase Calais makes P _TXIncrease.In step S140 and S150, processor 400a only will give its power and P through the transmit power assignment that [mathematical formulae 1] calculates _TXBe no more than maximum available transmit power P _MAXSo many transmission channels.For example, if along with transmission channel C with (k+1) priority-level UL transmitted power _K+1Transmitted power and P _TXAddition, P _TXGreater than P _MAX, then transmitted power is only distributed to first priority to the k priority transmission channel C according to [mathematical formulae 1] ₁To C _k

Processor 400a control transmitter 100a and antenna 500a utilize transmitted power P _C1To P _CkSend the transmission channel C of satisfied [mathematical formulae 10] ₁To C _k

As above-mentioned, the calculating of transmitted power regularly depends on realization.For example, processor 400a can be configured to calculate transmission channel C singly based on the predetermined priority order of transmission channel ₁To C _kThe UL transmitted power, up to C ₁To C _kTotal transmitted power P _TXReach P _MAXTill.In other words, based on the predetermined priority order of transmission channel, processor 400a can be configured to calculate transmission channel C ₁UL transmitted power P _C1And be configured to the P that is calculated _C1Distribute to C ₁Only if, and P _C1P after the addition _TXReach P _MAXAnd processor 400a calculates transmission channel C ₂UL transmitted power P _C2And with the P that is calculated _C2Distribute to C ₂Only if, and P _C2P after the addition _TXReach P _MAXProcessor 400a repeats these and handles up to P _TXReach P _MAXTill.

UE 12 can not send remaining transmission channel C to BS 11 notices through additional information _K+1To C _N

Maximum available transmit power P _MAXWith transmission channel C ₁To C _kTransmitted power and between difference can be expressed as

Mathematical formulae 11

[mathematics 11]

Therefore UE 12 has remaining available horsepower P _Residue, and how to utilize this remaining available horsepower P _ResidueIt is the thing that needs consideration.

Fig. 8 is the flow chart of method that is used to distribute the UL transmitted power that illustrates according to another embodiment of the present invention.

Defined variable P with reference to figure 7 _TX, C _i, P _Ci, P _MAXAnd N.In step S110 to S170, with Fig. 7 in identical mode described in illustrated or Fig. 7, transmitted power is in turn distributed to transmission channel with the descending order of priority.

Described embodiment compares with illustrating perhaps among Fig. 7, among the step S180 in Fig. 8 among the illustrated embodiment, according to the first transmission channel C _K+1(make P with its addition _TXSurpass P _MAX) type determine whether to distribute remaining power P _ResidueAlthough need like P _K+1As many transmitted power is to be used for transmission channel C _K+1Transmission, but the residue available horsepower P of UE _ResidueLess than P _K+1Compare P if utilize _K+1Littler power sends transmission channel C _K+1, then BS possibly not receive transmission channel C at all _K+1If, perhaps having, BS maybe nonrecognition transmission channel C _K+1Control information about the mistake of control channel has influenced next communication process.Therefore, compare, must guarantee stable channels transmission for control channel with data channel.

Under this background, if transmission channel C _K+1Be control channel, then abandon its transmission, rather than utilize residue available horsepower P _ResidueSend this transmission channel C _K+1On the other hand, if transmission channel C _K+1Be data channel, then in step S190, utilize residue available horsepower P _{Surplus Surplus}Send this transmission channel C _K+1That is to say,, then abandon the transmission of control channel if it is not enough to be used for the transmitted power of specific control channel.

As for sounding channel, inaccurate detectable signal possibly influence UE unfriendly.Therefore, if transmission channel C _K+1Be sounding channel, then abandon its transmission.

UE can send the information relevant with the transmission channel that can not be sent to BS, makes BS can discern the state of UE based on received information.

For reference table 2 is described Fig. 8, if only do not transmit control signal under detectable signal and the data conditions having, then at maximum available transmit power P _MAXIn with the order of HARQ feedback channel, PFBCH/SFBCH, synchronous range finding channel and bandwidth request channel up-link transmit power is distributed to control signal.If the transmitted power of HARQ feedback channel and PFBCH/SFBCH and less than P _MAXBut, the transmitted power of HARQ feedback channel, PFBCH/SFBCH and synchronous range finding channel and greater than P _MAX, the UL transmitted power of then calculating through [mathematical formulae 1] only is assigned to HARQ feedback channel and PFBCH/SFBCH, and the transmission of synchronous range finding channel is dropped.

The embodiment of Fig. 8 will be described with reference to figure 2 hereinafter in more detail.

Compare with the embodiment of Fig. 7, in UE 12, in step S180, processor 400a can be according to transmission channel C _K+1Type determine whether remaining power P _ResidueDistribute to the first transmission channel C _K+1(cause P with its addition _TXGreater than P _MAX).

If transmission channel C _K+1Be control channel or sounding channel, then abandon transmission channel C _K+1Transmission, rather than utilize remaining power P _ResidueSend transmission channel C _K+1That is to say that processor 400a control transmitter 100a and antenna 500a only utilize transmitted power P _C1To P _CkSend the transmission channel C of satisfied [mathematical formulae 10] ₁To C _k

On the other hand, if transmission channel C _K+1Be data channel, then in step S190 with dump power P _ResidueDistribute to transmission channel C _K+1Then, processor 400a control transmitter 100a and antenna 500a utilize transmitted power P _ResidueSend transmission channel C _K+1That is to say that processor 400a is with dump power P _ResidueDistribute to transmission channel C _K+1, and control transmitter 100a and antenna 500a are with transmission transmission channel C _K+1And the transmission channel C that satisfies [mathematical formulae 10] ₁To C _k

Fig. 9 is the flow chart that diagram is used for distributing according to another embodiment of the present invention the method for UL transmitted power.

Defined variable P with reference to figure 7 _TX, C _i, P _Ci, P _MAXAnd N.In step S210, P _TXCan be set to ' 0 ' at first.

With reference to figure 9, send at the same time under the situation of a plurality of transmission channels, in step S210 to S280, confirm the UL transmitted power of allocated channel based on the predetermined priority order of transmission channel, reach the max power constraint P of UE up to total transmitted power _MAXTill.Can calculate the UL transmitted power of allocated channel according to [mathematical formulae 1].Calculate the necessary parameter of transmitted power and can be broadcasted or unicasted to UE from BS.

Compare with Fig. 8 with Fig. 7, in step S220, calculate a transmission channel C _iUL transmitted power P _Ci, and in step S240 with P _TX(itself and P in step S230 _CiAddition) and P _MAXCompare.In other words, UE calculates the UL transmitted power singly, reaches P up to total transmitted power _MAXTill.Like what in the description of Fig. 7, mentioned,, therefore can calculate the UL transmitted power of allocated channel simultaneously because the timing when calculating the UL transmitted power is the problem that depends on realization.

If P _TXBe no more than P _MAX, the P that then in step S250, is calculated _CiBe assigned to C _iIf in step S260, there is another channel that to send, then in step S270, repeat above operation in S220 to S250 to be used for next channel.

Compare dump power P in step S280 with illustrated embodiment among Fig. 8 _ResidueBe assigned to C _K+1, and no matter transmission channel C _K+1(P _TXWith make P after its addition _TXSurpass P _MAX) type how.Although need like P _K+1As many transmitted power is to be used for transmission channel C _K+1Transmission, but the residue available horsepower P of UE _ResidueLess than P _K+1Different with illustrated embodiment among Fig. 8, in step S280 according to Fig. 9 in the UE of illustrated embodiment with P _ResidueDistribute to C _K+1, and the UL transmitted power of utilizing them to distribute side by side sends C ₁To C _KIt is the P that favourable part is UE _MAXRun out being used to send the channel of assignment, thereby do not waste P _Residue

Under this background, if there is transmission channel C _K+2, then abandon from C _K+2The transmission of transmission channel.

The embodiment of Fig. 9 will be described with reference to figure 2 hereinafter in more detail.

In UE 12, processor 400a is configured to P in step S210 _TXInitial value be set to ' 0 '.

With reference to figure 9; Under the situation of in a plurality of transmission channels, sending; In step S210 to S280, processor 400a is configured to confirm based on the predetermined priority order of transmission channel the UL transmitted power of allocated channel, reaches the max power constraint P of UE up to total transmitted power _MAXTill.Processor 400a can be configured to calculate transmission channel C according to [mathematical formulae 1] _iUL transmitted power P _CiFor the calculating of [mathematical formulae 1], receiver 300a receives IoT value of pass through its calculating NI from BS 11 broadcasting, target SINR parameter and from the deviant of BS 11 clean cultures.Receiver 300a is provided to processor 400a with IoT value, target SINR parameter and deviant.Processor 400a uses the IoT value to calculate NI, and uses target SINR parameter to confirm the target SINR of each channel according to the type of channel.

Compare with Fig. 8 with Fig. 7, processor 400a is configured to calculate transmission channel C in step S220 _iUL transmitted power P _Ci, and in step S240 with P _TX(in step S230 with itself and P _CiAddition) and P _MAXCompare.In other words, processor 400a is configured to calculate singly the UL transmitted power, reaches P up to total transmitted power _MAXTill.Mentioned in the description like Fig. 7, because the timing when calculating the UL transmitted power is the problem that depends on realization, so processor 400a can calculate the UL transmitted power of allocated channel simultaneously.

If P _TXBe no more than P _MAX, then in step S250 processor 400a with the P that is calculated _CiDistribute to C _iIf in step S260, there is another channel that will send, then processor 400a repeats above operation in S220 to S250 to be used for next channel in step S270.

Compare with illustrated embodiment among Fig. 8, processor 400a is with dump power P in step S280 _ResidueDistribute to C _K+1, and no matter transmission channel C _K+1(itself and P _TXMake P after the addition _TXSurpass P _MAX) type how.Although need like P _K+1As many transmitted power is to be used for transmission channel C _K+1Transmission, but the residue available horsepower P of UE _ResidueLess than P _K+1Different with illustrated embodiment among Fig. 8, in step S280 according to Fig. 9 in the processor 400a of illustrated embodiment with P _ResidueDistribute to C _K+1, and the UL transmitted power that control transmitter 100a utilizes them to distribute is side by side sent C ₁To C _K+1If there is transmission channel C _K+2, then processor 400a control transmitter 100a abandons from C _K+2The transmission of transmission channel.

The transmission of the transmission channel on single carrier has been described hereinbefore.The method that when on a plurality of carrier waves, sending them, is used for the UL transmit power assignment is given transmission channel will be described hereinafter.

If power is not limited for each carrier wave, then can give the transmission channel that is assigned to a plurality of carrier waves with power division in the above described manner.That is to say, under the situation of not distinguishing carrier wave, in the transmission channel each is confirmed transmitted power, and according to the predetermined priority rank of the transmission channel maximum available power P at UE _MAXIn give transmission channel with transmit power assignment.

Yet,, in the Power Limitation of this carrier wave, give the transmission channel that is assigned to each carrier wave with power division according to the priority-level of transmission channel if existence is to the restriction of power for each carrier wave.If total power of carrier wave surpasses maximum available transmit power P _MAX, then can abandon transmission channel, up to maximum available transmit power P with the descending order of priority _MAXTill not being exceeded.Can also be in maximum available transmit power give transmission channel with power division, and do not distinguish carrier wave, and whether the power of confirming to distribute to each carrier wave then surpasses the Power Limitation of this carrier wave according to the predetermined priority rank of transmission channel.For example, if total power of specific carriers surpasses the Power Limitation of this carrier wave, then can abandon the transmission channel of distributing to this carrier wave with the descending order of priority.If exist its total power to surpass a plurality of carrier waves of their Power Limitation, then the descending order with priority abandons the transmission channel of distributing to these carrier waves, up to maximum available transmit power P for these carrier waves _MAXTill not being exceeded.

The UL power division of a plurality of carrier waves can be controlled by the controller 400a of UE 12.Processor 400a control transmitter 100a is with at maximum available transmit power P _MAXIn distributed to them transmitted power come side by side to send transmission channel.

According to the abovementioned embodiments of the present invention, can be at the maximum available power P of UE _MAXIn distribute the UL transmitted power effectively.

Importance, renewal period and re-transmission possibility according to transmission channel are come the prioritized transmission channel.Therefore, can stably send UL control signal and data, thereby help the stability of overall wireless communications system.

Industrial applicibility

The present invention is applicable to the method and apparatus of control UL power in wireless communication system.

It will be apparent to those skilled in the art that under the situation that does not deviate from spirit of the present invention or scope, can make various modifications and variation in the present invention.Therefore, be contemplated that the present invention contains modification of the present invention and variation, as long as they fall in the scope of accompanying claims and their equivalent.

Claims (12)

1. method that is used for controlling at the subscriber equipment place up-link transmit power of a plurality of transmission channels at wireless communication system, said method comprises:

Maximum available transmit power (P at said subscriber equipment _MAX) in the one or more transmission channels among said a plurality of transmission channels are confirmed up-link transmit power; And

Come side by side to send said one or more transmission channel with in the up-link transmit power that said one or more transmission channels are confirmed each,

Wherein, Other descending order of predetermined priority level with transmission channel is confirmed up-link transmit power, and priority-level is scheduled to so that control channel, sounding channel, data channel and bandwidth request channel have the priority-level according to descending order.

2. method according to claim 1; Wherein, Said control channel further is classified as and mixes automatic repeat requests (HARQ) feedback channel, fast feedback channel (FBCH) and range channel, and said HARQ feedback channel, said FBCH and said range channel have the priority-level according to descending order.

3. method according to claim 1 and 2, wherein, said forwarding step is with to transmission channel C ₁To C _kThe up-link transmit power P that confirms _C1To P _CkCome side by side to send the transmission channel C that satisfies the expressed condition of following equality among said a plurality of transmission channel ₁To C _k,

$\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{P}_{\mathrm{Ci}}\&le;P_{\mathrm{MAX}}$

Wherein, k is the maximum integer that satisfies said condition, C _iThe transmission channel that expression has the i priority-level, P _CiExpression is to transmission channel C _iThe up-link transmit power of confirming.

4. method according to claim 3, wherein, together with said transmission channel C ₁To C _kTogether, said forwarding step side by side sends the transmission channel C with (k+1) priority-level with the up-link transmit power that calculates through following equality _K+1,

$P_{C_{k+1}}=P_{\mathrm{MAX}}-\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{P}_{\mathrm{Ci}}.$

5. method according to claim 3, wherein, if having the transmission channel C of (k+1) priority-level _K+1Be control channel, then only send said transmission channel C ₁To C _k

6. method according to claim 5, wherein, if having the transmission channel C of (k+1) priority-level _K+1Be data channel, then together with said transmission channel C ₁To C _kTogether, send said transmission channel C with the up-link transmit power that calculates through following equality _K+1,

$P_{C_{k+1}}=P_{\mathrm{MAX}}-\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{P}_{\mathrm{Ci}}.$

7. subscriber equipment that is used at the up-link transmit power of a plurality of transmission channels of wireless communication system control, said subscriber equipment comprises:

Transmitter, said transmitter is configured to send signal; And

Processor, said processor is configured to control said transmitter,

Wherein, said processor is configured at the maximum available transmit power (P of the subscriber equipment of said subscriber equipment _MAX) in the one or more transmission channels among said a plurality of transmission channels are confirmed up-link transmit power; And be configured to come side by side to send said one or more transmission channel with the up-link transmit power that said one or more transmission channels are confirmed

Wherein, said processor is configured to confirm up-link transmit power with other descending order of predetermined priority level of transmission channel, and

Priority-level is scheduled to so that control channel, sounding channel, data channel and bandwidth request channel have the priority-level according to descending order.

8. subscriber equipment according to claim 7; Wherein, Said control channel further is classified as and mixes automatic repeat requests (HARQ) feedback channel, fast feedback channel (FBCH) and range channel, and said HARQ feedback channel, said FBCH and said range channel have the priority-level according to descending order.

9. according to claim 7 or 8 described subscriber equipmenies, wherein, said processor is configured to control said transmitter with to transmission channel C ₁To C _kThe up-link transmit power P that confirms _C1To P _CkCome side by side to send the transmission channel C that satisfies the expressed condition of following equality among said a plurality of transmission channel ₁To C _k,

$\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{P}_{\mathrm{Ci}}\&le;P_{\mathrm{MAX}}$

Wherein, k is the maximum integer that satisfies said condition, C _iThe transmission channel that expression has the i priority-level, P _CiExpression is to said transmission channel C _iThe up-link transmit power of confirming.

10. subscriber equipment according to claim 9, wherein, said processor is configured to control said transmitter together with said transmission channel C ₁To C _kTogether, come side by side to send transmission channel C with the up-link transmit power that calculates through following equality with (k+1) priority-level _K+1,

$P_{C_{k+1}}=P_{\mathrm{MAX}}-\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{P}_{\mathrm{Ci}}.$

11. subscriber equipment according to claim 9, wherein, if having the transmission channel C of (k+1) priority-level _K+1Be control channel, then said processor is configured to control said transmitter and only sends said transmission channel C ₁To C _k

12. subscriber equipment according to claim 11, wherein, if having the transmission channel C of (k+1) priority-level _K+1Be data channel, then said processor is configured to control said transmitter together with said transmission channel C ₁To C _kTogether, send said transmission channel C with the up-link transmit power that calculates through following equality _K+1,

$P_{C_{k+1}}=P_{\mathrm{MAX}}-\underset{i=1}{\overset{k}{\mathrm{\&Sigma;}}}{P}_{\mathrm{Ci}}.$

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