CN101611565B - Uplink power control for LTE - Google Patents

Abstract

Systems and methodologies are described that facilitate employing aperiodic closed loop power control corrections in a Long Term Evolution (LTE) based wireless communication environment. An aperiodic power control command can be sent over a downlink to control and/or correct an uplink power level employed by an access terminal. Transmission of the aperiodic power control can be triggered by a measurement (e.g., received power being outside a set margin). The aperiodic power control command can include a single-bit and/or a multi-bit correction. Further, the access terminal can alter the uplink power level employed for subsequent uplink transmissions based upon the aperiodic power control command when received. Additionally, regardless whether the aperiodic power control command is received at a given time over the downlink, the access terminal can employ periodic power control commands and an open loop power control mechanism to adjust the uplink power level.

Description

The up-link power that is used for LTE is controlled

Cross reference

It is the U.S. Provisional Patent Application No.60/889 of " A METHOD ANDAPPARATUS FOR POWER CONTROL USING A POWER CONTROLPREAMBLE " that the application requires the exercise question that on February 14th, 2007 submitted to, 931 rights and interests.By reference, above-mentioned application is completely integrated in this.

Technical field

Following explanation relates generally to radio communication, and more specifically, relates to control up link (UL) power level that control accesses terminal and uses in based on the wireless communication system of Long Term Evolution (LTE).

Background technology

Be widely used wireless communication system, in order to provide such as the voice that can provide via this wireless communication system and/or various types of communications of data.Typical wireless communication system or network can be provided to the multiple access of one or more shared resources (for example, bandwidth, transmitting power etc.).For example, system can use the various multiple access technologies such as frequency division multiplexing (FDM), time division multiplexing (TDM), code division multiplexing (CDM), OFDM (OFDM), single carrier frequency division multiplexing (SC-FDM) etc.In addition, system can meet the standard such as third generation cooperative programme (3GPP), 3GPP Long Term Evolution (LTE) etc.

Generally, wireless multiple-access communication system can be supported a plurality of communications that access terminal simultaneously.Each accesses terminal and can communicate via the transmission on forward direction and reverse link and one or more base station.Forward link (perhaps down link) refers to from the base station to the communication link that accesses terminal, and reverse link (perhaps up link) refers to from the communication link of the base station that accesses terminal.Can be via single-input single-output (SISO), many single outputs of input (MISO), the many output of single input (SIMO) or this communication link of multiple-input and multiple-output (MIMO) system made.

Wireless communication system usually uses one or more base stations and the sector of overlay area is provided at the place, base station.Typical sector can send a plurality of data flow for broadcasting, multicast and/or unicast services, and wherein, certain data flow can be the data flow of certain independent reception interested that accesses terminal.Can use accessing terminal to combined-flow entrained, receive more than or all data flow in this sector coverage area.Similarly, access terminal and data can be sent to the base station or another accesses terminal.In the situation that accessing terminal of many transmitted signal data is near each other, for the communication on up link, in order to produce enough signal to noise ratios (SNR) on different data rates and transmission bandwidth, it is important that power is controlled.When realizing above-mentioned target, the expense that expectation will cause due to the transmission that the power adjustment that these are accessed terminal is carried out keeps lowly as far as possible.

Summary of the invention

For the basic comprehension to these embodiment is provided, the below has provided the simplification general introduction to one or more embodiment.This general introduction is not the extensive overview to all contemplated embodiments, and neither want key or the important elements of all embodiment are identified, neither want to describe the scope of any or all embodiment.Its sole purpose is some concepts that provide in simplified form one or more embodiment, as to the given prelude that more describes in detail after a while.

According to one or more embodiment with and corresponding open, be combined with and help use irregular close-loop power control to proofread and correct in based on the wireless communications environment of Long Term Evolution (LTE) various aspects are described.Can send irregular power control command on down link, so that the uplink power level of using accessing terminal is controlled and/or proofreaied and correct.Can pass through measured value (for example, set received power outside boundary ...) or by on down link with control information from sectored transmissions to the chance that accesses terminal, trigger the transmission that irregular power is controlled.Irregularly power control command can comprise single-bit and/or many bit correction.In addition, when receiving irregular power control command, access terminal and to change based on irregular power control command the uplink power level that is used for the subsequent uplink transmission.In addition, no matter whether receiving irregular power control command on preset time on down link, access terminal can the periodic power control command and open Loop Power control mechanism uplink power level is adjusted.

According to related fields, this paper describes the method that helps generating power control command in wireless communications environment.The method can comprise from the receiving uplink transmission that accesses terminal.In addition, the method can comprise and determines whether to adjust the uplink power level that accesses terminal and use.In addition, the method can comprise use to be used for that down link (DL) distributes and 1/ layer of 2 (L1/L2) control information channel of layer of up link (UL) license to the transmission power control commands that accesses terminal, with the change uplink power level.

Another aspect relates to radio communication device.This radio communication device can comprise the memory of holding instruction, and these instructions are used for: obtain with the ul transmissions of uplink power level from accessing terminal and sending; Explain whether change uplink power level; When being changed, uplink power level estimates the adjustment amount to uplink power level; And via distribute for down link (DL) and 1/ layer of 2 (L1/L2) control information channel of layer that up link (UL) license is used with power control command transmitting to accessing terminal, with the change uplink power level.In addition, radio communication device can comprise the processor that is connected to memory, is configured as to carry out the instruction that is kept in memory.

Another aspect relates to radio communication device, and it makes it possible to be created in the power control command that is used by wireless terminal in wireless communications environment.This radio communication device can comprise the module for the ul transmissions that obtains to send from accessing terminal with uplink power level.In addition, this radio communication device can comprise for the module of estimating the uplink power level that whether changing accesses terminal uses.In addition, radio communication device can comprise that for via distributing for down link (DL) and the module of layer 1/ layer of 2 (L1/L2) control information channel transmission power control command that up link (UL) license is used, this power control command is specifically measured the uplink power level adjustment.

Another aspect relates to the machine readable media with machine-executable instruction stored thereon, and these machine-executable instructions are used for: obtain with the ul transmissions of uplink power level from accessing terminal and sending; Estimate whether to change the uplink power level that accesses terminal and use; And via 1/ layer of 2 (L1/L2) control information channel transmission power control command of layer of distributing for down link (DL) and up link (UL) license is used, this power control command is specifically measured the uplink power level adjustment.

According to another aspect, the device in wireless communication system can comprise processor, wherein, processor can be configured to from the receiving uplink transmission that accesses terminal.In addition, processor can be configured to determine whether that the uplink power level of using accessing terminal adjusts.In addition, processor can be configured to via distribute for down link (DL) and up link (UL) license is used layer of 1/ layer 2 (L1/L2) control information channel with power control command transmitting to accessing terminal, when triggering by measured value, power control command changes uplink power level.

According to other side, this paper describes the method that helps to use power control command in wireless communications environment.The method can comprise send data with power level on up link.In addition, the method can comprise via layer 1/ layer of 2 (L1/L2) control information channel that distributes for down link (DL) and up link (UL) license is used power control command is received.The method can also comprise based on power control command change power level.In addition, the power level after the method can comprise changing sends data on up link.

Another aspect relates to the radio communication device that can comprise memory, and this memory is held instruction, and these instructions are used for: send data on up link with power level; Obtain power control command via 1/ layer of 2 (L1/L2) control information channel of layer that distributes for down link (DL) and up link (UL) license is used; And be subsequent data transmission Modulating Power level based on power control command.In addition, radio communication device can comprise the processor that is connected to memory, is configured as to carry out the instruction that is kept in memory.

Another aspect relates to radio communication device, and it makes it possible to use power control command in wireless communications environment.This radio communication device can comprise for send the module of data on up link with power level.In addition, this radio communication device can comprise for obtain the module of power control command via 1/ layer of 2 (L1/L2) control information channel of layer that distributes for down link (DL) and up link (UL) license is used.In addition, this radio communication device can comprise for change the module of the power level of subsequent data transmission according to power control command.

Another aspect relates to the machine readable media with machine-executable instruction stored thereon, and these machine-executable instructions are used for: send data on up link with power level; Obtain power control command via 1/ layer of 2 (L1/L2) control information channel of layer that distributes for down link (DL) and up link (UL) license is used; And change the power level that is used for the subsequent data transmission according to power control command.

According to another aspect, the device in wireless communication system can comprise processor, wherein, processor can be configured to send on up link with power level data.In addition, processor can be configured to via 1/ layer of 2 (L1/L2) control information channel received power control command of layer of distributing for down link (DL) and up link (UL) license is used.In addition, processor can be configured to change power level based on power control command.In addition, the power level after processor can being configured to change sends data on up link.

In order to realize aforementioned and related objective, one or more embodiment comprise the feature that proves absolutely thereafter and particularly point out in the claims.Following explanation and accompanying drawing have provided some illustratives aspect of one or more embodiment in detail.Yet these aspects are tell-tale, still can use the principle of a plurality of embodiment in some in various ways, and described embodiment wants to comprise all these aspects and their equivalent.

Description of drawings

Fig. 1 is that various aspects given according to this paper are to the explanation of wireless communication system;

Fig. 2 is the explanation of example system, and this example system is controlled the uplink power level of using that accesses terminal in the wireless communications environment based on LTE;

Fig. 3 is the explanation of example system, and the uplink power level that this example system is used accessing terminal is periodically proofreaied and correct;

Fig. 4 is the explanation of example system, and this example system is sent to power control command aperiodically based on accessing terminal in the wireless communications environment of LTE;

Fig. 5 is the explanation of example system, and this example system is divided into groups to accessing terminal for emissive power control command on down link;

Fig. 6 is the explanation for the exemplary transmission structure that power control command is sent to the group that accesses terminal;

Fig. 7 is the exemplary sequential chart for the periodicity up-link power control procedure of LTE;

Fig. 8 is the exemplary sequential chart for the irregular up-link power control procedure of LTE;

Fig. 9 is the explanation of illustrative methods, and this illustrative methods helps generating power control command in wireless communications environment;

Figure 10 is the explanation of illustrative methods, and this illustrative methods helps to use power control command in wireless communications environment;

Figure 11 is the exemplary explanation that accesses terminal, and this exemplary accessing terminal helps to utilize irregular power control command in the wireless communication system based on LTE;

Figure 12 is the explanation of example system, and this example system helps to produce irregular power control command in based on the wireless communication system of LTE;

Figure 13 is the explanation of example wireless network environment, can use this example wireless network environment in conjunction with various system and methods described herein;

Figure 14 is the explanation of example system, and this example system makes it possible to produce the power control command that accesses terminal and utilize in wireless communications environment;

Figure 15 is the explanation of example system, and this example system makes it possible to utilize power control command in wireless communications environment.

Embodiment

With reference now to accompanying drawing, each embodiment is described, wherein, run through in full and use similar reference number to refer to similar element.In following explanation, for illustrative purposes, for the thorough understanding to one or more embodiment is provided, many specific detail have been provided.Yet, can not adopt these specific detail to realize these embodiment, this can be apparent.In other example, in order to help that one or more embodiment are described, show well-known structure and equipment with the form of block diagram.

As using in this application, term " assembly ", " module ", " system " etc. are to want to refer to the entity relevant to computer, i.e. the combination of hardware, firmware, hardware and software, software or executory software.For example, assembly can be the process moved on processor, processor, object, executable, execution thread, program and/or computer, but is not restricted to this.The mode that illustrates by way of example, the application program of moving on computing equipment and computing equipment can be assemblies.But one or more assemblies can reside in process and/or execution thread, and assembly can and/or be distributed between two or more computers on a computer.In addition, can carry out these assemblies from the various computer-readable mediums that store various data structures.For example, according to (for example having one or more packets, from with local system in, in distributed system and/or such as the data of the synergistic assembly of another assembly on the network of the internet of the mode by signal and other system interaction) signal, these assemblies can communicate by the mode of this locality and/or teleprocessing.

In addition, this paper is described each embodiment in conjunction with accessing terminal.Can be called with accessing terminal system, subscriber unit, subscriber board, travelling carriage, mobile phone, remote station, remote terminal, mobile device, user terminal, terminal, Wireless Telecom Equipment, user agent, subscriber equipment or user's set (UE).Access terminal can be that cell phone, cordless telephone, session initiation protocol (SIP) phone, wireless local loop (WLL) are stood, personal digital assistant (PDA), the handheld device with wireless connections ability, computing equipment or be connected to other treatment facility of radio modem.In addition, can be described each embodiment in conjunction with the base station at this paper.The base station can be used for communicating with accessing terminal, and the base station can be called access point, Node B, e Node B (eNB) or some other term.

In addition, many aspects described herein or feature can be embodied as manufacturing a product of method, device or Application standard program and/or engineering.It is that want to comprise can be from the computer program of any computer readable device, carrier wave or medium access that as used herein term " manufactures a product ".For example, computer-readable medium (for example can comprise magnetic storage apparatus, hard disk, floppy disk, tape etc.), CD (for example, compact disc (CD), DVD (DVD) etc.), smart card and flash memory device (for example, EPROM, card, rod, secret key driving etc.), but be not limited to this.In addition, various storage medium described herein can represent one or more equipment and/or other machine readable media for storage information.Term " machine readable media " can comprise wireless channel and can store, comprise and/or carry various other media of instruction and/or data, but be not restricted to this.

With reference now to Fig. 1,, a plurality of embodiments given according to this paper describe wireless communication system 100.System 100 comprises base station 102, and base station 102 can comprise a plurality of antenna sets.For example, an antenna sets can comprise antenna 104 and 106, and another group can comprise antenna 108 and 110, and another group can comprise antenna 112 and 114.For each antenna sets shows two antennas, yet, can use antenna more or still less for each group.In addition, base station 102 can comprise transmitter chain and receiver chain, recognize as those skilled in the art, each chain can comprise again a plurality of assemblies relevant to the signal sending and receiving (for example, processor, modulator, multiplexer, demodulator, demodulation multiplexer, antenna etc.).

The respective sectors of base station 102 can with such as access terminal 116 and 122 one or more the accessing terminal of accessing terminal communicate, yet, to recognize, base station 102 can be similar to 116 and 122 the accessing terminal of any in fact number of accessing terminal and communicate.For example, accessing terminal 116 and 122 can be any other suitable equipment that cell phone, smart phone, kneetop computer, handheld communication devices, handheld computing device, satellite radio devices, global positioning system, PDA and/or be used for communicates on wireless communication system 100.As described, accessing terminal 116 communicates with antenna 112 and 114, and wherein, antenna 112 and 114 sends to information on forward link 118 and accesses terminal 116, and on reverse link 120 from the 116 reception information that access terminal.In addition, accessing terminal 122 communicates with antenna 104 and 106, and wherein, antenna 104 and 106 sends to information on forward link 124 and accesses terminal 122, and on reverse link 126 from the 122 reception information that access terminal.In frequency division multiplexing (FDD) system, for example, forward link 118 can utilize the different frequency band of frequency band that uses from reverse link 120, and forward link 124 can use the different frequency band of frequency band that uses from reverse link 126.In addition, in time division multiplexing (TDD) system, forward link 118 and reverse link 120 can utilize common band, and forward link 124 and reverse link 126 can utilize common band.

Every group of antenna and/or the zone of specifying every group of antenna to communicate therein can be called the sector of base station 102 or the honeycomb of eNB.For example, antenna sets can be designed to communicate with accessing terminal in the sector of 102 overlay areas, base station.In communicating by letter on forward link 118 and 124, the transmitting antenna of base station 102 can utilize beam forming, is used for accessing terminal 116 and 122 forward link 118 and 124 signal to noise ratio in order to improve.Simultaneously, when utilizing beam forming, base station 102 accesses terminal 116 and 122 when launching to being randomly dispersed in whole relevant overlay area, with compare through an independent sky alignment its all base stations of launching that access terminal, accessing terminal in contiguous honeycomb may be subject to less interference.

For example, system 100 can be based on the system of Long Term Evolution (LTE).In this system 100, the respective sectors of base station 102 can be controlled 116 and 122 uplink power level of using that access terminal.Therefore, system 100 can provide up link (UL) power to control, this power is controlled and is produced path loss and (for example cover, path loss and cover can be along with the time slowly changes) compensation, and to disturb the compensation of (for example, because system 100 can be the system based on LTE that has adopted frequency reuse rate 1) from the time exsiccation of contiguous honeycomb.In addition, system 100 can alleviate the large variation (variation) (for example, owing to carrying out multiplexing to a plurality of users) of the received power that between a plurality of users, 102 places obtain in the base station in common band.In addition, system 100 can compensate the multipath fading variation on enough low velocity.For example, for 3km/h, channel on different carrier frequencies coherence time can be as follows: the 900MHz carrier frequency can have the coherence time of 400ms, and the 2GHz carrier frequency can have the coherence time of 180ms, and the 3GHz carrier frequency can have the coherence time of 120ms.Like this, depend on reaction time and the periodicity of adjustment, can adopt low Doppler frequency that the rapid fading effect is proofreaied and correct.

System 100 can use up-link power open Loop Power control is machine-processed and that close-loop power control mechanism combines to control.According to an example, each accesses terminal and 116,122 can utilize open Loop Power control to be first leading power level that arranges of Random Access Channel (RACH) communication.Leading for first of RACH, each accesses terminal and 116,122 can have from the base station 102 down links (DL) communications that obtain, and open loop mechanism can be so that each accesses terminal and 116,122 can select the up-link transmission power level that is inversely proportional to received power level about the downlink communication that obtains.Like this, access terminal and 116,122 can utilize the knowledge of down link to be used for ul transmissions.By the mode that real-time power is adjusted, open loop mechanism can allow the violent change of radio condition is adapted to (for example, depending on received power filtering) very fast.In addition, compare with normally used conventional art, open loop mechanism can continue operation outside RACH processes.In case the random access procedure success, system 100 can utilize closed loop mechanism.For example, give when uplink resource allocation periodically and (for example access terminal 116,122 the time, periodically uplink resource can be physical uplink control channel (PUCCH) or detection reference signal (SRS, Sounding ReferenceSignal) resource), can use technology of closed loop.In addition, the respective sectors in base station 102 (and/or network) can be controlled 116,122 up-link transmission powers that use that access terminal based on closed-loop control.

The closed loop mechanism that system 100 uses can be combination periodic, irregular or both.Respective sectors in base station 102 can be with closed-loop corrected 116,122 (for example, every 0.5ms, 1ms, 2ms, the 4ms that access terminal that periodically send to of periodicity ... send once).For example, this periodicity can depend on the periodicity of ul transmissions.In addition, periodically proofread and correct can be single-bit proofread and correct (for example, up/down, ± 1dB ...) and/or many bit correction (for example, ± 1dB, ± 2dB, ± 3dB, ± 4dB ...).Like this, the periodicity of power control step-size and correction can be determined the maximum rate of the up-link power variation that the interior respective sectors in base station 102 (and/or network) can be controlled.According to another example, can as required the respective sectors of irregular correction from base station 102 be sent to and access terminal accordingly 116,122.According to this example, when by the network measure value (for example, setting reception (RX) power outside boundary, with control information send to the given chance that accesses terminal ...) when triggering, can send aperiodically these corrections.In addition, irregular correction can be single-bit and/or many bits (for example, proofreading and correct scheduling but not the correction size because the live part with the positively related expense in irregular school can relate to, so correction can be many bits).According to another example, the respective sectors in base station 102 can also will irregularly be proofreaied and correct to send to except periodically proofreading and correct and be accessed terminal 116,122, to minimize the expense that transmission was caused of these power adjustment.

Turn to now Fig. 2, illustrated is system 200, and it is controlled the uplink power level of using based on accessing terminal in the wireless communications environment of LTE.System 200 comprises the sector in base station 202, and it can communicate with the (not shown) that accesses terminal of any in fact number.In addition, the sector in base station 202 can comprise received power monitor 204, and it is estimated the power level relevant to the uplink signal that obtains from accessing terminal.In addition, the sector in base station 202 can comprise up link (UL) power regulator 206, and it utilizes the power level after analyzing to generate order, in order to change the power level that accesses terminal.

Can be for base station 202 and the communication between accessing terminal each physics (PHY) channel 208 is carried out lever balance; These physical channels 208 can comprise downlink physical channel and uplink physical channel.The example of downlink physical channel comprises physical downlink control channel (PDCCH), physical down link sharing channel (PDSCH) and Common Power Control Channel (CPCCH).PDCCH is 1/ layer of 2 (L1/L2) control channel of DL layer (for example, being DL or UL transmission distribution PHY layer resource), and it has the capacity of about 30-60 bit and is subjected to cyclic redundancy check (CRC) (CRC) protection.PDCCH can carry up link license (grant) and downlink allocation.PDSCH is that DL shares data channel; PDSCH can be the DL data channel of sharing between different user.Send CPCCH on DL, be used for a plurality of accessing terminal carried out the control of UL power.The correction that sends on CPCCH can be single-bit or many bits.In addition, CPCCH can be the particular instance of PDCCH.The example of uplink physical channel comprises physical uplink control channel (PUCCH), physical uplink link sharing channel (PUSCH), detection reference signal (SRS) and Random Access Channel (RACH).PUCCH comprises report, ack channel and the UL request of CQI (CQI) channel.PUSCH is that UL shares data channel.SRS can not have information, and can enable the channel on UL is surveyed, and channel is sampled on some or all of system bandwidth in order to allow.To recognize, the theme of institute's prescription is not restricted to these exemplary physical channels 208.

Received power monitor 204 and UL power regulator 206 can provide close-loop power control for the ul transmissions of carrying out that accesses terminal.Operation in the LTE system can be in preset time, transmission on the bandwidth that can be significantly less than system's 200 overall bandwidth.Each accesses terminal can be in preset time, send on the sub-fraction of system's 200 overall bandwidth.In addition, accessing terminal can the frequency of utilization frequency hopping; Like this, attempt to meet difficulty to will estimate the adjustment that the uplink power level that accesses terminal is carried out the time when the respective sectors in base station 202.Therefore, the appropriate close-loop power control mechanism that is provided by received power monitor 204 and UL power regulator 206 is from estimating building broadband reception power on possible a plurality of moments and the transmission on possible a plurality of UL PHY channels, and it can not considered to access terminal transmission bandwidth and appropriate correction to path loss and capture-effect is provided at any time.

Received power monitor 204 has built broadband reception power based on the transmission that accesses terminal in every way and has estimated from channel sample.For example, received power monitor 204 can use PUSCH to be used for sampling.According to this example, the transmission bandwidth to PUSCH on given time slot positions.Frequency diversity scheduling can arrive the pseudo-random hopping model application transmission bandwidth at the boundary of time slot place, and may be applied to retransmit, in order to take full advantage of frequency diversity.The PUSCH transmission that utilizes frequency selective scheduling not with the frequency hopping mode applications to sending on data, and therefore, for the channel on all (perhaps great majority) frequencies is sampled, may need the long period.In addition, frequency selective scheduling can carry out balance to the transmission of SRS or PUCCH.Frequency selective scheduling is the scheduling strategy that has utilized channel selectivity; For example, frequency selective scheduling is attempted transmission is limited on optimal sub-band.This scheduling strategy accesses terminal relevant with Hypomobility.In addition, these transmission do not comprise the frequency frequency hopping usually.Frequency diversity scheduling is diverse scheduling strategy, and it uses the whole system bandwidth (for example, take minimum transmitted bandwidth capacity as mould ...) naturally to obtain frequency diversity.The transmission relevant to frequency diversity scheduling can be relevant with the frequency frequency hopping.In addition, the frequency frequency hopping can comprise the transmission frequency that changes waveform with pseudo-random fashion, in order to utilize frequency diversity from the viewpoint of channel and interference.

According to another example, received power monitor 204 can utilize PUCCH that the UL channel is sampled, and therefore, has built broadband reception power and estimated.Can also position by the transmission bandwidth to PUCCH on given time slot, carry out frequency hopping on the boundary of time slot of each Transmission Time Interval (TTI).Shared bandwidth can depend on whether there is the PUSCH transmission on specific T TI.When sending PUSCH on given TTI, can be in the band together with the remainder of transfer of data on PUSCH (for example, in order to keep the single carrier property of UL waveform) send the control information that will send on PUCCH.When not sending PUSCH on specific T TI, can be to send PUCCH on the local frequency that reserves of PUCCH transmission in the edge of system bandwidth.

According to another illustrative examples, received power monitor 204 can utilize SRS to transmit channel is sampled and built broadband reception power to be estimated.The transmission band of SRS (on the time) can equal in fact whole system frequency band (perhaps minimum accesses terminal and sends bandwidth capacity).At given SC-FDMA symbol place (for example, the SC-FDMA symbol is the minimum unit that transmits on the UL of LTE), (for example can make the transmission localization, cross over the continuous subcarrier set of frequency hopping in time) or distribution is (for example, cross over the part of whole system bandwidth or whole system bandwidth, its can or frequency hopping not ...).

Received power monitor 204 is estimated from built broadband reception power the sampling of whole system bandwidth upper signal channel.Yet, depend on mode that channel is sampled and/or whether the frequency frequency hopping be applied to transmission, received power monitor 204 builds the time interval that broadband reception power estimates from the UL channel sample can difference.

PUCCH transmission when not having the UL data occurs in the edge of band system band.Can the PUCCH transmission when having the UL data be positioned in the frequency band identical with transfer of data on PUSCH.In addition, in order to utilize the UL frequency selective scheduling, the PUSCH transmission can not change transmission frequency or frequency hopping not, yet, for the scheduling of enables frequency selectivity, for the FDD/TDD system, can carry out balance to SRS.In addition, when PUSCH frequency of utilization diversity is dispatched, the frequency frequency hopping is applied to transmission.

In addition, based on the channel sample of being completed by received power monitor 204, UL power regulator 206 can generate the order that can change the specific UL power level used of accessing terminal.This order can be single-bit proofread and correct (for example, up/down, ± 1dB ...) and/or many bit correction (for example, ± 1dB, ± 2dB, ± 3dB, ± 4dB ...).In addition, UL power regulator 206 (and/or the sector in corresponding base station 202) can send to the order that generates accessing terminal of this order expection.

In addition, each access terminal can be relevant to specific state on preset time.The example of state of accessing terminal comprises LTE_IDLE, LTE_ACTIVE and LTE_ACTIVE_CPC.Yet, will recognize, the theme of institute's prescription is not restricted to these illustrative states.

LTE_IDLE accesses terminal not have the state that accesses terminal of unique cell ID.When in the LTE_IDLE state, accessing terminal can not 202 the connection to the base station.In addition, can be via using RACH to complete from the LTE_IDLE state transitions to the LTE_ACTIVE state.

LTE_ACTIVE accesses terminal to have the state that accesses terminal of unique cell ID.In addition, when in the LTE_ACTIVE state, access terminal and to transmit data via up link and/or downlink activity ground.Accessing terminal in this state has UL private resource (CQI, the SRS that for example, periodically send ...).According to an example, accessing terminal in the LTE_ACTIVE state can be used discontinuous transmission/discontinuous reception (DTX/DRX) process, and it has expection unlike about 20ms or much longer cycle of 40ms.As to the DL behavior (for example, in the band together with the DL data or by PDCCH can be getable the UL license) direct response or by sending the UL request on PUCCH, the accessing terminal beginning PUSCH transmission in this state.In addition, the user in this state has accessing terminal of UL/DL data active swap generation, or moves high service class (GoS) and use (for example, the voice on Internet Protocol (VoIP) ...) access terminal.

LTE_ACTIVE_CPC (grouping connects continuously) is the sub-state of LTE_ACTIVE, and wherein, accessing terminal keeps their unique cell IDs, but has discharged the UL private resource.Utilize LTE_ACTIVE_CPC to make it possible to extending battery life.As to the DL behavior (for example, in the band together with the DL data or by PDCCH can be getable the UL license ...) response or by send the UL request on RACH, accessing terminal in this sub-state begins transmission.Initial Trans can based on open loop mechanism (for example, as the response to the DL behavior) or can based on a upper success leading (for example, RACH).

With reference to figure 3, illustrated is that the uplink power level of using accessing terminal is carried out the periodically system 300 of correction.System 300 comprises base station 202, and it communicates with 302 (and/or the diverse (not shown) that access terminal of any number) that access terminal.Accessing terminal 302 comprises UL power manager 304, and UL power manager 304 further comprises UL power initializer 306.In addition, access terminal and 302 comprise UL periodic transmission machine 308.Base station 202 also comprises received power monitor 204 and UL power regulator 206; UL power regulator 206 also comprises periodically adjuster 310.

Periodically adjuster 310 generate will be sent to 302 the periodicity power control command of accessing terminal (for example, cyclical transmission power control (TPC) order, periodically proofread and correct ...).In addition, periodically adjuster 310 can be with any cycle (for example, 0.5ms, 1ms, 2ms, 4ms ...) incite somebody to action the periodicity power control command transmitting to accessing terminal 302 (and/or any diverse accessing terminal); Yet, can expect that UL power regulator 206 and/or base station 202 can send this periodicity power control command.In addition, periodically adjuster 310 can produce single-bit proofread and correct (for example, up/down, ± 1dB ...) and/or many bit correction (for example, ± 1dB, ± 2dB, ± 3dB, ± 4dB ...).For example, proofread and correct if send periodically from periodicity adjuster 310 with upper frequency, so more may use single-bit to proofread and correct, and vice versa.

304 pairs of UL power manager, 302 uplink power level that are used for ul transmissions that access terminal are controlled.UL power manager 304 can be from the base station power control command of 202 receiving cycles, and change into based on the order that obtains the uplink power level that transmission is used.According to another illustrative examples, UL power initializer 306 can arrange the initial uplink transmitting power.For example, UL power initializer 306 can be used open loop mechanism, so that the initial uplink transmitting power is determined in behavior based on down link.In addition or replacedly, UL power initializer 306 can be distributed to the initial uplink power level with previous (for example, previous ...) leading (for example, RACH) the relevant power level of success.

UL periodic transmission machine 308 can send to cyclical transmission base station 202 on up link.For example, when accessing terminal 302 in LTE ACTIVE state the time, UL periodic transmission machine 308 can move.In addition, the cyclical transmission of UL periodic transmission machine 308 transmission can be SRS transmission set; Yet, will recognize, the theme of institute's prescription is not restricted to this, can use periodicity ul transmissions (for example, periodically CQI transmission, the periodically PUCCH transmission of any type ...).Like this, because the SRS transmission can be detectable signal, so UL periodic transmission machine 308 can send the SRS transmission on up link, in order on the whole system bandwidth, channel is surveyed; Therefore, on the time identical with carrying out the scheduling of uplink frequency selectivity, can use detectable signal to control calculating as UL power closed-loop corrected.In conjunction with channel is sampled, the received power monitor 204 of base station 202 can receive and/or use the transmission that is sent by UL periodic transmission machine 308.In addition, UL power regulator 206 and/or periodicity adjuster 310 can generate the order corresponding to this sampling.

According to an illustrative examples, can with the periodicity of the UL transmission that sent by 302 the UL periodic transmission machine 308 that accesses terminal with connected for the 302 DLTPC command transfer cycles of using that accessed terminal by periodicity adjuster 310; Therefore, can be take diverse transmission cycle as having the different UL transmission transmission DL TPC order that accesses terminal periodically.In addition, the periodicity of UL transmission can be relevant to the bit number that distributes for the power adjustment that accesses terminal, and wherein this power adjustment that accesses terminal is (for example, to access terminal 302 by periodicity adjuster 310 for specific accessing terminal ...) produce.For example, can pre-determine bit number and up link cyclical transmission speed (for example, SRS transmission rate, the PUCCH transmission rate of distributing for up-link power control correction ...) between mapping.According to this example, the speed that the speed that the speed that the speed that the up link cyclical transmission speed of 200Hz can be mapped to 1 bit, 100Hz can be mapped to 1 bit, 50Hz can be mapped to 2 bits, 25Hz can be mapped to 2 bits and 0Hz can be mapped to x＞2 bits.According to previous example, the bit number of punishing the adjustment of dispensing power becomes larger along with the reduction of up link cyclical transmission speed accessing terminal.(for example, there is no SRS, PUCCH in 0Hz up link cyclical transmission speed ... transmission) limit place, the power adjustment can be x＞2 bits, it can be the situation that has as required the open-loop transmission that closed loop adjusts.

Periodically adjuster 310 can on periodic basis send to correction all users in fact relevant to base station 202, in the LTE_ACTIVE state.According to an example, for example, can based on GoS demand, DRX/DTX cycle and side-play amount etc., periodicity adjuster 310 be divided into groups to the user that it sends order.Periodically adjuster 310 can upward be organized transmission power control command for the user in the particular instance (can be expressed as CPCCH or TPC-PDCCH) of PDCCH.According to another illustrative examples, periodically adjuster 310 can be used for in-band signalling user's group, and wherein, the size of user's group can be greater than or equal to 1.Can and information be sent to the relevant required relevant control (if present) that accesses terminal based on the needed bit number of correction to the positively related expense in periodicity school.

Transmit through-put power for periodicity adjuster 310 and control (TPC) order on PDCCH, can use 32 bit pay(useful) loads and 8 bit CRC.For example, can constantly use 32 the single-bit TPC order of 1ms in the time interval for 1 PDCCH.Like this, suppose and used FDD, can use single PDCCH to support 320 users that are in the LTE_ACTIVE state with 100Hz on each TTI.Therefore, can provide single-bit to proofread and correct by every 10ms, this can allow the correction of 100dB/s.According to another example, can use at 1ms 16 dibit TPC order in the time interval.Like this, suppose and used FDD, can use single PDCCH with the user in 320 LTE_ACTIVE states of 50Hz support on each TTI.Therefore, the dibit of every 20ms is proofreaied and correct the correction that allows 100dB/s.

Turn to now Fig. 4, illustrated is that power control command is sent to aperiodically based on the system that accesses terminal 400 in the wireless communications environment of LTE.System 400 comprises base station 202, and it communicates from 302 (and/or the different (not shown) that access terminal of any number) that access terminal.Base station 202 comprises received power monitor 204 and UL power regulator 206, and UL power regulator 206 further comprises irregular adjuster 402.In addition, accessing terminal 302 comprises UL power manager 304, and UL power manager 304 further comprises irregular order receiver 404.

Irregularly adjuster 402 can produce as required and point to 302 the power control command of accessing terminal.For example, when when triggering, irregularly adjuster 402 can transmit aperiodically by measuring (measurement of the condition that for example, the data (such as the received power that is arranging outside the border) that are used to from received power monitor 204 is recognized).Irregularly adjuster 402 can determine to access terminal 302 uplink power level departs from objectives on special time; Like this, as response, irregularly adjuster 402 can send order in order to this power level is adjusted.In addition, irregularly adjuster 402 can produce single-bit proofread and correct (for example, up/down, ± 1dB ...) and/or many bit correction (for example, ± 1dB, ± 2dB, ± 3dB, ± 4dB ...).

Irregularly order receiver 404 can obtain the correction that sent by irregular adjuster 402 (and/or UL power regulator 206 and/or generally speaking the respective sectors in base station 202).For example, irregularly order receiver 404 can explain that the specific correction that is sent by the respective sectors in base station 202 is to want be used to accessing terminal 302.In addition, based on the correction that obtains, irregularly order receiver 404 and/or UL power manager 304 can change 302 uplink power level of using that access terminal.

Irregularly adjuster 402 produces, and be used for the accessing terminal irregular correction of 302 uplink power level can be based on triggering.Like this, proofread and correct with periodicity and compare, due to the clean culture characteristic of irregularly proofreading and correct, so irregularly correction may be relevant to larger expense.In addition, according to an example that uses many bits irregularly to proofread and correct, can be with these correction maps to PDCCH (for example, in this case, capability correction can be distributed as DL or the part of UL license send) or PDCCH/PDSCH to (for example, in this case, can send independently or in the band together with other transfer of data transmitted power proofread and correct) particular instance.

With reference now to Fig. 5,, illustrated is system 500, and it divides into groups to a plurality of accessing terminal for transmission power control commands on down link.System 500 comprise with access terminal 1502, access terminal 2504 ..., and the N 506 that the accesses terminal base station 202 that communicates, wherein, N can be any integer.Each 502-506 that accesses terminal may further include separately UL power manager (for example, access terminal 1502 comprise UL power manager 1508, access terminal 2504 comprise UL power manager 2510 ..., the N 506 that accesses terminal comprises UL power manager N 512).In addition, respective sectors in base station 202 can comprise received power monitor 204, UL power regulator 206 and the burster 514 that accesses terminal, and the burster 514 that accesses terminal will access terminal the subset combination of 502-506 in groups to be used for emissive power control command on down link.

AT burster 514 can divide into groups to the 502-506 that accesses terminal according to various factors.For example, AT burster 514 can be assigned to one group with one or more 502-506 of accessing terminal based on DRX cycle and phase place.According to another illustrative examples, up link cyclical transmission speed (for example, SRS transmission rate, PUCCH Transmission Time Interval that AT burster 514 can use based on the 502-506 that accesses terminal ...) 502-506 that will access terminal be assigned to each the group.Each subset by the 502-506 that will access terminal is merged into different groups, UL power regulator 206 can be more efficiently carries out the transmission (for example, by in public message for being grouped in a plurality of transmission power control commands that access terminal together) of power control command by PDCCH (perhaps CPCCH) on DL.By way of example, AT burster 514 can be formed for the group of use together with the periodicity up-link power is controlled; Yet the theme of institute's prescription is not restricted to this.

According to an illustrative examples, accessing terminal 1502 can be that the SRS transmission uses the transmission rate of 200Hz, and accessing terminal 2504 can be that the transmission rate of 50Hz is used in the SRS transmission, and the N 506 that accesses terminal can be the transmission rate that 100Hz is used in the SRS transmission.AT burster 514 can identify these each transmission rates (for example, using the signal that obtains via received power monitor 204 grades to identify).Then, AT burster 514 can with access terminal 1502 and the N 506 that accesses terminal (together with any other that uses 100Hz or 200Hz transmission rate accesses terminal) be assigned to group A.AT burster 514 can also be assigned to group B with 2504 (and any different the accessing terminal of using 25Hz or 50Hz transmission rate) that access terminal.Yet, will recognize, the theme of institute's prescription is not restricted to the above stated specification example.In addition, AT burster 514 can be distributed to each group (for example, using) with group ID on PDCCH or CPCCH.502-506 distributes to each group in case will access terminal, the order that is sent by UL power regulator 206 can use corresponding to the access terminal down-chain resource of relevant particular group of expection.For example, AT burster 514 and UL power regulator 206 can co-operation in each PDCCH transmission, the TPC order is sent to a plurality of 502-506 of accessing terminal.In addition, each UL power manager 508-512 can identify appropriate PDCCH transmission, in order to intercept with (for example, based on corresponding group of ID ...) to point to its TPC order.

Turn to Fig. 6, illustrated is for the exemplary transmission structure that power control command is sent to the group that accesses terminal.For example, can use this transmission structure for the PDCCH transmission.Two exemplary transmission structures (for example, transmission structure 600 and transmission structure 602) are described; Yet, can expect that the theme of institute's prescription is not restricted to these examples.Transmission structure 600 and 602 can reduce expense by being grouped into for a plurality of users' power control command each PDCCH transmission.As described, transmission structure 600 will be grouped into for group A user's power control command first PDCCH transmission, and will be grouped into for group B user's power control command second PDCCH transmission.In addition, first all comprises cyclic redundancy check (CRC) (CRC) with second PDCCH transmission.In addition, transmission structure 602 will be incorporated in for group A and B user's power control command public PDCCH transmission.Mode by explanation, for transmission structure 602, the power control command that is used for group A user can be included in first segmentation of public PDCCH transmission, and the power control command that is used for group B user can be included in second segmentation of public PDCCH transmission.

With reference to figure 7, the exemplary sequential chart 700 that illustrated is for the periodicity up-link power control procedure of LTE.At 702 places, describe in the power control process that accesses terminal of LTE_ACTIVE state being used for.In this state, accessing terminal sends to the base station with periodic SRS transmission, and the base station is made answer with periodic TPC order to periodic SRS transmission.As shown in illustrated example, by the single TPC bit that periodically sends on down link, the transmitting power that accesses terminal is proofreaied and correct.To notice, can replace periodically SRS transmission with periodically CQI transmission, periodicity PUCCH transmission etc.Due to periodicity CQI transmission or periodically the PUCCH transmission may not cross over the whole system bandwidth, so from the viewpoint of channel detection, these transmission may be that efficient is lower; Yet, for closed-loop corrected, can measure based on the UL at the place, base station balance is carried out in these transmission.

At 704 places, to being described for the inactive cycle that accesses terminal.(for example, predetermined or use threshold period), access terminal and transfer to the sub-state of LTE_ACTIVE_CPC after the inactive cycle.In this sub-state, PHY UL resource is deallocated from accessing terminal; Therefore, when recovering the UL transmission, can not use close-loop power control.

At 706 places, the recovery ul transmissions accesses terminal.Utilize RACH to use open loop to estimate to recover ul transmissions.According to an example, if think useful, just can estimate to revise with certain forgetting factor divided ring according to a upper through-put power.As the response of the RACH that sends accessing terminal, the base station can send be used to the band internal power that accesses terminal and adjust (for example, the x bit power is adjusted, and wherein, x can be any in fact integer).

At 708 places, can verify the identity that accesses terminal by the RACH process.In addition, can complete PHY UL resource 708 places (for example, with SRS configuration together with) redistributes.

At 710 places, access terminal in the LTE_ACTIVE state.Therefore, access terminal and recover the cyclical transmission of SRS.The cycle of transmitting with periodicity SRS at 702 places in the cycle of the periodicity SRS at 710 places transmission as described, is different; Yet the theme of institute's prescription is not restricted to this.As the response to periodicity SRS transmission, the base station sends the TPC order, in this case, the TPC order account for 2 bits (for example, ± 1dB, ± 2dB).In addition, although undeclared, the transmission that accesses terminal can continue to utilize the open loop correction of determining according at the received power level at the place that accesses terminal.Therefore, can not comprise closed-loop corrected, and/or closed-loop corrected can be on the open loop correction of determining according to the variation of the place's received power that accessing terminal.

Turn to now Fig. 8, the exemplary sequential chart 780 that illustrated is for the irregular up-link power control procedure of LTE.Illustrated is for the power control process that accesses terminal at the LTE_ACTIVE state.Sequential chart 800 is the periodicity ul transmissions not.In addition, can capability correction be sent to from the base station based on the power that receives on PUSCH and access terminal.The base station is transmitted PUSCH and is estimated, in order to determine whether to carry out the power adjustment.If the required power adjustment is thought by estimating specific PUSCH transmission in the base station, irregularly the power adjustment can depend on the base station and message (for example, the TPC order in the UL license) sent to access terminal wherein.When the base station determines that this power adjustment is not necessary for given PUSCH transmission on special time, the base station need to be on this time as not send the response of given PUSCH transmission the TPC order (but, for example, response as to given PUSCH transmission can send ACK ...).Whether in addition, no matter accessing terminal obtains the TPC order in preset time, accesses terminal and forever can rely on correction based on open loop mechanism.In addition, the correction that is sent by the base station can be that single-bit is proofreaied and correct and/or many bit correction.

To recognize, can use similar scheme in the situation that have periodically UL transmission, and wherein, can send on DL as required and proofread and correct.Like this, accessing terminal periodically to send the SRS transmission on up link, and the base station can be estimated so that the power adjustment of determining to complete this SRS transmission.Afterwards, in case determine in the adjustment of special time required power, the base station just can send to the TPC order access terminal (for example, the irregular downlink transmission of power control command) on down link.

Up-link power control procedure described in Fig. 7 and 8 comprise a plurality of public aspect.That is, can be for periodically controlling with irregular up-link power the concept of using the Δ PSD (increment power spectral density) that is used for the UL transfer of data.Δ PSD can be provided as and minimized the maximum transmission power that the impact of contiguous honeycomb is allowed for given user.Δ PSD can be along with such as from the load designator of contiguous honeycomb, channel condition etc. and development and change in time.In addition, when possibility, Δ PSD can be reported to access terminal (for example, in the band).In the LTE system, network can be selected to allow to access terminal to use which MCS/Max data-pilot to powerratio to send.Yet initial Δ PSD can be based on the MCS in the UL license (for example, the relation between UL license and initial Δ PSD can be based on formula).In addition, most of aforementioned contents relate to the control of honeycomb internal power.Other mechanism that is used for honeycomb internal power control (for example, load is controlled) can be complementary with mechanism described herein.

According to another illustrative examples, periodically and irregularly the up-link power control procedure can combined running.According to this illustrative examples, can go back periodic on the basis of irregularly upgrading and upgrade.If there is the PUSCH transmission that is scheduled, these PUSCH transmission may need to have accordingly the PDCCH transmission of UL license, and therefore, can utilize UL to permit transmission power control commands in PDCCH.For example, if PDCCH for lasting UL transmission unavailable (for example, owing to by higher level, the PHY resource being configured, so do not need the UL license), so can be on TPC-PDDCH1 transmission power control commands.Simultaneously, if there is the PDSCH that is scheduled on DL, the power of PUCCH is controlled (for example, CQI and ACK/NAK) and can be become more important so.In this case, can together with distributing, DL transmit the power control command that is used for PUCCH on PDCCH.For the DL transmission that does not have relevant control or for the situation that there is no the behavior of DL data, can use the cyclical transmission on TPC-DPCCH2 to carry out power control to PUCCH.Therefore, (for example using available resources, for PUSCH uses PDCCH with UL license, uses the PDCCH with DL distribution, the periodicity TPC order on TPC-PDCCH for PUCCH, it can be relevant to the PUSCH of PUCCH and lasting scheduling,) time, (for example, aperiodically) can emissive power control command when needed.

With reference to figure 9-10, illustrated to relate in wireless communications environment with proofreading and correct the method for controlling up-link power.Although for simplicity purposes of illustration with method representation and be described as a series of actions, but will understand and recognize, method is not subjected to the restriction of running order, according to one or more embodiment, some actions can occur and/or with shown in this paper and described other action parallel appearance with different order.For example, it should be appreciated by those skilled in the art that and recognize, method replacedly can be expressed as such as a series of correlation behaviors or event in state diagram.In addition, according to one or more embodiment, do not need all illustrated actions to come implementation method.

With reference to figure 9, illustrated is the method 900 that helps generating power control command in wireless communications environment.At 902 places, can be from the receiving uplink transmission that accesses terminal.For example, this ul transmissions can be physical uplink link sharing channel (PUSCH) transmission.According to another illustrative examples, this ul transmissions can come from the one group of periodicity ul transmissions that is accessed terminal and sent by this; Similarly, this periodicity ul transmissions can be detection reference signal (SRS) transmission, quality channel designator (CQI) transmission, physical uplink control channel (PUCCH) transmission etc.At 904 places, can judge whether to adjust the uplink power level that this accesses terminal and uses.The uplink power level of analyzing is relevant to the ul transmissions that receives.According to an example, this uplink power level and desired value can be compared, and if difference surpasses threshold value, so just can trigger adjustment; Otherwise, if difference less than threshold value, is adjusted with regard to not needing so at this moment.In addition, can determine adjustment quantity to the uplink power level that accesses terminal.According to another illustrative examples, can service quality measure to estimate to determine whether to adjust uplink power level based on the broadband reception power of constructing or signal to noise ratio (SNR), wherein, broadband reception power or signal to noise ratio (SNR) estimate it is that set (for example, the set of institute's receiving uplink transmission can comprise the signal that periodically sends such as PUCCH, SRS etc., such as the irregular signal etc. of transmission such as PUSCH) according to the institute's receiving uplink transmission that sends by accessing terminal is constructed on up link.If definite adjustment that does not need uplink power level at 904 places, method 900 finishes so.If determine at 904 places and adjust uplink power level, method 900 continues at 906 places so.At 906 places, can use for down link (DL) distribute and 1/ layer of 2 (L1/L2) control information channel of layer of up link (UL) license with power control command transmitting to accessing terminal, with the change uplink power level.For example, can by measuring (for example, in the measurement that the received power level outside the border is set) or being used for the chance (for example, because the transmission of UL license) of transmission power control commands, trigger the transmission of power control command.Based at the determining of 904 places, transmission power control commands as required.Like this, can be when needed at the upper transmission power control commands of available channel (relative with fixing predeterminated position and channel).For example, can be on the time subset, PDCCH (when available) upper distribute with DL or UL permit together with transmission power control commands; And can go up At All Other Times, upward transmit power control command at TPC-PDCCH (when available).Each power control command can be single-bit proofread and correct (for example, up/down, ± 1dB ...) and/or many bit correction (for example, 0dB, ± 1dB, ± 2dB, ± 3dB, ± 4dB ...).In addition, power control command can be mapped to physical downlink control channel (PDCCH) or the right particular instance of PDCCH/PDSCH (physical down link sharing channel).In addition, can send independently or transmission power control commands in the band together with other transfer of data.In addition, for example, can be via the unicast transmission transmission power control commands.

Can be in a plurality of positions the delivering power control command.For example, can be on PDCCH distribute with DL or UL permit together with transmission power control commands.For example, can be via PDCCH transmission power control commands together with DL distributes, this DL distributes can be relevant with PUCCH.In addition, can be via PDCCH transmission power control commands together with UL permits, this UL license can be relevant with PUSCH.According to another illustrative examples, can send above-mentioned power control command (for example, transmitting power control-physical downlink control channel (TPC-PDCCH)) together with being used for a plurality of a plurality of power control commands that access terminal on PDCCH.Similarly, PDCCH can be that L1/L2 control information channel is (for example, for LTE ...).Like this, a TPC-PDCCH can be relevant to PUCCH, and the 2nd TPC-PDCCH can be relevant to PUSCH (for example, its PUSCH to lasting scheduling is relevant especially).By the mode of another example, can also send periodically updating of uplink power level on the basis of irregularly adjusting.

Turn to Figure 10, illustrated is the method 1000 that helps to use power control command in wireless communications environment.At 1002 places, can send data on up link with a certain power level.For example, can send data on PUSCH; Like this, can send aperiodically data.According to another example, can periodically send transfer of data (for example, with relevant such as one group of cyclical transmission of SRS transmission, CQI transmission, PUCCH transmission etc.).At 1004 places, can receive power control command via being used for 1/ layer of 2 (L1/L2) control information channel of layer that down link (DL) distributes and up link (UL) is permitted.In case trigger condition appears or according to the chance that is used for transmission power control commands (for example, because the transmission of UL license), can be on down link transmission power control commands.For example, compare with using fixing, default position and the technology of channel delivering power control command, can pass through when needed down link delivering power control command on available channel.According to this example, can on the very first time, obtain power control command together with DL distribution or UL license on PDCCH, and on the different time, can receive power control command on TPC-PDCCH.In addition, can be at e Node B receiver place, based on according to the signal set that sends on up link (for example, being in 1002 the data that send on up link) the broadband reception power of constructing or signal to noise ratio (SNR) estimate, is created on the power control command that sends on L1/L2 control information channel.Power control command can be single-bit order and/or many bits command.In addition, can be via PDCCH or PDCCH/PDSCH to obtaining power control command.In addition, can be used as independent transmission and receive power control command, perhaps receive power control command in the band together with other data that send from the base station.Mode by another explanation, can receive power control command in a plurality of positions, that is to say, can distribute with DL on PDCCH or the UL license together with obtain and/or on PDCCH be used for a plurality of power control commands that access terminal and (for example, TPC-PDCCH) obtain together power control command.According to this illustrative examples, can be relevant with PUCCH via the power control command that PDCCH and DL distribution obtain together, and permit that via PDCCH and UL the power control command that receives together can be relevant with PUSCH.According to another example, can use two TPC-PDCCH: can use first TPC-PDCCH that the power control command relevant with PUCCH is provided, and can use second TPC-PDCCH to transmit the power control command (for example, it especially can to the PUSCH of lasting scheduling relevant) relevant with PUSCH.At 1006 places, can change power level based on power control command.In addition, when not obtaining power control command, do not need to carry out this change to power level.According to another example, no matter whether receive and use power control command that power level is adjusted, can use open Loop Power control mechanism to change power level.At 1008 places, can on up link with the power level sending data after changing.In addition, can be at special time with first power level sending data, and receive power control command as response, and the next transfer of data on up link can be used first power level.By the mode of another example, can also receive periodically updating uplink power level on the basis of irregularly adjusting.

According to one or more aspects described herein, will recognize, can make inference about using irregular power control command.As used herein, general, term " deduction " or " inference " refer to the process of from a series of observations of catching via event and/or data, system, environment and/or User Status being carried out inference or deduction.For example, can use inference that specific context or behavior are identified, perhaps can generate the probability distribution of state.Inference can be probable property, that is to say, based on considering the calculating to the probability distribution of states of interest of data and event.Inference can also refer to for the technology from sequence of events and/or data composition higher level event.No matter whether event is relevant in the time at close proximity, and no matter event and data are from one or several events and data source, and this inference all causes building new event or behavior from a series of events that observe and/or the event data of storing.

According to an example, above given one or more methods can comprise and making about determine whether the inference of transmission power control commands based on the transmission that receives in the place, base station.By the mode that further illustrates, can make the inference of the power control command that is just sending being intercepted about determining when on down link.To recognize, previous example is illustrative in itself, and is not the number of wanting to limit the inference that can make in conjunction with each embodiment described herein and/or method, and is not to want to limit the mode of making these inferences.

Figure 11 is 1100 the explanation of accessing terminal, and accesses terminal 1100 to help to use irregular power control command in based on the wireless communication system of LTE.Access terminal and 1100 comprise receiver 1102, for example, it receives signal and the signal that receives is carried out typical operation (for example, filtering, method, down conversion etc.) and the signal after regulating is carried out digitlization from the reception antenna (not shown), in order to obtain sampling.For example, receiver 1102 can be the MMSE receiver, and can comprise demodulator 1104, and demodulator 1104 can carry out to the symbol that receives demodulation and they are offered processor 1106 being used for channel estimating.Processor 1106 can be to be exclusively used in the information that receiver 1102 is received to analyze and/or generate the processor that is used for by the information of transmitter 1106 transmissions, can be the processor that 1100 the one or more assemblies of accessing terminal are controlled, and/or can be that the information that receiver 1102 receives is analyzed, generated for the information that sends by transmitter 1116 and processor that 1100 the one or more assemblies of accessing terminal are controlled.

In addition, accessing terminal 1100 can comprise memory, it is operatively connected processor 1106 and it can be stored the data that will send, the data that receive, distribute to access terminal 1100 identifier, the information relevant to the irregular power control command that obtains and any other the suitable information that is used for selecting whether to carry out irregular power control command.In addition, memory 1108 can store to explaining irregular power control command whether point to 1100 relevant agreement and/or the algorithms that access terminal.

To recognize, data storage described herein (for example, memory 1108) can be volatile memory or nonvolatile memory, perhaps can comprise volatibility and nonvolatile memory.By the mode of explanation rather than restriction, nonvolatile memory can comprise read-only memory (ROM), programming ROM (PROM), electrically programmable ROM (EPROM), electric erasable PROM (EEPROM) or flash memory.Volatile memory can comprise random access storage device (RAM), and it can be used as the external cache memory.By the mode of explanation rather than restriction, RAM is available in the many forms such as synchronous random access memory (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate SDRAM (DDR SDRAM), enhancing SDRAM (ESDRAM), synchronization link DRAM (SLDRAM) and direct Rambus RAM (DRRAM).The memory 1108 of thematic system and method is the memory of wanting to comprise these and any other suitable type, rather than will be limited to this.

Receiver 1102 can also be operatively connected UL power manager 1110, it is 1100 that use to accessing terminal, be used for controlling via the power level that up link sends.UL power manager 1110 can be provided for via the uplink channel of any type as sending the uplink power level of data, control signal etc.UL power manager 1110 can use open loop mechanism to be used for selecting uplink power level.In addition, receiver 1102 and UL power manager 1110 can be connected to irregular order receiver 1112, it is estimated the irregular power control command that obtains by receiver 1102.Irregularly when order receiver 1112 has been explained access terminal 1100 irregular power control command of sensing has been intercepted.In addition, order irregularly that receiver 1112 is determined decode to specific irregularly power control command, use etc.In addition, irregularly order receiver 1112 (and/or UL power manager 1110) to change according to irregular power control command 1110 uplink power level of using that access terminal.Accessing terminal 1100 also comprises modulator 1114 and transmitter 1116, and for example, transmitter 1116 sends signal to the base station, another accesses terminal etc.Although be described as separating with processor 1106, will recognize, UL power manager 1110, irregularly to order receiver 11112 and/or modulator 1114 can be the part of processor 1106 or a plurality of processor (not shown).

Figure 12 is the explanation of system 1200, and system 1200 helps to produce irregular power control command in based on the wireless communications environment of LTE.System 1200 (for example comprises base station 1202, access point), it has receiver 1210 and transmitter 1224, receiver 1210 receives from one or more signals of 1204 of accessing terminal by 1206 pairs of a plurality of reception antennas, and transmitter 1,222 1204 sends to one or more accessing terminal by transmitting antenna 1208.Receiver 1210 can be from reception antenna 1206 reception information, and operationally are associated with the demodulator 1212 that the information that receives is carried out demodulation.symbol after 1214 pairs of demodulation of processor is analyzed, processor 1214 can be similar to top about the described processor of Figure 11, and be connected to memory 1216,1216 pairs of memories (for example accord with access terminal identification, MACID ...) relevant information, the data that will send to or receive from access terminal 1204 (perhaps different base station (not shown)) (for example, irregular power control command ...), and/or various operations with function relevant any other suitable information given to carrying out this paper is stored.Also processor 1214 is connected to received power monitor 1218, its message reference that obtains based on 1202 places in the base station 1204 uplink power level of using that access terminal.For example, received power monitor 1218 can be to analyzing from the uplink power level of PUSCH transmission.According to another illustrative examples, received power monitor 1218 can be to estimating from the uplink power level of periodicity ul transmissions.

Received power monitor 1218 can be operatively connected irregular adjuster 1220, it changes estimated uplink power level as required.Can trigger based on the appearance of predetermined condition the adjustment that irregular adjuster 1220 carries out, can identify this predetermined condition based on measuring.In addition, when thinking that when needing these to adjust, irregularly adjuster 1220 can determine that what carry out to uplink power level adjusts.In addition, irregularly adjuster 1220 can generate irregular power control command, then irregular power control command transmitting can be accessed terminal 1204 to the corresponding of expection.In addition, irregular adjuster 1220 can be operatively connected modulator 1222.Modulator 1222 can carry out irregular power control command multiplexing, accesses terminal 1204 to be transferred to via antenna 1208 by transmitter 1226.Although be described as separating with processor 1214, will recognize, received power monitor 1218, irregular adjuster 1220 and/or modulator 1222 can be the parts of processor 1214 or a plurality of processor (not shown).

Figure 13 shows example wireless communications 1300.For easy, wireless communication system 1300 has been described a base station 1310 and one and has been accessed terminal 1350.Yet, to recognize, system 1300 can comprise more than a base station and/or more than one and accessing terminal, wherein, and extra base station and/or access terminal and can and access terminal 1350 similar in fact or different from following described exemplary base 1310.In addition, will recognize, base station 1310 and/or access terminal and 1350 can use system described herein (Fig. 1-5,11-12 and 14-15) and/or method (Fig. 9-10) is in order to help radio communication therebetween.

1310 places in the base station will offer transmission (TX) data processor 1314 from data source 1312 for the business datum of a plurality of data flow.According to an example, can send each data flow on each antenna.The specific coding scheme that TX data processor 1314 is based upon this data flow selection formats, encodes and interweave this business data flow, in order to the data after coding are provided.

Can use OFDM (OFDM) technology to carry out multiplexing for the data after the coding of each data flow and pilot data.In addition or replacedly, can carry out frequency division multiplexing (FDD), time division multiplexing (TDM) or code division multiplexing (CDM) to frequency pilot sign.Typically, pilot data is the known data patterns of processing in a known way, and can use in order to channel response is estimated at 1350 places that access terminal.(for example can be based upon the certain modulation schemes of each data flow selection, binary phase shift keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM) etc.) (for example modulate to the pilot tone after multiplexing with for the data after the coding of this data flow, sign map), in order to modulation symbol is provided.Can be performed by processor 1330 or instruction that provide be identified for data rate, coding and the modulation of each data flow.

The modulation symbol that is used for data flow can be offered TX MIMO processor 1320, it can be further processed to modulation symbol (for example, being used for OFDM).Subsequently, TX MIMO processor 1320 offers NT transmitter (TMTR) 1322a to 1322t with NT stream of modulation symbols.In each embodiment, TX MIMO processor 1320 is applied to data symbol stream with the beam forming weighting, and is applied to send from it antenna of symbol.

Each transmitter 1322 receives and processes each symbol stream, in order to one or more analog signals are provided, and analog signal is further regulated (for example, amplification, filtering and up conversion), in order to the modulation signal that is suitable for transmitting is provided on mimo channel.In addition, NT the modulation signal of the machine of spontaneous emission in the future 1322a to 1322t sends from NT antenna 1324a to 1324t respectively.

At 1350 places that access terminal, by NR antenna 1352a to 1352r, the modulation signal that sends is received, and will offer each receiver (RCVR) 1354a to 1354r from the signal that each antenna 1352 receives.Each receiver 1354 is regulated (for example, filtering, amplification and down conversion) to each signal, and the signal after regulating is carried out digitlization in order to sampling is provided, and further sampling is processed in order to corresponding " reception " symbol stream is provided.

RX data processor 1360 can receive and process NR receiving symbol stream from NR receiver 1354 based on specific receiver treatment technology, so that NT " detecting " symbol stream to be provided.RX data processor 1360 can carry out demodulation, deinterleaving and decoding to each detected symbol stream, in order to recover to be used for the business datum of this data flow.The processing of RX data processor 1360 is with the performed processing of the TX MIMO processor 1320 at 1310 places and TX data processor 1314 is complementary in the base station.

Processor 1370 can periodically determine to use which kind of available techniques as discussed above.In addition, processor 1370 can generate the reverse link message that comprises matrix index part and order value part.

That reverse link message can comprise is various types of, about the information of communication link and/or receiving data stream.Can process by 1338 pairs of reverse link message of TX data processor, modulate by 1380 pairs of reverse link message of modulator, 1354a to 1354r regulates reverse link message by transmitter, and base station 1310 is returned in the reverse link message transmission; Wherein, TX data processor 1338 can also receive the business datum that is used for a plurality of data flow from data source 1336.

1310 places in the base station, receive from 1350 the modulation signal of accessing terminal by 1324 pairs, antenna, adjusted by receiver 1322, by demodulator 1340, it is carried out demodulation, and by RX data processor 1342, it is processed, in order to extract by 1350 reverse link message that send that access terminal.In addition, processor 1330 can be processed the message of extracting, in order to determine to use which pre-coding matrix to determine the beam forming weight.

Processor 1330 and 1370 can indicate respectively (for example, control, adjusting, management etc.) in the base station 1310 and the operation at 1350 places of accessing terminal.Each processor 1330 and 1370 can be to program code stored relevant with memories 1332 and 1372 data.Processor 1330 and 1370 can also be carried out calculating, in order to obtain being respectively used to frequency and the impulse response estimation of up link and down link.

To be appreciated that, can realize embodiment described herein in hardware, software, firmware, middleware, microcode or its any combination.Realize for hardware, can be at one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processor (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, other is designed to carry out in the electronic unit of function described herein or its combination and realizes processing unit.

When realizing these embodiment in software, firmware, middleware or microcode, program code or code segment, they can be stored in the machine readable media such as memory module.Code segment can represent any combination of process, function, subprogram, program, routine, subroutine, module, software kit, class or instruction, data structure or program statement.Can code segment be connected to another code segment or hardware circuit by transmission and/or reception information, data, variable, parameter or memory content.Can use any suitable means that comprise Memory Sharing, message transmission, token passing, Internet Transmission etc. that information, variable, parameter, data etc. are transmitted, forward or send.

Realize for software, can realize technology described herein with the module of carrying out function described herein (such as program, function etc.).Software code can be stored in memory cell, and carry out this software code by processor.Can be in processor inside or the processor outside realize memory cell, in this case, can memory cell be communicated to connect processor via various means as known in the art.

With reference to Figure 14, illustrated is system 1400, and it makes it possible to produce the power control command that accesses terminal and use for wireless communications environment.For example, system 1400 can be positioned at the base station at least in part.To recognize, and system 1400 is expressed as will comprise the function square frame, it can be the function square frame of the function that represents that processor, software or its combination (for example, firmware) realize.System 1400 comprise can crew-served electronic building brick logical groups 1402.For example, logical groups 1402 can comprise the electronic building brick 1404 for the ul transmissions that obtains to send with uplink power level from accessing terminal.In addition, logical groups 1402 can comprise for the electronic building brick 1406 of estimating the uplink power level that whether changing accesses terminal uses.In addition, logical groups 1402 can comprise for come the electronic building brick 1408 of transmission power control commands via the L1/L2 control information channel that is used for down link (DL) distribution and up link (UL) license, wherein, power control command is used for uplink power level is adjusted specific quantity.For example, can generate as required and transmission power control commands.In addition, system 1400 can comprise memory 1410, and it preserve to be used for carries out the instruction to electronic building brick 1404,1406 and 1408 relevant functions.Although be expressed as in memory 1410 outsides, will understand, one or more electronic building bricks 1404,1406 and 1408 may reside in memory 1410.

Turn to Figure 15, illustrated is system 1500, and it makes it possible to use power control command in wireless communications environment.For example, system 1500 can be positioned at and access terminal.As described, system 1500 comprises a plurality of function square frames, and it can represent the function that realizes by processor, software or its combination (for example, firmware).System 1500 comprise can crew-served electronic building brick logical groups 1502.Logical groups 1502 can comprise for send the electronic building brick 1504 of data on up link with power level.In addition, logical groups 1502 can comprise for down link (DL) distributes and the electronic building brick 1506 of the L1/L2 control information channel acquisition power control command of up link (UL) license via being used for.In addition, logical groups 1502 can comprise for change the electronic building brick 1508 of the power level that is used for subsequent data transmission according to power control command.According to another explanation, in addition or replacedly, can change the power level that is used for subsequent data transmission based on open Loop Power control mechanism.In addition, system 1500 can comprise memory 1510, and it preserve to be used for carries out the instruction to electronic building brick 1504,1506 and 1508 relevant functions.Although be expressed as in memory 1510 outsides, will understand, electronic building brick 1504,1506 and 1508 may reside in memory 1510.

The above has described the example that comprises one or more embodiment.Certainly, can not be for purpose that previous embodiment the is described line description that is combined into to every kind of possible assembly or method, but those skilled in the art will appreciate that, be possible to many further combination and the displacement of each embodiment.Therefore, described embodiment is change, the modifications and variations of wanting to comprise in all these spirit and scope that fall into claims.In addition, as for describe in detail or claim in use term " to comprise ", this term is that to want to be similar to the explanation that the term when using in the claims as the transition word " comprises " such, what expression was open comprises.

Claims (82)

1. method that helps in wireless communications environment to produce power control command comprises:

From the receiving uplink transmission that accesses terminal;

Determine whether to adjust the described uplink power level that accesses terminal and use; And

Use to be used for that down link (DL) distributes and layer of 1/ layer 2 (L1/L2) control information channel of up link (UL) license accesses terminal to change described uplink power level with power control command transmitting to described.

2. the method for claim 1, wherein described ul transmissions is physical uplink link sharing channel (PUSCH) transmission.

3. the method for claim 1, wherein described ul transmissions comes from the described one group of periodicity ul transmissions that accesses terminal and send.

4. the method for claim 1 also comprises:

Described uplink power level and target are compared; And

Just trigger when the difference between described uplink power level and described target surpasses threshold value and adjust.

5. the method for claim 1, also comprise the adjustment quantity of determining described uplink power level, and described quantity is included in described power control command.

6. the method for claim 1, also comprise sending as required described power control command.

7. the method for claim 1, described power control command are that the single-bit of described uplink power level is proofreaied and correct.

8. the method for claim 1, described power control command is the many bit correction to described uplink power level.

9. the method for claim 1 also comprises at least one the particular instance that described power control command is mapped to physical downlink control channel (PDCCH) or physical downlink control channel/physical down link sharing channel (PDCCH/PDSCH) centering.

10. the method for claim 1, also comprise described power control command is sent as independent transmission.

11. the method for claim 1 also comprises described power control command is with interior transmission together with the different pieces of information transmission.

12. the method for claim 1 also is included on 1/ layer of 2 (L1/L2) control information channel of described layer that can use when transmitting and sends where necessary described power control command.

13. the method for claim 1 also comprises:

According to the ul transmissions structural wideband received power that receives estimate or signal-to-noise ratio (SNR) estimation at least one; And

Based on described broadband reception power estimate or described signal-to-noise ratio (SNR) estimation in described at least one determine whether to adjust described uplink power level.

14. the method for claim 1, also comprise via physical downlink control channel (PDCCH) sending described power control command together with downlink allocation, described power control command is relevant to physical uplink control channel (PUCCH).

15. the method for claim 1, also comprise via physical downlink control channel (PDCCH) sending described power control command together with the up link license, described power control command is relevant to physical uplink link sharing channel (PUSCH).

16. the method for claim 1, also comprise via at least one transmitting power control-physical downlink control channel (TPC-PDCCH) from be used at least one different power control command that access terminal and send together described power control command.

17. the method for claim 1 also is included on the basis of irregular adjustment and also sends periodically updating described uplink power level.

18. a radio communication device comprises:

The received power monitor is used for obtaining with the ul transmissions of uplink power level from accessing terminal and sending; And

The up-link power adjuster is used for: explain whether change described uplink power level; The amount that estimation is adjusted described uplink power level when described uplink power level is changed; And via 1/ layer of 2 (L1/L2) control information channel of layer that distributes for down link (DL) and up link (UL) license is used, power control command transmitting is accessed terminal to described, to change described uplink power level.

19. radio communication device as claimed in claim 18, wherein, described ul transmissions is physical uplink link sharing channel (PUSCH) transmission.

20. radio communication device as claimed in claim 18, wherein, described ul transmissions comes from the described one group of periodicity ul transmissions that accesses terminal and send.

21. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also is used for described uplink power level and target power level are compared, and just triggers when the difference between described uplink power level and described target power level surpasses threshold value and adjust.

22. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also is used for sending as required described power control command.

23. radio communication device as claimed in claim 18, wherein, described power control command comprises to be proofreaied and correct the single-bit of described uplink power level.

24. radio communication device as claimed in claim 18, wherein, described power control command comprises the many bit correction to described uplink power level.

25. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also is used for described power control command is mapped at least one particular instance of physical downlink control channel (PDCCH) or physical downlink control channel/physical down link sharing channel (PDCCH/PDSCH) centering.

26. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also is used for described power control command at least a transmission the in the following manner: send as independently transmitting, perhaps be with interior transmission together with the different pieces of information transmission.

27. radio communication device as claimed in claim 18, wherein, on 1/ layer of 2 (L1/L2) control information channel of described layer that described up-link power adjuster also is used for can using when transmission and send where necessary described power control command.

28. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also is used for according to the ul transmissions structural wideband received power estimation that obtains or at least one of signal-to-noise ratio (SNR) estimation, and whether changes described uplink power level based on described at least one explanation in described broadband reception power estimation or described signal-to-noise ratio (SNR) estimation.

29. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also is used for sending described power control command via physical downlink control channel (PDCCH) together with downlink allocation, and described power control command is relevant to physical uplink control channel (PUCCH).

30. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also is used for sending described power control command via physical downlink control channel (PDCCH) together with the up link license, and described power control command is relevant to physical uplink link sharing channel (PUSCH).

31. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also be used for via at least one transmitting power controls-physical downlink control channel (TPC-PDCCH) from send together described power control command at least one different power control command that access terminal.

32. radio communication device as claimed in claim 18, wherein, described up-link power adjuster also is used for also sending periodically updating described uplink power level on the basis of irregularly adjusting.

33. the radio communication device that can be created in the power control command that uses by accessing terminal in wireless communications environment comprises:

Be used for obtaining with the module of uplink power level from the ul transmissions of the transmission that accesses terminal;

For assessment of the module that whether changes the described described uplink power level used of accessing terminal; And

Be used for via the module that is 1/ layer of 2 (L1/L2) control information channel transmission power control command of layer that down link (DL) distributes and up link (UL) license is used, described power control command is specifically measured described uplink power level adjustment.

34. radio communication device as claimed in claim 33, wherein, described ul transmissions be following at least one: physical uplink link sharing channel (PUSCH) transmission or come from by described send the one group periodically transmission in ul transmissions that accesses terminal.

35. radio communication device as claimed in claim 33 also comprises:

Be used for module that described uplink power level and target are compared; And

Be used for just triggering the module of adjusting when the difference between described uplink power level and described target surpasses preset value.

36. radio communication device as claimed in claim 33 also comprises for the module that sends as required described power control command.

37. radio communication device as claimed in claim 33, wherein, described power control command comprises to be proofreaied and correct the single-bit of described uplink power level.

38. radio communication device as claimed in claim 33, wherein, described power control command comprises the many bit correction to described uplink power level.

39. radio communication device as claimed in claim 33 also comprises at least one the module of particular instance that described power control command is mapped to physical downlink control channel (PDCCH) or physical downlink control channel/physical down link sharing channel (PDCCH/PDSCH) centering.

40. radio communication device as claimed in claim 33 also comprises for at least a module that send of described power control command according to following manner: send or be with interior transmission together with the different pieces of information transmission as transmission independently.

41. radio communication device as claimed in claim 33 also comprises on 1/ layer of 2 (L1/L2) control information channel of described layer that can use in when transmission and the module that sends where necessary described power control command.

42. radio communication device as claimed in claim 33, also comprise for estimate according to the ul transmissions structural wideband received power that obtains or at least one of signal-to-noise ratio (SNR) estimation to be used for estimating whether to change the module of described uplink power level.

43. radio communication device as claimed in claim 33, comprise that also described power control command is relevant to physical uplink control channel (PUCCH) for sending the module of described power control command via physical downlink control channel (PDCCH) together with downlink allocation.

44. radio communication device as claimed in claim 33, comprise that also described power control command is relevant to physical uplink link sharing channel (PUSCH) for send the module of described power control command together with the up link license via physical downlink control channel (PDCCH).

45. radio communication device as claimed in claim 33 also comprises for via at least one transmitting power control-physical downlink control channel (TPC-PDCCH) and the module that is used at least one different power control command that access terminal and sends together described power control command.

46. radio communication device as claimed in claim 33 wherein, also comprises for the module that periodically updates that also sends on the basis of irregularly adjusting described uplink power level.

47. a method that helps to use power control command in wireless communications environment comprises:

Send data on up link with power level;

Via 1/ layer of 2 (L1/L2) control information channel received power control command of layer of distributing for down link (DL) and up link (UL) license is used;

Change described power level based on described power control command; And

Send data with the power level after described change on described up link.

48. method as claimed in claim 47, wherein, line link shared channel (PUSCH) upward sends described data physically.

49. method as claimed in claim 47, wherein, described power control command is the single-bit order.

50. method as claimed in claim 47, wherein, described power control command is many bits command.

51. method as claimed in claim 47 wherein, sends described power control command on 1/ layer of 2 (L1/L2) control information channel of described layer when trigger condition occurring.

52. method as claimed in claim 47 also comprises the described power control command of at least one reception via physical downlink control channel (PDCCH) or physical downlink control channel/physical down link sharing channel (PDCCH/PDSCH) centering.

53. method as claimed in claim 47 also comprises described power control command according at least a reception the in following manner: receive or be with together interior reception from different transfer of data as transmission independently.

54. method as claimed in claim 47 also comprises the constant power level of use when not receiving described power control command.

55. method as claimed in claim 47 also comprises whether receiving described power control command all by using open Loop Power control mechanism that described power level is adjusted.

56. method as claimed in claim 47 receives described power control command on 1/ layer of 2 (L1/L2) control information channel of described layer that also comprises when in case of necessity, can use when transmission.

57. method as claimed in claim 47, also comprise via physical downlink control channel (PDCCH) together with downlink allocation, described power control command being received, described power control command is to the upper transmission of line link control channel (PUCCH) data are relevant physically.

58. method as claimed in claim 47, also comprise via physical downlink control channel (PDCCH) together with the up link license, described power control command being received, described power control command is to the upper transmission of line link shared channel (PUSCH) data are relevant physically.

59. method as claimed in claim 47, also comprise via at least one transmitting power control-physical downlink control channel (TPC-PDCCH) from be used at least one different power control command that access terminal and together described power control command received.

60. method as claimed in claim 47 also is included on the basis of irregular adjustment and also receives periodically updating described power level.

61. a radio communication device comprises:

Transmitter is used for sending on up link with power level data; And

The up-link power manager is used for: obtain power control command via 1/ layer of 2 (L1/L2) control information channel of layer that distributes for down link (DL) and up link (UL) license is used; And be that subsequent data transmission is adjusted described power level based on described power control command.

62. radio communication device as claimed in claim 61, wherein, line link shared channel (PUSCH) upward sends described data physically.

63. radio communication device as claimed in claim 61 wherein, when trigger condition occurring, sends described power control command on 1/ layer of 2 (L1/L2) control information channel of described layer.

64. radio communication device as claimed in claim 61, wherein, described up-link power manager also is used for the described power control command of at least one acquisition via physical downlink control channel (PDCCH) or physical downlink control channel/physical down link sharing channel (PDCCH/PDSCH) centering.

65. radio communication device as claimed in claim 61, wherein, described up-link power manager also is used for described power control command at least a acquisition the in the following manner: obtain or be with interior acquisition together with the different pieces of information transmission as independently transmitting.

66. radio communication device as claimed in claim 61, wherein, described up-link power manager also is used for no matter whether receiving described power control command, all by using open Loop Power control mechanism that described power level is adjusted.

67. radio communication device as claimed in claim 61 wherein, obtains described power control command on 1/ layer of 2 (L1/L2) control information channel of described layer that described up-link power manager also is used for when in case of necessity, can uses when transmission.

68. radio communication device as claimed in claim 61, wherein, described up-link power manager also is used for obtaining described power control command via physical downlink control channel (PDCCH) together with downlink allocation, and described power control command is relevant to subsequent data transmission on line link control channel (PUCCH) physically.

69. radio communication device as claimed in claim 61, wherein, described up-link power manager also is used for obtaining described power control command via physical downlink control channel (PDCCH) together with the up link license, and described power control command is relevant to subsequent data transmission on line link shared channel (PUSCH) physically.

70. radio communication device as claimed in claim 61, wherein, described up-link power manager also be used for via at least one transmitting power controls-physical downlink control channel (TPC-PDCCH) from obtain together described power control command at least one different power control command that accesses terminal.

71. radio communication device as claimed in claim 61, wherein, described up-link power manager also is used for also receiving periodically updating described power level on the basis of irregularly adjusting.

72. a radio communication device, it makes it possible to use power control command in wireless communications environment, comprising:

Be used for sending on up link with power level the module of data;

Be used for obtaining via 1/ layer of 2 (L1/L2) control information channel of layer that distributes for down link (DL) and up link (UL) license is used the module of power control command; And

Be used for changing according to described power control command the module of the described power level that is used for subsequent data transmission.

73. radio communication device as described in claim 72 also comprises for the upper module that sends described data of line link shared channel (PUSCH) physically.

74. radio communication device as described in claim 72 wherein, when trigger condition occurring, sends described power control command on 1/ layer of 2 (L1/L2) control information channel of described layer.

75. radio communication device as described in claim 72 also comprises for obtaining the module of described power control command via at least one of physical downlink control channel (PDCCH) or physical downlink control channel/physical down link sharing channel (PDCCH/PDSCH) centering.

76. radio communication device as described in claim 72 also comprises at least a module that obtains in the following manner with described power control command: obtain or be with interior acquisition together with the different pieces of information transmission as transmission independently.

77. radio communication device as described in claim 72 also comprises for no matter whether obtaining described power control command in preset time, all passes through to use open Loop Power control mechanism to change the module of described power level.

78. radio communication device as described in claim 72 also comprises for obtain the module of described power control command on 1/ layer of 2 (L1/L2) control information channel of described layer that can use when in case of necessity, when transmitting.

79. radio communication device as described in claim 72, also comprise for obtaining the module of described power control command via physical downlink control channel (PDCCH) together with downlink allocation, described power control command is relevant to subsequent data transmission on line link control channel (PUCCH) physically.

80. radio communication device as described in claim 72, also comprise for obtaining the module of described power control command together with the license of physical downlink control channel (PDCCH) and up link, described power control command is relevant to subsequent data transmission on line link shared channel (PUSCH) physically.

81. radio communication device as described in claim 72 also comprises for via at least one transmitting power control-physical downlink control channel (TPC-PDCCH) and the module that is used at least one different power control command that accesses terminal and obtains together described power control command.

82. radio communication device as described in claim 72 also comprises for the module that periodically updates that also obtains on the basis of irregularly adjusting described power level.

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