CN107124754A - For LTE based on leading up-link power control - Google Patents

Abstract

System and method are described, it helps to use power control preamble in a wireless communication environment with close-loop power control technology.Up-link license (for example, first up-link license) after uplink inactivity can be transmitted on the uplink, and as the response permitted the up-link, can on uplink transmit power control it is leading.According to an example, the transmission of power control preamble can be carried out clearly to dispatch and/or implicit scheduling.Can be leading using transmit power control in power level determined by open Loop Power control mechanism as access terminal.Base station can be analyzed power control preamble, and generates power control command based on the analysis, to be corrected to power level used in access terminal.Then, access terminal can use power control command, to be adjusted to the power level for uplink data transmission.

Description

For LTE based on leading up-link power control

It is on 2 14th, 2008 and the Chinese patent application of Application No. 20080005222.5 applying date that the application, which is, Divisional application.

Technical field

Following explanation relates generally to radio communication, and more particularly, in the channel radio based on Long Term Evolution (LTE) Up-link (UL) power level used in access terminal is controlled in letter system.

Background technology

Wireless communication system is widely used, to provide the voice that can be such as provided via this wireless communication system And/or various types of communications of data.Typical wireless communication system or network can be provided to one or more shared The multiple access of resource (for example, bandwidth, transmission power etc.).For example, system can use such as frequency division multiplexing (FDM), when Divide the various many of multiplexing (TDM), code division multiplexing (CDM), OFDM (OFDM), single carrier frequency division multiplexing (SC-FDM) etc. Location technology.In addition, system can meet the specification of third generation cooperative programme (3GPP), 3GPP Long Term Evolutions (LTE) etc..

Typically, wireless multiple-access communication system can support the communication of multiple access terminals simultaneously.Each access terminal can be with Communicated via transmission on the forward and reverse links with one or more base stations.Forward link (or downlink) is Refer to the communication link from base station to access terminal, and reverse link (or up-link) refers to from access terminal to base station Communication link.Can via single-input single-output (SISO), multiple input single output (MISO), single input and multi-output (SIMO) or Person's multiple-input and multiple-output (MIMO) system sets up the communication link.

Wireless communication system provides the sector of overlay area usually using one or more base stations and in base station.Typically Sector can send multiple data flows for broadcast, multicast and/or unicast services, wherein, some data flow can be some access The data flow of the independent reception interested of terminal.The access terminal in the sector coverage area can be used to entrained by combined-flow One, more than one or all data flows are received.Similarly, access terminal can transmit data to base station or Another access terminal.In the case where the access terminal of many transmission signal datas is close to each other, on uplink Communication, in order to produce enough signal to noise ratio (SNR) on different data rates and transmission bandwidth, Power Control is important 's.When realizing above-mentioned target, expect opening caused by the transmission for adjusting and carrying out to the power of these access terminals Pin is kept as low as possible.Reduce for supporting the expense that Power Control is adjusted to cause in all cases, especially in UL Data inactive state cycle stretch-out in the case of, it is difficult to ensure enough reception reliability ranks.

The content of the invention

In order to provide the basic comprehension to these embodiments, the simplification to one or more embodiments shown below is general State.The general introduction is not the extensive overview to all contemplated embodiments, and is neither intended to the crucial of all embodiments or again Want key element to be identified, be not intended to describe the scope of any or all embodiments.Its sole purpose is in simplified form Some concepts of one or more embodiments are provided, as to prelude detailed further given later.

According to one or more embodiments and it is corresponding open, with reference to contributing in a wireless communication environment using not Various aspects are described using power control preamble for regular close-loop power control technology.It can transmit on the uplink Up-link license (for example, first up-link license after uplink inactivity), and as to up Link license response, can on uplink transmit power control it is leading.According to an example, can clearly dispatch with And/or impliedly schedule power controls leading transmission to person.It can be determined in access terminal using open Loop Power control mechanism Transmit power control is leading in power level.Base station can be analyzed power control preamble, and based on to Power Control Leading analysis generation power control command, to be corrected to power level used in access terminal.Then, access eventually End can utilize power control command to adjust the power level for uplink data transmission.

According to related aspect, this document describes the side for helping to generate power control preamble in a wireless communication environment Method.This method can include from base station receive up-link license, the up-link license be uplink inactivity it First up-link license afterwards.In addition, this method can include using the power setting based on open Loop Power control by work( Rate control is leading to be sent to base station.In addition, this method can be included from base station receiving power control command, the power control command Power setting is adjusted.This method can also include transmitting data to base station using the power setting after adjustment.

It is related to radio communication device on the other hand.The radio communication device can include the memory for preserving instruction, this Instructing is used for：From base station acquired uplink license, up-link license is the after uplink inactivity One up-link license；Estimate to determine to be used for the power level that power control preamble is transmitted based on open loop；In the power level On power control preamble is sent to base station；From base station receiving power control command；Power is changed based on the power control command Level；And uplink data transmission is sent to base station in the power level changed according to power control command. In addition, the radio communication device can include the processor for being connected to memory, it is configured to which execution is stored in memory Instruction.

It is related to radio communication device on the other hand, it makes it possible to use before Power Control in a wireless communication environment Lead.The radio communication device can include the module for being used to obtain up-link license, and up-link license is in uplink First up-link after the inactive state of road.In addition, the radio communication device can include being used for according to open loop work( The leading module of the power level transmission up-link power control of selection is estimated in rate control.In addition, the radio communication device can With including the module for obtaining the power control command for changing power level.In addition, the radio communication device can include using In the module that uplink data is sent in power level after the change.

It is related to the machine readable media with the machine-executable instruction being stored thereon on the other hand, these machines can Execute instruction is used for：Up-link license is obtained, up-link license is first after uplink inactivity Up-link is permitted；To estimate that it is leading that the power level of selection transmits up-link power control according to open Loop Power control；Obtain The power control command of power level must be changed；And send uplink data in power level after the change.

According on the other hand, the device in wireless communication system can include processor, wherein it is possible to which processor is matched somebody with somebody It is set to from base station acquired uplink license, up-link license is to follow first after uplink inactivity Individual up-link license.Determine to be used for what power control preamble was transmitted furthermore, it is possible to which processor is configured into open loop estimation Power level.Processor can also be configured to that power control preamble is sent into base station in the power level.Furthermore, it is possible to Processor is configured to from base station receiving power control command.Furthermore it is possible to which processor is configured into Power Control life Order changes power level.Furthermore, it is possible to which processor is configured to uplink data transmission in power level after the change It is sent to base station.

According to other many aspects, this document describes contribute in a wireless communication environment in order that with Power Control pair The method that power control preamble is estimated.This method can include up-link license being sent to access terminal.In addition, side Method can include entering the power control preamble sent in the power level set based on open Loop Power control from access terminal Row is received.In addition, this method can include generating power control command, the Power Control based on the analysis to power control preamble Order and the power level of access terminal is corrected.This method can also include power control command transmitting is whole to access End.In addition, this method can include the uplink data transmission to being sent from access terminal power level after calibration Received.

The radio communication device of memory can be included by being related on the other hand, and the memory preserves instruction, these instructions For：Transmit up-link license；Acquisition is sent out with the power level determined by open Loop Power control mechanism via up-link The power control preamble sent；The Power Control for being corrected power level is produced based on the estimation to power control preamble to order Order；Via downlink transmission power control command；And obtain the uplink data sent with the power level after correcting Transmission.In addition, the radio communication device can include the processor for being connected to memory, it is configured to which execution is stored in storage Instruction in device.

It is related to radio communication device on the other hand, it makes it possible to be based on power control preamble in a wireless communication environment It is produced as the power control command that access terminal is used.The radio communication device can include being used to send on the uplink The module of line link license.In addition, the radio communication device can include being used to obtain the power to estimate to determine according to open loop The module for the power control preamble that level is sent.In addition, the radio communication device can include being used to send to enter power level The module of the power control command of row correction.In addition, the radio communication device can include being used to obtain power after calibration The module of uplink data transmission on level.

It is related to the machine readable media with the machine-executable instruction being stored thereon on the other hand, these machines can Execute instruction is used for：Up-link license is sent on the uplink；Obtain to estimate that the power level determined is sent out according to open loop The power control preamble sent；Send the power control command being corrected to power level；And the power of acquisition after calibration Uplink data transmission on level.

According on the other hand, the device in wireless communication system can include processor, wherein it is possible to which processor is matched somebody with somebody It is set to and up-link license is sent to access terminal.Processor can also be configured to from access terminal based on open loop work( The power control preamble sent in the power level that rate control is set is received.Furthermore, it is possible to which processor is configured to Analysis to power control preamble generates power control command, and the power control command carries out school to the power level of access terminal Just.Furthermore, it is possible to which processor is configured to power control command transmitting to access terminal.Furthermore it is possible to which processor is configured To be received to the uplink data transmission sent from access terminal power level after calibration.

In order to realize foregoing and related objective, one or more embodiments include absolutely proving thereafter and in claim In the feature that particularly points out.Following explanation and accompanying drawing set forth in detail some illustrative aspects of one or more embodiments.So And, these aspects illustrate only some in the various ways that can use multiple embodiment principles, and described reality Example is applied to be intended to include the equivalent of all these aspects and they.

Brief description of the drawings

Fig. 1 is the explanation to wireless communication system according to various aspects given in this article；

Fig. 2 is the explanation of example system, and the example system is to access terminal institute in the wireless communications environment based on LTE The uplink power level used is controlled；

Fig. 3 is the explanation of example system, and the example system is to uplink power level used in access terminal Periodically it is corrected；

Fig. 4 is the explanation of example system, and the example system is in the wireless communications environment based on LTE by Power Control Order is aperiodically sent to access terminal；

Fig. 5 is the explanation of example system, and the example system is in the wireless communications environment based on LTE using before being based on The up-link power control led；

Fig. 6 is the explanation of example system, and the example system is for transmission power control command pair on the uplink Access terminal is grouped；

Fig. 7 is the explanation for power control command to be sent to the example transmission structure of each access terminal group；

Fig. 8 is the explanation of the exemplary timing chart of the periodic uplink power control process for LTE；

Fig. 9 is the explanation of the exemplary timing chart of the irregular up-link power control process for LTE；

Figure 10 is the up-link power control process for LTE for carrying out lever balance to power control preamble The explanation of exemplary timing chart；

Figure 11 is the explanation of illustrative methods, and the illustrative methods contribute in the channel radio based on Long Term Evolution (LTE) The power control preamble for Power Control is generated in letter environment；

Figure 12 is the explanation of illustrative methods, and the illustrative methods contribute in the channel radio based on Long Term Evolution (LTE) The power control preamble for Power Control is estimated in letter environment；

Figure 13 is the explanation of example access terminal, and the example access terminal contributes in the radio communication based on LTE In system power control preamble is used with reference to Power Control；

Figure 14 is the explanation of example system, and the example system contributes to right in the wireless communication system based on LTE Power control preamble for Power Control is analyzed；

Figure 15 is the explanation of example wireless network environment, can be used with reference to various systems and methods described herein The example wireless network environment；

Figure 16 is the explanation of example system, and the example system makes it possible to whole based on access in a wireless communication environment The power control preamble used is held to produce power control command；

Figure 17 is the explanation of example system, and the example system makes it possible to use power control in a wireless communication environment System is leading.

Embodiment

Each embodiment is illustrated with reference now to accompanying drawing, wherein, similar reference number used throughout refers to class As element.In the description which follows, for illustrative purposes, in order to provide the thorough understanding to one or more embodiments, give Many specific details are gone out.However, it is possible to not use these specific details to realize these embodiments, this can be apparent 's.In other examples, in order to help that one or more embodiments are described, many institutes are shown in block form an Known structure and equipment.

As used in this specification, term " component ", " module ", " system " etc. be intended to refer to it is related to computer Entity, i.e. hardware, firmware, the combination of hardware and software, software or executory software.For example, component can be in processing Process, processor, object, executable, execution thread, program, and/or the computer run on device, but it is not restricted to this. By way of illustration, the application program and computing device run on the computing device can be components.One or many Individual component may reside within process and/or executable thread, and component can be located on a computer and/or divide Cloth is between two or more computers.Furthermore it is possible to from the various computer-readable mediums for being stored with various data structures Perform these components.For example, according to one or more packets (for example, from in local system, distributed system In and/or interacted with another component on the network of the internets of other system interactions such as by way of signal The data of one component) signal, these components can be communicated by way of locally and/or remotely handling.

In addition, each embodiment is described herein in conjunction with access terminal.Access terminal can be referred to as to system, user Unit, subscriber board, mobile station, mobile phone, remote station, remote terminal, mobile device, user terminal, terminal, Wireless Telecom Equipment, User agent, user equipment or user's set (UE).Access terminal can be cell phone, wireless phone, conversation initial association View (SIP) phone, WLL (WLL) are stood, personal digital assistant (PDA), the handheld device with wireless connection capability, Computing device or the other processing equipments for being connected to radio modem.In addition, base station can be being combined herein to each Embodiment is described.Base station can be used to be communicated with access terminal, and base station can also be referred to as to access point, section Point B, e node B (eNB) or some other terms.

Furthermore, it is possible to which various aspects or features described herein is embodied as into method, device or standardization program is used And/or the manufacture product of engineering technology.As used herein term " manufacture product " is intended to include and can calculated from any Machine readable device, carrier wave or the computer program of medium access.For example, computer-readable medium can include magnetic storage apparatus (for example, hard disk, floppy disk, tape etc.), CD (for example, compact disc (CD), DVD (DVD) etc.), smart card, with And flash memory device (for example, EPROM, card, rod, secret key driving etc.), but not limited to this.In addition, various storages described herein Medium can represent the one or more equipment and/or other machine readable medias for storage information." machine can for term Read medium " can include wireless channel and can store, include and/or carry instruct and/or data it is various other Medium, but it is not restricted to this.

Referring now to Figure 1, being illustrated according to multiple embodiments given in this article to wireless communication system 100.System 100 include base station 102, and base station 102 can include multiple antenna sets.For example, an antenna sets can include antenna 104 and 106, Another group can include antenna 108 and 110, and another group can include antenna 112 and 114.Show for each antenna sets Two antennas are gone out, however, it is possible to use more or less antennas for each group.In addition, base station 102 can include transmitting Chain and receiver chain, as those skilled in the art is recognized, each chain can be included and sent and received with signal again Related multiple components (for example, processor, modulator, multiplexer, demodulator, demultiplexer, antenna etc.).

The respective sectors of base station 102 can be whole with one or more accesses of such as access terminal 116 and access terminal 122 End is communicated, it will be appreciated, however, that base station 102 can be with substantial any number similar to access terminal 116 and 122 Access terminal communicated.For example, access terminal 116 and 122 can be cell phone, smart phone, laptop computer, hand Hold communication equipment, handheld computing device, satellite radio devices, global positioning system, PDA and/or in channel radio Any other suitable equipment communicated in letter system 100.As described, access terminal 116 and antenna 112 and 114 Communicated, wherein, antenna 112 and 114 will send information to access terminal 116 on forward link 118, and in reverse strand From the receive information of access terminal 116 on road 120.In addition, access terminal 122 is communicated with antenna 104 and 106, wherein, antenna 104 and 106 will send information to access terminal 122 on forward link 124, and from access terminal on reverse link 126 122 receive informations.In frequency division multiplexing (FDD) system, used for example, forward link 118 can be utilized with reverse link 120 The different frequency band of frequency band, and forward link 124 can use the frequency bands different from frequency band used in reverse link 126. In addition, in time division multiplexing (TDD) system, forward link 118 and reverse link 120 can utilize common band, and forward direction Link 124 and reverse link 126 can utilize common band.

Every group of antenna and/or the region for specifying every group of antenna to be communicated wherein can be referred to as base station 102 Sector or eNB honeycomb.For example, antenna sets can be designed as and the access in the sector of 102 overlay areas in base station Terminal is communicated.In communication on forward link 118 and 124, the transmitting antenna of base station 102 can utilize beam forming, To improve the signal to noise ratio of the forward link 118 and 124 for access terminal 116 and 122.Meanwhile, when base station 102 utilizes wave beam Shape to the access terminal 116 and 122 being randomly dispersed in whole associated coverage launched when, with pass through independent one Antenna is compared to the base station that its all access terminal is launched, and the access terminal in neighbouring honeycomb may be done by less Disturb.

For example, system 100 can be the system based on Long Term Evolution (LTE).In this system 100, the phase of base station 102 Sector is answered to control uplink power level used in access terminal 116 and 122.Therefore, system 100 can be provided Line link (UL) Power Control, the Power Control is produced to path loss and masking (for example, path loss and masking can be with Time slowly changes) compensation, and to from neighbouring cellular time-varying interference (for example, because system 100 can be employed The system based on LTE of frequency reuse rate 1) compensation.In addition, system 100 can mitigate between multiple users at base station 102 The big variation (variation) of the receiving power of acquisition in common band (for example, due to can be answered multiple users With).Compensated in addition, system 100 can be deteriorated to the multipath fading in enough low velocity.For example, for 3km/h, Channel coherency time on different carrier frequencies can be as follows：900MHz carrier frequencies can have 400ms coherence time, 2GHz carrier frequencies can have 180ms coherence time, and 3GHz carrier frequencies can have 120ms coherence time. So, the reaction time depending on adjustment and periodicity, can be corrected using low Doppler frequency to rapid fading effect.

System 100 can use the uplink for merging open Loop Power control mechanism and close-loop power control mechanism Road Power Control.According to an example, each access terminal 116,122 can be RACH using open Loop Power control (RACH) first leading setting power level of communication.Leading for first of RACH, each access terminal 116,122 can To be communicated with the downlink (DL) obtained from base station 102, and open loop mechanism can cause each access terminal 116,122 The up-link transmission power level that the received power level with the downlink communication on being obtained is inversely proportional can be selected. So, access terminal 116,122 can utilize the knowledge of downlink to be transmitted for up-link.Adjusted by real-time power Mode, open loop mechanism can allow the violent change to radio condition quickly adapt to very much (for example, depending on reception Power filter).In addition, compared with usually used conventional art, open loop mechanism can be continued to run with outside RACH processing.One Denier random access procedure success, system 100 can utilize closed loop mechanism.For example, ought be by periodic uplink resource allocation (for example, periodic uplink resource can be physical uplink control channel (PUCCH) during to access terminal 116,122 Or detection reference signal (SRS, Sounding Reference Signal) resource), technology of closed loop can be used.In addition, base The respective sectors stood in 102 (and/or networks) can be based on closed-loop control to up used in access terminal 116,122 Link transmission power is controlled.

Closed loop mechanism used in system 100 can be periodic, irregular or combination.Base station 102 In respective sectors can by periodically it is closed-loop corrected be periodically transmitted to access terminal 116,122 (for example, per 0.5ms, 1ms, 2ms, 4ms ... are sent once).For example, this can periodically depend on the periodicity that up-link is transmitted.In addition, all Phase property correction can be single bit correction (for example, up/down, ± 1dB ...) and/or many bit corrections (for example, ± 1dB、±2dB、±3dB、±4dB、……).So, power control step-size and correction periodicity can determine base station 102 (with And/or person's network) the controllable up-link power change in interior respective sectors maximum rate., can according to another example So that irregular correction is sent into corresponding access terminal 116,122 from the respective sectors in base station 102 as needed.According to The example, when by network measure value (for example, setting boundary outside reception (RX) power, send control information to Determine access terminal chance ...) triggering when, can aperiodically send these correction.In addition, irregularly correction can be single Bit and/or many bits are (for example, because the live part with the positively related expense in irregular school can be related to correction scheduling Rather than correction size, so correction can be many bits).According to another example, the respective sectors in base station 102 can be removed Also irregularly correction access terminal 116,122 will be sent to outside periodically correcting, to minimize the biography of these power adjustment Expense caused by defeated.

Turning now to Fig. 2, illustrated is system 200, and it is to the access terminal institute in the wireless communications environment based on LTE The uplink power level used is controlled.System 200 include base station 202 in sector, its can with substantially it is any The access terminal (not shown) of number is communicated.In addition, the sector in base station 202 can include receiving power monitor 204, Its pair power level related to the uplink signal obtained from access terminal is estimated.In addition, the sector in base station 202 Up-link (UL) power regulator 206 can be included, it is using the power level generation order after analysis, to change access Terminal power level.

It can be put down in order to which the communication between base station 202 and access terminal carries out lever to each physics (PHY) channel 208 Weighing apparatus；These physical channels 208 can include downlink physical channel and uplink physical channel.Downlink physical channel Example include physical downlink control channel (PDCCH), physical down link sharing channel (PDSCH) and public work( Rate control channel (CPCCH).PDCCH is 1/ layer of 2 (L1/L2) control channel of DL layers (for example, being DL or UL transmission distribution PHY Layer resource), it has the capacity of about 30-60 bits and protected by CRC (CRC).PDCCH can be carried Line link permits (grant) and downlink distribution.PDSCH is DL shared data channels；PDSCH can be different user it Between share DL data channels.CPCCH is sent on DL, for carrying out UL Power Controls to multiple access terminals.On CPCCH The correction of transmission can be single-bit or many bits.In addition, CPCCH can be PDCCH particular instance.Up-link thing Managing the example of channel includes physical uplink control channel (PUCCH), physical uplink link shared channels (PUSCH), detection Reference signal (SRS) and RACH (RACH).PUCCH includes CQI (CQI) channel, ack channel With UL requests.PUSCH is UL shared data channels.SRS can be without information, and can enable to enter channel on UL Row detection, to allow to be sampled on the part of whole system bandwidths to channel.It will be realized that claimed subject matter It is not restricted to these exemplary physical channels 208.

The up-link transmission that receiving power monitor 204 and UL power regulators 206 can be carried out for access terminal is carried For close-loop power control.Operation in LTE system can need in preset time, can be significantly less than the entirety of system 200 Transmission in the bandwidth of bandwidth.Each access terminal can preset time, the overall bandwidth of system 200 sub-fraction it is enterprising Row is sent.In addition, access terminal can be with frequency of use frequency hopping；So, when the respective sectors in base station 202 are attempted to that will dock When entering the adjustment that the uplink power level of terminal carried out and being estimated, difficulty is likely encountered.Therefore, supervised by receiving power The appropriate close-loop power control mechanism that visual organ 204 and UL power regulators 206 are provided from possible multiple moments with And wideband received power estimation is constructed in the transmission on possible multiple UL PHY channels, it can not consider access terminal Transmission bandwidth and the appropriate correction to path loss and shadowing effect is provided at any time.

Receiving power monitor 204 constructs broadband reception based on access terminal transmission from channel sample in a variety of ways Power is estimated.For example, receiving power monitor 204 can use PUSCH to be used to sample.According to the example, on a given slot PUSCH transmission bandwidth is positioned.Pseudo-random hopping pattern can be applied at boundary of time slot by frequency diversity scheduling Transmission bandwidth, and may be applied to retransmit, to make full use of frequency diversity.Utilize the PUSCH of frequency selective scheduling Transmission not by frequency hopping mode applications to sending in data, and therefore, in order to in all (or most of) frequencies Channel is sampled, it may be necessary to the long period.In addition, frequency selective scheduling can be carried out to SRS or PUCCH transmission Balance.Frequency selective scheduling is the scheduling strategy that make use of channel selectivity；For example, frequency selective scheduling is attempted to transmit It is limited in optimal sub-band.The scheduling strategy is relevant with Hypomobility access terminal.In addition, these transmission do not include frequency generally Frequency hopping.Frequency diversity scheduling is entirely different scheduling strategy, and it is using whole system bandwidth (for example, with minimum transmitting Bandwidth capacity is mould ...) to obtain frequency diversity naturally.The transmission related to frequency diversity scheduling can be with frequency frequency hopping It is related.In addition, frequency frequency hopping can include the transmission frequency for changing waveform in a pseudo-random fashion, so as to from channel and interference Viewpoint utilizes frequency diversity.

According to another example, receiving power monitor 204 can be sampled using PUCCH to UL channels, and because This, constructs wideband received power estimation.PUCCH transmission bandwidth can also be positioned on a given slot, each Frequency hopping is carried out on the boundary of time slot of Transmission Time Interval (TTI).Whether shared bandwidth can depend on depositing on specific T TI In PUSCH transmission., can be together with the remainder of data transfer on PUSCH when sending PUSCH on given TTI The control information that will be sent on PUCCH is sent in band (for example, the single carrier property in order to keep UL waveforms).When specific Can be that PUCCH transmits transmission in the local frequency reserved in the edge of system bandwidth when not sending PUSCH on TTI PUCCH。

According to another explanation example, receiving power monitor 204 channel can be sampled using SRS transmission and Build wideband received power estimation.It is (or minimum that SRS transmission band (on the time) can be substantially equal to whole system frequency band Access terminal transmission bandwidth capacity).(for example, SC-FDMA symbols are transmitted on LTE UL at given SC-FDMA symbols Minimum unit), transmission localization (for example, across the continuous subcarrier set of frequency hopping in time) or distribution can be made (for example, across whole system bandwidth or a part for whole system bandwidth, its can with frequency hopping or can not frequency hopping ...).

Receiving power monitor 204 constructs wideband received power from the sampling in whole system bandwidth upper signal channel and estimated Meter.However, depending on the mode for sampling to channel and/or whether frequency frequency hopping is applied to transmit, receiving power The time interval that monitor 204 builds wideband received power estimation from UL channel samples can be different.

PUCCH transmission when in the absence of UL data occurs in the edge of band system band.When can there will be UL data PUCCH transmission be positioned at in the data transfer identical frequency band on PUSCH.In addition, in order to be adjusted using UL frequency selectivities Degree, PUSCH transmission can not change transmission frequency or not frequency hopping, however, in order to enable frequency selective scheduling, for FDD/TDD systems, can be balanced to SRS.In addition, when PUSCH frequency of use diversity is dispatched, frequency frequency hopping is applied to Transmission.

In addition, based on the channel sample completed by receiving power monitor 204, UL power regulators 206 can be generated can To change the order of UL power levels used in specific access terminal.The order can be single bit correction (for example, up/down, ± 1dB ...) and/or many bit corrections (for example, ± 1dB, ± 2dB, ± 3dB, ± 4dB ...).In addition, UL power The order generated can be sent to expected from the order and connect by adjuster 206 (and/or sector in corresponding base station 202) Enter terminal.

In addition, each access terminal can be related to specific state on preset time.The example of access terminal state Including LTE_IDLE, LTE_ACTIVE and LTE_ACTIVE_CPC.It will be appreciated, however, that claimed subject matter is not limited In these illustrative states.

LTE_IDLE is the access terminal state that access terminal does not have unique cell ID.When in LTE_IDLE states When, access terminal can be without the connection to base station 202.Furthermore, it is possible to be completed via using RACH from LTE_IDLE states turn Move on to LTE_ACTIVE states.

LTE_ACTIVE is the access terminal state that access terminal has unique cell ID.In addition, when in LTE_ACTIVE When in state, access terminal can transmit data via up-link and/or downlink activity.Access in a state Terminal has UL private resources (for example, CQI, SRS ... for periodically sending).According to an example, LTE_ACTIVE states In access terminal discontinuous transmission/discontinuous can be used to receive (DTX/DRX) process, it has expected unlike about 20ms Or the 40ms much longer cycles.As movable (for example, in the band together with DL data or possible by PDCCH to DL Obtained UL licenses) directly in response to or by send UL requests on PUCCH, access terminal in a state starts PUSCH transmission.In addition, user in a state can be the access terminal occurred with UL/DL data active swap, or It is the access terminal of high service class (GoS) application (for example, voice (VoIP) ... in Internet Protocol) of operation.

LTE_ACTIVE_CPC (continuous packet connection) is LTE_ACTIVE state, wherein, access terminal retains it Unique cell ID, but released UL private resources.Make it possible to extend the battery longevity using LTE_ACTIVE_CPC Life.As to DL activities (for example, the UL licenses being likely to be obtained in the band together with DL data or by PDCCH ...) Response is asked by sending UL on RACH, and the access terminal in the sub- state starts transmission.Initial Trans can Using based on open loop mechanism (for example, be used as to DL activity response) or can based on upper one successfully it is leading (for example, RACH)。

With reference to Fig. 3, illustrated is to carry out periodicity correction to uplink power level used in access terminal System 300.System 300 includes base station 202, its (and/or any number of entirely different access with access terminal 302 Terminal (not shown)) communicated.Access terminal 302 includes UL power managers 304, and UL power managers 304 are further wrapped Include UL Power initializations device 306.In addition, access terminal 302 includes UL periodic transmissions machine 308.Base station 202 also includes receiving work( Rate monitor 204 and UL power regulators 206；Receiving power monitor 204 also includes periodicity adjuster 310.

Periodicity adjuster 310 generates the periodic power control command that will be sent to access terminal 302 (for example, week Phase property transmitting power control (TPC) order, periodically correction ...).In addition, periodicity adjuster 310 can be with any cycle (for example, 0.5ms, 1ms, 2ms, 4ms ...) by periodic power control command be sent to access terminal 302 (and/or appoint What entirely different access terminal)；However, it is anticipated that UL power regulators 206 and/or base station 202 can send this week Phase property power control command.In addition, periodicity adjuster 310 can produce single bit correction (for example, up/down, ± 1dB ...) And/or many bit corrections (for example, ± 1dB, ± 2dB, ± 3dB, ± 4dB ...).If for example, with upper frequency from week Phase property adjuster 310, which is sent, periodically to be corrected, then more likely using single bit correction, and vice versa.

The uplink power level that UL power managers 304 are used for up-link transmission to access terminal 302 is controlled System.UL power managers 304 can receive periodic power control command from base station 202, and be changed based on the order obtained It is changed into transmitting the uplink power level used.According to another explanation example, UL Power initializations device 306 can be set initially Up-link transmission power.For example, UL Power initializations device 306 can use open loop mechanism, so as to based on downlink activity Determine initial uplink transmission power.Additionally or alternatively, UL Power initializations device 306 can be by initial uplink The power level that power level is distributed to previously success leading (for example, RACH) is related (for example, previous ...).

Cyclical transmission can be sent to base station 202 by UL periodic transmissions machine 308 on uplink.Connect for example, working as When entering terminal 302 in LTE_ACTIVE states, UL periodic transmissions machine 308 can be run.In addition, UL periodic transmission machines The cyclical transmission of 308 transmission can be SRS transmission set；It will be appreciated, however, that claimed subject matter is not restricted to This, can use any kind of periodic uplink transmissions (for example, periodic CQI transmissions, periodicity PUCCH are passed It is defeated ...).So, because SRS transmission can be detectable signal, so UL periodic transmissions machine 308 can be on uplink SRS transmission is sent, to be detected in whole system bandwidth to channel；Therefore, with carrying out uplink frequency selection Property scheduling the identical time on, can use detectable signal for UL Power Controls calculate it is closed-loop corrected.Adopted with reference to channel Sample, the receiving power monitor 204 of base station 202 can be received and/or using the transmission sent by UL periodic transmissions machine 308. In addition, UL power regulators 206 and/or periodicity adjuster 310 can generate the order corresponding to the sampling.

, can be by the week of the UL transmission sent by the UL periodic transmissions machine 308 of access terminal 302 according to an explanation example Phase property as the DLTPC order transmission cycles used in access terminal 302 of periodicity adjuster 310 with being connected；Therefore, may be used To send DL TPC commands by the access terminal that periodicity is transmitted with different UL of entirely different transmission cycle.In addition, UL The periodicity of transmission can be related to the bit number distributed by the adjustment of access terminal power, and wherein the access terminal power is adjusted Whole is produced by periodicity adjuster 310 is specific access terminal (for example, access terminal 302 ...).For example, can be advance It is determined that correcting the bit number of distribution and uplink periods transmission rate for up-link power control (for example, SRS is passed Defeated speed, PUCCH transmission rates ...) between mapping.According to the example, 200Hz uplink periods transmission rate It may map to 1 bit, 100Hz speed may map to 1 bit, 50Hz speed may map to 2 bits, 25Hz speed Rate may map to 2 bits and 0Hz speed may map to x>2 bits.According to previous example, in access terminal punishment The bit number of dispensing power adjustment becomes much larger with the reduction of uplink periods transmission rate.In 0Hz uplinks At the limit of road periodic transmission rate (transmission for example, without SRS, PUCCH ...), power adjustment can be x>2 bits, It can be the open-loop transmission as needed with closed loop adjustment.

Periodicity adjuster 310 can on a periodic basis will correction be sent to it is related to base station 202, in LTE_ Substantial all users in ACTIVE state.According to an example, for example, can based on GoS demands, the DRX/DTX cycles and Offset etc., is grouped to the user that periodicity adjuster 310 is sent to order.Periodicity adjuster 310 can be It is user's group transmission power control command in PDCCH particular instance (CPCCH or TPC-PDCCH can be expressed as).According to In-band signaling can be used for a user's group by another explanation example, periodicity adjuster 310, wherein, the big I of user's group With more than or equal to 1.Can be based on the bit number required for correction and by information with the positively related expense in periodicity school It is sent to the relevant control (if present) needed for related access terminal.

In order to which periodicity adjuster 310 transmits transmitting power control (TPC) order on PDCCH, 32 bits can be used Pay(useful) load and 8 bit CRC.For example, 32 single-bit TPC lives in 1ms time intervals can be used for 1 PDCCH moment Order.So, it is assumed that used FDD, single PDCCH can be used to support that 320 are in LTE_ with 100Hz on each TTI User in ACTIVE state.It therefore, it can every 10ms and single bit correction be provided, this can allow 100dB/s correction.According to Another example, can use 16 dibit TPC commands in 1ms time intervals.So, it is assumed that used FDD, Ke Yi Using single PDCCH with the user in 50Hz 320 LTE_ACTIVE states of support on each TTI.Therefore, double ratios per 20ms Spy's correction allows 100dB/s correction.

Turning now to Fig. 4, illustrated is that power control command is aperiodically sent to the wireless communication loop based on LTE The system 400 of access terminal in border.System 400 includes base station 202, its (and/or any number with access terminal 302 Different access terminal (not shown)) communicated.Base station 202 includes receiving power monitor 204 and UL power regulators 206, UL power regulators 206 further comprise irregular adjuster 402.In addition, access terminal 302 includes UL power managers 304, UL power managers 304 further comprise irregular order receiver 404.

Irregular adjuster 402 can produce the power control command for pointing to access terminal 302 as needed.For example, working as By measurement (for example, to utilizing the data (such as setting the receiving power outside border) from receiving power monitor 204 The measurement of the condition recognized) triggering when, irregular adjuster 402 can be aperiodically transmitted.Irregular adjuster 402 can determine that the uplink power level of access terminal 302 deviates target on special time；So, as response, no Regular calibration device 402 can send a command to be adjusted the power level.In addition, irregularly adjuster 402 can be produced Raw single bit correction (for example, up/down, ± 1dB ...) and/or many bit corrections (for example, ± 1dB, ± 2dB, ± 3dB, ±4dB……)。

Irregular order receiver 404 can be obtained by irregular adjuster 402 (and/or UL power regulators 206 And/or generally speaking respective sectors in base station 202) correction that sends.For example, irregularly order receiver 404 can be explained The specific correction sent by the respective sectors in base station 202 is intended to be used for access terminal 302.In addition, based on the school obtained Just, irregular order receiver 404 and/or UL power managers 304 can change up-link used in access terminal 302 Power level.

The irregular correction of the uplink power level for access terminal 302 produced by irregular adjuster 402 Can be based on triggering.So, compared with periodicity is corrected, due to the unicast characteristic irregularly corrected, so irregularly school Just may be related to bigger expense.In addition, the example irregularly corrected according to many bits of use, can correct these PDCCH is mapped to (for example, in such a case it is possible to the part that capability correction is distributed as DL or UL permits is sent out Send) or PDCCH/PDSCH to (for example, in such a case it is possible to independently send or together with other data transfers With interior transmit power correct) particular instance.

With reference to Fig. 5, illustrated is system 500, and it is used based on leading upper in the wireless communications environment based on LTE Uplink power is controlled.System 500 includes the sector in base station 202, and it is (and/or any number of with access terminal 302 Different access terminal (not shown)) communicated.As described above, the respective sectors in base station 202 can include receiving power Monitor 204 and UL power regulators 206, UL power regulators 206 may further include irregular adjuster 402；And Access terminal 302 can include UL power managers 304, and UL power managers 304 may further include irregularly order and connect Receipts machine 404., can be with although it is not shown, in addition to irregular adjuster 402 or as the replacement of irregular adjuster 402 It is expected that UL power regulators 206 can include Fig. 3 periodicity adjuster 310, and/or except irregular order receiver Outside 404 or as the replacement of irregular order receiver 404, access terminal 302 can include periodicity order receiver； As a result, it is contemplated that claimed subject matter is not restricted to use irregular adjuster 402 and irregular order receiver 404 Following explanation.In addition, UL power managers 304 can also include preamble generator 502, preamble generator 502 is in uplink Power control preamble is sent on uplink (for example, before PUSCH/PUCCH transmission ...) before circuit-switched data transmission To the respective sectors in base station 202.In addition, UL power regulators 206 can include leading estimator 504, leading estimator 504 The power control preamble received is analyzed to be corrected power setting used in access terminal 302, and On the uplink by power control command transmitting to access terminal 302.However, it is anticipated that can be by preamble generator 502 It is included in access terminal 302, but is separated with UL power managers 304；And/or leading estimator 504 can be wrapped Include in the respective sectors of base station 202, but separated with UL power regulators 206.

There may be burst transfer SNR notable variation (variance) for up-link power control.It is this in order to mitigate It is deteriorated, it is possible to use preamble transmission to provide power control command in the forward direction access terminal 302 of uplink data transmission, its In, uplink data transmission can follow the UL sent on PDCCH to immediately begin to or continue after permitting.When receiving When UL permits, UL power managers 304 can use open Loop Power control to be provided for sending the initial of up-link transmission Power level.By using preamble generator 502, when sending sensitive information on uplink by PUCCH or PUSCH When, the transient effect related to open Loop Power control can be mitigated.

Preamble generator 502 can on uplink transmit power control it is leading.The power control preamble can be single Secondary SRS transmission.Respective sectors in base station 202 (and/or network) explicitly or implicitly schedule power can be controlled Leading this transmission.The power control preamble sent by preamble generator 502 makes it possible to carry out quick detection to channel, its Middle up-link transmission is across partly or completely system bandwidth (for example, being taken to minimum access terminal transmitted bandwidth capacity Mould ...).According to an explanation example, it can be realized using power control preamble per two or four frequency hoppings of TTI.In addition, work( First PUCCH or PUSCH transmission after the leading UL licenses for receive after UL inactive state of rate control Close-loop power control can expeditiously be carried out.

According to an example, when the access terminal 302 in LTE_ACTIVE_CPC states obtains UL licenses (for example, Due to down link data active state), what will be sent on uplink determined by UL power managers 304 is initial The power of transmission can be based on open Loop Power control (for example, without using closed loop mechanism).Initial open loop sets and can made an uproar, And accordingly, it is possible to it is not optimal for transmission power.However, once can be to first from access terminal 302 The transmission power of individual up-link transmission is corrected, it is possible to significantly improve the reliability of up-link transmission.

In order to handle previous example, preamble generator 502 is by the power before the information transfer from access terminal 302 Control is leading to be sent in base station 202 corresponding sector (for example, can send information on PUSCH and/or PUCCH).Can be with It is leading with the power level delivering power control produced according to open Loop Power control mechanism.Leading estimator 504 can be obtained simultaneously And power control preamble is checked, so that the instruction according to power control preamble is carried out quickly to the power setting of access terminal 302 Correction.For example, leading estimator 504 can be generated and transmission power control command is (for example, transmitting power control (TPC) is ordered Make), to adjust power level used in the UL power managers 304 of access terminal 302.Power control command can be single Bit correction and/or many bit corrections.Afterwards, UL power managers 304 can be performed obtains from the respective sectors in base station 202 Power control command.In addition, afterwards, access terminal 302 can be with UL power managers 304 according to the Power Control received The open loop power level after the correction set is ordered to send up-link transmission (for example, PUSCH and/or PUCCH transmission).

Respective sectors (and/or scheduler (not shown) of base station 202) in base station 202 can be clearly or hidden The transmission of the power control preamble from preamble generator 502 is dispatched containing ground.According to an explanation example, clearly it is scheduling to leading Generator 502 provides clear and definite instruction, so that transmit power control is leading on uplink.According to explanation example, from base station The UL licenses (for example, first UL license) that 202 (for example, on PDCCH) are sent can provide the data related to dispatching, and use Controlled in transmit power on uplink leading.Therefore, UL licenses can make preamble generator 502 right in an efficient manner Channel is detected (for example, crossing over system bandwidth in given TTI using the power control preamble sent on uplink Two or four frequency hoppings).Respective sectors in base station 202 receive up-link transmission and leading estimator 504 enters After row analysis, capability correction is calculated and by the capability correction with being used for PUCCH/PUSCH transmission (for example, carrying out work(to it Rate is corrected) new UL licenses (for example, second UL license) be transmitted together on PDCCH.

By way of another example, the implicit scheduling of power control preamble can be used.Based in LTE_ACTIVE_ Access terminal 302 in CPC states, preamble generator 502, which can be identified inferentially, to be sent out before routine data transfer Send power control preamble (for example, on PUSCH/PUCCH).Therefore, the respective sectors in base station 202 need not send two UL License (for example, such as the situation for being used to clearly dispatch power control preamble).In addition, the UL licenses clearly sent can be answered For next mixed automatic repeat request (HARQ) cycle, and the modulation for power control preamble and encoding scheme And/or resource can be acquiescence, and be all known (example in corresponding sector in access terminal 302 and base station 202 (MCS) Such as, in the memory for being stored in the memory of access terminal 302 and/or the respective sectors in base station 202).So, when making During with implicit scheduling, preamble generator 502 can transmit power control preamble in predetermined resource, rather than utilization is clearly adjusted The resource (for example, as situation for clearly dispatching) of degree.

After being corrected using power control preamble to UL power settings, access terminal 302 can be reallocated Physical uplink link circuit resource (for example, being redistributed by base station), and therefore return to LTE_ACTIVE states.When in LTE_ As described herein when in ACTIVE, subsequent transmission can be based on produced correction, and wherein the correction is by irregular adjuster 402 produce and are sent to access terminal 302 and by irregular order receiver 404 (and/or UL power managers 304) Perform.

Referring now to Figure 6, illustrated is system 600, it is in order to which transmission power control command on the uplink is to more Individual access terminal is grouped.System 600 include with access terminal 1 602, access terminal 2 604 ... and access terminal Respective sectors in the base station 202 that N 606 is communicated, wherein, N can be any integer.Each access terminal 602-606 can To further comprise respective UL power managers (for example, access terminal 1 602 includes UL power managers 1 608, access eventually Hold 2 604 include UL power managers 2 610 ..., access terminal N 606 include UL power managers N 612).In addition, base The respective sectors stood in 202 can include receiving power monitor 204, UL power regulators 206 and access terminal (AT) point Group device 614, AT bursters 614 are by access terminal 602-606 sub-combinations in groups for transmit power on the uplink Control command.

AT bursters 614 can be grouped according to various factors to access terminal 602-606.For example, AT bursters 614 One or more access terminal 602-606 can be assigned to one group based on DRX cycle and phase.According to another explanation example, AT bursters 614 can be based on uplink periods transmission rate used in access terminal 602-606 (for example, SRS transmission Speed, PUCCH transmission rates ...) access terminal 602-606 is assigned to each group.By by each of access terminal 602-606 Individual subclass and into different groups, UL power regulators 206 can effectively pass through PDCCH (or CPCCH, TPC- PDCCH the transmission of power control command) is carried out on DL (for example, multiple being connect by what is be grouped together in public message Enter terminal transmission power control command).By way of example, AT bursters 614 can be formed for periodic uplink Each group of Power Control；However, claimed subject matter is not restricted to this.

According to an explanation example, access terminal 1 602 can use 200Hz transmission rate, access terminal for SRS transmission 2 604 can use 50Hz transmission rate for SRS transmission, and access terminal N 606 can use 100Hz for SRS transmission Transmission rate.AT bursters 614 can identify these each transmission rates (for example, using via receiving power monitor Signal that 204 grades are obtained is recognized).Then, AT bursters 614 can be by access terminal 1 602 and access terminal N 606 (together with any other access terminal using 100Hz or 200Hz transmission rates) is assigned to a group A.AT bursters 614 may be used also So that access terminal 2 604 (and using any different access terminal of 25Hz or 50Hz transmission rates) is assigned into a group B. It will be appreciated, however, that claimed subject matter is not restricted to preceding description example.In addition, AT bursters 614 can be by group ID points Each group of dispensing (for example, being used on PDCCH or CPCCH).Once access terminal 602-606 is distributed into each group, by The order that UL power regulators 206 are sent can use the descending chain corresponding to the specific group related to expected reception access terminal Road resource.For example, AT bursters 614 and UL power regulators 206 can with cooperating with each PDCCH transmission by TPC Order is sent to multiple access terminal 602-606.In addition, each UL power managers 608-612 can recognize appropriate PDCCH Transmission, is obtained with (for example, based on corresponding group ID ...) to be intercepted and is pointed to its TPC command.

Fig. 7 is turned to, illustrated is the example transmission structure for power control command to be sent to access terminal group. For example, the transmission structure can be used for PDCCH transmission.To two example transmission structures (for example, transmission structure 700 and biography Defeated structure 702) it is described；However, it is anticipated that claimed subject matter is not restricted to these examples.Transmission structure 700 and 702 can reduce expense by the way that the power control command for multiple users is grouped into each PDCCH transmission. As described, the power control command for user in group A is grouped into first PDCCH transmission by transmission structure 700, and And the power control command for user in group B is grouped into second PDCCH transmission.In addition, first and second PDCCH transmission all includes CRC (CRC).In addition, transmission structure 702 is by the Power Control for user in group A and B Command combination is in public PDCCH transmission.By way of explanation, for transmission structure 702, it can will be used for user in group A Power control command be included in first segmentation of public PDCCH transmission, and can be by the power for user in group B Control command is included in second segmentation of public PDCCH transmission.

With reference to Fig. 8, illustrated is the exemplary timing chart of the periodic uplink power control process for LTE 800.At 802, the power control process for the access terminal in LTE_ACTIVE states is illustrated.In the state In, periodic SRS transmission is sent to base station by access terminal, and base station with periodic TPC command to periodic SRS Answer is made in transmission.As shown in illustrated example, pass through the single TPC bit pair periodically sent on the uplink The transmit power of access terminal is corrected.It will be noted that, it can be replaced with periodic CQI transmissions, periodic PUCCH transmissions etc. Periodicity SRS transmission.Due to periodic CQI transmissions or periodic PUCCH transmissions may not across whole system bandwidth, so From the viewpoint of channel detection, these transmission are probably less efficient；However, for closed-loop corrected, can be based in base station The UL measurements at place are balanced to these transmission.

At 804, the periods of inactivity for access terminal is described.(for example, pre- after periods of inactivity Determine or use threshold period), access terminal is transferred to the sub- states of LTE_ACTIVE_CPC.In the sub- state, by PHY UL Resource is deallocated from access terminal；Therefore, when recovering UL transmission, it is impossible to use close-loop power control.

At 806, access terminal recovers up-link transmission.Passed using RACH to recover up-link using open loop estimation It is defeated.According to an example, if it is considered to beneficial, it is possible to estimated according to a upper transimission power with some forgetting factor divided ring It is modified.As the RACH sent to access terminal response, base station can send the band internal power tune for access terminal Whole (for example, x bit powers are adjusted, wherein, x can be substantial any integer).

At 808, the identity of access terminal can be verified by RACH processes.Furthermore, it is possible at 808 (example Such as, with SRS configuration together with) complete PHY UL resources redistribute.

At 810, access terminal is in LTE_ACTIVE states.Therefore, access terminal recovers SRS cyclical transmission. As described, the cycle of the periodicity SRS transmission at 810 is different from the cycle of the periodicity SRS transmission at 802；However, institute The theme of prescription is not restricted to this.As the response to periodicity SRS transmission, base station sends TPC command, in such case Under, TPC command accounts for 2 bits (for example, ± 1dB, ± 2dB).In addition, although it is not illustrated, still access terminal is transmitted and can continued Utilize the open loop correction determined according to the received power level at access terminal.It therefore, it can connect at according to access terminal Receive do not include outside the open loop correction that the change of power is determined it is closed-loop corrected and/or including closed-loop corrected.

Turning now to Fig. 9, illustrated is the exemplary sequential of the irregular up-link power control process for LTE Figure 90 0.Illustrated is the power control process for the access terminal in LTE_ACTIVE states.Timing diagram 900 can be with There is no periodic uplink transmissions.Furthermore, it is possible to which capability correction is sent to from base station based on the power received on PUSCH Access terminal.Base station is estimated PUSCH transmission, to determine whether to carry out power adjustment.If base station is special by estimating Determine PUSCH transmission and think to need power to adjust, then can by irregular power adjustment, wherein base station by message (for example, TPC command in UL licenses) it is sent to access terminal.When base station determines that this power adjustment is for given on special time When PUSCH transmission is not required, then base station need not on the time as to give PUSCH transmission response and send TPC Order (but, for example, as the response to giving PUSCH transmission, ACK ... can be sent).In addition, no matter access terminal exists Whether preset time obtains TPC command, and access terminal can rely on the correction based on open loop mechanism forever.In addition, by base station The correction of transmission can be single bit correction and/or many bit corrections.

It will be realized that similar scheme can be used in the case of with periodicity UL transmission, wherein it is possible to according to need Correction is sent on DL.So, access terminal can periodically send SRS transmission on uplink, and base station can be right The SRS transmission is evaluated to the power adjustment for determining to carry out.Afterwards, once it is determined that needing power to adjust in special time It is whole, base station just can on the uplink by TPC command be sent to access terminal (for example, power control command it is irregular under Uplink transmission).

Described up-link power control process includes multiple public aspects in figs. 8 and 9.I.e., it is possible to be the cycle Property and irregular up-link power control use for UL data transfers Δ PSD (delta power spectral density) concept.Δ PSD can be provided as minimizing the maximum transmission power for being allowed for neighbouring cellular influence given user.Δ PSD can With with the development and change in time such as from neighbouring cellular load designator, channel condition.In addition, when possible When, Δ PSD can be reported and give access terminal (for example, being reported together in band).In LTE system, network can select to permit Perhaps access terminal is transmitted using which MCS/Max data-pilot to powerratio.However, initial Δ PSD can be permitted based on UL Can in MCS (for example, the relation between UL licenses and initial Δ PSD can be based on formula).In addition, most of foregoing interior Appearance is related to the control of honeycomb internal power.For honeycomb internal power control other mechanism of (for example, load control) with it is described herein Mechanism can be complementary.

, periodically can be with combination operation with irregular up-link power control process according to another explanation example.According to Explanation example, also usage cycles can update on the basis of irregular update.If there is scheduled PUSCH transmission, These PUSCH transmissions may need the corresponding PDCCH transmission permitted with UL, and therefore, it can power in PDCCH Control command is sent together with permitting with UL.If for example, PDCCH for lasting UL transmission it is unavailable (for example, due to by compared with High level is configured to PHY resources, so not needing UL licenses), then transmit power it can be controlled on TPC-PDDCH1 Order.Meanwhile, if there is scheduled PDSCH on DL, then PUCCH Power Control is (for example, CQI and ACK/ NAK) it can become more important.In such a case it is possible to transmit power for PUCCH together with being distributed on PDCCH with DL Control command.For the DL transmission without relevant control or in the case of without DL data activities, it can use Cyclical transmission on TPC-DPCCH2 carries out Power Control to PUCCH.Therefore, available resources are being used (for example, being PUSCH The PDCCH distributed with DL, the periodicity TPC lives on TPC-PDCCH are used using the PDCCH permitted with UL, for PUCCH Order, the PUSCH that it can be dispatched to PUCCH and persistently is related ... ...) while, when needed can (for example, aperiodically) With transmission power control command.

Turning now to Figure 10, illustrated is the up-link power for LTE being balanced to power control preamble The exemplary timing chart 1000 of control process.Timing diagram 1000 by dispatched in explicit or implicit mode, from base Stand (or network) power control preamble transmission.At 1002, UL licenses can be sent to from base station (or network) Access terminal.UL licenses can be transmitted by way of PDCCH is transmitted.At 1004, access terminal is by Power Control (PC) it is leading to be sent to base station.Before can be with the power level transmit power control based on determined by open Loop Power control mechanism Lead.At 1006, the power setting that the respective sectors in base station can be according to the power control preamble of reception to access terminal is entered Row correction.Power control command (for example, TPC) can be sent to access terminal by the respective sectors in base station.Power Control is ordered Order can be single bit commands and/or many bits commands.When using clearly scheduling, respective sectors in base station can be with Power control command is sent together with second UL licenses for data sending of access terminal.According to another explanation example, When using implicit scheduling, it is not necessary to the transmission power control command together with UL licenses, but, access terminal can be used The UL sent at 1002 permits to send data on uplink.At 1008, access terminal can on uplink by Data are sent to base station.Access terminal can with after correction power setting (for example, it is being determined via open Loop Power control and The power level adjusted based on receiving power control command) send data.For example, can using data as PUSCH transmission and/ Or PUCCH transmission is transmitted.Afterwards, although do not describe, but LTE_ACTIVE states are maintained in access terminal afterwards While can realize conventional closed loop power control technology as described herein.

With reference to Figure 11-12, illustrate to be related in the wireless communications environment based on LTE via periodicity correction, irregularly Correction or periodically correction and the irregularly combination of correction correction, Power Control is used with reference to control up-link power Leading method.Although for simplicity purposes of illustration method is represented and is described as a series of actions, it will be understood that and , it is realized that method is not limited by running order, according to one or more embodiments, some actions can go out in a different order Occur now and/or parallel with other actions shown and described herein.For example, it should be appreciated by those skilled in the art that and , it is realized that method can be alternatively expressed as to a series of correlation behaviors or the event such as in state diagram.In addition, root According to one or more embodiments, it is not necessary to which the action being had been described carrys out implementation method.

With reference to Figure 11, it is illustrated contribute to generate in the wireless communications environment based on Long Term Evolution (LTE) be used for The method 1100 of the power control preamble of Power Control.At 1102, up-link can be received from the respective sectors in base station License.Up-link license can be transmitted via physical downlink control channel (PDCCH) transmission.For example, when access is whole When end is in LTE_ACTIVE_CPC states, up-link license can be received.According to another explanation example, 1102 The up-link license that place is received can be the first up-link license obtained after uplink inactivity. At 1104, power control preamble can be sent to the corresponding fan in base station using the power setting based on open Loop Power control Area.Power control preamble can be (for example, to minimum access terminal transmission bandwidth capacity in partly or completely system bandwidth Modulus) to channel carry out quick detection up-link transmit.For example, power control preamble can be single-time Sounding Reference signal (SRS) transmit.By way of another example, power control preamble can be irregular in uplink data channel CQI (CQI) report.Power control preamble can be used in given Transmission Time Interval (TTI) across system Regiment commander wide two or four frequency hoppings.In addition, power control preamble can be physically ink Shared Channel (PUSCH) And/or the up-link transmission before the uplink data transmission in physical uplink control channel (PUCCH).This Outside, because close-loop power control is probably unavailable for access terminal before access terminal is in LTE_ACTIVE states , control leading power setting to be based on open Loop Power control for transmit power.Furthermore, it is possible to clearly or Impliedly schedule power controls leading transmission.The example clearly dispatched according to using is (for example, transmission can be explicitly indicated Characteristic), the up-link license received at 1102 can distribute resource for the transmission of power control preamble, and specifying to make Modulation and/or coding etc..According to another explanation example using implicit scheduling (for example, can impliedly indicate that transmission is special Property), predetermined resource, modulation, coding etc. can be balanced for the transmission of power control preamble；So, access terminal can With using these predetermined resource, modulation, codings etc. on uplink transmit power control it is leading, without by these information It is explicitly included in the up-link license received at 1102.

, can be from the respective sectors receiving power control command in base station at 1106.Power control command can be docked Enter terminal to be adjusted for the power setting that up-link is transmitted.For example, power control command can be single bit correction with And/or many bit corrections of person.So, access terminal can modify according to the power control command of reception to power setting. In addition, after being corrected using power control preamble to power setting, physical uplink link circuit resource can be redistributed To access terminal, and access terminal can be transferred to LTE_ACTIVE states.If in addition, using clearly scheduling, can be with Second up-link license is received together with power control command, and can be used under second up-link license transmission One uplink data transmission.Alternatively, if using implicit scheduling, power control command need not be up by second Link license is together；But, the up-link license received at 1102 can be used to send next uplink data and passed It is defeated (for example, can by up-link approved applications in this case to next mixed automatic repeat request (HARQ) week Phase).

At 1108, base station can be transmitted data to the power setting after adjustment.Can be by being used as Power Control The correction that a part for order is provided is modified to the open loop estimation for power setting, and can be with the work(after the adjustment Rate sets and realizes data transfer.If using clearly dispatching, data transfer can be in response to obtaining together with power control command The license of second up-link, or if using impliedly dispatching, data transfer can be in response to being received at 1102 Up-link license.Data transfer can be physical uplink link shared channels (PUSCH) transmission and/or physical uplink Link control channel (PUCCH) is transmitted.According to another example, data transfer can be related to one group of cyclical transmission (for example, SRS transmission, CQI transmission, PUCCH transmission etc.).

Furthermore, it is possible to be received after following the data transfer at 1108 to power control command.When triggering , can transmission power control command on the uplink during condition.Power control command can be single bit commands and/or many ratios Spy's order.Furthermore, it is possible to via physical downlink control channel (PDCCH) or PDCCH/PDSCH, (physical down link is common Enjoy channel) to obtaining power control command.Furthermore, it is possible to received power control command as independent transmission, or can be with Power control command interior is received in the band together with other data that respective sectors are sent from base station.It is then possible to Change the power setting used for the data transfer at 1108 based on power control command.In addition, there is no power On the time of control command, it is not necessary to carry out this change to power setting.According to another example, regardless of whether receiving simultaneously And power setting is adjusted using power control command, open Loop Power control mechanism can be used to change power setting. By way of another explanation, it is possible to use pass through any kind of (such as periodically and/or irregular) Power Control The power setting that order changes sends data on uplink.

Turning now to Figure 12, it is illustrated contribute in the wireless communications environment based on Long Term Evolution (LTE) to The method 1200 estimated in the power control preamble of Power Control.At 1202, up-link license can be sent to Access terminal.When access terminal is in LTE_ACTIVE_CPC states, up-link license can be sent.Furthermore, it is possible to Up-link license is sent on PDCCH.According to an example, up-link license can be dispatched clearly from access terminal The transmission (for example, transmission characteristic can be explicitly indicated) of power control preamble；So, according to the example, access terminal can divide With the resource that will be transmitted for power control preamble, modulation, coding etc..By way of another example, access terminal can be with (dispatched for the transmission of power control preamble using predetermined resource, modulation, coding etc. for example, implying, transmission characteristic can be hidden Containing ground indicate ...), and can by 1202 send up-link apply permissions to sent by access terminal with The uplink data transmission of next mixed automatic repeat request (HARQ) cycle correlation.

At 1204, power control preamble can be received.Power that can be to be set based on open Loop Power control Level controls leading from access terminal transmit power.Furthermore, it is possible to verify access terminal from the power control preamble of reception and be Power level used in delivering power control is leading.Power control preamble can be in some or all of system bandwidth The up-link that (for example, to minimum access terminal transmission bandwidth capacity modulus) carries out quick detection to channel is transmitted.For example, work( Rate control is leading can to use two or four frequency hoppings in given Transmission Time Interval (TTI) across system bandwidth.Example Such as, power control preamble can be single-time Sounding Reference signal (SRS) transmission.By way of another example, Power Control Leading can be irregular CQI (CQI) report in uplink data channel.

At 1206, power control command can be generated based on the analysis to power control preamble, wherein, Power Control life Order can be corrected to the power level of access terminal.By way of explanation, power control command can be whole to access The single bit correction and/or many bit corrections of power level used in end., can be by power control command transmitting at 1208 To access terminal.When using clearly dispatching, second up-link license can be sent out together with power control command Send, and access terminal can use second up-link license to send next uplink data transmission.Alternatively, When using implicit scheduling, power control command need not permit with second up-link, but, access terminal can make The up-link sent at 1202 permits to send next uplink data transmission.In addition, using Power Control It is leading power level is corrected after, physical uplink link circuit resource can be reassigned to access terminal, and access Terminal can be transferred to LTE_ACTIVE states.At 1210, it can receive and be sent out with the power level after correction from access terminal The uplink data transmission sent.Data transfer can be physical uplink link shared channels (PUSCH) transmission and/or thing Manage uplink control channel (PUCCH) transmission.According to another example, the data transfer can be related to one group of cyclical transmission (for example, SRS transmission, CQI transmission, PUCCH are transmitted ...).

When receiving uplink data transmission at 1210, it can be determined that whether adjust access terminal up when sending Used power level during link data transfer.According to an example, power level can be compared with target, and If difference exceedes threshold value, then can just trigger adjustment；Otherwise, if difference is less than threshold value, then now avoid the need for adjusting It is whole.Furthermore, it is possible to determine the adjustment amount to the power level of access terminal.When it is determined that being adjusted to power level, It can work as irregular power when being triggered by measurement (for example, in the measurement ... for setting the received power level outside boundary) Control command is sent to access terminal, to change power level.So, irregular Power Control life can be sent as needed Order.Irregular power control command can be single bit correction (for example, up/down, ± 1dB ...) and/or many bit schools Just (for example, ± 1dB, ± 2dB, ± 3dB, ± 4dB ...).Furthermore, it is possible to which irregular power control command is mapped into physics Downlink control channel (PDCCH) or PDCCH/PDSCH (physical down link sharing channel) to particular instance.This Outside, can independently it send or in the interior irregular power control command of transmission of the band together with other data transfers.In addition, example Such as, irregular power control command can be sent via unicast transmission.

According to one or more aspects described herein, it will be appreciated that on using with irregular Power Control Power control preamble can make inference.As it is used herein, general, term " deduction " or " inference " refer to from a series of Inference or deduction are carried out to system, environment, and/or the state of user in the observation captured via event and/or data Process.It is, for example, possible to use inference is to specific context, either behavior is identified or can generated shape probability of state point Cloth.Inference can be probable property, that is to say, that the calculating based on consideration data and event to states of interest probability distribution. Inference can also refer to the technology for constituting higher level event from sequence of events and/or data.No matter event whether It is related in the time, and no matter event and data come from one or several events and data source, this inference Result in and new event or behavior are built from a series of observed events and/or the event data stored.

According to an example, one or more methods as given above can include making on identifying whether using upper The inference clearly dispatched and/or imply scheduling of uplink power control preamble transmission., can be with by way of another explanation The inference of the resource of uplink transmission on power control preamble will be used on identification by making.It will be realized that previous example It is inherently illustrative, and not want limitation and combine each embodiment described herein and/or method to make The number of the inference gone out, and not want the mode that these inferences are made in limitation.

Figure 13 is the explanation of access terminal 1300, and access terminal 1300 contributes in the wireless communication system based on LTE Use the power control preamble for Power Control.Access terminal 1300 includes receiver 1302, for example, receiver 1302 is from connecing Receive antenna (not shown) and receive signal, and typical operation is performed to received signal (for example, filtering, amplification, down conversion Deng), and the signal after regulation is digitized to be sampled.For example, receiver 1302 can be MMSE receivers, and And demodulator 1304 can be included, demodulator 1304 can be demodulated to the symbol received and be supplied to processing Device 1306 is used for channel estimation.Processor 1306 can be exclusively used in analyzing simultaneously the information that receiver 1302 is received And/or person generates the processor of the information for being transmitted by emitter 1316, can be to one of access terminal 1300 or The processor that multiple components are controlled, and/or can be that the information that receiver 1302 is received is analyzed, generated The processing being controlled for the information transmitted by emitter 1316 and to the one or more assemblies of access terminal 1300 Device.

In addition, access terminal 1300 can also include memory 1308, memory 1308 is operably connected to processor 1306, and memory 1308 can store the data that will be sent, received data, the mark for distributing to access terminal 1300 Know symbol, the information related to the power control command obtained and for choosing whether to perform any of power control command Other suitable information.In addition, memory 1308 can also store agreement and/or algorithm, these agreements and/or algorithm and generation The power control preamble that sends on uplink and/or the power level for transmission is estimated based on open loop mechanism Meter is related.

It will be realized that data storage (for example, memory 1308) described herein can be volatile memory or Nonvolatile memory, or volatibility and nonvolatile memory can be included.It is non-by way of illustrating and noting limit Volatile memory can include read-only storage (ROM), programming ROM (PROM), electrically programmable ROM (EPROM), electrically erasable Except PROM (EEPROM) or flash memory.Volatile memory can include random access storage device (RAM), and it can be as outer Portion's buffer memory.By way of illustrating and noting limit, RAM is in such as synchronous random access memory (SRAM), dynamic ram (DRAM), same Walk DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhancing SDRAM (ESDRAM), synchronization link DRAM (SLDRAM) and directly it can be used in Rambus RAM (DRRAM) many forms.Thematic system and the memory of method 1308 It is intended to include the memory of these and any other suitable type, rather than wants limited to this.

Receiver 1302 can also be operably connected to UL power managers 1310, the 1310 pairs of accesses of UL power managers The power level that terminal 1300 is used to be transmitted via up-link is controlled.UL power managers 1310 can set use In the uplink power level that data, control signal etc. are sent via any kind of uplink channel.UL power managements Device 1310 can use open loop mechanism to select uplink power level.Connect in addition, UL power managers 1310 can be used The power control command that receipts machine 1302 is obtained is adjusted to uplink power level.Furthermore it is possible to by UL power managements Device 1310 and/or receiver 1302 are connected to preamble generator 1312, and preamble generator 1312 is produced for certain power electricity The power control preamble that flat (being determined for example, being based on open loop mechanism by UL power managers 1310) sends on uplink.Can To send as the power control preamble produced by preamble generator 1312, to use the uplink across wireless communications environment bandwidth Road transmission carrys out quick detection uplink channel.In addition, as the response to power control preamble, can be from base station receiving power Control command, and UL power managers 1310 can use power control command, so as to the work(for power control preamble The open loop estimation of rate level is adjusted.Access terminal 1300 also includes modulator 1314 and emitter 1316, for example, emitter 1316 send signal to base station, another access terminal etc.., will consciousness although being described as separating with processor 1306 Arrive, UL power managers 1310, preamble generator 1312 and/or modulator 1314 can be processors 1306 or many The part of individual processor (not shown).

Figure 14 is the explanation of system 1400, and system 1400 contributes in the wireless communications environment based on LTE to for work( The power control preamble of rate control is analyzed.System 1400 includes the fan in base station 1402 (for example, access point, eNB ...) Area, base station 1402 has receiver 1410 and emitter 1422, and receiver 1410 comes from one by multiple 1406 pairs of reception antennas The signal of individual or multiple access terminals 1404 is received, and emitter 1422 by transmitting antenna 1408 to one or more Access terminal 1404 is transmitted.Receiver 1410 can from the receive information of reception antenna 1406, and with the letter to being received Cease the demodulator 1412 being demodulated operationally related.Symbol after 1414 pairs of demodulation of processor is analyzed, processor 1414 can be similar to above for the processor described by Figure 13, and be connected to memory 1416, memory 1416 Pair accord with (for example, MACID ...) relevant information with access terminal identification, will be sent to or from access terminal 1404 (or The different base station (not shown) of person) data (for example, power control command, up-link permit ...) that receive and/or Any other suitable information related with function to performing various operations given in this article is stored.Also by processor 1414 are connected to receiving power monitor 1418, and power monitor 1418 is accessed based on the signal obtained at base station 1402 Uplink power level used in terminal 1404.For example, receiving power monitor 1418 can be to from PUSCH transmission Uplink power level is analyzed.According to another explanation example, receiving power monitor 1418 can be to from periodically The uplink power level of up-link transmission is estimated.

Receiving power monitor 1218 can be operably connected to leading estimator 1420, leading 1420 pairs of estimator The power control preamble that base station 1402 is obtained from access terminal 1404 is analyzed.Leading estimator 1420 is also to sending the power Power level used in the leading access terminal of control is corrected.So, leading estimator 1420 generates what will be sent For the power control command being adjusted to access terminal power level.Furthermore it is possible to which leading estimator 1420 is operable It is connected to modulator 1422.Modulator 1422 can be multiplexed to power control command, to pass through antenna by emitter 1426 1408 are transferred to access terminal 1404.Although being described as separating with processor 1414, it will be appreciated that receiving power monitor 1418th, leading estimator 1420 and/or modulator 1422 can be processor 1414 or multiple processor (not shown) Part.

Figure 15 shows example wireless communications 1500.For simplicity, wireless communication system 1500 describes one Sector in base station 1510 and an access terminal 1550.It will be appreciated, however, that system 1500 can include more than one base station And/or more than one access terminal, wherein, extra base station and/or access terminal can be with examples disclosed below Property base station 1510 and access terminal 1550 is substantially the same or difference.In addition, it will be appreciated that base station 1510 and/or access are eventually End 1550 can use system as described herein (Fig. 1-6,13-14 and 16-17) and/or method (Figure 11-12), so as to Help radio communication therebetween.

At base station 1510, transmission (TX) data will be supplied to from data source 1512 for the business datum of multiple data flows Processor 1514.According to an example, each data flow can be sent on each antenna.TX data processors 1514 are based upon The specific coding scheme of data flow selection is formatted, encodes and interweaved to the business data flow, to provide after coding Data.

OFDM (OFDM) technology can be used by for the data and pilot number after the coding of each data flow According to being multiplexed.Additionally or alternatively, can to frequency pilot sign carry out frequency division multiplexing (FDM), time division multiplexing (TDM) or Person's code division multiplexing (CDM).Typically, pilot data is the known data patterns handled in a known way, and can be in access It is used for estimating channel response at terminal 1550.Can be based upon the selection of each data flow certain modulation schemes (for example, Binary phase shift keying (BPSK), QPSK (QPSK), M- phase-shift keying (PSK)s (M-PSK), M- quadrature amplitude modulations (M-QAM) Deng) it is modulated (for example, symbol mapping) to the pilot tone after multiplexing and for the data after the coding of the data flow, to provide Modulation symbol.Data speed for each data flow can be determined by processor 1530 is performed or is provided instruction Rate, coding and modulation.

Modulation symbol for data flow can be supplied to TX MIMO processors 1520, it can enter to modulation symbol Row is further handled (for example, for OFDM).Then, NT stream of modulation symbols is supplied to NT by TX MIMO processors 1520 Emitter (TMTR) 1522a to 1522t.In various embodiments, beam forming weighting is applied to by TX MIMO processors 1520 The symbol of data flow, and applied to the antenna that symbol is sent from it.

Each emitter 1522 is received and handled to each symbol stream, to provide one or more analog signals, And further regulation (for example, amplification, filtering and up conversion) is carried out to analog signal, is suitable for provide in mimo channel The modulated signal of upper transmission.In addition, spontaneous emission in future machine 1522a to 1522t NT modulated signal is respectively from NT antenna 1524a to 1524t is sent.

At access terminal 1550, transmitted modulated signal is received by NR antenna 1552a to 1552r, And the signal received from each antenna 1552 is supplied to each receiver (RCVR) 1554a to 1554r.Each receiver (for example, filtering, amplification and down conversion) is adjusted in 1554 pairs of respective signals, and the signal after regulation is digitized to carry For sampling, and further sampling is processed for provide corresponding " reception " symbol stream.

RX data processors 1560 can be based on specific receiver treatment technology to the NR from NR receiver 1554 Individual reception symbol stream is received and handled, to provide the symbol stream of NT " detecting ".RX data processors 1560 can be with Each detected symbol stream is demodulated, deinterleaving and decoding, to recover the business datum for the data flow.RX The processing of data processor 1560 with performed by TX MIMO processors 1520 and TX data processors 1514 at base station 1510 Processing is complementary.

Processor 1570 can be determined periodically using which kind of available technology as discussed above.In addition, processor 1570 can generate the reverse link message including matrix index portion and rank value part.

Reverse link message can include on communication link and/or receive various types of information of data flow.Can be with Reverse link message is handled by TX data processors 1538, reverse link message adjusted by modulator 1580 System, reverse link message is adjusted by emitter 1554a to 1554r, and reverse link message is sent back into base station 1510；Wherein, TX data processors 1538 can also receive the business datum for multiple data flows from data source 1536.

At base station 1510, received by 1524 pairs of modulated signals from access terminal 1550 of antenna, by connecing Receipts machine 1522 is adjusted, and it is demodulated by demodulator 1540, and by RX data processors 1542 to it Handled, to extract the reverse link message sent by access terminal 1550.In addition, processor 1530 can be to being extracted Message handled, to determine which pre-coding matrix to determine beam-forming weights using.

Processor 1530 and 1570 can indicate respectively (for example, control, coordination, management etc.) in base station 1510 and access eventually Hold the operation at 1550.Each processor 1530 and 1570 can be with store program codes and data memory 1532 and 1572 It is related.Processor 1530 and 1570 can also carry out calculating, to obtain being respectively used to up-link and the frequency of downlink With impulse response estimation.

It will be appreciated that, it can be realized in hardware, software, firmware, middleware, microcode or its any combinations herein Described embodiment.Realized for hardware, can be in one or more application specific integrated circuits (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), PLD (PLD), field programmable gate array (FPGA), processing Device, controller, microcontroller, microprocessor, other electronic units or its group for being designed as performing functionality described herein Processing unit is realized in closing.

When realizing these embodiments in software, firmware, middleware or microcode, program code or code segment, In the machine readable media that such as storage assembly can be stored in.Code segment can represent process, function, subprogram, Any combinations of program, routine, subroutine, module, software kit, class or instruction, data structure or program statement.It can lead to Cross transmission and/or receive information, data, variable, parameter or memory content by code segment be connected to another code segment or Person's hardware circuit.Any appropriate module including Memory Sharing, messaging, token passing, network transmission etc. can be used Information, variable, parameter, data etc. are transmitted, forwarded or sent.

Realized for software, can be to perform the module of functionality described herein (for example：Program, function etc.) realize Techniques described herein.Can be by software code storage in a memory cell, and perform by processor the software Code.Memory cell can be realized inside processor or outside processor, memory cell is realized outside processor In the case of, memory cell can be communicatively connected to processor via various means as known in the art.

With reference to Figure 16, illustrated is system 1600, and it makes it possible to be based on before Power Control in a wireless communication environment The power control command for access terminal is given birth in artificial delivery.For example, system 1600 can be at least partially disposed in the sector in base station. It will be realized that system 1600 is expressed as including function box, it can represent processor, software or its combination (example Such as, firmware) function box of function realized.System 1600 includes can be with the logical groups of the electronic building brick of cooperating 1602.For example, logical groups 1602 can include the electronic building brick 1604 for being used to send up-link license on the uplink.This Outside, logical groups 1602 can include being used to obtain being estimated before the Power Control that the power level determined is sent according to open loop power The electronic building brick 1606 led.In addition, logical groups 1602 can include being used to send the Power Control for being corrected power level The electronic building brick 1608 of order.Logical groups 1602 can also include being used to obtain the uplink carried out with the power level after correcting The electronic building brick 1610 of circuit-switched data transmission.In addition, system 1600 can include memory 1612, it is preserved for execution and electronics The instruction of the function related to 1610 of component 1604,1606,1608., will reason although being expressed as outside memory 1612 Solution, one or more electronic building bricks 1604,1606,1608 and 1610 may reside in memory 1612.

Figure 17 is turned to, illustrated is system 1700, it makes it possible to use before Power Control in a wireless communication environment Lead.For example, system 1700 can be located in access terminal.As described, system 1700 includes multiple function box, and it can be with Represent the function of being realized by processor, software or its combination (for example, firmware).System 1700 includes that behaviour can be cooperateed with The logical groups 1702 of the electronic building brick of work.Logical groups 1702 can include the electronic building brick for being used to obtain up-link license 1704.In addition, logical groups 1702 can include being used for estimating that the power level of selection transmits up according to open Loop Power control Link power controls leading electronic building brick 1706.In addition, logical groups 1702 can include being used to obtain changing power level The electronic building brick 1708 of power control command.Meanwhile, logical groups 1702 can include being used to send with the power level after change The electronic building brick 1710 of uplink data.In addition, system 1700 can include memory 1712, it is preserved for performing and electricity The instruction of the function related to 1710 of sub-component 1704,1706,1708., will although being expressed as outside memory 1712 Understand, electronic building brick 1704,1706,1708 and 1710 may reside in memory 1712.

It described above is the example of one or more embodiments.It is, of course, not possible in order to which previous embodiment is described Combination of the purpose to each possible component or method be described, but those skilled in the art is it is to be appreciated that right The many of each embodiment is further combined and displacement is possible.Therefore, described embodiment be intended to comprising it is all this The changes, modifications and variations fallen within the spirit and scope of the appended claims a bit.In addition, as in detailed description or right It is required that in use term "comprising", the term be intended to similar to when in the claims using be transition word when term Like that, representing open includes for the explanation of " comprising ".

Claims (32)

1. a kind of method for helping to create the power control preamble used in a wireless communication environment, including：

Up-link license is received from base station, and up-link license is on first after uplink inactivity Line link is permitted；

Before data are licensed and are transmitted in the up-link, with the power setting based on open Loop Power control by work( Rate control is leading to be sent to the base station；

From the base station receiving power control command, the power control command is adjusted to the power setting；And

The base station is sent said data to the power setting after the adjustment.

2. the method for claim 1, wherein the power control preamble is by given Transmission Time Interval (TTI) the up-link transmission detected in using frequency hopping in partly or completely system bandwidth to channel.

3. the method for claim 1, wherein the power control preamble is single-time Sounding Reference signal (SRS) transmission.

4. the method for claim 1, wherein the power control preamble is indefinite in uplink data channel CQI (CQI) report of phase.

5. the method for claim 1, wherein the transmission characteristic of the power control preamble is explicitly indicated.

6. method as claimed in claim 5, in addition to：

As the response permitted the up-link, the resource, modulation clearly specified in up-link license are used Or at least one in coding sends the power control preamble；

Second up-link license is received together with the power control command from the base station；And

The data are sent by using the second up-link license received together with the power control command To the base station.

7. the method for claim 1, wherein the transmission characteristic of the power control preamble is impliedly indicated.

8. method as claimed in claim 7, in addition to：

As the response permitted the up-link, at least one in predetermined resource, predetermined modulation or predictive encoding is used It is individual come send in the power control preamble, the predetermined resource, predetermined modulation or predictive encoding it is described at least one be It is access terminal and the base station sets before the up-link license is received；

The data are sent by using the up-link license received before the power control command is received To the base station.

9. the method as described in claim 1, in addition to it is used as the response receiving power control command to the data transfer.

10. a kind of radio communication device, it makes it possible to use power control preamble in a wireless communication environment, including：

Module for obtaining up-link license, the up-link license is first after uplink inactivity Individual up-link license；

For estimating selection according to open Loop Power control before data are licensed and are transmitted in the up-link The leading module of power level transmission up-link power control；

Module for obtaining the power control command being changed to the power level；And

Module for sending uplink data with the power level after the change.

11. radio communication device as claimed in claim 10, wherein, the up-link power control is leading be by Determine channel to be detected using frequency hopping in Transmission Time Interval (TTI) and crossed over the upper of partly or completely system bandwidth Uplink transmission.

12. radio communication device as claimed in claim 10, wherein, the leading up-link power control is single detection Reference signal (SRS) is transmitted.

13. radio communication device as claimed in claim 10, wherein, the leading up-link power control is in uplink Irregular CQI (CQI) report on circuit-switched data channel.

14. radio communication device as claimed in claim 10, in addition to：

For as the response permitted the up-link, when clearly scheduled, the up-link power control to be leading During transmission, by using the information clearly included in up-link license come before transmitting the up-link power control The module led；

Module for obtaining second up-link license simultaneously with the power control command；And

For as the response pair second up-link obtained with the power control command license simultaneously, sending institute State the module of uplink data.

15. radio communication device as claimed in claim 10, in addition to：

For as the response permitted the up-link, when impliedly scheduled, the up-link power control to be leading During transmission, passed using predetermined information known to the access terminal before the up-link license is obtained and the base station reasoning The module for sending the up-link power control leading；And

For described to send by using the up-link license received before the power control command is obtained The module of uplink data.

16. radio communication device as claimed in claim 10, in addition to for as to the uplink data transmission Response obtains the module of power control command.

17. a kind of method for helping in a wireless communication environment to estimate the power control preamble for Power Control, Including：

Up-link license is sent to access terminal；

Receive before data are licensed and are transmitted from the access terminal in the up-link with based on open loop power The power control preamble that the power level that control is set is sent from the access terminal；

Power control command is generated based on the analysis to the power control preamble, the power control command is whole to the access The power level at end is corrected；

Before the uplink data transmission is received from the access terminal, by the power control command transmitting described in Access terminal；And

Receive the uplink data transmission sent with the power level after the correction from the access terminal.

18. method as claimed in claim 17, wherein, the power control preamble is by given Transmission Time Interval (TTI) channel is detected using frequency hopping in and transmitted across the up-link of partly or completely system bandwidth.

19. method as claimed in claim 17, wherein, the power control preamble is that single-time Sounding Reference signal (SRS) is passed It is defeated.

20. method as claimed in claim 17, wherein, the power control preamble be in uplink data channel not Regularly CQI (CQI) report.

21. method as claimed in claim 17, in addition to clearly dispatch the Power Control from the access terminal Leading transmission.

22. method as claimed in claim 21, in addition to：

Send the up-link with clear and definite specify information to permit, the access terminal is when the transmission power control preamble When use the clear and definite specify information；

Second up-link is sent simultaneously with the power control command to permit；And

Receive and sent as pair response of second up-link sent with the power control command license simultaneously The uplink data transmission.

23. method as claimed in claim 17, in addition to impliedly dispatch the Power Control from the access terminal Leading transmission.

24. method as claimed in claim 23, in addition to：

It is described to receive as using the response that the up-link is permitted before the transmission that the up-link is permitted The power control preamble that the predetermined information that access terminal and base station are defined is sent from the access terminal；And

Receive and connect by using up-link license transmitted before the transmission of the power control command from described Enter the uplink data transmission of terminal transmission.

25. method as claimed in claim 17, in addition to as the response to the uplink data transmission, when touching Transmission power control command during clockwork spring part.

26. a kind of can produce the power control command for access terminal based on power control preamble in a wireless communication environment Radio communication device, including：

Module for sending up-link license on the uplink；

For obtaining before data are licensed and are transmitted from the access terminal in the up-link with according to open loop The module for the power control preamble that the power level that estimation is determined is sent；

For sending the power control command being corrected to the power level before uplink data transmission is obtained Module；And

Module for obtaining the uplink data transmission sent with the power level after correction.

27. radio communication device as claimed in claim 26, wherein, the power control preamble is by given transmission Between channel is detected using frequency hopping in interval (TTI) and across up-link biography a part of in whole system bandwidth It is defeated.

28. radio communication device as claimed in claim 26, wherein, the power control preamble is single-time Sounding Reference signal (SRS) transmit.

29. radio communication device as claimed in claim 26, wherein, the power control preamble is in uplink data letter Irregular CQI (CQI) report on road.

30. radio communication device as claimed in claim 26, in addition to：

The module being scheduled for the transmission in a well defined manner to the power control preamble；

For sending the module that the up-link with clear and definite specify information is permitted, wherein access terminal is when the transmission work( The clear and definite specify information is used when rate control is leading；And

For the module for sending second up-link license simultaneously with the power control command via the downlink； And

The uplink data transmission sent to the response that second up-link is permitted is used as obtaining Module.

31. radio communication device as claimed in claim 26, in addition to：

For the module for the transmission for impliedly dispatching the power control preamble；

It is to connect for obtaining as using the response that the up-link is permitted before the up-link license is sent The module for the power control preamble for entering the predetermined information of terminal and base station sets to send；And

Sent out for obtaining the up-link license by using being transmitted before the transmission of the power control command The module for the up-link circuit-switched data transmission sent.

32. radio communication device as claimed in claim 26, in addition to for as to the uplink data transmission Response, the module of delivering power control command when there is trigger condition.