CN101529787B - Dynamic power amplifier backoff using headroom information - Google Patents

Abstract

The invention describes systems and methodologies that facilitate mitigating effect of non-linear distortion from a power amplifier on a spectral mask margin. Power limit indications can be analyzed in scheduling mobile devices. Mobile devices with power limits can be scheduled on inner subbands. The power limits can be based at least in part on power amplifier headroom information. Other mobile devices can employ remaining portions of an allocated spectrum. Further, mobile devices can evaluate and establish a power amplifier backoff based upon the subband scheduling.

Description

Sub-band scheduling and adjustment power amplifier rollback

The cross reference of related application

The application requires U.S. Provisional Patent Application No.60/863 that submit to, that be entitled as " AT PA HEADROOM INFORMATION TO ENABLE DYNAMIC PA BACKOFF IN LBC FDD " on October 26th, 2006,118 rights and interests.The full content of aforementioned application is incorporated herein by reference.

Technical field

Below describe and generally relate to radio communication, more particularly, relate to sub-band scheduling and power amplifier rollback.

Background technology

The Wireless Networking system has become the instrument that generally uses, and most of people in the world realize communication by this instrument.In order to satisfy the demands of consumers and in order to improve portability and convenience, it is littler and more powerful that radio communication device has become.The consumer relies on such as Wireless Telecom Equipments such as cell phone, PDA(Personal Digital Assistant)s very much, and this just requires the overlay area of reliable service, expansion and the function of enhancing.

Usually, wireless multiple-access communication system can be supported the communication of a plurality of wireless terminals or subscriber equipment simultaneously.Each terminal is communicated by letter with one or more access point with the transmission on the reverse link via forward link.Forward link (or perhaps down link) refers to the communication link from the access point to the terminal, and reverse link (or perhaps up link) refers to the communication link from the terminal to the access point.

Wireless system can be to support multi-address system with a plurality of user's communications by sharing available system resource (for example, bandwidth and transmitting power).The example of this multi-address system comprises code division multiple access (CDMA) system, time division multiple access (TDMA) system, frequency division multiple access (FDMA) system and OFDM (OFDMA) system.

Typically, each access point support is positioned at the terminal of the particular coverage that is called the sector.Support the sector of particular terminal to be called as serving sector.Do not support other sector of this particular terminal to be called non-serving sector.Terminal in the sector can be assigned specific resource to allow supporting a plurality of terminals simultaneously.Yet in adjacent sectors, the transmission of terminal is not in par.Therefore, the transmission of the terminal at sector-edge place can cause disturbing and the sector in the deterioration of terminal capabilities.

Summary of the invention

Below will present the simplified summary of one or more embodiment, in order to the basic comprehension to these embodiment is provided.This summary is not the extensive overview of all contemplated embodiments, and neither be intended to determine key or the important element of all embodiment, the also non-scope that is intended to describe any or all embodiment, the form that its only purpose is to simplify presents some concepts of one or more embodiment, as the preorder that more describes in detail that after this presents.

According on the one hand, the method for the nonlinear distortion that alleviates spectral mask surplus (spectral mask margin) is described.This method can comprise based on the power amplifier balance information that comes from first group of mobile device with at least one mobile device, at this first group of mobile device of inside subband scheduling of frequency spectrum distribution.This method also comprises based on the power amplifier balance information that comes from the follow-up one group of mobile device with at least one mobile device, behind the inner subband of scheduling distribution frequency spectrum remainder dispatch follow-up one group of mobile device.

Relate to radio communication device on the other hand.This radio communication device can comprise at least one processor, be used for dispatching at least one at the inside of frequency spectrum subband and have the mobile device of Power Limitation, and dispatch at least one at the remainder of frequency spectrum and do not have the mobile device of Power Limitation, described Power Limitation relates to the power amplifier balance information.Radio communication device also comprises the memory that is coupled to described at least one processor.

Relate to the radio communication device that starts dynamic power amplifier rollback in addition on the other hand.This radio communication device can comprise that at least in part based on the module of inside subband scheduling described first group mobile device of the power amplifier balance information that comes from first group of mobile device at frequency spectrum distribution, described first group of mobile device comprises at least one mobile device.This radio communication device also comprises at least in part based on the module of the power amplifier balance information that comes from follow-up one group of mobile device at the described described follow-up one group of mobile device of remainder scheduling that distributes frequency spectrum, described follow-up one group of mobile device comprises at least one mobile device, and the module that is used for selecting based on the power amplifier balance information at least in part subband.

Relate to the computer program with computer-readable medium in addition on the other hand, computer-readable medium comprises be used to impelling at least one computer to have the code of at least one mobile device of Power Limitation in the scheduling of the inside of frequency spectrum subband.Described code can also impel described at least one computer to dispatch at least one mobile device that does not have Power Limitation at the remainder of described frequency spectrum, and described Power Limitation relates to the power amplifier balance information.

According on the other hand, device in the wireless communication system can comprise processor, based on the inside subband scheduling described first group mobile device of the power amplifier balance information that comes from first group of mobile device at frequency spectrum distribution, described first group of mobile device comprises at least one mobile device at least in part.Described processor can also be used for dispatching described follow-up one group of mobile device based on the power amplifier balance information that comes from follow-up one group of mobile device at the described remainder of frequency spectrum that distributes at least in part, and described follow-up one group of mobile device comprises at least one mobile device.In addition, described processor can be used for selecting subband based on the power amplifier balance information at least in part.And this device can comprise the memory that is coupled to described processor.

Also according on the other hand, the method that helps dynamically to adjust the power amplifier rollback is described.This method can comprise that transmission can realize the periodicity power headroom measurement result that transmitting power is corresponding with maximum.This method can also comprise: announce and one or more corresponding static difference power headroom of focus that are subjected to, and receive allocation of subbands.

Relate to radio communication device on the other hand.This radio communication device can comprise at least one processor, is used for sending with maximum realizing the periodicity power headroom measurement result that transmitting power is corresponding, and announcement and one or more corresponding static difference power headroom of focus that are subjected to.This radio communication device can also comprise the memory that is coupled to described at least one processor.

The radio communication device that relates to the nonlinear distortion that alleviates the spectral mask surplus in addition on the other hand.This radio communication device can comprise the module that can realize the periodicity power headroom measurement result that transmitting power is corresponding with the maximum that is used for bandwidth allocation for sending.In addition, this radio communication device can comprise for announcing and one or more modules that are subjected to the corresponding static difference power headroom of focus.

Relate to the computer program with computer-readable medium on the other hand in addition, computer-readable medium comprises: be used for impelling at least one computer to send and the maximum code that can realize the periodicity power headroom measurement result that transmitting power is corresponding.Described code can also impel described at least one computer to announce and one or more corresponding static difference power headroom of focus that are subjected to, and receives allocation of subbands.

According on the other hand, a kind of device can be provided in wireless communication system, comprise processor, the maximum that is used for sending with being used for bandwidth allocation can realize the periodicity power headroom measurement result that transmitting power is corresponding.In addition, described processor can be used for announcing and one or more corresponding static difference power headroom of focus that are subjected to.In addition, this device can comprise the memory that is coupled to described processor.

In order to realize aforementioned and relevant purpose, one or more embodiment comprise the feature of hereinafter fully describing and specializing in claims.The following description and drawings are at length illustrated some illustrative aspect of one or more embodiment.Yet some in the variety of way of each embodiment principle have only been represented to adopt in these aspects, and described embodiment is intended to comprise all these aspects and is equal to replacement.

Description of drawings

Fig. 1 is the block diagram that helps the system of dynamic power amplifier rollback.

Fig. 2 is the diagram for the channel tree structure of supporting sub-band scheduling.

Fig. 3 is the diagram according to the wireless communication system of the each side of setting forth here.

Fig. 4 is for realizing the diagram of the example wireless communications of dynamic power amplifier rollback based on sub-band scheduling.

Fig. 5 is the diagram according to the wireless communication system of the one or more aspects that present here.

Fig. 6 is the diagram that helps to carry out based on the consideration of Power Limitation the illustrative methods of sub-band scheduling.

Fig. 7 is the diagram that helps to adjust based on sub-band scheduling the illustrative methods of power amplifier rollback.

Fig. 8 is the diagram that helps to come by reverse link the illustrative methods of the allocation of subbands that is used for transmission that signaling transmission information and acquisition dispatch.

Fig. 9 is the diagram that helps the exemplary mobile device of definite power amplifier rollback value.

Figure 10 is the diagram that helps to generate based on Power Limitation information the example system of sub-band scheduling.

Figure 11 is the diagram of example wireless network environment, can use this wireless network environment in conjunction with various system and methods described herein.

Figure 12 is the diagram that helps to generate the example system of sub-band scheduling.

Figure 13 is the diagram that helps the example system of transmitted power balance information.

Embodiment

With reference now to accompanying drawing, describe each embodiment, wherein identical Reference numeral is used to refer to identical member of generation all the time.In the following description, for illustrative purposes, many specific detail have been listed in order to thorough understanding to one or more embodiment is provided.Yet, clearly, can implement this (a bit) embodiment, and need not these specific detail.Under other situation, with the block diagram form known structure and equipment are shown, to help to describe one or more embodiment.

Just as used in this application, term " parts ", " module ", " system " etc. are intended to refer to the entity relevant with computer, both can be combination, the software of hardware, firmware, hardware and software, can be again executive softwares.For example, parts can be but be not limited to, and run on process, processor, object on the processor, can carry out body, execution thread, program and/or computer.As illustration, the application program and the computing equipment that run on the computing equipment all can be parts.One or more parts can be present in process and/or execution thread inside, and parts can be on the computer and/or be distributed between two or many computers.In addition, these parts can be carried out according to the top various computer-readable mediums that store various data structures.Parts can be for example according to (for example having one or more packets, the data that come from parts, another parts in these parts and local system, the distributed system are mutual, and/or pass network and other system interaction such as the internet with signal form) signal, communicate in the mode of this locality and/or teleprocessing.

In addition, in conjunction with mobile device each embodiment is described here.Mobile device can also be called as system, subscriber unit, subscriber station, travelling carriage, mobile phone, distant station, remote terminal, accesses terminal, user terminal, terminal, Wireless Telecom Equipment, user agent, subscriber equipment or user's set (UE).Mobile device can be that cell phone, cordless telephone, session initiation protocol (SIP) phone, wireless local loop (WLL) are stood, PDA(Personal Digital Assistant), the handheld device with wireless connections ability, computing equipment or other treatment facility of being connected with radio modem.In addition, in conjunction with the base station each embodiment is described here.The base station can be used for communicating with mobile device, and can be known as access point, Node B (Node B) or certain other term.

In addition, each side described herein or feature may be embodied as the manufacturing part of method, device or use standard program technology and/or engineering.Term used herein " manufacturing part " is intended to contain can be from the computer program of any computer readable device, carrier or medium access.For example, computer-readable medium (for example can include but not limited to magnetic storage apparatus, hard disk, floppy disk, magnetic sheet etc.), CD (for example, compact disk (CD), digital versatile disc (DVD) etc.), smart card and flash memory device (for example, EPROM, card, bar, key drive etc.).In addition, various storage medium described herein can be represented one or more equipment and/or other machine readable media for storage information.Term " machine readable media " can comprise but not be limited to wireless channel and can store, comprise and/or carry instruction and/or various other media of data.

Technology described herein can be used for various wireless communication systems, for example multi-address communication system, broadcast system, wireless lan (wlan) etc.Term " system " and " network " often use interchangeably.Multi-address system can use the multiple access scheme, for example code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), quadrature FDMA(OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA) etc.Multi-address system can also use the combination of multiple access scheme, and for example, one or more multiple access schemes are used for down link, and one or more multiple access scheme is used for up link.

OFDMA uses OFDM (OFDM), and this is a kind of multicarrier multiplexing scheme.SC-FDMA can use local frequency division multiplexing (LFDM), FDM(IFDM interweaves), strengthen FDM(EFDM) etc., these are totally to be called as single carrier FDM(SC-FDM) different single carrier multiplexing schemes.OFDM and SC-FDM are divided into a plurality of (K) orthogonal sub-carriers with system bandwidth, and these subcarriers also are called as tone, frequency etc. usually.Each subcarrier data available is modulated.Generally speaking, in frequency domain, send modulation symbol with OFDM, and in time domain, send modulation symbol with SC-FDM.LFDM is at the continuous sub-carriers transmitting data, and IFDM is at the subcarrier transmitting data across bandwidth distribution, and EFDM is at continuous subcarrier group transmitting data.

OFDM has some desirable characteristic, comprises the ability of ubiquitous multipath effect in the antagonism terrestrial communications systems.Yet the major defect of OFDM is that the peak-to-average power ratio (PAPR) of OFDM waveform is very high, and namely the peak power of OFDM waveform can be higher with the ratio of average power.High PAPR is owing to may increasing by homophase (or relevant) when all subcarriers are modulated with data independently.The high PAPR of OFDM waveform does not wish to exist, and can make mis-behave.For example, the big peak value in the OFDM waveform can cause power amplifier to run on high nonlinear area or may amplitude limit (clip), other consequence that this can cause intermodulation distortion thereupon and may worsen signal quality.For fear of non-linear, power amplifier should move with the rollback of the average power level that is lower than max power level.Come the operate power amplifier by the rollback with offset peak power, wherein this rollback in one example can be in the scope of 4-7dB, and power amplifier can be handled the big peak value in the waveform, and does not produce excessive distortion.

SC-FDM(for example LFDM) has some desirable characteristic, for example similarly resists the robustness of multipath effect with OFDM.In addition, owing in time domain, utilize SC-FDM to send modulation symbol, so SC-FDM does not have high PAPR.The PAPR of SC-FDM waveform is decided by the signaling point among the signal constellation (in digital modulation) figure (constellation) (for example, M-PSK, M-QAM etc.) of selected use.Yet the time domain modulation symbol among the SC-FDM is owing to the non-flat forms communication channel is easy to take place intersymbol interference.Can carry out equalization at the symbol that receives, to alleviate the ill-effect of intersymbol interference.

On the one hand, OFDM and SC-FDM(for example LFDM) can be used for transmission on the given link (for example, up link).Usually, the link efficiency of OFDM waveform is higher than the link efficiency of SC-FDM waveform.The higher link efficiency of OFDM is offset by the OFDM power amplifier rollback bigger than the power amplifier rollback of SC-FDM.Therefore SC-FDM has the low PAPR that is better than OFDM.For the UE with high s/n ratio (SNR), the gain of the junctor level of OFDM can surpass the PAPR advantage of SC-FDM.By using OFDM and SC-FDM, system can be from benefiting the higher link efficiency of the OFDM of high SNR scene and the PAPR advantage at the SC-FDM of low SNR scene.

Usually, any SC-FDM scheme all can be used with OFDM.And, OFDM and SC-FDM can one be used from up link or down link or up link and down link the two.For the sake of clarity, most of common use of describing all at the OFDM on the up link and LFDM below.

Referring now to Fig. 1,, shows the block diagram of the system 100 that dynamic power amplifier rollback is provided.System 100 comprises at least one mobile device 104 of supporting the sector of at least one base station 102 and base station 102.Based on context the term sector can refer to base station and/or the zone that is covered by the base station.For simplicity, single base station and mobile device are shown.Yet system 100 can comprise a plurality of base stations and mobile device.Obviously, the sub-band scheduling of mobile device 104 can be controlled in base station 102.Especially, by mobile device being dispatched adaptively on the finite region of band system band according to channel conditions, sub-band scheduling can be realized multi-user's diversity gain.The subband size should provide enough frequency diversities, with the mis-behave of the mobile device of avoiding rapid movement, and prevents that service dispatch with same levels from causing the deterioration of sector throughput.Little subband also can cause the junction efficiency loss (for example, subband is more little, and candidate's mobile device of selecting in every subband is more few) of sub-band scheduling.Although in some cases, can be on the subband basis (for example such as those dispatching algorithms described here, one or more subbands) going up scheduling and distribute, but can also distribute with other unit, is unit with one or more base node as described below for example.

Turn to Fig. 2 temporarily, show the have local frequency hopping exemplary channel tree of (local hopping).The bandwidth that is scheduled in certain subband and distributes is crossed over subband less than the mobile device of whole subband and is carried out local frequency hopping, so that the maximum channel interference diversity.In Fig. 2, each base node maps to a plurality of continuous tones (for example, shown 16) in frequency.The set of 8 base node is mapped to a subband, and this subband is made of 128 continuous tones.In this subband, the group that 16 tones (for example, base node) are formed is carried out frequency hopping with pseudo-random fashion.Except the sub-band scheduling pattern, diversity mode also is useful.User's (for example, the sector covers highway) of rapid movement can mainly be served in the sector.In the case, the channel basis node can carry out frequency hopping across whole frequency band.

Return referring to Fig. 1, in order to support sub-band scheduling, in one example, mobile device 104 can with respect to different sub-band to the base station 102 feedbacks that provide about forward link channel characteristics.The reverse link expense that feedback quantity answers gain in the forward link performance that balance (for example) brings owing to sub-band scheduling and feedback channel to cause.Except the sub-band scheduling feedback, the suitable compromise load that depends on the reverse control channel of other The function of backward power control information of carrying.

According to one side of the present disclosure, mobile device 104 is 102 transmitted power restricted informations to the base station.Base station 102 adopts the Power Limitation information that receives to come at subband scheduling mobile device 104.Power Limitation information can comprise power amplifier (PA) size and/or the performance-relevant information with mobile device 104.In addition, Power Limitation information can comprise and can be used on the different capacity level that dissimilar branches are mixed.For example, mobile device 104 can have one or more available power levels in inner subband, and has one or more different available power level at the edge subband.For example, if the distribution of mobile device 104 across whole bandwidth, inner subband and/or single base node, this mobile device 104 can also be reported the maximum power that it can obtain so.In addition, this information can transmit interference constraints effect (if existence).And Power Limitation information can comprise the position of given sector or inside, residential quarter and/or with respect to the positional information of more than one sector or residential quarter.Moreover the Power Limitation information of mobile device 104 transmission can comprise the carrier-in-interference parameter by mobile device 104 experience.Though Fig. 1 described mobile device 104 to the base station 102 transmit power restrictions information, it will be appreciated that base station 102 can from its link and with the communicating by letter of mobile device 104 know such information by inference.For example, base station 102 can be estimated the power level that receives or the feedback that receives, to know the power constraint that puts on the mobile device 104 by inference.

Base station 102 adopts Power Limitation information to come the subband scheduling mobile device 104 that can use in system 100.According to one side of the present disclosure, the mobile device of power limited is mainly dispatched in base station 102 at inner subband.The mobile device that does not have Power Limitation in remaining frequency spectrum scheduling.In example, when selecting subband, the Power Limitation of mobile device 104 is also considered in base station 102 except considering the channel selectivity across subband.In addition, base station 102 sends to mobile device 104 and represents that subband will be by the schedule information of mobile device 104 uses.

Referring now to Fig. 3,, the wireless communication system 300 according to each embodiment that presents is shown here.System 300 comprises base station 302, and this base station 302 can comprise a plurality of antenna groups.For example, antenna groups can comprise antenna 304 and 306, and another group can comprise antenna 308 and 310, and an other group can comprise antenna 312 and 314.At each antenna group two antennas are shown, yet more or less antenna can be used for each group.Base station 302 can comprise transmitter chain and receiver chain extraly, and as skilled in the art will understand, they can comprise successively with signal and transmit and receive relevant a plurality of parts (for example, processor, modulator, multiplexer, demodulator, demodulation multiplexer, antenna, etc.).

Base station 302 can communicate with the one or more mobile devices such as mobile device 316 and mobile device 322; Yet, should be appreciated that base station 302 can communicate with any amount of mobile device basically of similar mobile device 316 and 322. Mobile device 316 and 322 can for example be any other suitable equipment that cell phone, smart phone, laptop computer, handheld communication devices, handheld computing device, satelline radio, global positioning system, PDA and/or be used for communicate by letter at wireless communication system 300.As shown in the figure, mobile device 316 is communicated by letter with 314 with antenna 312, and antenna 312 and 314 passes through forward link 318 to mobile device 316 transmission information, and passes through reverse link 320 from mobile device 316 reception information.In addition, mobile device 322 is communicated by letter with 306 with antenna 304, and antenna 304 and 306 passes through forward link 324 to mobile device 322 transmission information, and passes through reverse link 326 from mobile device 322 reception information.In frequency division multiplexing (FDD) system, for example, forward link 318 can use the frequency band different with reverse link 320, and forward link 324 can adopt the frequency band different with reverse link 326.In addition, in time division multiplexing (TDD) system, forward link 318 and reverse link 320 can use common frequency band, and forward link 324 and reverse link 326 can use common frequency band.

The designated zone for communication in each antenna group and/or their can be called as 302 sector of base station.For example, the antenna groups mobile device that can be designed in the sector with 302 overlay areas, base station communicates.When passing through forward link 318 and 324 communicate by letter, the transmitting antenna of base station 302 can adopt wave beam forming to improve the signal to noise ratio of forward link 318 and 324 at mobile device 316 and 322.And, though base station 302 uses wave beam forming to launch to the mobile device 316 and 322 of random dispersion in relevant coverage, but launch to its all mobile devices by individual antenna with the base station and to compare, the interference that the mobile device in the neighbor cell is subjected to may be still less.According to example, system 300 can be multiple-input and multiple-output (MIMO) communication system.And system 300 can use the multiplex technique (such as FDD, TDD etc.) of any kind to come divide communication channels (for example, forward link, reverse link ...).

Turn to Fig. 4 now, the wireless communication system 400 that carries out sub-band scheduling based on the consideration of Power Limitation is shown.System 400 comprises and mobile device 404(and/or any amount of different mobile device (not shown)) communication base station 402.Base station 402 can be by forward link channel to mobile device 404 transmission information; Base station 402 also by reverse chain channel from mobile device 404 reception information.In addition, system 400 can be mimo system.

System 400 adopts the mitigation technique of the non-linear distortion effects that reduces the spectral mask surplus.The non-linear relation phenomenon is relevant between the input of nonlinear distortion and for example electronic equipment and the output.According to one side, relevant non-linear relation relates to power amplifier.

Mobile device 404 can comprise Power Limitation indicating device 410, rollback estimator 412 and power amplifier 404.The Power Limitation indicating device 410 of mobile device 404 is identified for reflecting the Power Limitation indication of the power constraint that imposes on mobile device 404.Mobile device 404 sends to base station 402 with the Power Limitation indication.Should be appreciated that base station 402 can be known this kind information by inference from its link and with communicating by letter of mobile device 404.For example, base station 402 can be estimated the power level that receives or the feedback that receives, to determine to be applied to any power constraint on the mobile device 404.The Power Limitation indication can comprise power amplifier size or the performance-relevant information with mobile device 404.In addition, Power Limitation indicating device 410 can transmit interference constraints effect (if existence).Moreover, Power Limitation information can comprise in given sector or the residential quarter the position and/or with respect to the positional information of an above sector or residential quarter.In addition, the Power Limitation information of mobile device 404 transmissions can comprise the carrier-in-interference parameter of mobile device 404 experience.

Sub-band scheduling is indicated to determine from mobile device 404 received powers restriction indication and with this in base station 402.Base station 402 comprises subband selector 406 and subband scheduler 408.Subband selector 406 is based on selecting subband to the indication of the Power Limitation of mobile device 404 with across the consideration of the channel selectivity of subband.Mobile device 404 and other mobile device that subband scheduler 408 scheduling base stations 402 are served.According to one side of the present disclosure, the mobile device that subband scheduler 408 mainly has Power Limitation in inner subband scheduling.For example, can be in inner subband scheduling sector or the cell edge place have high quality-of-service (Qos) user of size-constrained power amplifier.Best effort (best effort) user at the sector that can also retrain not disturbed control on the subband of the inside of spectrum allocation may or cell edge place (for example, user's transmitting power is not subjected to the restriction of the busy bit (busy bit) from adjacent sectors) dispatches.In addition, there is not the mobile device of Power Limitation in subband scheduler 408 in remaining frequency spectrum scheduling.For example, can be after the scheduling power limited users, in the remainder of frequency spectrum scheduling sector or the best effort user (for example, user's transmitting power is subjected to the restriction from the busy bit of nearby sectors) that retrains of the disturbed control in cell edge place.In addition, the user with large scale power amplifier can be scheduled with the user with high carrier-in-interference (C/I) ratio on all the other frequency spectrums that distribute.In one example, the user with high C/I can only benefit from the extra increment of C/I slightly, and the extra increment of this C/I can be produced by the scheduling on the zone line of frequency spectrum distribution.

Inner subband is the subband away from spectrum allocation may or total bandwidth edge.The outer emission of band be produced by modulation treatment tightly be in institute distribute the bandwidth outside and/or with distribution bandwidth emission on the frequency of certain distance is arranged.Be with outer launching electrical level to depend on the degree of approach at the edge of total bandwidth that distribution crosses over and this span and spectrum allocation may or system's maximum bandwidth.Usually, distribute span more big (for example, wide distribution), be with the outer launching electrical level can be more high.In addition, distribution more far away apart from the edge brings the outer launching electrical level of more low band.Be with the outer launching electrical level can be measured, distribute the function of the gross power on the 1MHz as adjacent channel.According to example, total transmitting power of adding up at 1MHz should be no more than-13dBm.In addition, for the average transmission power of common 23dBm, spectral mask is the about 30dB of decay in contiguous 1MHz.

Poor between the launching electrical level that the spectral mask surplus is defined as allowing and the actual transmission level.Spectral mask surplus L _MaskCan be provided by following formula:

$L_{\mathrm{mask}}=10*{\log }_{10}\left(\frac{\∫s\left(f\right)\mathrm{df}}{\underset{1\mathrm{MHz}}{\∫}s\left(f\right)\mathrm{df}}\frac{P_{\mathrm{mask}}}{P_{\mathrm{TX}}}\right)$

According to this illustration, P _MaskCan limit for mask.According to example, P _MaskShould be no more than-13dBm.P _TXCan represent total transmitting power.S (f) represents the power spectral density of power amplifier output place, and for example, wherein parameter ∫ S (f) df can represent to get the interior power of frequency band of integration.Parameter

Can for example be the power on the adjacent channel distribution 1MHz.Surplus between expression launching electrical level that allow and reality.Negative value represents that the launching electrical level that allows is excessive.

If mobile device 404 uses big rollback or is given little distribution, then mobile device 404 all has enough surpluses in the edge subband in OFDMA and LFDMA system.Adopt at mobile device 404 under the situation of little rollback, the medium and big distribution of OFDMA equipment utilization and have negative surplus, and LFDMA user utilizes medium distribution and have positive surplus.For the user who dispatches at middle or inner subband, these users all have positive surplus with low rollback in OFDMA and LFDMA system.By dispatched users in middle subband, OFDMA and LFDMA all have enough spectral mask surpluses, or even with the 0dB rollback, and this rollback represents that the two all can move with so low rollback.Therefore, when away from spectrum allocation may edge dispatched users, with respect to LFDMA, the PAPR inferior position of OFDMA does not influence its power efficiency.

Base station 402 will be distributed and schedule information sends to mobile device 404.Mobile device 404 comprises rollback estimator 412, is used for determining based on schedule information the rollback of power amplifier 414.The schedule information that receives at mobile device 404 is illustrated under the situation of carrying out medium or big allocation schedule in the edge subband, and rollback estimator 412 will be determined big rollback.Usually, this rollback for the OFDMA system than LFDMA system larger about 2dB, in order to keep the surplus similar to spectral mask.Yet, if being illustrated on the medium or inner subband, subband scheduler 408 dispatches mobile device, rollback estimator 412 determines for example to be enough to keep for spectral mask the low rollback of enough masks.According on the one hand, when at inner subband scheduling mobile device 404, rollback estimator 412 is adjusted power amplifiers 414 to adopt low rollback (for example, higher transmitting power).When the edge subband is dispatched, power amplifier 414 is with higher rollback (for example, lower transmitting power) operation.In addition, can consider the width that distributes.For example, when only when 16 continuous carriers (for example, a base node) are gone up scheduling mobile device 404, in one example, owing to distribute the narrower part that is closely adjacent to each other and crosses over whole bandwidth, the outer emission of band is lower.In this case, can tolerate low rollback and high transmit power.

According to example, Power Limitation indicating device 410 can comprise and/or the power amplifier balance information of definite mobile device 404; In one example, the power amplifier balance information maximum that relates to mobile device 404 can realize emission and/or received power.For example, information can be sent to base station 402, in order to rated output amplifier balance information; The maximum that the power amplifier balance information relates to base station 402 can realize received power, and the maximum of base station 402 can realize that received power can realize that with the maximum of mobile device 404 transmitting power is corresponding.This can calculate at given be subjected to focus or potential bandwidth allocation, for example, and at subband edge, inner subband and/or at single base node (for example, described with reference to figure 2).According to example, can be by the outer report of band (for example, pass through Dedicated Control Channel) and/or the interior report of band is (for example, part as packet, for example, in its media interviews control (MAC) header), for example, during the reverse link channel assignment and/or similarly, this information is periodically sent to base station 402 from mobile device 404.In one example, such information can be used for actual bandwidth allocation.In addition, mobile device 404 can announce with potential bandwidth allocation and/or list before be subjected to the corresponding static difference power margin information of focus; Should be appreciated that As time goes on this information can keep relative fixed.In this respect, base station 402 can be by the corresponding power surplus of carrying out periodic report and the addition of corresponding static difference power headroom with actual bandwidth allocation, calculates with one type bandwidth allocation or is subjected to the relevant power headroom of focus.For example, subband can be selected by subband selector 406 based on this information and/or be dispatched by subband scheduler 408 at least in part.

Referring now to Fig. 5,, diagram is according to the wireless communication system 500 of the each side that presents here.System 500 can comprise one or more access points 502, wireless communication signals reception, emission, re-transmission etc. is given each other and/or given one or more terminals 404.Each base station 502 can comprise a plurality of transmitter chains and receiver chain, for example, a chain that is used for respectively transmitting and receiving antenna, each chain can comprise successively and a plurality ofly transmit and receive relevant parts (for example, processor, modulator, multiplexer, demodulator, demodulation multiplexer, antenna etc.) with signal.Terminal 504 can be for example cell phone, smart phone, laptop computer, handheld communication devices, handheld computing device, satelline radio, global positioning system, PDA and/or be used for other equipment that is fit to by wireless system 500 communications.In addition, each terminal 504 can comprise one or more transmitter chains and receiver chain, for example is used for multiple-input and multiple-output (MIMO) system.As skilled in the art will understand, each transmitter and receiver chain can comprise with signal and transmits and receives relevant a plurality of parts (for example, processor, modulator, multiplexer, demodulator, demodulation multiplexer, antenna etc.).

As shown in Figure 5, each access point covers for specific geographical area 506 provides communication.Term " residential quarter " can refer to an access a little and/or its overlay area according to context.In order to improve systematic function, the access point overlay area can be divided into a plurality of littler zones (for example, three littler regional 508A, 508B and 508C).Each littler zone provides service by base station transceiver subsystem (BTS) separately.Term " sector " can refer to BTS and/or its overlay area according to context.For the residential quarter of sectorization, the base station transceiver subsystem that is used for these all sectors, residential quarter is co-located at usually in the access point of this residential quarter.

Terminal 504 is dispersed in the whole system 500 usually.Each terminal 504 can be that fix or mobile.Each terminal 504 can be communicated by letter with one or more access point 502 with reverse link by forward direction at any given time.

For centralized framework, system controller 510 and access point 502 couple and provide coordination and the control to access point 502.For distributed framework, access point 502 can communicate with one another as required.Communication by system controller 510 grades between the access point can be called as backhaul (backhaul) signaling.

Technology as described herein can be used for having the system 500 of sectorized cells and having the not system of sectorized cells.For the sake of clarity, below describe at the system with sectorized cells.Term " access point " is generally used for the fixed station of serving into the fixed station of sector service with for the residential quarter.Term " terminal " and " user " use interchangeably, and term " sector " and " access point " also use interchangeably.Service Access Point/sector is access point/sector that terminal is communicated by letter with it.Neighboring access point/sector is access point/sector that terminal is not communicated by letter with it.

Referring to Fig. 6-8, the method that relates to based on the interfere information adjustment power of reverse link of broadcasting is shown.Though for the purpose of simplifying the description, illustrate and describe this method with a series of actions, but should be appreciated that and recognize, this method is not limit by the order of action, this is because according to one or more embodiment, some actions can take place simultaneously with the different order that illustrates here and describe and/or with other action.For example, it will be understood by those skilled in the art that and recognize, alternately, can come technique of expression with a series of relevant states or event (for example state block diagram).And according to one or more embodiment, manner of execution does not need all illustrated actions.

Turn to Fig. 6, illustrate and help based on the consideration of the Power Limitation designator in the wireless communication system and in the method 600 of subband scheduling mobile device.In Reference numeral 602 places, received power restriction indicators.The Power Limitation designator can comprise the information with the carrier-in-interference relating to parameters that has the position in (if existence), given sector or the residential quarter and/or experience about positional information and the mobile device of an above sector or residential quarter of power amplifier size or performance, interference constraints except out of Memory.At Reference numeral 604 places, select subband.This selection can be based on the Power Limitation of mobile device, across at least one in the channel selectivity of subband etc.At Reference numeral 606 places, dispatch mobile device at subband.Dispatch based on the Power Limitation designator that receives.For example, the user of inner subband scheduling power limited system, and dispatch the mobile device that does not have Power Limitation at the remainder of spectrum allocation may.

Turn to Fig. 7, the method 700 that helps to adjust based on the consideration of Power Limitation and sub-band scheduling information the power amplifier rollback is shown.At Reference numeral 702 places, for example, the Power Limitation designator is sent to base station or access point.The Power Limitation designator also can comprise the information with the carrier-in-interference relating to parameters that has the position in (if existence), given sector or the residential quarter and/or experience about positional information and the mobile device of an above sector or residential quarter of power amplifier size or performance, interference constraints except out of Memory.At Reference numeral 704 places, receive sub-band scheduling information.Sub-band scheduling information can comprise distribute subband to be adopted in the frequency spectrum.For example, schedule information can be represented inside subband to be used.At Reference numeral 706 places, schedule information is used for treating the power amplifier rollback that puts on power amplifier and estimates.For example, if schedule information is represented the use of inner subband, can determine low rollback.On the contrary, if this information is represented to use the edge subband, can determine high rollback, in order to keep enough spectral mask surpluses.

Referring to Fig. 8, illustrate and help by uplink signalling transmission information and obtain method 800 for the allocation of subbands of dispatching of transmission.At 802 places, comprise that the information of Power Limitation can be transferred to the base station by signaling by reverse link.According to example, the part that this information can be used as request is sent out; Yet theme required for protection is not limited to this.At 804 places, can obtain allocation of subbands from the base station, wherein can generate this distribution based on the signaling information transmitted at least in part.For example, the signaling information transmitted can be used for determining one or more spectral mask surpluses for subscriber signaling transmission information by the base station.Further, this surplus relevant with producing allocation of subbands can be considered in the base station.At 806 places, can come by the rl transmission business by adopting this allocation of subbands.Like this, for example can locate to finish rl transmission according to appointed frequency, time, speed etc. in the allocation of subbands.

Should be appreciated that according to one or more aspects described herein, can make about the user who determines Power Limitation, determine to dispatch at inner subband, determine the deduction of the power amplifier rollback that is fit to etc.As used herein, term " deduction " or " inference " are often referred to the process of releasing or indicate system, environment and/or state of user according to the one group of observed result that obtains via event and/or data.For example, can identify specific situation or action with inference, perhaps can produce probability distribution about state with inference.This inference can be probabilistic---namely, calculate the probability distribution of the state of paying close attention to based on the consideration of data and event.Inference can also refer at constituting the technology that the higher level event adopts according to one group of event and/or data.This inference causes constituting new events or action according to the event data of one group of event that observes and/or storage, no matter whether these events have nearer degree around, and also no matter whether these events and data come from one or some events and data source.

According to example, the one or more methods that more than present can comprise make with at least in part based on the consideration of Power Limitation information and in the relevant inference of subband scheduling mobile device of frequency spectrum distribution.As further illustration, can make and determine the inference that the power amplifier rollback is relevant based on the consideration of sub-band scheduling.Should be appreciated that aforesaid example is actually illustrative, and be not to be intended to the quantity of the inference made is limited, perhaps to limiting in conjunction with the mode that each embodiment described herein and/or method are made this interference.

Fig. 9 is the diagram that helps to adjust based on the consideration of the interfere information of broadcasting the mobile device 900 of power of reverse link.Mobile device 900 comprises receiver 902, for example receives signal from the reception antenna (not shown), and carries out typical action (for example, filtering, amplification, down-conversion etc.) to the received signal and classical signal is carried out digitlization to obtain sampling.Receiver 902 can be MMSE receiver for example, and can comprise demodulator 904, but the symbol that these demodulator 904 demodulation receive and they are offered processor 906 for channel estimating.Processor 906 can be the processor that is exclusively used in the information that analysis receiver 902 receives and/or generates the information that is used for transmitter 916 emissions, the processor of one or more parts of control mobile device 900, and/or both the information that receives of analysis receiver 902, generate the information that is used for transmitter 916 emissions, control the processor of one or more parts of mobile device 900 again.

Mobile device 900 can also comprise memory 908, this memory 908 functionally is connected to processor 906 and can be stored data to be launched, the data that receive, the information relevant with available channel, the data relevant with the signal of having analyzed and/or interference strength, the information relevant with allocated channel, power, speed etc., and be used for to estimate channel and any other suitable information of communicating by letter by channel.Memory 908 can also be stored and estimate and/or use channel (for example, based on performance, based on capacity etc.) relevant agreement and/or algorithm.

Should be appreciated that data storage device described herein (for example, memory 908) can be volatile memory or nonvolatile memory, perhaps can comprise volatile memory and nonvolatile memory.And unrestricted, nonvolatile memory can comprise read-only memory (ROM), programming ROM, electrically programmable ROM(EPROM as illustration), electric erasable PROM(EEPROM) or flash memory.Volatile memory can comprise the random-access memory (ram) that serves as external cache.As illustration and unrestricted, RAM can be many forms have for example synchronous random access memory (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDR SDRAM), the SDRAM(ESDRAM that strengthens), synchronization link DRAM(SLDRAM) and direct dynamic (Rambus) RAM(DRRAM of high speed of burst access).The memory 908 of native system and method is intended to comprise but not is limited to the memory of these and any suitable type.

Processor 906 further operationally couples the most Power Limitation indicating device 910 of mobile device 900 definite Power Limitation.Power Limitation can comprise the information relevant with power amplifier size or mobile device 900 performances.In addition, this indicating device can transmit interference constraints effect (if existence).And, Power Limitation information can comprise in given sector or the residential quarter the position and/or about the positional information of an above sector or residential quarter.In addition, the Power Limitation information of mobile device 902 emissions can comprise the carrier-in-interference parameter of mobile device 902 experience.Power Limitation indicating device 910 sends to base station or access point by transmitter 916 with Power Limitation.In addition, receiver 902 is coupled to the rollback estimator, and the sub-band scheduling information that this rollback estimator can use from the base station or access point receives is in order to be the definite rollback that is fit to of power amplifier of mobile device 900.Mobile device 900 also further comprises modulator 914 and to for example transmitter 916 of base station, another mobile device etc. transmit (for example, Power Limitation designator).Though be described to be separated with processor 906, should be appreciated that Power Limitation indicating device 910, rollback estimator 912 and/or modulator 914 can be the parts of processor 906 or a plurality of processor (not shown).

Figure 10 is the diagram that helps to reduce the system 1000 that controls the required feedback quantity of forward link transmissions in the mimo system of carrying out the PGRC scheme.System 1000 comprise have receiver 1010 and transmitter 1020 base station 1002(for example, access point,), this receiver 1002 receives signal by a plurality of reception antennas 1006 from one or more mobile devices 1004, and this transmitter 1020 is launched to one or more mobile devices 1004 by transmitting antenna 1008.Receiver 1010 can be from reception antenna 1006 reception information, and operationally are associated with the demodulator 1012 that the information that receives is carried out demodulation.The signal of demodulation is analyzed by processor 1014, processor 1014 can be similar to above processor described in conjunction with Figure 9, and couple with memory 1016, the relevant information of 1016 storages of this memory and estimated signal (for example, pilot tone) intensity and/or interference strength, send to or be received from mobile device 1004(or other base station (not shown)) data and/or any other suitable information relevant with function with each action of carrying out statement here.Processor 1014 also couples with the subband selector 1018 of selecting subband.Subband selector 1018 is selected subband based on the Power Limitation indication of mobile device with across the channel selectivity of subband.

Subband selector 1018 is connected with subband scheduler 1020.Subband scheduler 1020 is dispatched mobile device 1004 based on the consideration of the Power Limitation information that receives from mobile device 1004.For example, the mobile device that has Power Limitation in the scheduling of inner subband, and distribution frequency spectrum remainder dispatch the mobile device that does not have Power Limitation.Modulator 1022 can be undertaken multiplexing by the control information that antenna 1008 is transmitted to mobile device 1004 to reflector 1024.Mobile device 1004 can be similar to the mobile device of describing with reference to Fig. 9 900, and adopts sub-band scheduling to adjust the power amplifier rollback.Should be appreciated that according to the disclosure and can use other function.Though be described to separate with processor 1014, should be appreciated that subband selector 1018, subband scheduler 1020 and/or modulator 1022 can be the parts of processor 1014 or a plurality of processor (not shown).

Figure 11 illustrates the example of wireless communication system 1100.For the sake of simplicity, wireless communication system 1100 is described a base station 1110 and a mobile device 1150.Yet, should be appreciated that system 1100 can comprise more than one base station and/or more than one mobile device, wherein extra base station with/mobile device can be similar substantially or different with exemplary base 1110 described below and mobile device 1150.In addition, should be appreciated that base station 1110 and/or mobile device 1150 can adopt system described herein (Fig. 1,3-5 and 9-10) and/or method (Fig. 6-8), to help the radio communication between them.

1110 places in the base station, the business datum of a plurality of data flow offers emission (TX) data processor 1114 from data source 1112.According to example, each data flow can be launched by antenna separately.TX data processor 1114 is based upon the specific coding scheme that data flow selects this business data flow is formatd, encodes and interweaves, so that the data behind the coding to be provided.

Data available orthogonal frequency division multiplexing (OFDM) technology behind each data stream encoding is re-used with pilot data.In addition or alternately, frequency pilot sign can be frequency division multiplexing (FDM), Time Division Multiplexing or code division multiplexing (CDM).Pilot data is generally known data patterns, and this data pattern is processed and can be used on mobile device 1150 and sentence the estimation channel response in known manner.Data behind pilot tone behind each data flow multiplexing and the coding (for example can be based upon certain modulation schemes that data flow selects, bi-phase shift keying (BPSK), quadriphase PSK (QPSK), M phase shift keying (M-PSK), M quadrature amplitude modulation (M-QAM) etc.) (for example modulate, sign map), so that modulation symbol to be provided.The data transfer rate of each data flow, coding and modulation can be determined by processor 1130 instructions that carry out or that provide.

The modulation symbol of data flow can be offered TX MIMO processor 1120, this processor 1120 can also be handled modulation symbol (for example, at OFDM).TX MIMO processor 1120 is then with N _TIndividual stream of modulation symbols offers N _TIndividual transceiver (TMTR/RCVR) 1122a-1122t.In each embodiment, TX MIMO processor 1120 is applied to beam forming weight on the symbol and antenna of data flow, and wherein symbol is launched from antenna.

Each transceiver 1022 receives and handles symbol stream separately, and so that one or more analog signals to be provided, the step of going forward side by side joint (for example, amplification, filtering and up-conversion) analog signal is to provide the signal that is suitable for after the modulation that mimo channel is launched.Further, from the N of transceiver 1022a-1022t _TSignal after the individual modulation is respectively from N _TIndividual antenna 1024a-1024t launches.

At mobile device 1150 places, the signal after the modulation of emission is by N _RIndividual antenna 1152a-1152r receives, and offers separately transceiver (TMTR/RCVR) 1154a-1154r from the signal that each antenna 1152 receives.Each transceiver is regulated (for example, filtering, amplification and down-conversion) signal separately, and the signal that digitlization is regulated to be providing sampling, and further handles this and sample to provide corresponding " receiving " symbol stream.

RX data processor 1160 can receive and handle from N based on specific receiver treatment technology _RThe N of individual transceiver 1154 _RIndividual receiving symbol stream is to provide N _TIndividual " detection " symbol stream.RX data processor 1160 can carry out demodulation, deinterleaving and decoding to the symbol stream of each detection, to recover the business datum of data flow.The processing complementation that the TXMIMO processor 1020 at the processing of RX data processor 1160 and 1100 places, base station and TX data processor 1114 are carried out.

Processor 1170 is periodically definite pre-coding matrix that will use as discussed above.In addition, processor 1170 can comprise matrix index partly and the reverse link message of order (rank) value part by formulism.

Reverse link message can comprise the various types of information about communication link and/or the data flow that receives.Reverse link message can be handled by TX data processor 1138, by modulator 1180 modulation, regulate and be launched go back to base station 1110 by transceiver 1154a-1154r, wherein, processor 1138 is also from the business datum of data source 1136 receptions at a plurality of data flow.

1110 places in the base station are received, are regulated, handled by demodulator 1140 demodulation and by RX data processor 1142, to extract the reverse link message of mobile device 1150 emissions by transceiver 1122 by antenna 1124 from the signal after the modulation of mobile device 1150.In addition, processor 1130 can be handled the message that is extracted, to be identified for determining the pre-coding matrix of beam forming weight.

Processor 1130 and 1170 can instruct the operation at (for example, control, coordination, management etc.) base station 1110 and portable terminal 1150 places respectively.Processor 1130 can be connected with 1172 with the memory 1132 of storage program coding and data respectively with 1170.Processor 1130 and 1170 also can be carried out calculating respectively, estimates with the frequency and the impulse response that obtain up link and down link.

Should be appreciated that the embodiments described herein can be embodied as hardware, software, firmware, middleware, microcode or its combination in any.Realize that for hardware processing unit can be embodied as one or more application-specific ICs (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, be designed to carry out other electronic unit or its combination of institute's representation function here.

When realizing present embodiment with software, firmware, middleware or microcode, procedure code or code segment, they can be stored in the machine readable media, for example memory unit.Code segment can be represented process, function, subprogram, program, routine, subroutine, module, software kit, class, the combination in any of perhaps instruction, data structure or program statement.By transmitting and/or reception information, data, independent variable, parameter or memory content, code segment can couple with another code segment or hardware circuit.Information, independent variable, parameter, data etc. can utilize any suitable mode that comprises Memory Sharing, message transmission, token transmission, network transmission etc. to be transmitted, transmit or launch.

Realize that for software technology described herein can realize with the module (for example, process, function etc.) of carrying out function described herein.Software code can be stored in the memory cell and by processor and carry out.Memory cell can be implemented in processor inside or processor outside, and as known in the art, memory cell can be via the variety of way coupled in communication to processor in this case.

Referring to Figure 12, the system 1200 that helps to generate to the interference indication of a plurality of mobile device broadcasting is shown.For example, system 1200 can be present in inside of base station at least in part.Should be appreciated that system 1200 is represented as and comprises functional block, these functional blocks can be that expression is by the functional block of the function of processor, software or its combination (for example, firmware) execution.System 1200 comprise can symphyogenetic electronic unit logical groups 1202.For example, logical groups 1202 can comprise electronic unit 1204, is used for coming at first group of mobile device of the inside of the frequency of distributing subband scheduling based on the power amplifier balance information from the first group of mobile device that comprises at least one mobile device at least in part.For example, the mobile device of power limited can distribution frequency spectrum the inside subband be scheduled.According to example, the power amplifier balance information can comprise periodic information and static difference information as mentioned above.In addition, logical groups 1202 can comprise electronic unit 1206, be used at least in part based on the power amplifier balance information from the follow-up one group of mobile device that comprises at least one mobile device come distribution frequency spectrum remainder dispatch follow-up one group of mobile device.For example, as mentioned above, do not have Power Limitation mobile device can based on the power amplifier balance information after the mobile device of scheduling power limited, be assigned to distribute the remainder of frequency spectrum.In addition, logical groups 1202 can comprise for the electronic unit 1208 of selecting subband at least in part based on the power amplifier balance information.According to example, can select subband based on the Power Limitation of mobile device and across the consideration of the channel selectivity of subband.Moreover system 1200 can comprise the memory 1210 of holding instruction, and instruction be used for to be carried out and electronic unit 1204,1206 and 1208 relevant functions.Though electronic unit 1204,1206 and 1208 is shown in memory 1210 outsides, should be appreciated that one or more being present in the memory 1210 in the electronic unit 1204,1206 and 1208.

Turn to Figure 13, the system 1300 that adjusts the power on the reverse link is shown.For example system 1300 can be present within the mobile device.Go out as shown, system 1300 comprises the functional block that can represent by the function of processor, software or its combination (for example, firmware) execution.System 1300 includes the logical groups 1302 of the electronic unit that helps to control forward link transmissions.Logical groups 1302 can comprise electronic unit 1304, is used for sending with maximum realizing the periodicity power headroom measurement result that transmitting power is corresponding.For example, can when moving, equipment carry out periodic measurement in whole coverage.In addition, logical groups 1302 can comprise electronic unit 1206, is used for announcing and one or more corresponding static difference power headroom of focus that are subjected to.For example, as mentioned above, be subjected to focus to comprise inner subband, edge subband and/or single base node.Like this, can periodic measurement result and one or more static difference be divided in the dynamic results added in emitting side, with the power headroom of realizing being calculated that is used for selecting subband.In addition, system 1300 can comprise memory 1308, and this memory 1308 is preserved the instruction that is used for carrying out the function relevant with electronic unit 1304 and 1306.Though electronic unit 1304 and 1306 is shown in memory 1308 outsides, should be appreciated that electronic unit 1304 and 1306 can be present in the memory 1308.

The above comprises the example of one or more embodiment.Certainly, for the purpose of describing previous embodiment, can not describe the combination of each parts that can expect or method, still those of ordinary skill in the art will appreciate that, the many other combination of each embodiment and to rearrange be possible.Therefore, described embodiment is intended to comprise all this replacements, the modifications and variations in the spirit and scope that fall into appended claims.In addition, with regard to " comprising " word that uses in specification or claims, the mode that contains of this word is similar to " comprising " word, just explains as link word in the claims as " comprising " word.

Claims (48)

1. method that is used for alleviating the nonlinear distortion of spectral mask surplus comprises:

Based on the power amplifier balance information from first group of mobile device, at the described first group of mobile device of inside subband scheduling of frequency spectrum distribution, wherein said first group of mobile device comprises at least one mobile device with Power Limitation; And

Based on the power amplifier balance information from follow-up one group of mobile device, after having dispatched described inner subband, the described described follow-up one group of mobile device of remainder scheduling that distributes frequency spectrum, wherein said follow-up one group of mobile device comprises at least one mobile device with Power Limitation

Wherein, the described power amplifier balance information maximum that relates to mobile device can realize emission and/or received power.

2. the method for claim 1 further comprises:

From one or more mobile device received power amplifier balance informations.

3. the method for claim 1, wherein described power amplifier balance information comprises:

The periodicity maximal received power measurement result relevant with bandwidth allocation.

4. method as claimed in claim 3, wherein, described power amplifier balance information also comprises:

The static difference measurement result of the power amplifier surplus of announcing relevant with described inner subband, edge subband or single base node.

5. method as claimed in claim 4 also comprises:

By with the one or more and corresponding static difference measurement result addition of announcing in the described periodicity maximal received power measurement result, come rated output amplifier surplus measurement result, described power amplifier balance information comprises described power amplifier surplus measurement result.

6. the method for claim 1, wherein described first group of mobile device comprises:

With the equipment of launching near the transmitting power of maximum transmission power.

7. the method for claim 1, wherein described follow-up one group of mobile device comprises:

The equipment of launching with the transmitting power that is significantly less than maximum transmission power.

8. radio communication device that is used for alleviating the nonlinear distortion of spectral mask surplus comprises:

Subband selector (406) is used for based on selecting subband to the Power Limitation indication of mobile device with across the consideration of the channel selectivity of subband;

Subband scheduler (408) is used for the mobile device that the described radio communication device of scheduling is served, wherein:

Dispatch at least one mobile device with Power Limitation at the inside of frequency spectrum subband, and

Remainder at described frequency spectrum is dispatched at least one mobile device that does not have Power Limitation, and described Power Limitation relates to the power amplifier balance information; And

Wherein, the described power amplifier balance information maximum that relates to mobile device can realize emission and/or received power.

9. radio communication device as claimed in claim 8, described radio communication device is from described at least one mobile device received power amplifier balance information.

10. radio communication device as claimed in claim 8, wherein, described power amplifier balance information comprises:

The periodicity maximal received power measurement result relevant with bandwidth allocation.

11. radio communication device as claimed in claim 10, wherein, described power amplifier balance information also comprises:

The static difference measurement result of the power amplifier surplus relevant with inner subband, edge subband or single base node.

12. radio communication device as claimed in claim 11, wherein, described radio communication device is by with the one or more and corresponding static difference measurement result addition of announcing in the described periodicity maximal received power measurement result, come rated output amplifier surplus measurement result, described power amplifier balance information comprises described power amplifier surplus measurement result.

13. radio communication device as claimed in claim 8, wherein, described at least one mobile device with Power Limitation is launched with the transmitting power near maximum transmission power.

14. radio communication device as claimed in claim 8, wherein, described at least one mobile device that does not have Power Limitation is launched with the transmitting power that is significantly less than maximum transmission power.

15. a radio communication device that is used for realizing dynamic power amplifier rollback comprises:

Be used for selecting based on the power amplifier balance information at least in part the module of subband;

Be used at least in part based on the inside subband module of dispatching described first group mobile device of the power amplifier balance information that comes from first group of mobile device at frequency spectrum distribution, described first group of mobile device comprises at least one mobile device with Power Limitation; And

Be used at least in part the module of dispatching described follow-up one group of mobile device at the described remainder that distributes frequency spectrum based on the power amplifier balance information that comes from follow-up one group of mobile device, described follow-up one group of mobile device comprises at least one mobile device with Power Limitation; And

Wherein, the described power amplifier balance information maximum that relates to mobile device can realize emission and/or received power.

16. radio communication device as claimed in claim 15 also comprises: the module that is used for receiving from one or more mobile devices described power amplifier balance information.

17. radio communication device as claimed in claim 15, wherein, described power amplifier balance information comprises:

The periodicity maximal received power measurement result relevant with bandwidth allocation.

18. radio communication device as claimed in claim 17, wherein, described power amplifier balance information also comprises:

The static difference measurement result of the power amplifier surplus of announcing relevant with described inner subband, edge subband or single base node.

19. radio communication device as claimed in claim 18 also comprises:

Be used for by the module with the one or more and corresponding static difference measurement result phase Calais rated output amplifier surplus measurement result of announcing of described periodicity maximal received power measurement result, described power amplifier balance information comprises described power amplifier surplus measurement result.

20. radio communication device as claimed in claim 15, wherein, described first group of mobile device comprises:

With the equipment of launching near the transmitting power of maximum transmission power.

21. radio communication device as claimed in claim 15, wherein, described follow-up one group of mobile device comprises:

The equipment of launching with the transmitting power that is significantly less than maximum transmission power.

22. a wireless communications method that is used for realizing dynamic power amplifier rollback comprises:

Select subband based on the power amplifier balance information at least in part;

Based on the inside subband scheduling described first group mobile device of the power amplifier balance information that comes from first group of mobile device at frequency spectrum distribution, described first group of mobile device comprises at least one mobile device with Power Limitation at least in part; And

Dispatch described follow-up one group of mobile device based on the power amplifier balance information that comes from follow-up one group of mobile device at the described remainder of frequency spectrum that distributes at least in part, described follow-up one group of mobile device comprises at least one mobile device with Power Limitation; And

Wherein, the described power amplifier balance information maximum that relates to mobile device can realize emission and/or received power.

23. wireless communications method as claimed in claim 22 also comprises: receive described power amplifier balance information from one or more mobile devices.

24. wireless communications method as claimed in claim 22, wherein, described power amplifier balance information comprises:

The periodicity maximal received power measurement result relevant with bandwidth allocation.

25. wireless communications method as claimed in claim 24, wherein, described power amplifier balance information also comprises:

The static difference measurement result of the power amplifier surplus of announcing relevant with described inner subband, edge subband or single base node.

26. wireless communications method as claimed in claim 25 also comprises:

By with the one or more and corresponding static difference measurement result phase Calais rated output amplifier surplus measurement result of announcing in the described periodicity maximal received power measurement result, described power amplifier balance information comprises described power amplifier surplus measurement result.

27. wireless communications method as claimed in claim 22, wherein, described first group of mobile device comprises:

With the equipment of launching near the transmitting power of maximum transmission power.

28. wireless communications method as claimed in claim 22, wherein, described follow-up one group of mobile device comprises:

The equipment of launching with the transmitting power that is significantly less than maximum transmission power.

29. a method that helps dynamically to adjust the power amplifier rollback comprises:

Send with maximum and can realize the periodicity power headroom measurement result that transmitting power is corresponding;

Announce and one or more corresponding static difference power headroom of focus that are subjected to; And

Receive allocation of subbands, wherein, based on from the power amplifier balance information of the mobile device with Power Limitation described mobile device with Power Limitation of inside subband scheduling at frequency spectrum distribution, and dispatch the described mobile device that does not have Power Limitation based on the power amplifier balance information from the mobile device that does not have Power Limitation at the described remainder of frequency spectrum that distributes, wherein, described power amplifier balance information comprises described periodicity power headroom measurement result and described static difference power headroom.

30. method as claimed in claim 29, the described focus that is subjected to comprises: inner subband, edge subband and/or single base node.

31. method as claimed in claim 29 also comprises:

At least in part based on received allocation of subbands estimating power amplifier rollback; With

Adjust power amplifier according to estimated rollback.

32. method as claimed in claim 31, wherein, estimating power amplifier rollback comprises:

When the branch timing of inside subband of described allocation of subbands indication to frequency spectrum distributes, definite rollback that hangs down.

33. method as claimed in claim 31, wherein, estimating power amplifier rollback comprises:

When the branch timing of edge subband of described allocation of subbands indication to frequency spectrum distribution, determine high rollback.

34. a device that helps dynamically to adjust the power amplifier rollback comprises:

Be used for sending and the maximum module that can realize the periodicity power headroom measurement result that transmitting power is corresponding;

Be used for announcing and one or more modules that are subjected to the corresponding static difference power headroom of focus; And

Be used for receiving the module of allocation of subbands, wherein, based on from the power amplifier balance information of the mobile device with Power Limitation described mobile device with Power Limitation of inside subband scheduling at frequency spectrum distribution, and dispatch the described mobile device that does not have Power Limitation based on the power amplifier balance information from the mobile device that does not have Power Limitation at the described remainder of frequency spectrum that distributes, wherein, described power amplifier balance information comprises described periodicity power headroom measurement result and described static difference power headroom.

35. device as claimed in claim 34 also comprises:

Be used at least in part the module based on received allocation of subbands estimating power amplifier rollback; And

Be used for adjusting based on estimated rollback the module of power amplifier.

36. device as claimed in claim 34, wherein, the described focus that is subjected to comprises:

Inner subband, edge subband and/or single base node.

37. the radio communication device for the nonlinear distortion that alleviates the spectral mask surplus comprises:

Be used for sending the module that can realize the periodicity power headroom measurement result that transmitting power is corresponding with the maximum that is used for bandwidth allocation;

Be used for announcing and one or more modules that are subjected to the corresponding static difference power headroom of focus; With

Be used for receiving the module of allocation of subbands, wherein, based on from the power amplifier balance information of the mobile device with Power Limitation described mobile device with Power Limitation of inside subband scheduling at frequency spectrum distribution, and dispatch the described mobile device that does not have Power Limitation based on the power amplifier balance information from the mobile device that does not have Power Limitation at the described remainder of frequency spectrum that distributes, wherein, described power amplifier balance information comprises described periodicity power headroom measurement result and described static difference power headroom.

38. radio communication device as claimed in claim 37 also comprises:

The module that is used for transmission power limit information.

39. radio communication device as claimed in claim 37, wherein, the described focus that is subjected to comprises:

Inner subband, edge subband and/or single base node.

40. radio communication device as claimed in claim 37 also comprises:

Be used for determining based on received allocation of subbands at least in part the module of power amplifier rollback; With

Be used for adjusting according to determined rollback the module of power amplifier.

41. radio communication device as claimed in claim 40 wherein, is used for determining that the module of power amplifier rollback comprises:

Be used for when the branch timing of inside subband of described allocation of subbands indication to frequency spectrum distributes, definite module of hanging down rollback.

42. radio communication device as claimed in claim 40 wherein, is used for determining that the module of power amplifier rollback comprises:

Be used for determining the module of high rollback when the branch timing of edge subband of described allocation of subbands indication to frequency spectrum distribution.

43. the wireless communications method for the nonlinear distortion that alleviates the spectral mask surplus comprises:

Send with the maximum that is used for bandwidth allocation and can realize the periodicity power headroom measurement result that transmitting power is corresponding;

Announce and one or more corresponding static difference power headroom of focus that are subjected to; And

Receive allocation of subbands, wherein, based on from the power amplifier balance information of the mobile device with Power Limitation described mobile device with Power Limitation of inside subband scheduling at frequency spectrum distribution, and dispatch the described mobile device that does not have Power Limitation based on the power amplifier balance information from the mobile device that does not have Power Limitation at the described remainder of frequency spectrum that distributes, wherein, described power amplifier balance information comprises described periodicity power headroom measurement result and described static difference power headroom.

44. wireless communications method as claimed in claim 43 also comprises:

Transmission power limit information.

45. wireless communications method as claimed in claim 43, wherein, the described focus that is subjected to comprises:

Inner subband, edge subband and/or single base node.

46. wireless communications method as claimed in claim 43 also comprises:

Determine the power amplifier rollback based on received allocation of subbands at least in part; And

Adjust power amplifier according to determined rollback.

47. wireless communications method as claimed in claim 46 wherein, determines that the power amplifier rollback comprises:

When the branch timing of inside subband of described allocation of subbands indication to frequency spectrum distributes, definite rollback that hangs down.

48. wireless communications method as claimed in claim 46 wherein, determines that the power amplifier rollback comprises:

When the branch timing of edge subband of described allocation of subbands indication to frequency spectrum distribution, determine high rollback.

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