CN101668316B - Extended acknowledgement and rate control channel - Google PatentsExtended acknowledgement and rate control channel Download PDF
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- CN101668316B CN101668316B CN200910178280.4A CN200910178280A CN101668316B CN 101668316 B CN101668316 B CN 101668316B CN 200910178280 A CN200910178280 A CN 200910178280A CN 101668316 B CN101668316 B CN 101668316B
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- travelling carriage
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This case is that application number is 2004800266245, and the applying date is on August 4th, 2004, and exercise question is the division of the application of " extended acknowledgement and rate control channel ".
The application relates in general to radio communication, more specifically relates to and confirming and rate control channel.
Wireless communication system is widely used in providing various communication, such as voice-and-data.Typical radio data system or network make a plurality of users can access one or more shared resources.System can be with using multiple multiple access technology, such as frequency division multiplexing (FDM), time division multiplexing (TDM), code division multiplexing (CDM) and other technology.
Example wireless network comprises honeycomb fashion data system.Below several such examples: (1) " mobile radio station-base station compatibility standard TIA/EIA-95-B of dual mode wideband spread spectrum cellular " (IS-95 standard) (2) by " third generation partner program " (3GPP) mechanism provide, and be included in and comprised 3G TS 25.211, 3G TS 25.212, standard (W-CDMA standard) in one group of file of 3G TS 25.213 and 3G TS25.214 file, (3) by " third generation partner program 2 " (3GPP2) mechanism provide, and be included in the standard (IS-2000 standard) of " the physical layer standard TR-45.5 of cdma2000 spread spectrum system ", (4) meet high data rate (HDR) system of TIA/EIA/IS-856 standard (IS-856 standard), (5) the revised edition C of IS-2000 standard, comprise C.S0001C-C.S0006.C, and associated documents (comprising that revised edition D afterwards submits to) are called as 1xEV-DV suggestion.
In example system, the revised edition D of IS-2000 standard (at present just under study for action), the transmitting of travelling carriage on reverse link controlled by base station.Base station can determine the maximum rate or the business-pilot tone ratio (TPR) that allow travelling carriage to send.Current suggestion be two kinds of controlling mechanisms: the controlling mechanism based on permitting and the controlling mechanism of controlling based on speed.
In the control based on permitting, travelling carriage to base station feedback about the transmitting capacity of travelling carriage, the information of the size of data buffer and service quality (QoS) level etc.Base station monitoring is from the feedback of a plurality of base stations and determine the corresponding maximum rate that allows which travelling carriage to send and allow each travelling carriage.These determine to send travelling carriage to by permitting message.
In the control of controlling based on speed, base station is with restricted range regulation travelling carriage speed (that is, speed increases, a unchanged and speed declines).Adjusting command is by being used simple binary rate control bit or many-valued designator to be sent to travelling carriage.
At travelling carriage, have under the situation of full buffer (full buffer) of mass data, technology and rate control techniques based on permitting are carried out roughly the same operation.Disregard overhead issues, in the situation that actual discharge model allowance method may can be controlled travelling carriage better.Disregard overhead issues, allowance method may be able to be controlled different QoS stream better.The speed of two types is controlled and can be distinguished, and it comprises the special-purpose method of rate control to each travelling carriage individual bit, and every sector is used the public speed of individual bit to control.The various various combinations of these two kinds of methods may be that a speed control bit is distributed to a plurality of travelling carriages.Common rate control method may need less expense.But, when it is compared with more special-purpose control program, can provide the less control to travelling carriage.At any one, constantly when the number of mobile stations sending reduces, common rate control method can become more similar each other with special-purpose speed control.
Technology based on permitting can promptly change the emission rate of travelling carriage.If yet exist continuous speed to change, only the technology based on permitting may suffer the worries of high expense.Similarly, pure rate control techniques can stand upward period and that equate or higher expense slowly during upward period (ramp-up times).
These two kinds of methods all can not only provide the expense reducing but also provide more greatly or speed adjustment fast.The example of the method that can meet the need is what on February 17th, 2004 submitted to, the XX/XXX that is entitled as " combination is permitted, confirmed and speed control command ", open in the U.S. Patent application of XXX (acting on behalf of document No. 030525), this patent has been transferred to assignee of the present invention.
In addition,, when also wishing to maintain gratifying error probability at the related command on control channel, reduce the number of control channel.In this area, have the demand to following system, this system provides the ability of the speed (or the resource of corresponding travelling carriage is distributed) of controlling each travelling carriage and travelling carriage group, and can locally increase channel count.In addition, also need to adapt to the error probability that order was controlled or confirmed to different rates.Therefore, in this area, exist reducing the confirmation of overhead control, transmitting and regulating where necessary the needs of the ability of emission rate.
Summary of the invention
Embodiment disclosed herein has solved the demand to extended acknowledgement/rate control channel in this area.In one embodiment, confirm that order and speed control command are combined to generate compound command.In another embodiment, according to the constellation generation compound command of a plurality of points, wherein each point is corresponding with a pair of order being comprised of speed control command and confirmation order.Still in another embodiment, each point of this constellation is designed to as order is separately to providing the error probability of expectation.Still in another embodiment, public speed control command sends together with combination or special-purpose speed control command.Other various different embodiments have also been proposed.These embodiments have advantages of that the expense of reducing provides confirmation and speed to control to single distant station and/or distant station group simultaneously.
Accompanying drawing explanation
Fig. 1 is the fundamental block diagram that can support a plurality of users' wireless communication system;
Fig. 2 has explained exemplary travelling carriage and the base station configuring in being applicable to the system of data communication;
Fig. 3 is the block diagram such as the such Wireless Telecom Equipment of travelling carriage or base station;
Fig. 4 has illustrated the data of data wireless links communication and the exemplary embodiment of control signal;
Fig. 5 is exemplary acknowledgement channel;
Fig. 6 is exemplary rate control channel;
Fig. 7 be in base station, adopt for responding from the request of and a plurality of travelling carriages and the illustrative methods of transmitting partition capacity;
Fig. 8 is the illustrative methods that generates allowance, confirmation and speed control command;
Fig. 9 is that base station is for monitoring and respond the illustrative methods of allowance, confirmation and speed control command;
Figure 10 has illustrated the timing to the exemplary embodiment of the confirmation with combination and control channel;
Figure 11 has illustrated the confirmation with combination and rate control channel together with the timing of the exemplary embodiment of new allowance;
Figure 12 has illustrated the confirmation with combination and rate control channel but there is no the timing of exemplary embodiment of allowance;
Figure 13 has illustrated the exemplary embodiment of the system that comprises special-purpose speed control signal and public speed control signal;
Figure 14 has illustrated the embodiment of the system that comprises forward direction expansion acknowledgement channel;
Figure 15 has illustrated and has been adapted at expanding the exemplary constellation of applying in acknowledgement channel;
Figure 16 has illustrated and has been adapted at expanding the alternative constellation of applying in acknowledgement channel;
Figure 17 has illustrated and has been adapted at expanding the exemplary constellation of the three-dimensional of applying in acknowledgement channel;
Figure 18 has illustrated the embodiment for the treatment of the method that comprises the transmitting that confirmation and speed are controlled receiving;
Figure 19 has illustrated for responding the embodiment of the method for public and special-purpose speed control;
Figure 20 has illustrated the alternate embodiments for the treatment of the method that comprises the transmitting that confirmation and speed are controlled receiving; And
Figure 21 has illustrated for receiving and respond the method for forward direction expansion acknowledgement channel.
The exemplary embodiment of below describing in detail provides the distribution to shared resource, this shared resource is such shared resource of sharing such as the one or more travelling carriages in communication system, and this distribution is to realize by one or more data rates of advantageously controlling or adjustment is relevant from the different acknowledge message of communicating by letter in system.
Disclosed herein is the combination of the scheduling for the scheduling based on permitting being provided and controlling based on speed, and for being used in combination the technology of grant channel, acknowledgement channel and rate control channel.Different embodiment can be convenient to realize one or more following benefits: the emission rate of the travelling carriage that increases sharply, make rapidly travelling carriage stop sending, adjustment to the low expense of travelling carriage speed, the travelling carriage transmitting acknowledgement of low expense, the all operations were of low expense, and the service quality of the data flow from one or more travelling carriages (QoS) is controlled.
By using for the constellation of the right point of each different command, rate control channel and acknowledgement channel are combined and be convenient to the minimizing of control channel.In addition, constellation can be formed for the error probability of expectation is provided for each related command.Can adopt on the side of public speed control signal special-purpose speed control signal.By utilizing one or more special-purpose rate control channels and one or more public rate control channel, be convenient to single mobile station carry out specific speed control and there is the travelling carriage group that control is larger and reduce the ability of expense.Below will describe other various benefits in detail.
One or more exemplary embodiment described herein is to be explained in the background of digital radio data communication system.Although it is favourable using in this background, different embodiments of the invention can be incorporated in different environment or configuration.Conventionally, various system described herein can form by the processor with software control, integrated circuit or discrete logic.The data that the application mentions in the whole text, instruction, order, information, signal, symbol and chip are advantageously represented by voltage, circuit, electromagnetic wave, magnetic field or particle, light field or particle or above combination.In addition the functional block showing in each block diagram, can be represented by hardware or method step.
More specifically, each embodiment of the present invention can be incorporated in the wireless communication system that communication standard open according to various various criterions and general introduction operates, and wherein these various various criterions are by telecommunications industry association (TIA) and the announcement of other normal structure.Such standard comprises TIA/EIA-95 standard, TIA/EIA-IS-2000 standard, IMT-2000 standard, UMTS and WCDMA standard, GSM standard, introduces all these standards herein as a reference.The copy of these standards can be by writing letter to obtain to following address: TIA, and Standards and Technology Department, 2500 Wilson Boulevard, Arlington, VA 22201, United States of America.This standard is identified as UMTS standard conventionally, introduces this standard herein as a reference, and this standard can be by the French Valbonne of contact, and the 3GPP of 650 Route des Lucioles-Sophia Antipolis supports that office obtains.
Fig. 1 is the figure that can be designed to support the wireless communication system 100 of one or more CDMA standards and/or design (for example, W-CDMA standard, IS-95 standard, cdma2000 standard, HDR standard, 1xEV-DV system).In optional embodiment, system 100 can additionally be supported wireless standard or the design beyond any cdma system.In the exemplary embodiment, system 100 is 1xEV-DV systems.
For brevity, in figure, only show system 100 and comprise three base stations 104 of communicating by letter with two travelling carriages 106.Base station and its area of coverage are called " community " conventionally by integral body.In IS-95, cdma2000 or 1xEV-DV system, for example, community can comprise one or more sectors.In W-CDMA standard, the area of coverage of each He Gai sector, sector of base station is called as community.As used herein, term base station can exchange and use with term access point or Node B.Term travelling carriage can be with terms user equipment (UE), subscriber unit, subscriber station, access terminal, remote terminal or other corresponding term known in the art exchange and use.Term travelling carriage has comprised fixing wireless application.
Depend on the cdma system being just implemented, each travelling carriage 106 can be communicated by letter with (or may be an a plurality of) base station 104 on the forward link at any given time, and can be according to travelling carriage whether in soft handover and on reverse link with one or more base station communications.Forward link (that is, down link) refers to the transmitting from base station to travelling carriage, and reverse link (that is, up link) refers to the transmitting from travelling carriage to base station.
Although different embodiment described herein is intended to be provided for supporting reverse link or the forward link signal of reverse link transmissions, and some embodiment may be applicable to the characteristic of reverse link transmissions very much, but person of skill in the art will appreciate that: travelling carriage and base station can be equipped to for such transmitting data as described here, and each embodiment of the present invention also can be applied in those situations.Word " exemplary " only represents " illustration or an illustration as an example, " herein.The unnecessary embodiment being described to herein arbitrarily " exemplary " is interpreted as than other embodiment more preferably or more useful.
the transmitting of 1xEV-DV forward link data
Such as the system of describing in 1xEV-DV suggestion, system 100 generally includes four class forward link channels: the IS-95 of overhead channel, dynamic change and IS-2000 channel, forward packet data channel (F-PDCH) and some alternate channels.The distribution of overhead channel changes very slow; For example, they can not change for several months.Typically, they are just changed when there is the change of master network configuration.The IS-95 of dynamic change and IS-2000 channel are assigned with on the basis of per call, or are used to voice and the Packet Service of IS-95 or IS-2000 version 0-B.Typically, after the channel of overhead channel and dynamic change has been assigned, remaining available base station power is assigned to F-PDCH, for remaining data service.
The F-PDCH similar to Traffic Channel in IS-856 standard is used to the flank speed that can support, to the one or more users in each community, send data at every turn.In IS-856, when to travelling carriage transmitting data, the whole power of base station and the whole space of walsh function are available.Yet in 1xEV-DV system, the some of them of some base station powers and walsh function are assigned to overhead channel and existing IS-95 and cdma2000 business.The data rate that can support depends primarily on available power and walsh code after the power for overhead channel, IS-95 and IS-2000 channel and walsh code have been assigned with.By using one or more walsh code, the upper data that send of F-PDCH are expanded.
In 1xEV-DV system, launch to a travelling carriage conventionally at every turn on F-PDCH base station, although some users may use the Packet Service in community.(also can, by being two user's scheduled transmission and being suitably each user assignment power and Walsh channel, come to send to two users.) based on some dispatching algorithms, be that travelling carriage is selected in forward link transmitting.
In being similar to the system of IS-856 or 1xEV-DV, scheduling is to be based in part on from the channel-quality feedback at serviced travelling carriage just to carry out.For example, in IS-856, travelling carriage is estimated the quality of forward link and calculated expection can be the emission rate keeping when precondition.Speed from the expectation of each travelling carriage is launched into base station.Dispatching algorithm can, for example, select to support the travelling carriage of the transmitting of relatively high emission rate, to more effectively use shared communication channel.As another example, in 1xEV-DV system, the estimation that each travelling carriage is above launched Carrier interference ratio (C/I) at reverse link circuit quality indicating channel (R-CQICH) is as channel quality estimation.Dispatching algorithm is used to be identified for the travelling carriage of transmitting, and determines suitable speed and transmitting form according to channel quality.
As mentioned above, wireless communication system 100 can be supported the user of a plurality of while shared communication resources, such such as IS-95 system, can once in a while whole system resource be distributed to a user, such such as IS-856 system, or can share system resource to allow this access of two types.1xEV-DV system is partition system resources require the dynamically example of the system of allocation proportion according to user between two types of accesses.Exemplary forward link embodiment has just been described.To the embodiment of different exemplary reverse links be described in more detail below.
Fig. 2 has illustrated example travelling carriage 106 and the base station 104 of configuration in the system 100 that is suitable for data communication.Base station 104 and travelling carriage 106 are displayed on forward direction and reverse link and communicate.Travelling carriage 106 receives forward link signal in receiving subsystem 220.By what describe in detail, the base station 104 of transmitting forward data and control channel can be called as the information desk of travelling carriage 106 herein below.Hereinafter with reference to Fig. 3, further describe the receiving subsystem of example.In travelling carriage 106, to receive forward link signal from serving BS, make the estimation of carrier wave and interference ratio (C/I).C/I measurement is the example that is used as the channel quality measures of channel estimating, and alternative channel quality measures can adopt in optional embodiment.C/I measurement is sent to the transmitting subsystem 210 in base station 104, and the example will be described in further details below with reference to Fig. 3.
Transmitting subsystem 210 transmits C/I by reverse link to be estimated, on this reverse link, C/I estimates to be sent to serving BS.Note, in the situation of soft handover known in the art, from the reverse link signal of travelling carriage transmitting, can be received with base stations a plurality of and non-serving base stations by one, at this, these base stations are called to non-serving base stations.The C/I information that receiving subsystem 230 in base station 104 receives from travelling carriage 106.
How scheduler in base station 104 (scheduler) 240 should and send to and a plurality of travelling carriages in the area of coverage of Serving cell data for determining whether.Can adopt the dispatching algorithm of any type within the scope of the invention.An example is open in the U.S. Patent number 08/798,951 that is entitled as " method and apparatus of forward link rate scheduling " of submitting on February 11st, 1997, and this patent is transferred to applicant of the present invention.
In the 1xEV-DV of example embodiment, when the C/I measurement designation data receiving from certain travelling carriage can be sent out with given pace, be that travelling carriage is selected in forward link transmitting.With regard to power system capacity, the target MS that selection can make shared communication resource always be utilized with its maximum supported speed is useful.Like this, typically selected target MS can be the travelling carriage with the C/I of maximum report.Other factors also be directed in scheduling decision.For example, may to different user, make the minimum mass of service guarantees.Can be that the travelling carriage with the C/I of relatively low report is selected to transmitting, to be maintained to that user's minimum data transfer rate.Can be that the travelling carriage without the C/I of maximum report is selected to transmitting, to maintain certain fairness criteria in the middle of all users.
In the 1xEV-DV of example system, scheduler 240 is launched and is determined which travelling carriage sends and data rate, modulation format and power level for that.In optional embodiment, in IS-856 system, for example, supported speed/modulation format determines to make by the channel quality based on the measurement of travelling carriage place at travelling carriage place, and transmission form can be sent to the serving BS in C/I measurement place.Person of skill in the art will appreciate that, can adopt within the scope of the invention to can supporting rate, the multiple combination of modulation format, power water equality.In addition, although herein in described different embodiment, scheduler task is carried out in base station, in optional embodiment, and the some parts of dispatch deal and all can carrying out at travelling carriage.
Scheduler 240 direct emissions subsystems 250 are used selected speed, modulation format, power water equality to selected travelling carriage, to send on the forward link.
In the exemplary embodiment, the message on control channel or F-PDCCH sends with together with data on data channel or F-PDCH.Control channel can be used to identify the reception of travelling carriage to the data on F-PDCH, can also identification communication session during other useful messaging parameter.Travelling carriage should receive and demodulate the data from F-PDCH when F-PDCCH indicates this travelling carriage to be the target of launching.Travelling carriage, after receiving such data, utilizes success or the failure of indication transmitting on reverse link, to make response.Retransmission technique known in the art is widely used in data communication system.
Travelling carriage can with more than one base station communication, a kind of known situation is soft handover.Soft handover can comprise a plurality of sectors an of base station (or base transceiver subsystem (BTS)), is known as More Soft Handoff (softer handoff), and the sector of a plurality of base stations.Base station section in soft handover is stored in the active set of travelling carriage conventionally.In the system of simultaneously being shared at the communication resource, such as IS-95, IS-2000, or in the corresponding part of 1xEV-DV system, travelling carriage can combine the forward link signal sending from all sectors of active set.In the clear data such such as IS-856 (data-only) system, or in the appropriate section of 1xEV-DV system, travelling carriage receives from a base station in active set, the forward link signal of serving BS (determining according to the such mobile station in selecting algorithm of the algorithm described in C.S0002.C standard).Below other forward link signal describing in further detail also can be received from non-serving base stations.
Reverse link signal from travelling carriage can receive at place, a plurality of base station, and is generally the quality of the base station maintain reverse link in active set.The reverse link signal receiving at place, a plurality of base station can be combined.Conventionally, soft combination is from the reverse link signal of different base station, position by the sizable network service bandwidth of needs and very little delay, and therefore example system listed above is not supported this combination.In More Soft Handoff, the reverse link signal that the place, a plurality of sector in single BTS receives can be combined, and without network signal.Although can adopt within the scope of the invention the reverse link signal combination of any type, but in above-mentioned example system, power of reverse link is controlled and is maintained quality so that reverse link frame can be located to be successfully decoded at a BTS (switched diversity switching diversity).
Reverse link data transmitting also can be carried out in system 100.The reception of describing and transmitting subsystem 210-230 and 250 can be used to transmit control signal on the forward link, to guide the data transmission on reverse link.Travelling carriage 106 also can send control information on reverse link.(each travelling carriage 106 of communicating by letter with one or more base stations 104 can access the shared communication resource, reverse chain channel, it can be distributed as in 1xEV-DV changeably, or can be fixed and distribute as in IS-856), to adapt to various access controls and rate control techniques, the example will be explained in detail following.Scheduler 240 can be used to determine the distribution of reverse link resources.Below by the controling and data signal Reverse link data communication of detailed description exemplary.
the embodiment of exemplary base and travelling carriage
Fig. 3 is the block diagram such as the such Wireless Telecom Equipment of travelling carriage 106 or base station 104.The functional block illustrating in this exemplary embodiment will be included in the subset of each element in base station 104 or travelling carriage 106 conventionally.Those skilled in the art will be transformed into the embodiment shown in Fig. 3 in the base station or travelling carriage configuration that is suitable for arbitrary number at an easy rate.
Signal is received and is delivered to receiver 320 at antenna 310 places.Receiver 320 is according to carrying out and process such as one or more wireless system standards of standard listed above.Receiver 320 is carried out various processing, such as radio frequency (RF) to the conversion of base band, amplification, analog-to-digital conversion, filtering etc.Known in the art have a various technology for receiving.Although show independent channel quality estimators 335 for the purpose of the clarity illustrating, when equipment is respectively travelling carriage or base station, receiver 320 can be respectively used to measure the channel quality of forward direction or reverse link, below will describe this situation in detail.
In demodulator 325 according to one or more communication standards by the signal demodulation from receiver 320.In the exemplary embodiment, adopted can demodulation 1xEV-DV signal demodulator.In optional embodiment, optional standard can be supported, and embodiment can support multiple communication format.Demodulator 330 can carry out RAKE receive, balanced, combine, deinterleave, decode and receive other various functions of the call format of signal.Various demodulation techniques are well known in the art.104 places in base station, demodulator 325 will be according to reverse link demodulation.And at travelling carriage 106 places, demodulator 325 will be according to forward link demodulation.Data described herein and control channel are all can in receiver 320 and demodulator 325, be received and the example of the channel of demodulation.As mentioned above, the signaling according on control channel is carried out in the demodulation of forward data channel (FDC).
The data that message decoder 330 receives through demodulation, and on forward direction or reverse link, extract respectively signal or the message that sends to travelling carriage 106 or base station 104.Message decoder 330 decoding is for setting up, maintain and the various message of the calling (comprising voice or data session) of the system of dismantling.Message can comprise the channel quality indication of measuring such as C/I, power control messages or for the control channel message of demodulation forward data channel (FDC).When sending on reverse or forward link respectively, dissimilar control message can be decoded in base station 104 or travelling carriage 106.For example, described below is request message and the allowance message of launching for dispatching reverse link data producing in travelling carriage or base station respectively.Other various type of messages are known in this area, and may in the various communication standards supporting, be stipulated.These message are passed to processor 350, for using in subsequent treatment.Although what show for the purpose of the clarity of discussing is functional block independently, some or all functions of message decoder 330 can be carried out in processor 350.Optionally, can decode certain information it is directly sent to processor 350 (control such as the such single-bit messages of ACK/NAK or power to increase/reduce order be the example) of demodulator 325.For disclosed embodiment is used herein various message and signal, will further described below.
Channel quality estimators 335 is connected to receiver 320, and is used to make various power levels estimations, and these power levels are estimated the process use of describing herein, and other various processing of using in communication are such as using in demodulation.In travelling carriage 106, can make C/I and measure.In addition to the measurement of the arbitrary signal using in system or channel, can in the channel quality estimators 335 of given embodiment, measure.In base station 104 or travelling carriage 106, can make such as the such signal strength signal intensity of the pilot power receiving and estimating.Be only used to discuss clear for the purpose of, channel quality estimators 335 is just shown as independently functional block.Such functional block is merged to such as being very general in receiver 320 or such another functional block of demodulator 325.According to which signal or which kind of system type, estimated, can make dissimilar signal strength signal intensity and estimate.Conventionally, within the scope of the invention, the channel quality measures of any type (metric) assessment function piece can be used for replacing channel quality estimators 335.As will be further illustrated like that below, in base station 104, channel quality estimation is passed to processor 350, for scheduling, or for definite reverse link circuit quality.Channel quality estimation can be used for determining whether to need increasing (up) power control command still (down) reduce power control command, forward direction or power of reverse link are driven into the set point of expection.The set point of expection can be determined with outer loop (outer loop) power control mechanism.
Signal is launched by antenna 310.The signal of transmitting basis in reflector 370 is formatted such as one or more wireless system standards listed above.The example that can be included in the element in reflector 370 is amplifier, filter, digital-to-analogue (D/A) transducer etc.For the data of launching, by modulator 365, offer reflector 370.Data and control channel can be formatted according to multiple format in order to launch.Can be formatted according to speed and the modulation format of C/I or the indication of other channel quality measurement according to dispatching algorithm at modulator 365 for the data of launching on forward link data channel.Above-described such as the such scheduler of scheduler 240, can reside in processor 350.Similarly, the power level that reflector 370 can be instructed into according to dispatching algorithm is launched.The example that can be integrated into each element in modulator 365 comprises: dissimilar encoder, interleaver, expander and modulator.The reverse link design that applicable 1xEV-DV system is used has below also been described, this reverse link design comprises exemplary modulation format and access control.
As described in this, message builder 360 can be used to prepare various dissimilar message.For example, C/I message can generate in travelling carriage, for the transmitting on reverse link.For the transmitting on forward direction or reverse link, can in base station 104 or travelling carriage 106, generate various dissimilar control messages respectively.What for example, below illustrate is request message and the allowance message of launching for dispatching reverse link data generating in travelling carriage or base station respectively.
That receive and data demodulation in demodulator 325, can be sent to processor 350 to use in voice or data communication, can also be sent to other different element.Similarly, for the data of launching, modulator 365 and reflector 370 can be directed to from processor 350.For example, various market demands can be at processor 350, or another processor (not shown) place in being included in Wireless Telecom Equipment 104 or 106 provides.Base station 104 can be connected to one or more external networks via other unshowned device, such as internet (not shown).Travelling carriage 106 can comprise and being connected to such as the such external equipment of portable computer (not shown).
Processor 350 can be general purpose microprocessor, digital signal processor (DSP) or application specific processor.Processor 350 can be carried out the part or all of function of receiver 320, demodulator 325, message decoder 330, channel quality estimators 335, message builder 360, modulator 365 or reflector 370, and any other processing of Wireless Telecom Equipment needs.Processor 350 can be connected with specialized hardware, to make assistance (not shown details) in some tasks.Data or voice application can be outside, the portable computer connecting such as outside or with being connected of network, can on the Attached Processor (not shown) in Wireless Telecom Equipment 104 or 106, move, or can be at processor 350 from operation with it.Processor 350 is connected with memory 355, and this memory 355 can be used in storage data and for carrying out the instruction of various process described herein and method.It will be appreciated by those skilled in the art that memory 355 can comprise one and a plurality of various types of memory elements, it can be embedded in processor 350 all or in part.
Typical data communication system can comprise the channel that one or more are dissimilar.More specifically, generally adopt one or more data channels.Although control signal can be comprised on data channel in band, it is also very general that one or more control channels are utilized.For example, in 1xEV-DV system, on the forward link, forward packet data control channel (F-PDCCH) and forward packet data channel (F-PDCH) are defined respectively for emission control and data.The various exemplary channel of reverse link data transmitting will be described in detail below.
the item that the design of 1xEV-DV reverse link is considered
In this part, the various factors of considering has been described when the exemplary embodiment of reverse link of design wireless communication system.In the some of them embodiment further describing at following chapters and sections, signal, parameter and the process relevant with 1xEV-DV standard have been used.The same with each embodiment described herein, this standard is described just to the object of explanation, and within the scope of the invention, the combination of these embodiments can be used in the communication system of arbitrary number.These chapters and sections play the effect that part is summarized each embodiment of the present invention, although it is not exhaustive.Exemplary embodiment will further described in chapters and sections below subsequently, and describe additional embodiment in these chapters and sections.
In some cases, reverse chain-circuit capacity is interference-limited.The service quality (QoS) that base station requires according to various different mobile stations available reverse link communication resources to travelling carriage, thereby to effectively utilize resource, make throughput-maximized.
Maximization comprises several factors to the utilization of reverse link communication resources.The factor that will consider is the mixing from the reverse link being scheduled of various different mobile stations transmittings, and wherein each travelling carriage can stand the channel quality changing at any given time.In order to increase total throughput (summary data of all travelling carriage transmittings in community), when no matter when hope can exist the reverse link data that will send, whole reverse link can all be used.In order to fill up available capacity, travelling carriage can be allowed to access with they supported maximum rates, and additional travelling carriage can be allowed until reach capacity.When base station at which travelling carriage of decision will be dispatched, an admissible factor is, the data bulk that the maximum rate that each travelling carriage can be supported and each travelling carriage will send.Can select to have the travelling carriage of higher throughput, be used for replacing the replaceable travelling carriage of the throughput that channel do not support that this is higher.
Another factor that will consider is the service quality that each travelling carriage requires.Although allow to postpone the access to a travelling carriage because wish channel to improve, and select the better travelling carriage of situation, not that optimal travelling carriage may need to be allowed access to meet minimum quality of service assurance.Like this, the data throughout after scheduling may not be absolute maximum, but considers channel condition, available transmission power of mobile station and the maximum after demand for services.For arbitrary disposition, the signal noise ratio of the mixing that can reduce to select is made us expectation.
Below described various scheduling mechanism, it is for allowing travelling carriage to send data on reverse link.One class reverse link transmissions comprises that travelling carriage in order to launch the request of making on reverse link.Whether base station is made can this request provide determining of resource.Allowance can be made allowing this transmitting.This shaking hands between travelling carriage and base station introduced and postponed before reverse link data can be launched.For some, plant reverse link data, this delay may be acceptable.Other types may be more responsive to postponing, and describe below reverse link transmissions in detail can selecting technology, it is for alleviating delay.
In addition, reverse link resources is consumed for the request of making transmitting, and forward link resources is consumed for this request of response, launches an allowance.When the channel quality of travelling carriage is lower, i.e. low geometry or while decaying rapidly, on the forward link may be relatively high for arriving the required power of travelling carriage.Below describe in detail for reducing reverse link data and launch the number of required request and allowance or the various technology of required transmitting power.
The delay of shaking hands and introducing for fear of request/allowance, and in order to save forward direction and the reverse link resources for supporting that they are required, and support autonomous reverse link transmissions pattern.Travelling carriage can send data with limited speed on reverse link, and need not make request or wait for and permitting.
Can, according to the emission rate of permitting revising or independently (without the expense of permitting) revises the travelling carriage sending, may be also desirable.In order to complete this function, speed control command can be implemented with autonomous scheduling together with scheduling based on request/permit.For example, the Management Information Base order of present rate of transmitting that can comprise increase, reduces and remain unchanged.Such speed control command can be addressable separately to each travelling carriage, or can be addressable to one group of travelling carriage.Below will further describe various exemplary speed control commands, channel and signal.
One or more travelling carriages are distributed to a part of reverse chain-circuit capacity in base station.The travelling carriage that is allowed access is provided to maximum power level.Herein in the exemplary embodiment of explanation, by utilizing service pilot (T/P) ratio to distribute reverse link resources.Because the pilot signal of each travelling carriage is controlled and is adaptively controlled via power, the regulation T/P ratio indication power that transmitting data can be used on reverse link.Specific allowance can be made to one or more travelling carriages in base station, and indication is specific to the T/P value of each travelling carriage.Base station can also be to asking the remaining travelling carriage of access to make public allowance, and indication allows the maximum T/P value of those remaining travelling carriage transmittings.Autonomous and transmitting scheduling, independent controlling and will be described in detail below with public allowance and speed.
Various dispatching algorithm known in the art, and more algorithm will be developed, these algorithms can be used in various specific and public T/P value and conceivable speed control commands because being usually identified for permitting according to some, and wherein these factors comprise: the number of the possibility of the number of the travelling carriage of registration, travelling carriage autonomous transmission, the request of not yet replying and size, expection to the average response of permitting and any individual other factors.In an example, based on service quality (QoS) priority, efficiency with from the obtainable throughput of the set of the travelling carriage of asking, make one's options.The U.S. Patent number 10/651 of the pending trial that is entitled as " SYSTEM ANDMETHOD FOR A TIME-SCALABLE PRIORITY-BASED SCHEDULER " (" for the system and method for the scalable scheduler based on priority of time ") of submitting on August 28th, 2003, in 810, disclose a kind of exemplary dispatching technique, this patent is transferred to the assignee of this patent.Additional reference comprises the U.S. Patent number 5 that is entitled as " METHOD AND APPARATUS FORREVERSE LINK RATE SCHEDULING " (" for the method and apparatus of reverse link rate scheduling "), 914,950, it is also the U.S. Patent number 5 of " METHOD ANDAPPARATUS FOR REVERSE LINK RATE SCHEDULING " (" for the method and apparatus of reverse link rate scheduling ") with exercise question, 923,650, these two patents are all transferred to the assignee of this patent.
Travelling carriage can send by one or more subgroups the grouping of data, wherein each subgroup comprises whole grouping information (each subgroup is unnecessary is encoded by identical, because various coding or redundancy can be used in each subgroup).Can utilize retransmission technique to guarantee reliable transmitting, for example arq (ARQ).Like this, if first subgroup by zero defect receive (by using CRC, for example), to travelling carriage, send certainty and confirm (ACK), and additional subgroup (wander back to, each subgroup comprises complete grouping information with a kind of form or another kind of form) will do not sent.If first subgroup is not correctly received, to travelling carriage, sends nack signal (NAK), and will send second subgroup.Base station can be combined the energy of two subgroups and be tried decoding.This processing can be repeated uncertain time, although generally designate the maximum number of subgroup.In the exemplary embodiment of explanation, can send at most four subgroups herein.Like this, because additional subgroup is received, the correct possibility receiving can increase.What below illustrate is that these modes can provide with acceptable level of overhead the flexibility of desired level to emission rate for the variety of way of combination ARQ response, speed control command and allowance.
As just described, determining it is to use autonomous transmission to send data or the higher digit rate of request with low latency transmit and wait for that in public or specific allowance, travelling carriage can be stand-by period trade off throughput.In addition,, for given T/P, travelling carriage can select data rate to adapt to stand-by period or throughput.For example, having the travelling carriage that relatively less bit will send can determine, low latency is desirable.For available T/P (may be autonomous transmission maximum in this example, but may be also specific or public allowance T/P), travelling carriage can be selected such speed and modulation format, so that the possibility of the correct reception in base station the first subgroup is higher.Although can utilize re-transmission where necessary, also may can in a subgroup, send its data bit by this travelling carriage.In the various exemplary embodiments of explanation, each subgroup sends in 5ms herein.Therefore, in this embodiment, travelling carriage can carry out autonomous transmission immediately, and it may be received at place, base station after the interval of 5ms.It should be noted, alternately, travelling carriage can increase by the availability of additional subpackets the data bulk sending for given T/P.So travelling carriage can select autonomous transmission to reduce and ask and permit the relevant stand-by period, and can be specific T/P trade off throughput extraly, to minimize the number (thereby reducing stand-by period) of required subgroup.Even if total object subgroup is selected, for relatively little data, transmit, autonomous transmit also by than request and stand-by period of permitting still less.One of ordinary skill in the art will recognize that, growth along with the data bulk that will send, a plurality of groupings of request transmitting, by being switched to request and allowance pattern, can reduce the whole stand-by period, because the throughput of the increase finally being brought by the higher data rate of a plurality of groupings is offset in the performance loss of request and allowance.By utilizing, can distribute the exemplary collection of associated emission rate and form to further describe this processing with various T/P below.
reverse link data transmitting
A target of reverse link design is, as long as exist reverse link data just will send, the hot noise increase (Rise-over-Thermal) at place, base station (RoT) is kept to relatively constant.Transmitting in reverse-link data channel is controlled with three kinds of different modes:
Autonomous transmission: this situation is for requiring the business of low time delay.Travelling carriage is allowed to be no more than the speed of certain emission rate to be launched immediately, and this emission rate is determined by serving BS (that is that base station that, travelling carriage is sent to its CQI).Serving BS is also referred to as scheduling base station or permits base station.Maximum for autonomous transmission allows emission rate dynamically based on system load, congested etc., to carry out signal notice by serving BS.
Scheduled transmission: travelling carriage sends the estimation to its buffer sizes, available horsepower and other parameters that may exist.Base station determines when and allows travelling carriage transmitting.The target of scheduler is to limit the number of transmitting simultaneously, has so just reduced the interference between travelling carriage.Scheduler can try to make the travelling carriage in the region between community to launch to reduce the interference to neighbor cell with lower speed; and try closely to control RoT with the DV feedback on voice quality, confirmation (R-ACKCH) and R-CQICH on protection R-FCH, and the stability of system.
Speed is controlled transmitting: no matter travelling carriage be scheduled (that is, being allowed ground) transmitting or autonomous transmission, base station can through-rate control command regulate emission rate.Exemplary speed control command comprises increase, reduces or keeps present rate.Can comprise additional order, be used for stipulating how to realize speed and change (that is the quantity that, increases or reduce).Speed control command can be randomness or deterministic.
Each embodiment described here has comprised one or more features that are designed to throughput, capacity and the whole system performance of the reverse link that improves wireless communication system.Just to illustrative object, the data division in 1xEV-DV system has been described, particularly the optimization to the transmitting of each travelling carriage on enhancement mode reverse complemental channel (R-ESCH).In these chapters and sections, describe the various forward directions and the reverse chain channel that in one or more exemplary embodiments, use in detail.The subset of the channel that these channels are normally used in communication system.
Fig. 4 has illustrated for the data of Reverse link data communication and the exemplary embodiment of control signal.Travelling carriage 106 is shown to be communicated by various channels, and each channel is connected to one or more base station 104A-104C.Base station 104A is marked as scheduling base station.Other base station 104B and 104C are parts for the active set of travelling carriage 106.Show the reverse link signal of Four types and the forward link signal of Four types.They will be described below.
Reverse request channel (R-REQCH) is moved platform for the reverse link transmissions to scheduling base station requests data.In the exemplary embodiment, these requests are the requests (will be described in further details below) to launching on R-ESCH.In the exemplary embodiment, the request on R-REQCH comprise T/P ratio that travelling carriage can support, according to variable and the buffer sizes (that is, waiting the quantity of armed data) of the channel condition changing.This request can be for waiting for the data specified services quality (QoS) of transmitting.Be noted that travelling carriage can have the single QoS level for travelling carriage appointment, or alternatively, be the different QoS level of dissimilar service option appointment.Upper-layer protocol can be various data, services indication QoS or desired other parameter (such as stand-by period or throughput requirement).In alternative embodiment, the Reverse Dedicated Control Channel (R-DCCH) being combined with other reverse link signal, such as reverse fundamental channel (R-FCH) (for example, for voice service), can be used to transmit access request.Conventionally, access request may be described to comprise logic channel, that is, back scheduling request channels (R-SRCH), it can be mapped to such as on the such any existing physical channel of R-DCCH.The back compatible of exemplary embodiment energy is such as the so existing cdma system of IS-2000 version C, and R-REQCH is the physical channel that can adopt in the situation that there is no R-FCH or R-DCCH.For the sake of clarity, R-REQCH is used to describe the access request channel in embodiment description herein, although those skilled in the art expands to this principle in the access request system of any type being easy to, no matter access request channel is the physics of logic.R-REQCH can disconnect, until request is just strobed while being required, has so just reduced to disturb and saved power system capacity.
In the exemplary embodiment, R-REQCH has 12 input bits, these bits comprise following bit: 4 bits that are used to specify the maximum R-E/SCH T/P ratio that travelling carriage can support, be used to specify 4 bits of the data bulk in the buffer of travelling carriage, and be used to specify 4 bits of QoS.It will be understood by those skilled in the art that bit and other various fields that in optional embodiment, can comprise arbitrary number.
Forward direction grant channel (F-GCH) is transmitted into travelling carriage from scheduling base station.F-GCH can comprise many channels.In the exemplary embodiment, adopt public F-GCH to make public allowance, and one or more independent F-GCH channel is utilized for making independent allowance.By the one or more requests on their R-REQCH separately from one or more travelling carriages of scheduling base station in response, make allowance.Grant channel can be noted as GCH x, wherein subscript x sign channel number.Channel number 0 can be used to indicate public grant channel.If N individual channel is used, subscript x can change in 1 to N scope.
Can make independent allowance to one or more travelling carriages, wherein each permits separately allowing the travelling carriage of sign to launch on R-ESCH with the T/P ratio of appointment or lower ratio.Make on the forward link allowance nature and will introduce the expense of using some forward link capacity.Here describe in detail for alleviating and the variety of option of permitting relevant expense, according to principle herein, other options to one skilled in the art also will be clearly.
A consideration is that each travelling carriage will be in different situations, the channel quality that each travelling carriage experience changes.Like this, for example, the travelling carriage with the high geometry character of good forward direction and reverse chain channel may need lower power for permitting signal, and may can utilize high data rate, for independent allowance, is therefore desirable.The travelling carriage of low geometry character, or just experiencing the travelling carriage of very fast decline, may need obviously more power for receiving separately and permit reliably.Such travelling carriage may not be just best candidate for independent allowance.Public allowance for this travelling carriage, will be elaborated below, can less expend forward link expense.
In the exemplary embodiment, many independent F-GCH channels are used to provide in particular moment the independent allowance of respective number.Each F-GCH channel is by code division multiplexing.This facilitates and can launch the energy of each allowance to arrive the required power level of certain expected travelling carriage.In optional embodiment, single independent grant channel can be used, and permits separately for simultaneously many being time-multiplexed.In order to change the power of each allowance on time-multiplexed independent F-GCH, may introduce extra complexity.Can adopt within the scope of the invention arbitrarily signaling technology for transmitting public or independent allowance.
In certain embodiments, consider the independent allowance of the relatively large number of synchronization, adopt the independent grant channel of relatively large number (that is, F-GCH).In this case, may wish to limit the number of the independent grant channel that each travelling carriage must monitor.In one exemplary embodiment, defined each subset of the total number of independent grant channel.The subset that each travelling carriage is assigned to independent grant channel monitors.This makes travelling carriage can reduce the complexity of processing and reduce accordingly power consumption.For example, because scheduling base station may not arbitrarily distribute the set of independent allowance (can not make all independent allowances to the member of Dan Zuzhong, because do not monitor one or more independent grant channel by designing those members), so will weigh the flexibility of scheduling.What note is the loss that the reduction of this flexibility might not cause capacity.In order to illustrate, consider to comprise the example of four independent grant channels.The travelling carriage of even-numbered can be assigned to monitor the first two grant channel, and odd-numbered can be assigned to monitor latter two grant channel.In another example, subset can be overlapping, make the travelling carriage of even number monitor first three grant channel, and the travelling carriage of odd number monitors rear three grant channels.Very clear scheduling base station can not optionally be distributed from four travelling carriages in any one group (even number or odd number).These examples are only illustrative.Can adopt within the scope of the invention the channel with any number of random subset configuration.
Made request but do not receive remaining travelling carriage of independent allowance, can be allowed to send the maximum T/P ratio that this public allowance has specified each remaining travelling carriage to adhere on the R-ESCH that uses public allowance.Public F-GCH is also referred to as the public grant channel of forward direction (F-CGCH).Travelling carriage monitors one or more independent grant channel (or its subset) and public F-GCH.Unless be given independent allowance, otherwise when public allowance is published travelling carriage can launch.Public allowance has indicated remaining travelling carriage (public allowance travelling carriage) can be with the maximum T/P ratio of the QoS transmitting data of certain type.
In the exemplary embodiment, each public allowance is effectively in many subgroup transmission intervals.Once receive public allowance, sent request but the travelling carriage that do not obtain permitting separately can start to launch one or more encoder packet in subsequent transmission interval.Allowance information can be repeated repeatedly.This can send with the power level reducing compared with independent allowance public allowance with regard to allowing.Each travelling carriage can combine energy from a plurality of transmittings with the public allowance of decoding reliably.Therefore, can the public allowance for the mobile station in selecting of low geometry character, for example, in the situation that permitting being considered to waste very much separately with regard to forward link capacity aspect.Yet public allowance still needs expense, below describe in detail for reducing the various technology of this expense.
F-GCH is sent to by base station each travelling carriage that this base station is the transmission scheduling of new R-ESCH grouping.It is sent out during can also and retransmitting in the transmitting of encoder packet, to impel travelling carriage to become if desired at congestion control, revises the T/P ratio of transmitting of the subsequent subpacket of encoder packet.
In the exemplary embodiment, public allowance comprises 12 bits, and these 12 bits comprise that 3 bit type field are used to specify the form of nine bits below.Remaining bit is the maximum T/P ratio allowing of travelling carriage indication of the Three Estate as appointment in type field, wherein with 3 bits, represents the admissible T/P ratio of maximum of each grade.Travelling carriage grade can be based on QoS request, or based on other standards.Other various public allowance forms can be contemplated to, and for the person of ordinary skill of the art will be clearly.
In the exemplary embodiment, permit comprising separately 12 bits, this 12 bit comprises: 11 bits are used to the travelling carriage that is just allowed transmitting to specify mobile ID and the maximum T/P of permission ratio, or change its maximum T/P of permission ratio for signaling clearly travelling carriage, comprise and allow T/P ratio to be set as 0 (that is, inform that travelling carriage need not launch R-ESCH) maximum.These bits are that specific travelling carriage has been specified mobile ID (in 192 values) and the maximum T/P of permission (in 10 values one).In optional embodiment, 1 long allowance bit can be set for specific travelling carriage.When long, permit bit while being configured to 1, travelling carriage is allowed to allow to launch on ARQ channel the individual grouping of relatively large fixing, predetermined number (this number can enough signaling updates).If long, permit bit and be configured to zero, travelling carriage is allowed to launch a grouping.Travelling carriage can be apprised of and with zero T/P ratio, stipulate to disconnect its R-ESCH transmitting, and if long, permit bit and be closing (off) if state or longly within the longer time period permit bit and be out (on), this can be used to signal notice travelling carriage and disconnects it for the transmitting on R-ESCH of the single subgroup transmitting of single grouping.
In one exemplary embodiment, travelling carriage only monitors the F-GCH that is derived from serving BS.If travelling carriage receives F-GCH message, travelling carriage is followed the rate information in F-GCH message and is ignored speed control bit so.A kind of possibility is that travelling carriage can be used following principle, this principle is: if control designator indicated speed from the arbitrary velocity that is not the base station of serving BS, reduce (, RATE_DECREASE order, to elaborate below), even if F-GCH indicates the travelling carriage of advancing the speed also will reduce its speed so.
In optional embodiment, travelling carriage can monitor from all base stations or from the F-GCH of the subset of the base station in the active set of travelling carriage.High-level signaling by handover Indication message or other message to travelling carriage indication monitor any bar F-GCH and as how channel allocation combination they.Note, from the subset of the F-GCH of different base station, can be carried out soft combination.Travelling carriage can be informed to this possibility.After the F-GCH to from different base station has carried out possible soft combination, at any one, constantly still may there are many F-GCH.Then travelling carriage can be defined as minimum allowance speed (or other certain rules) its emission rate.
Reverse Pilot Channel (R-PICH) is transmitted into the base station active set from travelling carriage.In order to use, can measure the power in R-PICH at place, one or more base station in power of reverse link is controlled.As known in the art, pilot signal can be used to provide amplitude and phase measurement, in coherent demodulation.The quantity of the transmitting power that as mentioned above, travelling carriage can be used (no matter dispatched base station limits or be subject to the restriction of inherence restriction of the power amplifier of travelling carriage) is shared in the middle of pilot channel, wall scroll Traffic Channel or many Traffic Channels and many control channels.For higher data rate and modulation format, may need additional pilot power.In order to simplify using and avoiding the some of them problem relevant with the instantaneous change of required pilot power of the R-PICH that controls for power, additional channel can be assigned to as supplementing or auxiliary channel.Although conventionally, as disclosed herein, pilot signal is sent out by usage data sequence, the information of carrying signal can also be used to use when generating the reference information of demodulation.In the exemplary embodiment, R-RICH is used to transmit additional pilots power demand.
Reverse rate indicator channel (R-RICH) is moved platform and is used to refer to reverse traffic channel, the transmitting form on R-ESCH.This channel travelling carriage also can be alternatively called reverse packet data control channel (R-PDCCH).
Whenever travelling carriage is when launching subgroup, R-RICH just can be launched.When travelling carriage is the free time on R-ESCH, R-RICH also can be launched with the indication of zero-speed rate.It is idle that the transmitting of zero-speed rate R-RICH frame (R-RICH that indication R-ESCH be not just launched) helps travelling carriage travelling carriage to be detected, for travelling carriage maintains power of reverse link control, and other functions.
The time started of R-RICH frame is the moment of aiming at the time started of current R-ESCH transmitting.The frame duration of R-RICH can be identical with the frame duration of corresponding R-ESCH transmitting, or shorter than the frame duration of corresponding R-ESCH transmitting.R-RICH carries and transmits the transmitting form of R-ESCH transmitting, such as Payload, Sub-Packet ID and ARQ exemplary sequences numbering (AI_SN) bit with for the CRC of error detection occurs.Exemplary AI_SN is the bit of (flip) of at every turn overturning during the new grouping of transmitting on specific ARQ, is to be again called as " color ratio is special " (" color bit).This can be used to asynchronous ARQ, regularly unfixing between the subgroup transmitting of grouping in asynchronous ARQ.Color ratio spy can be for preventing that receiver from combining the subgroup of a grouping on same ARQ channel and the subgroup of adjacent packets.R-RICH can also transport additional information.
In described exemplary embodiment, enhancement mode reverse complemental channel (R-ESCH) is used as reverse link traffic data channel herein.For R-ESCH can adopt an arbitrary number emission rate and modulation format.In the exemplary embodiment, R-ESCH has following characteristic: support physical layer retransmission.Re-transmission while being 1/4 rate code (Rate 1/4 code) for first yard, retransmits and uses 1/4 rate code and energy combination to be used.For first yard be the re-transmission in when code that speed ratio 1/4 is large, incremental redundancy is utilized.Foundation code is 1/5 rate code.Optionally, can also use incremental redundancy for all situations.
For the dispatched users of certainly advocating peace, support mixed automatic repeat request (HARQ), these two kinds of users can access R-ESCH.
Can support a plurality of ARQ channel synchronization operations with the fixedly timing between retransmitting: between the continuous subgroup of same grouping, can allow a fixed number subgroup.Also allow staggered transmitting.As an example, for the frame of 5ms, 4 channel ARQ are supported in 3 sub-packetization delays between the enough subgroups of energy.
Table 1 has been listed the example data rate of enhancement mode reverse complemental channel.The subgroup size of 5ms is described, and the channel of following has been designed to adapt to this selection.For those skilled in the art, it is apparent that and also can select other subgroup sizes.Be not these channel adjustment pilot reference levels, that is, base station has the flexibility of selecting T/P using given operating point as target.This maximum T/P value is carried out signal notice on forward direction grant channel.When exceeding transmitting power, travelling carriage can be selected lower T/P, with the QoS that allows HARQ satisfy the demand.Layer 3 signaling message also can be launched by R-ESCH, and permission system is without R-FCH and/or R-DCCH operation.
Table 1 enhancement mode reverse complemental channel parameter
In the exemplary embodiment, turbo coding is used to all speed.To R=1/4 coding, use and the current similar interleaver of cdma2000 reverse link (interleaver).Coding to R=1/5, is used and the similar interleaver of cdma2000 forward packet data channel.
The bit number of each encoder packet comprises CRC bit and 6 tail positions (tail bit).For the encoder packet size of 192 bits, use 12 bit CRC, otherwise use 16 bit CRC.The time slot supposition of each 5ms is separated by 15ms, thereby responds the time that reserves for ACK/NAK.If ACK is received, do not launch the remaining time slots of grouping.
Just, the subgroup duration of 5ms and relevant parameter are only as example.According to the principle adopting herein, the combination of the speed of arbitrary number, form, subgroup duplicate contents, subgroup duration etc. to one skilled in the art all can be clearly.In the embodiment of interchangeable 10ms, can adopt and use 3 ARQ channels.In one embodiment, single subgroup duration or the size of frame are chosen.For example, the structure of 5ms or 10ms will be selected.In optional embodiment, system can be supported a plurality of frame durations.
When not there is not F-FCH and F-DCCH or when having F-FCH and F-DCCH but these two kinds of channels are not during to user's special use, Forward Common Power Control Channel (F-CPCCH) can be for carrying out power control to various reverse chain channels.Aspect channel allocation, travelling carriage is assigned to reverse link power control channel.F-CPCCH can comprise many power control sub-channels.
F-CPCCH can transmit and be called the power control sub-channel that public congestion is controlled subchannel (F-OLCH).Although can use other speed, exemplary congestion control subchannel typically speed is 100bps.Referred to here as the individual bit (it can be repeated for reliability) of busy bit in autonomous transmission pattern or be the speed that increases or reduce them in public allowance pattern or the indication of the travelling carriage in these two kinds of patterns.In optional embodiment, permit separately pattern and also can respond to this bit.Can adopt various embodiment to respond the combination in any of the emission type of F-OLCH.This can carry out with random mode or definite mode.
In one embodiment, busy bit is arranged to ' 0 ' and represents that the travelling carriage of this busy bit of response should reduce their emission rate.Busy bit is arranged to the corresponding increase of ' 1 ' expression emission rate.Other signaling schemes of countless versions can be used, and this will be clearly for those skilled in the art, and can describe below various optional examples in detail.
During channel allocation, travelling carriage is assigned to these specific power control channels.The all travelling carriages of power control channel in can control system, or alternatively, the subset of the variation of travelling carriage can be controlled by one or more power control channel.Noting, is only an example to the utilization of this particular channel for congestion control.
Forward direction acknowledgement channel, or F-ACKCH can be used for confirming by base station the correct reception of R-ESCH, and can be used in the existing allowance of expansion.The correct reception of the confirmation on F-ACKCH (ACK) indication subgroup.By travelling carriage, to the additional emission of that subgroup, be unnecessary.Negative acknowledgement on F-ACKCH (NAK) allows travelling carriage to launch another subgroup, and this is limited by the maximum allowable number order of the subgroup of each grouping.
In the embodiment describing in detail herein, F-ACKCH is used to provide to receiving the confirmation of the positive or negative of subgroup, and whether by the indication (will be described about F-RCCH channel below) of issue speed control command.
Fig. 5 is the exemplary embodiment of the F-ACKCH of 3 values of explanation.Whether this exemplary F-ACKCH comprises single designator, and this designator is transmitted into travelling carriage from one or more base stations, be used to indicate from the transmitting on the R-ESCH of travelling carriage and by base station separately, correctly received.In the exemplary embodiment, F-ACKCH designator is launched by each base station in active set.Alternatively, F-ACKCH can be launched by the specified subset of active set.The set that sends the base station of F-ACKCH can be called as F-ACKCH active set.F-ACKCH active set can be notified to travelling carriage by signal by layer 3 (L3) signaling, and can be during channel allocation, in switch indicating information (HDM) or designated by other technologies known in the art.
For example, F-ACKCH can be the channel with the three state of following value: NAK, ACK_RC and ACK_STOP.NAK indication from the grouping of travelling carriage have to be retransmitted (yet, if last subgroup is sent out, travelling carriage may need to use any techniques available, such as request/permit, speed controls or autonomous transmission resends grouping).If NAK is corresponding to last subgroup of grouping, travelling carriage may need to monitor the speed control designator (will further describe below) on corresponding F-RCCH.
ACK_RC indication no longer needs to retransmit the grouping from travelling carriage, and travelling carriage should monitor the speed control designator on corresponding F-RCCH.ACK_STOP does not indicate yet and retransmits at needs.But in this case, travelling carriage should be got back to autonomous mode for transmitting next time, permits message (as described above in detail) unless travelling carriage receives on F-GCH.
Whether L3 signaling can indicate travelling carriage to want soft combination from the F-ACKCH designator of the different base station in its active set.This may be equivalent with the revised edition C controlling power control bit according to IS-2000.For example, may have the designator that sends according to channel allocation for example ACK_COMB_IND or the designator in switching message, it can indicate travelling carriage whether will combine the F-ACKCH designator from different base station.Can adopt various technology to launch F-ACKCH, below will provide the example.Some examples comprise separated TDM channel, TDM/CDM channel or some extended formattings.
In this example, according to grouping, whether be identified, exist two classes according to the result that monitors that F-ACK channel obtains.If NAK is received, can there is multiple option.Travelling carriage can send additional subgroup until sent the subgroup of maximum number.(in the exemplary embodiment, use identical transmitting form to send subgroup, no matter this subgroup is by autonomous transmission or allowance transmitter trigger, and no matter whether this grouping belongs to speed control revised edition.In optional embodiment, can change by any technology with disclosed herein subgroup transmitting form).In the end after the NAK of a subgroup, travelling carriage or can take the action relevant to corresponding speed control command (monitor F-RCCH), according to former allowance or speed control command, stop transmitting (, return to if necessary autonomous transmission), or can respond the allowance newly receiving.
If ACK is received, it may be corresponding to speed control command or the corresponding indication stopping.If indicated speed is controlled, rate control channel (F-RCCH) is monitored and follows.If result is to stop, the speed that travelling carriage is not followed on F-RCCH is so controlled designator and is returned to autonomous mode (mostly to be most the autonomous speed transmitting of maximum of distribution).If receive explicit allowance (explicit grant) when receiving ACK_STOP, travelling carriage is deferred to the order in explicit allowance so.
For example, first consider single-unit activity set member or are identical situations (and therefore being indicated by ACK_COMB_IND) from the designator of whole sectors.There is in this case single synthetic designator.When travelling carriage receives NAK (designator is not sent out), travelling carriage (carving in due course) retransmits next subgroup so.If travelling carriage does not receive the ACK of last subgroup, travelling carriage is proceeded next grouping (erroneous packet can be retransmitted according to the retransmission algorithm of deferring to) so.Yet travelling carriage is used as speed and is controlled indication (that is, monitoring rate control channel).
In this example, basic principle is for (to be applicable to single-unit activity set member and a plurality of different F-ACKCH active set member) as follows.If designator is ACK_STOP or ACK_RC arbitrarily, result is ACK.If there is no designator is ACK_STOP or ACK_RC, result is NAK.So, about speed, control, if designator is ACK_STOP arbitrarily, travelling carriage will stop (that is, returning to autonomous mode, if or have the words of allowance to respond allowance).If there is no designator is that ACK_STOP and at least one designator are ACK_RC, the designator on the rate control channel of the corresponding base station of decoding (F-RCCH).If last subgroup has been launched and all designators are NAK, the designator on the rate control channel of all base stations of decoding (F-RCCH).Below contact is further described to speed of response control command in these sights to the description of F-RCCH.
ACK_RC order, itself and rate control channel are combined, can be taken as the order that a class is called ACK and continues order.Travelling carriage can continue the speed control command that can be published according to various, continues to launch follow-up grouping (describing below each example in detail).ACK and continue order and allow base station to confirm successful receptions to grouping, meanwhile, allows travelling carriage can cause successfully receiving the allowance (obedience according to speed control command can getable revised edition) of grouping to be launched by use.This has just saved the expense of new allowance.
In the embodiment of F-ACKCH illustrated in fig. 5, the negative value of the sure value of ACK_STOP symbol, the NULL symbol of NAK and ACK_RC symbol is used.On-off keying on F-ACKCH (that is, not sending NAK) has given a kind of cost (power demand) sending ACK in base station (especially non-scheduled base station) and has not sent the right to choose of ACK when too high.This just offers a kind of compromise selection between forward link capacity and reverse chain-circuit capacity in base station, because the grouping of not confirmed by ACK correctly receiving may retransmit in time trigger after a while.
Can adopt within the scope of the invention the technology of multiple transmission F-ACKCH.The independent signal of each travelling carriage can be incorporated in common signal channel.For example, the confirmation of a plurality of travelling carriages response can be carried out time-multiplexed.In the exemplary embodiment, on a F-ACKCH, can support at most 96 travelling carriage ID.Can utilize additional F-ACKCH to support additional travelling carriage ID.
Another example is a plurality of confirmation signals of a plurality of travelling carriages to be mapped to Orthogonal Function Set close.Hadamard encoder is for being mapped to an example of the encoder of orthogonal function set.Other various technology also can adopt.For example, walsh code (Walsh code) and other similar error correcting code these information bits that can be used to encode.If independently every subchannel has independently channel gain, can be transmitted into different user with different power levels.Exemplary F-ACKCH transmits the mark of three special-purpose values for each user.Each user monitors F-ACKCH from all base stations in its active set (or optional, signaling can define the active set that reduces to reduce complexity).
In each embodiment, every of two channels is all covered by the Walsh sequence coverage (Walsh cover sequence) of 128 chips.Article one, channel is launched on I channel, and another launches on Q channel.Another embodiment of F-ACKCH supports mostly to be most the travelling carriage of 192 with the Walsh sequence coverage of single 128 chips simultaneously.Exemplary embodiment is the duration that each three value mark is used 10ms.
Recall, when travelling carriage has the grouping that need to use R-ESCH transmission, it can ask on R-REQCH.Base station can be by responding with allowance with F-GCH.But this operation is may some cost too high.In order to reduce forward link expense, F-ACKCH can send ACK_RC mark, and this mark has been expanded existing allowance (obeying speed control) by scheduling base station (or miscellaneous equipment) when supporting to permit from the soft handover of a plurality of base stations with lower cost.This method is used to permit separately and public allowance.ACK_RC is used according to permitting base station (or base station), and has expanded the current allowance to the one or more encoder packet on identical ARQ channel (obeying speed controls).
Noting, as shown in Figure 4, is not that each base station in active set is required to send F-ACKCH's to postbacking.The set that is just sending the base station of F-ACKCH in soft handover can be the subset of active set.The U.S. Patent Application No. 10/611 of the common pending trial that is entitled as " Code DivisionMultiplexing Commands On a Code Division Multiplexed Channel " (" the code division multiplexing order on code division multiplexing channel ") of submitting on June 30th, 2003, in 333, disclose for launching the exemplary techniques of F-ACKCH, this patent is transferred to assignee of the present invention.
Forward direction rate control channel (F-RCCH) is transmitted into travelling carriage from one or more base stations, with the speed adjustment of transmitting next time of signal notice.Travelling carriage can be assigned to monitor from F-ACKCH active set or from each member's of the subset of F-ACKCH active set designator.The set of the base station of the F-RCCH that for the sake of clarity, transmission is monitored by travelling carriage is called as F-RCCH active set.F-RCCH active set can carry out signal notice by layer 3 (L3) signaling, and layer 3 signaling can be during channel allocation, appointment in switch indicating information (HDM), or specify by other variety of way well known by persons skilled in the art arbitrarily.
Fig. 6 has illustrated exemplary F-RCCH.This F-RCCH is the three state channel with following value: RATE_HOLD, and indication travelling carriage can be with only identical with the speed of the current group next grouping of speed transmitting; RATE_INCREASE, indication travelling carriage can be launched the maximum rate of next grouping with respect to the emission rate increase of current group definitely or randomly; And RATE_DECREASE, indication travelling carriage can definitely or reduce to launch the maximum rate of next grouping randomly with respect to the emission rate of current group.
Whether L3 signaling can indicate travelling carriage will combine from the speed of different base station and control designator.This to utilize power control bit in IS-2000 revised edition C to make similar.Like this, will exist based on channel allocation, send and be arranged in the designator that switches message, RATE_COMB_IND for example, whether it wants soft combination from the F-RCCH bit of different base station indication travelling carriage.Those skilled in the art will recognize that, exist many for transmitting such as F-RCCH, comprise the form of channel of the TDM/CDM channel of separated TDM channel, combination, or other form.
In each embodiment, can exist various speed to control configuration.For example, all travelling carriages can be controlled by the single designator of each sector.Alternatively, each travelling carriage can be controlled by the independently designator that is exclusively used in every sector of each travelling carriage.Or the designator that the group of travelling carriage can self be distributed by them is controlled.Such configuration makes the travelling carriage with identical maximum QoS grade be assigned with identical designator.For example, unique stream is designated as all travelling carriages of " best effort " and can be controlled by the designator of a distribution, so just allows the load reducing for the stream of these best effort.
In addition, signaling can, for configuration travelling carriage, only note from serving BS or from the F-RCCH designator of all base stations in F-RCCH active set travelling carriage.Be noted that, if travelling carriage only monitors that it is identical specifying the designator from a plurality of base stations from the designator of serving BS and RATE_COMB_IND, travelling carriage can combine all designators in the group identical with serving BS before making decision so.The set that the different speed at any time with use is controlled the base station of designator can be called as the current set of F-RCCH.Like this, if travelling carriage is configured to make travelling carriage only to note the F-RCCH designator from serving BS, the size of the current set of F-RCCH is 1 so.
Be envisioned that, the service regeulations of F-RCCH can be regulated by base station.Below for the regular exemplary collection of travelling carriage with single member's the current set of F-RCCH.If RATE_HOLD is received, travelling carriage does not change its speed.If receive RATE_INCREASE, travelling carriage increases by one by its speed (that is, a speed level, the above example describing in detail in table 1).If receive RATE_DECREASE, travelling carriage reduces one its speed.Note, travelling carriage only when environment indicate, just monitor these designators (, as the behavior of ACK result, below by what further describe, its indicated speed control activates).
Below for the regular exemplary collection with the current set member's of a plurality of F-RCCH travelling carriage.The simple rule that speed is increased/reduces to 1 speed is modified.If receive any ACK_STOP, travelling carriage returns to autonomous speed.Otherwise if any designator is RATE_DECREASE, travelling carriage reduces its speed once.If there is no designator is RATE_DECREASE, and at least one base station speed with indication RATE_HOLD controls the behavior of (result of processing as ACK), and travelling carriage maintains identical speed so.If there is no designator is RATE_DECREASE, do not have base station indicated speed to control and RATE_HOLD, and at least one base station have the behavior of speed control and the indication of RATE_INCREASE; Travelling carriage adds one its speed so.
the embodiment of example combinations allowance, ARQ and speed control command
In order to summarize some above embodiments of introducing, travelling carriage can be authorized to carry out autonomous transmission, although this may be restricted in throughput, is convenient to have low time delay.Under these circumstances, travelling carriage can be launched and (be T/P without the T/P ratio to maximum R-ESCH max_auto) request, this T/P max_autocan by base station, by signaling, be arranged and regulate.
Can determine scheduling at place, one or more scheduling base station, and can distribute reverse chain-circuit capacity by the allowance with relatively high speed transmitting on F-GCH.In addition, speed control command can be used to revise transmitting or the autonomous transmission of permitting in the past with lower expense, has so just adjusted the distribution to reverse chain-circuit capacity.Therefore scheduling can be used to closely control reverse link load, and has so just protected voice quality (R-FCH), DV feedback (R-CQICH) and DV to confirm (R-ACKCH).
Permit separately making to control in detail the transmitting of travelling carriage.Can select travelling carriage based on geometry character and QoS, so that the throughput-maximized while maintains again required service level.Efficient notice is convenient in public allowance, especially for the travelling carriage of low geometry character.
Effectively realize " ACK and continuation " order with F-RCCH channel group F-ACKCH channel altogether, it has expanded existing allowance with lower cost.(as mentioned above, this continuation process can be controlled by speed, and is being further described below).These principles are all effective to independent allowance and public allowance.The U.S. Patent Application No. 10/646 that is entitled as pending trial in " Scheduled andAutonomous Transmission and Acknowledgement " (" be scheduled with autonomous transmission and confirmation ") of submitting on August 21st, 2003, various embodiment and technology for scheduling on the shared resource such as 1xEV-DV reverse link, allowance and transmitting are disclosed in 955, wherein this patent is transferred to assignee of the present invention, and is incorporated herein this patent as a reference.
Fig. 7 has illustrated illustrative methods 700, and one or more base stations can utilize the method response to carry out partition capacity from request and the transmitting of one or more travelling carriages.Note, shown square frame order is only an example, and the order of each square frame can be exchanged and can with other unshowned combinations of blocks, these can not depart from the scope of the present invention.This processing starts at square frame 710 places.It may be the transmission requests of being launched by one or more travelling carriages that base station receives any.Because method 700 can be recycled indefinite time, so the formerly request that may likely also not be allowed is also received, these requests can combine according to request, to estimate the quantity required of transmitting with new request.
In square frame 720, one or more travelling carriages can be launched each subgroup, and these subgroups are received by base station.These subgroups that are launched can be according to (may be revised by former speed control command) of former allowance transmitting or (also may be revised by former speed control command) of independently launching.The number of the number of autonomous transmission, the travelling carriage being registered and/or other factors can be used to estimate the quantity required to autonomous transmission.
In square frame 730, any subgroup receiving of base station decodes, alternatively with soft the combining of subgroup receiving in the past separately, to determine whether grouping is inerrably received.These are determined and will be used to the sure or negative confirmation of transmitting mobile stations transmission separately.Wander back to, HARQ can be used to the grouping transmitting on R-ESCH.Namely, grouping can be launched at most some time until it is correctly received by least one base station.At each frame boundaries place, each base station decodes R-RICH frame is also determined the transmitting form on R-ESCH.This decision can also be made by the R-RICH frame with current and former R-RICH frame in base station.Optionally, can also make decision by utilizing from the out of Memory of reverse less important pilot channel (R-SPICH) and/or R-ESCH extraction in base station.Utilizing this transmitting form determining, tries by the grouping of using the former subgroup receiving to decode at the appropriate time on R-ESCH in base station.
In square frame 740, base station operation dispatching.Can adopt dispatching technique arbitrarily.For thereby operation dispatching distributes shared resource (be reverse chain-circuit capacity in this example), base station can be according to request, the autonomous transmission of expecting, the estimation of current channel adjustment and/or other various parameters are multiplied by a coefficient to mission need.Scheduling can be taked various forms for each travelling carriage.Each example comprises makes allowance (distribute, increase allowance in the past or reduce former allowance according to request), generation for increasing, reduce or maintain the speed control command of former allowance speed or autonomous transmission, or ignore request (converting travelling carriage to autonomous transmission).
In step 750, the transmitting that base station receives for each travelling carriage processing.This can comprise, except other function, confirms the subgroup that receives, and generates conditionally the allowance of response transmission requests.Fig. 8 has illustrated the illustrative methods 750 that generates allowance, confirmation and speed control command.It is suitable in illustrative methods 700 illustrated in fig. 7, and can be transformed into and utilize other method to use, and this to those skilled in the art will be clearly.As mentioned above, during each process method 700, method 750 can circulate for each movable travelling carriage.
In decision block 805, if the subgroup of current just processed travelling carriage is not also received, advance to square frame 810.Without the need for confirmation, and can not issue speed control command.F-ACKCH and F-RCCH do not need to be launched, and these two symbols can be by DTX (not launching).In decision block 815, if received request, advance to decision block 820.Otherwise this processing can stop.
At decision block 820, if determine and permit for this travelling carriage between schedule periods, advance to square frame 825 and on suitable F-GCH, launch allowance.Then this processing can stop.Travelling carriage can be permitted transmitting (describing regularly example in detail below with reference to Figure 10-12) according to this at the next one suitable image duration.
Turn back to decision block 805, if be received from the subgroup of travelling carriage, advance to decision block 830.(attention, may be that subgroup and request are received, and can carry out the Liang Tiao branch that comes from decision block 805 for travelling carriage in this case, does not for the sake of clarity show details).
In decision block 830, if the subgroup receiving is correctly decoded, will generate ACK.Advance to decision block 835.If expect to have speed, control (comprising that speed keeps, i.e. " continuation "), advance to square frame 845.If do not expect to have speed, do not control, advance to square frame 840.In square frame 840, on F-ACKCH, launch ACK-STOP.F-RCCH does not need to be launched, and, may produce DTX that is.If now generate permitted, travelling carriage will be transferred to autonomous transmission (or must stop, if autonomous transmission can not or not adopted words).Alternately, can ignore and cease and desist order and issue new allowance.As mentioned above, advance to decision block 820 to process this decision.
In square frame 845, speed is controlled and is instructed to.Same, will on F-ACKCH, launch ACK_RC.Advance to decision block 850.If wishing increases, on F-RCCH, launch RATE_INCREASE.Then this processing can stop.If not wishing increases, advance to decision block 860.In decision block 860, if wish to reduce, on F-RCCH, launch RATE_DECREASE.Then this processing can stop.Otherwise, on F-RCCH, launch RATE_HOLD.In this example, by DTX indication hold mode.Then this processing can stop.
Turn back to decision block 830, if the subgroup receiving is not correctly decoded, will generate NAK.Advance to square frame 875 to launch NAK on F-ACKCH.In this example, NAK is indicated by DTX.Advance to decision block 880 to judge whether the subgroup receiving is last subgroup (that is, having reached the maximum number that subgroup retransmits).If not, in this example, travelling carriage can retransmit according to former transmitting form.DTX can launch on F-RCCH, as indicated in square frame 895.(optional embodiment can carry out optional signaling in this case, and the example will be described below.) then this processing can stop.
If subgroup that receive and quilt response NAK is last subgroup, from decision block 880, advance to decision block 885 to determine whether to wish to carry out speed control (comprising maintenance).This is the exemplary techniques with the allowance before low expense expansion or autonomous transmission (if yes, comprising the control of former speed).If do not expect to carry out speed control, for F-RCCH generates DTX.In this example, travelling carriage will be launched next subgroup.Similar with decision block 835, if not for travelling carriage generates new allowance, this travelling carriage will be transferred to autonomous transmission (if possible).Alternatively, can generate new allowance, it will indicate available transmitting for travelling carriage.As mentioned above, advance to decision block 820 to carry out this judgement.
In decision block 885, if speed control is carried out in expectation, advance to decision block 850.As mentioned above, can increase, reduce or keep for the transmitting on F-RCCH generates.Then this processing can stop.
Generally, if grouping is correctly received, base station can send positive acknowledgement can be conditionally to travelling carriage sending rate control message.
Base station can (on F-ACKCH) send ACK_STOP with signal grouping and be passed and travelling carriage for launch and return to autonomous mode next time.If necessary, base station can also send new allowance.For transmitting next time, travelling carriage can be mainly with the speed transmitting of permitting.In either event, the upper transmitting of F-RCCH DTX.In one embodiment, only have service (or allowance) base station can generate allowance.In optional embodiment, one or more base stations can generate allowance (details of processing this option will be in following detailed description).
Base station can (on F-ACKCH) sends ACK_RC and (on F-RCCH) sends RATE_HOLD, with signal that grouping is passed and travelling carriage can to send the maximum rate of next grouping identical with the transmission rate of current group.
Base station can (on F-ACKCH) send ACK_RC and (on F-RCCH) transmission RATE_INCREASE, and to signal, grouping is transmitted and the travelling carriage maximum rate that the next grouping of transmission rate increase of current group is launched relatively.Travelling carriage can be followed some rule that base station and travelling carriage all know and advance the speed.This increase can be that determine or random.Person of skill in the art will appreciate that countless versions is for increasing the rule of speed.
Base station can (on F-ACKCH) sends ACK_RC and (on F-RCCH) sends RATE_DECREASE, with signal that grouping is transmitted and travelling carriage relatively the transmission rate of current group reduce the maximum rate that next subgroup is launched.Travelling carriage can be followed some rule that base station and travelling carriage all know and reduce speed.This reduces can be that determine or random.Person of skill in the art will appreciate that countless versions is for reducing the rule of speed.
If grouping is successfully received by base station, and grouping can be by further re-transmission (that is, not being last subgroup), and base station sends NAK on F-ACKCH.What note is that F-RCCH above sends DTX in this example.
If can not further retransmit (that is, last subgroup) to grouping, following is the possible action that base station can be taked.Base station can send NAK (on F-ACKCH) and the allowance message on F-GCH simultaneously, and to signal, travelling carriage grouping is not transmitted and travelling carriage can be maximum to permit speed transmitting for transmitting next time.F-RCCH above launches DTX in this case.In one embodiment, only have service (or allowance) base station can generate allowance.In optional embodiment, one or more base stations can generate allowance (details of processing this selection will be in following detailed description).
Base station also can (on F-ACKCH) sends NAK and (on F-RCCH) sends RATE_HOLD, with signal that grouping is not passed and travelling carriage can to send the maximum rate of next grouping identical with the transmission rate of current group.
Base station also can (on F-ACKCH) sends NAK and (on F-RCCH) sends RATE_INCREASE, with signal that grouping is not transmitted and travelling carriage relatively the transmission rate of current group increase the maximum rate that next subgroup is launched.Travelling carriage can be followed some rule that base station and travelling carriage all know and advance the speed.This increase can be that determine or random.
Base station also can (on F-ACKCH) sends NAK and (on F-RCCH) sends RATE_DECREASE, with signal that grouping is not transmitted and travelling carriage relatively the transmission rate of current group reduce the maximum rate that next subgroup is launched.Travelling carriage can be followed some rule that base station and travelling carriage all know and reduce speed.This reduces can be that determine or random.
In optional embodiment, (in Fig. 8, do not show its details), the substitute that can generate NAK and stop.For example, in above sight, the DTX on the F-RCCH of corresponding NAK can not be come with " NAK and maintenance " difference.If wish one for forcing to stop the order of (or for being transformed into autonomous transmission), base station also can be in the end be controlled to indicate with NAK and speed before a subgroup, and about the speed of last subgroup, keeping (or increase or reduce) is will represent to stop.For example, in particular cases this, any one speed control command (that is, RATE_INCREASE, RATE_DECREASE, or RATE_HOLD) can be assigned to represent to stop.Travelling carriage will know when last subgroup is sent out, and therefore can resolve subsequently speed control command.When base station is known: be to stop if following closely in the situation that NAK occurs after the transmitting of last subgroup, selected speed control command can be published with together with the NAK of previous subgroup.The travelling carriage that receives the identified speed control command together with the NAK with (not being last) subgroup will be known, NAK (and RATE_HOLD about last subgroup, for example) will mean that any allowance meeting is in the past abolished, and travelling carriage must return to autonomous transmission.But still may have send together with last subgroup NAK but be not used in the speed control command (that is, RATE_INCREASE or RATE_DECREASE) of this object.Possibility be send there is zero (or reduction) speed allowance together with last NAK, although this is by the additional expense of needs.Those skilled in the art weighs these possibilities by the possibility and other possibility that are easy to according to " NAK and stop ".Then can the possibility based on variety of event optimize required expense.
Fig. 9 has illustrated that travelling carriage is for monitoring and respond the illustrative methods 900 of allowance, confirmation and speed control command.This method is adapted at adopting in one or more travelling carriages, and as mentioned above, these travelling carriages are used for the one or more base stations united use adopting with method 700, and combine use with other base station embodiment.
This processing starts from square frame 910.Travelling carriage monitors F-GCH, F-ACKCH and F-RCCH.Note, in different embodiment, as mentioned above, travelling carriage can monitor one or more in these channels.For example, may have many grant channels, and each travelling carriage can monitor one or more in the middle of them.Also be appreciated that, every in these channels can receive from a base station, or can receive from more than one base station during in soft handover at travelling carriage.Channel can merge message or the order of pointing to a plurality of travelling carriages, and travelling carriage can extract its message of special sensing or order like this.
Also can adopt other principle to allow travelling carriage to monitor conditionally wherein one or more control channel.For example, as mentioned above, when ACK_STOP is published, F-RCCH can not be launched.Note, in this case, when ACK_STOP is received, travelling carriage is without monitoring F-RCCH.Can stipulate a rule, only at travelling carriage, send while permitting request that message and/or speed control command can be responded, travelling carriage is just found and is permitted message and/or speed control command.
In the following description of Fig. 9, suppose that travelling carriage had sent subgroup in the past, and expection there is confirmation (comprising potential allowance or the speed control command) response for this subgroup.If request was not allowed in the past, travelling carriage can still monitor for the allowance of the request of transmission before responding.Those skilled in the art will be easy to a method 900 and be transformed into and can solve this situation.For discuss clear for the purpose of, these and other potential travelling carriage function blocks is omitted.
From decision block 915 places, the processing of F-ACKCH starts.Travelling carriage extracts the information on all F-ACKCH channels that it monitors.Wander back to, between travelling carriage and each member of its F-ACKCH active set, may have F-ACKCH.The some of them of F-ACKCH order can be by soft combination resemble stipulating by L3 signaling.If travelling carriage receives at least one positive acknowledgement, ACK_RC or ACK_STOP (on F-ACKCH), current group is correctly received, and does not need to launch additional subgroup.The speed that the transmitting of dividing into groups for the next one allows, if any, needs to be determined.
In decision block 915, if ACK_STOP is received, travelling carriage can be recognized, the subgroup of transmitting was correctly received in the past, and speed control command is without decoded.
In decision block 920, travelling carriage determines whether on F-GCH, to receive allowance.If travelling carriage is according to permitting the next grouping of transmitting, as indicated in square frame 930.In one embodiment, only have an allowance base station to make allowance.If receive ACK_STOP from base station and permit message, travelling carriage is launched new grouping to be equal to or less than the arbitrary velocity of allowance speed on identical ARQ channel.
In optional embodiment, more than one base station can send allowance.If this allowance is coordinated in base station, and send identical message, travelling carriage can those allowances of soft combination.Can adopt various rules to process the situation that different allowances are received.An example is to allow the minimum speed limit transmitting of travelling carriage to indicate in the allowance receiving, thereby avoid the excessive interference (comprise the ACK_STOP permitting without corresponding, indication transmitting should return to autonomous mode) in the community of the allowance base station corresponding to separately.Other various possibilities to one skilled in the art also will be clearly.If do not receive allowance in decision block 920, travelling carriage must turn back to autonomous speed, as shown in square frame 925.Then this processing can stop.
Turn back to decision block 915, if ACK_STOP is not received, advance to decision block 940.If ACK_RC is received, travelling carriage monitors and receives the corresponding F-RCCH of the base station of positive acknowledgement from it, if there is this F-RCCH.Note, because F-RCCH active set is the subset of F-ACKCH active set, allly between base station and travelling carriage, may not have F-RCCH.It is also noted that, when travelling carriage receives the F-ACKCH from a plurality of base stations, corresponding message may be conflicted.For example, may receive one or more ACK_STOP orders, may receive one or more ACK_RC orders, may receive one or more allowances, or the combination in any of above situation.Those skilled in the art will recognize that and be variously used for realizing to adapt to any rule that may situation.For example, travelling carriage can determine that minimum possible transmitting allows (its ACK_STOP that can never be allowed, with choosing in the middle of the ACK_RC reducing or the allowance with lower value) and can correspondingly launch.This with the technology type that is known as " reduce pattern or (OR-of-Downs) " rule seemingly.Such technology can be used to strictly to avoid the excessive interference with neighbor cell.Or one or more base stations can have the priority of distributing to them, one or more base stations can be had surpasses the ability of other base station (perhaps having additional conditions).For example, scheduling (or permit) base station may be than some priority more of other base station in soft handover.Else Rule also can be expected.(wander back to, one or more NAK also can be received, but travelling carriage is without repeating transmission.But when needed, travelling carriage can merge in a similar fashion from speed control command or the allowance of sending out the base station of NAK).In order to simplify discussion herein, when whether explanation travelling carriage is determined ACK_STOP, ACK_RC, NAK or permitted being received, it can be that the regular collection of wanting is applied to the result in some orders that receive, or result is identified order.
If ACK_RC is received, advance to decision block 945 to start to determine the speed control command that follow which kind of type.If indication increases, advance to square frame 950.Transmitting next time can be that the speed to increase from present rate is launched on identical ARQ channel.Then, this processing can stop.In addition, this increase can be that determine or random.Equally, RATE_INCREASE may not necessarily cause instant speed to increase, but can be in the emission rate that in the future increases travelling carriage (, may use at travelling carriage place credit formula algorithm (credit-likealgorithm)), or RATE_INCREASE may cause increasing a plurality of speed that generate.In exemplary credit algorithm, travelling carriage maintain internal " balance/credit " parameter.When it receives RATE_INCREASE but can not increase its speed (because it has exhausted power or has exhausted data), travelling carriage increases this parameter.When power or data become available to travelling carriage, it can use " credit/balance " of the storage in selecting data rate.Various modes of advancing the speed to one skilled in the art will be clearly.
If indication does not increase in decision block 945, advance to decision block 955 and reduce to determine whether indication.If indication reduces, advance to square frame 960.Transmitting next time can be launched with the speed reducing from present rate on identical ARQ channel.Then this processing can stop.In addition, this to reduce can be that determine or random.Equally, RATE_INCREASE may not necessarily cause instant speed to reduce but will in the future reduce from the emission rate of travelling carriage (, at travelling carriage place, use credit formula algorithm), or RATE_DECREASE may cause reducing a plurality of speed of generation.When exemplary credit algorithm is used in the context of RATE_DECREASE, for example, when travelling carriage obtains RATE_DECREASE but for some reason (, have urgent data to be sent out) can not follow this order time, it obtains negates credit, and this negative credit need to repaid after a while in some sense.The variety of way that reduces speed to one skilled in the art will be clearly.
If increase and reduce not all to be instructed to, RATE_HOLD is received.As shown in square frame 965, travelling carriage can send with the maximum rate equating with current group speed next grouping.Then this processing can stop.
Turn back to decision block 940, if do not have a kind of ACK to be identified, NAK will be determined and will be received.At decision block 970, if grouping still may be retransmitted (that is, current subgroup is not last subgroup), travelling carriage retransmits this subgroup on identical ARQ channel, and Sub-Packet ID adds one simultaneously, as illustrated in square frame 980.
In decision block 970, if current group is last subgroup, travelling carriage has been used up the re-transmission of grouping.Advance to decision block 975 to determine whether to receive allowance (in similar to square frame 920 as described above mode).If permit message, be assigned to travelling carriage (as mentioned above, no matter being from single base station or from more than one base station), the speed that travelling carriage can be permitted to be equal to or less than speed sends new grouping on identical ARQ channel.As mentioned above, advance to square frame 930.
In decision block 975, if also do not receive allowance, travelling carriage can monitor F-RCCH active set, obtains speed control command, and decision can send the maximum rate using when the next one divides into groups on identical ARQ channel.When being received, more than one speed control command can make like that by above-mentioned the selection of speed.Advance to decision block 945 and proceed like that by above-mentioned.
The exemplary embodiment that other various technology also can be moved platform adopts.Travelling carriage can monitor the number (that is, not having certainty to confirm after last subgroup) of packet erasure.The number of the grouping that can pass through to calculate the number of continuous packet erasure or be wiped free of by (that is, sliding window) in calculation window is made measurement.If travelling carriage is recognized too much grouping and is wiped free of, can reduce its emission rate, even if speed control command is indicated another order (that is, RATE_HOLD or RATE_INCREASE).
In one embodiment, permit message and can there is the priority that specific speed control bit is higher.Optionally, can treat allowance message by the priority identical with speed control bit.Under these circumstances, speed determines to be modified.For example, if permit message, be not assigned to travelling carriage, use " reduce pattern or " rule or similar rule determine the speed of transmitting next time according to all speed control commands (RATE_INCREASE, RATE_HOLD, RATE_DECREASE and ACK_STOP).When permitting being also received, the speed of transmitting can be by being used next time " reduce pattern or " rule or similarly rule according to all speed control commands (RATE_INCREASE, RATE_HOLD, RATE_DECREASE and ACK_STOP), determine, its result will be compared with the less speed of allowance speed and selection.
Can adopt signaling to configure travelling carriage, travelling carriage is only monitored from serving BS or from the F-RCCH designator of all base stations in F-RCCH active set.For example, when RATE_COMB_IND may specify the speed control command from a plurality of base stations, be identical, travelling carriage can combine all designators in identified group before making decision.The number of the different designators that use at any time can be indicated as the size of the current set of F-RCCH.In an example, travelling carriage can be configured to only monitor that F-RCCH designator from serving BS, and the size of the current set of F-RCCH is in this case 1.
In addition, as mentioned above, can adopt various rules to respond the order regulations speed on F-RCCH.Any bar of these rules can be regulated by the signaling from base station.In an example, can there is one for determining whether travelling carriage increases or reduce its speed and increase or reduced the probability of how much speed and the set of step-length.These probability and possible speed step-length can where necessary, be upgraded by signaling.
As mentioned above, method 900 can be transformed into the possibility that comprises the various methods 750 for base station employing.For example, in one embodiment, because the indicated speed together with NAK of the DTX on F-RCCH keeps, NAK and ceasing and desisting order not by clear and definite definition.In optional embodiment, corresponding above-mentioned any one in the middle of the alternative technology of method 750, NAK and hold function can be used.Equally, such about method 750 as mentioned above, in the exemplary embodiment, the speed changing based on speed is controlled or is permitted being carried out at boundaries of packets place.The described method of expection may be modified as the speed change that also merges inner subgroup.
Principle according to herein, will be apparent from for those skilled in the art, and arbitrary process described herein and feature can be combined in every way.For example, travelling carriage can be only controlled by permitting by main base station, but can't help other base station through-rate control bit, controls.Alternately, travelling carriage can by from all base stations or from the allowance of the subset of the base station in its active set, controlled.Some F-GCH can be by soft combination.The pattern of travelling carriage operation can be set up by L3 signaling during channel allocation, or by other message, sets up during packet data call.
As another example, if grouping is correctly received, main base station can send ACK_STOP or ACK_RC.Can not use speed control command, so ACK_RC can be used to indicate " ACK and continuation " for this pattern.In this context, the speed that " ACK and continuation " indication travelling carriage can be identical with the grouping with being identified sends new grouping.As before, if ACK_STOP is sent out, base station can send the allowance (overriding grant) of bypassing the immediate leadership being assigned on the F-GCH of MS.In this example, unless corresponding, permit being sent out together with NAK, otherwise NAK will indicate " NAK and stop ".In this case, non-main base station also sends ACK_STOP or ACK_RC, and wherein ACK_RC does not follow with speed control command, and indication " ACK and continuation ".
In the exemplary special pattern of another kind, this pattern has merged the subset of described feature, and travelling carriage only can be controlled by through-rate control bit (from the base station in its F-RCCH active set).This pattern can be established by L3 signaling during channel allocation or by other message, be established during packet data call.In this pattern, if grouping is not successfully received, base station sends NAK.When grouping is correctly received then, base station F-RCCH (RATE_HOLD, RATE_INCREASE or RATE_DECREASE) together with ACK_STOP or ACK_RC sends.In the end the NAK after a subgroup is accompanied with F-RCCH (RATE_HOLD, RATE_INCREASE or RATE_DECREASE).
Figure 10-12 have shown the example to the timing of various channels described herein of explanation.These examples do not represent any specific selection to frame length, and the relative timing of allowance, ACK and speed being controlled to (RC) designator has just been described.ACK designator, RC designator and allowance occur during the identical time interval, make travelling carriage for being applied in of next one grouping transmitting roughly the same moment reception ACK, RC and allowance information.In these examples, except travelling carriage receive while permitting or when all subgroups have been sent out, travelling carriage does not need to monitor RC designator (as described in above exemplary embodiment).Travelling carriage monitors and distributes to its ACK bit or distribute to the ACK bit for the RC designator of specific ARQ sequence.For example, if there are four ARQ sequences, and travelling carriage sends in all ARQ sequences, and travelling carriage monitors ACK designator and the ACK designator to the RC designator (if available) of each frame of each frame so.Between each transmitting, introduce empty frame, think base station or travelling carriage (if available), the time of reserving that receives the decode to request, subgroup transmitting, allowance, confirmation and speed control command.
Note, these timing diagrams are not exhaustive, but only for above-mentioned each side is described.One of ordinary skill in the art will recognize that the combination of countless versions sequence.
Figure 10 has illustrated the timing to the exemplary embodiment with combination confirmation and rate control channel.Travelling carriage sends transmission requests on R-REQCH.Base station responds subsequently this request and on F-GCH, sends allowance.Then travelling carriage sends first subgroup by utilizing according to the parameter of permitting.As indicated in the failure of subgroup transmitting, in base station virgin grouping, be not correctly decoded.Base station sends the speed control command on ACK/NAK on F-ACKCH transmitting and F-RCCH together.In this example, NAK is sent out, and the upper transmitting of F-RCCH DTX.Travelling carriage receives NAK and retransmits the second subgroup as response.Specifically, base station second subgroup of correctly decoding, and again send together ACK/NAK transmitting on F-ACKCH and the speed control command on F-RCCH.In this example, do not send additional allowance.ACK_RC is sent out, and speed control command is published (as determined according to the scheduling of expectation, it can be indicated increase, reduces or keep).Then, travelling carriage, by utilizing and permitting parameter relevant, that revised by the speed control command on F-RCCH where necessary, sends the first subgroup of next grouping.
Figure 11 has illustrated having the confirmation of combination and rate control channel together with the timing of new exemplary embodiment of permitting.Request, allowance, subgroup transmitting (not being correctly decoded) and NAK are sent out, and first group of eight frame describing with above Figure 10 are the same.In this example, second subgroup transmitting is also correctly received and is correctly decoded.But base station sends ACK_STOP, rather than send ACK_RC.If do not follow the allowance of ACK_STOP, travelling carriage will revert to autonomous transmission.And new allowance is sent out.Travelling carriage is not required to be this frame and monitors F-RCCH.Then, travelling carriage sends the first subgroup of next grouping according to this new allowance.
Figure 12 has illustrated the timing of the exemplary embodiment to having the confirmation of combination and rate control channel but not having to permit.This example is identical with Figure 10, except there is no to permit being sent out to respond original travelling carriage request.Like this, the first subgroup transmitting of the first grouping is sent with autonomous speed.Again, this subgroup is decoded improperly at place, base station.Second subgroup is correctly decoded again, and ACK_RC is sent out together with speed control command.Then, travelling carriage is may controlled speed sending next grouping.This example has illustrated the possibility of only using speed control command and at random changing travelling carriage speed without any allowance ground.
Note, in alternative embodiment, base station can be used and be utilized the speed of autonomous transmission to control, wherein autonomous transmission can with or without previous request.Minimizing can be used to alleviate congestion, and increases and can be awarded when there is extra capacity, even if BS may not know request of data, because this request is not sent out.
Figure 13 has illustrated the exemplary embodiment of the system 100 that comprises special-purpose speed control signal and public speed control signal.Special-purpose rate control channel (F-DRCCH) 104 is sent to travelling carriage 106 from base station.As mentioned above, F-DRCCH, in fact in the mode identical with F-ACKCH and F-RCCH, is used from forward direction acknowledgement channel (F-ACKCH) a confirmation is provided, continues to permit and carry out speed and control.Base station can send special-purpose rate control channel to each in the middle of a plurality of travelling carriages.In this example, base station also sends public rate control channel (F-CRCCH).Public rate control channel can be used to control the speed of one group of travelling carriage simultaneously.
Figure 14 has illustrated the embodiment of the system 100 that comprises forward direction expansion acknowledgement channel (F-EACKCH).F-EACKCH can replace acknowledgement channel (that is, above-mentioned F-ACKCH) and rate control channel (that is, F-RCCH).The function of these two kinds of channels can be incorporated in a channel in the mode consistent with each embodiment of the present invention.F-EACKCH is sent to one or more travelling carriages 106 from one or more base stations 104.As mentioned above, and according to below by further describe like that, F-CRCCH can be sent out together with F-EACKCH.Yet public rate control channel is different with the concept of expansion acknowledgement channel, all these two do not need to be combined (so as shown in Figure 14, have the dotted line that represents F-CRCCH).
For example, F-ACKCH can comprise the order according to two bits of data pattern (having four kinds of states).ACK and continuation information can be got up with the command in combination that data rate increases, as the first state.The command in combination that ACK and continuation information can reduce with data rate, as the second state.ACK and to stop can be the third state, and NAK is the 4th state.These four kinds of states can be with representing according to the I of public's known technology and Q modulation format constellation.
Figure 15 has illustrated the upper exemplary constellation using of applicable F-EACKCH.As known in the art, can use quadrature amplitude modulation (QAM) technology to utilize such constellation.In optional embodiment, as shown, can utilize any two signals by command mapping in two dimensions.
In this example, seven points are assigned to each order.Empty transmitting (0,0) point is assigned to NAK_HOLD.This may be the order being most possibly sent out, and therefore distribution can be preserved transmitting power and capacity like this.Be assigned to other each order of point on circumference, as shown, comprise ACK_INCREASE, ACK_HOLD, ACK_DECREASE, NCK_DECREASE, NCK_INCREASE and ACK_STOP.Each in these orders can be used as single QAM modulation symbol and send.Each order is corresponding to a pair of order sending in the simulation set at F-ACKCH and F-RCCH channel.ACK_INCREASE indication: former subgroup is correctly decoded, and subgroup in the future can send with the speed increasing.ACK_HOLD indication, former subgroup is correctly decoded, and subgroup in the future can send with present speed.ACK_DECREASE indication: former subgroup is correctly decoded, and subgroup in the future can be sent out, although will send with the speed reducing.ACK_STOP indication: former subgroup is correctly decoded, but any former allowance and/or speed control command are abolished.Travelling carriage only can be transferred to autonomous mode (if available).
NAK_INCREASE indication subgroup is not correctly decoded.Transmitting in the future should transmit with higher speed (may be because capacity limit is loosened for instance).In one embodiment, speed control command is transmitted after final subgroup transmitting.Optional embodiment is convenient to have at any time the speed control transmitting of NAK.In a similar manner, NAK_DECREASE indication: former subgroup is not correctly decoded, and transmitting in the future must be carried out with the speed reducing.NAK_HOLD indication: former subgroup is not correctly decoded, and transmitting in the future can be carried out with present speed.
In the example of Figure 15, do not adopt NAK_STOP order, but it will be understood by those skilled in the art that and can introduce such order (or other order).And, for the various possibilities of the NAK_STOP that encodes (above detailed description), also can use together with F-EACKCH.
Person of skill in the art will appreciate that, the arbitrary collection by combine command (or its combination) can adopt many kinds of constellations, as described in detail herein.Constellation can be designed to various command, command history or command type that various level of protection (that is, the correct possibility receiving) are provided.
Figure 16 has illustrated the optional constellation that is suitable for using on F-EACKCH.This example has illustrated the migration that the speed of NAK order is controlled.Various ACK orders comprise ACK_HOLD, ACK_INCREASE, ACK_DECREASE and ACK_STOP.For above-described reason, null command (0,0) is assigned to NAK.In addition, can see that the distance between NAK and ACK order arbitrarily equates, and can be configured to any value, so that the error probability for NAK of hope to be provided.
It is charge-coupled that various various constellations can be designed to have the command set of desired characteristic.For example, NAK order can be assigned to the point of relatively drawing close together, and ACK order can be assigned to the point of relatively drawing close together, and these two groups may be separated with relatively large distance.By which kind of mode, although the order of a type in a group is thought by mistake to the possibility of another order in this group increases, the possibility of mistaking set type is reduced by relevant.Thereby ACK is seldom likely identified as NAK by mistake, vice versa.If reduce, increase or keep being identified by mistake, speed control command so subsequently can be used to compensation.(attention, the indication of increase, when reducing or keep being sent out, for example, may increase the interference to other channel in system).
Figure 17 has illustrated and has been adapted at the upper exemplary constellation of three-dimensional adopting of F-EACCH.Can be by using any three three-dimensional constellations of signal formation that are used for representing the amplitude on each axle.Or individual signals can be time-multiplexed, to be transmitted in the information of the one or more dimensions in very first time section, follow the information of the one or more additional dimension in one or more the second dimensions.Those skilled in the art will recognize that this can be extended to any number of dimensions.In an example, QAM signal and bpsk signal can be sent simultaneously.QAM signal can transmit x and y axis information, and bpsk signal transmits z axis information.Constellation generation technique is well-known in this area.
The example of Figure 17 further illustrates the concept to separate with NAK order by ACK command packet.What note is, relative distance between ACK_STOP, ACK_DECREASE, ACK_HOLD and ACK_INCREASE is less than the distance between any ACK order and NAK order (in this example, comprising NAK_HOLD, NAK_INCREASE and NAK_DECREASE).Like this, compared with rate command, travelling carriage seldom may be confirmed order by misinterpret.The principle that those skilled in the art can apply herein comprises the constellation of any command history with formation, simultaneously for setting is protected in order fifty-fifty, or protect distribution in the mode of wanting arbitrarily.
Figure 18 has illustrated the embodiment of method 750, for the treatment of the transmitting receiving at place, base station, comprises and is applicable to confirmation and the speed control that process 750 as above adopts.Wander back to, before process 750, base station has received former request (if yes), makes any allowance of wanting, and receives and permits and autonomous transmission, and carry out the scheduling that has comprised these and other factor.
This embodiment of process 750 starts from square frame 1810.The applicable allowance of wanting is arbitrarily made according to the scheduling of former execution in base station.In square frame 1820, generate ACK or NAK order to confirm former transmitting.Confirm order can with for expanding the command in combination of former allowance, get up or follow this order, or can get up or follow this order with the command in combination of controlling existing allowance (comprising the speed control of autonomous transmission) for speed.Any technology described here can be used to the signaling of square frame 1820, comprises the confirmation speed control signal of separated speed control and confirmation signal and combination.
In square frame 1830, ACK_STOP order can be sent out, with indicate travelling carriage should from before allowance pattern recovery to autonomous mode.In this example, ACK_STOP is also for guiding travelling carriage (that is, F-DRCCH) to be switched to and to monitor public speed control signal (that is, F-CRCCH) from monitoring special-purpose rate control channel.In optional embodiment, other order can be selected to the transfer that indication monitors to public rate control channel from special-purpose rate control channel.Particular command for this object can be defined.This particular command can also be incorporated on aggregate channel by the one or more points on use constellation, or it can be transmitted by signaling.In square frame 1840, one or more base stations provide confirmation for autonomous transmission subsequently.In square frame 1850, it is the speed that is used to revise the one or more travelling carriages that monitor public rate control channel that public speed is controlled in.Then this processing can stop.
Figure 19 has illustrated for responding the embodiment of the method 1900 of public and special-purpose speed control.Can adopt employing method 1900 in the travelling carriage of base station of public and special-purpose speed control combination in response, as above about as described in Fig. 7 and 18.This processing starts from decision block 1910.In this example, special-purpose speed is controlled together with permitting and is provided.At the travelling carriage of permitting operation under control, will not monitor public rate control channel.In optional embodiment, at the travelling carriage of permitting operation under control, also can be ordered to follow public speed control signal, or the travelling carriage not being allowed can be assigned with special-purpose rate control channel.These possibilities do not illustrate in Figure 19, but according to principle herein, those skilled in the art will adopt at an easy rate by using various signaling technologys such embodiment with and revise.In decision block 1910, if operated under the control of the former allowance of travelling carriage, advance to square frame 1940.
In square frame 1940,, travelling carriage supervision grant channel (that is F-GCH), is confirmed and rate control channel (as mentioned above, it can be F-ACKCH and F-DRCCH, or the F-EACKCH of combination).In square frame 1945, if ACK_STOP order is received, advance to square frame 1950.In this embodiment, as shown in square frame 1950, ACK_STOP is used to be assigned to the recovery of autonomous transmission.As below, by further describing, ACK_STOP also indicates from monitoring that special-purpose rate control channel is transformed into the public rate control channel of supervision.In optional embodiment, the order of non-ACK_STOP can be used to indication and monitor from special-purpose rate control channel the switching that public rate control channel monitors, and this order does not need with identical for returning to the order of autonomous transmission.After square frame 1950, this processing can stop.In the exemplary embodiment, when if desired, method 1900 will be repeated repeatedly.
In decision block 1945, if ACK_STOP is not received, advance to square frame 1955.In square frame 1955, travelling carriage can be launched according to the ACK/NAK that may be received, speed control and/or grant channel order.Then for current processing repeatedly, can stop.
Turn back to decision block 1910, if operated under the current control that there is no a former allowance of travelling carriage, advance to decision block 1915.In decision block 1915, if receive allowance on grant channel, the allowance transmitting that advance square frame 1920 basis receive, this processing thereafter can stop.Note, in this example, as mentioned above, permit being used to indicate travelling carriage will monitor special-purpose rate control channel.Therefore, subsequently to the repetition of method 1900 in, this travelling carriage will advance to square frame 1940 from square frame 1910, as mentioned above.In optional embodiment, can adopt and can selecting technology letter number notice to special-purpose speed, control the switching monitoring.
In decision block 1915, if permit not being received, travelling carriage monitors public rate control channel, as shown in decision block 1925.If public speed control command is published, advance to method 1930.Travelling carriage is adjusted speed the then speed autonomous transmission to revise according to public speed control command.Then this processing can stop.
If in decision block 1925, public speed control command is not received, and advances to square frame 1935.Travelling carriage can be then with present rate autonomous transmission.Then this processing can stop.
Figure 20 has illustrated the optional embodiment of method 750, and the method, for the treatment of the transmitting receiving, has comprised the confirmation and the speed control that are applicable to as mentioned above the use the same with process 750.This embodiment has illustrated the use to expansion acknowledgement channel (F-EACKCH) for combination confirmation and speed control.Wander back to, before process 750, base station has received former request (if any), makes the allowance of any hope, receives and permits and autonomous transmission, and carry out the scheduling that has comprised these and other factor.
This embodiment of process 750 starts from square frame 2005.The allowance of any hope is made in base station as applicable according to the scheduling of former execution, this process is explained in square frame 2010.In decision block 2015, ACK or NAK are determined in the transmitting that response received in the past.ACK or NAK, by being got up to provide the F-EACKCH of combination with speed control combination, below will describe in detail.
If ACK will be transmitted, advance to decision block 2020.If comprise that the speed control that maintains present rate (that is, ACK and continuation), by target MS desired (as determined in any scheduling of carrying out in former step), advances to decision block 2030.In decision block 2030, if expectation increases, advance to square frame 2035 and on F-EACKCH, send ACK_INCREASE.Then this processing can stop.If not expecting increases, in decision block 2040, determine whether minimizing is supposed to.If so, advance to square frame 2045 to send ACK_DECREASE on F-EACKCH.Then this processing can stop.If increase and reduce, be not supposed to, it is desirable keeping.Advance to square frame 2050 to send ACK_HOLD on F-EACKCH.Then this processing can stop.Note, these three ACK orders of controlling with speed are also used to the allowance before expansion.
In decision block 2020, if controlling, speed is not supposed to, on F-EACKCH, send ACK_STOP, as shown in square frame 2025.Then this processing can stop.While being utilized together with the such embodiment with explanation in such as Figure 18-19, for example, public and special-purpose speed is controlled and is all used in this case, and ACK_STOP can indicate travelling carriage from special-purpose speed, to control an example that monitors the order that is transformed into public speed control supervision.In this example, ACK_STOP stops any allowance in the past, and then travelling carriage will be transferred to autonomous transmission.
Turn back to decision block 2015, if ACK is not sent out, NAK is in upstate so.As mentioned above, exist multiplely for the possibility of speed being controlled and NAK combines, depend on whether NAK responds last subgroup.In optional embodiment, those possibilities also can be incorporated in method illustrated in fig. 20.In this example, if in decision block 2055, NAK does not respond last subgroup, advances to square frame 2060, to send NAK_HOLD on F-EACKCH.This order, as mentioned above, indication subgroup is not correctly decoded, and next subgroup can send with present rate.Then this processing can stop.
In decision block 2055, if NAK responds last subgroup, advance to decision block 2065.If expected rate is not controlled, advance to square frame 2060 to send NAK_HOLD on F-EACKCH, as described above.Note, in optional embodiment, additional order also can be merged in.For example, NAK_STOP can be used to send NAK to subgroup, the allowance before simultaneously abolishing.One of ordinary skill in the art will recognize that many other combinations of planting basis principle herein.
In decision block 2065, if controlling, speed is supposed to, advance to decision block 2070.If increased, be supposed to, advance to square frame 2075 to send NAK_INCREASE on F-EACKCH.Otherwise, advance to square frame 2085 to send NAK_DECREASE on F-EACKCH.Then this processing can stop.Note, in this example, default NAK, NAK_HOLD, as shown in square frame 2060, can reach from decision block 2065.If optional embodiment, comprises that the optional embodiment of NAK_STOP is used, can be used with the above-mentioned similar further decision of square frame 2040-2050 path, merge the feasible path that sends NAK_HOLD.
Figure 21 has illustrated for receiving and respond the method 2100 of F-EACKCH.In one embodiment, method 2100 can be in response according to being used in the travelling carriage of the base station of above-mentioned the whole bag of tricks transmitting, and above-mentioned the whole bag of tricks is included in those methods of explanation in Fig. 7,18 and 20.The method starts from square frame 2110, and in this square frame, travelling carriage monitors that grant channel is (that is, F-GCH) to determine whether allowance is received.
In square frame 2120, the subgroup sending before travelling carriage also responds monitors F-EACKCH.Then travelling carriage is according to the ACK on F-EACKCH or NAK indication transmitting or re-transmission.Emission rate is also modified according to any STOP, HOLD, INCREASE or DECREASE on F-EACKCH and the allowance receiving arbitrarily.Then this processing can stop.
Below further illustrate the various optional embodiment that comprises that public speed is controlled and special-purpose speed is controlled.
Travelling carriage in soft handover can monitor from all communities in active set, from its subset and only from the public speed of Serving cell, control.In one exemplary embodiment, if only at all F-CRCCH channel designators of the set of the community from being monitored during according to the licensed increase of speed, each travelling carriage just can increase its data rate.This may be convenient to improved interference management.As indicated with this example, due to the difference of the active set size of each travelling carriage in soft handover, their data rate may be different.Compared with F-DRCCH, F-CRCCH can be used to adapt to more processing gain.Like this, for identical transmitting power, it may be just more reliable inherently.
Wander back to, speed is controlled can be configured to public speed control (that is, the single designator in every sector), special-purpose speed controls (being exclusively used in single mobile station) or group speed is controlled (the one or more travelling carriages in one or more groups).According to which kind of speed control model selected (it can be indicated to travelling carriage by L3 signaling), travelling carriage can have the different rules for rate adaptation, wherein this rate adaptation is based on speed control bit, particularly based on RATE_INCREASE and RATE_DECREASE.For example, when being public speed control, rate adaptation can be random, and is to determine when it when being special-purpose speed control.According to principle herein, other various changes will be clearly.
Equally, in each above-mentioned example, supposed that it is every HARQ channel that speed is controlled.Namely, when travelling carriage receives positive acknowledgement or Negative Acknowledgement after last subgroup, travelling carriage is only noted speed control command, and determines the rate adaptation of transmitting next time on identical ARQ channel.Between the intergrade retransmitting, it can not note speed control command.Therefore the middle sending rate control order that, base station is not retransmitting.
For public speed, control or the control of group speed, the alternative of above rule is contemplated to.Particularly, base station can sending rate control order in the middle of retransmitting.Therefore, travelling carriage can accumulate the speed control command in the middle of retransmitting, and they are launched for grouping next time.In this example, we suppose that speed is controlled and remain every HARQ channel.But F-ACKCH and F-RCCH play two effects with the channel of independent operation.These technology can also be extended to the speed of all ARQ channels (or its subset) is controlled.
It should be noted, in above-mentioned all embodiment, various method steps can be exchanged and can not be departed from the scope of the present invention.Description disclosed herein refers to signal, parameter and the process relevant with 1xEV-DV system in many cases, but scope of the present invention is not restricted to this.Those skilled in the art can be easy to principle to be herein applied in other various communication systems.To those skilled in the art, these and other modification will be clearly.
One skilled in the art will appreciate that any one that can utilize a plurality of different process and technology comes performance information and signal.For example, data, instruction, order, information, signal, bit, symbol and the chip that may be mentioned in whole above explanation can be by voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light territory or light particle, or above combination in any shows.
Technical staff can further understand, the different described logic function block of illustrative combination embodiment disclosed herein, module, circuit and algorithm steps can be combined to realize by electronic hardware, computer software or the two.In order to clearly demonstrate the interchangeability of this hardware and software, above conventionally with the term description of function separately different illustrative components, functional block, module, circuit and step.This function is to be realized and being depended on the application-specific of whole system and design constraints by hardware or software.Those of skill in the art can realize described function in a different manner for each application-specific, but determining of this implementation method should not be interpreted as departing from protection scope of the present invention.
The combination that can be used for carrying out function described here with general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor-transistor logic circuit, discrete nextport hardware component NextPort or its design, realizes or carries out in conjunction with different illustrative logical blocks, module and circuit described in disclosed embodiment.General processor can be microprocessor, but substitute, this processor can be processor, controller, microcontroller or the state machine of any conventional.Processor also can be used as the combination of calculation element, for example, the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessors that are connected with DSP core, or other this configuration is implemented arbitrarily.
The method of describing in conjunction with the disclosed embodiments or the step of algorithm can directly be included in hardware, in the software module of processor operations, or above in the two combination.Software module can reside in RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or arbitrarily in other storage medium known in the art.An exemplary storage medium is connected on processor, makes like this processor can be from read information, or information is write on storage medium.Substitute, described storage medium can be integrated in processor.Processor and storage medium can reside in ASIC.ASIC can reside in user terminal.Substitute, processor and storage medium can be used as discrete component and reside in user terminal.
The above-mentioned explanation of disclosed embodiment makes any those skilled in the art can manufacture and use the present invention.To the different modification of these embodiment, to those skilled in the art, be apparent, in the situation that not deviating from the spirit or scope of the present invention, the rule that limited here can be used other embodiment.Therefore, the present invention does not intend to be limited to these embodiment described herein, and the present invention should have the widest scope conforming to principle disclosed herein and novel feature.
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|CN 200480029007 CN1864432B (en)||2003-08-05||2004-08-04||Combining acknowledgement and rate control|
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|CN 200480026624 CN100566443C (en)||2003-08-05||2004-08-04||Extended acknowledgement and rate control channel|
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