CN101043500B - Method for determining inverse data modulation coding mode and access terminal thereof - Google Patents
Method for determining inverse data modulation coding mode and access terminal thereof Download PDFInfo
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- CN101043500B CN101043500B CN200610082875A CN200610082875A CN101043500B CN 101043500 B CN101043500 B CN 101043500B CN 200610082875 A CN200610082875 A CN 200610082875A CN 200610082875 A CN200610082875 A CN 200610082875A CN 101043500 B CN101043500 B CN 101043500B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
- H04L1/0034—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter where the transmitter decides based on inferences, e.g. use of implicit signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
Abstract
The disclosed determining method for inverse data modulating way comprises: in a wireless access network, the access terminal determines self quality of inverse data channel according to the quality of inverse power-control reference channel, and determines the modulating and coding way for inverse data transmission. This invention can avoid scheduling error during the AN schedules AT, and reduces the effect on throughout of inverse data transmission.
Description
Technical field
The present invention relates to the terminal scheduling technology in OFDM (OFDM, the Orthogonal Frequency DivisionMultiplexing) system, especially relate to a kind of method for determining inverse data modulation coding mode and access terminal.
Background technology
Future mobile communication system mainly adopts OFDM (OFDM, Orthogonal FrequencyDivision Multiplexing) access mode, Long Term Evolution (LTE as the proposition of 3GPP tissue, Long Term Evolution) system and AIE (AIE, Air Interface Evolution) system etc. is all towards carrying out evolution based on the direction of OFDM multi-access mode (as OFDMA).In ofdm system, transmitting terminal with data symbol through inverse discrete Fourier transformer inverse-discrete (IDFT, Inverse Discrete FourierTransformation) is mapped to respectively on the different mutually orthogonal narrow-band sub-carriers after the processing, form the OFDM symbol again launches by being respectively each narrow-band sub-carriers pended cyclic prefix (CP, Cyclic Prefix); Though through after the airborne spread, to comprise the different multipath component of a plurality of time delays in the signal that receiving terminal receives, but receiving terminal can utilize discrete Fourier transform (DFT) (DFT, Discrete FourierTransformation) handles on each mutually orthogonal narrow-band sub-carriers, to extract each data symbol that transmitting terminal sends, and each multipath component will be finished equal gain combining automatically after DFT handles, and therefore make ofdm system have the ability of anti-multipath of instinct.Have good ability of anti-multipath, be easy to combine and clear superiority such as receiver structure is fairly simple just because of the OFDM technology, make it become the main multi-access mode that future mobile communication system adopts with multi-antenna technology.
In the OFDMA system, wireless access network (AN, Access Network) at each scheduling wireless access terminal (AT, Access Terminal) constantly, can be according to the current reverse channel quality of each AT, service quality (QoS, Quality of Service) priority, send information such as the size of data and current power, long and transmission rate of the grouping bag that corresponding AT distributed that determines whether dispatching corresponding AT and be defined as being scheduled or the like, and send assignment message by the AT that is scheduled to each and notify AT that correspondence is scheduled to send data according to the indication of AN.Wherein each AT can report AN with the current power information of self, the data size information that will send and QoS precedence information etc. according to corresponding temporal regularity, because AN has the reverse power control effect to AT, the reverse power control process is the reverse channel quality that AN needs constantly to measure AT, if measurement result is greater than a predetermined threshold value, then AN sends instruction notification AT and reduces transmitted power, with the power of saving AT and reduce interference that other AT is produced; If measurement result is less than this predetermined threshold value simultaneously, then AN sends instruction notification AT raising transmitted power, satisfies the transmission requirement of system with the reverse channel quality that guarantees AT.AN determines the reverse channel quality of each AT by the backward channel of measuring AT simultaneously, general for the relatively poor AT of reverse channel quality, AN can indicate AT to send data with lower transmission rate, and for reverse channel quality AT preferably, AN can indicate AT to send data with higher transmission rate.
As fully visible, at present in the process of AN scheduling AT, need AT to report more Overhead, need understand the current power information of AT such as AN, because the speed grade that AN is AT to be distributed is high more, the power that needs AT to have is big more, if and AN does not know the current power information of AT, then might cause to be that AT distributes higher transmission rate, and if the current power of AT itself can not be supported under the situation of transmission rate of AN distribution, then can have influence on the transfer of data of AT; AN also needs to understand the data size information that the current needs of the AT that is scheduled send, because the current data volume that need send of AT seldom, and AN has distributed higher transmission rate for it, then can cause the waste of transfer resource, and the current data of transmission that need of AT are more, and AN has distributed lower transmission rate for it, then can have influence on the transfer of data throughput of AT; AN also needs to understand the QoS precedence information of the current transmitting data service of AT in addition, well satisfy the QoS demand of different pieces of information business with this. therefore generally speaking, AT need report above-mentioned these Overhead to give AN, so that AN measures resulting reverse channel quality in conjunction with self to the AT backward channel simultaneously according to these Overhead that AT reports, the grouping bag that distributes for this AT when determining whether dispatching this AT and determining this AT of scheduling is grown and information such as transmission rate. and wherein AT is that mode by overhead channel or in-band signalling reports AN's with above-mentioned these Overhead, because handling and transmit these Overhead, AT all has time-delay, so receive these Overhead that AT reports at AN, determine whether to dispatch this AT and this AT based on these Overhead and be scheduled Shi Weiqi when distributing information such as transmission rate, variation all may take place in power information that this AT is current and the information such as size of data that need to send, therefore can bring the scheduling error for AN dispatches this AT, yet for the as far as possible little this scheduling error that reduces, just need AT constantly to report these Overhead, but will certainly have influence on the transfer of data throughput of AT backward channel like this.
Summary of the invention
The present invention proposes a kind of method for determining inverse data modulation coding mode, the scheduling error that is caused when solving AN scheduling AT in the prior art, and avoid influencing the throughput of backchannel data transmission.
The invention allows for a kind of accessing terminal accordingly.
For addressing the above problem, the technical scheme that the present invention proposes is as follows:
A kind of method for determining inverse data modulation coding mode comprises step:
In Radio Access Network, access terminal and determine the channel quality of self reverse data channel according to the channel quality of the reverse power control reference channel of access network indication; And
Channel quality and then definite modulation coding mode that transmission is adopted to reverse data according to the reverse data channel of determining.
Preferably, access network indicates the channel quality of reverse power control reference channel specifically to comprise for the process that accesses terminal:
Access network and access terminal between the adjusting step value of making an appointment;
The periodic indication of the channel quality of the reverse power control reference channel that access network will measure is accessed terminal; And
During indicating channel quality not according to the variations situation of the reverse data channel that accesses terminal, the step value that indication accesses terminal and increases or reduce described agreement;
Access terminal according to the indication of access network, increase or reduce the step value of described agreement on the channel quality of the reverse power control reference channel that receives in the last time.
Preferably, access network is according to the variations situation of reverse data channel, and indication accesses terminal to increase or reduce described agreement step value and specifically is meant:
When access network measured the frame error rate increase of the reverse data channel that accesses terminal, indication accessed terminal and reduces the step value of described agreement; And
When the frame error rate that measures the reverse data channel that accesses terminal reduced, indication accesses terminal increased the step value of described agreement.
Preferably, access terminal channel quality with the reverse power control reference channel of access network indication multiply by the channel quality of a predetermined bias as self reverse data channel.
Preferably, described predetermined bias is determined with respect to the gain of the unit transmission unit transmitting power of reverse power control reference channel by the unit transmission unit transmitting power of the reverse data channel that accesses terminal.
Preferably, described method also comprises step:
Access terminal based on the modulation coding mode of determining that transmission is adopted to reverse data, indicate frequency resource, determine the transmission rate of self reverse data to self in conjunction with access network.
Preferably, described method also comprises step:
Access terminal based on the reverse data transmission rate of determining at the reverse data channel transmitting data; And
The modulation coding mode of determining that transmission is adopted to reverse data is reported access network;
The modulation coding mode that access network reports according to accessing terminal carries out demodulating and decoding to inserting the next reverse data of terminal transmission.
Preferably, described method also comprises step:
The modulation coding mode that transmission is adopted to reverse data that to determine that accesses terminal reports access network;
Access network is defined as the frequency resource that respectively accesses terminal and distribute according to the modulation coding mode that respectively accesses terminal and report; And
To indicate accessing terminal respectively for the frequency resource of distributing that respectively accesses terminal to correspondence;
Access terminal based on the modulation coding mode of determining that transmission is adopted to reverse data, indicate frequency resource, determine the transmission rate of self reverse data to self in conjunction with access network.
Preferably, described method also comprises step:
Access terminal based on the reverse data transmission rate of determining at the reverse data channel transmitting data;
The modulation coding mode that access network reports according to accessing terminal carries out demodulating and decoding to inserting the next reverse data of terminal transmission.
Preferably, described method also comprises step:
The modulation coding mode that transmission is adopted to reverse data that to determine that accesses terminal reports access network;
Access network is defined as the frequency resource that respectively accesses terminal and distribute according to the modulation coding mode that respectively accesses terminal and report; And
Again be the new modulation coding mode of assignment that respectively accesses terminal;
The frequency resource that access network will distribute for respectively accessing terminal and indicate accessing terminal for the new modulation coding mode of the assignment that respectively accesses terminal to correspondence;
Access terminal and indicate new modulation coding mode, indicate frequency resource, determine the transmission rate of self reverse data to self in conjunction with access network to self based on access network.
Preferably, described method also comprises step:
Access terminal based on the reverse data transmission rate of determining at the reverse data channel transmitting data;
Access network carries out demodulating and decoding to inserting the next reverse data of terminal transmission for according to assignment the corresponding modulating coded system that accesses terminal.
Preferably, can recently identify the channel quality of channel based on the noise of channel.
A kind of accessing terminal comprises:
The channel quality determining unit is used at Radio Access Network, determines the channel quality of reverse data channel according to the channel quality of the reverse power control reference channel of access network indication;
The modulation coding mode determining unit is used for channel quality and then definite modulation coding mode that transmission is adopted to reverse data according to the definite reverse data channel of channel quality determining unit.
Preferably, described channel quality determining unit specifically comprises:
Storing sub-units is used for storing in advance a bias;
Channel quality buffer memory subelement is used for the channel quality of the reverse power control reference channel of the last indication of buffer memory access network;
The multiplication subelement is used for the channel quality of the reverse power control reference channel of channel quality buffer memory subelement buffer memory and the bias of storing sub-units storage are multiplied each other, and with the channel quality of multiplied result as reverse data channel.
Preferably, described channel quality determining unit specifically also comprises:
The step value storing sub-units, be used to store access network and access terminal between the adjusting step value of making an appointment;
Indication information receives subelement, the indication information that is used to receive the increase of access network indication or reduces described agreement step value;
Step value is regulated subelement, is used for receiving the indication information that subelement receives according to indication information, and the channel quality of the reverse power control reference channel of channel quality buffer memory subelement buffer memory is increased or reduce described agreement step value.
Preferably, described accessing terminal also comprises:
The first transmission rate determining unit is used for based on what the modulation coding mode determining unit was determined reverse data being transmitted the modulation coding mode that is adopted, and in conjunction with the frequency resource of access network indication, determines the transmission rate of reverse data;
First data transmission unit, the reverse data transmission rate that is used for determining according to the first transmission rate determining unit is at the reverse data channel transmitting data;
First modulation coding mode reports the unit, is used for the modulation coding mode that transmission is adopted to reverse data that the modulation coding mode determining unit is determined is reported access network.
Preferably, described accessing terminal also comprises:
Second modulation coding mode reports the unit, is used for the modulation coding mode that transmission is adopted to reverse data that the modulation coding mode determining unit is determined is reported access network;
The second transmission rate determining unit is used for the transmission rate of determining reverse data based on the new modulation coding mode and the frequency resource of access network indication;
Second data transmission unit, the reverse data transmission rate that is used for determining according to the second transmission rate determining unit is at the reverse data channel transmitting data.
The beneficial effect that the present invention can reach is as follows:
Technical solution of the present invention is by in the process of AN scheduling AT, AT is according to the channel quality of the current reverse power control reference channel of AN indication, from the employed spectrum efficiency of host computer reverse data, thus corresponding determine reverse data the modulation coding mode (MCS) that should adopt.Thereby make AT not need to report under the situations of Overhead to AN such as self current power, the size of data that will send and QoS priority, also can determine the transmission rate that the self transmission reverse data need use, therefore avoided because the scheduling error that propagation delay time caused of up Overhead makes AN can dispatch AT more accurately; Go back simultaneously and then reduced AT and the reverse transfer resource is too much taken the corresponding throughput of transmissions that improves the reverse transfer channel for reporting associated overhead information.
Description of drawings
Fig. 1 determines the main realization principle flow chart of method for inverse data modulation coding mode of the present invention;
Fig. 2 is AT realizes transmit ascending data according to the MCS information of determining the first embodiment processing procedure schematic diagram;
Fig. 3 is AT realizes transmit ascending data according to the MCS information of determining the second embodiment processing procedure schematic diagram;
Fig. 4 is AT realizes transmit ascending data according to the MCS information of determining the 3rd an embodiment processing procedure schematic diagram;
The concrete composition structured flowchart that accesses terminal that Fig. 5 proposes for the present invention;
Fig. 6 for the present invention access terminal in the concrete composition structured flowchart of channel quality determining unit;
Fig. 7 realizes that for the present invention accesses terminal first embodiment of transmitting uplink data forms structured flowchart;
Fig. 8 realizes that for the present invention accesses terminal second embodiment of transmitting uplink data forms structured flowchart.
Embodiment
In the mobile communication system of reality, AN is when carrying out reverse power control to AT, all be to be benchmark with a reference channel, such as reverse power control reference channel in DO Rev.A mobile communication system is Reverse Pilot Channel, and reverse power control reference channel is reverse channel quality indication (CQI, Channel Quality Indicator) channel in 802.02 mobile communication system.AT is carried out in the process of reverse power control at AN, AN constantly measures the channel quality of reverse power control reference channel, and calculate the signal to noise ratio (SNR of reverse power control reference channel according to the channel quality of the reference channel that measures, Signal to Noise Ratio), if the SNR that calculates is greater than default target SNR, then AN sends power control instruction to AT, and indication AT reduces the transmitted power of reference channel; Otherwise AN sends power control instruction to AT, the transmitted power of indication AT rising reference channel.
And the power of the actual reverse data channel of AT all is to multiply by a bias (Delta) to draw on the basis of reverse power control reference channel power, power such as the reverse power control reference channel of hypothesis is 1 milliwatt, and the bias of reverse data channel is 10, then the power of reverse data channel should be 10 times of reference channel power, and promptly the power of reverse data channel is 10 milliwatts.The purpose of reverse power control is to allow the channel quality of reverse power control reference channel maintain certain limit, even oppositely the SNR of power control reference channel maintains certain limit, so all AT can think that the transmission quality of self reverse data channel multiply by a bias on the SNR basis of reference channel also be stable, therefore AT is when being dispatched by AN, AT can be directly according to the transmission quality (being SNR) of the reverse data channel of self from corresponding self the reverse data transmission rate of host computer, and need not when being scheduled all current power information with self at every turn, data size information that need send and QoS precedence information etc. report AN and (but can take long Cycle Length to report these Overhead, only use) for AN dividing frequency resource, thereby avoided AN existing scheduling error when at every turn dispatching AT, and reduce AT reverse data channel transfer resource taken the corresponding throughput of transmissions that increases reverse data channel.
AT at every turn when being scheduled actual employed transmission sub-carrier resources all distribute by AN could guarantee that employed transmission subcarrier is mutually orthogonal between each AT because only distribute by AN.And the autonomous determined reverse data transmission rate of AT mainly be meant AT next time transmission grouping bag the spectrum efficiency that can reach, be the bit number that the every hertz of per second in every sector can transmit, correspondence reaches this reverse data transmission spectrum efficient AT that determines should select corresponding modulation coding mode (MCS:modulation andcode scheme).In the OFDMA system, spectrum efficiency can data quantity transmitted corresponding to each subcarrier, and spectrum efficiency is high more, and the data of transmitting on the unit transmission unit are many more.
At above-mentioned thought, the present invention proposes the method for determining inverse data modulation coding mode here, be explained in detail to the main realization principle of technical solution of the present invention, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
As shown in Figure 1, determine the main realization principle flow chart of method for inverse data modulation coding mode of the present invention, its main implementation procedure is as follows:
Step S10, in Radio Access Network, AT determines the channel quality (corresponding, the channel quality of AT reverse data channel also can identify based on SNR) of self reverse data channel according to the channel quality of the reverse power control reference channel of AN indication (oppositely the channel quality of power control reference channel can based on the SNR sign of reverse power control reference channel); Wherein AT is according to the channel quality of the indicated reverse power control reference channel of AN, on the channel quality basis of this reference channel, multiply by the channel quality of a predetermined bias (Delta) as self reverse data channel, the bias (Delta) that AT used in this process is mainly determined with respect to the gain of the transmitting power of reverse power control reference channel by the transmitting power of AT reverse data channel, also will be subjected to the actual maximum transmit power limit that can support of AT simultaneously.
Yet in the mobile communication system of reality, although because AN makes the channel quality (as SNR) of the reference channel of AT maintain certain domain of walker to the reverse power control effect of AT, but the channel quality of the reference channel of each AT (as SNR) might not be identical in the reality, and each AT also not necessarily can keep the channel quality value of self reference channel in domain of walker, but may change according to AT present position and the disturbed condition that is subjected to, this shows when AT is scheduled at every turn, in order to make AT can calculate reverse data transmission rate accurately, should be as the criterion and calculate with the channel quality (SNR_of_BaseChannel value when identifying) that current AT carry out reverse data reverse power control reference channel reality of when transmission, could guarantee that like this it is best that AT calculates the scheduling result and the transmission rate that obtain with SNR.Yet the channel quality value AT of reverse power control reference channel at that time is ignorant, therefore in actual mobile communication system, the channel quality value that AN can keep by overhead channel or the in-band signalling mode reverse power control reference channel that AT is current and the variations advisory of follow-up reverse power control reference channel thereof are given AT, AT just can according to the channel quality value of the reverse reference channel of AN notice and accordingly situation of change accurately calculated the transmission rate of self reverse data.
To sum up AN can come to indicate to AT accurately the channel quality of reverse power control reference channel by following processing procedure:
The adjusting step value of having made an appointment relevant between AN and the AT;
AT is given in the periodic indication of the channel quality of the reverse power control reference channel that AN measures self, and during indicating channel quality not according to the variations situation of AT reverse data channel, indication AT increases or reduces the step value of above-mentioned agreement; When for example the frame error rate that measures the reverse data channel of AT as AN increases, the step value of above-mentioned agreement will be indication AT reduced, and when the frame error rate of the reverse data channel that measures AT reduces, the step value of above-mentioned agreement will be indication AT increased;
The above-mentioned indication that AT issues according to AN, the step value that increases or reduce to arrange on the channel quality of the reverse power control reference channel that receives in the last time, thereby reach make AN scheduling will be at that time during AT accurately the channel quality value of reference channel indicate to AT, make AT accurately determine the channel quality of self reverse data channel based on the mass value of reference channel comparatively accurately, ask for accurate reverse data transmission rate and lay the foundation for follow-up, and this indicating mode can also reduce too much taking forward direction overhead channel transfer resource.
For example identify the channel quality of channel with the SNR value of channel, in the mobile communication system of reality, can carry the SNR_of_BaseChannel territory of reference channel by the mode of in-band signalling, the value in this territory is the target SNR that the reverse reference channel of the AT of default need be kept, because in-band signalling can transmit more information, but processing delay is bigger, so in-band signalling can adopt every some cycles and send a SNR_of_BaseChannel territory. the while is in conjunction with the mode of overhead channel indication, be used to indicate AT to increase or reduce to regulate the indication information of step value as designing a new overhead channel or using the resource assignation channel of having deposited to carry, because the characteristics of overhead channel are that processing speed is fast, but can not carry too to information, otherwise take too many transfer resource, influence the transmission of forward data, therefore can use 1 bit to identify the information that indication AT increases or reduce the associated adjustment step value here, when in overhead channel, indicating the information of giving AT to be " 0 " as AN, deduct the adjusting step value of making an appointment on the SNR value that expression indication AT received by the in-band signalling mode in the last time, and AN is when indicating the information of giving AT be " 1 " in overhead channel, adds the adjusting step value of making an appointment on the SNR value that expression indicates AT to receive by the in-band signalling mode in the last time.
It is AN notifies the AT reference channel at every turn by the in-band signalling mode signal to noise ratio occurrence, and transmit the signal to noise ratio situation of change that 1bit information is notified the AT reference channel by overhead channel, promptly the signal to noise ratio to reference channel increases or reduces certain step value, AT just can obtain the signal to noise ratio value that current reverse reference channel can be kept fast like this, and don't with taking too many forward direction expense, and the real-time of notice is also fine.The time interval that wherein concrete in-band signalling sends and the step value of increase or reduction can be consulted in advance to determine by AN and AT.
Step S20, AT calculates the transmission spectrum efficient of self reverse data according to the channel quality (as the SNR value of reverse data channel) of above-mentioned definite reverse data channel, just can determine reverse data is transmitted the MCS information that is adopted in the frequency efficiency process of calculating reverse data.
Here determine the SNR value of self reverse data channel according to the SNR value of the reference channel of AN indication with AT, and calculate the spectrum efficiency of self reverse data based on the SNR value of the reverse data channel of determining, thus determine that in the process of calculating the reverse data spectrum efficiency MCS information that transmission is adopted to reverse data is the calculated examples that example illustrates AT calculating reverse data spectrum efficiency:
According to the information theory shannon formula and " P.Hosein; " On the Optimal Scheduling of UplinkResources in OFDMA-Based Wireless Networks "; Proceedings of the 12thEuropean Wireless Conference; Athens; Greece; April 2006. " the document record, the present invention can draw here in the OFDMA system, Utopian spectrum efficiency ρ=beta * log10 (1+SNR), SNR is exactly the signal to noise ratio (being the SNR value of current reverse data channel) that can obtain on the unit transmission unit in the formula, in the mobile communication system of reality, spectrum efficiency need be adjusted by a constant (beta), and the SNR in its Chinese style equals:
Wherein DataPower is the performance number of reverse data channel on the unit transmission unit, and BasePower is the performance number of reference channel on the unit transmission unit.The physical significance of this formula is: when performance number is BasePower on reference channel unit's transmission unit, its signal to noise ratio that can keep is SNR_of_BaseChannel, then when the performance number on reverse data channel unit's transmission unit was DataPower, the signal to noise ratio that reverse data channel can access was SNR.As can be seen
Just in time equal the power bias value of reverse data channel mentioned above with respect to reference channel.Be AT when determining the SNR value of self reverse data channel, SNR value that be current according to reverse power control reference channel multiply by a bias on its basis
Draw, the transmitting power that this bias also will be able to be supported by the AT maximum is controlled.
By above-mentioned formula calculate obtain the SNR value of reverse data channel after, calculate by ρ=beta * log10 (1+SNR), just can draw the spectrum efficiency that each AT reverse data channel can obtain, in real system, may need these spectrum efficiencies are carried out certain quantification classification, promptly being summarized as the speed grade of the limited quantity of a cover. last AT determines that according to the sub-carrier resources that AN distributes to self corresponding reverse data transmission grouping bag is long, be the long PacketSize=ρ * T of the grouping bag * N of actual transmissions, T is the transmission time of reverse data in this formula, N is the number of subcarriers that AN distributes to AT. wherein AT determines in the frequency efficiency process of reverse data in said process, will inevitably find one group of corresponding MCS information as the mode that the reverse transfer data are modulated and encoded, so that the reverse data after the coded modulation reaches definite transmission spectrum efficient.
Follow-up, AT according to above-mentioned processing procedure after having determined the MCS information that reverse data transmission is taked, just can and then indicate frequency resource situation to self (AN can at the forward direction allocated channel directly to AT assigned frequency resource), come and then determine the transmission rate of self reverse data in conjunction with AN; AT at the reverse data channel transmitting data, and will report AN by the reverse rate indicating channel according to the MCS information that above-mentioned processing procedure is determined according to the reverse data transmission rate of determining; AN just can carry out corresponding demodulating and decoding processing by the MCS information reverse data that transmission comes to AT that the reverse rate indicating channel reports according to AT like this, handles thereby finish transmission of uplink data, and its concrete processing procedure as shown in Figure 2.
In addition, AT can also realize the transmission of uplink data processing by following processing procedure after having determined the MCS information that transmission is taked to reverse data, specifically please refer to Fig. 3:
1.AT the MCS information that transmission is adopted to reverse data that will determine reports AN by the reverse rate reporting channel;
2.AN according to the MCS information that each AT reports, be defined as the frequency resource that each AT distributes, and will indicate AT respectively for the frequency resource that each AT distributes to correspondence;
3.AT based on the MCS information of determining that transmission is adopted to reverse data, and indicate frequency resource, determine the transmission rate of self reverse data to self in conjunction with AN;
4.AT based on the reverse data transmission rate of determining in above-mentioned 3 at the reverse data channel transmitting data;
5, AN carries out the demodulating and decoding processing according to the MCS information reverse data that transmission comes to AT that AT reports in above-mentioned 1, handles thereby finish transmission of uplink data.Processing procedure among this Fig. 3 is compared with the processing procedure among Fig. 2, difference is that AT reports AN with the MCS information of determining earlier, the MCS information that is reported according to AT by AN is defined as the frequency resource that AT distributes, and then the frequency resource of determining indicated to AT, so that AT determines the transmission rate of reverse data again.
In order to determine the transmission rate of reverse data more accurately, AT can also realize the transmission of uplink data processing by following processing procedure after having determined the MCS information that transmission is taked to reverse data, specifically please refer to Fig. 4 in addition:
1) the MCS information that reverse data transmission is adopted that will determine of AT reports AN by the reverse rate reporting channel;
2) AN is defined as the frequency resource that each AT distributes, and is the new MCS information of each AT assignment again according to the MCS information that each AT reports;
3) frequency resource that will distribute for each AT of AN and indicate AT for the new MCS information of each AT assignment to correspondence;
4) AT indicates new MCS information to self based on AN, and indicates frequency resource to self in conjunction with AN, determines the transmission rate of self reverse data;
5) AT based on the reverse data transmission rate of determining at the reverse data channel transmitting data;
6) AN is according to above-mentioned 3) the corresponding MCS information of the middle finger dispensing AT reverse data that transmission comes to AT carries out corresponding demodulating and decoding and handles, handle thereby finish transmission of uplink data.
As fully visible, technical solution of the present invention can be implemented in the process of AN scheduling AT, AT is according to the channel quality of the current reverse power control reference channel of AN indication, and from the employed spectrum efficiency of host computer reverse data, correspondence is determined the modulation coding mode to reverse data adopted.And no longer need as prior art, AT needs the current power information of self, the data size information that will send and QoS precedence information etc. are reported AN, and then determine the transmission rate that AT transmission reverse data need use by AN, therefore avoided because the scheduling error that propagation delay time caused of up Overhead, make AN can dispatch AT more accurately, go back simultaneously and then reduced AT and the reverse transfer resource is too much taken the corresponding throughput of transmissions that improves the reverse transfer channel for reporting associated overhead information.
Method corresponding to the above-mentioned proposition of the present invention, the proposition that the present invention is also corresponding here a kind of accessing terminal, please specifically with reference to Fig. 5, this figure is the concrete composition structured flowchart that accesses terminal that the present invention proposes, it mainly comprises channel quality determining unit 10 and modulation coding mode determining unit 20, and wherein the concrete effect of these two component units is as follows:
Channel quality determining unit 10 is used at Radio Access Network, determines the channel quality of reverse data channel according to the channel quality of the reverse power control reference channel of AN indication;
Modulation coding mode determining unit 20 is used for channel quality and then definite modulation coding mode that transmission will be adopted to reverse data (i.e. the MCS information that transmission will be adopted to reverse data) according to above-mentioned channel quality determining unit 10 determined reverse data channel.
And then as shown in Figure 6, for the present invention access terminal in the concrete composition structured flowchart of channel quality determining unit, wherein the channel quality determining unit comprises that mainly storing sub-units 110, channel quality buffer memory subelement 120, multiplication subelement 130, step value storing sub-units 140, indication information receive subelement 150 and step value is regulated subelement 160, and wherein the concrete effect of each component units is as follows:
Storing sub-units 110 is used for storing in advance a bias;
Channel quality buffer memory subelement 120 is used for the channel quality of the last indicated reverse power control reference channel of buffer memory AN;
Step value storing sub-units 140 is used to store the adjusting step value of making an appointment between AN and the AT;
Indication information receives subelement 150, the indication information that is used to receive the indicated increase of AN or reduces to arrange step value;
Step value is regulated subelement 160, is used for receiving the indication information that subelement 150 receives according to above-mentioned indication information the step value that the channel quality of the reverse power control reference channel of channel quality buffer memory subelement 120 buffer memorys is increased or reduces to arrange;
Specifically please refer to Fig. 7, this figure is that the present invention first embodiment that realizes transmitting uplink data that accesses terminal forms structured flowchart, it is gone back on the main composition architecture basics of above-mentioned Fig. 5 and then comprises that the first transmission rate determining unit 30, first data transmission unit 40 and first modulation coding mode report unit 50, and wherein the main effect of each newly-increased unit is as follows:
The first transmission rate determining unit 30 is used for based on what above-mentioned modulation coding mode determining unit 20 was determined reverse data being transmitted the MCS information that is adopted, and in conjunction with the frequency resource situation of AN indication, determines the transmission rate of reverse data;
First data transmission unit 40, the reverse data transmission rate that is used for determining according to the first transmission rate determining unit 30 is at the reverse data channel transmitting data;
First modulation coding mode reports unit 50, be used for the MCS information that transmission is adopted to reverse data that modulation coding mode determining unit 20 is determined is reported AN, AN just can carry out the correlation demodulation decoding processing to the reverse data that transmits on first data transmission unit 40 according to the MCS information that first modulation coding mode reports unit 50 to report like this.
The MCS information that transmission is adopted to reverse data that above-mentioned in addition first modulation coding mode reports unit 50 earlier modulation coding mode determining unit 20 to be determined reports AN, AN and then according to MCS information that each AT adopted, be that each AT distributes corresponding frequency resource, and the frequency resource of distributing is indicated AT to correspondence; The first transmission rate determining unit 30 and then the MCS information of determining based on above-mentioned modulation coding mode determining unit 20 that transmission is adopted to reverse data, and, determine the transmission rate of reverse data in conjunction with the frequency resource situation that AN indicates; First data transmission unit 40, and then the reverse data transmission rate of determining according to the first transmission rate determining unit 30 is at the reverse data channel transmitting data; AN also can carry out the correlation demodulation decoding processing to the reverse data that transmits on first data transmission unit 40 according to the MCS information that first modulation coding mode reports unit 50 to report like this.
And then please refer to Fig. 8, this figure is that the present invention second embodiment that realizes transmitting uplink data that accesses terminal forms structured flowchart, it is gone back on the main composition architecture basics of above-mentioned Fig. 5 and then comprises that second modulation coding mode reports unit 60, the second transmission rate determining unit 70 and second data transmission unit 80, and wherein the concrete effect of each component units is as follows:
Second modulation coding mode reports unit 60, is used for the MCS information that transmission is adopted to reverse data that above-mentioned modulation coding mode determining unit 20 is determined is reported AN;
The second transmission rate determining unit 70 is used for the transmission rate of determining reverse data based on the new MCS information and the frequency resource allocation situation of AN indication;
Second data transmission unit 80, be used for according to the second transmission rate determining unit, 70 determined reverse data transmission rates at the reverse data channel transmitting data, AN just can carry out the correlation demodulation decoding processing to the reverse data that transmits on second data transmission unit 80 for the new MCS information of AT according to self indication like this.
In addition, other relevant concrete technology realization details that the present invention of this pass accesses terminal no longer give too much to give unnecessary details please specifically with reference to the associated description in the said method of the present invention here.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (17)
1. a method for determining inverse data modulation coding mode is characterized in that, comprises step:
In Radio Access Network, access terminal and determine the channel quality of self reverse data channel according to the channel quality of the reverse power control reference channel of access network indication; And
Channel quality and then definite modulation coding mode that transmission is adopted to reverse data according to the reverse data channel of determining.
2. the method for claim 1 is characterized in that, access network indicates the channel quality of reverse power control reference channel specifically to comprise for the process that accesses terminal:
Access network and access terminal between the adjusting step value of making an appointment;
The periodic indication of the channel quality of the reverse power control reference channel that access network will measure is accessed terminal; And
During indicating channel quality not according to the variations situation of the reverse data channel that accesses terminal, the step value that indication accesses terminal and increases or reduce described agreement;
Access terminal according to the indication of access network, increase or reduce the step value of described agreement on the channel quality of the reverse power control reference channel that receives in the last time.
3. method as claimed in claim 2 is characterized in that, access network is according to the variations situation of reverse data channel, and indication accesses terminal to increase or reduce described agreement step value and specifically is meant:
When access network measured the frame error rate increase of the reverse data channel that accesses terminal, indication accessed terminal and reduces the step value of described agreement; And
When the frame error rate that measures the reverse data channel that accesses terminal reduced, indication accesses terminal increased the step value of described agreement.
4. as claim 1,2 or 3 described methods, it is characterized in that the channel quality with the reverse power control reference channel of access network indication of accessing terminal multiply by the channel quality of a predetermined bias as self reverse data channel.
5. method as claimed in claim 4 is characterized in that, described predetermined bias is determined with respect to the gain of the unit transmission unit transmitting power of reverse power control reference channel by the unit transmission unit transmitting power of the reverse data channel that accesses terminal.
6. the method for claim 1 is characterized in that, also comprises step:
Access terminal based on the modulation coding mode of determining that transmission is adopted to reverse data, indicate frequency resource, determine the transmission rate of self reverse data to self in conjunction with access network.
7. method as claimed in claim 6 is characterized in that, also comprises step:
Access terminal based on the reverse data transmission rate of determining at the reverse data channel transmitting data; And
The modulation coding mode of determining that transmission is adopted to reverse data is reported access network;
The modulation coding mode that access network reports according to accessing terminal carries out demodulating and decoding to inserting the next reverse data of terminal transmission.
8. the method for claim 1 is characterized in that, also comprises step:
The modulation coding mode that transmission is adopted to reverse data that to determine that accesses terminal reports access network;
Access network is defined as the frequency resource that respectively accesses terminal and distribute according to the modulation coding mode that respectively accesses terminal and report; And
To indicate accessing terminal respectively for the frequency resource of distributing that respectively accesses terminal to correspondence;
Access terminal based on the modulation coding mode of determining that transmission is adopted to reverse data, indicate frequency resource, determine the transmission rate of self reverse data to self in conjunction with access network.
9. method as claimed in claim 8 is characterized in that, also comprises step:
Access terminal based on the reverse data transmission rate of determining at the reverse data channel transmitting data;
The modulation coding mode that access network reports according to accessing terminal carries out demodulating and decoding to inserting the next reverse data of terminal transmission.
10. the method for claim 1 is characterized in that, also comprises step:
The modulation coding mode that transmission is adopted to reverse data that to determine that accesses terminal reports access network;
Access network is defined as the frequency resource that respectively accesses terminal and distribute according to the modulation coding mode that respectively accesses terminal and report; And
Again be the new modulation coding mode of assignment that respectively accesses terminal;
The frequency resource that access network will distribute for respectively accessing terminal and indicate accessing terminal for the new modulation coding mode of the assignment that respectively accesses terminal to correspondence;
Access terminal and indicate new modulation coding mode, indicate frequency resource, determine the transmission rate of self reverse data to self in conjunction with access network to self based on access network.
11. method as claimed in claim 10 is characterized in that, also comprises step:
Access terminal based on the reverse data transmission rate of determining at the reverse data channel transmitting data;
Access network carries out demodulating and decoding to inserting the next reverse data of terminal transmission for according to assignment the corresponding modulating coded system that accesses terminal.
12. method as claimed in claim 4 is characterized in that, recently identifies the channel quality of channel based on the noise of channel.
13. one kind accesses terminal, and it is characterized in that, comprising:
The channel quality determining unit is used at Radio Access Network, determines the channel quality of reverse data channel according to the channel quality of the reverse power control reference channel of access network indication;
The modulation coding mode determining unit is used for channel quality and then definite modulation coding mode that transmission is adopted to reverse data according to the definite reverse data channel of channel quality determining unit.
14. as claimed in claim 13 accessing terminal is characterized in that, described channel quality determining unit specifically comprises:
Storing sub-units is used for storing in advance a bias;
Channel quality buffer memory subelement is used for the channel quality of the reverse power control reference channel of the last indication of buffer memory access network;
The multiplication subelement is used for the channel quality of the reverse power control reference channel of channel quality buffer memory subelement buffer memory and the bias of storing sub-units storage are multiplied each other, and with the channel quality of multiplied result as reverse data channel.
15. as claimed in claim 14 accessing terminal is characterized in that, described channel quality determining unit specifically also comprises:
The step value storing sub-units, be used to store access network and access terminal between the adjusting step value of making an appointment;
Indication information receives subelement, the indication information that is used to receive the increase of access network indication or reduces described agreement step value;
Step value is regulated subelement, is used for receiving the indication information that subelement receives according to indication information, and the channel quality of the reverse power control reference channel of channel quality buffer memory subelement buffer memory is increased or reduce described agreement step value.
16. as claimed in claim 13 accessing terminal is characterized in that, also comprises:
The first transmission rate determining unit is used for based on what the modulation coding mode determining unit was determined reverse data being transmitted the modulation coding mode that is adopted, and in conjunction with the frequency resource of access network indication, determines the transmission rate of reverse data;
First data transmission unit, the reverse data transmission rate that is used for determining according to the first transmission rate determining unit is at the reverse data channel transmitting data;
First modulation coding mode reports the unit, is used for the modulation coding mode that transmission is adopted to reverse data that the modulation coding mode determining unit is determined is reported access network.
17. as claimed in claim 13 accessing terminal is characterized in that, also comprises:
Second modulation coding mode reports the unit, is used for the modulation coding mode that transmission is adopted to reverse data that the modulation coding mode determining unit is determined is reported access network;
The second transmission rate determining unit is used for the transmission rate of determining reverse data based on the new modulation coding mode and the frequency resource of access network indication;
Second data transmission unit, the reverse data transmission rate that is used for determining according to the second transmission rate determining unit is at the reverse data channel transmitting data.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610082875A CN101043500B (en) | 2006-06-15 | 2006-06-15 | Method for determining inverse data modulation coding mode and access terminal thereof |
| PCT/CN2007/001565 WO2007147317A1 (en) | 2006-06-15 | 2007-05-15 | Mcs of reverse data determination method and access terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200610082875A CN101043500B (en) | 2006-06-15 | 2006-06-15 | Method for determining inverse data modulation coding mode and access terminal thereof |
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| Publication Number | Publication Date |
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| CN101043500A CN101043500A (en) | 2007-09-26 |
| CN101043500B true CN101043500B (en) | 2010-05-12 |
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| CN200610082875A Expired - Fee Related CN101043500B (en) | 2006-06-15 | 2006-06-15 | Method for determining inverse data modulation coding mode and access terminal thereof |
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| JP5203745B2 (en) * | 2008-02-26 | 2013-06-05 | 京セラ株式会社 | Wireless communication system and communication control method |
| US8520559B2 (en) * | 2008-04-02 | 2013-08-27 | Alcatel Lucent | Method for routing via access terminals |
| CN101686111B (en) * | 2008-09-28 | 2013-03-20 | 华为技术有限公司 | Method for issuing assignment information, device and communication system |
| CN101925204B (en) * | 2009-06-11 | 2012-12-12 | 上海无线通信研究中心 | Adaptive communication method of relay distributed link |
| CN106464645B (en) | 2014-03-28 | 2019-11-12 | 华为技术有限公司 | Sending device and receiving device and its method |
| CN105517172B (en) * | 2014-10-15 | 2019-05-31 | ***通信集团公司 | A kind of business scheduling method and device |
| CN111556569A (en) * | 2015-07-01 | 2020-08-18 | 华为技术有限公司 | Method and device for transmitting uplink data |
| US10231194B2 (en) | 2016-10-12 | 2019-03-12 | Qualcomm Incorporated | Reception of transmit power related information |
| WO2021088309A1 (en) * | 2019-11-04 | 2021-05-14 | 海信视像科技股份有限公司 | Display device and information prompt method |
| CN113300826B (en) * | 2021-07-26 | 2021-11-05 | 广州慧睿思通科技股份有限公司 | Communication method, communication device, equipment and computer storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1398069A (en) * | 2001-07-18 | 2003-02-19 | 华为技术有限公司 | Power control method in CDMA communication system |
| CN1428946A (en) * | 2001-12-28 | 2003-07-09 | 华为技术有限公司 | Method for obtaining down high-speed data transmission parameter in time division duplex system |
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| EP1424869B1 (en) * | 2002-02-07 | 2007-06-27 | Matsushita Electric Industrial Co., Ltd. | Radio communication apparatus and transfer rate decision method |
| CN100477561C (en) * | 2003-04-29 | 2009-04-08 | 三星电子株式会社 | Reverse power control method and apparatus in a mobile communication system in which mobile station determines reverse data rate |
| KR100964670B1 (en) * | 2003-05-12 | 2010-06-22 | 엘지전자 주식회사 | Method of generating data rate control bit in a mobile communication system |
| JP2005142923A (en) * | 2003-11-07 | 2005-06-02 | Matsushita Electric Ind Co Ltd | Radio communication equipment and mcs determination method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1398069A (en) * | 2001-07-18 | 2003-02-19 | 华为技术有限公司 | Power control method in CDMA communication system |
| CN1428946A (en) * | 2001-12-28 | 2003-07-09 | 华为技术有限公司 | Method for obtaining down high-speed data transmission parameter in time division duplex system |
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| WO2007147317A1 (en) | 2007-12-27 |
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