CN1846387A - Mobile-unit-assisted modulation management - Google Patents
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- CN1846387A CN1846387A CN 200480025518 CN200480025518A CN1846387A CN 1846387 A CN1846387 A CN 1846387A CN 200480025518 CN200480025518 CN 200480025518 CN 200480025518 A CN200480025518 A CN 200480025518A CN 1846387 A CN1846387 A CN 1846387A
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Abstract
The invention discloses a mobile-unit-assisted modulation scheme management, in which a mobile unit (100) performs signal quality measurements on a communications link (410), over which data modulated with a first modulation scheme is communicated. The mobile unit (100) determines a first link quality measure for this first modulation. Furthermore, the mobile unit (100) estimates second quality measure(s) for currently non-employed modulation scheme(s) based on this first quality measure. Selection information is then generated based on this first quality measure and the second quality estimate(s). This quality measure estimation is performed based on the capabilities and the particular modulation scheme versions of the mobile unit (100).
Description
Technical field
In general, the present invention relates to the modulation scheme management in the radio communications system, specifically, relate to the auxiliary modulation scheme management of mobile unit in this type systematic.
Background
Current radio communications system adopts certain modulation scheme usually, and wherein, intelligent carrying signal is added to and propagates on the carrier signal or be mixed into wherein.
For some communication systems that comprise GSM (global system for mobile communications) or GPRS (general packet radio service) system, the unique selection of available modulation scheme is GMSK (GMSK (Guassian Minimum Shift Keying)).GMSK is a kind of phase modulated of constant envelope, therein, transmits 0 or 1 and represents by changing phase place.Like this, the symbolic representation of each transmission is one.
EDGE (enhanced data-rates of GSM evolution) technology is introduced gprs system the another kind of modulation scheme that can be used for radio communication is provided, i.e. 8-PSK (8 attitude phase shift keying).8-PSK realize to use the channel architecture, channel width, current mechanism of the gprs system of GMSK and functionally uses again.But, the higher bit rate that each time slot permission of 8-PSK can be used than GMSK.8-PSK is a linear method, and it adopts phase place and amplitude modulation(PAM), and wherein, three continuous positions are mapped to a symbol.Though it is identical with GMSK that symbol rate keeps, at this moment each symbol represents three rather than one, thereby raw data rate is brought up to three times.
Can use EGPRS (the strengthening GPRS) system of GMSK and 8-PSK modulation can adopt nine different Modulation and Coding Scheme MCS1 to MCS9.Below four encoding schemes adopt GMSK, top five are then adopted 8-PSK.These nine MCS adopt different error correction, therefore are adapted at using under the different radio environment conditions.In general, in the good wireless electrical environment, more positive (less error correction, 8-PSK is relevant) encoding scheme can be used to the user data rate that provides higher, and, then usually adopt encoding scheme with more error correction (MCS that GMSK is relevant) and lower user data rate for the poor radio chain environment.
The link adaptation that the EGPRS system also adopts the link-quality controlled function to represent.Link adaptation adopts the radio link quality measurement result from mobile unit and/or base transceiver station, for down link and ul transmissions are selected optimal Modulation and Coding Scheme.Particularly for mobile unit, this measurement report only comprises link quality measurements result or estimation result, for example for the BEP (bit error rate) of employed modulation since last measurement report.But because the link quality measurements result depends on the concrete modulation scheme that is adopted, therefore, network must be made supposition to the relative performance of GMSK modulation and 8-PSK modulation.For example, if network receives the report of the BEP with that received by mobile unit and data by the GMSK modulation, then network this GMSK BEP " mapping " to estimating 8-PSK BEP value accordingly.
The subject matter of this prior art program is that single modulation scheme BEP mapping is used for all mobile units of system.But GMSK is different in the mobile unit from different manufacturers with the relative performance of 8-PSK modulation usually, and may be also different under every kind of radio environment.Therefore, network under certain conditions may be owing to this undesirable or wrong BEP modulation mapping selects not to be that the Modulation and Coding Scheme of the best is used to send to the data of mobile unit.
Summary of the invention
The present invention has overcome these and other defective of prior art proposal.
General objects of the present invention is that a kind of improved modulation scheme management is provided in communication system.
Another object of the present invention is the auxiliary management of mobile unit that modulation scheme selection is provided in communication system.
Another purpose of the present invention provides the more accurate decision information of using in the selection of modulation scheme of the mobile unit in the communication system.
Defined the present invention satisfies these and other objects by appended Patent right requirement.
In brief, the present invention relates to auxiliary generation of mobile unit of modulation scheme relevant link qualitative data on the basis of the modulation the data that are sent to mobile unit used with electing.In having used communication system of the present invention, mobile unit has a plurality of available modulation schemes, and they are used to modulate the data that the communication links between mobile unit and the base station is passed.Because the performance of different modulation schemes depends on radio environment, therefore, the Scheme Selection that is adopted will be based on the link quality measure of communication link., this link quality measure depends on the modulation scheme that is used for link.
According to the present invention, the communication link that mobile unit passes through for the data of transmitting the modulation of employing first modulation scheme is carried out signal quality measured.Mobile unit is determined first link quality measure of this first modulation then.The measurement of the link-quality of this first quality metrics and/or first modulation is used to estimate the respective link quality metrics of the subclass at least of other (current untapped) available modulation scheme by mobile unit.The estimation of this link-quality then can be carried out according to the concrete ability of mobile unit, particularly carries out according to the receiver algorithm of realizing in the particular type of modulation scheme and version and/or the unit.To represent with the central location in the communication system to have the different modulating ability usually and to adopt different modulation schemes and all of receiver algorithm version have been connected mobile unit and carry out the situation of this estimation and compare, this will produce accurate more quality metrics estimation.Mobile unit also produces selection information according to this first link-quality of the modulation scheme of current use and the second estimation link-quality of current untapped modulation.Selection information is reported in the communication system and carries out the selection of modulation scheme and (central authorities) unit of judgement for the mobile unit in the system.
Selection information can comprise definite link quality measure of different modulating.Perhaps, it only comprise one of quality metrics, normally with related the measuring of the modulation of current use, and comprise the amount that derives from link quality measure.Mobile unit or can be according to determining that quality metrics carry out modulation scheme selection voluntarily.In this case, selection information comprises selected thereby is the sign of currently most preferred modulation scheme.Selection information also can comprise the respective identification of the current preferred Modulation and Coding Scheme (MCS) related with selected modulation.
Estimation based on second link quality measure of first link quality measure of measuring and determining can realize by mapping of the quality metrics in the mobile unit or transfer process.For example, can in mobile unit, provide link-quality mapping or table.This tabular goes out the different link quality values of first modulation and the analog value of other modulation scheme.Mapping between the quality metrics is then searched as the table that adopts fixed first quality metrics and is carried out, so that obtain the estimation to second quality metrics.Perhaps, translation function can be used with first quality metrics as the input data, exports the respective quality of current untapped modulation then and measures.Table or function are preferably determined according to the concrete ability and the modulation scheme versions of mobile unit, and can be adopted the modulation hardware/software of laboratory measurement and simulation on mobile unit and/or unit to prepare.
Because different modulation schemes can be related with different transmitted power levels, the base station sends data preferably to mobile unit report power level or from the amount of its derivation to mobile unit.Then, this power data will be used for the estimation of second link quality measure, so that obtain more accurate estimation.
The base station is also configurable to be used for discontinuously or to transmit the data that adopt one of current untapped modulation scheme to modulate termly.This allows mobile unit also to carry out link quality measurements for the data that these schemes of employing are modulated.These measure the estimation that then is used for second link quality measure with first link quality measure jointly.
Mobile unit can be equipped with the link-quality enhancement algorithms, and it can be operated for the data that the particular subset that adopts certain modulation schemes or available solutions is modulated.When the The data certain modulation schemes rather than when adopting other scheme to modulate, this enhancement algorithms then can be improved the link-quality that mobile unit runs into.Mobile unit is preferably determined the performance gain (quality enhancing) that produces because of this algorithm.This gain is used to the estimation of second link quality measure, estimates more accurately so that obtain.
The invention provides following advantage:
The accuracy of-improvement estimation link quality measure current use and current untapped modulation scheme;
-allow network to select optimum modulation scheme for mobile unit at any time;
-enhancing user bit rate;
-improvement capacity of communication system; And
The seamlessly transitting between-promotion different modulation schemes.
By reading following description, will understand that other advantage provided by the invention to embodiments of the invention.
Summary of drawings
By with reference to the description of carrying out below in conjunction with accompanying drawing, can understand the present invention and other purpose and advantage admirably, accompanying drawing comprises:
Fig. 1 is the schematic overview of a part that can use the radio communications system of theory of the present invention;
Fig. 2 is a schematic block diagram, and an embodiment according to mobile unit of the present invention is described;
Fig. 3 is a schematic block diagram, illustrates in greater detail the link-quality estimation device of Fig. 2;
Fig. 4 is a schematic block diagram, and another embodiment according to mobile unit of the present invention is described;
Fig. 5 is a schematic block diagram, and another embodiment according to mobile unit of the present invention is described;
Fig. 6 is a schematic block diagram, and the link-quality that illustrates in greater detail Fig. 5 strengthens an embodiment of maker;
Fig. 7 is a schematic block diagram, and the link-quality that illustrates in greater detail Fig. 5 strengthens another embodiment of maker;
Fig. 8 is the schematic block diagram according to packet control unit of the present invention;
Fig. 9 is a flow chart, illustrates according to selection information generating method of the present invention;
Figure 10 is a flow chart, illustrates in greater detail the step of the estimation link-quality of Fig. 9;
Figure 11 is a flow chart, the additional step of the method for key diagram 9;
Figure 12 is a flow chart, the additional step of the method for key diagram 9;
Figure 13 is a flow chart, illustrates in greater detail an embodiment of the step that the generation link-quality of Figure 12 strengthens;
Figure 14 is a flow chart, illustrates in greater detail another embodiment of the step that the generation link-quality of Figure 12 strengthens; And
Figure 15 is a flow chart, the additional step of the method for key diagram 9.
Describe in detail
In all figure, identical reference number will be used for corresponding or similar element.
In current some radio communications systems, different modulation schemes or technology are used to modulate the data that transmit by system on Radio Communications Link.Under the situation of a plurality of available modulation schemes, the then common radio quality of the actual modulated Scheme Selection that use based on communication link.The present invention relates to carry out this modulation scheme selection.
Below with reference to using two kinds of possible modulation schemes, being that the present invention is described and disclosed to the radio communications system of GMSK (GMSK (Guassian Minimum Shift Keying)) and 8-PSK (8 attitude phase shift keying).But, the invention is not restricted to this actual selection of modulation scheme or can use the only communication system of two kinds of different modulation schemes, but a plurality of applicable to adopting, promptly at least two different modulation schemes are used to handle the general communication system of the data of transmitting by system, for example adopt CDMA (code division multiple access) system of QPSK (quadrature PSK), 16QAM (16 quadrature amplitude modulation) and 64QAM.
Fig. 1 is the schematic overview of a part that can use the radio communications system 1 of theory of the present invention.In Fig. 1, the unit that directly relates among the present invention only is described, so that simplify accompanying drawing.Radio communications system 1 may be GPRS (general packet radio) system or EGPRS (the strengthening GPRS) system that adopts EDGE (enhanced data-rates of GSM evolution) technology.
In general, communication system 1 comprise be provided to connect a plurality of base stations (BS) or the base transceiver station (BTS) 400,420 of the communication link of mobile unit 100.These base stations 400,420 are typically connected to base station controller (BSC) 300 or radio network controller (RNC) and controlled by it.This BSC 300 comprises the functional or unit 200 according to the modulation scheme of the communication link 410 of selecting to be used for mobile unit from the link quality measurements result of mobile unit 410 and/or base station 400,420 or estimation result again.Among the figure, this modulation scheme selection unit is without limitation by packet control unit (PCU) 200 expressions.
At work, mobile unit 100 is that (descending) communication link or channel 410 between the base station 400 related with it carried out signal or link quality measurements.According to these measurements, link quality measure is determined or estimates.But this fixed link quality measure depends on the modulation scheme that is used and is applied to the data of reception on link 410.Because the selection of the modulation scheme that will use on communication link is based on link-quality, and this link-quality depends on employed modulation scheme again, therefore, the respective link quality metrics of current untapped modulation scheme must be estimated, so that carry out correct Scheme Choice.
In the system of prior art, this estimation of the link-quality of untapped modulation scheme is carried out in PCU 200, and according to the present invention, it is carried out in mobile unit 100 and by mobile unit 100.As described in the background section, adopt and to produce non-optimal selection based on the mapping of central PCU or conversion between the link-quality of different modulation schemes the modulation scheme of mobile unit.This is because the relative performance of different modulation schemes is all had any different with different producers for different mobile unit types usually.And determine that by what be implemented in the relevant link-quality of modulation in the mobile unit 100 the actual performance difference between the concrete ability of that mobile unit 100, for example modulation scheme and the receiver algorithm will be considered during the link-quality mapping.Therefore, will carry out selecting more accurately of modulation scheme.
Fig. 2 is the schematic block diagram according to an embodiment of mobile unit 100 of the present invention.Mobile unit 100 comprises input and output (I/O) unit 110, is used for communicating with external unit and station.These I/O unit 110 concrete configurations are used for receiving the radio blocks with modulating data from the base station that mobile unit 100 is connected to.
Radio link measuring unit 120 preferably each is received burst or radio blocks is carried out the link measurement, and produces first link quality measure according to these measurement results.Perhaps, measuring unit 120 is configurable to be used for discontinuously or regularly carrying out signal measurement, for example every one the radio blocks that receives or every 100ms or other certain all period interval.
First link quality measure of the modulation scheme of current use can be expressed with other certain signal or the link quality measure that use bit error rate (BEP) or this area.
In a preferred embodiment of the invention, link quality measure be for a plurality of receive burst or for the average quality in cycle preset time measure, average BEP for example.It may be that the radio blocks that receives to different adopts the weighted average of different weights to measure that this average quality is measured.
In this case, the weight of using in the measurement result relevant with the radio blocks of nearest reception then is preferably more than the respective weights of the radio blocks that early receives.Therefore, the weighted average link quality measure should as far as possible accurately reflect the current wireless electricity quality environment and the situation of communication link.
Though radio link measuring appliance 120 has been described as determining or estimating a link quality measure of first modulation scheme of current use, this measuring appliance 120 also can be determined a plurality of link quality measure related with this first modulation scheme.For example, measure the coefficient of variation that can comprise average BEP and BEP, they two all depend on employed modulation scheme.Therefore, in the present invention, when discussing modulation scheme relevant link quality metrics, this comprises that also a plurality of (being correlated with) related with given modulation scheme measure.
The present modulation scheme of using of supposition communication link is GMSK below, and therefore, radio link measuring appliance 120 will be determined GMSK relevant link quality metrics.Like this, current untapped modulation scheme then is 8-PSK in this example.But this should only regard illustrative example as, and the present invention is also applicable to the current situation that is used to be sent to the down link data of mobile unit 100 of wherein 8-PSK or other certain modulation scheme.
Link-quality evaluation unit or estimation device 130 are provided in mobile unit 100, are used to estimate the respective link quality metrics that do not use modulation scheme, promptly are 8-PSK relevant link quality metrics in this example.These estimation device 130 configurations are used for estimating 8-PSK relevant link quality metrics according to radio link measuring appliance 120 determined GMSK relevant link quality metrics and/or according to the GMSK relevant link quality measurements that obtains from this measuring appliance 120.
If radio communications system can adopt modulation schemes different more than three kinds or three kinds, estimate then that device 130 is configurable to be used for for these operational version at least a and preferably estimate modulation scheme relevant link quality not for all that scheme.
In first embodiment, 130 configurations of link-quality estimation device are used for producing the respective link quality metrics of 8-PSK modulation when modulation has been finished for GMSK at measuring appliance 120.This means,, estimate then that device is measured according to GMSK to produce the relevant BEP value of 8-PSK if the GMSK correlated measure is expressed as BEP.Correspondingly, if the GMSK metric table is shown the average BEP and the coefficient of variation, estimate that then device 130 produces the relevant average BEP of 8-PSK and the coefficient of variation.
In an alternative, radio blocks or the data that adopt 8-PSK to modulate are transmitted discontinuously or regularly in the base station that mobile unit 100 is connected to, and should be used even GMSK is current, and vice versa.But, if the current GMSK that is modulated to then has the higher 8-PSK of transmission discontinuously piece by losing probability than corresponding GMSK piece and may cause mobile unit (100) can not detect these 8-PSK pieces.By the base station selected the most suitable Modulation and Coding Scheme (MCS) related, for example have the MCS5 of the losing probability lower, can alleviate this problem than the relevant MCS (MCS6-9) of all the other 8-PSK with 8-PSK.
By certain 8-PSK modulating data is provided, can carry out the 8-PSK measurement of correlation to it by measuring appliance 120 then, 120 of measuring appliances are transmitted to estimation device 130 to this class measurement result.Then, this link quality measurements device 130 adopts GMSK relevant link qualitative data and these 8-PSK from measuring appliance 120 to measure in the process of determining corresponding 8-PSK relevant link quality metrics.Like this, this link-quality estimation is provided usually than the more accurate estimation of the measurement of only adopting other modulation scheme based on the actual measured results of given modulation scheme.Can directly realize this comprising of the radio blocks of modulating by current non-optimum modulation scheme in order to produce more accurate link quality measurements downlink communication.For example, under the situation of GPRS and EGPRS mixing, adopt every usually X the piece of transmission of GMSK to be used, wherein X is the positive number, for example four greater than 1, even when using 8-PSK so that realizing that Uplink State Flag (USF) that mobile unit carries out is decoded.
In yet another embodiment, 130 configurations of link-quality estimation device are used for the GMSK that untapped 8-PSK link-quality produces than current use is modulated still less measuring of details.For example, if be expressed as the average BEP and the coefficient of variation from the GMSK link quality measure of radio link measuring appliance 120, it may be the BEP value that then corresponding 8-PSK measures.Perhaps, single 8-PSK correlation can be used to represent the interval of GMSK link quality values.For example, if determined that the GMSK correlated measure is in interval X
1＜GMSK measures＜X
2In, X
1＜X
2Be real number, estimate accordingly that then the 8-PSK correlated measure should be Y
1If, and X
2＜GMSK measures＜X
3, Y then
2Should be selected as the 8-PSK correlated measure, X
3, Y
1, Y
2Be real number.
In some communication systems, to compare with the piece that is used for the 8-PSK modulation, different maximum transmit power level can be used for the radio blocks of GMSK modulation.A reason may be that the non-linearity of power amplifier in the base station transmitter is more serious for 8-PSK usually.The base station then can be to the used power level of mobile unit 100 report GMSK and the corresponding level of 8-PSK.Perhaps, can transmit the quantity of power that from these power levels, derives, for example GMSK power level and the ratio of 8-PSK power level, their difference or other certain amount from wherein deriving to mobile unit 100.130 configurations of link-quality estimation device are used for adopting institute's received power data or amount in the estimation of 8-PSK relevant link quality metrics, and this will produce more accurate estimated value.
Estimate that from the GMSK relevant link quality metrics of radio link measuring appliance 120 and from link-quality the corresponding 8-PSK relevant link quality metrics of device 130 then is forwarded to selection information generating unit or maker 140.This unit 140 produces selection information according to the quality metrics of these receptions.Which kind of modulation scheme will be this information will constitute will be used for the selection of down link of mobile unit 100 or the basis of judgement.
If the modulation scheme relevant link quality metrics that each received consists essentially of a plurality of values, for example mean value and variance yields, then maker 140 can be configured to consider all these values in information generates or only considers one of them or its subclass, the average BEP value of corresponding modulation scheme for example.
Selection information can comprise that then (two) from measuring appliance 120 and estimation device 130 have determined modulation scheme relevant link quality metrics.Perhaps, information comprises the link quality measure (from measuring appliance 120) of the modulation scheme of current use and the amount that derives from link quality measure, for example GMSK measure the difference measured with 8-PSK or ratio, perhaps allow to adopt GMSK in the selection information to measure other certain amount of determining that 8-PSK measures.
The selection information that is produced then preferably adopts I/O unit 110 to be sent to and represents in the communication system and connected the external unit that mobile unit is carried out the selection of modulation scheme, for example PCU of Fig. 1.Therefore, the basis of this judgement and selection course in the selection information formation external unit.
Well known in the art, each is related with the different modulating and the encoding scheme (MCS) that are used for the aerial digital coding that transmits of system for two modulation scheme 8-PSK and GMSK.For the selection of modulation scheme, the actual selection of suitable MCS is depended on that usually radio link quality measures.This means that as a supplement or substitute, selection information can be used for selecting being used for the suitable MCS on the down link of mobile unit 100.
140 configurable being used for of selection information maker are transmitted this information to external unit (PCU) discontinuously or regularly via I/O unit 110.As an alternative or supplement, selection information can report to PCU when the report request that receives from PCU.
Link-quality estimation device 130 and selection information maker 140 and possible radio link measuring appliance 120 can be realized in the information generating unit 190 of configuration in being suitable for mobile unit 100 and operation.
The unit 110 to 140 of mobile unit 100 can be embodied as software, hardware or its combination.
This mobile unit assisted modulation Scheme Choice helps communication network to select optimum modulation scheme at any time, thereby improves user's bit rate and power system capacity.Even between the report information incident, only used one of modulation scheme, also reported that the two this embodiment of the present invention of 8-PSK relevant link quality and GMSK relevant link quality also helps more seamlessly transitting between the modulation scheme.
Fig. 3 is the schematic block diagram that the link-quality of Fig. 2 is estimated an embodiment of device 130.This estimation device 130 comprises link-quality mapping or table 134, and it lists different 8-PSK and GMSK link quality values.Mapping or conversion between this table 134 permission different modulating correlated quality value.Therefore, for given GMSK mass value, table 134 comprises corresponding 8-PSK value, and vice versa.This means, when the link-quality mapping processor 132 in estimating device 130 receives from the GMSK link quality measure of measuring and determining of radio link measuring appliance, processor 132 is carried out in table 134 and is searched, and retrieves corresponding 8-PSK link quality measure.
Table 134 can be embodied as comprise that for the same detailed quality metrics of two kinds of modulation schemes for example, measure if average BEP and variance thereof are used to retrieve corresponding 8-PSK, relevant BEP of then average 8-PSK and variance can obtain from table 134.Perhaps can retrieve the less value of details compared with mean value and variance yields, for example only single BEP.Under the situation of available modulation scheme more than two, some tables 134 can realize that perhaps single 134 can list the different link quality values of all schemes in estimation device 130.
Perhaps, table 134 is omitted, and processor 132 adopts link-quality mapping or transfer algorithm or function.This function then have GMSK relevant link quality and/or from the GMSK measurement of correlation result of radio link measuring appliance as input parameter, and export corresponding 8-PSK correlated quality and measure.Other input parameter, for example also can be used in this function, measure so that obtain more accurate estimation 8-PSK about the radio blocks that receives from the interruption of base station and/or the 8-PSK measurement result of power level data.If measuring by two values, GMSK represents, then exportable single or two the 8-PSK values of this function.Same function can be used for the GMSK value is converted to 8-PSK value and opposite operation, and this may be feasible.As an alternative or supplement, if two above modulation schemes are possible, then some different transfer functions can be realized in processor 132.
Mapping table 134 and/or function preferably produce according to the ability of mobile unit, particularly produce according to adoptable receiver algorithm in the particular type of modulation scheme and version and the mobile unit.This table or function can produce according to modulation software and/or the hardware realized in simulation on standard laboratory measurement and/or the mobile unit or the unit.This mobile unit adaptation link-quality conversion that has for different modulation schemes has strengthened the link-quality estimation, and all types of mobile units that are compared in the communication system adopt the method for the central mapping function in the networks to produce more accurate selection information.
Therefore, processor 132 configuration be used for receiving from other unit of mobile unit or from the GMSK of external unit measure and possible other input data, as 8-PSK measurement result and power level amount, and utilize their to produce estimation 8-PSK link quality measure.
In the first embodiment of the present invention, table 134 or function configuration are used to consider the possible different transmitted power level of GMSK and 8-PSK modulation.This means that table 134 can be listed some 8-PSK values for each GMSK value, but corresponding to the different value of power level amount.Perhaps, in case retrieved the 8-PSK value from table 134, processor 132 can be revised this value according to the power level amount.
The unit 132 of link-quality estimation device 130 can be embodied as software, hardware or its combination.Unit 132 and table 134 all can be realized in estimation device 130.But distributed realization also is feasible, wherein provides unit 132 and/or table 134 on other position of mobile unit.
Fig. 4 is a schematic block diagram, and another embodiment according to mobile unit 100 of the present invention is described.I/O unit 110, radio link measuring appliance 120 and link-quality estimate that device 130 is similar to the corresponding units among Fig. 2, and this paper does not do further argumentation.
In addition, except suitable modulation scheme, selector 160 is also configurable to be used to select modulation and the encoding scheme that will use on communication link.This selection is the operation of 150 pairs of input link quality metrics of device based on the comparison also.As an alternative or supplement, 160 of selectors can produce notice or the sign of selected MCS.
This sign (or a plurality of sign) then is sent to selection information maker 140.Therefore, in this embodiment of the present invention, modulation scheme that mobile unit 100 execution own will be used and/or the selection of MCS, and the selection information that is sent to PCU then comprises result from this selection, is one or more signs.PCU can select the institute from mobile unit 100 receive in reporting the modulation scheme of advising and/or MCS be used for communication link between unit 100 and the base station.
In addition, selection information also can comprise link quality measure as described above in connection with Figure 2.Reception has the unit (PCU) of the report of selection information then may carry out similar link-quality comparison and modulation scheme and MCS selection alternatively.The PCU suggestion is different from the modulation scheme of mobile unit 100 and/or another selection of MCS, and this may be feasible.This may since PCU have the right to visit the additional input data of mobile unit 100 inaccessibles, as the power level data, make PCU can carry out more accurate selection.
Therefore, in this embodiment, except link-quality estimation device 130, select information maker 140 and the possible radio link measuring appliance 120, information generating unit 190 also can comprise link-quality comparator 150 and modulation scheme selection device 160.
The unit 110 to 160 of mobile unit 100 can be embodied as software, hardware or its combination.
Fig. 5 is the schematic block diagram according to another embodiment of mobile unit 100 of the present invention.I/O unit 110, radio link measuring appliance 120 and link-quality estimate that device 130 is similar to the corresponding units among Fig. 2, and this paper does not do further argumentation.
This mobile unit 100 embodiment can use link-quality enhancement algorithms or unit 170, and it is applicable to the data that the subclass that adopts available modulation scheme is modulated.For example, link-quality enhancement algorithms 170 only can be worked to the GMSK modulating data, but then can not work for the 8-PSK modulating data.This enhancement algorithms 170 allows to use given modulation schemes usually, even under originally because of the impossible radio condition of low excessively link-quality.This means that algorithm 170 can strengthen at the link-quality that uses on the communication link that mobile unit 100 runs into during one of modulation scheme or its subclass.For example, enhancement unit 170 can have interference rejection capability or be used for that link-quality strengthens other certain functional.
Because quality enhancement algorithms 170 is only applicable to the subclass of available modulation scheme, therefore, it will influence this/link quality measure of these modulation schemes, still can not influence usually for other modulation.This means,, then may select non-best modulation if do not consider that in the modulation selection course gained link-quality strengthens.
In addition, the gain of enhancement algorithms 170 or performance also may depend on the actual wireless electrical environment, for example depend on quantity and the relative intensity and/or the traffic load of interference signal.This means that if do not use current link-quality gain or enhancing, it will be more unreliable then selecting.
The limiting examples of applicable this class link-quality enhancement algorithms 170 is that single antenna interference eliminated (SAIC) and single antenna disturb inhibition (SAIR) according to the present invention.
For example, current SAIC algorithm only provides performance gain when carrier wave or link are modulated by GMSK.In addition, the quantity and the relative intensity that greatly depend on interference signal from the gain of SAIC.This means that some SAIC algorithms can improve the GMSK performance any degree between 0 to 9dB at present, depend on radio environment and used SAIC algorithm versions.Therefore, if do not use the SAIC gain in selection course, then the uncertainty of the relative performance between GMSK and the 8-PSK reaches 9dB.Therefore, do not understand the SAIC performance and then be difficult to carry out accurate modulation scheme selection.
As an example of possible problem, consider that current selected MCS wherein is the downlink transmission of GMSK modulation.Suppose that also radio environment is fit to SAIC, and C/I is high enough to provide from mobile unit and shows extremely high quality Link Quality Reports, promptly to network or the extremely low GMSK BEP of PCU report.Do not know that SAIC is that the PCU that hangs down the major reason of GMSK BEP will be transformed into 8-PSK.Because SAIC does not provide gain for 8-PSK modulation, therefore will there be many mistakes, and receive from the new Link Quality Reports of mobile unit and before recognizing this situation and being transformed into the GMSK modulation again, may lose for many at PCU.May there be the conversion (ping-pong) back and forth in a large number between the modulation, under worst case, causes about 50% piece to be retransmitted.
Therefore, link-quality strengthens maker or generation unit 180 is preferably realized in mobile unit 100, is used for determining that the quality that operation produced of algorithm 170 strengthens.Maker 180 is defined as resulting performance gain to this enhancing usually.This may be for a plurality of radio blocks or for the average gain of certain time cycle, for example average gain since last measurement report is generated and is sent to PCU.
Because enhancement algorithms 170 is activated in some bursts usually and is deactivated in other bursts, therefore, mobile unit 100 can only be selected estimation to have from all that adopt the modulation scheme modulation related with algorithm and receive the link-quality of enhancing gain of burst and the link-quality that does not only gain from the enhancing of these deactivated bursts of algorithm wherein.These two kinds of link-qualities then can be used to determine the performance gain of algorithm 170.
The GMSK relevant link quality metrics of determining when perhaps, information comprises 8-PSK relevant link quality metrics, the GMSK relevant link quality metrics of determining and do not use link-quality enhancement algorithms 170 when link-quality enhancement algorithms 170 activates.
As mentioned above, in case selection information determines that by maker 140 it just is included in by I/O unit 110 and sends in the measurement report of PCU.The theory of this embodiment of mobile unit 100 also can combine with the embodiment in conjunction with the described mobile unit of Fig. 4.Like this, mobile unit 100 strengthens according to the link quality measure of having measured and having estimated and fixed link-quality and selects suitable modulation scheme.
In this embodiment, except link-quality estimation device 130, select information maker 140 and the possible radio link measuring appliance 120, information generating unit 190 comprises that also link-quality enhancement algorithms 170, link-quality strengthen maker 180.
The unit 110 to 140 and 170 to 180 of mobile unit 100 can be embodied as software, hardware or its combination.
Fig. 6 is the schematic block diagram that the link-quality of Fig. 5 strengthens an embodiment of maker 180.In this embodiment, the link-quality of modulation scheme that can use enhancement algorithms is not determined when having activation algorithm and when having the operation of algorithm.This means, hereto/these modulation schemes, generally determine two link quality measure, therein, when algorithm activates determined one normally better one promptly, is less when metric table is shown BEP.Link-quality comparator or comparing unit 182 are realized in strengthening maker 180, are used for these two kinds of link quality measure of comparison modulation scheme.Link-quality strengthens the ratio that can be expressed as the difference between the quality metrics or be expressed as them.
The unit 182 that link-quality strengthens maker 180 can be embodied as software, hardware or its combination.Unit 182 can be realized in maker 180.But distributed realization also is feasible, wherein provides unit 182 on other position of mobile unit.
Fig. 7 is the schematic block diagram that the link-quality of Fig. 5 strengthens another embodiment of maker 180.This embodiment comprises algorithm activate counter 184.As mentioned above, the link-quality enhancement algorithms is activated for burst or the radio blocks that some received usually, but for other bursts or radio blocks then is not.For example, SAIC may be activated for receive to some extent GMSK modulation radio piece.But because the external radio environment condition, SAIC can not produce any performance at it usually and strengthen or can make in the situation that link-quality degenerates deactivated.By calculating it has been activated the quantity of the possible radio blocks of algorithm, counter 184 can be determined activity ratio.This ratio for example may be defined as to its activated algorithm radio blocks quantity divided by piece that in fact originally can activation algorithm to it, be in the SAIC situation receive the sum of GMSK piece to some extent.
Activity ratio may be (roughly) indication that the link-quality that produces of algorithm strengthens.Activity ratio also may adopt alternatively by the data of the resulting average performance gain of operation of algorithm and replenish, so that the more accurate quality of definition strengthens.Perhaps, may carry out laboratory measurement, so that determine on an average certain activity ratio is corresponding to what performance gain.For example, 75% activity ratio may be used for representing the gain of 7dB, perhaps given average gain, may be represented by interval, for example 100-75% of activity ratio as 7dB.This means that if counter 184 determines that ratio is 83%, then algorithm produces the link-quality enhancing of 7dB in this illustrative example.
The unit 184 that link-quality strengthens maker 180 can be embodied as software, hardware or its combination.Unit 184 can be realized in maker 180.But distributed realization also is feasible, wherein provides unit 184 on other position of mobile unit.
On behalf of mobile unit in the network, Fig. 8 carry out the schematic block diagram of unit 200 of the selection of modulation scheme.Among the figure, this unit is without limitation by packet control unit 200 expressions.PCU200 comprises I/O unit 210, is used to carry out and the communicating by letter of external unit.I/O unit 210 concrete configurations are used to receive the links quality measurement reports from the mobile unit that is connected with communication system.
Optional measurement request generator 220 realizes in PCU 200, is used to produce the request message that I/O unit 210 may send mobile unit via the base station to.Maker 220 is configurable to be used for discontinuously or regularly producing these reports.But if mobile unit transmits this classes report and the request that need not to be received from trend PCU 200, then this maker 220 can omit from PCU 200.
Selector 230 also configurable being used for selected MCS according to selection information.
If the selection information that receives be not by mobile unit according to the power level Consideration, be that the transmitted power level of base station may the different facts produce for different modulation scheme, selector 230 can adopt this power data in selection course.Optional power command maker 240 sends to base station with mobile unit communication to the power level request.This request requires the base station to return the power level data to PCU 200.230 of selectors can be revised link quality measure from mobile unit according to this institute received power data, so that obtain more accurate quality metrics, thereby realize more accurate modulation scheme selection.
As a supplement or substitute, power command maker 240 can require the base station to mobile unit report power level data, as substituting or replenishing to PCU 200 report datas to the base-station transmitting-power order.
The selectable unit 250 that is used for producing the modulation scheme exchange command also can be realized at PCU 200.This unit 250 sends exchange command to the base station discontinuously or regularly, requires the base station to send data to mobile unit discontinuously or regularly, and the current untapped modulation scheme of this The data is modulated.This interim modulation scheme exchange allows mobile unit that the data that adopt the current untapped modulation of script to modulate are carried out link quality measurements, thereby allows the more accurate estimation to the link-quality of that modulation.
The unit 210 to 250 of PCU 200 can be embodied as software, hardware or its combination.Realize among the PCU 200 of unit 210 to 250 on all can the single network node in communication system.But distributed realization also is feasible, and unit 210 to 250 wherein is provided in different network nodes.For example, maker 240 and 250 functional can in different base stations, the realization.
Fig. 9 is a flow chart, illustrates to produce to be used to mobile unit to select the judgement of modulation scheme or the method for the information of selection.This method begins at step S1, and therein, mobile unit is carried out modulation scheme coherent signal or link quality measurements for radio blocks that receives from the base station or burst on communication link.Measure according to these, determine the link quality measure of the modulation scheme (modulation scheme 1) of current use.At next procedure S2, but for other available current untapped modulation scheme (modulation scheme 2) estimation corresponding link quality metrics.This estimation is carried out according to definite link-quality of current modulation and/or from the measurement result of that modulation.At last, at step S3, produce selection information according to the link quality measure of determining and estimate.This information will be used to select to be used for the suitable modulation scheme and/or the MCS of mobile unit.Then, this method finishes.
Figure 10 is a flow chart, illustrates in greater detail an embodiment of the estimation steps of Fig. 9.This method is proceeded from step S1.At next procedure S10, mobile unit receives the transmitted power level data from the base station that communicates with mobile unit.At this moment mobile unit can determine the corresponding power related with different modulating according to this power data.This power information is used for determining the process of the relevant link quality measure of modulation.At step S11, mobile unit also receives the data/piece that adopts the current modulation scheme of using (or best) to modulate discontinuously or regularly.This allow mobile unit equally to this/these modulation carry out actual measurements, thereby strengthen the accuracy of the link-quality estimation of this modulation.This means that the link quality measure of the modulation of current use and these measurement results and optional power data can be used for estimation.At next procedure S12, look-up table be used as the link quality measure of measuring and determining input, the modulation of current use.This table comprises the tabulation of analog value with second modulation measured of first modulation.Perhaps, one or several transfer functions can be used with first the measuring of modulation as input, and export the estimation link quality values of second modulation.Table and function are applicable to the functional and ability of specific mobile unit.Then, this method proceeds to the step S3 of Fig. 9.
Figure 11 is a flow chart, the additional step of the method for key diagram 9.This method is proceeded from step S2.At step S20, the link quality measure of different modulating is compared, so that determine best link quality and related modulation.Then, select current the best or optimum modulation scheme at step S21 according to comparative result.Under situation about measuring, in this step, select the modulation related usually with minimum BEP to BEP.At optional step S22, select the corresponding MCS of this selected modulation scheme.When method proceeded to step S3, the sign of selected modulation and/or MCS was included in the selection information.
Figure 12 is a flow chart, the additional step of the method for key diagram 9.This method is proceeded from step S1.At step S30,, produce link-quality and strengthen for to the subclass that adopts available modulation scheme, the quality enhancement algorithms that to work of one of them data of modulating for example.This quality enhancing also is used for the estimation process of next procedure S2, and/or is included in the selection information.
Figure 13 is a flow chart, illustrates that the enhancing of Figure 12 generates an embodiment of step.This method is proceeded from step S1.At next procedure S40, the link-quality of the modulation scheme related with enhancement algorithms is not determined in having the situation of activation algorithm.Step S41 this un-activation link-quality with identical modulation but the respective link quality metrics that has an algorithm operating compare.Link-quality strengthens gain and at this moment can determine according to these two link quality measure.Then, this method proceeds to step S2.
Figure 14 is a flow chart, illustrates that the enhancing of Figure 12 generates another embodiment of step.This method is proceeded from step S1.At next procedure S50, determine the activity ratio of enhancement algorithms.The quantity that this ratio is typically expressed as the burst that has activated algorithm therein is divided by the sum of burst that therein originally might activation algorithm.According to this activity ratio and possible other data, can estimate at least that as the average enhancing gain of algorithm link-quality strengthens.
Figure 15 is a flow chart, the additional step of the method for key diagram 9.This method is proceeded from step S3.At next procedure S60, in communication network, carry out the unit of modulation selection, the selection information that for example PCU report is produced.This report may be discontinuously or is regularly sent PCU to.As an alternative or supplement, report can be transmitted when the request that receives from PCU.
Person of skill in the art will appreciate that, can carry out various modifications and changes, and do not deviate from the scope of the present invention of claims definition the present invention.
Claims (34)
1. a generation is used for selecting the method for the information of modulation scheme from the multiple modulation scheme of the mobile unit (100) that can be used for radio communications system (1), said method comprising the steps of:
-described mobile unit (100) is determined the first modulation scheme relevant link quality of the communication link (410) of employing first modulation scheme;
-described mobile unit (100) is estimated the second modulation scheme relevant link quality of at least the second modulation scheme according to described first link-quality; And
-produce the described information that is used to select modulation scheme according to described first link-quality and described second link-quality.
2. the method for claim 1, wherein described determining step may further comprise the steps:
-described mobile unit (100) is carried out and is adopted measurement described first modulation scheme modulation and go up the data that receive at described communication link (410);
-described mobile unit (100) is determined described first link-quality according to described measurement.
3. method as claimed in claim 1 or 2, wherein, described estimation steps comprises the step of described mobile unit (100) definite described second link-quality from the table (134) of the link-quality of mapping different modulation schemes, and described link-quality mapping is suitable for the ability of described mobile unit (100).
4. method as claimed in claim 1 or 2, wherein, described estimation steps comprises that described mobile unit (100) adopts the step of described first link-quality as function input definite described second link-quality from the link-quality mapping function, and described link-quality mapping function is suitable for the ability of described mobile unit (100).
5. a generation is used for selecting the method for the information of modulation scheme from the multiple modulation scheme of the mobile unit (100) that can be used for radio communications system (1), said method comprising the steps of:
-described mobile unit (100) is carried out and is adopted the measurement modulation of first modulation scheme and go up the data that receive at communication link (410);
-described mobile unit (100) is determined the first modulation scheme relevant link quality according to described measurement;
-described mobile unit (100) is estimated the second modulation scheme relevant link quality of at least the second modulation scheme according to described measurement; And
-produce the described information that is used to select modulation scheme according to described first link-quality and described second link-quality.
6. as each the described method in the claim 1 to 5, further comprising the steps of:
-described mobile unit (100) compares described first link-quality and described second link-quality; And
-described mobile unit (100) relatively comes to determine preferred modulation scheme according to described, wherein, is used to select the described information of modulation scheme to comprise first identifier of described preferred modulation scheme.
7. method as claimed in claim 6, wherein, described first identifier comprises modulation related with described preferred modulation scheme and second identifier of encoding scheme.
8. as each the described method in the claim 1 to 4, further comprising the steps of:
-upward transmit the data that adopt described at least the second modulation scheme to modulate discontinuously at described communication link (410) to described mobile unit (100); And
The measurement of the described data that described at least the second modulation scheme of-described mobile unit (100) execution employing is modulated, wherein, described estimation steps comprises according to described first link-quality and adopts the described measurement of the described data that described at least the second modulation scheme modulates to estimate described second link-quality.
9. method as claimed in claim 5, further comprising the steps of:
-upward transmit the data that adopt described at least the second modulation scheme to modulate discontinuously at described communication link (410) to described mobile unit (100); And
The measurement of the described data that described at least the second modulation scheme of-described mobile unit (100) execution employing is modulated, wherein, described estimation steps comprises according to the described measurement of the described data that adopt described first modulation scheme to modulate and adopts the described measurement of the described data that described at least the second modulation scheme modulates to estimate described second link-quality.
10. as each the described method in the claim 1 to 9, wherein, described mobile unit (100) is fit to adopt performance enhancement algorithms (170), be used to strengthen the described link-quality of the described communication link (410) that adopts described first modulation scheme, described method comprises that described mobile unit (100) produces the step of the expression of the caused link quality performance enhancing of described performance enhancement algorithms (170), wherein, be used to select the described information of modulation scheme to comprise that described enhancing represents.
11. method as claimed in claim 10, wherein, described enhancing is represented to produce step and be may further comprise the steps:
-described mobile unit (100) is estimated the 3rd link-quality of described first modulation scheme under the situation of not using described performance enhancement algorithms (170); And
-described mobile unit (100) determines that according to described first link-quality and described the 3rd link-quality described enhancing represents.
12. method as claimed in claim 10, wherein, described enhancing is represented to produce step and is comprised that described mobile unit (100) determines the step of the utilization rate of described performance enhancement algorithms (170), and described enhancing represents to comprise described definite utilization rate.
13. as each the described method in the claim 10 to 12, wherein, described performance enhancement algorithms (170) is an interference suppression algorithm.
14. as each the described method in the claim 1 to 13, wherein, in described a plurality of modulation scheme each be used for going up related to unique transmitted power level of described mobile unit (100) Data transmission at described communication link (410), said method comprising the steps of:
-determine first transmitted power level that current and described first modulation scheme is related;
-definite corresponding second transmitted power level related with described at least the second modulation scheme,
Wherein, be used for selecting the described information of modulation scheme to comprise following at least one:
-described first transmitted power level and described second transmitted power level; And
-the amount that from described first transmitted power level and described second transmitted power level, derives.
15. one kind is fit to produce the mobile unit (100) that is used for selecting the information of modulation scheme from the available multiple modulation scheme of radio communications system (1), described mobile unit (100) comprising:
-be used for determine adopting the parts (120) of the first modulation scheme relevant link quality of the communication link (410) of first modulation scheme;
-be used for estimating the parts (130) of the second modulation scheme relevant link quality of at least the second modulation scheme according to described first link-quality; And
-be used for producing the parts (140) of the described information that is used to select modulation scheme according to described first link-quality and described second link-quality.
16. mobile unit as claimed in claim 15, also comprise the parts (110) that are used for the data that described first modulation scheme of reception employing is modulated on described communication link (410), wherein, described definite parts (120) configurations is used to carry out the link quality measurements of the data of described reception and modulation.
17. as claim 15 or 16 described mobile units, wherein, described estimation components (130) configuration is used for determining described second link-quality from the table (134) of the link-quality of mapping different modulation schemes that described link-quality mapping is suitable for the ability of described mobile unit (100).
18. as claim 15 or 16 described mobile units, wherein, described estimation components (130) configuration is used for adopting described first link-quality to import from definite described second link-quality of link-quality mapping function as function, and described link-quality mapping function is suitable for the ability of described mobile unit (100).
19. one kind is fit to produce the mobile unit (100) that is used for selecting the information of modulation scheme from the available multiple modulation scheme of radio communications system (1), described mobile unit (100) comprising:
-be used for go up to receive adopting the parts (110) of the data that first modulation scheme modulates at communication link (410);
-be used for determining the parts (120) of the first modulation scheme relevant link quality according to the measurement of the data of described reception;
-be used for estimating the parts (130) of the second modulation scheme relevant link quality of at least the second modulation scheme according to the described measurement of the data of described reception; And
-be used for producing the parts (140) of the described information that is used to select modulation scheme according to described first link-quality and described second link-quality.
20. each the described mobile unit as in the claim 15 to 19 also comprises:
-be used for parts (150) that described first link-quality and described second link-quality are compared; And
-be used for the parts (160) that relatively come to determine preferred modulation scheme according to described, wherein, be used to select the described information of modulation scheme to comprise first identifier of described preferred modulation scheme.
21. mobile unit as claimed in claim 20, wherein, described first identifier comprises modulation related with described preferred modulation scheme and second identifier of encoding scheme.
22. each the described mobile unit as in the claim 15 to 18 also comprises:
-be used on described communication link (410) receiving discontinuously the parts (110) that adopt the data that described at least the second modulation scheme modulates; And
-be used to carry out the parts (120) of the measurement of the data that adopt the described reception that described at least the second modulation scheme modulates, wherein, described estimation components (130) configuration is used for according to described first link-quality and adopts the described measurement of the data of the described reception that described at least the second modulation scheme modulates to estimate described second link-quality.
23. mobile unit as claimed in claim 19 also comprises:
-be used on described communication link (410) receiving discontinuously the parts (110) that adopt the data that described at least the second modulation scheme modulates; And
-be used to carry out the parts (120) of the measurement of the data that adopt the described reception that described at least the second modulation scheme modulates, wherein, described estimation components (130) configuration is used for according to the described measurement of the data of the described reception of adopting described first modulation scheme to modulate and adopts the described measurement of the data of the described reception that described at least the second modulation scheme modulates to estimate described second link-quality.
24. each the described mobile unit as in the claim 15 to 23 also comprises:
-performance reinforcing member (170) is used to strengthen the link-quality of the described communication link (410) that adopts described first modulation scheme;
-be used to produce the parts (180) of the expression that the caused by operations link quality performance of described performance reinforcing member (170) strengthens, wherein, described information generation parts (140) configuration is used for representing to produce the described information that is used to select modulation scheme according to described enhancing.
25. mobile unit as claimed in claim 24, the parts (120) that also comprise the relevant link-quality of the 3rd modulation that is used for described first modulation scheme of estimation under the situation that does not activate described performance reinforcing member (170), wherein, described enhancing represent to generate parts (180) configurations be used for according to described first link-quality and under the situation of not using described performance reinforcing member (170) described the 3rd link-quality of described first modulation scheme determine that described enhancing represents.
26. mobile unit as claimed in claim 24, wherein, described enhancing is represented to generate the activity ratio that parts (180) configuration is used for determining described performance reinforcing member (170), and described enhancing represents to comprise described definite activity ratio.
27. as each the described mobile unit in the claim 24 to 26, wherein, described performance reinforcing member (170) configuration is used to adopt interference suppression algorithm to strengthen link-quality.
28. as each the described mobile unit in the claim 15 to 27, wherein, in described a plurality of modulation scheme each be used for going up related to unique transmitted power level of described mobile unit (100) Data transmission at described communication link (410), described mobile unit (100) comprises be used for receiving from the base station (400) of transmitting described data the parts (110) that the transmitting power chosen is measured from following at least one:
First transmitted power level that-current and described first modulation scheme is related and with the second related transmitted power level of described at least the second modulation scheme; And
-the amount that derives from described first transmitted power level and described second transmitted power level, wherein, described estimation components (130) configuration is used for measuring according to the transmitting power of described reception estimates described second link-quality.
29. one kind is adapted at being provided with in the mobile unit (100) and being used for producing the information generating unit (190) that is used for selecting from the available multiple modulation scheme of radio communications system (1) information of modulation scheme, described unit (190) comprising:
-be used to provide the parts (120) of the first modulation scheme relevant link quality of the communication link (410) that adopts first modulation scheme;
-quality estimation device (130) is used for estimating according to described first link-quality second modulation scheme relevant link quality of at least the second modulation scheme; And
-the first maker (140) is used for producing the described information that is used to select modulation scheme according to described first link-quality and described second link-quality.
30. unit as claimed in claim 29 also comprises:
-comparator (150) is used for described first link-quality and described second link-quality are compared; And
-be used for the parts (160) that relatively come to determine preferred modulation scheme according to described, wherein, be used to select the described information of modulation scheme to comprise first identifier of described preferred modulation scheme.
31. unit as claimed in claim 30, wherein, described first identifier comprises modulation related with described preferred modulation scheme and second identifier of encoding scheme.
32. each the described unit as in the claim 29 to 31 also comprises:
-performance reinforcing member (170) is used to strengthen the link-quality of the described communication link (410) that adopts described first modulation scheme;
-the second maker (180), be used to produce the expression that the caused by operations link quality performance of described performance reinforcing member (170) strengthens, wherein, described first maker (140) configuration is used for representing to produce the described information that is used to select modulation scheme according to described enhancing.
A 33. modulation scheme selection unit (200), be arranged in the radio communications system (1), be used for from can be used for mobile unit (100) and be adapted at base station (400) and described mobile unit (100) between the multiple modulation scheme used of communication link (410) select modulation scheme, described unit (200) comprising:
-be used for receiving the parts (210) of the determination information that sends from described mobile unit (100), described determination information comprises first modulation scheme relevant link quality of the described communication link (410) that adopts first modulation scheme and the second modulation scheme relevant link quality of at least the second modulation scheme, and described second link-quality produces according to described first link-quality; And
-select to be used for the parts (230) of modulation scheme of the described communication link (410) of described mobile unit (100) according to the determination information of described reception.
34. unit as claimed in claim 33, also comprise the parts (210 that are used for transmitting discontinuously the modulation scheme exchange command to described base station (400), 250), described exchange command requires described base station (400) to go up to described mobile unit (100) at described communication link (410) and transmits the data that adopt described at least the second modulation scheme to modulate discontinuously.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101960733A (en) * | 2008-01-09 | 2011-01-26 | Lg电子株式会社 | Method of requesting and reporting link quality in an EGPRS2 system |
| CN104584472A (en) * | 2012-09-05 | 2015-04-29 | 高通股份有限公司 | Methods and devices for employing modulation and coding scheme for data block |
Families Citing this family (1)
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| CN101227253B (en) * | 2008-02-01 | 2013-02-27 | 中兴通讯股份有限公司 | Dynamic state altering method of enhancement type general use grouping wireless business encoder mode |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101960733A (en) * | 2008-01-09 | 2011-01-26 | Lg电子株式会社 | Method of requesting and reporting link quality in an EGPRS2 system |
| US8385274B2 (en) | 2008-01-09 | 2013-02-26 | Lg Electronics Inc. | Method of requesting and reporting link quality in an EGPRS2 system |
| CN101960733B (en) * | 2008-01-09 | 2014-03-19 | Lg电子株式会社 | Method of requesting and reporting link quality in an EGPRS2 system |
| CN104584472A (en) * | 2012-09-05 | 2015-04-29 | 高通股份有限公司 | Methods and devices for employing modulation and coding scheme for data block |
| CN104584472B (en) * | 2012-09-05 | 2018-08-21 | 高通股份有限公司 | Using the method and apparatus of modulation and encoding scheme for data block |
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| CN100581088C (en) | 2010-01-13 |
| CN1849766A (en) | 2006-10-18 |
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