CN101938321A - Method, device and system for determining modulation coding style - Google Patents
Method, device and system for determining modulation coding style Download PDFInfo
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- CN101938321A CN101938321A CN2009100867932A CN200910086793A CN101938321A CN 101938321 A CN101938321 A CN 101938321A CN 2009100867932 A CN2009100867932 A CN 2009100867932A CN 200910086793 A CN200910086793 A CN 200910086793A CN 101938321 A CN101938321 A CN 101938321A
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Abstract
The invention discloses a method, a device and a system for determining a modulation coding style. The method comprises the following steps of: receiving an indicating message transmitted by a relay station by a user terminal; carrying a modulation coding style (MCS) determined by the relay station according to the state information of a first channel in the indicating message; determining an equivalent state information index value of the first channel according to the MCS carried in the indicating message; determining the MCS used for transmitting the next frame data according to the equivalent state information index value of the first channel, the state information of a second channel and the state information of a third channel; and reporting the MCS to a network side. Due to the adoption of the method, the device and the system of the invention, the MCS which is used for transmitting the next frame data can be more reasonably determined according to the state information of the channels of the three links, therefore, the MCS is used for transmitting data to sufficiently use system resources and increase system thuoughput.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of modulation coding mode that is applied to collaborative relay system and determine method and apparatus and system.
Background technology
In traditional communication technology, when the signal transmitting terminal sent data to the purpose terminal, signal experienced certain decline at spatial transmission, finally arrives destination.But arrive in the process of purpose terminal at signal, can not add any artificial processing.And collaborative relay system is exactly to add one or more link terminals between transmitting terminal and purpose terminal, and signal is handled, and is when the signal after feasible the processing reaches terminal, more reliable when received signal ratio does not add relaying.Following behavior example generally adopts such trunk protocol, and as shown in Figure 1: in the phase I, the base station is to relay station and user terminal to transmit data; Second stage, relay station is transmitted data to user terminal.Like this, user terminal can obtain certain diversity gain by merging the data in two stages.
Relaying strategy commonly used at present mainly contains two kinds: AF (Amplify and Forward) is transmitted in amplification and DF (Decode and Forward) is transmitted in decoding.AF carries out amplifieroperation to the data that receive, and the gain of amplification is relevant with the transmitting power that the relay station place is set.And if the relaying strategy is DF, then relay station need carry out a series of and the user terminal identical operations, and the data that receive are returned to original information bit, and can judge whether the data that receive are correct by CRC check.Then with the data recompile, modulate and send to user terminal.In general, when the data of judging reception when relay station are made mistakes, just no longer the data recompile of mistake is sent, avoids error propagation, have only CRC check to pass through after, just transmit.
But the increase of relay station also means and need reserve the corresponding communication resource for relay station, for example, need relaying to transmit the user terminal that just can receive data for those, with do not carry out relaying and transmit and to compare, transmit same data, the transfer of data of double bounce means the time that needs twice, and frequency or other resources promptly mean the reduction of the validity of communicating by letter.Adaptive Modulation and Coding AMC technology can be according to the existing situation adjustment modulation coding mode (MCS) (Modulation and CodingScheme) that transmitting terminal adopted of channel, when channel conditions is better, adopt the higher MCS of transmission rate to transmit, thereby increase the throughput of system, in traditional non-communication for coordination, playing the part of the role who improves the availability of frequency spectrum, therefore, the AMC technology is applied to collaborative relay system and becomes an effective way that promotes collaborative relay system performance.
At present, the AMC technology is applied in the existing scheme of collaborative relay system, just adjust the MCS that transfer of data is used according to the channel conditions of a link or two links, there is not the collaborative relay system of comprehensive comprehensively consideration to comprise the characteristics of three links, so can't fully effectively utilize system resource.
In addition, though in some researchs, considered the channel conditions of three links, no matter but because in the base station, relay station or user terminal are determined MCS, it only can obtain the channel conditions of two links directly related with self, and can't obtain the channel conditions of the 3rd link, and directly the state information of based on feedback link can take link circuit resource, influence transfer of data, reduce systematic function, so, the existing scheme of having considered the channel conditions of three links all is based on the channel condition information of the 3rd link under can desirable situation about obtaining, and therefore, has limited the realization of these schemes.
Summary of the invention
The embodiment of the invention provides a kind of modulation coding mode to determine method and apparatus and system, in order to state information according to the channel of three links, more reasonably determine the MCS that the next frame transfer of data is used, use this MCS transmission data, can make full use of system resource, improve throughput of system.
The embodiment of the invention provides a kind of modulation coding mode to determine method, comprising:
User terminal receives the Indication message that relay station sends; Carry the modulation coding mode MCS that described relay station is determined according to the state information of first channel in the described Indication message; Described first channel is the channel of base station to described relay station;
Described user terminal is determined the equivalent state information desired value of described first channel according to the MCS that carries in the described Indication message;
Described user terminal is determined the MCS that the next frame transfer of data is used according to the equivalent state information desired value of described first channel, the state information of second channel and the state information of the 3rd channel, and the report network side; Described second channel is the channel of described base station to described user terminal; Described the 3rd channel is the channel of described relay station to described user terminal.
The embodiment of the invention also provides a kind of user terminal, comprises
Receiving element is used to receive the Indication message that relay station sends; Carry the modulation coding mode MCS that described relay station is determined according to the state information of first channel in the described Indication message; Described first channel is the channel of base station to described relay station;
The information determining unit is used for determining according to the MCS that described Indication message carries the equivalent state information desired value of described first channel;
The MCS determining unit is used for the equivalent state information desired value according to described first channel, the state information of second channel and the state information of the 3rd channel, determines the MCS that the next frame transfer of data is used; Described second channel is the channel of described base station to this user terminal; Described the 3rd channel is the channel of described relay station to this user terminal;
Report the unit, the MCS report network side that the next frame transfer of data that is used for determining is used.
The embodiment of the invention provides a kind of modulation coding mode to determine system again, comprising: relay station, user terminal and base station;
Described relay station is used for sending Indication message to described user terminal; Carry the modulation coding mode MCS that it is determined according to the state information of first channel in the described Indication message; Described first channel is the channel of described base station to described relay station;
Described user terminal is used to receive described Indication message; And determine the equivalent state information desired value of described first channel according to the MCS that carries in the described Indication message; And, determine the MCS that the next frame transfer of data is used, and report described base station according to the equivalent state information desired value of described first channel, the state information of second channel and the state information of the 3rd channel; Described second channel is the channel of described base station to described user terminal; Described the 3rd channel is the channel of described relay station to described user terminal;
Described base station is used to receive the MCS that the described next frame transfer of data of described user terminal to send up is used.
In the embodiment of the invention, relay station will be informed user terminal according to the MCS that the state information of first channel is determined, user terminal is determined the equivalent state information desired value of first channel according to this MCS, this equivalence state information desired value has characterized the state information of first channel, the systematic function of having avoided the state information of direct based on feedback link to cause descends, and then user terminal is according to this equivalence state information desired value, the state information of the state information of second channel and the 3rd channel, determine the MCS that the next frame transfer of data is used, because the MCS that determines determines according to the state information of the channel of three links, therefore, use this more rational MCS transmission data, utilize system resource fully, improved throughput of system.
Description of drawings
Fig. 1 is collaborative relay system structural representation;
Fig. 2 determines one of method flow diagram for a kind of modulation coding mode that the embodiment of the invention provides;
Fig. 3 determines two of method flow diagram for a kind of modulation coding mode that the embodiment of the invention provides;
Fig. 4 is the SINR-BLER curve chart of each MCS correspondence;
The structural representation of a kind of user terminal that Fig. 5 provides for the embodiment of the invention;
The structural representation of the MCS determining unit of a kind of user terminal that Fig. 6 provides for the embodiment of the invention;
A kind of modulation coding mode that Fig. 7 provides for the embodiment of the invention is determined the structural representation of system.
Embodiment
The embodiment of the invention provides a kind of modulation coding mode to determine method, as shown in Figure 2, comprising:
Step S201, user terminal receive the Indication message that relay station sends.Carry the modulation coding mode MCS that relay station is determined according to the state information of first channel in this Indication message; First channel is the channel of base station to relay station.
Step S202, user terminal are determined the equivalent state information desired value of first channel according to the MCS that carries in this Indication message.
Step S203, user terminal are determined the MCS that the next frame transfer of data is used according to the equivalent state information desired value of first channel, the state information of second channel and the state information of the 3rd channel, and the report network side; Second channel is the channel of base station to user terminal; The 3rd channel is the channel of relay station to user terminal.
Below in conjunction with accompanying drawing, be example with orthogonal frequency division multiplex OFDM (Orthogonal Frequency DivisionMultiplexing) system with carrying out downlink data transmission, method provided by the invention is described in detail.
As shown in Figure 3, comprising:
After step S301, relay station receive these frame data of base station transmission, first channel is carried out channel estimating obtain channel condition information, and according to the definite MCS that is fit to be undertaken the transfer of data use of the state information of first channel by first channel, specifically can adopt any method of the prior art, not do detailed description at this.
Step S302, relay station are informed user terminal with the MCS that determines, be specially to user terminal and send the Indication message that carries the MCS that determines, for ease of realizing that the form of this Indication message in the embodiment of the invention adopts the form of cqi CQI message, by wherein
Individual bit represents that the MCS that determines is any MCS among the transfer of data n kind MCS that can use,
For to log
2The result that n rounds up.
After step S303, user terminal receive these frame data of base station and relay station transmission, second channel and the 3rd channel are carried out channel estimating, obtain the state information of second channel and the state information of the 3rd channel respectively, if relay station is not to user terminal to transmit data in the transmission of these frame data, the state information of the second channel of the MCS time institute foundation that then follow-up definite next frame transfer of data is used is, relay station carries out the state information of the second channel that channel estimating obtains to second channel when user terminal sends the previous frame data.This step S303 and above-mentioned steps S301 and step S302 do not have strict sequencing.
The MCS that carries in step S304, the Indication message of user terminal according to reception determines the equivalent state information desired value of first channel, and is specific as follows:
In the embodiment of the invention, user terminal stores the n kind MCS that transfer of data can be used in its this locality, and also store corresponding with j kind MCS, the equivalent state information desired value γ of correspondence when block error rate BLER is the target setting value
j, j gets the integer that satisfies 1≤j≤n, and γ
j＜γ
J+1, promptly n kind MCS is by its equivalent state information desired value γ
jAscending ordering.Be 11 with n in the embodiment of the invention, the state information index is that Signal to Interference plus Noise Ratio SINR (Signal to Interference plus NoiseRatio) is described for example, Figure 4 shows that the SINR-BLER curve under each comfortable AWGN of 11 kinds of MCS (Additive WhiteGaussian Noise) channel, accordingly, the target setting value of BLER is 0.01 o'clock γ
jAlso indicate in the drawings.11 kinds of MCS are as shown in table 1:
Table 1:MCS tabulation
| CQI?index | Modulation system | Code check |
| 1 | QPSK | 120/1024 |
| 2 | QPSK | 193/1024 |
| 3 | QPSK | 308/1024 |
| 4 | QPSK | 449/1024 |
| 5 | |
602/1024 |
| 6 | 16QAM | 378/1024 |
| 7 | 16QAM | 490/1024 |
| 8 | 16QAM | 616/1024 |
| 9 | 64QAM | 466/1024 |
| 10 | 64QAM | 567/1024 |
| 11 | 64QAM | 666/1024 |
When the MCS that carries in the Indication message is the 1st kind of MCS, determine the equivalent state information desired value γ of first channel
SRBe interval [alpha, gamma
2) in arbitrary value; Wherein, α is for being 1 o'clock corresponding equivalent state information desired value with the 1st kind of Block Error Rate that MCS is corresponding; Preferable, α is for being 1 o'clock maximum in corresponding a plurality of equivalent state information desired values with the 1st kind of Block Error Rate that MCS is corresponding; Better, can determine γ
SRBe γ
1
When the MCS that carries in the Indication message is i kind MCS, determine the equivalent state information desired value γ of first channel
SRBe interval [γ
i, γ
I+1) in arbitrary value; I is greater than 1 and less than 11 integer; Preferable, can determine γ
SRBe (γ
i+ γ
I+1)/2.
When the MCS that carries in the Indication message is the 11st kind of MCS, determine the equivalent state information desired value γ of first channel
SRBe interval [γ
11, β] in arbitrary value; Wherein, β is for being 0 o'clock corresponding equivalent state information desired value with the 11st kind of Block Error Rate that MCS is corresponding; Preferable, β can be 10
-4Or 10
-5Better, can determine γ
SRBe γ
11+ (γ
11-γ
10)/2.
The embodiment of the invention is determined the state information desired value γ of first channel
SRAfter, according to the equivalent state information desired value γ of first channel
SR, the state information of second channel and the state information of the 3rd channel, determine the MCS that the next frame transfer of data is used, specific as follows:
The state information of obtaining among the above-mentioned steps S303 is the post-SINR on each subcarrier, when system is ofdm system, can adopt the method for index equivalence SINR mapping EESM (Exponential EffectiveSINR Mapping), with the post-SINR on each subcarrier according to formula
Obtain equivalent SINR γ
EffWherein, K represents number of sub carrier wave;
It is the post-SINR value of k subcarrier; B is a scale factor, is used for not carrying out the adjusting of the compression function of certain mode when prediction BLER matches with true BLER, and b is relevant with the length of employed MCS and encoding block.Can also adopt mutual information equivalence SINR mapping method to obtain equivalent SINR γ among other embodiment
Eff,, also can adopt other equivalent SINR mapping methods to obtain equivalent SINR γ accordingly for the system of other standards
Eff
In the embodiment of the invention, according to second channel
Adopt the EESM method to determine the equivalent SINR value of the second channel corresponding with each MCS
According to second channel
With the 3rd channel
Obtain second channel and the 3rd combining channel
And adopt the EESM method to determine the equivalent SINR value of second channel corresponding and the 3rd combining channel with each MCS
Then, according to the γ that determines
SR,
With
Determine and each MCS corresponding reference Block Error Rate P
jWith reference throughput η
j, specifically adopt following formula to determine:
Then, the P that compares each MCS correspondence
jWith target setting value P
TSize, determine P among 11 kinds of MCS
j≤ P
TEach MCS, determine wherein η
jThe MCS that maximum a kind of MCS uses for the next frame transfer of data; When there not being P
j≤ P
TMCS the time, determine the MCS that the 1st kind of MCS uses for the next frame transfer of data.
Among other embodiment,, adopt corresponding formulas to determine with reference to Block Error Rate P for the system of other standards and concrete DF agreement
jWith reference throughput η
j
Among other embodiment, the state information index can also be used signal interference ratio SIR and signal to noise ratio snr.
The MCS report network side that step S305, user terminal use the next frame transfer of data of determining, be specially: user terminal reports base station and relay station with the MCS that determines.
User terminal can report base station and relay station with the MCS that determines by CQI message.
Among other embodiment, also can user terminal the MCS that determines be reported the base station, relay station is informed with this MCS again in the base station.
Base station and relay station use this MCS that data are carried out modulating-coding when the next frame transfer of data after knowing the MCS that user terminal determines, and send.
Be that example is described method provided by the invention with the ofdm system in the embodiment of the invention, but method provided by the invention is not limited to be applied in the ofdm system, also can be applicable in the other system, corresponding above-mentioned expression formula is made corresponding change according to different systems.
Based on same inventive concept, determine method according to the modulation coding mode that the above embodiment of the present invention provides, correspondingly, another embodiment of the present invention also provides a kind of user terminal, and its structural representation comprises as shown in Figure 5:
Receiving element 501 is used to receive the Indication message that relay station sends; Carry the modulation coding mode MCS that relay station is determined according to the state information of first channel in this Indication message; First channel is the channel of base station to relay station;
Preferable, above-mentioned information determining unit 502 when the MCS that also is used for carrying when this Indication message is the 1st kind of MCS, is determined the equivalent state information desired value γ of first channel
SRBe interval [alpha, gamma
2) in arbitrary value; When the MCS that carries in this Indication message is i kind MCS, determine the equivalent state information desired value γ of first channel
SRBe interval [γ
i, γ
I+1) in arbitrary value; I is greater than 1 and less than the integer of n; When the MCS that carries in this Indication message is n kind MCS, determine the equivalent state information desired value γ of first channel
SRBe interval [γ
n, β] in arbitrary value;
Wherein, n is the quantity of the transfer of data MCS that can use; γ
jFor corresponding with j kind MCS, the equivalent state information desired value of correspondence when Block Error Rate is the target setting value; J gets the integer that satisfies 1≤j≤n, and γ
j＜γ
J+1α is for being 1 o'clock corresponding equivalent state information desired value with the 1st kind of Block Error Rate that MCS is corresponding; β is 0 o'clock corresponding equivalent state information desired value for the Block Error Rate corresponding with n kind MCS.
Preferable, above-mentioned MCS determining unit 503 as shown in Figure 6, comprising:
First determines subelement 601, is used for determining according to the state information of second channel the equivalent state information desired value of the second channel corresponding with j kind MCS
And, determine the second channel corresponding and the equivalent state information desired value of the 3rd combining channel with j kind MCS according to the state information of second channel and the state information of the 3rd channel
Second determines subelement 602, is used for according to equivalent state information desired value γ
SR, equivalent state information desired value
With equivalent state information desired value
Determine with j kind MCS corresponding reference Block Error Rate with reference to throughput;
The 3rd determines subelement 603, be used for determining n kind MCS with reference to Block Error Rate smaller or equal to the MCS that uses for the next frame transfer of data with reference to a kind of MCS of throughput maximum among the various MCS of target setting value; And when not existing with reference to Block Error Rate, determine the MCS that the 1st kind of MCS uses for the next frame transfer of data smaller or equal to the MCS of target setting value.
Preferable, the above-mentioned unit 504 that reports, MCS reporting base station and relay station that the next frame transfer of data that also is used for determining is used.
Based on same inventive concept, determine method according to the modulation coding mode that the above embodiment of the present invention provides, correspondingly, another embodiment of the present invention also provides a kind of modulation coding mode to determine system, its structural representation comprises as shown in Figure 7: relay station 701, user terminal 702 and base station 703;
Above-mentioned relay station 701 is used for sending Indication message to above-mentioned user terminal 702; Carry the modulation coding mode MCS that it is determined according to the state information of first channel in this Indication message; First channel is the channel of above-mentioned base station 703 to above-mentioned relay station 701;
Above-mentioned user terminal 702 is used to receive this Indication message; And determine the equivalent state information desired value of first channel according to the MCS that carries in this Indication message; And, determine the MCS that the next frame transfer of data is used, and report above-mentioned base station 703 according to the equivalent state information desired value of first channel, the state information of second channel and the state information of the 3rd channel; Second channel is the channel of above-mentioned base station 703 to above-mentioned user terminal 702; The 3rd channel is the channel of above-mentioned relay station 701 to above-mentioned user terminal 702;
Above-mentioned base station 703 is used to receive the MCS that next frame transfer of data that above-mentioned user terminal 702 reports is used.
Above-mentioned base station 703 is used this MCS that data are carried out modulating-coding when the next frame transfer of data, and is sent to user terminal and relay station after knowing the MCS that user terminal determines.
Preferable, when above-mentioned user terminal 702, the MCS that also is used for carrying when this Indication message are the 1st kind of MCS, determine the equivalent state information desired value γ of first channel
SRBe interval [alpha, gamma
2) in arbitrary value; When the MCS that carries in this Indication message is i kind MCS, determine the equivalent state information desired value γ of first channel
SRBe interval [γ
i, γ
I+1) in arbitrary value; I is greater than 1 and less than the integer of n; When the MCS that carries in this Indication message is n kind MCS, determine the equivalent state information desired value γ of first channel
SRBe interval [γ
n, β] in arbitrary value;
Wherein, n is the quantity of the transfer of data MCS that can use; γ
jFor corresponding with j kind MCS, the equivalent state information desired value of correspondence when Block Error Rate is the target setting value; J gets the integer that satisfies 1≤j≤n, and γ
j＜γ
J+1α is for being 1 o'clock corresponding equivalent state information desired value with the 1st kind of Block Error Rate that MCS is corresponding; β is 0 o'clock corresponding equivalent state information desired value for the Block Error Rate corresponding with n kind MCS.
Preferable, above-mentioned user terminal 702 also is used for determining according to the state information of second channel the equivalent state information desired value of the second channel corresponding with j kind MCS
And, determine the second channel corresponding and the equivalent state information desired value of the 3rd combining channel with j kind MCS according to the state information of second channel and the state information of the 3rd channel
And according to equivalent state information desired value γ
SR, equivalent state information desired value
With equivalent state information desired value
Determine with j kind MCS corresponding reference Block Error Rate with reference to throughput; And among definite n kind MCS with reference to Block Error Rate smaller or equal to the MCS that uses for the next frame transfer of data with reference to a kind of MCS of throughput maximum among the various MCS of target setting value; And when not existing with reference to Block Error Rate, determine the MCS that the 1st kind of MCS uses for the next frame transfer of data smaller or equal to the MCS of target setting value.
Preferable, above-mentioned user terminal 702, the MCS that the next frame transfer of data that also is used for determining is used reports above-mentioned relay station 701;
Above-mentioned relay station 701 also is used to receive the MCS that the next frame transfer of data of above-mentioned user terminal to send up is used.
Above-mentioned relay station 701 uses this MCS that data are carried out modulating-coding when the next frame transfer of data, and sends to user terminal after knowing the MCS that user terminal determines.
In sum, the scheme that the embodiment of the invention provides comprises: user terminal receives the Indication message that relay station sends; Carry the modulation coding mode MCS that relay station is determined according to the state information of first channel in this Indication message; And the equivalent state information desired value of determining first channel according to the MCS that carries in this Indication message; And, determine the MCS that the next frame transfer of data is used, and report network side according to the equivalent state information desired value of first channel, the state information of second channel and the state information of the 3rd channel.The scheme that adopts the embodiment of the invention to provide can be according to the state information of the channel of three links, more reasonably determines the MCS that the next frame transfer of data is used, and then uses this MCS transmission data, has made full use of system resource, has improved throughput of system.
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 (13)
1. a modulation coding mode is determined method, it is characterized in that, comprising:
User terminal receives the Indication message that relay station sends; Carry the modulation coding mode MCS that described relay station is determined according to the state information of first channel in the described Indication message; Described first channel is the channel of base station to described relay station;
Described user terminal is determined the equivalent state information desired value of described first channel according to the MCS that carries in the described Indication message;
Described user terminal is determined the MCS that the next frame transfer of data is used according to the equivalent state information desired value of described first channel, the state information of second channel and the state information of the 3rd channel, and the report network side; Described second channel is the channel of described base station to described user terminal; Described the 3rd channel is the channel of described relay station to described user terminal.
2. the method for claim 1 is characterized in that, described user terminal is specially according to the equivalent state information desired value that the MCS that carries in the described Indication message determines described first channel:
When the MCS that carries in the described Indication message is the 1st kind of MCS, determine the equivalent state information desired value γ of described first channel
SRBe interval [alpha, gamma
2) in arbitrary value;
When the MCS that carries in the described Indication message is i kind MCS, determine the equivalent state information desired value γ of described first channel
SRBe interval [γ
i, γ
I+1) in arbitrary value; I is greater than 1 and less than the integer of n;
When the MCS that carries in the described Indication message is n kind MCS, determine the equivalent state information desired value γ of described first channel
SRBe interval [γ
n, β] in arbitrary value;
Wherein, n is the quantity of the transfer of data MCS that can use; γ
jFor corresponding with j kind MCS, the equivalent state information desired value of correspondence when Block Error Rate is the target setting value; J gets the integer that satisfies 1≤j≤n, and γ
j＜γ
J+1α is for being 1 o'clock corresponding equivalent state information desired value with the 1st kind of Block Error Rate that MCS is corresponding; β is 0 o'clock corresponding equivalent state information desired value for the Block Error Rate corresponding with n kind MCS.
3. method as claimed in claim 2 is characterized in that, described user terminal is determined the MCS that the next frame transfer of data is used according to the equivalent state information of described first channel, the state information of second channel and the state information of the 3rd channel, is specially:
Determine the equivalent state information desired value of the described second channel corresponding with j kind MCS according to the state information of described second channel
And, determine the described second channel corresponding and the equivalent state information desired value of described the 3rd combining channel with j kind MCS according to the state information of described second channel and the state information of described the 3rd channel
According to described equivalent state information desired value γ
SR, described equivalent state information desired value
With described equivalent state information desired value
Determine with j kind MCS corresponding reference Block Error Rate with reference to throughput;
Determine among the n kind MCS with reference to Block Error Rate smaller or equal to the MCS that uses for the next frame transfer of data with reference to a kind of MCS of throughput maximum among the various MCS of described target setting value; And
When not existing with reference to Block Error Rate, determine the MCS that the 1st kind of MCS uses for the next frame transfer of data smaller or equal to the MCS of described target setting value.
4. as the arbitrary described method of claim 1-3, it is characterized in that described report network side is specially:
The MCS that described user terminal uses the next frame transfer of data of determining reports described base station and described relay station.
5. as the arbitrary described method of claim 1-3, it is characterized in that the form of described Indication message is the form of cqi CQI message.
6. a user terminal is characterized in that, comprising:
Receiving element is used to receive the Indication message that relay station sends; Carry the modulation coding mode MCS that described relay station is determined according to the state information of first channel in the described Indication message; Described first channel is the channel of base station to described relay station;
The information determining unit is used for determining according to the MCS that described Indication message carries the equivalent state information desired value of described first channel;
The MCS determining unit is used for the equivalent state information desired value according to described first channel, the state information of second channel and the state information of the 3rd channel, determines the MCS that the next frame transfer of data is used; Described second channel is the channel of described base station to this user terminal; Described the 3rd channel is the channel of described relay station to this user terminal;
Report the unit, the MCS report network side that the next frame transfer of data that is used for determining is used.
7. user terminal as claimed in claim 6 is characterized in that, described information determining unit when the MCS that also is used for carrying when described Indication message is the 1st kind of MCS, is determined the equivalent state information desired value γ of described first channel
SRBe interval [alpha, gamma
2) in arbitrary value; When the MCS that carries in the described Indication message is i kind MCS, determine the equivalent state information desired value γ of described first channel
SRBe interval [γ
i, γ
I+1) in arbitrary value; I is greater than 1 and less than the integer of n; When the MCS that carries in the described Indication message is n kind MCS, determine the equivalent state information desired value γ of described first channel
SRBe interval [γ
n, β] in arbitrary value;
Wherein, n is the quantity of the transfer of data MCS that can use; γ
jFor corresponding with j kind MCS, the equivalent state information desired value of correspondence when Block Error Rate is the target setting value; J gets the integer that satisfies 1≤j≤n, and γ
j＜γ
J+1α is for being 1 o'clock corresponding equivalent state information desired value with the 1st kind of Block Error Rate that MCS is corresponding; β is 0 o'clock corresponding equivalent state information desired value for the Block Error Rate corresponding with n kind MCS.
8. user terminal as claimed in claim 7 is characterized in that, described MCS determining unit comprises:
First determines subelement, is used for determining according to the state information of described second channel the equivalent state information desired value of the described second channel corresponding with j kind MCS
And, determine the described second channel corresponding and the equivalent state information desired value of described the 3rd combining channel with j kind MCS according to the state information of described second channel and the state information of described the 3rd channel
Second determines subelement, is used for according to described equivalent state information desired value γ
SR, described equivalent state information desired value
With described equivalent state information desired value
Determine with j kind MCS corresponding reference Block Error Rate with reference to throughput;
The 3rd determines subelement, be used for determining n kind MCS with reference to Block Error Rate smaller or equal to the MCS that uses for the next frame transfer of data with reference to a kind of MCS of throughput maximum among the various MCS of described target setting value; And when not existing with reference to Block Error Rate, determine the MCS that the 1st kind of MCS uses for the next frame transfer of data smaller or equal to the MCS of described target setting value.
9. as the arbitrary described user terminal of claim 6-8, it is characterized in that, the described unit that reports, the MCS that the next frame transfer of data that also is used for determining is used reports described base station and described relay station.
10. a modulation coding mode is determined system, it is characterized in that, comprising: relay station, user terminal and base station;
Described relay station is used for sending Indication message to described user terminal; Carry the modulation coding mode MCS that it is determined according to the state information of first channel in the described Indication message; Described first channel is the channel of described base station to described relay station;
Described user terminal is used to receive described Indication message; And determine the equivalent state information desired value of described first channel according to the MCS that carries in the described Indication message; And, determine the MCS that the next frame transfer of data is used, and report described base station according to the equivalent state information desired value of described first channel, the state information of second channel and the state information of the 3rd channel; Described second channel is the channel of described base station to described user terminal; Described the 3rd channel is the channel of described relay station to described user terminal;
Described base station is used to receive the MCS that the described next frame transfer of data of described user terminal to send up is used.
11. system as claimed in claim 10 is characterized in that, when described user terminal, the MCS that also is used for carrying when described Indication message are the 1st kind of MCS, determines the equivalent state information desired value γ of described first channel
SRBe interval [alpha, gamma
2) in arbitrary value; When the MCS that carries in the described Indication message is i kind MCS, determine the equivalent state information desired value γ of described first channel
SRBe interval [γ
i, γ
I+1) in arbitrary value; I is greater than 1 and less than the integer of n; When the MCS that carries in the described Indication message is n kind MCS, determine the equivalent state information desired value γ of described first channel
SRBe interval [γ
n, β] in arbitrary value;
Wherein, n is the quantity of the transfer of data MCS that can use; γ
jFor corresponding with j kind MCS, the equivalent state information desired value of correspondence when Block Error Rate is the target setting value; J gets the integer that satisfies 1≤j≤n, and γ
j＜γ
J+1α is for being 1 o'clock corresponding equivalent state information desired value with the 1st kind of Block Error Rate that MCS is corresponding; β is 0 o'clock corresponding equivalent state information desired value for the Block Error Rate corresponding with n kind MCS.
12. system as claimed in claim 11 is characterized in that, described user terminal also is used for determining according to the state information of described second channel the equivalent state information desired value of the described second channel corresponding with j kind MCS
And, determine the described second channel corresponding and the equivalent state information desired value of described the 3rd combining channel with j kind MCS according to the state information of described second channel and the state information of described the 3rd channel
And according to described equivalent state information desired value γ
SR, described equivalent state information desired value
With described equivalent state information desired value
Determine with j kind MCS corresponding reference Block Error Rate with reference to throughput; And among definite n kind MCS with reference to Block Error Rate smaller or equal to the MCS that uses for the next frame transfer of data with reference to a kind of MCS of throughput maximum among the various MCS of described target setting value; And when not existing with reference to Block Error Rate, determine the MCS that the 1st kind of MCS uses for the next frame transfer of data smaller or equal to the MCS of described target setting value.
13. as the arbitrary described system of claim 10-12, it is characterized in that,
Described user terminal also is used for the MCS that described next frame transfer of data is used is reported described relay station;
Described relay station also is used to receive the MCS that the described next frame transfer of data of described user terminal to send up is used.
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| CN2009100867932A CN101938321A (en) | 2009-06-30 | 2009-06-30 | Method, device and system for determining modulation coding style |
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| CN2009100867932A CN101938321A (en) | 2009-06-30 | 2009-06-30 | Method, device and system for determining modulation coding style |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104052569A (en) * | 2013-03-12 | 2014-09-17 | 中兴通讯股份有限公司 | MCS switching method and device |
| CN107820216A (en) * | 2016-09-12 | 2018-03-20 | 成都鼎桥通信技术有限公司 | Dispatching method and device based on SC MTCH |
| WO2018082056A1 (en) * | 2016-11-04 | 2018-05-11 | 华为技术有限公司 | Data transmission method and apparatus |
| CN108924779A (en) * | 2018-06-07 | 2018-11-30 | 天津大学 | A kind of multi-hop compression coding forwarding data transmission method |
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- 2009-06-30 CN CN2009100867932A patent/CN101938321A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104052569A (en) * | 2013-03-12 | 2014-09-17 | 中兴通讯股份有限公司 | MCS switching method and device |
| CN104052569B (en) * | 2013-03-12 | 2020-06-30 | 中兴通讯股份有限公司 | Method and device for switching MCS |
| CN107820216A (en) * | 2016-09-12 | 2018-03-20 | 成都鼎桥通信技术有限公司 | Dispatching method and device based on SC MTCH |
| CN107820216B (en) * | 2016-09-12 | 2021-06-01 | 成都鼎桥通信技术有限公司 | Scheduling method and device based on SC-MTCH |
| WO2018082056A1 (en) * | 2016-11-04 | 2018-05-11 | 华为技术有限公司 | Data transmission method and apparatus |
| CN109906571A (en) * | 2016-11-04 | 2019-06-18 | 华为技术有限公司 | Data transmission method and device |
| CN109906571B (en) * | 2016-11-04 | 2021-11-05 | 北京易通峰联信息技术有限公司 | Data transmission method and device |
| CN108924779A (en) * | 2018-06-07 | 2018-11-30 | 天津大学 | A kind of multi-hop compression coding forwarding data transmission method |
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