CN101877626A - Adaptive modulation and coding method, system and device - Google Patents
Adaptive modulation and coding method, system and device Download PDFInfo
- Publication number
- CN101877626A CN101877626A CN 200910083116 CN200910083116A CN101877626A CN 101877626 A CN101877626 A CN 101877626A CN 200910083116 CN200910083116 CN 200910083116 CN 200910083116 A CN200910083116 A CN 200910083116A CN 101877626 A CN101877626 A CN 101877626A
- Authority
- CN
- China
- Prior art keywords
- prb
- right quantity
- complete
- brachymemma
- total
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 102100037204 Sal-like protein 1 Human genes 0.000 claims abstract 27
- 102100028880 Zinc finger C4H2 domain-containing protein Human genes 0.000 claims abstract 9
- 238000006243 chemical reaction Methods 0.000 claims description 59
- 239000002245 particle Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 102100026503 Sperm mitochondrial-associated cysteine-rich protein Human genes 0.000 description 37
- 238000010586 diagram Methods 0.000 description 9
- 230000011664 signaling Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 239000013256 coordination polymer Substances 0.000 description 6
- 102100029516 Basic salivary proline-rich protein 1 Human genes 0.000 description 5
- 101001125486 Homo sapiens Basic salivary proline-rich protein 1 Proteins 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides an adaptive modulation and coding method. The method comprises the following steps that: a transmitting node transmits downlink data by using a puncture physical resource block (PRB) and a complete PRB; the transmitting node determines the transmission block size TBS transmitted to a receiving node and a total number of the PRB pairs of the number of the complete PRB pairs for dispatching and the number of the puncture PRB pairs according to carried services; the transmitting node dispatches and transmits the downlink data for the receiving node and transmits the total number of the adopted PRB pairs, the position information and the MCS sequence number to the receiving node; the receiving node calculates the total resource number; and the receiving node calculates the number of the converted complete PRB pairs according to the total resource number and determines the TBS of the downlink data according to the calculated number of the converted complete PRB pairs and the TBS sequence number determined through the MCS sequence number. Through the method, all or part of special conditions when the puncture of the PRB transmits the downlink data can be processed by using the adaptive processing process and resource of a conventional normal subframe, so that the effects of simpleness and high efficiency are achieved.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of adaptive modulation and coding method, system and device.
Background technology
3-G (Generation Three mobile communication system) (3G) adopts CDMA (Code-Division Multiple Access, code division multiple access) mode, supports multimedia service, can have higher competitiveness in several years of future.But in order to ensure in the longer time, keeping this competitiveness, 3GPP (Third GenerationPartnership Project, third generation partner plan) started LTE (LongTerm Evolution, the Long Term Evolution) research project of 3G wireless interface technology.And AMC (Adaptive Modulation andCoding, adaptive modulation and coding) technology has become one of key technology of LTE.
AMC is the adaptive modulation and coding technology, be a kind of modulation and the coded system that can transmit data by adjustment adaptively, compensate the influence of fading that is caused to received signal owing to channel variation, thereby improve physical layer link self adaptation (Link Adaptation) technology of the signal-to-noise performance of signal.The implementation of AMC is: system is according to self physical layer ability and channel variance situation, set up the coded modulation form set (MCS of a transformat, Modulation And Coding Scheme), transformat among each MCS comprises parameters such as transmission digital coding speed and modulation system, when channel condition changed, system can select the different transpost formats corresponding with channel condition to come adaptive channel to change.In order better understanding to be arranged, below will simply introduce the more used basic technologies of the present invention to the present invention.
At present, the LTE system determine to support 2 kinds of frame structures, is applicable to the first kind frame structure of FDD (Frequency DivisionDuplex, Frequency Division Duplexing (FDD)) system and is applicable to the second class frame structure of TDD (Time Division Duplex, time division duplex) system.In order more deep understanding to be arranged, below will simply introduce respectively the first kind frame structure and the second class frame structure to the present invention.
As shown in Figure 1, be the first kind frame structure schematic diagram of FDD system in the prior art.The frame length of this first kind radio frames is 10ms, is made up of 20 time slots, and every time slot (slot) length is 0.5ms, as shown in Figure 1, and mark from 0 to 19.Two continuous time slot are defined as a subframe (subframe), and subframe i is made up of time slot 2i and 2i+1, i=0 wherein, and 1 ..., 9.
As shown in Figure 2, be the second class frame structure schematic diagram of TDD system in the prior art.The frame length of this second class radio frames also is 10ms, and every radio frames at first is divided into the field of 2 5ms.Each field is divided into the subframe of 5 1ms.According to concrete time slot ratio configuration, subframe 1 and subframe 6 can be configured to the particular service subframe, and (descending pilot frequency DwPTS, protection is GP and ascending pilot frequency UpPTS at interval) forms by 3 special time slots.Wherein, DwPTS is the same with common descending sub frame, also can be used for the bearing downlink business datum.
In LTE (Long Term Evolution) system, PRB (PhysicalResource Block based on common subframe, Physical Resource Block) structure is carried out the MCS design, utilizes the method for looking into TBS (TransportBlock Size, transmission block size) table to realize the AMC process again.Wherein, PRB is the base unit of the scheduling of resource of LTE.As shown in Figure 3, schematic diagram for PRB and RE in the prior art ascending time slot, PRB and RE in the descending time slot are similar with it, wherein, the least resource granularity that time domain OFDM (OrthogonalFrequency Division Multiplexing, OFDM) symbol and subcarrier in frequency domain are determined is called RE (Resource Element).At present, agreement is defined as time domain 0.5ms with the complete PRB of a common subframe, the running time-frequency resource granularity of frequency domain 180kHz, i.e. corresponding 7 the OFDM symbols of time domain (for short CP) or 6 OFDM symbols (for long CP), a running time-frequency resource granularity of 12 subcarriers of frequency domain correspondence.
Yet in the LTE system, the PRB resource that in some particular service subframes, also can have some brachymemmas (puncture), as the DwPTS (as shown in Figure 2) in the particular service subframe of TDD system, perhaps because synchronizing channel, broadcast channel are carried out the PRB of brachymemma etc.In these particular service subframes the PRB of brachymemma can with the complete the same bearing downlink data that are used for of PRB in the common subframe, but because existing TBS form is to design according to complete PRB, wherein most of option has no idea to directly apply to the PRB of these brachymemmas.
The shortcoming of prior art is: because the TBS table of agreement regulation is according to complete PRB design at present, wherein most of option is for brachymemma PRB and inapplicable., also,, then can cause having a long way to go the appearance that leads to errors simultaneously both for UE dispatches complete PRB for NodeB with actual required MCS if adopt the method the same to carry out AMC with complete PRB for the situation of its scheduling brachymemma PRB.
In order more deep understanding to be arranged to the above-mentioned shortcoming of prior art, below will be that example is simply introduced to the AMC of prior art, but the PRB that is understood that the following brachymemma of mentioning is a kind of situation that occurs in the prior art, can not represent the situation of the PRB of all brachymemmas in the prior art.At first, carry out the MCS design based on the PRB structure of common subframe, for the LTE system, Traffic Channel is supported QPSK at present, three kinds of modulation systems of 16QAM and 64QAM, these three kinds of modulation systems cooperate with the specific coding code check and have 29 kinds of MCS, implicit mapping TBS and modulation system when 3 kinds of MCS are preserved for retransmitting, totally 32 MCS options, it can be indicated by 5 bits.System selects best modulation system and channel encoding rate to transmit data according to measurement and prediction to channel, to be implemented in maximum system throughput under the prerequisite that guarantees certain transmission quality.The indication of concrete MCS can be carried out with reference to following table 1 and table 2.
Table 1 is the tabulation of MCS sequence number corresponding modulating mode and TBS sequence number
Wherein, the MCS indication information of 5 bits in dispatch indication sequence number I
MCS,, can obtain concrete modulation system such as Q according to table 1
mShown in, the sequence number of TBS is by I
TBSIndication.But concrete TBS needs by I
TBSWith the PRB number N that takies
PRBThe associating decision, PRB number N
PRBCan obtain according to the resource indication information of dispatch, scheduling is basic granularity with PRB-pair.Obtaining I according to table 1
TBSAfter, also need according to I
TBSWith PRB number N
PRBQuestion blank 2 obtains final TBS.The size of this table 2 is 27 * 110, but only shows N for convenience of description
PRBPart for 1-9.
Table 2 is the TBS table
TBS shown in the last table 2 table is to designing according to the complete PRB of general service, wherein, in order to consider to control the expense of signaling and pilot tone, and factor such as length CP, agreement is finally descending to be used to carry data according to every PRB to (PRB-pair) 120 RE, and wherein 120 RE are equivalent to 10 OFDM symbols.Therefore table 2 is also inapplicable for the PRB of brachymemma, especially when the symbolic number that cuts out is many, if determine according to table 2, then can cause having a long way to go with actual required MCS, causes the UE decoding error.
Below will be described above-mentioned defective by way of example, suppose that UE obtains I according to the descending scheduling signaling
MCS=14, the quantity that the PRB of indication is right is 2, and for the generic downlink subframe, the processing procedure of UE is as follows: according to table 1, according to I
MCS=14 table look-up obtains corresponding modulation system Q
m=4, i.e. 16QAM; TBS corresponding sequence number I
TBS=13; According to table 2, check in TBS=488 again.Then the chances are for Shi Ji code check: (488+24)/(120 * 4 * 2)=0.533, promptly Shi Ji MCS is { 16QAM, 0.533}.
If but that correspondence is DwPTS, be 9 OFDM symbols in this length of supposing DwPTS, so except the control signaling, outside the expense of synchronizing channel and pilot tone, the PRB that can be actually used in the carrying data among this DwPTS is roughly 5 * 12=60RE.Therefore if guarantee identical transmission quality, promptly MCS need be similarly that { 16QAM, 0.533} carrys 488 data bits, and NodeB (base station) then can be right for 4 PRB of this UE scheduling arrangement so.Yet the I that this moment, if UE indicated according to signaling
MCS=14 and N
PRB=4 what look into that TBS table obtains will be 1000 bits rather than 488 actual bits, thereby cause the operation of UE mistake.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solves and can't utilize existing MCS and TBS form in the prior art, the situation of dispatching complete PRB and brachymemma PRB for UE is simultaneously carried out the defective of AMC.
For achieving the above object, one aspect of the present invention proposes a kind of adaptive modulation and coding method, may further comprise the steps: sending node selects brachymemma Physical Resource Block PRB and complete PRB in order to transmitting downlink data; Described sending node is defined as the transmission block size TBS of described receiving node transmission according to institute's loaded service and is the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB; Described sending node is described receiving node scheduled transmission downlink data according to the TBS that determines, and right quantity, positional information and the MCS sequence number of total PRB that will adopt sends to described receiving node; Described receiving node calculates total resource quantity according to the situation of described total PRB right quantity, positional information and each brachymemma PRB; Described receiving node calculates the right quantity of complete PRB after the conversion according to total resource quantity, and according to right quantity of the complete PRB after the described conversion of calculating and the TBS that determines described downlink data by the TBS sequence number that described MCS sequence number is determined.
Wherein, described sending node is base station node B or evolution base station eNodeB, and described receiving node is via node RN or user equipment (UE); Perhaps described sending node is RN, and described receiving node is UE.
The present invention also proposes a kind of adaptive modulation and coding system, at least one receiving node that comprises the service of sending node and described sending node, described sending node, be used to select brachymemma PRB and complete PRB in order to transmitting downlink data, and be defined as the transmission block size TBS of described receiving node transmission and be the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB according to institute's loaded service, and be described receiving node scheduled transmission downlink data, and the right quantity of total PRB that will adopt according to the TBS that determines, positional information and MCS sequence number send to described receiving node; Described receiving node, be used for calculating total resource quantity according to the situation of described total PRB right quantity, positional information and each brachymemma PRB, and calculate the right quantity of complete PRB after the conversion, and according to the right quantity of the complete PRB after the described conversion of calculating with determine the TBS of described downlink data by the TBS sequence number that described MCS sequence number is determined according to total resource quantity.
The present invention also proposes a kind of sending node, comprises selecting module, scheduling parameter determination module, scheduling sending module, and described selection module is used to select brachymemma PRB and complete PRB in order to transmitting downlink data; Described scheduling parameter determination module is used for being defined as the transmission block size TBS of described receiving node transmission and being the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB according to institute's loaded service; Described scheduling sending module, being used for according to the TBS that determines is described receiving node scheduled transmission downlink data, and right quantity, positional information and the MCS sequence number of total PRB that will adopt sends to described receiving node.
The present invention also proposes a kind of receiving node, comprises receiver module, indication information acquisition module, complete PRB logarithm computing module and TBS determination module, and described receiver module is used to receive the downlink data of sending node by complete PRB and brachymemma PRB transmission; Described indication information acquisition module is used to obtain the MCS sequence number of dispatch indication and total right quantity of PRB, and wherein said total right quantity of PRB is the right quantity and the right quantity sum of brachymemma PRB of complete PRB of being dispatched; Described complete PRB logarithm computing module is used for calculating total resource quantity according to right quantity of described total PRB and the situation of each brachymemma PRB, and calculates the right quantity of complete PRB after the conversion according to total resource quantity; Described TBS determination module is used for according to right quantity of the complete PRB after the described conversion of calculating and the TBS that determines described downlink data by the TBS sequence number that described MCS sequence number is determined.Wherein, receiving node can be RN or UE.
Can be on the self-adaptive processing process and resource base of utilizing existing common subframe by the present invention, handles all or part of special circumstances during by brachymemma PRB transmitting downlink data, realize simply, efficiently.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the first kind frame structure schematic diagram of FDD system in the prior art;
Fig. 2 is the second class frame structure schematic diagram of TDD system in the prior art;
Fig. 3 is the schematic diagram of PRB and RE in the prior art ascending time slot;
Fig. 4 is the position view of main broadcast channel, auxiliary synchronous signals and master sync signal in the one embodiment of the invention FDD system;
Fig. 5 is the position view of main broadcast channel, auxiliary synchronous signals and master sync signal in the one embodiment of the invention TDD system;
Fig. 6 is the flow chart of one embodiment of the invention adaptive modulation and coding method;
Fig. 7 is the structure chart of one embodiment of the invention adaptive modulation and coding system.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
The present invention mainly is, utilize the self-adaptive processing process and the resource of existing common subframe, do not changing existing { TBS, MCS} form (as table 1 and table 2), and need not increases new { TBS into brachymemma PRB, on the basis of MCS} form,, solve in the prior art technological deficiency that can't realize AMC when the data of UE being dispatched situation on brachymemma PRB and complete PRB simultaneously for NodeB by the conversion of NodeB and corresponding UE to the right quantity of PRB.
Detailed process simply is described below: at first when NodeB is the UE scheduling resource, if NodeB is former because UE has selected brachymemma PRB and the common transmitting downlink data of complete PRB according to quality etc., then NodeB need be according to the size (as the ratio of OFDM symbolic number or the ratio of RE) of brachymemma PRB to complete PRB, with the right quantity N of complete PRB of NodeB scheduling
PRBThe quantity N right with brachymemma PRB
P-PRBSum N '
PRBAnd other relevant PRB information send to UE by dispatch, and wherein Xiang Guan PRB information comprises concrete PRB number and corresponding sequence number that carrying is this time transmitted.UE is according to the N ' in the dispatch
PRB(the quantity sum that complete PRB is right with brachymemma PRB) and the relevant described NodeB of PRB information calculations are total number of resources (for example OFDM symbolic number or RE number) of its scheduling, and UE calculates the right quantity N of complete PRB according to total number of resources
PRBThereby, can search that existing { TBS, the MCS} form carries out AMC.
What this also needed to further specify be, for the right quantity N of complete PRB
PRBRight quantity N with brachymemma PRB
P-PRBBetween conversion need consider the size (size of complete PRB is fixed) of brachymemma PRB, the therefore right quantity N of complete PRB
PRBRight quantity N with brachymemma PRB
P-PRBBetween the conversion relation can change because of the size of brachymemma PRB.Complete PRB as present agreement regulation comprises 120 RE (or comprising 10 OFDM symbols), if brachymemma PRB comprises 5 OFDM symbols, then N
P-PRB=2N
PRBIf brachymemma PRB comprises 30 RE, then N
P-PRB=2.5N
PRBTherefore, we are as can be seen along with the difference of brachymemma PRB size, and it also is different with conversion relation between the complete PRB number, and owing to causing that in the LTE system reason of brachymemma PRB is varied, causes the size of brachymemma PRB also to have nothing in common with each other, so N
PRBWith N
P-PRBBetween conversion relation in this application also can't be exhaustive; though the present invention can describe the main brachymemma PRB situation that exists in the LTE system in subsequent embodiment; yet therefore can not be and the present invention only is limited among the cited brachymemma PRB situation of the present invention, the situation of other brachymemmas PRB also should be protection range of the present invention and contains.In addition, also may carry out some and simplify handle when converting, but not rely on magnitude relationship between brachymemma PRB and the complete PRB fully, this type of conversion mode also should be protection range of the present invention and contains equally.
In order further understanding to be arranged to following embodiment of the present invention; at first main situation that causes the PRB brachymemma that exists and the size of corresponding brachymemma PRB thereof in the present LTE system are concluded; but what also need to illustrate once more is that the following scene of enumerating can not summarize that all cause the situation of PRB brachymemma in the present LTE system; other situations that cause the PRB brachymemma are similar with it; ordinary skill can be carried out similar processing to other brachymemma situations according to the present invention, also should be protection range of the present invention and contains.
1, the brachymemma PRB that produces by the length of DwPTS
The TDD system of LTE supports multiple particular service sub-frame configuration at present, DwPTS, and Gp and UpPTS take the 1ms time altogether.But under every kind of configuration, the length of DwPTS may be different, and according to present configuration, the possible length of DwPTS comprises:
Table 3 is the different special time slot configurations tabulations of DwPTS length down
According to the difference configuration of the length of above-mentioned table 3DwPTS, consider the expense of control signaling and pilot tone again, the OFDM symbolic number N that the PRB of brachymemma is right
Symbol, P-PRBAs shown in the table:
Table 4 is the right symbolic number tabulation of brachymemma PRB
| Type | Available OFDM symbolic number, L P-PRB | ??N symbol，P-PRB |
| Short CP1 | ??12 | ??8 |
| Short CP2 | ??11 | ??7 |
| Short CP3 | ??10 | ??6 |
| Short CP4 | ??9 | ??5 |
| Type | Available OFDM symbolic number, L P-PRB | ??N symbol，P-PRB |
| Short CP5 | ??3 | ??- |
| Long CP1 | ??10 | ??8 |
| Long CP2 | ??9 | ??7 |
| Long CP3 | ??8 | ??6 |
| Long CP4 | ??3 | ??- |
When being 12 OFDM symbolic numbers (correspondence table 4 short-and-medium CP1 situations), after the expense of removal control signaling and pilot tone, can be used for transmitting 8 the OFDM symbolic numbers that are about of data as DwPTS length for configuration in the table 3, so N
Symbol, P-PRB=8.Other situations in the table 4 are similar with it, do not repeat them here.
1, broadcasted and synchronizing channel influences the brachymemma PRB of generation
In FDD system and TDD system, broadcasted and understood with the influence of synchronizing channel that some is different, below will be introduced respectively in illustrated mode.
1) FDD system
As shown in Figure 4, be the position view of main broadcast channel, auxiliary synchronous signals and master sync signal in the one embodiment of the invention FDD system, this schematic diagram is an example to lack CP, and its length is totally 14 OFDM symbols, and long CP situation is similar with it, does not repeat them here.For 72 subcarriers (being equivalent to 6PRB) in the middle of FDD system subframe 0 and the subframe 5, because the existence of synchronizing channel or main broadcast channel causes can be used for transmitting the OFDM symbolic number minimizing of data.If for example control channel takies 2 sign resources, main broadcast channel takies 4 symbols, and auxiliary synchronous signals and master sync signal respectively take an OFDM symbol, and then to can be used for the OFDM symbolic number of transfer of data be 14-2-4-1-1=6 to each PRB.That is to say the system for FDD, its subframe 0 and subframe 5 are the particular service subframe, and its PRB is brachymemma.
For the situation of FDD system, available OFDM symbolic number L in subframe 0 and the subframe 5
P-PRB, and the corresponding OFDM symbolic number of brachymemma PRB N after consideration control signaling and the pilot-frequency expense
Symbol, P-PRBBe listed as follows:
Table 5 is the right symbolic number N of brachymemma PRB in the FDD system
Symbol, P-PRBTabulation
2) TDD system
As shown in Figure 5, be the position view of main broadcast channel, auxiliary synchronous signals and master sync signal in the one embodiment of the invention TDD system, this schematic diagram is an example to lack CP also equally, and its length is totally 14 OFDM symbols.But the difference of TDD system and above-mentioned FDD system is, master sync signal is not in subframe 0 and subframe 5, but in the DwPTS of subframe 1 and subframe 6.Therefore for the situation of TDD system, available OFDM symbolic number L in subframe 0, subframe 5 and the subframe 6
P-PRB, and the corresponding OFDM symbolic number of brachymemma PRB N after consideration control signaling and the pilot-frequency expense
Symbol, P-PRBBe listed as follows:
Table 6 is the right symbolic number N of brachymemma PRB in the TDD system
Symbol, P-PRBTabulation
3, the brachymemma PRB that produces by SRS (Sounding Reference Signaling, detecting pilot frequency signal)
If for sub-frame of uplink configuration transmitting SRS, then last OFDM symbol of the PRB of PUSCH will be struck off.But owing to only lose an OFDM symbol, the OFDM symbol that loses unlike preceding two kinds of situations is more, therefore it is not carried out emphasis in the present invention and describes.But the processing that those of ordinary skills can propose according to the present invention equally to above-mentioned two kinds of situations, the problem of the brachymemma PRB that solution SRS produces.
From the situation of above-mentioned cited generation brachymemma PRB as can be seen, can lose more OFDM symbolic number owing to be subjected to the brachymemma PRB of configuration of DwPTS length and broadcasting and synchronizing channel influence generation, its influence to system is also corresponding bigger, therefore as a preferred embodiment of the present invention, convert in order to raise the efficiency the situation of only considering above-mentioned several generation brachymemma PRB.But should be understood that other situations that produce brachymemma PRB also can solve with reference to the embodiment that the present invention proposes, because other situations that produce brachymemma PRB are more, therefore give unnecessary details at this no longer one by one.
Need to prove for embodiments of the invention, not only be suitable for base station node B or evolution base station eNodeB to the situation that UE sends, also be suitable for the situation that via node RN sends to UE, perhaps eNodeB is to the situation of RN transmission.To be that example is carried out concrete introduction to the situation that UE sends with NodeB in following examples, other above-mentioned situations can be carried out with reference to following examples, and in the following embodiments, sending node is NodeB, and receiving node is UE.
As shown in Figure 6, be embodiment of the invention adaptive modulation and coding method flow diagram, may further comprise the steps:
Step S601, NodeB are that UE selects brachymemma PRB and complete PRB transmitting downlink data.In one embodiment of the invention, every complete PRB is used to carry data to comprising 120 RE, and wherein 120 RE are equivalent to 10 OFDM symbols.Brachymemma PRB may be by the configuration of DwPTS length or broadcasting and synchronizing channel influence generation, and as described above in Example, the quantity of OFDM symbol or RE also exists difference among the brachymemma PRB that Different Effects produces, and does not repeat them here.
Step S602, NodeB are defined as the TBS of UE transmission according to institute's loaded service and are the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB.Wherein, according to the difference of institute's bearer service, its mode of determining transmission TBS size is also inequality.
For example for the business (for example VoIP business) of fixed data bag size, the TBS size of its transmission is fixing, can not cut apart, therefore need determine the TBS size, determine the concrete right quantity N of PRB that carries this data block according to TBS size and channel quality information again according to institute's loaded service
PRBAfterwards, NodeB according to institute can a scheduled resources be that UE selects complete PRB and brachymemma PRB transmitting downlink data, promptly NodeB for this UE has dispatched a part of complete PRB (N
PRB1), also dispatch a part of brachymemma PRB for this UE, can exist multiple varigrained PRB right among the brachymemma PRB in this section, for example can adopt to be broadcasted with synchronizing channel influences the brachymemma PRB of generation and/or the brachymemma PRB that is produced by the length of DwPTS, perhaps other brachymemmas PRB.Wherein, need obtain the right quantity of brachymemma PRB by conversion, for example for the brachymemma PRB that produces by the length of DwPTS, according to
Or
Wherein, N
PRBFor the right quantity of complete PRB (is removed the complete PRB (N of a part that has dispatched for this UE
PRB1) outside remaining), N
P-PRBFor converting the right quantity of back brachymemma PRB, N
Symbol, P-PRBBe OFDM symbolic number shared among the brachymemma PRB, N
RE, P-PRBBe RE number shared among the brachymemma PRB.The quantity that total PRB is right is the complete PRB (N of a part that dispatches for this UE
PRB1) and the right quantity N of conversion back brachymemma PRB
P-PRBSum.
Yet, business (for example data service) for fixed data bag size, its total volume of transmitted data is bigger, so needs cut apart according to the TBS that each transmission can be carried, so NodeB selects the TBS size according to channel quality information and energy scheduled resources.At first NodeB according to can scheduled resources determine the right quantity of quantity that the complete PRB of scheduling is right and brachymemma PRB after, suppose that NodeB is that to dispatch the right quantity of complete PRB be N to UE
PRB1, be the right quantity N of UE scheduling brachymemma PRB simultaneously
P-PRB, NodeB calculates right quantity of complete PRB and the right total right quantity of PRB of quantity sum of brachymemma PRB.The quantity N that NodeB is right to brachymemma PRB
P-PRBConvert and obtain converting the right quantity N of the complete PRB in back
PRB, afterwards again according to N
PRB1With N
PRBSum is tabled look-up and is obtained TBS, and the packet of scheduling TBS size transmits on the PRB that determines.Particularly, the relation of the conversion between the quantity that quantity that complete PRB is right and brachymemma PRB are right can be determined according to the size of brachymemma PRB.For example, can be according to formula
Or
Calculate.
Step S603, NodeB is a UE scheduled transmission downlink data according to the TBS that determines, and right quantity and the MCS sequence number of total PRB that will adopt, positional information and relevant system information send to UE.
Step S604, the quantity that UE is right according to total PRB, the situation of positional information and each brachymemma PRB is calculated total resource quantity.Particularly, UE can learn that according to positional information in the right quantity of total PRB, which PRB is brachymemma PRB, and which PRB is complete PRB, and calculates total resource quantity according to the situation of each brachymemma PRB.In one embodiment of the invention, a code word is scheduled in multiple varigrained PRB to carrying on the resource, that is to say that total like this resource quantity can be passed through formula for UE has dispatched multiple brachymemma PRB
Calculate, wherein, R
iBe the resource granularity of every kind of PRB, N
iBe the number of every kind of PRB, i=1 ... n, n are total right quantity of PRB, promptly for complete PRB, R
iBe 120 RE or 10 OFDM symbols, for brachymemma PRB, R
iBe variable, as previously mentioned, it can change because causing the situation difference of brachymemma PRB.
In another embodiment of the present invention, for the purpose of simplifying, can in the PRB of multiple granularity resource, determine the wherein resource of least resource granularity, and all total resource quantity be converted that for example total resource quantity can be formula R according to the situation of minimum PRB
Min* N
PRB, wherein, R
MinBe the PRB resource granularity of minimum particle size, N
PRBBe the right quantity of total PRB.Though sacrificed some precision like this, simplified calculating widely.As can be seen, can calculate total resource quantity in several ways under the situation that does not break away from inventive concept from foregoing description, other similar methods also should be included within protection scope of the present invention.
Step S605, UE calculates the right quantity of complete PRB after the conversion according to total resource quantity, and according to right quantity of the complete PRB after the conversion of calculating and the TBS that determines downlink data by the TBS sequence number that described MCS sequence number is determined.Particularly, in one embodiment of the invention, if total resource quantity is
Then the right quantity of complete PRB after the conversion can be
Wherein, R
0Be the right resource quantity of common PRB, 12 OFDM symbols or 120 RE, N ' can think in corresponding LTE system
PRBBe the right quantity of complete PRB after the conversion,
Expression rounds operation downwards to x.Afterwards, looking into the TBS that the MCS table is determined downlink data according to the right quantity of complete PRB after the conversion.In a preferred embodiment of the invention, for fear of N '
PRBValue is 0, and the quantity that the complete PRB after the conversion is right can also be expressed as
For simplifying the mode of handling in the foregoing description, the quantity that the complete PRB after the conversion is right can be expressed as
Wherein, R
MinBe the PRB resource granularity of minimum particle size, N
PRBBe the right quantity of total PRB, N '
PRBBe the right quantity of complete PRB after the conversion,
Expression rounds operation downwards to x.
Certainly in an embodiment of the present invention, also available other modes are calculated the right quantity of complete PRB after the conversion, as passing through formula N
p+ N '
PRBCalculate, wherein N
pFor the right quantity of complete PRB (is the N in the foregoing description
PRB1),
R
iBe the resource granularity of brachymemma PRB, N
iNumber for brachymemma PRB.
Certainly the right quantity of how calculating more than after the conversion of complete PRB only is the specific embodiment that the present invention proposes; the foregoing description that those skilled in the art can propose according to the present invention is made the calculating that is equal to, and these are equal to calculating and all should be included within protection scope of the present invention based on same invention thought.
As shown in Figure 7, be embodiment of the invention adaptive modulation and coding system construction drawing, this system comprises at least one UE 200 of NodeB 100 and NodeB 100 services.NodeB 100 is used to UE 200 to select complete PRB and brachymemma PRB transmitting downlink data, and be defined as the TBS of UE 200 transmission and be the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB according to institute's loaded service, and be UE 200 scheduled transmission downlink datas according to the TBS that determines, and right quantity and the MCS sequence number of total PRB that will adopt sends to UE 200.UE 200 is used for calculating total resource quantity according to the situation of the right quantity of total PRB and each brachymemma PRB, and according to the right quantity of complete PRB after total resource quantity calculating conversion, and the TBS that determines downlink data according to the TBS sequence number that the right quantity of the complete PRB after the described conversion of calculating is determined by described MCS sequence number.
Wherein, NodeB 100 comprises selection module 110, scheduling parameter determination module 120, scheduling sending module 130.Select module 110 to be used to UE 200 to select brachymemma PRB and complete PRB transmitting downlink data.Scheduling parameter determination module 120 is used for being defined as the transmission block size TBS of UE 200 transmission and being the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB according to institute's loaded service.It is UE 200 scheduled transmission downlink datas that scheduling sending module 130 is used for according to the TBS that determines, and right quantity and the MCS sequence number of total PRB that will adopt sends to UE 200.
Wherein, if 100 loaded service of NodeB are the VoIP business, then scheduling parameter determination module 120 is according to the professional definite TBS of VoIP, and determine the quantity that complete PRB is right according to TBS and the channel quality information determined, and can a scheduled resources be that UE 200 selects complete PRB and brachymemma PRB transmitting downlink data according to institute, and calculate the right quantity of brachymemma PRB and total right quantity of PRB, wherein right quantity conversion obtains the quantity that brachymemma PRB is right according to complete PRB.
Wherein, if 100 loaded service of NodeB are data service, then scheduling parameter determination module 120 according to can scheduled resources determine the right quantity and the right quantity of brachymemma PRB of complete PRB of scheduling, and calculate right quantity of complete PRB and the right total right quantity of PRB of quantity sum of brachymemma PRB, and the right quantity of brachymemma PRB converted obtain converting back complete PRB right quantity, tabling look-up according to the right quantity of complete PRB and the right quantity of the conversion complete PRB in back obtains TBS.
Wherein, in the above-described embodiments, the conversion relation between the right quantity of quantity that complete PRB is right and brachymemma PRB is determined according to the size of brachymemma PRB.
Wherein, UE 200 comprises receiver module 210, indication information acquisition module 220, complete PRB logarithm computing module 230 and TBS determination module 240.Receiver module 210 is used to receive the downlink data of NodeB 100 by brachymemma PRB and complete PRB transmission.Indication information acquisition module 220 is used to obtain the MCS sequence number of dispatch indication and total right quantity of PRB, and the quantity that wherein total PRB is right is the right quantity and the right quantity sum of brachymemma PRB of complete PRB of being dispatched.Complete PRB logarithm computing module 230 is used for calculating total resource quantity according to the situation of the right quantity of total PRB and each brachymemma PRB, and calculates the right quantity of complete PRB after the conversion according to total resource quantity.TBS determination module 240 is used for determining according to the TBS sequence number that the right quantity of the complete PRB after the conversion of calculating is determined by described MCS sequence number the TBS of described downlink data.
Wherein, in one embodiment of the invention, complete PRB logarithm computing module 230 calculates described total resource quantity according to following formula:
Wherein, R
iBe the resource granularity of every kind of PRB, N
iNumber for every kind of PRB; Again according to the right quantity of complete PRB after the following formula calculating conversion:
Or
Wherein, N '
PRBBe the right quantity of complete PRB after the conversion,
Expression rounds operation downwards to x.
Wherein, in another embodiment of the present invention, complete PRB logarithm computing module 230 calculates described total resource quantity: R according to following formula
Min* N
PRB, wherein, R
MinBe the PRB resource granularity of minimum particle size, N
PRBBe the right quantity of total PRB; Again according to the right quantity of complete PRB after the following formula calculating conversion:
R wherein
MinBe the PRB resource granularity of minimum particle size, N
PRBBe the right quantity of total PRB.
Wherein, in another embodiment of the present invention, complete PRB logarithm computing module 230 calculates the right quantity of complete PRB after the described conversion: N according to following formula
p+ N '
PRB, N wherein
pBe the right quantity of complete PRB,
R
iBe the resource granularity of brachymemma PRB, N
iNumber for brachymemma PRB.
Can be on the self-adaptive processing process and resource base of utilizing existing common subframe by the present invention, handles all or part of special circumstances during by brachymemma PRB transmitting downlink data, realize simply, efficiently.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (22)
1. an adaptive modulation and coding method is characterized in that, may further comprise the steps:
Sending node selects brachymemma Physical Resource Block PRB and complete PRB in order to transmitting downlink data;
Described sending node is defined as the transmission block size TBS of described receiving node transmission according to institute's loaded service and is the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB;
Described sending node is described receiving node scheduled transmission downlink data according to the TBS that determines, and right quantity, positional information and the MCS sequence number of total PRB that will adopt sends to described receiving node;
Described receiving node calculates total resource quantity according to the situation of described total PRB right quantity, positional information and each brachymemma PRB;
Described receiving node calculates the right quantity of complete PRB after the conversion according to total resource quantity, and according to right quantity of the complete PRB after the described conversion of calculating and the TBS that determines described downlink data by the TBS sequence number that described MCS sequence number is determined.
2. adaptive modulation and coding method according to claim 1, it is characterized in that, described sending node institute loaded service is the business of fixed data bag size, and described sending node is defined as the TBS of described receiving node transmission according to institute's loaded service and is that the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB comprises:
Described sending node is determined TBS according to institute's loaded service;
Described sending node is determined the right quantity of PRB of concrete this data block of carrying according to TBS that determines and channel quality information;
Described sending node can scheduled resources be that described receiving node is selected complete PRB and brachymemma PRB transmitting downlink data according to institute, and calculate the right quantity of brachymemma PRB and total right quantity of PRB, right quantity conversion obtains the right quantity of wherein said brachymemma PRB according to complete PRB.
3. adaptive modulation and coding method according to claim 1, it is characterized in that, described sending node institute loaded service is the business of on-fixed packet size, and described sending node is defined as the TBS of described receiving node transmission according to institute's loaded service and is that the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB comprises:
Described sending node according to can scheduled resources determine the right quantity and the right quantity of brachymemma PRB of complete PRB of scheduling;
Described sending node calculates right quantity of complete PRB and the right total right quantity of PRB of quantity sum of brachymemma PRB;
Described sending node is converted the right quantity of described brachymemma PRB and is obtained converting the right quantity of the complete PRB in back;
Described sending node is tabled look-up according to the right quantity of described complete PRB and the right quantity of the conversion complete PRB in back and is obtained TBS, and the packet of scheduling TBS size transmits on the PRB that determines.
4. as adaptive modulation and coding method as described in claim 2 or 3, it is characterized in that the conversion relation between the right quantity of quantity that described complete PRB is right and described brachymemma PRB is determined according to the size of brachymemma PRB.
5. adaptive modulation and coding method according to claim 1 is characterized in that, described receiving node calculates total resource quantity according to the situation of the right quantity of described total PRB and each brachymemma PRB and comprises:
Described total resource quantity calculates by following formula:
6. as adaptive modulation and coding method as described in the claim 5, it is characterized in that the right quantity of complete PRB that described receiving node calculates after the conversion according to total resource quantity comprises:
The quantity that complete PRB after the described conversion is right calculates by following formula:
7. adaptive modulation and coding method according to claim 1 is characterized in that, described receiving node calculates total resource quantity according to the situation of the right quantity of described total PRB and each brachymemma PRB and comprises:
Described total resource quantity calculates by following formula:
R
Min* N
PRB, wherein, described R
MinBe the PRB resource granularity of minimum particle size, N
PRBBe the right quantity of total PRB.
8. as adaptive modulation and coding method as described in the claim 7, it is characterized in that the right quantity of complete PRB that described receiving node calculates after the conversion according to total resource quantity comprises:
The quantity that complete PRB after the described conversion is right calculates by following formula:
R wherein
MinBe the PRB resource granularity of minimum particle size, N
PRBBe the right quantity of total PRB.
9. adaptive modulation and coding method according to claim 1 is characterized in that, the right quantity of complete PRB after the described calculating conversion comprises:
The quantity that complete PRB after the conversion is right is N
p+ N '
PRB, N wherein
pBe the right quantity of complete PRB,
Described R
iBe the resource granularity of brachymemma PRB, N
iNumber for brachymemma PRB.
10. as claim 1,2,3,5,6,7,8,9 adaptive modulation and coding method as described in each, it is characterized in that described sending node is base station node B or evolution base station eNodeB, described receiving node is via node RN or user equipment (UE); Perhaps described sending node is RN, and described receiving node is UE.
11. an adaptive modulation and coding system is characterized in that, comprises at least one receiving node of sending node and described sending node service,
Described sending node, be used to select brachymemma PRB and complete PRB in order to transmitting downlink data, and be defined as the transmission block size TBS of described receiving node transmission and be the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB according to institute's loaded service, and be described receiving node scheduled transmission downlink data according to the TBS that determines, and right quantity, positional information and the MCS sequence number of total PRB that will adopt sends to described receiving node;
Described receiving node, be used for calculating total resource quantity according to the situation of described total PRB right quantity, positional information and each brachymemma PRB, and calculate the right quantity of complete PRB after the conversion, and according to the right quantity of the complete PRB after the described conversion of calculating with determine the TBS of described downlink data by the TBS sequence number that described MCS sequence number is determined according to total resource quantity.
12. adaptive modulation and coding as claimed in claim 11 system is characterized in that described sending node is NodeB or eNodeB, described receiving node is RN or UE; Perhaps described sending node is RN, and described receiving node is UE.
13. a sending node is characterized in that, comprises selecting module, scheduling parameter determination module, scheduling sending module,
Described selection module is used to select brachymemma PRB and complete PRB in order to transmitting downlink data;
Described scheduling parameter determination module is used for being defined as the transmission block size TBS of described receiving node transmission and being the right quantity of total PRB of the right quantity sum of right quantity of the complete PRB that dispatched and brachymemma PRB according to institute's loaded service;
Described scheduling sending module, being used for according to the TBS that determines is described receiving node scheduled transmission downlink data, and right quantity, positional information and the MCS sequence number of total PRB that will adopt sends to described receiving node.
14. sending node as claimed in claim 13, it is characterized in that, if described sending node institute loaded service is the business of fixed data bag size, then described scheduling parameter determination module is determined TBS according to the business of fixed data bag size, and according to TBS that determines and the definite concrete right quantity of PRB of carrying this data block of channel quality information, and according to institute can a scheduled resources be that described receiving node is selected complete PRB and brachymemma PRB transmitting downlink data, and calculate the right quantity of brachymemma PRB and total right quantity of PRB, right quantity conversion obtains the right quantity of wherein said brachymemma PRB according to complete PRB.
15. sending node as claimed in claim 13, it is characterized in that, if described sending node institute loaded service is the business of on-fixed packet size, then described scheduling parameter determination module according to can scheduled resources determine the right quantity and the right quantity of brachymemma PRB of complete PRB of scheduling, and calculate right quantity of complete PRB and the right total right quantity of PRB of quantity sum of brachymemma PRB, and the right quantity of described brachymemma PRB converted obtain converting back complete PRB right quantity, tabling look-up according to the right quantity of described complete PRB and the right quantity of the conversion complete PRB in back obtains TBS, and the packet of scheduling TBS size transmits on the PRB that determines.
16., it is characterized in that the conversion relation between the right quantity of quantity that described complete PRB is right and described brachymemma PRB is determined according to the size of brachymemma PRB as claim 14 or 15 described sending nodes.
17., it is characterized in that described sending node is NodeB, eNodeB or RN as each described sending node of claim 13 to 15.
18. a receiving node is characterized in that, comprises receiver module, indication information acquisition module, complete PRB logarithm computing module and TBS determination module,
Described receiver module is used to receive the downlink data of sending node by complete PRB and brachymemma PRB transmission;
Described indication information acquisition module is used to obtain the MCS sequence number of dispatch indication and total right quantity of PRB, and wherein said total right quantity of PRB is the right quantity and the right quantity sum of brachymemma PRB of complete PRB of being dispatched;
Described complete PRB logarithm computing module is used for calculating total resource quantity according to right quantity of described total PRB and the situation of each brachymemma PRB, and calculates the right quantity of complete PRB after the conversion according to total resource quantity;
Described TBS determination module is used for according to right quantity of the complete PRB after the described conversion of calculating and the TBS that determines described downlink data by the TBS sequence number that described MCS sequence number is determined.
19. receiving node as claimed in claim 18 is characterized in that, the quantity computing module that described complete PRB is right calculates described total resource quantity according to following formula:
Wherein, described R
iBe the resource granularity of every kind of PRB, N
iNumber for every kind of PRB;
Again according to the right quantity of complete PRB after the following formula calculating conversion:
20. receiving node as claimed in claim 18 is characterized in that, the quantity computing module that described complete PRB is right calculates described total resource quantity according to following formula:
R
Min* N
PRB, wherein, described R
MinBe the PRB resource granularity of minimum particle size, N
PRBBe the right quantity of total PRB;
Again according to the right quantity of complete PRB after the following formula calculating conversion:
21. receiving node as claimed in claim 18 is characterized in that, described complete PRB logarithm computing module calculates the right quantity of complete PRB after the described conversion according to following formula:
N
p+ N '
PRB, N wherein
pBe the right quantity of complete PRB,
Described R
iBe the resource granularity of brachymemma PRB, N
iNumber for brachymemma PRB.
22., it is characterized in that described receiving node is RN or UE as claim 18-21 adaptive modulation and coding method as described in each.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910083116 CN101877626B (en) | 2009-04-30 | 2009-04-30 | Adaptive modulation and coding method, system and device |
| MX2011001043A MX2011001043A (en) | 2008-07-30 | 2009-07-30 | Method, system and device for adaptive modulation and coding. |
| ES09802432.6T ES2609004T3 (en) | 2008-07-30 | 2009-07-30 | Adaptive modulation and coding procedures and devices |
| JP2011520312A JP5260742B2 (en) | 2008-07-30 | 2009-07-30 | Adaptive modulation and coding method, system and apparatus |
| US13/056,890 US8441999B2 (en) | 2008-07-30 | 2009-07-30 | Method, system and device for adaptive modulation and coding |
| EP09802432.6A EP2315369B1 (en) | 2008-07-30 | 2009-07-30 | Methods and devices for adaptive modulation and coding |
| KR1020117004825A KR101289261B1 (en) | 2008-07-30 | 2009-07-30 | Method, system and device for adaptive modulation and coding |
| PCT/CN2009/073008 WO2010012239A1 (en) | 2008-07-30 | 2009-07-30 | Method, system and device for adaptive modulation and coding |
| US13/874,070 US9060363B2 (en) | 2008-07-30 | 2013-04-30 | Method, system and device for adaptive modulation and coding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910083116 CN101877626B (en) | 2009-04-30 | 2009-04-30 | Adaptive modulation and coding method, system and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101877626A true CN101877626A (en) | 2010-11-03 |
| CN101877626B CN101877626B (en) | 2013-02-13 |
Family
ID=43020099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910083116 Active CN101877626B (en) | 2008-07-30 | 2009-04-30 | Adaptive modulation and coding method, system and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101877626B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014012423A1 (en) * | 2012-07-19 | 2014-01-23 | 电信科学技术研究院 | Method and device for data transmission |
| CN104038970A (en) * | 2013-03-05 | 2014-09-10 | 电信科学技术研究院 | Communication processing method and equipment |
| CN108551381A (en) * | 2013-01-09 | 2018-09-18 | 高通股份有限公司 | Identification modulation and encoding scheme and channel quality indicator |
| CN109076389A (en) * | 2016-04-08 | 2018-12-21 | 株式会社Ntt都科摩 | User terminal and wireless communications method |
| CN113507298A (en) * | 2021-07-09 | 2021-10-15 | 磐基技术有限公司 | Modulation mode self-adaptive adjusting method and system based on channel quality detection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060115293A (en) * | 2005-05-04 | 2006-11-08 | 삼성전자주식회사 | Configuration and managing apparatus and method of channel in ofdma system and transmitting/receiving method and apparatus thereof |
-
2009
- 2009-04-30 CN CN 200910083116 patent/CN101877626B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014012423A1 (en) * | 2012-07-19 | 2014-01-23 | 电信科学技术研究院 | Method and device for data transmission |
| CN108551381A (en) * | 2013-01-09 | 2018-09-18 | 高通股份有限公司 | Identification modulation and encoding scheme and channel quality indicator |
| CN108551381B (en) * | 2013-01-09 | 2021-03-16 | 高通股份有限公司 | Identifying modulation and coding schemes and channel quality indicators |
| CN104038970A (en) * | 2013-03-05 | 2014-09-10 | 电信科学技术研究院 | Communication processing method and equipment |
| CN104038970B (en) * | 2013-03-05 | 2017-12-19 | 电信科学技术研究院 | A kind of communication processing method and equipment |
| CN109076389A (en) * | 2016-04-08 | 2018-12-21 | 株式会社Ntt都科摩 | User terminal and wireless communications method |
| CN109076389B (en) * | 2016-04-08 | 2022-08-23 | 株式会社Ntt都科摩 | User terminal and wireless communication method |
| CN113507298A (en) * | 2021-07-09 | 2021-10-15 | 磐基技术有限公司 | Modulation mode self-adaptive adjusting method and system based on channel quality detection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101877626B (en) | 2013-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101640579A (en) | Self-adaptive modulating and coding method, system and device | |
| CN101651515A (en) | Method, system and device for adaptive modulation and coding | |
| EP3100391B1 (en) | Systems and methods utilizing an efficient tbs table design for 256qam in a cellular communications network | |
| KR101289261B1 (en) | Method, system and device for adaptive modulation and coding | |
| CN1134927C (en) | A method for selecting a link protocol for a transparent data service in digital communications system | |
| US8195186B2 (en) | Resource allocation | |
| CN106572539B (en) | System and method for uplink signaling | |
| EP2232750B1 (en) | System and method for modulation scheme changes | |
| CN102651662B (en) | Method and device for information transmission | |
| EP2462770B1 (en) | Frame mapping for geran voice capacity enhancement | |
| EP2293635A1 (en) | Radio communication system, mobile station device, and radio reception method | |
| US9839039B2 (en) | 256 quadrature amplitude modulation user equipment category handling | |
| CN102447538A (en) | Transmission method of downlink control information and system thereof | |
| CN102273098A (en) | Device and method for transmitting downlink control information in a wireless communication system | |
| CN102263616A (en) | Method and device of indicator control channel | |
| CN104052572A (en) | Downlink transmission method and user terminal equipment | |
| US20100135222A1 (en) | Resource allocation | |
| WO2015114541A1 (en) | 256 quadrature amplitude modulation user equipment category handling | |
| CN102938934A (en) | Resource allocation method and device of control channel information | |
| CN101877626B (en) | Adaptive modulation and coding method, system and device | |
| JPWO2017051660A1 (en) | Base station apparatus, terminal apparatus and communication method | |
| WO2017051659A1 (en) | Base station device, terminal device, and communication method | |
| WO2016179805A1 (en) | Data transmission method and apparatus | |
| CN101686101A (en) | Transmission method and device of multi-user joint mapping configuration | |
| WO2005076511A1 (en) | Link adaptation in a mobile communication network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110402 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 29, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100191 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110402 Address after: 100191 Haidian District, Xueyuan Road, No. 40, Applicant after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100083 Haidian District, Xueyuan Road, No. 29, Applicant before: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20210611 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right |