CN102843214B - The method and apparatus of data and control information is send/receive in wireless communication system - Google Patents
The method and apparatus of data and control information is send/receive in wireless communication system Download PDFInfo
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- CN102843214B CN102843214B CN201210293613.XA CN201210293613A CN102843214B CN 102843214 B CN102843214 B CN 102843214B CN 201210293613 A CN201210293613 A CN 201210293613A CN 102843214 B CN102843214 B CN 102843214B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2621—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using frequency division multiple access [FDMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2612—Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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Abstract
Disclose a kind of for multiplexed and send data and uplink control information and receive the method and apparatus of described data and control information in a wireless communication system.Within the system, multiplexed uplink packet data channel and control channel.Transformat for the control channel of the transmission of described control information is variable according to the transformat of described data channel.Disclosed method and apparatus can control the resource quantity of described control channel when sending high-speed data, and therefore, it is possible to effectively utilizes described data channel resource.
Description
The divisional application that this case is the applying date is on December 18th, 2007, application number is 200780042579.6, denomination of invention is the application for a patent for invention of " method and apparatus that be send/receive data and control information in wireless communication system by up link ".
Technical field
The present invention relates to wireless communication system, and more specifically, relate to the method and apparatus sending data channel and control channel in identical Transmission Time Interval.
Background technology
Usually, the transmission plan adopted in single-carrier frequency division multiple access (SC-FDMA) system (its example being wireless communication system) comprises distributed FDMA(DistributedFDMADFDMA) scheme and local formula FDMA(LocalizedFDMALFDMA).
Fig. 1 is the structured flowchart for illustration of the transmitter in typical LFDMA system.The transmitter of other type can be used, also can use the transmitter shown in Fig. 1.Transmitter shown in Fig. 1 comprises discrete Fourier transform (DFT) (DFT) precoder 101 and inverse fast fourier transform (IFFT) unit 102.Implement the DFT precoder 101 shown in Fig. 1 and IFFT unit 102 make easily to carry out the change of LFDMA system parameters and there is no high hardware complexity.
Difference between OFDM and SC-FDMA is discussed in the structure chart of transmitter.Further, IFFT unit 102 is for multi-carrier transmission in typical OFDM transmitter, and LFDMA transmitter additionally comprises the DFT precoder 101 being connected to IFFT unit 102 input side.M the subcarrier output from precoder 101 is mapped to input point N-M to the N-1 of IFFT unit 102, occupies the wavestrip that (occupy) configured by adjacent subcarrier and sent by this wavestrip to make them.Usually, the value of the I/O size N of IFFT unit 102 is greater than the value of the I/O size M of DFT precoder 101.The output signal of IFFT unit 102 is being sent out after also-string (P/A) transducer 104 and Cyclic Prefix (CP) adder 106.
In an uplink transmission, should to be comprised by the control information that control channel sends by subscriber equipment (UE) and confirm/deny (ACK/NACK) or the mainly necessary CQI of communicating downlink grouped data (CQI).
Fig. 2 illustrates the transmission of control information in typical SC-FDMA system.
With reference to Fig. 2 (a), the frequency resource 201 of the separation of the resource of different pieces of information channel is assigned in control channel, to send control information in SC-FDMA system.When passing through distributed frequency resource 201 and sending control information, UE can not send grouped data.This is because send the characteristic that grouped data and control information can not meet single carrier in identical transmission intercal simultaneously, it causes the increase of peak-toaverage ratio (PAPR).
Therefore, when needing UE to send control information in for the transmission intercal of packet data transmission, sent control information together with data by the frequency resource 203 of the data channel shown in Fig. 2 (b).In other words, grouped data, control information and reference signal are time multiplexing and send in identical frequency resource 203.
Fig. 3 illustrates in typical SC-FDMA system for multiplexed before grouped data and control information are input to DFT precoder and send their structured flowchart of transmitter.As shown, the data 301 comprising p code element number and the control information 302 comprising S code element are multiplexed into M code element by multiplexer 303, and it is then imported into has the DFT precoder 304 that size is M.As mentioned above, the output of DFT precoder 304 is mapped as and has the input that size is the IFFT305 of N.
As shown in Figure 3, when grouped data multiplexed before DFT precoder and control information, need M the input symbols carrying out allocation schedule according to the information content of each of data channel and control channel.According to a typical scenario, such as Wideband Code Division Multiple Access (WCDMA) (WCDMA) scheme, input symbols is distributed according to the transformat arranged of each of control channel and data channel.In other words, when arranging number of symbols according to the fixing transformat of control channel, other input symbols except the code element of control channel are used to transfer of data.This is because typically, the data rate of data channel can change according to scheduling, and the transformat of control channel is arranged regularly by the signaling of higher level.
But, when the transformat of control channel is as mentioned above for time fixing, from the code element can transmitted by Packet Data Channel, decrease code element as many with the code element shared by control channel, to reduce data rate.At this moment, data rate is lowered the amount corresponding with [code element number × modulation that control channel uses and encoding scheme (MCS) grade].Therefore, when UE has obtained the high MCS grade of dispatching for high speed data transfer, due to the transmission of control information, the data bit number be not sent out may be increased.
Summary of the invention
Technical problem
Therefore, make the present invention and occur in the problems referred to above of the prior art to solve, and the invention provides a kind of method and apparatus controlling the resource quantity used in control channel in a wireless communication system according to the data rate of UE.
In addition, the invention provides a kind of basis controls the resource quantity of control channel method and apparatus based on the transformat that the data rate that the data rate dispatched or UE will use will use.
In addition, the invention provides a kind of method and apparatus sent control information by use and the modulation scheme identical for the modulation scheme of transfer of data that UE uses.
In addition, the invention provides a kind of transformat according to data channel to calculate the method and apparatus transmitting necessary modulated symbol number for control information.
In addition, the invention provides a kind of in SC-FDMA system for multiplexed and send the method and apparatus of UE of data channel and control channel.
In addition, the invention provides a kind of in SC-FDMA system for receiving the method and apparatus of the Node B through multiplexed data channel and control channel.
Technical scheme
According to an aspect of the present invention, provide a kind of method sending data and control information in a wireless communication system, the method comprises: determine by the given control channel form of the transformat for data channel; Transformat according to data channel produces data; Control information is produced according to determined control channel form; Multiplexed data and control information, and sent through multiplexed data and control information by the subcarrier resources being allocated for data channel.
According to a further aspect in the invention, provide a kind of subscriber equipment (UE) equipment sending data and control information in a wireless communication system, this UE equipment comprises: controller, for determining the control channel form that the transformat that used by data channel is given; Data producer, produces data for the transformat according to data channel; Control information generator, for producing control information according to determined control channel form; And transmission unit, for multiplexed data and control information, and sent through multiplexed data and control information by the subcarrier resources being allocated for data channel.
According to another aspect of the invention, provide a kind of method receiving data and control information in a wireless communication system, the method comprises: receive by the subcarrier resources being allocated for data channel the uplink signal comprising data and control information; Determine the control channel form that the transformat that used by data channel is given; And separate multiplexed uplink signal according to the transformat of control channel form and data channel, to obtain data and control information.
In accordance with a further aspect of the present invention, a kind of node b apparatus receiving data and control information is in a wireless communication system provided, this node b apparatus comprises: receiving element, receives the uplink signal comprising data and control information for the subcarrier resources by being allocated for data channel; Controller, for determining the control channel form that the transformat that used by data channel is given; And demultiplexer, for separating multiplexed uplink signal according to the transformat of control channel form and data channel, to obtain data and control information.
Beneficial effect
The present invention has following effect.
Using in the wireless communication system according to single-carrier frequency division multiple access scheme of the present invention, the multiplexed control information for ul transmissions and data to meet the characteristic of single carrier, thus reduce PAPR.
Accompanying drawing explanation
Below in conjunction with in the specific descriptions of accompanying drawing, the aspect of above and other of the present invention, feature and advantage will be more obvious, wherein:
Fig. 1 is the block diagram of the structure of the transmitter illustrated in typical LFDMA system;
Fig. 2 A and 2B illustrates the transmission of control information in typical SC-FDMA system;
Fig. 3 to illustrate in typical SC-FDMA system their block diagram of structure of transmitter multiplexed before grouped data and control information are input to DFT precoder;
Fig. 4 illustrates the flow chart being sent the process of data and control information by UE according to the present invention first one exemplary embodiment;
Fig. 5 illustrates the flow chart simultaneously being received the process of data and control information by Node B according to the present invention first one exemplary embodiment;
Fig. 6 is the block diagram of the transmitting apparatus of the UE illustrated according to the present invention first one exemplary embodiment;
Fig. 7 is the block diagram of the receiving equipment of the Node B illustrated according to the present invention first one exemplary embodiment;
Fig. 8 illustrates the flow chart being sent the process of data and control information by UE according to the present invention second one exemplary embodiment;
Fig. 9 illustrates the flow chart simultaneously being received the process of data and control information by Node B according to the present invention second one exemplary embodiment;
Figure 10 is the block diagram of the transmitting apparatus of the UE illustrated according to the present invention the 3rd one exemplary embodiment;
Figure 11 is the block diagram of the receiving equipment of the Node B illustrated according to the present invention the 3rd one exemplary embodiment;
Figure 12 illustrates the flow chart being sent the process of data and control information by UE according to the present invention the 4th one exemplary embodiment;
Figure 13 illustrates the flow chart simultaneously being received the process of data and control information by Node B according to the present invention the 4th one exemplary embodiment;
Figure 14 is the block diagram of the transmitting apparatus of the UE illustrated according to the present invention the 4th one exemplary embodiment; And
Figure 15 is the block diagram of the receiving equipment of the Node B illustrated according to the present invention the 4th one exemplary embodiment.
Embodiment
Below, one exemplary embodiment of the present invention is described with reference to the accompanying drawings.In the following description, the detailed description of known function and the configuration be herein incorporated will be omitted, because it makes flesh and blood of the present invention unclear.
When sending data and control information in a wireless communication system during a time interval simultaneously, the present invention changes the resource quantity used by control channel according to data rate, to obtain effective use of transfer resource.As used herein, a time interval is called Transmission Time Interval (TTI).
Data rate is often referred to the quantity of the information data that generation sends during unit interval.But as the expansion of the present invention's design, data rate can refer to the size that UE sends the Radio Resource quantity required for information data.In other words, the data rate in the present invention is appreciated that the size referring to transmission power level that during unit interval (that is, between haplophase in transmission time) sent by UE or transmitted bit.The size of transmitted bit refers to the size of the transmission block indicated by transformat or the number of modulated symbol within the physical layer or the number of physical layer bit.Transmission power level refers to the power sent by UE, it can represent absolute transmitted power, or send corresponding data quantity necessary, relative to reference power level additional transmission power level (namely, power excursion), reference power level is the necessary power grade of transfer of data actual after compensating the bad channel XOR path loss difference between UE.Secondary power grade has and is equal to the meaning that Node B normally receives the necessary signal to noise ratio (snr) of corresponding data quantity.
For this reason, the present invention substantially provides a kind of and selects the method for the transformat of control channel (TF) (hereinafter, also referred to as control channel form) according to data rate and during the identical time interval, send/receive data and have the equipment of control information of variable TF.In addition, the invention provides a kind of method for defining another control channel form based on data rate, computational methods wherein and the method by using all the other resources except selected control channel resource to send data.
An important characteristic of the present invention is to determine control channel form, such as send control information the number of symbols of necessary control channel, bit number or modulation scheme, wherein, when transmitting control channel separately, the form using preset format or arranged by higher level signaling, and when transmitting control channel together with data, determine control channel form based on the transformat of the data channel in each TTI or data rate.As used herein, each code element refers to modulated multiple code element, and it is mapped to a transmission unit, such as a subcarrier or subband.
Embodiments of the invention described below correspond to the necessary power grade of usage data channel, use the transformat index indicating the data bulk that can transmit and the modulation scheme using designation data channel and code rate as the situation of the transformat of data channel and the MSC grade of data rate.But, even if do not mention especially wherein in this manual, but the technical staff of in this area is explained, the information of the transformat of identification data channel or any type of data rate can be used in the transformat determining control channel by it.In addition, although the description below of the present invention is the up link based on the wireless communication system that uses SC-FDMA scheme, self-evidently, such certain system configurations does not limit the scope of the invention.
first embodiment
UE arranges the form of multiple control channel at first according to the code rate of designation data and the MCS grade of modulation scheme, and the control channel form then selected by the MCS grade based on the data channel sent in each TTI arranges control channel.As used herein, MCS grade refers to the combination of code rate for transfer of data and modulation scheme (such as, Quadrature Phase Shift Keying (QPSK) scheme, 16-road quadrature amplitude modulation (16QAM) scheme).MCS higher grade, and data rate is higher.That is, when usage data transmits multiplexed control information, the coding of control information is provided by the modulation scheme transmitted for uplink data channel and code rate.
According to the first embodiment of the present invention, for convenience of description, by the code element number of the control channel obtained after modulation to define the form of control channel.According to another embodiment of the present invention, the transformat of control channel can be defined by least one in the middle of the parameter of such as MCS grade, physical layer bit number order and code rate.
When sending data by low MCS grade, the allowed power grade for each modulated symbol is also low.Therefore, a large amount of modulated symbols is used for the transmission of control information, to obtain the energy grade meeting the quality of reception.When sending data by high MCS grade, UE has good channel condition and can distribute high power grade for each modulated symbol.Therefore, namely use a small amount of modulated symbol to send control information, also can obtain the energy grade of the quality of reception of satisfying the demand.
Following table 1 illustrates multiple examples of control channel formatting, wherein, S_ori represents when not sending data when only sending control information, for the code element number (raw symbol number) of control information, and S represents when sending control information together with data, for the code element number of control information.According to another embodiment, S_ori can have available signal notice value or by designer's predetermined value.
Table 1
In the example 2 of the code element number for control channel, when only sending control information (not sending data), when using low MCS grade to send data, data and control information use identical form, and when using high MCS grade to send data, use the form for control information (S_add) arranged in addition.As used herein, the value of S_add is less than the value of S_ori.
In the example 3 of the code element number for control channel, when usage data through-put power, need and the as many code element of code element number that can meet whole energy, to transmit control channel and data channel simultaneously.Therefore, the number S of control channel code element is determined by the original number S_ori carrying out convergent-divergent control channel code element according to power ratio, by this way, when data transmission utilization measure is set to larger than the power in situation about only transmitting control channel, use the code element number S being less than the original number S_ori of control channel code element, and when data transmission utilization measure is set to less than the power in situation about only transmitting control channel, use the code element number S being greater than the original number S_ori of control channel code element.Here, power spectrum density controls (PSD_control) and refers to the necessary power grade of only transmitting control channel, and PSD_n refers to for the necessary power grade of transmission according to the n-th data channel transmission form.The format information of indicator control channel code element number can or pre-define in a standard or be arranged by higher level signaling.
Fig. 4 illustrates the flow chart being sent the process of data and control information by UE according to the first one exemplary embodiment of the present invention.
With reference to Fig. 4, in step 401, when the control information having occurred being sent out in identical TTI and data, in step 402, UE identifies the MCS grade the control channel form of selection given by MCS grade that are used for data channel.Then, in step 403, UE by controlling time of reception or the code rate of control information according to the code element number S of control channel form, thus produces the control information comprising S code element.When code rate is fixed, UE performs the rate-matched for the control information inputted in the mode similar to the mode of data, thus produces and corresponding with wanting the reality code element number S-phase that send comprise the control information that S controls code element.
Then, in step 404, the code element number P of UE calculated data channel.Here, code element number P(P=M-S for data channel is obtained by deducting control channel code element number in the whole code element number M from the resource according to scheduling).Below, in step 405, the data including P code element are produced.Particularly, UE by according to the code element number P of the corresponding data channel of the quantity of physical layer for transmission can perform rate-matched and modulation, produce the data including P code element.In a step 406, the data that multiplexed and transmission produces and control information.
For generation of the step 404 and 405 and can not only perform with the order illustrated for generation of the step 403 of control information of data, and also can be performed in reverse order or simultaneously.
Fig. 5 illustrates the flow chart simultaneously being received the process of data and control information by Node B according to the first one exemplary embodiment of the present invention.
With reference to Fig. 5, in step 501, Node-B receiver signal, wherein control information and data are multiplexed by predetermined frequency resource.UE periodically sends CQI, and only when receiving down link data, sends ACK/NACK information.Therefore, Node B knows the time interval of the signal containing data and control information for receiving package exactly.In step 502, Node B selects control channel form.Particularly, Node B is selected and is passed through to dispatch the corresponding control channel form of determined MCS grade.Node B notifies the MCS grade by the determined data channel of schedule information to UE, and UE sends data by using the MCS grade identical with the MCS grade that Node B is dispatched.Therefore, always identical with the control channel form that UE uses by Node B.
In step 503, the code element number P of Node B by using the code element number of the control channel form selected to obtain data channel.Then, in step 504, Node B separates the multiplexed signal received by using the code element number of control channel and data channel, thus the Received signal strength comprising M code element is divided into P data channel symbols and S control channel code element.In step 505 and 506, Node B demodulation the code element of each channel of decoding and then export pure data and control information.Wherein, step 505 and 506 can not only perform with illustrated order, and also can perform in reverse order or simultaneously.
Fig. 6 is the block diagram of the transmitting apparatus of the UE illustrated according to the first one exemplary embodiment of the present invention.
With reference to Fig. 6, the MCS information received also then is sent to control channel controller 604 by the MCS information that data rate controller 601 is dispatched by Node B from Node-B receiver by independent channel (such as, scheduling channel).When there is the control information that will be sent out, based on such as above-mentioned table 1, the code element number S of the control information corresponding with the MCS grade of the data channel indicated by MCS information determined by control channel controller 604.Control information generator 603 also then performs the modulation, rate-matched, coding etc. of input information bits from the code element number S of control channel controller 604 receiving control information, thus produces S the control code element comprising control information.
If control channel controller 604 is to the code element number S of data rate controller 601 transmitting control information, then data rate controller 601 calculates based on the code element number S of control information the code element number P that can be used for transfer of data.Data producer 602, based on the code element number P of the data transmitted from data rate controller 601, produces by the modulation, rate-matched, coding etc. of input information bits the data including P data symbols.
The data symbols produced is multiplexed by multiplexer 605 with control code element, and DFT precoder 606 produces by performing DFT to M the code element exported from multiplexer 605 frequency-region signal comprising SC-FDMA code element.Then, frequency-region signal is mapped to distributed subcarrier by IFFT unit 607, thus frequency-region signal is converted to the time-domain signal that will be sent out.
Fig. 7 is the block diagram of the receiving equipment of the Node B illustrated according to the first one exemplary embodiment of the present invention.
With reference to Fig. 7, Node B obtains the signal of the particular UE comprising M code element by processing the signal received by FFT unit 707 and IDFT unit 706 during a TTI.Then, the Signal separator of UE is data-signal and control signal by demultiplexer 705.At this moment, the code element number shared by each channel is notified from scheduler 701.
That is, scheduler 701 is determined the MCS grade of data channel and is transmitted the MCS information of instruction MCS grade to control channel controller 704.When there is the control information that will be sent out, the code element number S used in the control channel of UE determined by control channel controller 704 based on the MCS grade indicated by MCS information, and the code element number S of control channel is sent to scheduler 701.Scheduler 701 ascertains the number P, number P be by from corresponding to distribute to UE whole resources code element number M in propose number S to obtain, as the code element number for transfer of data, the number P that scheduler 701 sends data channel symbols is to data demodulator 702 and then to code element number P and S of demultiplexer 705 notification data channel and control channel.
The code element number P of scheduler 701 notification data demodulator 702 data channel, data demodulator 702 according to the demodulation scheme of corresponding MCS grade and code rate, the code element of the data channel that rectification decoding are separated by demultiplexer 705.For this reason, scheduler 701 provides the number of data channel symbols and the information for concrete operations to data demodulator 702.Control channel controller 704 notifies the number S of control information demodulator 703 control channel code element, control information demodulator 703 is according to the demodulation scheme of correspondence and code rate, the code element of the control channel that rectification decoding are separated by demultiplexer 705, thus obtain the control information of such as ACK/NACK or CQI.
second embodiment
According to a second embodiment of the present invention, after the modulation scheme modulation control channel identical with the modulation scheme of data channel, UE transmits control channel, to reach effective utilization of resource.According to prior art, owing to being difficult to change control channel form continually according to the channel position of UE, therefore UE uses fixing low form to be used for control channel to ensure reliability.But due to the immediately data dispatching channel of the channel condition information based on UE, Node B can arrange high data rate or low data rate changeably according to the channel status of UE.When Node B is the high data rate of data channel assignment, the channel condition that corresponding UE is in can be determined or there is enough through-put powers.Therefore, high through-put power also can be used to transmit control channel.Therefore, according to a second embodiment of the present invention, carry out modulation control information according to the modulation scheme identical with the modulation scheme of data, and be used for the code element number of control information according to this modulation control.
In order to implement the second embodiment better, as following table 2 defines the modulation scheme of each data channel and the modulation scheme of each control channel
Table 2
| Data channel modulation scheme | Control channel modulation scheme |
| QPSK | QPSK |
| 16QAM | 16QAM |
Fig. 8 illustrates the flow chart being sent the process of data and control information by UE according to the second one exemplary embodiment of the present invention.
With reference to Fig. 8, in step 801, when there is the control information and data that will be sent out in identical TTI, in step 802, UE identifies the modulation scheme indicated by the MCS grade of data channel.Description be below use wherein comprise QPSK scheme and 16QAM scheme the situation of two schemes as the modulation scheme of data channel in provide.But self-evidently, the present invention can be applied in the other situation using other modulation scheme.
When the modulation scheme of data channel is QPSK scheme, UE proceeds to step 803, and wherein UE also selects according to the control information of QPSK modulating scheme the code element number S corresponding to QPSK scheme
qpskthe necessary code element number S of transmission as control channel.On the contrary, when the modulation scheme of data channel is 16QAM scheme, UE proceeds to step 804, and wherein UE also selects according to the control information of 16QAM modulating scheme the code element number S corresponding to 16QAM scheme
qamthe necessary code element number S of transmission as control channel.The bit number of the control information before chnnel coding is known, and the bit number of usual QPSK scheme is the twice of the bit number that can be sent out when 16QAM scheme.Therefore, when using 16QAM scheme, control channel transmits necessary code element number S
qambe reduced to code element number S in the situation of QPSK scheme
qpskhalf.
In step 805, the code element number P of UE calculated data channel, to produce data channel.For data channel code element number P with from according to the value corresponding (P=M-S) deducting control channel code element number S in whole code element number M of the resource of dispatching and obtain.In step 806, UE through-rate coupling produces and comprises the data of P code element, and then multiplexed in step 807 and send data and the control information of generation.For generation of the step 805 and 806 and can not only perform with illustrated order for generation of the step 803 or 804 of control information of data, and also can perform in reverse order or simultaneously.
Fig. 9 illustrates the flow chart simultaneously being received the process of data and control information by Node B according to the present invention second one exemplary embodiment.
With reference to Fig. 9, in step 901, Node-B receiver signal, in this signal, control information and data are multiplexed by predetermined frequency resource.In step 902, Node B is based on the number of the modulation format determination control channel code element of the dispatched data channel for UE.When the modulation format dispatched is QPSK, in step 903, Node B selects the number S of QPSK code element
qpskas the number S of control channel code element.On the contrary, when the modulation format dispatched is 16QAM, in step 904, Node B selects the number S of 16QAM code element
qamas the number S of control channel code element.
In step 905, Node B is based on control channel code element number S calculated data channel symbol number P.In step 906, the Signal separator received based on control channel code element and the multiplexed Received signal strength comprising M code element of data channel symbols number solution, thus is P data channel symbols and S control channel code element by Node B.In step 907, Node B demodulation the code element of each channel of decoding also then export pure data and control information.
Second embodiment can realize by using the transmission/reception equipment of the first embodiment shown in Fig. 6 and Fig. 7.
3rd embodiment
According to the third embodiment of the invention, by the code element number controlled for sending control information that sends control information according to the modulation scheme identical with the modulation scheme of data.In this embodiment, before modulation with bit levels instead of modulation after with symbol level, multiplexed data and control information.When performing multiplexed before modulation, UE or Node B do not need the modulation scheme according to data channel and select the modulation scheme of control channel individually.Therefore, transmission/reception process is according to a third embodiment of the present invention identical with the transmission/reception process of the second embodiment of the invention shown in 9 with Fig. 8.
Figure 10 is the block diagram of the transmitting apparatus of the UE illustrated according to the present invention the 3rd one exemplary embodiment.
With reference to Figure 10, when data and control information will be sent simultaneously, owing to being variable for the data resource of transfer of data, so notify to data rate controller 1001 resource quantity being used for control information transmission by control channel controller 1004.Be different from the second embodiment, due to multiplexed data and control information before modulation, the resource quantity therefore shared by each channel calculates with bit number.Data rate controller 1001 is from the bit number S of control channel controller 1004 receiving control information
b, and the bit number P that can be used for transfer of data can be calculated by transmitted bit based on whole
b.Data producer 1002 is according to the bit number P of the data channel calculated
b, produce P by carrying out coding to the pure data that will be sent out
bindividual data bit, and then the data bit of generation is supplied to multiplexer 1005.
The control information bit number S that control information generator 1003 calculates according to control channel controller 1004
b, produce S by carrying out coding to the pure control information that will be sent out
bindividual control information bit, and then the control information bit of generation is supplied to multiplexer 1005.The data symbols of the multiplexed generation of multiplexer 1005 and control code element.Modulated according to identical modulation scheme by modulator 1006 through multiplexed bit, processed by DFT precoder 1007 and IFFT unit 1008 and be then sent out.
Figure 11 is the block diagram of the receiving equipment of the Node B illustrated according to the present invention the 3rd one exemplary embodiment.
With reference to Figure 11, Node B obtains the signal of the particular UE comprising M code element by processing the signal received via FFT unit 1108 and IDFT unit 1107 during a TTI.Carry out these code elements of demodulation by demodulator 1106 according to the demodulation scheme corresponding with same modulation scheme, and then it is input to demultiplexer 1105 with the form of bit stream.
Scheduler 1101 is determined the MCS grade of data channel and is transmitted the MCS information of instruction MCS grade to control channel controller 1104.When there is the control information that will be sent out, the bit number S used in the control channel of UE determined by control channel controller 1104 based on the MCS grade indicated by MCS information
b, and by control channel bit number S
bbe delivered to scheduler 1101.Scheduler 1101 ascertains the number P
bas the bit number P used for transfer of data
b, this number P
bby extracting number S from whole bit numbers that can be transmitted by UE
bobtain, and by data channel bits number P
bbe sent to data demodulator 1102 and demultiplexer 1105.
Demultiplexer 1105 receives the number P of each channel from scheduler 1101 and control channel controller 1104
bwith number S
b, be separated from data flow each channel bit and then the bit of separation is delivered to data demodulator 1102 and control information demodulator 1103 respectively.Demodulator 1102 and 1103 demodulation bit of decoding input under the control of scheduler 1101 and control information controller 1104, thus obtain pure data and control information.
4th embodiment
UE arranges multiple control channel form according to the transformat (TF) of data at first, and then by selecting the control channel form corresponding with the TF of the data sent during each TTI to arrange control channel.As used herein, TF according to a fourth embodiment of the present invention refers to the transport block size (TransportBlockSizeTBS) corresponding with the data bulk that will be sent by UE, and its be by MCS grade and all can the quantity of frequency resource determine.In addition, for convenience of description, in the present embodiment, control channel form is defined by the number of control channel code element.Although do not describe especially here, such as MCS grade or physical layer bit number object parameter can be defined as control channel transformat according to revision for execution example of the present invention.
When using low TF, the allowed power grade for each modulated symbol is also low.Therefore, use a large amount of modulated symbols for the transmission of control information, to obtain the energy grade of the quality of reception of satisfying the demand.When using high MCS grade to send data, the channel condition that UE has had, and high power grade can be distributed for each modulated symbol.Therefore, even if use a small amount of modulated symbol for the transmission of control information, the energy grade of the quality of reception of satisfying the demand can also be obtained.
Following table 3 illustrates multiple examples of control channel formatting.
Table 3
In example 1, define the number of control channel code element for each TF.In example 2, the benchmark number S_ref of predefined control channel code element, for each TF, by for transfer of data necessary power grade PSD_k(wherein k represent TF index) and the power grade of the data when using reference symbol number between compare and calculate the necessary code element number S of control channel.When data power grade height in table 3, the power grade that can be used for control channel is also high.Therefore, can by using a small amount of code element to send control information.
Figure 12 illustrates the flow chart being sent the process of data and control information by UE according to the present invention the 4th one exemplary embodiment.
With reference to Figure 12, in step 1201, when having there is the control information and data that will send in identical TTI, in step 1202, UE identifies that the control channel form provided by TF index also selected in the TF index being used for data channel.In step 1203, UE produces by the time of reception or code rate controlling control information according to the code element number S of control channel form the control information comprising S code element.When code rate is fixed, UE performs the rate-matched of the control information for input in the rate-matched mode being similar to data, thus produces the control information comprising S control code element corresponding to the code element number S that will be actually being sent.
In step 1204, the code element number P of UE calculated data channel.The code element number P of data channel obtains (P=M-S) by deducting control channel code element number in the whole code element number M from the resource according to scheduling.In step 1205, produce the data comprising P code element.In detail, UE produces with modulation the data comprising P code element by performing rate-matched according to the data channel symbols number P corresponding to the physical layer quantity that can transmit.In step 1206, the data that multiplexed and transmission produces and control information.
Figure 13 illustrates the flow chart simultaneously being received the process of data and control information by Node B according to the present invention the 4th one exemplary embodiment.
With reference to Figure 13, in step 1301, Node-B receiver signal, in this signal, control information and data are multiplexed by predetermined frequency resource.UE sends CQI periodically, and only when receiving down link data, sends ACK/NACK information.Therefore, Node B knows the time interval of the signal containing data and control information for receiving package exactly.In step 1302, Node B selects control channel form.In detail, Node B is selected and is passed through to dispatch the corresponding control channel form of determined TF index.Node B notice UE is by the TF index of the determined data channel of schedule information, and UE sends data by utilizing the TF index identical with the TF index that Node B is dispatched.Therefore, the control channel form that uses of Node B and UE is always identical.
In step 1303, Node B utilizes the code element number of the control channel form selected to obtain the number P of data channel symbols.Then, in step 1304, Node B utilizes the code element number of control channel and data channel to separate the multiplexed signal received, thus is P data channel symbols and S control channel code element by the Signal separator received including M code element.In step 1305 and 1306, Node B demodulation the code element of each channel of decoding also then export pure data and control information.
Figure 14 is the block diagram of the transmitting apparatus of the UE illustrated according to the present invention the 4th one exemplary embodiment.
With reference to Figure 14, data rate controller 1401 by the channel (such as, scheduling channel) that is separated from Node-B receiver by the TF information of node B scheduling and then transmission and reception to TF information to control channel controller 1404.When there is the control information that will send, the code element number S of the control information corresponding with the TF index of the data channel indicated by TF information determined by control channel controller 1404, such as, according to above-mentioned table 3.Control information generator 1403 also then produces S the control code element comprising control information from the code element number S of control channel controller 1404 receiving control information.
If the code element number S of control channel controller 1404 transmitting control information is to data rate controller 1401, then data rate controller 1401 calculates based on the code element number S of control information the code element number P that can be used for transfer of data.Data producer 1402 by modulating the information bit of input, rate-matched, coding etc. produce the data comprising P the data symbols transmitted from data rate controller 1401.
By data symbols and the control code element of the multiplexed generation of multiplexer 1405, and DFT precoder 1406 produces by M the code element execution DFT exported multiplexer 1405 frequency-region signal comprising SC-FDMA code element.Then, frequency-region signal is mapped to the subcarrier of distribution by IFFT unit 1407, thus frequency-region signal is converted to the time-domain signal that will send.
Figure 15 is the block diagram of the receiving equipment of the Node B illustrated according to the present invention the 4th one exemplary embodiment.
With reference to Figure 15, Node B obtains the signal of the particular UE comprising M code element by processing the signal received via FFT unit 1507 and IDFT unit 1506 during a TTI.Then, the Signal separator of UE is become data and control signal by demultiplexer 1505.At this moment, the code element number shared by each channel notifies from scheduler 1501.The MCS grade of data channel determined by scheduler 1501 and the TF transmitted corresponding to the MCS grade determined indexes control channel controller 1504.When there is the control information that will send, the code element number S used in the control channel of UE determined by control channel controller 1504 according to the TF index being dispatched to UE, and transmits control channel code element number S to scheduler 1501.Scheduler 1501 ascertains the number P as the code element number used for transfer of data, this quantity P is by extracting number S to obtain from the code element number M corresponding with the whole resources being assigned to UE, and scheduler 1501 sends data channel symbols number P to data demodulator 1502 and code element number P and S then notifying demultiplexer 1505 relevant data channel and control channel.
From the code element number P of scheduler 1501 notification data demodulator 1502 for data channel, data demodulator 1502 is also decoded according to the demodulation scheme of the TF index of correspondence and code rate demodulation the code element of the data channel be separated by demultiplexer 1505.For this reason, scheduler 1501 provides the code element number of data channel and the information about concrete operations for data demodulator 1503.Control information demodulator 1503 control channel code element number S is notified from control channel controller 1504, and control information demodulator 1503 is also decoded according to the demodulation scheme of correspondence and code rate demodulation the code element of the control channel be separated by demultiplexer 1505, thus obtain the control information of such as ACK/NACK or CQI.
5th embodiment
The fifth embodiment of the present invention is similar to the fourth embodiment of the present invention, except control channel form is based on the necessary power grade of transfer of data instead of determine for each TF.In addition, according to the present embodiment, required power grade refer to UE absolute transmission power or relative to the service of considering of reference power level and each TF power excursion that reference power level is additionally arranged.Reference transmission power refers to power grade that controlled by Node B, that be the predetermined reception grade of maintenance.The power additionally arranged relative to reference power level have with by the identical implication of the implication of the necessary SNR of Node-B receiver corresponding data.
Usually, when the transfer of data of same services, the TF index of data channel is larger (that is, data rate is larger), and the necessary power grade of transfer of data is larger.The necessary power grade of transfer of data can mean the power grade of each modulated symbol in the symbol power of each subcarrier in frequency domain or time domain.For convenience of description, in the present embodiment, control channel form is defined by the code element number for control channel.Although wherein do not describe particularly, according to revision for execution example of the present invention, the parameter of such as MCS grade or physical layer bit number can be defined the transformat as control channel.
Following table 4 illustrates multiple examples of control channel formatting.
Table 4
In example 1, each PSD for the power grade of designation data channel defines control channel code element number.When the power grade of control channel is greater than or less than the power grade of data channel, UE use through-put power not yet in effect.Therefore, when data channel and control channel are sent simultaneously, it is preferred that both what be set to by the power grade of control channel with data channel is identical.In this case, in order to ensure the reliability of control channel, along with the power grade of data channel reduces, number and thus the repeatedly duplication control information code element of control channel code element can be increased.Otherwise, when the power grade height of data channel, the number of the control information code element of transmission can be reduced, so as to minimize may occur at the data division of the transmission of control information pierce through loss.Table 4 illustrates the method for arranging control channel form, when being set to data channel identical with the power grade of convenient control channel, calculating and is used for stablizing the necessary code element number of receiving control information.
In example 2, the benchmark number S_ref of predefined control channel code element, and by for each PSD for the necessary power grade PSD_k(of transfer of data wherein, k represents the PSD index of data channel) and the power grade of the data channel when using reference symbol number between compare and calculate the necessary code element number of control channel.As from table 4 notice, when the power grade height of data channel, the power grade that can be used for control channel is also high.Therefore, a small amount of code element can be utilized send control information.When the power grade of data channel is low, more code element can be sent.Therefore, the reliability of the low control channel required for PSD maintenance can be utilized.
UE is according to a fifth embodiment of the present invention identical with those of the fourth embodiment of the present invention with equipment with the process of Node B, and the PSD except data channel replaces TF information to take on the benchmark of the selection of the transformat for control channel.
Although reference wherein some one exemplary embodiment illustrate and describes the present invention, but what it should be appreciated by those skilled in the art that is, the multiple change in pro forma and details can be made wherein, and do not depart from the spirit and scope of the present invention limited by claims.
Claims (36)
1., for sending a method for data and control information in a wireless communication system, the method comprising the steps of:
Produce control information;
When the control information that will send occurs with information data in identical Transmission Time Interval TTI, consider the quantity of information data that will send and determine the quantity of the code element sent control information;
Multiplexed information data and control information; And
Send multiplexing information data and control information.
2. the method for claim 1, wherein this control information confirms ACK information.
3. the method for claim 1, wherein can by the quantity utilizing the quantity of the quantity of the information data that will send consideration scheduling resource to determine the code element sent control information.
4. the method for claim 1, wherein sends multiplexing information data and control information in the subcarrier resources for information data.
5. method as claimed in claim 4, wherein by using the surplus resources except control information to send information data.
6., the method for claim 1, wherein when only sending control information in TTI, the pre-configured resource for control information sends control information.
7. the method for claim 1, wherein before modulation by control information and information data multiplexing.
8. the method for claim 1, wherein based on time division multiplexing tdm method by control information and reference signal multiplexing.
9., the method for claim 1, wherein when sending control information with information data in identical TTI, utilize identical modulation scheme modulated information data and control information.
10., for sending a user equipment (UE) device for data and control information in a wireless communication system, this UE device comprises:
Control information generator, for generation of control information;
Control channel controller, for determining the quantity of the code element sent control information;
Multiplexer, for multiplexed information data and control information; And
Transmitting element, for sending multiplexing information data and control information,
Wherein, when the control information that will send occurs with information data in identical Transmission Time Interval TTI, consider the quantity of information data that will send and determine the quantity of the code element sent control information.
11. UE devices as claimed in claim 10, wherein this control information confirms ACK information.
12. UE devices as claimed in claim 10, wherein utilize the quantity of the information data that will send to consider that the quantity of scheduling resource determines the quantity of the code element sent control information.
13. UE devices as claimed in claim 10, wherein this transmitting element sends multiplexing information data and control information in the subcarrier resources for information data.
14. UE devices as claimed in claim 13, wherein by using the surplus resources except control information to send information data.
15. UE devices as claimed in claim 10, wherein, when only sending control information in TTI, the pre-configured resource for control information send control information.
16. UE devices as claimed in claim 10, wherein this multiplexer before modulation by control information and information data multiplexing.
17. UE devices as claimed in claim 10, wherein this multiplexer based on time division multiplexing tdm method by control information and reference signal multiplexing.
18. UE devices as claimed in claim 10, comprise modulator further, for when sending control information with information data in identical TTI, utilize identical modulation scheme modulated information data and control information.
19. 1 kinds for receiving the method for data and control information in a wireless communication system, the method comprising the steps of:
The uplink signal being included in control information and the information data occurred identical Transmission Time Interval TTI is received from subscriber equipment;
Determine the quantity of the code element of control information; And
Quantity according to the quantity of the code element of control information and the code element of information data carrys out demultiplexing uplink signal, so that obtaining information data and control information,
Wherein, consider the quantity of information data and determine the quantity of the code element of control information.
20. methods as claimed in claim 19, wherein this control information confirms ACK information.
21. methods as claimed in claim 19, wherein can by the quantity utilizing the quantity of the quantity of the information data sent consideration scheduling resource to determine the code element of control information.
22. methods as claimed in claim 19, wherein send uplink signal from subscriber equipment in the subcarrier resources for information data.
23. methods as claimed in claim 22, wherein by using the surplus resources except control information to come to send information data from subscriber equipment.
24. methods as claimed in claim 19, wherein, when only sending control information from subscriber equipment in TTI, the pre-configured resource for control information send control information.
25. methods as claimed in claim 19, are wherein demodulated into information data and control information by uplink signal after the demodulation.
26. methods as claimed in claim 19, wherein in a user device based on time division multiplexing tdm method by control information and reference signal multiplexing.
27. methods as claimed in claim 19, wherein, when sending control information with information data from subscriber equipment in identical TTI, utilize identical demodulation scheme demodulation uplink signal.
28. 1 kinds for receiving the Node-B device of data and control information in a wireless communication system, this Node-B device comprises:
Receiving element, for receiving the uplink signal being included in control information and the information data occurred in identical Transmission Time Interval TTI from subscriber equipment;
Controller, for determining the quantity of the code element of control information; And
Demodulation multiplexer, the quantity for the quantity of the code element according to control information and the code element of information data carrys out demultiplexing uplink signal, so that obtaining information data and control information,
Wherein, consider the quantity of information data and determine the quantity of the code element of control information.
29. Node-B device as claimed in claim 28, wherein this control information confirms ACK information.
30. Node-B device as claimed in claim 28, the quantity of scheduling resource is to determine the quantity of the code element of control information wherein to utilize the quantity of the information data of transmission to consider.
31. Node-B device as claimed in claim 28, wherein send uplink signal from subscriber equipment in the subcarrier resources for information data.
32. Node-B device as claimed in claim 31, wherein by using the surplus resources except control information to come to send information data from subscriber equipment.
33. Node-B device as claimed in claim 28, wherein, when only sending control information from subscriber equipment in TTI, the pre-configured resource for control information send control information.
34. Node-B device as claimed in claim 28, wherein uplink signal is demodulated into information data and control information by this demodulation multiplexer after the demodulation.
35. Node-B device as claimed in claim 28, wherein in a user device based on time division multiplexing tdm method by control information and reference signal multiplexing.
36. Node-B device as claimed in claim 28, comprise demodulator further, for when sending control information with information data from subscriber equipment in identical TTI, utilize identical demodulation scheme demodulation uplink signal.
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| KR10-2007-0059908 | 2007-06-19 | ||
| KR1020070059908A KR101002247B1 (en) | 2006-12-18 | 2007-06-19 | A method and an apparatus for transmitting/receiving data and control information on uplink in wireless telecommunication system |
| CN2007800425796A CN101536367B (en) | 2006-12-18 | 2007-12-18 | Method and apparatus for transmitting/receiving data and control information through an uplink in a wireless communication system |
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| KR101571566B1 (en) * | 2008-08-11 | 2015-11-25 | 엘지전자 주식회사 | Method of transmitting control signal in wireless communication system |
| KR20100019947A (en) | 2008-08-11 | 2010-02-19 | 엘지전자 주식회사 | Method of transmitting information in wireless communication system |
| KR101597573B1 (en) | 2008-08-11 | 2016-02-25 | 엘지전자 주식회사 | Method for uplink transmitting a control information |
| KR101646249B1 (en) | 2008-08-11 | 2016-08-16 | 엘지전자 주식회사 | Method and apparatus of transmitting information in wireless communication system |
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| US9544887B2 (en) | 2011-05-05 | 2017-01-10 | Lg Electronics Inc. | Method for receiving downlink signal, and user device, and method for transmitting downlink signal, and base station |
| CN103178928A (en) * | 2011-12-22 | 2013-06-26 | 联芯科技有限公司 | Method and system for sending pulse repetition rate (PRR) message |
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| CN104982083B (en) | 2014-02-13 | 2019-05-03 | 华为技术有限公司 | A kind of uplink signal control method and device |
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