CN105227265B - The method and transmitting terminal of signal are sent in a kind of machine type communication MTC system - Google Patents
The method and transmitting terminal of signal are sent in a kind of machine type communication MTC system Download PDFInfo
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- CN105227265B CN105227265B CN201410307425.7A CN201410307425A CN105227265B CN 105227265 B CN105227265 B CN 105227265B CN 201410307425 A CN201410307425 A CN 201410307425A CN 105227265 B CN105227265 B CN 105227265B
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Abstract
The invention discloses methods and transmitting terminal that signal is sent in a kind of MTC system, in this scenario, when transmitting terminal sends business datum signal each time, used modulating-coding parameter when this signal of transmission will be determined according to the feedback result whether being properly received of the receiving end to the preceding business datum signal once sent, special pilot signal or reference signal are sent without transmitting terminal, receiving end determines modulating-coding parameter independent of pilot signal or reference signal, but the determination to modulation coding parameter is completed while data transmission, therefore, improve the efficiency of transmission of channel, and improve the utilization rate of resource.Especially for this kind of system higher for delay-tolerant of MTC, its advantages are more obvious.
Description
Technical field
The present invention relates to field of communication technology, in particular to the method and transmitting terminal of signal are sent in a kind of MTC system.
Background technique
MTC (Machine-type Communication, machine type communication) is known as Internet of Things, refers to without artificial
Communication between the machine realized under the mode of participation and machine (or equipment and equipment), as shown in Figure 1, MTC system includes MTC
Server and multiple MTC terminals, multiple MTC terminal are serviced by network (including wireless access network and core net) and MTC
Device connection, realizes MTC communication.
The optimization of MTC system is current 3GPP (3rd Generation Partnership Project, third generation cooperation
Partnership Program) research on standard an important directions, especially include magnanimity MTC terminal real network in when, in addition to need
Consider the optimization of MTC, it is also necessary to consider MTC to shadow caused by HTH (Human to Human, interpersonal communication)
It rings.Therefore, the wide application prospect based on the following MTC guarantees that the performance of MTC is an important research direction.
Currently, being transmitted by the way of adaptive coding and modulating, main process is as follows in MTC system when sending signal:
Step a: receiving end measures the channel quality of the pilot channel of transmitting terminal to receiving end, and will believe pilot tone
The measurement result of the channel quality in road reports to transmitting terminal；
Step b: the measurement result selection that transmitting terminal is reported according to receiving end encodes and modulation system, and according to the volume of selection
Code and modulation system are sent to sent signal.
For example, UE (User Equipment, user terminal), i.e. MTC terminal measurement downlink are led when sending downlink signal
The channel quality of frequency channel, and by the measurement result of pilot channel, i.e. CQI (Channel Quality Indicator, channel
Quality instruction) feedback to base station, believe according to the adaptive adjustment downlink data of the measurement result of the pilot channel received by base station
Road (HS-PDSCH, High Speed Physical Downlink Shared Channel, high-speed downstream Physical Shared Channel)
Used coding and modulation system, and signal is sent using coding adjusted and modulation system.
By the above process as can be seen that when sending signal in MTC system at present, receiving end will be first to transmitting terminal to connecing
The channel quality of the pilot channel of receiving end measures, and the measurement result of the channel quality to pilot channel is reported to transmission
End, then, transmitting terminal just start transmission data, have the defects that efficiency of transmission is lower and waste of resource.Especially for MTC system
System is to the high space that the characteristics of tolerating, the prior art also advanced optimizes of delay.
Summary of the invention
The embodiment of the present invention provides the method and transmitting terminal that signal is sent in a kind of MTC system, to solve the prior art
Present in the problem of efficiency of transmission is lower, waste of resource.
Specific technical solution provided in an embodiment of the present invention is as follows:
In a first aspect, providing a kind of method for sending signal in MTC system, comprising:
First signal is sent to receiving end using the first modulating-coding parameter, wherein the receiving end is service node, institute
Stating the first signal is the first upstream data signals for carrying the first business datum of MTC terminal；
Receive the feedback information that the receiving end returns, wherein whether the feedback information is used to indicate the receiving end
The first signal received is correctly decoded；
According to the feedback information and the first modulating-coding parameter, the second modulating-coding parameter is redefined；
Second signal is sent using the second modulating-coding parameter, the second signal is for carrying MTC terminal
Second upstream data signals of the second business datum.
With reference to first aspect, in the first possible implementation, the first modulating-coding parameter and described second
Any of modulating-coding parameter include bandwidth, code rate, order of modulation, send power, in spreading factor at least one of.
With reference to first aspect or the first possible implementation of first aspect, second of possible realization side
It is described according to the feedback information and the first modulating-coding parameter in formula, the second modulating-coding parameter is redefined, specifically
Include:
When the feedback information indicates that the receiving end is correctly decoded first signal received, second is determined
The efficiency of transmission that modulating-coding parameter is characterized is more than or equal to the efficiency of transmission that the first modulating-coding parameter is characterized.
With reference to first aspect or the first to second possible implementation of first aspect, possible at the third
It is described according to the feedback information and the first modulating-coding parameter in implementation, redefine the second modulating-coding ginseng
Number, specifically includes:
When the feedback information indicates that undocked first signal received in the receiving end is correctly decoded, is determined
The efficiency of transmission that two modulating-coding parameters are characterized is less than the efficiency of transmission that the first modulating-coding parameter is characterized.
The third possible implementation with reference to first aspect, in the fourth possible implementation, when described anti-
When feedforward information indicates that undocked first signal received in the receiving end is correctly decoded, further includes:
First signal is retransmitted to the receiving end using the first modulating-coding parameter.
The 4th kind of possible implementation with reference to first aspect, in a fifth possible implementation, when described heavy
The number of biography is at least once the efficiency of transmission and the first modulating-coding parameter that the second modulating-coding parameter is characterized
The difference of the efficiency of transmission characterized is determined by the number.
Second with reference to first aspect is to the 5th kind of possible implementation, in a sixth possible implementation, institute
Stating the efficiency of transmission that the first modulating-coding parameter or the second modulating-coding parameter are characterized is transmission rate and transimission power
Ratio, or the ratio for transmission bandwidth and transimission power.
Second aspect provides a kind of transmitting terminal, comprising:
First transmission unit, for sending the first signal to receiving end using the first modulating-coding parameter, wherein described to connect
Receiving end is service node, and first signal is the first upstream data signals for carrying the first business datum of MTC terminal；
Receiving unit, the feedback information returned for receiving the receiving end, wherein the feedback information is used to indicate institute
State whether receiving end is correctly decoded the first signal received；
Determination unit, for redefining the second modulation according to the feedback information and the first modulating-coding parameter
Coding parameter；
Second transmission unit, for sending second signal using the second modulating-coding parameter, the second signal is
For carrying the second upstream data signals of the second business datum of MTC terminal.
In conjunction with second aspect, in the first possible implementation, states when the first transmission unit sends the first signal and adopt
The first modulating-coding parameter and second transmission unit send second modulation used when second signal and compile
Code any of parameter include bandwidth, code rate, order of modulation, send power, in spreading factor at least one of.
In conjunction with the possible implementation of the first of second aspect or second aspect, second of possible realization side
In formula, when the feedback information that the receiving unit receives indicates the receiving end to first signal received just
Really when decoding, the determination unit is specifically used for:
Determine that the efficiency of transmission that the second modulating-coding parameter is characterized is more than or equal to the first modulating-coding parameter
The efficiency of transmission characterized.
It is possible at the third in conjunction with the first to second possible implementation of second aspect or second aspect
In implementation, when the feedback information that the receiving unit receives indicates undocked described received in the receiving end
When one signal is correctly decoded, the determination unit is specifically used for:
Determine that the efficiency of transmission that the second modulating-coding parameter is characterized is less than what the first modulating-coding parameter was characterized
Efficiency of transmission.
It is connect in the fourth possible implementation when described in conjunction with the third possible implementation of second aspect
When the feedback information that receipts unit receives indicates that undocked first signal received in the receiving end is correctly decoded, institute
The first transmission unit is stated to be also used to:
First signal is retransmitted to the receiving end using the first modulating-coding parameter.
In conjunction with the 4th kind of possible implementation of second aspect, in a fifth possible implementation, the re-transmission
Number be that at least once, second transmission unit sends the second modulating-coding parameter institute table used when second signal
The efficiency of transmission of sign, the first modulating-coding parameter used when sending the first signal with first transmission unit are characterized
The difference of efficiency of transmission determined by the number.
In conjunction with second to the 5th kind of possible implementation of second aspect, in a sixth possible implementation, institute
It states the first transmission unit and sends the first modulating-coding parameter used when the first signal or second transmission unit transmission
The efficiency of transmission that the second modulating-coding parameter used when second signal is characterized is the ratio of transmission rate and transimission power
Value, or be the ratio of transmission bandwidth and transimission power.
It, all can be according to receiving end to preceding primary when transmitting terminal sends business datum signal each time in the embodiment of the present invention
The feedback result of the business datum signal of transmission whether being properly received determines used modulating-coding when this signal of transmission
Parameter sends special pilot signal or reference signal without transmitting terminal, and receiving end is independent of pilot signal or reference signal
It determines modulating-coding parameter, but completes the determination to modulation coding parameter while data transmission, this improves letters
The efficiency of transmission in road, and improve the utilization rate of resource.Especially for this kind of system higher for delay-tolerant of MTC,
Beneficial effect is more obvious.
Detailed description of the invention
Fig. 1 is the schematic diagram of MTC system in the prior art；
Fig. 2 is the detail flowchart for sending signal during the present invention is implemented in MTC system；
Fig. 3 is the embodiment for sending signal during the present invention is implemented in MTC system；
Fig. 4 is the illustrative view of functional configuration of transmitting terminal during the present invention is implemented；
Fig. 5 is the entity structure schematic diagram of transmitting terminal during the present invention is implemented；
Fig. 6 is MTC system schematic diagram during the present invention is implemented.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In addition, the terms " system " and " network " are often used interchangeably herein.The terms " and/
Or ", only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships, for example, A and/or B, it can be with table
Show: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, letter "/" herein, typicallys represent front and back
Affiliated partner is a kind of relationship of "or".
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawings of the specification, it should be understood that this place
The preferred embodiment of description only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention, and the case where not conflicting
Under, the features in the embodiments and the embodiments of the present application can be combined with each other.
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing.
As shown in fig.2, the detailed process for sending signal is as follows in the embodiment of the present invention:
Step 200: the first signal is sent to receiving end using the first modulating-coding parameter, wherein receiving end is service section
Point, the first signal are the first upstream data signals for carrying the first business datum of MTC terminal；
Step 210: receiving the feedback information that receiving end returns, wherein feedback information is used to indicate whether receiving end docks
The first signal received is correctly decoded, i.e. feedback (ACK or NACK)；
Step 220: according to feedback information and the first modulating-coding parameter, redefining the second modulating-coding parameter；
Step 230: second signal being sent using the second modulating-coding parameter, second signal is for carrying MTC terminal
Second upstream data signals of the second business datum.
In the embodiment of the present invention, there are many information that the first modulating-coding parameter includes, and may include believing as follows optionally
Any one in breath or any combination:
Bandwidth, order of modulation, sends power, spreading factor at code rate.
Similarly, there are many information that the second modulating-coding parameter includes, and may include any in following information optionally
One or any combination:
Bandwidth, order of modulation, sends power, spreading factor at code rate.
Certainly, the embodiment of above-mentioned only the first modulating-coding parameter and the second modulating-coding parameter, the first modulating-coding
Parameter and the second modulating-coding parameter may be other information, are no longer described in detail one by one herein.
In the embodiment of the present invention, when feedback information instruction receiving end is correctly decoded the first signal received, at this point,
It, optionally, can be in the following way in the implementation for redefining the second modulating-coding parameter:
Determine that the efficiency of transmission that the second modulating-coding parameter is characterized is equal to the transmission that the first modulating-coding parameter is characterized
Efficiency.
Further, in order to improve efficiency of transmission, in the embodiment of the present invention, when feedback information instruction receiving end is to receiving
The first signal when being correctly decoded, at this point, redefining in the implementation of the second modulating-coding parameter, optionally, can adopt
With such as under type:
Determine that the efficiency of transmission that the second modulating-coding parameter is characterized is greater than the transmission that the first modulating-coding parameter is characterized
Efficiency.
For example, modulation system in the first modulating-coding parameter be BPSK (Binary Phase Shift Keying, two
System phase shift keying), encoder bit rate is CC (Convolutional Coding, convolutional encoding) 1/3, transmission bandwidth 1, spread spectrum
The factor is 8, and sending power is 1, and feedback information instruction receiving end is when being correctly decoded the first signal received, the second modulation
Information in coding parameter can be with are as follows: modulation system BPSK, encoder bit rate CC1/3, transmission bandwidth 1, spreading factor are
2, sending power is 1, wherein the transmission rate that the second modulating-coding parameter is characterized is greater than the first modulating-coding parameter and is characterized
Transmission rate.
In the embodiment of the present invention, when feedback information instruction undocked the first signal received in receiving end is correctly decoded, this
When, it, optionally, can be in the following way when redefining the second modulating-coding parameter:
Determine efficiency of transmission that the second modulating-coding parameter is characterized less than the transmission that the first modulating-coding parameter is characterized
Efficiency.
For example, modulation system in the first modulating-coding parameter be QPSK (Quadri Phase Shift Keying, four
Phase-shift keying (PSK)), encoder bit rate CC2/3, transmission bandwidth 1, spreading factor 1, sending power is 4, and feedback information indicates
When receiving end is correctly decoded the first signal received, information in the second modulating-coding parameter can be with are as follows: modulation system is
BPSK, encoder bit rate CC1/3, transmission bandwidth 1, spreading factor 2, sending power is 1, wherein the second modulating-coding ginseng
Several characterized transmission rates are less than the transmission rate that the first modulating-coding parameter is characterized.
In the embodiment of the present invention, when feedback information instruction undocked the first signal received in receiving end is correctly decoded,
It further includes operating as follows that the method for signal is sent in MTC system:
First signal is retransmitted to receiving end using the first modulating-coding parameter.
Wherein, it when retransmitting the first signal to receiving end using the first modulating-coding parameter, optionally, can use as follows
Mode:
First signal is directly retransmitted to receiving end using the first modulating-coding parameter；Or
Use the first modulating-coding parameter to receiving end with new RV (Redundancy Version, redundancy versions) parameter
Send the first signal.
When due to changing the RV parameter retransmitted, when punching/repeat patterns in rate matching procedure and just biography, is different, can
To reduce the encoder bit rate of the first signal, after the encoder bit rate of the first signal reduces, receiving end be can be improved to the first signal
The accuracy rate being correctly decoded.
Use the first modulating-coding parameter to receiving end the first signal of re-transmission for the technology of comparative maturity in the prior art,
This is no longer described in detail one by one.
In the embodiment of the present invention, modulating-coding parameter can (Modulation and coding scheme be adjusted with MCS
Coding mode processed) number is corresponding, and the difference between every two adjacent MCS number is a step-length, as shown in table 1:
The corresponding relationship of table 1 modulating-coding parameter and MCSE
Wherein, if the corresponding MCS difference 1 of modulating-coding parameter, a step is differed between corresponding modulating-coding parameter
It is long, e.g., differ a step-length between the first modulating-coding parameter and the second modulating-coding parameter, the first modulating-coding parameter and the
Two step-lengths are differed between three modulating-coding parameters.Therefore in the table, an a kind of efficiency of transmission of modulating-coding parameter characterization,
An efficiency of transmission grade is corresponded to, includes multiple efficiency of transmission grades in table, the corresponding modulation of close efficiency of transmission grade
Difference between coding parameter is a step-length.
In the embodiment of the present invention, when retransmitting the first signal to receiving end using the first modulating-coding parameter, the number of re-transmission
For the efficiency of transmission that at least once, the second modulating-coding parameter is characterized and the efficiency of transmission that the first modulating-coding parameter is characterized
Difference determined by number.
When determining the modulating-coding parameter that transmission uses, number of retransmissions when can transmit data-signal based on last time is true
It is fixed.The number of re-transmission is bigger, and the modulating-coding parameter that this transmission uses is with respect to the modulating-coding parameter that last time transmission uses
Difference is also bigger, that is, the step-length differed is bigger.
In the embodiment of the present invention, if not sending third signal to receiving end before sending the first signal to receiving end, the
The receiving end detected according to one modulating-coding parameter to transmitting terminal pilot channel channel quality determine；
If the forward direction receiving end for sending the first signal to receiving end sends third signal, the first modulating-coding parameter is root
It is determined according to the feedback information for third signal that receiving end returns.
In the embodiment of the present invention, the channel quality of pilot channel can use receiving intensity or the pilot tone letter of pilot channel
The path loss or pilot channel of road experience are characterized in the fading factor of different frequency bands, it is of course also possible to be joined with other
Number is characterized, and is no longer described in detail one by one herein.
Certainly, the first modulating-coding parameter can also be determined according to other way, be no longer described in detail one by one herein.
In the embodiment of the present invention, optionally, the transmission effect that the first modulating-coding parameter, the second modulating-coding parameter are characterized
Rate is the ratio of transmission rate and transimission power, or the ratio for transmission bandwidth and transimission power.
In the embodiment of the present invention, in order to improve decoding efficiency of the receiving end to the signal received, before sending signal, or
Person can notify receiving end used modulation when sending signal to compile while sending signal, or after sending signal
Code parameter.
For example, being sent when sending the first signal using the first modulating-coding parameter, then the first modulating-coding parameter is sent out
It send to receiving end, so that receiving end is decoded the first signal using the first modulating-coding parameter；When sending second signal,
It is sent using the second modulating-coding parameter, then the second modulating-coding parameter is sent to receiving end, so that receiving end utilizes the
Two modulating-coding parameters are decoded second signal.
Certainly, in order to reduce the expense of transmitting terminal, in the embodiment of the present invention, transmitting terminal can not also notify receiving end to send
End when sending signal used modulating-coding parameter, receiving end progress blind Detecting, in this way, transmitting terminal can reduce it is logical
Know resource used in the modulating-coding parameter of receiving end, thereby reduces expense.
For example, if UE when sending signal, be only possible to choose BPSK, QPSK, 8PSK (Phase Shift Keying,
Phase-shift keying (PSK))), 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation), 64QAM this modulate in 5
One of mode, then base station can estimate that UE is sent used in signal by sequence or at random or with certain algorithm
Modulation system, then, base station carry out demodulation coding to the signal received according to the modulation system estimated and e.g. successively assume
Demodulation coding is carried out using 5 kinds of modulation systems, is demodulated when data check is correct correct.
Concrete application scene is given below in embodiment for a better understanding of the present invention, for the process for sending signal, makees
It is described in further detail out, as shown in Figure 3:
Step 300:UE sends the first signal to base station using third modulating-coding parameter；
Wherein, third modulating-coding parameter is true according to the channel quality of base station to the downlink pilot frequency channel to signal under UE
Fixed, third modulating-coding parameter is as shown in table 1.
Step 310: base station carries out demodulation coding to the first signal, generates feedback information and feeds back to UE；
Step 320:UE judges whether feedback information instruction base station is correctly decoded the first signal received, if so, holding
Otherwise row step 330 executes step 340；
Step 330: second signal is sent using the 4th modulating-coding parameter；
Step 340: the first signal being retransmitted using the first modulating-coding parameter, until base station is correctly decoded the first signal.
In the embodiment, two step-lengths, third tune are differed between the first modulating-coding parameter and third modulating-coding parameter
A step-length is differed between coding parameter processed and the 4th modulating-coding parameter.
Based on the above-mentioned technical proposal, as shown in fig.4, the embodiment of the present invention provides a kind of transmitting terminal, which includes
First transmission unit 40, receiving unit 41, determination unit 42 and the second transmission unit 43, in which:
First transmission unit 40, for sending the first signal to receiving end using the first modulating-coding parameter, wherein receive
End is service node, and the first signal is the first upstream data signals for carrying the first business datum of MTC terminal；
Receiving unit 41, for receiving the feedback information of receiving end return, wherein feedback information, which is used to indicate receiving end, is
It is no that the first signal received is correctly decoded；
Determination unit 42, for redefining the second modulating-coding ginseng according to feedback information and the first modulating-coding parameter
Number；
Second transmission unit 43, for sending second signal using the second modulating-coding parameter, second signal is for taking
Second upstream data signals of the second business datum with MTC terminal.
In the embodiment of the present invention, optionally, the first transmission unit 40 sends the first modulating-coding used when the first signal
Parameter and the second transmission unit 43 send any of the second modulating-coding parameter used when second signal include bandwidth,
Code rate, order of modulation, send power, in spreading factor at least one of.
In the embodiment of the present invention, optionally, the feedback information instruction receiving end received when receiving unit 41 is to receiving
The first signal when being correctly decoded, determination unit 42 is specifically used for:
Determine that the efficiency of transmission that the second modulating-coding parameter is characterized is more than or equal to the first modulating-coding parameter institute table
The efficiency of transmission of sign.
In the embodiment of the present invention, optionally, when the feedback information that receiving unit 41 receives indicates the undocked receipts in receiving end
To the first signal be correctly decoded when, determination unit 42 is specifically used for:
Determine efficiency of transmission that the second modulating-coding parameter is characterized less than the transmission that the first modulating-coding parameter is characterized
Efficiency.
In the embodiment of the present invention, further, when the feedback information instruction receiving end that receiving unit 41 receives is undocked
When the first signal received is correctly decoded, the first transmission unit 40 is also used to:
First signal is retransmitted to receiving end using the first modulating-coding parameter.
In the embodiment of the present invention, optionally, the number of re-transmission is that at least once, the second transmission unit 43 sends second signal
The efficiency of transmission that the second modulating-coding parameter of Shi Caiyong is characterized uses when sending the first signal with the first transmission unit 40
The difference for the efficiency of transmission that first modulating-coding parameter is characterized is determined by number.
In the embodiment of the present invention, optionally, the first transmission unit 40 sends the first modulating-coding used when the first signal
Parameter or the second transmission unit 43 send the efficiency of transmission that the second modulating-coding parameter used when second signal is characterized, and are
The ratio of transmission rate and transimission power, or the ratio for transmission bandwidth and transimission power.
As shown in figure 5, being the entity apparatus figure of transmitting terminal provided in an embodiment of the present invention, transmitting terminal includes at least one
Manage device 501, communication bus 502, memory 503 and at least one communication interface 504.
Wherein, communication bus 502 is for realizing connecting and communicating between said modules, communication interface 504 be used for it is outer
Portion's equipment connects and communicates.
Wherein, for memory 503 for storing the program code needed to be implemented, processor 501 can pass through communication bus 502
The program code stored in memory 503 is called, when processor 501 calls the program code stored in memory 503, will be held
The following operation of row:
First signal is sent to receiving end using the first modulating-coding parameter, wherein receiving end is service node, the first letter
Number for the first upstream data signals for carrying the first business datum of MTC terminal；
Receive the feedback information that receiving end returns, wherein whether feedback information is used to indicate receiving end to the received
One signal is correctly decoded；
According to feedback information and the first modulating-coding parameter, the second modulating-coding parameter is redefined；
Second signal is sent using the second modulating-coding parameter, second signal is the second business for carrying MTC terminal
Second upstream data signals of data.
As shown in fig. 6, the embodiment of the present invention also provides a kind of MTC system, the MTC system include receiving end and such as Fig. 4 or
Transmitting terminal shown in fig. 5.
It, all can be according to receiving end to preceding primary when transmitting terminal sends business datum signal each time in the embodiment of the present invention
The feedback result of the business datum signal of transmission whether being properly received determines used modulating-coding when this signal of transmission
Parameter sends special pilot signal or reference signal without transmitting terminal, and receiving end is independent of pilot signal or reference signal
It determines modulating-coding parameter, but completes the determination to modulation coding parameter while data transmission, this improves letters
The efficiency of transmission in road, and improve the utilization rate of resource.Especially for this kind of system higher for delay-tolerant of MTC,
Beneficial effect is more obvious.Since MTC system is higher to delay-tolerant, even from the preceding business datum signal once sent
Whether it is properly received to be modulated the determination of coding parameter, reaching for beneficial effect will not be influenced.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device of present one or more flows of the flowchart and/or the function in one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
Function in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. sending the method for signal in a kind of machine type communication MTC system characterized by comprising
First signal is sent to receiving end using the first modulating-coding parameter, wherein the receiving end is service node, described the
One signal is the first upstream data signals for carrying the first business datum of MTC terminal；
Receive the feedback information that the receiving end returns, wherein the feedback information is used to indicate whether the receiving end docks
The first signal received is correctly decoded；
According to the feedback information and the first modulating-coding parameter, the second modulating-coding parameter is redefined；
It is described according to the feedback information and the first modulating-coding parameter, redefine the second modulating-coding parameter, specifically
Include:
When the feedback information indicates that the receiving end is correctly decoded first signal received, the second modulation is determined
The efficiency of transmission that coding parameter is characterized is more than or equal to the efficiency of transmission that the first modulating-coding parameter is characterized；
Second signal is sent using the second modulating-coding parameter, the second signal is second for carrying MTC terminal
Second upstream data signals of business datum；
Wherein, any of the first modulating-coding parameter and the second modulating-coding parameter include code rate and modulation order
Number, any of the first modulating-coding parameter and the second modulating-coding parameter remove including code rate and order of modulation it
Further include outside bandwidth, send power, in spreading factor at least one of.
2. the method as described in claim 1, which is characterized in that described according to the feedback information and first modulating-coding
Parameter redefines the second modulating-coding parameter, specifically includes:
When the feedback information indicates that undocked first signal received in the receiving end is correctly decoded, the second tune is determined
The efficiency of transmission that coding parameter processed is characterized is less than the efficiency of transmission that the first modulating-coding parameter is characterized.
3. method according to claim 2, which is characterized in that received when the feedback information indicates that the receiving end is undocked
First signal when being correctly decoded, further includes:
First signal is retransmitted to the receiving end using the first modulating-coding parameter.
4. method as claimed in claim 3, which is characterized in that the number of the re-transmission is second modulation at least once
The difference for the efficiency of transmission that the efficiency of transmission and the first modulating-coding parameter that coding parameter is characterized are characterized is by described time
Number determines.
5. method according to any of claims 1-4, which is characterized in that the first modulating-coding parameter or described second
The efficiency of transmission that modulating-coding parameter is characterized is the ratio of transmission rate and transimission power, or is transmission bandwidth and transmission function
The ratio of rate.
6. a kind of transmitting terminal characterized by comprising
First transmission unit, for sending the first signal to receiving end using the first modulating-coding parameter, wherein the receiving end
For service node, first signal is the first upstream data signals for carrying the first business datum of MTC terminal；
Receiving unit, the feedback information returned for receiving the receiving end, wherein the feedback information is used to indicate described connect
Whether receiving end is correctly decoded the first signal received；
Determination unit, for redefining the second modulating-coding according to the feedback information and the first modulating-coding parameter
Parameter；
When the feedback information that the receiving unit receives indicates the receiving end to first signal received just
Really when decoding, the determination unit is specifically used for:
Determine that the efficiency of transmission that the second modulating-coding parameter is characterized is more than or equal to the first modulating-coding parameter institute table
The efficiency of transmission of sign；
Second transmission unit, for using the second modulating-coding parameter send second signal, the second signal be for
Carry the second upstream data signals of the second business datum of MTC terminal；
Wherein, first transmission unit sends the first modulating-coding parameter and described second used when the first signal
Any of the second modulating-coding parameter for using includes code rate and order of modulation when transmission unit sends second signal,
Any of the first modulating-coding parameter and the second modulating-coding parameter are in addition to including code rate and order of modulation
Further include bandwidth, send power, in spreading factor at least one of.
7. transmitting terminal as claimed in claim 6, which is characterized in that when the feedback information that the receiving unit receives refers to
When showing that undocked first signal received in the receiving end is correctly decoded, the determination unit is specifically used for:
Determine that the efficiency of transmission that the second modulating-coding parameter is characterized is less than the transmission that the first modulating-coding parameter is characterized
Efficiency.
8. transmitting terminal as claimed in claim 7, which is characterized in that when the feedback information that the receiving unit receives refers to
When showing that undocked first signal received in the receiving end is correctly decoded, first transmission unit is also used to:
First signal is retransmitted to the receiving end using the first modulating-coding parameter.
9. transmitting terminal as claimed in claim 8, which is characterized in that the number of the re-transmission is second hair at least once
The efficiency of transmission that the second modulating-coding parameter for sending unit to use when sending second signal is characterized is sent with described first
Unit sends the difference for the efficiency of transmission that the first modulating-coding parameter used when the first signal is characterized by the number
It determines.
10. transmitting terminal as claim in any one of claims 6-9, which is characterized in that first transmission unit sends the first letter
Number when the first modulating-coding parameter for using or second transmission unit send described second used when second signal
The efficiency of transmission that modulating-coding parameter is characterized is the ratio of transmission rate and transimission power, or is transmission bandwidth and transmission
The ratio of power.
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| CN201410307425.7A CN105227265B (en) | 2014-06-30 | 2014-06-30 | The method and transmitting terminal of signal are sent in a kind of machine type communication MTC system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106301724B (en) | 2015-05-30 | 2019-05-07 | 北京智谷睿拓技术服务有限公司 | The method and apparatus for transmitting data |
| TWI780133B (en) * | 2017-03-23 | 2022-10-11 | 財團法人資訊工業策進會 | User equipment and base station |
| CN108696335B (en) * | 2017-04-10 | 2021-10-15 | 华为技术有限公司 | Transmission method, sending end and receiving end |
| CN112425226B (en) * | 2018-07-16 | 2024-02-20 | 株式会社Ntt都科摩 | Communication method and corresponding user terminal and base station |
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| CN102065534A (en) * | 2011-01-31 | 2011-05-18 | 华为技术有限公司 | Power adjustment method and device |
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| CN1845486A (en) * | 2005-04-08 | 2006-10-11 | 财团法人工业技术研究院 | Speed adjusting method via cross-level-analysis for WLAN |
| CN102065534A (en) * | 2011-01-31 | 2011-05-18 | 华为技术有限公司 | Power adjustment method and device |
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