CN103580822B - A kind of data transmission method and system - Google Patents
A kind of data transmission method and system Download PDFInfo
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- CN103580822B CN103580822B CN201210261426.3A CN201210261426A CN103580822B CN 103580822 B CN103580822 B CN 103580822B CN 201210261426 A CN201210261426 A CN 201210261426A CN 103580822 B CN103580822 B CN 103580822B
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Abstract
The invention discloses a kind of data transmission method, including：According to the data of transmission, determine to be used for transmission the resource block quantity of the data and at least one hybrid automatic repeat-request (HARQ) version of generation in each TTI in Transmission Time Interval binding (TTI Bundling)；The resource block quantity of the data is used for transmission in each TTI in the determining TTI Bundling, the HARQ versions of the generation are transmitted by TTI Bundling.The present invention also accordingly discloses a kind of data transmission system.By scheme of the present invention, when carrying out data transmission, the resource block number in each TTI in TTI Bundling can be unequal, so as to flexibly select transport block size (TBS), improves resource utilization.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of data transmission method and systems.
Background technology
With the fast development of wireless communication technique, limited frequency spectrum resource is increasingly becoming the master for restricting Development of Wireless Communications
Factor is wanted, but exactly limited frequency spectrum resource excites the appearance of new technology.Capacity and covering are two in a wireless communication system
A important performance indicator, in order to increase capacity, mostly using identical frequency process networking, but identical frequency process networking increases minizone again
Interference declines so as to cause covering performance.
In long term evolution (Long Term Evolution, LTE) system, downlink employs orthogonal frequency division multiplexing multiple access
(Orthogonal Frequency Division Multiplexing Access, the OFDMA) technology of access, can significantly drop
Interference in low cell, but due to use identical frequency process networking, inter-cell interference (Inter-Cell Interference,
ICI) increase apparent.In order to reduce ICI, LTE also has standardized many technologies, for example, downlink inter-cell interference cancellation (Inter-
Cell Interfernce Cancellation, ICIC).Downlink ICIC technologies are based on eNodeB Relative Narrowband TX Power
The method of (Relative Narrowband TX Power, RNTP) limitation realizes that downlink interferes advance prompting function, enhances
The covering performance of physical down Traffic Channel (Physical Downlink Shared Channel, PDSCH).Uplink employs
He Single Carrier-Frequency Division multiple access accesses (Single Carrier-Frequency Division Multiplexing Access, SC-
FDMA) technology can significantly reduce the peak-to-average force ratio of UE, improve signal quality, but due to using identical frequency process networking as much, small
Section interference ICI increases apparent.In order to reduce ICI, LTE uplinks also have standardized many technologies, for example, uplink is based on HII/OI
ICIC technologies, enhance physical uplink Traffic Channel (Physical Uplink Shared Channel, PUSCH).
In addition, multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) technology passes through space point
Collection, spatial reuse and beam forming technique can also improve the covering performance and volumetric properties of LTE system, be particularly based on MIMO technology
Cooperative multi-point (Coordinated Multiple Point, the CoMP) technology to grow up.But due in current network, terminal
(User Equipment, UE) is that single antenna is sent, so, MIMO technology and CoMP technologies are limited for the improvement of uplink,
(Joint Receiver, JR), which can only be received, by the joint of receiving terminal is improved.
In addition, channel coding (Channel Coding) technology has significant contribution on link transmission performance is improved, make
The various declines of channel can be resisted by obtaining data.
Although there are the transmission performance that numerous technologies can improve system, especially network covering property in LTE system,
It is confirmed by network test and software emulation, PDSCH and VoIP business when PUSCH during moderate rate, high-speed is still
It is the channel that covering performance is limited in each channel in LTE system.Itself main reason is that：The transmission power of UE is limited to be caused
Etc. the PUSCH and VoIP of rates be limited, and the ICI between base station causes the PDSCH of high-speed to be limited.This covering to LTE system
Performance boost proposes demand, for this purpose, LTE system introduce Transmission Time Interval (Transmission Time Interval,
TTI (Bundling) technology) is bundled.TTI Bundling technologies form different redundancies by channel coding to entire data packet
Version, different redundancy versions transmit in continuous TTI respectively, and TTI Bundling technologies are by occupying more transmission moneys
Source obtains coding gain and diversity gain, to obtain higher reception energy and link signal-to-noise ratio, so as to improve LTE system
Covering power.
Fig. 1 is that a kind of TTI Bundling of VoIP business in the relevant technologies transmit schematic diagram, as shown in Figure 1,4 continuous
TTI be referred to as TTI Bundling sizes (TTI Bundling Size) be 4 TTIBundling, UE is in the TTI of PUSCH
It carries out TTI Bundling head on t to t+3 to pass, eNodeB is received after TTI Bundling head are passed in the downlink physical of TTI t+7
Hybrid automatic repeat-request (Hybrid Automatic Repeat Request, HARQ) instruction channel (Physical HARQ
Indication Channel, PHICH) on indicate HARQ response messages, if response be NACK (Non-Acknowledge),
Then UE will carry out the 2nd transmission (the i.e. first time of TTIBundling of TTI Bundling on the TTI t+16 to 19 of PUSCH
Retransmit), eNodeB indicates HARQ responses letter after receiving the first time re-transmission of TTI Bundling on the PHICH of TTI t+24
Breath；And so on, until response for ACK (Acknowledge) or has reached the maximum trial the number of transmissions (such as 3 allowed
It is secondary), transmission ending.The control information (such as resource location) of TTI Bundling passes through first TTI in TTI Bundling
Corresponding PDCCH instructions.
It should be noted that using TTI Bundling transmission data (Data) business and the transmission original for transmitting VoIP business
Manage it is identical, difference lies in, using TTI Bundling transmit VoIP business when, data send have periodically, using TTI
During Bundling transmitting data services, data are sent without periodically.
Under scene shown in FIG. 1, the resource block number in each TTI in TTI Bundling is equal, although money
The equal control process that can simplify TTI Bundling of source block number, and the control overhead of TTI Bundling is reduced, but TTI
The resource block number in each TTI in Bundling equal must can lead to problems with：Each TTI Bundling transmission
Resource block number be each TTI resource block number * TTIBundling sizes, cause to transmit in TTI Bundling
The value of transport block size (Transmission Block Size, TBS) be restricted, this is for VoIP service impacts
Small, because the TBS of VoIP business has carried out targeted design under full rate, such as TBS=328 corresponding A MR encoders are expired
Rate has setting, but for data service in RB numbers from 1~9, can be from 1kb/s since its speed range is more wide in range
1Mb/s is reached, the type of the TBS needed is more, so, when TTI Bundling are applied to data transmission, the spirit of TBS selections
Activity is poor, may result in resource utilization reduction.
Invention content
In view of this, it is a primary object of the present invention to provide a kind of data transmission method and system, low control is being kept
TBS can be flexibly selected on the basis of expense, improves resource utilization.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of data transmission method, including：
According to the data of transmission, determine to be used for transmission in each TTI in Transmission Time Interval binding TTI Bundling
The resource block quantity of the data and at least one hybrid automatic repeat-request HARQ versions of generation；
The resource block quantity of the data is used for transmission in each TTI in the determining TTI Bundling,
The HARQ versions of the generation are transmitted by TTI Bundling.
K resource block in N number of TTI need to be occupied comprising N number of TTI, the data of transmission in TTI Bundling, the K is not
It is configured more than system bandwidth,
The data according to transmission determine to be used for transmission the money of the data in each TTI in TTI Bundling
Source block quantity is：
In N number of TTI in TTI Bundling ,+1 resource block of each TTI distribution floor (K/N) in R TTI is used
In transmitting the data, in addition each TTI distribution floor (K/N) a resource blocks in N-R TTI are used for transmission the data,
Wherein, R=K mod N.
The N is determined according to default configuration or is authorized according to the rrc layer management message from base station or physical layer resources
Signaling determines,
The K authorizes signaling according to the physical layer resources from base station and determines,
The position of the R TTI determines according to default configuration or according to rrc layer management message or object from base station
Reason layer resource is authorized signaling and is determined.
It is described to be according at least one HARQ versions of the data of transmission generation：
The length of each HARQ versions is floor (M*Nsc/N) or M*Nsc,
Wherein, M is modulation levels, and Nsc is the sum of data subcarrier in K resource block, and N is TTI in TTIBundling
Number.
The HARQ versions include physical layer CRC check.
When the length of each HARQ versions is M*Nsc, each HARQ versions are carried out respectively by K resource block in N number of TTI
Transmission；
When the length of each HARQ versions is floor (M*Nsc/N), each HARQ versions are respectively by 1 or 2 TTI
+ 1 resource block of floor (K/N) be transmitted.
A kind of data transmission system, including：Determining module, generation module and transmission module；Wherein,
The determining module for the data according to transmission, determines to be used for transmission in each TTI in TTI Bundling
The resource block quantity of the data；
The generation module for the data according to transmission, generates at least one hybrid automatic repeat-request HARQ versions；
The transmission module, for being used in each TTI in the TTI Bundling that are determined according to the determining module
The resource block quantity of the data is transmitted, the HARQ versions of the generation module generation are transmitted by TTI Bundling.
K resource block in N number of TTI need to be occupied comprising N number of TTI, the data of transmission in TTI Bundling, the K is not
It is configured more than system bandwidth,
The determining module, specifically for determining in N number of TTI in TTI Bundling, each TTI points in R TTI
The data are used for transmission with+1 resource block of floor (K/N), in addition each TTI distribution floor (K/N) in N-R TTI
A resource block is used for transmission the data, wherein, R=K mod N.
The determining module is additionally operable to determine the position of the R TTI or according to from base station according to default configuration
Rrc layer management message or physical layer resources authorize the position that signaling determines the R TTI.
The generation module, the HARQ for being floor (M*Nsc/N) or M*Nsc specifically for generation HARQ Version lengths
Version, wherein, M is modulation levels, and Nsc is the sum for removing the usable data subcarriers after pilot tone in K resource block, N TTI
The number of TTI in Bundling.
The HARQ versions include physical layer CRC check.
The transmission module, specifically for the length in each HARQ versions be M*Nsc when, respectively by N number of TTI
K resource block transmits each HARQ versions；When the length of each HARQ versions is floor (M*Nsc/N), pass through 1 or 2 respectively
+ 1 resource block of floor (K/N) in a TTI transmits each HARQ versions.
A kind of data transmission method of the present invention and system, according to the data of transmission, determine each in TTI Bundling
The resource block quantity of the data and at least one HARQ versions of generation are used for transmission in TTI；According to the determining TTI
The resource block quantity of the data is used for transmission in each TTI in Bundling, the life is transmitted by TTI Bundling
Into HARQ versions.By scheme of the present invention, when carrying out data transmission, in each TTI in TTI Bundling
Resource block number can be unequal, so as to flexibly select TBS, improves resource utilization.
Description of the drawings
Fig. 1 is that a kind of TTI Bundling of VoIP business in the relevant technologies transmit schematic diagram；
Fig. 2 is a kind of data transmission method flow diagram of the embodiment of the present invention；
Fig. 3 is the resource structures schematic diagram of uplink TTI Bundling in the embodiment of the present invention one；
Fig. 4 is that a kind of TTI Bundling transmit schematic diagram in the embodiment of the present invention one；
Fig. 5 is that another kind TTI Bundling transmit schematic diagram in the embodiment of the present invention one；
Fig. 6 is that TTI Bundling transmit schematic diagram in the embodiment of the present invention two；
Fig. 7 is that TTI Bundling transmit schematic diagram in the embodiment of the present invention three；
Fig. 8 is that TTI Bundling transmit schematic diagram in the embodiment of the present invention four.
Specific embodiment
The present invention basic thought be：According to the data of transmission, determine to be used to pass in each TTI in TTI Bundling
The resource block quantity of the defeated data and at least one HARQ versions of generation；According in the determining TTI Bundling
Each TTI in be used for transmission the resource block quantity of the data, the HARQ versions of the generation are transmitted by TTIBundling
This.
Fig. 2 is a kind of data transmission method flow diagram of the embodiment of the present invention, as shown in Fig. 2, this method includes：
Step 201：According to the data of transmission, determine to be used for transmission the data in each TTI in TTI Bundling
Resource block quantity and at least one HARQ versions of generation；
Here, if K resource in N number of TTI need to be occupied comprising N number of TTI, the data of transmission in TTI Bundling
Block, the K are configured no more than system bandwidth, then the data according to transmission, determine in each TTI in TTI Bundling
Being used for transmission the resource block quantity of the data can be：
In N number of TTI in TTI Bundling ,+1 resource block of each TTI distribution floor (K/N) in R TTI is used
In transmitting the data, in addition each TTI distribution floor (K/N) a resource blocks in N-R TTI are used for transmission the data,
Wherein, R=K mod N.
It should be noted that the position of the R TTI determines according to default configuration or according to the rrc layer from base station
Management message or physical layer resources are authorized signaling and are determined.For theoretically, the position of R TTI shares number of combinations in N number of TTI
Kind configuration, the position of the R TTI determines to refer to according to default configuration：It is one kind therein by the position default location of R TTI；
Rrc layer management message of the basis from base station determines to refer to：It is one kind therein by the position default location of R TTI；It is described
Signaling is authorized according to the physical layer resources from base station to determine to refer to：From CN RKind configuration selects completely or partially to be configured as candidate,
The configuration that signaling determines that current transmission uses is authorized by physical layer.
Step 202：The resource of the data is used for transmission in each TTI in the determining TTI Bundling
Number of blocks transmits the HARQ versions of the generation by TTI Bundling.
Here, the length of each HARQ versions of generation can be floor (M*Nsc/N) or M*Nsc, wherein, M is adjusts
Grade processed, Nsc are the sum of data subcarrier in K resource block, and N is the number of TTI in TTI Bundling.
It should be noted that the number of the HARQ versions of generation is generally preset parameter.
It should be noted that present invention is generally used in OFDM or OFDMA system, since there are multiple subcarriers, data
Carrier wave refers to be used for transmission the subcarrier of data, generally refers to removing and is used for transmission subcarrier after pilot tone and/or reference signal.
Optionally, the HARQ versions include physical layer CRC check.
It should be noted that when the length of each HARQ versions is M*Nsc, each HARQ versions are respectively by N number of TTI
K resource block is transmitted；When the length of each HARQ versions is floor (M*Nsc/N), each HARQ versions pass through 1 respectively
Or+1 resource block of floor (K/N) in 2 TTI is transmitted.
It should be noted that the length of HARQ versions when floor (M*Nsc/N) or M*Nsc are both for single layer.
Layer number refer in mimo systems can in same wireless resource the data flow of parallel transmission number.
Heretofore described data can be VoIP business datums or data service data.
The present invention also correspondingly proposes a kind of data transmission system, which includes：Determining module, generation
Module and transmission module；Wherein,
The determining module for the data according to transmission, determines to be used for transmission in each TTI in TTI Bundling
The resource block quantity of the data；
The generation module for the data according to transmission, generates at least one hybrid automatic repeat-request HARQ versions；
The transmission module, for being used in each TTI in the TTI Bundling that are determined according to the determining module
The resource block quantity of the data is transmitted, the HARQ versions of the generation module generation are transmitted by TTI Bundling.
Optionally, K resource block in N number of TTI need to be occupied comprising N number of TTI, the data of transmission in TTI Bundling,
The K is configured no more than system bandwidth,
The determining module, specifically for determining in N number of TTI in TTI Bundling, each TTI points in R TTI
The data are used for transmission with+1 resource block of floor (K/N), in addition each TTI distribution floor (K/N) in N-R TTI
A resource block is used for transmission the data, wherein, R=K mod N.
Optionally, the determining module is additionally operable to determine the position of the R TTI or according to next according to default configuration
Message is managed from the rrc layer of base station or physical layer resources authorize the position that signaling determines the R TTI.
Optionally, the generation module is floor (M*Nsc/N) or M*Nsc specifically for generation HARQ Version lengths
HARQ versions, wherein, M is modulation levels, and Nsc is the sum for removing the usable data subcarriers after pilot tone in K resource block,
N is the number of TTI in TTI Bundling.
Optionally, the HARQ versions include physical layer CRC check.
Optionally, the transmission module, specifically for the length in each HARQ versions be M*Nsc when, respectively by N number of
K resource block in TTI transmits each HARQ versions；When the length of each HARQ versions is floor (M*Nsc/N), lead to respectively
+ 1 resource block of floor (K/N) crossed in 1 or 2 TTI transmits each HARQ versions.
Technical scheme of the present invention is described in further detail with reference to specific embodiment.
Embodiment one
In the present embodiment, TTI number N=4 that TTI Bundling are included, and 4 TTI are continuous in TTI Bundling
's.The present embodiment is that 4 TTI in TTI Bundling are assigned with 18 RB, i.e. K=18 altogether, in the LTE that bandwidth is 10MHz
In system, correspondence system band width configuration NRBBe 50, i.e. 50 resource block (Resouce Block, RB) (resource block acute pyogenic infection of finger tip two here
Two resource blocks in a time slot, as shown in Figure 3.Because two resource blocks in resource allocation in two time slots must be simultaneously
Distribution, and by a logical resource block index instruction, so in the case that not causing ambiguity, abbreviation resource block, no
It repeats again).
According to the foregoing description, distribution method of the K resource block in N number of TTI is as follows：
When K can be evenly divisible by N：
In N number of TTI in TTI Bundling, K/N resource block is distributed in each TTI；
When K cannot be evenly divisible by N：
Each TTI distribution floor (K/N)+1 resource block in R TTI in N number of TTI in TTI Bundling；
Each TTI distribution floor (K/N) a resource blocks in N-R TTI in N number of TTI in TTI Bundling.
By the application of above-mentioned distribution method in this present embodiment, due to R=K mod N=18mod 4=2, so, it is preceding R
=2 TTI (TTI t, TTI t+1) distribute floor (18/4)+1=5 RB, rear N-R=2 TTI (TTI t+2, TTI respectively
T+3 floor (18/4)=4 RB) is distributed respectively.
Because R=2 TTI is selected to distribute 5 RB from N=4 TTI, C is shared4 2=6 kinds of possibility, according in invention
The therein a kind of possibly as default configuration of use is stated, i.e. the first two TTI respectively distributes 5 RB.It can also select in 6 kinds of possibility
It is several as candidate, and receiving terminal, such as 2 kinds of (the first two TTI of selection are notified by signaling that base station is sent：TTI t,
TTI t+1, latter two TTI：TTI t+2, TTI t+3), it is authorized and signaled by physical layer resources.
It should be noted that：R=2 in the present embodiment, and the value range of R is 0 to the integer between N-1.For example, K=
When 17, this similar scenes of R=1 repeat no more.
In the present embodiment, the H version of HARQ is generated, the length of each version is：
Floor (M*Nsc/N), wherein, M is modulation levels, and Nsc is to remove the data available after pilot tone in K resource block
The sum of subcarrier；
Fig. 3 is the resource structures schematic diagram of uplink TTI Bundling in the embodiment of the present invention one, as shown in figure 3, each
Resource block time domain includes 14 symbols, two of which demodulated reference signal, and frequency domain includes 12 subcarriers, therefore, each resource
Block has (14-2) * 12=144 subcarriers.
If K=18, modulation system QPSK, then M=2, then the length of each version be：
Floor (M*Nsc/N)=floor (2*144*18/4)=1296, i.e. HARQ RV x, HARQ RVy, HARQ RV
Z, the length of HARQ RV w is 1296bits.Corresponding TTI Bundling transmission schematic diagrames are as shown in Figure 4.
In addition, because 2*144*4=1152 bits can be transmitted in 4 resource blocks altogether, but HARQ Version lengths are 1296 ratios
Spy, therefore be that cannot transfer 1296 bits, therefore also to occupy in another TTI for the TTI for only including 4 resource blocks
Part resource needs to occupy 2 TTI, for including the TTI of 5 resource blocks, then a HARQ can be completed in 1 TTI
The transmission of version.
Alternatively,
Each the length of version is：M*Nsc, wherein, M is modulation levels, after Nsc is removes pilot tone in K resource block
The sum of usable data subcarriers；
If K=18, modulation system QPSK, then M=2, then the length of each version be：
M*Nsc=2*144*18=5184.
That is HARQ RV x, HARQ RV y, HARQ RV z, HARQ RV w length be 5184bits, corresponding TTI
Bundling transmission schematic diagrames are as shown in Figure 5.
Embodiment two
Fig. 6 is that TTI Bundling transmit schematic diagram in the embodiment of the present invention two, and TTIBundling is transmitted in the embodiment
The TTI numbers included be it is fixed, such as 4, but 4 TTI are discontinuous in time interval binding, due to scheduling conflict,
Cause third TTI that can not be assigned, first three TTI and the 5th TTI together constitutes TTI Bundling in this way, still ties
It has tied up 4 TTI to transmit together, but time domain width is 5 TTI, so as to increase the flexibility of scheduling of resource.
The specific distribution principle and version generating principle of the present embodiment are similar with embodiment one, in order to improve efficiency of transmission,
A suitable TBS is configured for outgoing data, is that 4 TTI in TTI Bundling are assigned with 18 RB altogether in Fig. 6, wherein
The first two TTI occupies 5 RB respectively, latter two TTI occupies 4 RB respectively.
Embodiment three
Fig. 7 is that TTI Bundling transmit schematic diagram in the embodiment of the present invention three, and in the present embodiment, TTIBundling is passed
The defeated TTI numbers included be it is fixed, such as 4, but 4 TTI are discontinuous in time interval binding.In order to increase TTI
Bundling obtains the time diversity gain of bigger in transmission, by transmissions of 4 TTI in 8 TTI, is divided into 1 TTI.
The specific distribution principle and version generating principle of the present embodiment are similar with embodiment one, in order to improve efficiency of transmission,
A suitable TBS is configured for outgoing data, Fig. 7 is that 4 TTI in TTI Bundling are assigned with 18 RB altogether, wherein before
Two TTI occupy 5 RB respectively, latter two TTI occupies 4 RB respectively.
It needs to illustrate：1 TTI in interval only examples, it is also possible to be spaced multiple TTI, the difference is that propagation delay time
It is different from the time diversity gain of acquisition.
Example IV
Fig. 8 is that TTI Bundling transmit schematic diagram in the embodiment of the present invention four, and in the embodiment, TTIBundling is passed
The defeated TTI numbers included be it is fixed, such as 4, and 4 TTI are continuous..
The specific distribution principle and version generating principle of the present embodiment are similar with embodiment one, in order to improve efficiency of transmission,
A suitable TBS is configured for outgoing data, Fig. 8 is that 4 TTI in TTI Bundling are assigned with 18 RB altogether, wherein before
Two TTI occupy 5 RB respectively, latter two TTI occupies 4 RB respectively.But the difference of the embodiment and embodiment one to three exists
In being that 1 HARQ version is only sent in 4 TTI in Fig. 8.For example, it is had sent in a TTI Bundling is transmitted one long
The HARQ RV x for M*Nsc=2*144*18=5184 are spent, the HARQ RV that another length is 5184 are had sent when retransmitting
y。
It should be noted that：Embodiment one to four can also be combined with each other, and form different schemes.For example, embodiment three
It can be combined with example IV, form new scheme, is i.e. 4 TTI in TTI Bundling are discontinuous, are divided into 1
A TTI, but 4 TTI only send the HARQ versions that a length is 5184.Due to the basic principle of other schemes that may be combined
It has explained, has repeated no more in embodiment one to four.
It should be noted that the transmitting terminal in the present invention can be the equipment such as base station, Home eNodeB, relay station, it can also
It is communication terminal, laptop, handheld computer etc..Similarly, receiving terminal is used to receive the data-signal of transmitting terminal, receiving terminal
Can be the control devices such as the terminal devices such as mobile phone, laptop, handheld computer or base station, relay station.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
All any modification, equivalent and improvement made within the spirit and principles in the present invention etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of data transmission method, which is characterized in that this method includes：
According to the data of transmission, determine to be used for transmission in each TTI in Transmission Time Interval binding TTI Bundling described
The resource block quantity of data and at least one hybrid automatic repeat-request HARQ versions of generation；
The resource block quantity of the data is used for transmission in each TTI in the determining TTI Bundling, is passed through
TTI Bundling transmit the HARQ versions of the generation；
The HARQ versions include physical layer CRC check.
2. data transmission method according to claim 1, which is characterized in that comprising N number of TTI in TTI Bundling, pass
Defeated data need to occupy K resource block in N number of TTI, and the K is configured no more than system bandwidth,
The data according to transmission determine to be used for transmission the resource block of the data in each TTI in TTI Bundling
Quantity is：
In N number of TTI in TTI Bundling, each TTI distribution floor (K/N)+1 resource block in R TTI is used to pass
The defeated data, in addition in N-R TTI each TTI distribution floor (K/N) a resource block be used for transmission the data,
In, R=K mod N.
3. data transmission method according to claim 2, which is characterized in that
The N is determined according to default configuration or is authorized signaling according to the rrc layer management message from base station or physical layer resources
It determines,
The K authorizes signaling according to the physical layer resources from base station and determines,
The position of the R TTI determines according to default configuration or according to rrc layer management message or physical layer from base station
Resource is authorized signaling and is determined.
4. data transmission method according to any one of claims 1 to 3, which is characterized in that the data according to transmission
Generating at least one HARQ versions is：
The length of each HARQ versions is floor (M*Nsc/N) or M*Nsc,
Wherein, M is modulation levels, and Nsc is the sum of data subcarrier in K resource block, and N is TTI in TTI Bundling
Number.
5. data transmission method according to claim 4, which is characterized in that
When the length of each HARQ versions is M*Nsc, each HARQ versions are passed respectively by K resource block in N number of TTI
It is defeated；
When the length of each HARQ versions is floor (M*Nsc/N), each HARQ versions are respectively by 1 or 2 TTI
+ 1 resource block of floor (K/N) is transmitted.
6. a kind of data transmission system, which is characterized in that the data transmission system includes：Determining module, generation module and transmission
Module；Wherein,
The determining module for the data according to transmission, determines to be used for transmission in each TTI in TTI Bundling described
The resource block quantity of data；
The generation module for the data according to transmission, generates at least one hybrid automatic repeat-request HARQ versions；
The transmission module, for being used for transmission in each TTI in the TTI Bundling that are determined according to the determining module
The resource block quantity of the data transmits the HARQ versions of the generation module generation by TTI Bundling；
The HARQ versions include physical layer CRC check.
7. data transmission system according to claim 6, which is characterized in that comprising N number of TTI in TTI Bundling, pass
Defeated data need to occupy K resource block in N number of TTI, and the K is configured no more than system bandwidth,
The determining module, specifically for determining in N number of TTI in TTI Bundling, each TTI distribution in R TTI
+ 1 resource block of floor (K/N) is used for transmission the data, and in addition each TTI distribution floor (K/N) in N-R TTI are a
Resource block is used for transmission the data, wherein, R=K mod N.
8. data transmission system according to claim 7, which is characterized in that
The determining module is additionally operable to determine the position of the R TTI or according to the RRC from base station according to default configuration
Layer-management message or physical layer resources authorize the position that signaling determines the R TTI.
9. according to claim 6 to 8 any one of them data transmission system, which is characterized in that
The generation module, the HARQ versions for being floor (M*Nsc/N) or M*Nsc specifically for generation HARQ Version lengths,
Wherein, M is modulation levels, and Nsc is the sum for removing the usable data subcarriers after pilot tone in K resource block, N TTI
The number of TTI in Bundling.
10. data transmission system according to claim 9, which is characterized in that
When the transmission module specifically for the length in each HARQ versions is M*Nsc, pass through K in N number of TTI respectively
Resource block transmits each HARQ versions；When the length of each HARQ versions is floor (M*Nsc/N), pass through 1 or 2 respectively
+ 1 resource block of floor (K/N) in TTI transmits each HARQ versions.
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