CN103457708A - Method and device for transmitting data - Google Patents
Method and device for transmitting data Download PDFInfo
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- CN103457708A CN103457708A CN2012101831732A CN201210183173A CN103457708A CN 103457708 A CN103457708 A CN 103457708A CN 2012101831732 A CN2012101831732 A CN 2012101831732A CN 201210183173 A CN201210183173 A CN 201210183173A CN 103457708 A CN103457708 A CN 103457708A
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Abstract
The invention discloses a method and device for transmitting data. The method comprises the steps that a first time frequency resource occupied when a TTI Bundling enhanced transmission mode is adopted to transmit the data is confirmed, wherein the first time frequency resource at least comprises a second time frequency resource occupied when the data are transmitted by adopting a TTI Bundling transmission mode, and the RTT of the TTI Bundling enhanced transmission mode is smaller than or equal to that of the TTI Bundling transmission mode; the data are sent on the first time frequency resource through the TTI Bundling enhanced transmission mode. Through the method and device, the encoding performance of data transmission is improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of data transmission method and device.
Background technology
Power system capacity and the network coverage are two important performance index of mobile radio system.For example, at Long Term Evolution (Long Term Evolution, referred to as LTE) in system, descending OFDM access (the Orthogonal Frequency Division Multiple Access that adopted, referred to as OFDMA) technology, up single carrier-frequency division multiple access access (the Single Carrier-Frequency Division Multiple Access that adopted, referred to as SC-FDMA) technology, but due to the networking of general employing identical frequency process, presence of intercell interference (Inter-Cell Interference, referred to as ICI) increases obviously.In order to reduce ICI, LTE has adopted a lot of Anti-Jamming Techniques.
Aspect power management, descending inter-cell interference cancellation (Inter-Cell Interference Cancellation, referred to as ICIC) technology is based on enode b (evolved Node B, referred to as eNodeB) Relative Narrowband TX Power (Relative Narrowband TX Power, referred to as RNTP) restriction method realize descending interference prompting function in advance, strengthened the covering performance of physical down Traffic Channel (Physical Downlink Shared Channel, referred to as PDSCH); Up ICIC technology is based on (High Interference Indication/Overload Indication, referred to as HII/OI) method realize to disturb indication and load to indicate, strengthened the covering performance of physical uplink Traffic Channel (Physical Uplink Shared Channel, referred to as PUSCH).
Aspect chnnel coding (Channel Coding), LTE has adopted high performance Turbo code and tail-biting convolutional code, makes data can resist the various declines of channel.For Turbo code, for the resource block structures of LTE system, efficient interleaver and rate-matched function have been designed.
At multiple-input and multiple-output (Multiple Input Multiple Output, referred to as MIMO) aspect, the MIMO technology is passed through space diversity, spatial reuse and beam forming technique also can improve covering performance and the volumetric properties of LTE system, especially the coordinate multipoint that technical development is got up based on MIMO (Coordinated Multiple Point, referred to as CoMP) technology.But due to current network with in following a period of time, terminal (User Equipment, referred to as UE) is single antenna and sends, and MIMO technology and CoMP technology are limited for up improvement, can only improve by the reception (Joint Receiver, referred to as JR) of combining of receiving terminal.
Can improve the transmission performance of system although there are numerous technology in the LTE system, especially network covering property, but the PUSCH while by network test and software emulation, confirming moderate rate, PDSCH during two-forty and VoIP business remain in the LTE system the limited channel of covering performance in each channel.Wherein main cause is: the transmitted power of UE is limited cause the PUSCH of moderate rate and VoIP limited, and the ICI between base station causes the PDSCH of two-forty limited.The LTE system has been introduced Transmission Time Interval (Transmission Time Interval, referred to as TTI) binding (Bundling) technology for this reason.TTI Bundling technology forms different redundancy versions to whole packet by chnnel coding, different redundancy versions transmits respectively in continuous TTI, TTI Bundling technology is by taking more transfer resource, obtain coding gain and diversity gain, to obtain higher received energy and link signal to noise ratio, thereby improve the covering power of LTE system.
For example, be illustrated in figure 1 TTI Bundling transmission schematic diagram, it is example that the business of transmission be take voice (VoIP).First VoIP of UE wraps on 4 continuous Transmission Time Intervals of Physical Uplink Shared Channel PUSCH and carries out the 1st transmission, 4 continuous TTI are called as the TTI Bundling that a TTI binding length (TTI Bundling Size) is 4, the control information of TTI Bundling transmission (for example, resource location etc.) the down control channel PDCCH indication in corresponding TTI by first TTI in TTI Bundling, for example, after receiving terminal (base station) is received this TTI Bundling, the downlink physical HARQ indicating channel PHICH(Physical HARQ Indication Channel that last TTI is corresponding in TTI Bundling, referred to as PHICH) upper indication mixed automatic retransfer request (Hybrid Automatic Repeat Request, referred to as HARQ) ack/nack (Acknowledge/Non-Acknowledge of entity, referred to as ACK/NACK) response message, if being negative NACK, respective acknowledgement replys, UE carries out 2 TTI Bundling transmission (i.e. the re-transmission for the first time of this TTI Bundling) after 16 TTI, HARQ mechanism is with transmission principle is identical for the first time.By that analogy, until respective acknowledgement is that ACK replys certainly, or reached the maximum trial the number of transmissions (for example, 3 times) allowed, first VoIP bag transmission ending.Similarly, the transmission of n VoIP bag is identical with first VoIP bag transmission principle, repeats no more.In round-trip (Round Transmission Time, RTT), while being 16ms, when each VoIP bag transmits 3 times in the TTI Bundling mode of TTI Bundling Size=4, time delay is 36ms, and transmitting is for 4 times 52ms, for example as shown in Figure 2.VoIP is the real time business of delay sensitive, and the time delay of eating dishes without rice or wine is generally lower than 50ms, so require and the system characteristics according to the end terminal delay time, scheduler determines that the transmission times of actual HARQ is 3 times or 4 times.
For existing TTI Bundling, the HARQ version that can send at most is 12 or 16, and corresponding propagation delay time is 36ms or 52ms, and the arrival interval of VoIP is 20ms, so, strengthen in addition in theory space.For example, TTI Bundling Size is that 4, HARQ maximum times is that 5, RTT is 8ms or 12ms, and corresponding propagation delay time is 36ms and 52ms, but can send 20 HARQ versions, realizes more energy accumulation.Perhaps, TTI Bundling Size is that 5, HARQ maximum times is that 4, RTT is 15ms, and corresponding propagation delay time is 50ms, also can send 20 HARQ versions, realizes more energy accumulation.But these enhanced scheme are a shortcoming all, has changed RTT, has changed the timing of HARQ, very large on the existing system impact, can not forward compatibility.
Strengthen for TTI Bundling in correlation technique the problem that transmission can not realize backward compatibility, not yet propose at present effective solution.
Summary of the invention
Strengthen for TTI Bundling the problem that transmission can not realize backward compatibility, the invention provides a kind of data transmission method and device, at least to address this problem.
According to an aspect of the present invention, a kind of data transmission method is provided, comprise: determine the first running time-frequency resource shared while adopting Transmission Time Interval binding TTI Bundling to strengthen transmission means transmission data, wherein, described the first running time-frequency resource at least comprises the second running time-frequency resource shared when described the data TTI Bundling transmission means is transmitted, and described TTIBundling strengthens the RTT that the round-trip RTT transmitted is less than or equal to described TTI Bundling transmission; Strengthen transmission means by TTI Bundling and send data on described the first running time-frequency resource.
Preferably, described RTT refers to the time domain interval of two continuous Transmission Time Interval binding TTI Bundle.
Preferably, to strengthen the time-domain position of the physical mixed automatic repeat request indicating channel PHICH in transmission means identical with the time-domain position of PHICH in described TTI Bundling transmission means for described TTI Bundling.
Preferably, to strengthen the time-domain position of the physical downlink control channel PDCCH in transmission means identical with the time-domain position of PDCCH in described TTI Bundling transmission means for described TTI Bundling.
Preferably, the TTI that described TTI Bundling transmission means carries out when transfer of data reaches maximum transmission times taking is 12 or 16, and the TTI that described TTI Bundling enhancing transmission means carries out when transfer of data reaches maximum transmission times taking is 20.
Preferably, to strengthen the time-domain position of the time-domain position of 12 or 16 TTI in 20 shared TTI of transmission means, 12 or 16 TTIs shared with described TTI Bundling transmission means identical for described TTI Bundling.
Preferably,, 12 and 16 the number of transmissions corresponding to TTI that described TTI Bundling transmission means takies are respectively 3 and 4, and it is 4 that described TTI Bundling strengthens shared the number of transmissions corresponding to 20 TTI of transmission means.
Preferably, it is 4 o'clock that described TTI Bundling strengthens shared the number of transmissions corresponding to 20 TTI of transmission means, for the second time for the first time,, the TTI Bundle size of transmission is 4 TTI for the third time, the TTI Bundle of the 4th transmission is the TTI Bundle that two length are 4 TTI, or is the TTI Bundle that a length is 8 TTI.
Preferably, corresponding 1 PHICH of the TTI Bundle of described the 4th transmission, or corresponding 0 PHICH.
Preferably, corresponding 0 of the TTI Bundle of described the 4th transmission, 1 or 2 PDCCH channels.
Preferably, when corresponding 0 the PDCCH channel of the TTI Bundle of described the 4th transmission, the schedule information of the TTI Bundle of described the 4th transmission by for the first time, for the second time or this transmit for the third time corresponding PDCCH indication; When corresponding 1 the PDCCH channel of the TTI Bundle of described the 4th transmission, in described the 4th transmission the schedule information of front 4 TTI of 8 TTI by for the first time, for the second time or this transmit for the third time corresponding PDCCH indication, the PDCCH indication that the schedule information of rear 4 TTI of these 8 TTI is corresponding by rear 4 TTI, or by last 8 TTI, corresponding PDCCH indicates; When corresponding 2 the PDCCH channels of the TTI Bundle of described the 4th transmission, the PDCCH indication that the schedule information of front 4 TTI in described the 4th transmission in 8 TTI is corresponding by these front 4 TTI, the PDCCH indication that the schedule information of rear four TTI in these 8 TTI is corresponding by these rear 4 TTI.
Preferably, the length that described TTI Bundling strengthens the TTI Bundle of transmission means is 4 or 8, and the length of the TTI Bundle of described TTI Bundling transmission means is 4.
Preferably, the RTT of described TTI Bundling transmission means is 16ms, and the RTT that described TTI Bundling strengthens latter two TTI Bundle in transmission means is 12ms, and the RTT between other TTI Bundle is 16ms.
According to a further aspect in the invention, a kind of data transmission device is provided, comprise: determination module, be used for determining the first running time-frequency resource shared when adopting Transmission Time Interval binding TTI Bundling to strengthen transmission means transmits data, wherein, described the first running time-frequency resource at least comprises the second running time-frequency resource shared when described the data TTI Bundling transmission means is transmitted, and the round-trip RTT of described TTI Bundling enhancing transmission means is less than or equal to the RTT of described TTI Bundling transmission means; Transport module, send data on described the first running time-frequency resource, by TTI Bundling, strengthening transmission means.
Preferably, the time-domain position of the physical mixed automatic repeat request indicating channel PHICH in described TTI Bundling enhancing transmission is identical with the time-domain position of described TTI Bundling transmission.
Preferably, described TTI Bundling strengthens in transmission identical or indicated by new physical downlink control channel PDCCH with compare schedule information that schedule information and the described TTI Bundling of a plurality of TTI of increasing transmit of described TTI Bundling transmission.
Preferably, the TTI that described TTI Bundling transmission means carries out when transfer of data reaches maximum transmission times taking is 12 or 16, and described TTI Bundling strengthens transmission means and carries out transfer of data to reach the TTI that maximum transmission times takies be 20.
Preferably, the length that described TTI Bundling strengthens the TTI Bundle of transmission means is 4 or 8, and the length of the TTI Bundle of described TTI Bundling transmission means is 4.
Preferably, the RTT of described TTI Bundling transmission means is 16ms, and the RTT that described TTI Bundling strengthens latter two TTI Bundle in transmission means is 12ms, and the RTT between other TTI Bundle is 16ms.
By the present invention, employing is carried out TTI Bundling enhancing and is transmitted the second running time-frequency resource that the first running time-frequency resource that carries out transfer of data comprises that these data are transmitted by TTI Bundling, can realize the backward compatibility of TTI Bundling, simultaneously, because TTIBundling strengthens the RTT between the TTIBundling that RTT between the TTI Bundling of transmission is less than or equal to this TTI Bundling transmission, can be so that transmit more TTI Bundling within the identical time interval, improved coding gain, can improve to a certain extent the covering power of system.
The accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the time interval binding transmission schematic diagram one according to correlation technique;
Fig. 2 is the flow chart according to the data transmission method of the embodiment of the present invention;
Fig. 3 is the structured flowchart according to the data transmission device of the embodiment of the present invention;
Fig. 4 is the time interval binding transmission schematic diagram two according to the embodiment of the present invention;
Fig. 5 strengthens transmission schematic diagram one according to the time interval binding of the embodiment of the present invention;
Fig. 6 strengthens transmission schematic diagram two according to the time interval binding of the embodiment of the present invention;
Fig. 7 strengthens transmission schematic diagram three according to the time interval binding of the embodiment of the present invention;
Fig. 8 strengthens transmission schematic diagram four according to the time interval binding of the embodiment of the present invention;
Fig. 9 strengthens transmission schematic diagram five according to the time interval binding of the embodiment of the present invention; And
Figure 10 strengthens transmission schematic diagram six according to the time interval binding of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that do not conflict, embodiment and the feature in embodiment in the application can combine mutually.
The present embodiment provides a kind of data transmission method, and Fig. 2 is the flow chart according to the data transmission method of the embodiment of the present invention, comprises that following step S202 is to step S204.
Step S202: determine the first running time-frequency resource shared while adopting TTI Bundling to strengthen transmission means transmission data, wherein, this first running time-frequency resource at least comprises the second running time-frequency resource shared when this data TTI Bundling transmission means is transmitted, and the RTT of this TTI Bundling enhancing transmission means is less than or equal to the RTT of TTI Bundling transmission means;
Step S204: strengthen transmission means by TTI Bundling and send data on the first running time-frequency resource.
Pass through above-mentioned steps, data carry out the first running time-frequency resource that TTI Bundling strengthens transmission comprise these data (if) by the second running time-frequency resource of TTI Bundling transmission, can realize the backward compatibility of TTI Bundling, simultaneously, because TTIBundling strengthens the RTT between the TTIBundling that RTT between the TTI Bundling of transmission is less than or equal to this TTI Bundling transmission, can so that, the more TTI Bundling of transmission within the identical time interval, improved coding gain, can improve to a certain extent the covering power of system.
Need so-called backward compatibility to comprise: a transmitting terminal can adopt TTI Bundling to strengthen transmission means or TTIBundling transmission means, if while adopting TTI Bundling to strengthen transmission means transmission data, if the part in the running time-frequency resource of transmitting terminal confirmation TTI Bundling enhancing transmission means is necessarily identical with the running time-frequency resource that adopts TTI Bundling transmission means to take, at least time-domain position is identical, thereby guarantee that transmitting terminal can adopt identical strategy, for example, for the sending strategy of PDCCH and PHICH.For receiving terminal when receiving and transmitting terminal similar, repeat no more.
In the present embodiment, RTT refers to the time domain interval of two continuous Transmission Time Interval binding TTIBundle.
When implementing, in order to improve the backwards compatibility of transfer of data, the time-domain position that TTI Bundling strengthens the PHICH in transmission is identical with the time-domain position of this TTI Bundling transmission, in the preferred embodiment, the timing mechanism of the PHICH of TTI Bundling enhancing transmission and the timing mechanism of TTI Bundling are constant, reduce the complexity of configuration simultaneously.
In order to improve the scheduling consistency, the time-domain position of the PDCCH in this TTI Bundling enhancing transmission means is identical with the time-domain position of the PDCCH in the TTIBundling transmission means.
As an execution mode preferably, the TTI that TTI Bundling transmission means carries out when transfer of data reaches maximum transmission times taking is 12 or 16, and the TTI that TTI Bundling enhancing transmission means carries out when transfer of data reaches maximum transmission times taking is 20.
In order to realize backward compatibility and to reduce the complexity of configuration, the time-domain position that TTI Bundling strengthens the time-domain position of 12 or 16 TTI in 20 shared TTI of transmission means, 12 or 16 TTIs shared with TTI Bundling transmission means is identical.
Preferably, 12 and 16 the number of transmissions corresponding to TTI that TTI Bundling transmission means takies be respectively 3 and 4, TTIBundling to strengthen shared the number of transmissions corresponding to 20 TTI of transmission means be 4.Strengthening shared the number of transmissions corresponding to 20 TTI of transmission means at TTI Bundling is 4 o'clock, for the second time for the first time,, the TTI Bundle size of transmission is 4 TTI for the third time, the TTI Bundle of the 4th transmission is the TTI Bundle that two length are 4 TTI, or is the TTI Bundle that a length is 8 TTI.In order to realize the flexibility of timing mechanism, the corresponding PHICH of the TTI Bundle of the 4th transmission or corresponding 0 PHICH.
Preferably, corresponding 0 of the TTI Bundle of the 4th transmission, 1 or 2 PDCCH channels.
Corresponding to three kinds of situations of TTI Bundle of above-mentioned the 4th transmission, can adopt different scheduling mode indications:
For example: when corresponding 0 the PDCCH channel of the TTI Bundle of the 4th transmission, the schedule information of the TTI Bundle of the 4th transmission by for the first time, for the second time or this transmit for the third time corresponding PDCCH indication.
When corresponding 1 the PDCCH channel of the TTI Bundle of the 4th transmission, in the 4th transmission the schedule information of front 4 TTI of 8 TTI by for the first time, for the second time or this transmit for the third time corresponding PDCCH indication, the PDCCH indication that the schedule information of rear 4 TTI of these 8 TTI is corresponding by rear 4 TTI, or by last 8 TTI, corresponding PDCCH indicates.
When corresponding 2 the PDCCH channels of the TTI Bundle of the 4th transmission, the PDCCH indication that the schedule information of front 4 TTI in the 4th transmission in 8 TTI is corresponding by these front 4 TTI, the PDCCH indication that the schedule information of rear four TTI in these 8 TTI is corresponding by these rear 4 TTI.
In order to realize the compatibility of system, the length that TTI Bundling strengthens the TTI Bundle of transmission means be 4 or the Bundling Size of 8, TTIBundling transmission be 4.It should be noted that, along with the difference development of communication protocol, the size that the Bundling Size of TTI Bundling enhancing transmission and this TTI Bundling transmission adopts can change and change according to agreement.
Preferably, the RTT of this TTI Bundling transmission means is 16ms, and the RTT that this TTI Bundling strengthens latter two TTI Bundle in transmission means is 12ms, and the RTT between other TTI Bundle is 16ms.The repeatedly TTI Bundling transmission that the preferred embodiment has realized at the same time interval.
It should be noted that, in the step shown in the flow chart of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out, and, although there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order be different from herein.
In another embodiment, also provide a kind of data transmission software, the technical scheme that this software is described for carrying out above-described embodiment and preferred embodiment.
In another embodiment, also provide a kind of storage medium, stored above-mentioned data transmission software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
The embodiment of the present invention also provides a kind of data transmission device, this data transmission device can be for realizing above-mentioned data transmission method and preferred implementation, carried out explanation, repeated no more, below the module related in this data transmission device had been described.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described system and method for following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.
Fig. 3 is the structured flowchart according to the data transmission device of the embodiment of the present invention, and this device comprises: determination module 32, transport module 34, below be described in detail said structure.
In the present embodiment, RTT refers to the time domain interval of two continuous Transmission Time Interval binding TTI Bundle.
When implementing, in order to improve the backwards compatibility of transfer of data, the time-domain position that TTI Bundling strengthens the PHICH in transmission is identical with the time-domain position of this TTI Bundling transmission, in the preferred embodiment, the timing mechanism of the PHICH of TTI Bundling enhancing transmission and the timing mechanism of TTI Bundling are constant, reduce the complexity of configuration simultaneously.
In order to improve the scheduling consistency, the time-domain position of the PDCCH in this TTI Bundling enhancing transmission means is identical with the time-domain position of the PDCCH in TTI Bundling transmission means.
As an execution mode preferably, the TTI that TTI Bundling transmission means carries out when transfer of data reaches maximum transmission times taking is 12 or 16, and the TTI that TTI Bundling enhancing transmission means carries out when transfer of data reaches maximum transmission times taking is 20.
In order to realize backward compatibility and to reduce the complexity of configuration, the time-domain position that TTI Bundling strengthens the time-domain position of 12 or 16 TTI in 20 shared TTI of transmission means, 12 or 16 TTIs shared with TTI Bundling transmission means is identical.
Preferably, 12 and 16 the number of transmissions corresponding to TTI that TTI Bundling transmission means takies be respectively 3 and 4, TTIBundling to strengthen shared the number of transmissions corresponding to 20 TTI of transmission means be 4.Strengthening shared the number of transmissions corresponding to 20 TTI of transmission means at TTI Bundling is 4 o'clock, for the second time for the first time,, the TTI Bundle size of transmission is 4 TTI for the third time, the TTI Bundle of the 4th transmission is the TTI Bundle that two length are 4 TTI, or is the TTI Bundle that a length is 8 TTI.In order to realize the flexibility of timing mechanism, the corresponding PHICH of the TTI Bundle of the 4th transmission or corresponding 0 PHICH.
Preferably, corresponding 0 of the TTI Bundle of the 4th transmission, 1 or 2 PDCCH channels.
Corresponding to three kinds of situations of TTI Bundle of above-mentioned the 4th transmission, can adopt different scheduling mode indications:
For example: when corresponding 0 the PDCCH channel of the TTI Bundle of the 4th transmission, the schedule information of the TTI Bundle of the 4th transmission by for the first time, for the second time or this transmit for the third time corresponding PDCCH indication.
When corresponding 1 the PDCCH channel of the TTI Bundle of the 4th transmission, in the 4th transmission the schedule information of front 4 TTI of 8 TTI by for the first time, for the second time or this transmit for the third time corresponding PDCCH indication, the PDCCH indication that the schedule information of rear 4 TTI of these 8 TTI is corresponding by rear 4 TTI, or by last 8 TTI, corresponding PDCCH indicates.
When corresponding 2 the PDCCH channels of the TTI Bundle of the 4th transmission, the PDCCH indication that the schedule information of front 4 TTI in the 4th transmission in 8 TTI is corresponding by these front 4 TTI, the PDCCH indication that the schedule information of rear four TTI in these 8 TTI is corresponding by these rear 4 TTI.
In order to realize the compatibility of system, the length that TTI Bundling strengthens the TTI Bundle of transmission means be 4 or the Bundling Size of 8, TTIBundling transmission be 4.It should be noted that, along with the difference development of communication protocol, the size that the Bundling Size of TTI Bundling enhancing transmission and this TTI Bundling transmission adopts can change and change according to agreement.
Preferably, the RTT of this TTI Bundling transmission means is 16ms, and the RTT that this TTI Bundling strengthens latter two TTI Bundle in transmission means is 12ms, and the RTT between other TTI Bundle is 16ms.The repeatedly TTI Bundling transmission that the preferred embodiment has realized at the same time interval.
Below in conjunction with preferred embodiment, describe, following preferred embodiment combines above-described embodiment and preferred implementation.
Preferred embodiment one
This preferred embodiment provides a kind of TTI Bundling of backward compatibility to strengthen transmission method, in communication system, supports TTI Bundling transmission and TTI Bundling to strengthen transmission.The method comprises: the running time-frequency resource that TTI Bundling enhancing transmission takies has comprised the running time-frequency resource that TTI Bundling transmission takies fully.
In this preferred embodiment, as an execution mode preferably, the TTI number that TTI Bundling transmission takies is M, M is 12 or 16, it is 20, the Bundling time-domain position that strengthens M TTI in 20 TTI that transmission takies that TTI Bundling strengthens TTI number that transmission takies and to transmit M the TTI taken identical for TTI Bundling.
When implementing, in order to strengthen the flexibility of scheduling, the schedule information that TTI Bundling strengthens 20-M the TTI increased in transmission is identical with all the other M, or by new PDCCH indication.
In order to realize backward compatibility, the time-domain position that TTI Bundling strengthens the PHICH in transmission is identical with the time-domain position of the PHICH of TTI Bundling.Also, the timing mechanism of the PHICH in TTI Bundling enhancing transmission is identical with the timing mechanism of TTI Bundling.
As an execution mode preferably, the Bundling Size that TTI Bundling strengthens transmission is 4, and the RTT between last twice TTIBundling is 12ms, and the RTT between all the other any twice TTI Bundling is 16ms.
Preferred embodiment two
The present embodiment provides a kind of TTI Bundling to strengthen transmission method, and in the present embodiment, a plurality of TTI in time interval binding can be always not continuous.
In Fig. 1, the Bundling Size of TTI Bundling enhancing transmission is that the RTT between 4, TTI Bundling is 16ms, considers that the time delay of eating dishes without rice or wine of VoIP is no more than 50ms, carries out 3 HARQ transmission, transmits 12 HARQ versions.In order further to strengthen transmission performance, transmit altogether 20 HARQ versions in Fig. 5.
The method of this preferred embodiment comprises: identical in first three TTI Bundling transmission and Fig. 1, the Bundling Size that strengthens transmission is 4, RTT between TTI Bundling is 16ms, the PHICH of HARQ feedback and PDCCH and 1 identical, difference is to have increased the 4th TTI Bundling transmission, and RTT is 12ms.The information such as the frequency domain position of the 4th TTI Bundling transmission, resource quantity can be with in first three time any once identical.
Preferably, the 4th TTI Bundling transmission is as last transmission, and PHICH can not send yet.Strengthen the receiving terminal of transmission for the TTI Bundling that supports TTI Bundling to strengthen transmission and to enable, only need to go to receive according to above-mentioned rule and get final product.
Preferred embodiment three
The present embodiment provides a kind of TTI Bundling to strengthen transmission method, and in the present embodiment, a plurality of TTI in time interval binding can be always not continuous.
This preferred embodiment is with the difference of preferred embodiment two: the schedule information of the 4th TTI Bundling transmission of increase is by new PDCCH indication.Wherein, in Fig. 6, the time-domain position of PDCCH is to need the PDCCH time-domain position of transmission identical with RTT=16, compatible better; In Fig. 7, the PDCCH time-domain position that the time-domain position of PDCCH need to send with RTT=12 is identical.
Preferred embodiment four
This preferred embodiment provides a kind of TTI Bundling to strengthen transmission method, below in conjunction with Fig. 4 and Fig. 8, the method for this preferred embodiment is described.
In Fig. 4, the Bundling Size of TTI Bundling enhancing transmission is that the RTT between 4, TTI Bundling is 16ms.Loosen the time delay of eating dishes without rice or wine of VoIP to 52ms, carried out 4 HARQ transmission, transmitted 16 HARQ versions.In order further to strengthen transmission performance, transmit altogether 20 HARQ versions in Fig. 5.
The method of this preferred embodiment comprises: retained four TTI Bundling transmission in Fig. 4, and the transmission of PDCCH and PHICH is identical.But TTI Bundling strengthens transmission has sent again a TTI Bundling that BundlingSize is 4 before the 4th TTI Bundling transmission.The information such as the frequency domain position of the TTI Bundling transmission increased, resource quantity can be with in first three time any once identical.
Preferably, the 4th TTI Bundling transmits as last transmission, and PHICH can not send yet, or shares 1 PHICH with the 4th TTI Bundling transmission.Strengthen the receiving terminal of transmission for the TTIBundling that supports TTI Bundling to strengthen transmission and to enable, only need to go to receive according to above-mentioned rule and get final product.
Preferred embodiment five
This preferred embodiment provides a kind of TTI Bundling to strengthen transmission method, below in conjunction with Fig. 9 and Figure 10, the method for this preferred embodiment is described.
This preferred embodiment is with the difference of preferred embodiment four: the excessively new PDCCH indications of information exchange such as the frequency domain position of the TTI Bundling transmission of increase, resource quantity.Wherein, in Fig. 9, the PDCCH time-domain position that the time-domain position of PDCCH need to send with RTT=12 is identical, and the TTI Bundling transmission of increase is shared same PDCCH with the 4th Bundling transmission, more pares down expenses.In Figure 10, the PDCCH time-domain position that the time-domain position of PDCCH need to send with RTT=12 is identical.
It should be noted that, the number designation in the accompanying drawing of above preferred embodiment has identified different TTI and control information corresponding to this TTI in this TTI Bundle.
Preferably, the transmitting terminal in this preferred embodiment can be the equipment such as base station, Home eNodeB, relay station, can be also communication terminal, notebook computer, Hand Personal Computer etc.Similarly, receiving terminal is for the data-signal of receiving end/sending end, and receiving terminal can be the terminal equipments such as mobile phone, notebook computer, Hand Personal Computer, can be also base station, the control appliances such as relay station.
By above-described embodiment, a kind of data transmission method and device are provided, realize the backward compatibility of data TTI Bundling, and improved the coding gain of transfer of data, and improved to a certain extent the covering power of system.It should be noted that, these technique effects are not that above-mentioned all execution modes have, and some technique effect is that some preferred implementation just can obtain.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby they can be stored in storage device and be carried out by calculation element, perhaps they are made into respectively to each integrated circuit modules, perhaps a plurality of modules in them or step being made into to the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (19)
1. a data transmission method is characterized in that comprising:
Determine the first running time-frequency resource shared while adopting Transmission Time Interval binding TTI Bundling to strengthen transmission means transmission data, wherein, if described the first running time-frequency resource at least comprises the second running time-frequency resource shared when described data adopt TTI Bundling transmission means to be transmitted, and the round-trip RTT of described TTI Bundling enhancing transmission means is less than or equal to the RTT of described TTI Bundling transmission means;
Strengthen transmission means by TTI Bundling and send data on described the first running time-frequency resource.
2. method according to claim 1, is characterized in that, described RTT refers to the time domain interval of two continuous Transmission Time Interval binding TTI Bundle.
3. method according to claim 1, it is characterized in that, the time-domain position of the physical mixed automatic repeat request indicating channel PHICH in described TTI Bundling enhancing transmission means is identical with the time-domain position of the PHICH in described TTI Bundling transmission means.
4. method according to claim 1, is characterized in that, the time-domain position of the physical downlink control channel PDCCH in described TTI Bundling enhancing transmission means is identical with the time-domain position of the PDCCH in described TTI Bundling transmission means.
5. method according to claim 1, it is characterized in that, the TTI that described TTI Bundling transmission means carries out when transfer of data reaches maximum transmission times taking is 12 or 16, and the TTI that described TTI Bundling enhancing transmission means carries out when transfer of data reaches maximum transmission times taking is 20.
6. method according to claim 5, it is characterized in that, the time-domain position that described TTI Bundling strengthens the time-domain position of 12 or 16 TTI in 20 shared TTI of transmission means, 12 or 16 TTIs shared with described TTI Bundling transmission means is identical.
7. method according to claim 5, it is characterized in that, 12 and 16 the number of transmissions corresponding to TTI that described TTI Bundling transmission means takies are respectively 3 and 4, and it is 4 that described TTI Bundling strengthens shared the number of transmissions corresponding to 20 TTI of transmission means.
8. method according to claim 7, it is characterized in that, it is 4 o'clock that described TTI Bundling strengthens shared the number of transmissions corresponding to 20 TTI of transmission means, for the second time for the first time,, the TTI Bundle size of transmission is 4 TTI for the third time, the TTI Bundle of the 4th transmission is the TTI Bundle that two length are 4 TTI, or is the TTI Bundle that a length is 8 TTI.
9. according to the described method of claim 7 or 8, it is characterized in that corresponding 1 PHICH of the TTI Bundle of described the 4th transmission, or corresponding 0 PHICH.
10. according to the described method of claim 7 or 8, it is characterized in that corresponding 0 of the TTI Bundle of described the 4th transmission, 1 or 2 PDCCH channels.
11. method according to claim 10, it is characterized in that, when corresponding 0 the PDCCH channel of the TTI Bundle of described the 4th transmission, the schedule information of the TTI Bundle of described the 4th transmission by for the first time, for the second time or this transmit for the third time corresponding PDCCH indication; When corresponding 1 the PDCCH channel of the TTI Bundle of described the 4th transmission, in described the 4th transmission the schedule information of front 4 TTI of 8 TTI by for the first time, for the second time or this transmit for the third time corresponding PDCCH indication, the PDCCH indication that the schedule information of rear 4 TTI of these 8 TTI is corresponding by rear 4 TTI, or by last 8 TTI, corresponding PDCCH indicates; When corresponding 2 the PDCCH channels of the TTI Bundle of described the 4th transmission, the PDCCH indication that the schedule information of front 4 TTI in described the 4th transmission in 8 TTI is corresponding by these front 4 TTI, the PDCCH indication that the schedule information of rear four TTI in these 8 TTI is corresponding by these rear 4 TTI.
12. according to the described method of any one in claim 1 to 11, it is characterized in that, the length that described TTI Bundling strengthens the TTI Bundle of transmission means is 4 or 8, the length of the TTI Bundle of described TTI Bundling transmission means is 4.
13. according to the described method of any one in claim 1 to 11, it is characterized in that, the RTT of described TTI Bundling transmission means is 16ms, and the RTT that described TTI Bundling strengthens latter two TTI Bundle in transmission means is 12ms, and the RTT between other TTI Bundle is 16ms.
14. a data transmission device is characterized in that comprising:
Determination module, be used for determining the first running time-frequency resource shared when adopting Transmission Time Interval binding TTI Bundling to strengthen transmission means transmits data, wherein, described the first running time-frequency resource at least comprises the second running time-frequency resource shared when described the data TTI Bundling transmission means is transmitted, and the round-trip RTT of described TTI Bundling enhancing transmission means is less than or equal to the RTT of described TTI Bundling transmission means;
Transport module, send data on described the first running time-frequency resource, by TTI Bundling, strengthening transmission means.
15. device according to claim 14, is characterized in that, the time-domain position that described TTI Bundling strengthens the physical mixed automatic repeat request indicating channel PHICH in transmission is identical with the time-domain position of described TTI Bundling transmission.
16. device according to claim 14, it is characterized in that, it is identical or indicated by new physical downlink control channel PDCCH with compare schedule information that schedule information and the described TTI Bundling of a plurality of TTI of increasing transmit of described TTIBundling transmission that described TTI Bundling strengthens in transmission.
17. according to claim 14 to the described device of any one in 16, it is characterized in that, the TTI that described TTI Bundling transmission means carries out when transfer of data reaches maximum transmission times taking is 12 or 16, and described TTI Bundling strengthens transmission means and carries out transfer of data to reach the TTI that maximum transmission times takies be 20.
18. according to claim 14 to the described device of any one in 16, it is characterized in that, the length that described TTI Bundling strengthens the TTI Bundle of transmission means is 4 or 8, the length of the TTI Bundle of described TTI Bundling transmission means is 4.
19. according to claim 14 to the described device of any one in 16, it is characterized in that, the RTT of described TTI Bundling transmission means is 16ms, the RTT that described TTI Bundling strengthens latter two TTI Bundle in transmission means is 12ms, and the RTT between other TTI Bundle is 16ms.
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