CN103457708A - Method and device for transmitting data - Google Patents

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

Data transmission method and device

technical field

The present invention relates to the communication field, in particular, to a data transmission method and device.

Background technique

System capacity and network coverage are two important performance indicators of wireless mobile communication systems. For example, in the Long Term Evolution (LTE for short) system, the Orthogonal Frequency Division Multiple Access (OFDMA) technology is used for the downlink, and the single carrier-frequency division multiple access is used for the uplink. Access (Single Carrier-Frequency Division Multiple Access, referred to as SC-FDMA) technology, but due to the general use of the same frequency network, inter-cell interference (Inter-Cell Interference, referred to as ICI) increases significantly. In order to reduce ICI, LTE adopts many anti-jamming technologies.

In terms of power management, the downlink Inter-Cell Interference Cancellation (ICIC) technology is based on the Relative Narrowband TX Power (RNTP) limit of the evolved Node B (eNodeB). The method realizes the pre-warning function of downlink interference, and enhances the coverage performance of the Physical Downlink Shared Channel (PDSCH for short); the uplink ICIC technology is realized based on the method of High Interference Indication/Overload Indication (HII/OI for short) Interference indication and load indication enhance the coverage performance of the Physical Uplink Shared Channel (PUSCH for short).

In terms of channel coding (Channel Coding), LTE uses high-performance Turbo codes and tail-biting convolutional codes to make data resistant to various channel fading. For the Turbo code, an efficient interleaver and rate matching function are designed for the resource block structure of the LTE system.

In terms of Multiple Input Multiple Output (MIMO for short), MIMO technology can also improve the coverage performance and capacity performance of the LTE system through space diversity, space multiplexing and beamforming technology, especially the collaboration developed based on MIMO technology Coordinated Multiple Point (CoMP for short) technology. However, due to the current network and the future period of time, the terminal (User Equipment, referred to as UE) is a single-antenna transmission, MIMO technology and CoMP technology for the improvement of the uplink is limited, only through the joint reception of the receiving end (Joint Receiver, referred to as JR )Improved.

Although there are many technologies in the LTE system that can improve the transmission performance of the system, especially the network coverage performance, it has been confirmed through network testing and software simulation that PUSCH at medium rates, PDSCH at high rates, and VoIP services are still among the channels in the LTE system. Channels with limited coverage. The main reason is that the medium-rate PUSCH and VoIP are limited due to the limited transmit power of the UE, and the high-rate PDSCH is limited due to the ICI between base stations. For this reason, the LTE system introduces a Transmission Time Interval (TTI for short) bundling (Bundling) technology. TTI Bundling technology forms different redundant versions of the entire data packet through channel coding, and different redundant versions are transmitted in consecutive TTIs. TTI Bundling technology obtains coding gain and diversity gain by occupying more transmission resources to obtain Higher received energy and link signal-to-noise ratio, thereby improving the coverage of the LTE system.

For example, Figure 1 is a schematic diagram of TTI Bundling transmission, and the transmitted service is voice (VoIP) as an example. The UE's first VoIP packet is transmitted for the first time in 4 consecutive transmission time intervals of the physical uplink shared channel PUSCH. The 4 consecutive TTIs are called a TTI Bundling with a TTI Bundling Size of 4 , the control information (for example, resource location, etc.) transmitted by TTI Bundling is indicated by the downlink control channel PDCCH in the TTI corresponding to the first TTI in TTI Bundling. Acknowledgment/Non-Acknowledge (Acknowledge/Non-Acknowledge, abbreviated ACK/NACK) response information, if the corresponding response is a negative NACK response, the UE performs 2 TTI Bundling transmissions after 16 TTIs (that is, the first retransmission of the TTI Bundling), the HARQ mechanism and the principle of the first transmission same. By analogy, until the corresponding response is a positive ACK response, or the maximum allowed number of transmission attempts (for example, 3 times) is reached, the transmission of the first VoIP packet is terminated. Similarly, the transmission principle of the nth VoIP packet is the same as that of the first VoIP packet, and will not be repeated here. When the round-trip (Round Transmission Time, RTT) is 16ms, when each VoIP packet is transmitted three times in the TTI Bundling mode with TTI Bundling Size=4, the delay is 36ms, and the delay is 52ms for four transmissions, as shown in Figure 2 for example . VoIP is a delay-sensitive real-time service, and the air interface delay is generally less than 50ms. Therefore, according to the end-to-end delay requirements and system characteristics, the scheduler determines whether the actual number of HARQ transmissions is 3 or 4.

For the existing TTI Bundling, the maximum number of HARQ versions that can be sent is 12 or 16, the corresponding transmission delay is 36ms or 52ms, and the arrival interval of VoIP is 20ms, so theoretically there is still room for enhancement. For example, the TTI BundlingSize is 4, the maximum number of HARQ is 5, the RTT is 8ms or 12ms, and the corresponding transmission delay is 36ms and 52ms, but 20 HARQ versions can be sent to achieve more energy accumulation. Or, if the TTI Bundling Size is 5, the maximum number of HARQ times is 4, the RTT is 15ms, and the corresponding transmission delay is 50ms, 20 HARQ versions can also be sent to achieve more energy accumulation. However, these enhancement schemes all have a shortcoming, that is, changing the RTT, that is, changing the timing of HARQ, which has a great impact on the existing system and cannot be forward compatible.

Aiming at the problem that TTI Bundling enhanced transmission cannot achieve backward compatibility in related technologies, no effective solution has been proposed yet.

Contents of the invention

Aiming at the problem that TTI Bundling enhanced transmission cannot achieve backward compatibility, the present invention provides a data transmission method and device to at least solve this problem.

According to one aspect of the present invention, a data transmission method is provided, including: determining a first time-frequency resource occupied when transmitting data in a TTI Bundling enhanced transmission mode, wherein the first time-frequency resource is at least Including the second time-frequency resource occupied when the data is transmitted in the TTI Bundling transmission mode, and the round-trip RTT of the TTIBundling enhanced transmission is less than or equal to the RTT of the TTI Bundling transmission; in the first time-frequency resource Send data through TTI Bundling enhanced transmission mode.

Preferably, the RTT refers to the time domain interval in which two consecutive transmission time intervals are bundled into a TTI Bundle.

Preferably, the time domain position of the physical hybrid automatic retransmission indicator channel PHICH in the TTI Bundling enhanced transmission mode is the same as the time domain position of the PHICH in the TTI Bundling transmission mode.

Preferably, the time domain position of the physical downlink control channel PDCCH in the TTI Bundling enhanced transmission mode is the same as the time domain position of the PDCCH in the TTI Bundling transmission mode.

Preferably, the TTI Bundling transmission mode occupies 12 or 16 TTIs when the data transmission reaches the maximum number of transmissions, and the TTI Bundling enhanced transmission mode occupies 20 TTIs when the data transmission reaches the maximum number of transmissions.

Preferably, the time domain positions of 12 or 16 TTIs among the 20 TTIs occupied by the TTI Bundling enhanced transmission mode are the same as the time domain positions of the 12 or 16 TTIs occupied by the TTI Bundling transmission mode.

Preferably, the transmission times corresponding to the 12 and 16 TTIs occupied by the TTI Bundling transmission mode are 3 and 4 respectively, and the transmission times corresponding to the 20 TTIs occupied by the TTI Bundling enhanced transmission mode are 4.

Preferably, when the number of transmissions corresponding to the 20 TTIs occupied by the TTI Bundling enhanced transmission mode is 4, the TTI Bundle size of the first, second, and third transmissions is 4 TTIs, and the TTI Bundle size of the fourth transmission The TTI Bundle is two TTI Bundles with a length of 4 TTIs, or a TTI Bundle with a length of 8 TTIs.

Preferably, the TTI Bundle of the fourth transmission corresponds to 1 PHICH, or corresponds to 0 PHICH.

Preferably, the TTI Bundle of the fourth transmission corresponds to 0, 1 or 2 PDCCH channels.

Preferably, when the TTI Bundle transmitted for the fourth time corresponds to 0 PDCCH channels, the scheduling information of the TTI Bundle transmitted for the fourth time corresponds to the first, second, or third transmission PDCCH indication; when the TTI Bundle of the fourth transmission corresponds to 1 PDCCH channel, the scheduling information of the first 4 TTIs of the 8 TTIs in the fourth transmission is passed for the first time, the second time, or this The PDCCH indication corresponding to the third transmission, the scheduling information of the last 4 TTIs of the 8 TTIs is indicated by the PDCCH corresponding to the last 4 TTIs, or the PDCCH indication corresponding to the last 8 TTIs; when the fourth transmission When the TTI Bundle corresponds to 2 PDCCH channels, the scheduling information of the first 4 TTIs in the 8 TTIs in the fourth transmission is indicated by the PDCCH corresponding to the first 4 TTIs, and the last four of the 8 TTIs TTI scheduling information is indicated through the PDCCH corresponding to the last 4 TTIs.

Preferably, the length of the TTI Bundle in the TTI Bundling enhanced transmission mode is 4 or 8, and the length of the TTI Bundle in the TTI Bundling transmission mode is 4.

Preferably, the RTT of the TTI Bundling transmission mode is 16ms, the RTT of the last two TTI Bundles in the TTI Bundling enhanced transmission mode is 12ms, and the RTT between other TTI Bundles is 16ms.

According to another aspect of the present invention, a data transmission device is provided, including: a determining module, configured to determine the first time-frequency resource occupied when transmitting data in a transmission time interval bundled TTI Bundling enhanced transmission mode, wherein the The first time-frequency resource includes at least the second time-frequency resource occupied when the data is transmitted using the TTI Bundling transmission mode, and the round-trip RTT of the TTI Bundling enhanced transmission mode is less than or equal to the RTT of the TTI Bundling transmission mode ; A transmission module, configured to send data in the TTI Bundling enhanced transmission mode on the first time-frequency resource.

Preferably, the time domain position of the Physical Hybrid Automatic Repeat Request Indicator Channel PHICH in the TTI Bundling enhanced transmission is the same as the time domain position of the TTI Bundling transmission.

Preferably, the scheduling information of the multiple TTIs added in the TTI Bundling enhanced transmission compared with the TTI Bundling transmission is the same as the scheduling information of the TTI Bundling transmission or indicated through a new physical downlink control channel PDCCH.

Preferably, the TTI Bundling transmission mode occupies 12 or 16 TTIs when data transmission reaches the maximum number of transmissions, and the TTI Bundling enhanced transmission mode occupies 20 TTIs when data transmission reaches the maximum number of transmissions.

Preferably, the length of the TTI Bundle in the TTI Bundling enhanced transmission mode is 4 or 8, and the length of the TTI Bundle in the TTI Bundling transmission mode is 4.

Preferably, the RTT of the TTI Bundling transmission mode is 16ms, the RTT of the last two TTI Bundles in the TTI Bundling enhanced transmission mode is 12ms, and the RTT between other TTI Bundles is 16ms.

Through the present invention, the first time-frequency resource for data transmission using TTI Bundling enhanced transmission includes the second time-frequency resource for data transmission through TTI Bundling, which can realize the backward compatibility of TTI Bundling. At the same time, due to TTI Bundling enhanced transmission TTI The RTT between Bundlings is less than or equal to the RTT between TTIBundlings transmitted by the TTI Bundling, which enables more TTI Bundlings to be transmitted within the same time interval, improves the coding gain, and improves the coverage of the system to a certain extent.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a first schematic diagram of time interval bundling transmission according to related technologies;

2 is a flowchart of a data transmission method according to an embodiment of the present invention;

3 is a structural block diagram of a data transmission device according to an embodiment of the present invention;

FIG. 4 is a second schematic diagram of time interval bundling transmission according to an embodiment of the present invention;

FIG. 5 is a first schematic diagram of time interval bundling enhanced transmission according to an embodiment of the present invention;

FIG. 6 is a second schematic diagram of time interval bundling enhanced transmission according to an embodiment of the present invention;

FIG. 7 is a third schematic diagram of time interval bundling enhanced transmission according to an embodiment of the present invention;

FIG. 8 is a fourth schematic diagram of time interval bundling enhanced transmission according to an embodiment of the present invention;

FIG. 9 is a fifth schematic diagram of time interval bundling enhanced transmission according to an embodiment of the present invention; and

FIG. 10 is a sixth schematic diagram of time interval bundling enhanced transmission according to an embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

This embodiment provides a data transmission method. FIG. 2 is a flow chart of the data transmission method according to an embodiment of the present invention, including the following steps S202 to S204.

Step S202: Determine the first time-frequency resource occupied when the TTI Bundling enhanced transmission method is used to transmit data, wherein the first time-frequency resource includes at least the second time-frequency resource occupied when the data is transmitted using the TTI Bundling transmission method , and the RTT of the TTI Bundling enhanced transmission mode is less than or equal to the RTT of the TTI Bundling transmission mode;

Step S204: Sending data on the first time-frequency resource by means of TTI Bundling enhanced transmission.

Through the above steps, the first time-frequency resource for TTI Bundling-enhanced transmission of data includes the second time-frequency resource for the data (if) transmitted through TTI Bundling, which can achieve backward compatibility of TTI Bundling. At the same time, due to TTI Bundling enhanced transmission TTI The RTT between Bundlings is less than or equal to the RTT between TTIBundlings transmitted by this TTI Bundling, which can make it possible to transmit more TTI Bundlings within the same time interval, improve the coding gain, and improve the coverage of the system to a certain extent .

The so-called backward compatibility includes: a sender can use TTI Bundling enhanced transmission mode or TTIBundling transmission mode, if TTI Bundling enhanced transmission mode is used to send data, the sender confirms that part of the time-frequency resources of TTI Bundling enhanced transmission mode must be consistent with If the time-frequency resources occupied by the TTI Bundling transmission mode are the same, at least the positions in the time domain are the same, so as to ensure that the sending end can adopt the same strategy, for example, the sending strategy for PDCCH and PHICH. The receiving end is similar to the sending end when receiving, and details are not repeated here.

In this embodiment, RTT refers to the time domain interval in which two consecutive transmission time intervals are bundled with a TTIBundle.

During implementation, in order to improve the backward compatibility of data transmission, the time domain position of the PHICH in TTI Bundling enhanced transmission is identical with the time domain position of this TTI Bundling transmission, in this preferred embodiment, the timing of the PHICH of TTI Bundling enhanced transmission The mechanism is the same as the timing mechanism of TTI Bundling, while reducing the complexity of configuration.

In order to improve scheduling consistency, the time domain position of the PDCCH in the TTI Bundling enhanced transmission mode is the same as the time domain position of the PDCCH in the TTIBundling transmission mode.

As a better implementation mode, the TTI Bundling transmission mode occupies 12 or 16 TTIs when the data transmission reaches the maximum number of transmissions, and the TTI Bundling enhanced transmission mode occupies 20 TTIs when the data transmission reaches the maximum transmission times.

In order to achieve backward compatibility and reduce the complexity of configuration, the time domain positions of 12 or 16 TTIs among the 20 TTIs occupied by TTI Bundling enhanced transmission mode are the same as the time domain positions of 12 or 16 TTIs occupied by TTI Bundling transmission mode same location.

Preferably, the transmission times corresponding to 12 and 16 TTIs occupied by the TTI Bundling transmission mode are 3 and 4 respectively, and the transmission times corresponding to the 20 TTIs occupied by the TTIBundling enhanced transmission mode are 4. When the number of transmissions corresponding to 20 TTIs occupied by the TTI Bundling enhanced transmission mode is 4, the TTI Bundle size for the first, second, and third transmissions is 4 TTIs, and the TTI Bundle size for the fourth transmission is two TTIs. A TTI Bundle with a length of 4 TTIs, or a TTI Bundle with a length of 8 TTIs. In order to realize the flexibility of the timing mechanism, the TTI Bundle of the fourth transmission corresponds to one PHICH or corresponds to 0 PHICH.

Preferably, the TTI Bundle of the fourth transmission corresponds to 0, 1 or 2 PDCCH channels.

Corresponding to the three situations of the TTI Bundle of the fourth transmission above, different scheduling methods can be used to indicate:

For example: when the TTI Bundle transmitted for the fourth time corresponds to 0 PDCCH channels, the scheduling information of the TTI Bundle transmitted for the fourth time is indicated by the PDCCH corresponding to the first, second, or third transmission.

When the TTI Bundle of the fourth transmission corresponds to a PDCCH channel, the scheduling information of the first 4 TTIs of the 8 TTIs in the fourth transmission corresponds to the first, second, or third transmission Indicated by the PDCCH, the scheduling information of the last 4 TTIs of the 8 TTIs is indicated by the PDCCH corresponding to the last 4 TTIs, or indicated by the PDCCH corresponding to the last 8 TTIs.

When the TTI Bundle of the fourth transmission corresponds to 2 PDCCH channels, the scheduling information of the first 4 TTIs in the 8 TTIs in the fourth transmission is indicated by the PDCCH corresponding to the first 4 TTIs, and the 8 TTIs The scheduling information of the last four TTIs in the TTI is indicated by the PDCCH corresponding to the last four TTIs.

In order to achieve system compatibility, the length of TTI Bundle in TTI Bundling enhanced transmission mode is 4 or 8, and the Bundling Size of TTI Bundling transmission is 4. It should be noted that with the development of different communication protocols, the TTI Bundling enhanced transmission and the Bundling Size of the TTI Bundling transmission can be changed according to the protocol.

Preferably, the RTT of the TTI Bundling transmission mode is 16ms, the RTT of the last two TTI Bundles in the TTI Bundling enhanced transmission mode is 12ms, and the RTT between other TTI Bundles is 16ms. This preferred embodiment implements multiple TTI Bundling transmissions at the same time interval.

It should be noted that the steps shown in the flowcharts of the accompanying drawings may be performed in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here.

In another embodiment, a data transmission software is also provided, and the software is used to implement the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, there is also provided a storage medium in which the above data transmission software is stored, and the storage medium includes but not limited to: optical discs, floppy disks, hard disks, rewritable memories, and the like.

The embodiment of the present invention also provides a data transmission device, the data transmission device can be used to implement the above data transmission method and the preferred implementation mode, which has already been explained and will not be described in detail, and the data transmission device involved in the following modules are described. As used below, the term "module" may be a combination of software and/or hardware that realizes a predetermined function. Although the systems and methods described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

Fig. 3 is a structural block diagram of a data transmission device according to an embodiment of the present invention, the device includes: a determination module 32 and a transmission module 34, and the above structure will be described in detail below.

The determination module 32 is used to determine the first time-frequency resource occupied when the transmission time interval is bundled with the TTI Bundling enhanced transmission mode to transmit data, wherein the first time-frequency resource at least includes the time-frequency resource used when the data is transmitted using the TTI Bundling transmission mode The second time-frequency resource occupied, and the round-trip (RTT) of the TTI Bundling enhanced transmission mode is less than or equal to the RTT of the TTI Bundling transmission mode; the transmission module 34 is connected to the determination module 32, and is used for the first time determined in the determination module 32 Data is sent on time-frequency resources through TTI Bundling enhanced transmission.

In this embodiment, RTT refers to the time domain interval in which two consecutive transmission time intervals are bundled into a TTI Bundle.

During implementation, in order to improve the backward compatibility of data transmission, the time domain position of the PHICH in TTI Bundling enhanced transmission is identical with the time domain position of this TTI Bundling transmission, in this preferred embodiment, the timing of the PHICH of TTI Bundling enhanced transmission The mechanism is the same as the timing mechanism of TTI Bundling, while reducing the complexity of configuration.

In order to improve scheduling consistency, the time domain position of the PDCCH in the TTI Bundling enhanced transmission mode is the same as the time domain position of the PDCCH in the TTIBundling transmission mode.

As a better implementation mode, the TTI Bundling transmission mode occupies 12 or 16 TTIs when the data transmission reaches the maximum number of transmissions, and the TTI Bundling enhanced transmission mode occupies 20 TTIs when the data transmission reaches the maximum transmission times.

In order to achieve backward compatibility and reduce the complexity of configuration, the time domain positions of 12 or 16 TTIs among the 20 TTIs occupied by TTI Bundling enhanced transmission mode are the same as the time domain positions of 12 or 16 TTIs occupied by TTI Bundling transmission mode same location.

Preferably, the transmission times corresponding to 12 and 16 TTIs occupied by the TTI Bundling transmission mode are 3 and 4 respectively, and the transmission times corresponding to the 20 TTIs occupied by the TTIBundling enhanced transmission mode are 4. When the number of transmissions corresponding to 20 TTIs occupied by the TTI Bundling enhanced transmission mode is 4, the TTI Bundle size for the first, second, and third transmissions is 4 TTIs, and the TTI Bundle size for the fourth transmission is two TTIs. A TTI Bundle with a length of 4 TTIs, or a TTI Bundle with a length of 8 TTIs. In order to realize the flexibility of the timing mechanism, the TTI Bundle of the fourth transmission corresponds to one PHICH or corresponds to 0 PHICH.

Preferably, the TTI Bundle of the fourth transmission corresponds to 0, 1 or 2 PDCCH channels.

Corresponding to the three situations of the TTI Bundle of the fourth transmission above, different scheduling methods can be used to indicate:

For example: when the TTI Bundle transmitted for the fourth time corresponds to 0 PDCCH channels, the scheduling information of the TTI Bundle transmitted for the fourth time is indicated by the PDCCH corresponding to the first, second, or third transmission.

When the TTI Bundle of the fourth transmission corresponds to a PDCCH channel, the scheduling information of the first 4 TTIs of the 8 TTIs in the fourth transmission corresponds to the first, second, or third transmission Indicated by the PDCCH, the scheduling information of the last 4 TTIs of the 8 TTIs is indicated by the PDCCH corresponding to the last 4 TTIs, or indicated by the PDCCH corresponding to the last 8 TTIs.

When the TTI Bundle of the fourth transmission corresponds to 2 PDCCH channels, the scheduling information of the first 4 TTIs in the 8 TTIs in the fourth transmission is indicated by the PDCCH corresponding to the first 4 TTIs, and the 8 TTIs The scheduling information of the last four TTIs in the TTI is indicated by the PDCCH corresponding to the last four TTIs.

In order to achieve system compatibility, the length of TTI Bundle in TTI Bundling enhanced transmission mode is 4 or 8, and the Bundling Size of TTI Bundling transmission is 4. It should be noted that with the development of different communication protocols, the TTI Bundling enhanced transmission and the Bundling Size of the TTI Bundling transmission can be changed according to the protocol.

Preferably, the RTT of the TTI Bundling transmission mode is 16ms, the RTT of the last two TTI Bundles in the TTI Bundling enhanced transmission mode is 12ms, and the RTT between other TTI Bundles is 16ms. This preferred embodiment implements multiple TTI Bundling transmissions at the same time interval.

The following will be described in combination with preferred embodiments, and the following preferred embodiments combine the above-mentioned embodiments and preferred implementation modes.

Preferred embodiment one

This preferred embodiment provides a backward compatible TTI Bundling enhanced transmission method, and the communication system supports TTIBundling transmission and TTI Bundling enhanced transmission. The method includes: the time-frequency resources occupied by TTI Bundling enhanced transmission completely include the time-frequency resources occupied by TTI Bundling transmission.

In this preferred embodiment, as a preferred embodiment, the number of TTIs occupied by TTI Bundling transmission is M, M is 12 or 16, the number of TTIs occupied by TTI Bundling enhanced transmission is 20, and the number of TTIs occupied by Bundling enhanced transmission is 20. The time domain positions of the M TTIs in are the same as the M TTIs occupied by the TTI Bundling transmission.

During implementation, in order to enhance the flexibility of scheduling, the scheduling information of the 20-M TTIs added in TTI Bundling enhanced transmission is the same as that of the remaining M, or indicated through a new PDCCH.

In order to achieve backward compatibility, the time domain position of the PHICH in TTI Bundling enhanced transmission is the same as that of TTI Bundling's PHICH. That is, the timing mechanism of the PHICH in TTI Bundling enhanced transmission is the same as that of TTI Bundling.

As a better implementation, the Bundling Size of TTI Bundling enhanced transmission is 4, and the RTT between any two TTI Bundlings is 16ms except the RTT between the last two TTI Bundlings is 12ms.

Preferred embodiment two

This embodiment provides a TTI Bundling enhanced transmission method. In this embodiment, multiple TTIs in time interval bundling may not always be continuous.

In Figure 1, the Bundling Size of TTI Bundling enhanced transmission is 4, and the RTT between TTI Bundlings is 16ms. Considering that the VoIP air interface delay does not exceed 50ms, three HARQ transmissions are performed and 12 HARQ versions are transmitted. In order to further enhance the transmission performance, 20 HARQ versions are transmitted in Fig. 5 .

The method of this preferred embodiment includes: the first three TTI Bundling transmissions are exactly the same as those in Figure 1, the Bundling Size of the enhanced transmission is 4, the RTT between TTI Bundlings is 16ms, and the PHICH and PDCCH fed back by HARQ are exactly the same as 1, the difference is Added the 4th TTI Bundling transmission, RTT is 12ms. Information such as the frequency domain position and resource quantity of the fourth TTI Bundling transmission can be the same as any of the previous three times.

Preferably, the fourth TTI Bundling transmission is used as the last transmission, and the PHICH may not be sent. For the receiving end that supports TTI Bundling enhanced transmission and has enabled TTI Bundling enhanced transmission, it only needs to receive according to the above rules.

Preferred Embodiment Three

This embodiment provides a TTI Bundling enhanced transmission method. In this embodiment, multiple TTIs in time interval bundling may not always be continuous.

The difference between this preferred embodiment and the second preferred embodiment is that the scheduling information of the added 4th TTI Bundling transmission is indicated by a new PDCCH. Among them, in Figure 6, the time domain position of the PDCCH is the same as the time domain position of the PDCCH that needs to be sent at RTT=16, and the compatibility is better; in Figure 7, the time domain position of the PDCCH is the same as the time domain position of the PDCCH that needs to be sent at RTT=12 same.

Preferred Embodiment Four

This preferred embodiment provides a TTI Bundling enhanced transmission method. The method of this preferred embodiment will be described below with reference to FIG. 4 and FIG. 8 .

In Figure 4, the Bundling Size of TTI Bundling enhanced transmission is 4, and the RTT between TTI Bundling is 16ms. If the air interface delay of VoIP is relaxed to 52ms, 4 HARQ transmissions are performed, and 16 HARQ versions are transmitted. In order to further enhance the transmission performance, 20 HARQ versions are transmitted in Fig. 5 .

The method in this preferred embodiment includes: retaining the four TTI Bundling transmissions in Figure 4, and sending the PDCCH and PHICH the same. However, the TTI Bundling enhanced transmission sends another TTI Bundling with a BundlingSize of 4 before the fourth TTI Bundling transmission. Information such as the frequency domain position and resource quantity transmitted by the added TTI Bundling can be the same as any of the previous three times.

Preferably, the fourth TTI Bundling transmission is used as the last transmission, and the PHICH may not be sent, or one PHICH is shared with the fourth TTI Bundling transmission. For the receiving end that supports TTI Bundling enhanced transmission and has enabled TTIBundling enhanced transmission, it only needs to receive according to the above rules.

Preferred Embodiment Five

This preferred embodiment provides a TTI Bundling enhanced transmission method. The method of this preferred embodiment will be described below with reference to FIG. 9 and FIG. 10 .

The difference between this preferred embodiment and the fourth preferred embodiment is that information such as frequency domain position and resource quantity of the increased TTI Bundling transmission is indicated by a new PDCCH. Among them, in Figure 9, the time domain position of the PDCCH is the same as the time domain position of the PDCCH that needs to be sent at RTT=12, and the added TTI Bundling transmission shares the same PDCCH with the fourth Bundling transmission, saving more overhead. In FIG. 10 , the time domain position of the PDCCH is the same as the time domain position of the PDCCH that needs to be transmitted at RTT=12.

It should be noted that the numerals in the drawings of the preferred embodiments above identify different TTIs in the TTI Bundle and the control information corresponding to the TTIs.

Preferably, the sending end in this preferred embodiment may be equipment such as a base station, a home base station, and a relay station, or may be a communication terminal, a notebook computer, a handheld computer, and the like. Similarly, the receiving end is used to receive the data signal from the sending end, and the receiving end can be a terminal device such as a mobile phone, a notebook computer, a handheld computer, or a control device such as a base station or a relay station.

Through the above embodiments, a data transmission method and device are provided, which realizes the backward compatibility of data TTI Bundling, improves the coding gain of data transmission, and improves the coverage capability of the system to a certain extent. It should be noted that these technical effects are not possessed by all the above-mentioned implementation manners, and some technical effects can only be obtained by certain preferred implementation manners.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by computing devices, so that they can be stored in storage devices and executed by computing devices, or they can be made into individual integrated circuit modules, or their Multiple modules or steps are implemented as a single integrated circuit module. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the 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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