WO2017194027A1

WO2017194027A1 - Information transmission method and device, and computer storage medium

Info

Publication number: WO2017194027A1
Application number: PCT/CN2017/084333
Authority: WO
Inventors: 张雯; 夏树强; 石靖; 韩祥辉; 梁春丽; 左志松
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-13
Filing date: 2017-05-15
Publication date: 2017-11-16
Also published as: CN107371253A

Abstract

Disclosed in the present disclosure are an information transmission method and device, and computer storage medium. The method comprises: transmitting, according to a predetermined mode and/or a mode instructed by a base station, information within an assigned transmission time interval (TTI); transmitting, on the basis of a DMRS, information within the assigned TTI; and transmitting, on the basis of a CRS, information within a portion of or all TTIs excluding the assigned TTI.

Description

Method and device for transmitting information, computer storage medium

Cross-reference to related applications

The present application is filed on the basis of the Chinese Patent Application No. PCT Application No.

Technical field

The present disclosure relates to transmission information technologies in the field of wireless communication, and in particular, to a method and apparatus for transmitting information, and a computer storage medium.

Background technique

The rapid development of the mobile Internet and the Internet of Things has led to explosive growth in data traffic and the emergence of diversified and differentiated services. As a new generation of mobile communication technology, 5G will support higher speed (Gbps), massive link (1M/Km2), ultra-low latency (1ms), higher reliability, and 100 times energy efficiency improvement. Support new changes in demand. Among them, ultra-low latency is a key indicator of 5G technology, which directly affects the development of time-limited services such as car networking, industrial automation, remote control, and smart grid. A series of current standards for 5G delay reduction are gradually being advanced.

Transmission Time Interval (TTI) is an important research direction for reducing the current delay. It aims to reduce the current TMS length of 1ms to 0.5ms or even 1-2 orthogonal frequency division multiplexing (OFDM, Orthogonal Frequency Division). Multiplexing) The length of the symbol is reduced by a minimum of the minimum scheduling time, and the single transmission delay can be reduced by multiple times without changing the frame structure. In the short TTI technology, a multicast broadcast single frequency network (MBSFN) subframe or uplink (UL, Up Link) The presence of a subframe may cause a short TTI terminal (UE, User Equipment) configured with a Cell Reference Signal (CRS) transmission mode to transmit data on these subframes, thereby increasing the delay of the UE. There is currently no effective solution for this.

Summary of the invention

To solve the above technical problem, an embodiment of the present disclosure provides a method and apparatus for transmitting information, and a computer storage medium.

The method for transmitting information provided by the embodiment of the present disclosure includes:

Within the designated TTI, information is transmitted in a manner that is preset and/or indicated by the base station.

In an embodiment of the present disclosure, the specified TTI satisfies at least one of the following:

The designated TTI is within an MBSFN subframe;

The previous adjacent subframe of the subframe in which the specified TTI is located is an uplink subframe, or an MBSFN subframe, or a special subframe configured to be configured;

The designated TTI is notified by the base station.

In an embodiment of the disclosure, the method further includes at least one of the following:

Transmitting information based on a Demodulation Reference Signal (DMRS) in the specified TTI;

Information is transmitted based on the CRS in some or all of the TTIs outside the specified TTI.

In an embodiment of the disclosure, the method further includes:

If the CRS-based transmission mode is configured, the DDRS-based transmission mode is indicated by using the Downlink Control Information (DCI) format to indicate that the Physical Downlink Shared Channel (PDSCH) is used in the specified TTI. transmit information.

In the embodiment of the present disclosure, the specified DCI format is DCI format 1A.

In the embodiment of the present disclosure, the DMRS-based transmission information is: performing single-port DMRS transmission information, or performing spatial diversity transmission information based on a two-port DMRS, where The port is preset or configured by the base station.

In the embodiment of the present disclosure, for the PDSCH, the transmission mode corresponding to the DMRS-based transmission or the transmission mode corresponding to the CRS-based transmission is preset or configured by a base station.

In the embodiment of the present disclosure, for the PDSCH, the transmission mode corresponding to the DMRS-based transmission is determined by the transmission mode corresponding to the CRS-based transmission.

In the embodiment of the present disclosure, for the PDSCH, the transmission mode corresponding to the DMRS transmission is: one of TM7, TM8, TM9, and TM10; the transmission mode corresponding to the CRS transmission is: TM1, TM2, TM3, TM4, One of TM5, TM6.

In the embodiment of the present disclosure, if the CRS transmission mode is one of TM1, TM2, TM3, TM4, TM5, and TM6, the transmission mode corresponding to the DMRS transmission is TM9 or TM10.

In the embodiment of the present disclosure, in the specified TTI, the CRS port used for transmitting the information is preset or notified by the base station.

In the embodiment of the present disclosure, in the specified TTI, the information is transmitted by using the first designated antenna port, or the information is transmitted by using the second designated antenna port;

The first designated antenna port is a CRS antenna port used by the base station to transmit all CRS antenna ports, or a CRS antenna port used by the base station to transmit a physical broadcast channel (PBCH); the second designated antenna port includes a CRS antenna. The port is a partial port of the CRS antenna port included in the first designated antenna port.

In the embodiment of the present disclosure, the second designated antenna port is all CRS antenna ports included in the specified TTI.

In an embodiment of the disclosure, the method further includes:

Within the specified TTI, the CRS port used for transmitting information is determined by at least one of the following:

a time interval between a CRS of the third designated antenna port before the TTI and the TTI;

Specifying a location of the TTI;

The third designated antenna port belongs to all or part of the antenna ports of the first designated antenna port except the second designated antenna port.

In an embodiment of the disclosure, the method further includes:

If the first designated antenna port is 4 CRS antenna ports, the second designated antenna port is 2 CRS antenna ports;

If the first designated antenna port is 2 CRS antenna ports, the second designated antenna port is 1 CRS antenna port.

In an embodiment of the disclosure, the method further includes:

If the first designated antenna port is

CRS antenna port

0, 1, 2, 3, the second designated antenna port is

CRS antenna port

0 and 1, or 2 and 3;

If the first designated antenna port is

CRS antenna port

0, 1, the second designated antenna port is

CRS antenna port

0 or 1;

If the first designated antenna port is a

CRS antenna port

2, 3, the second designated antenna port is a

CRS antenna port

2 or 3.

In the embodiment of the present disclosure, the information is punctured and transmitted in the MBSFN resource area on the MBSFN subframe of the MBMS (Multimedia Broadcast Multicast Service).

In the embodiment of the present disclosure, on the MBSFN subframe, for the downlink control information and/or the downlink data information based on the CRS transmission, the CRS is sent in the frequency domain resource corresponding to the downlink control information and/or the downlink data information.

In the embodiment of the present disclosure, the symbol for sending the CRS meets one of the following:

All symbols in the symbol are within the TTI;

a partial symbol in the symbol is in the TTI, and other symbols in the symbol except the partial symbol are in a subframe in which the TTI is located;

All of the symbols are within the subframe in which the TTI is located and are outside the TTI.

In an embodiment of the disclosure, the method further includes:

In the specified TTI, based on the CRS transmission information, the information is downlink control information or downlink data information.

In the embodiment of the disclosure, the specified TTI is the first TTI in the subframe or the first TTI in the time slot; the subframe or the time slot is a subframe or a time slot in the LTE system;

The first TTI in the subframe is a TTI in which the start symbol is the first symbol of the subframe; the first TTI in the slot is the start symbol is the first of the slots The TTI of a symbol, or, refers to the TTI that contains the first symbol in the time slot.

The device for transmitting information provided by the embodiment of the present disclosure includes:

Specify a unit configured to specify a TTI;

The transmission unit is configured to transmit information in a specified TTI according to a preset and/or a manner indicated by the base station.

The designated TTI is within an MBSFN subframe;

The designated TTI is notified by the base station.

In an embodiment of the disclosure, the transmitting unit is further configured to perform at least one of the following:

Transmitting information based on the DMRS within the specified TTI;

In an embodiment of the present disclosure, the apparatus further includes: a characterization unit configured to: when the CRS-based transmission mode is configured, use the specified DCI format scheduling to indicate that the PDSCH uses the DMRS-based transmission mode to transmit information in the specified TTI.

In the embodiment of the disclosure, the DMRS based transmission information is: a single port based DMRS The information is transmitted, or the spatial diversity transmission information is performed based on the two-port DMRS, wherein the port is configured by a preset or a base station.

In the embodiment of the present disclosure, the transmitting unit is further configured to: use the first designated antenna port to transmit information, or use the second designated antenna port to transmit information in the specified TTI;

The first designated antenna port is all the antenna ports of the CRS transmitted by the base station, or all the CRS antenna ports used by the base station to transmit the PBCH; and the CRS antenna port included in the second designated antenna port is the first designated antenna port. Part of the port that contains the CRS antenna port.

In the embodiment of the present disclosure, the apparatus further includes: a determining unit, configured to determine, by at least one of the following, a CRS port used for transmitting information in the specified TTI:

Specifying a location of the TTI;

In the embodiment of the disclosure, when the first designated antenna port is 4 CRS antenna ports, the second designated antenna port is 2 CRS antenna ports;

When the first designated antenna port is 2 CRS antenna ports, the second designated antenna port is 1 CRS antenna port.

In the embodiment of the present disclosure, when the first designated antenna port is

CRS antenna port

0, 1, 2, 3, the second designated antenna port is

CRS antenna port

0 and 1, or 2 and 3;

If the first designated antenna port is

CRS antenna port

0, 1, the second designated antenna port is

CRS antenna port

0 or 1;

If the first designated antenna port is a

CRS antenna port

2, 3, the second designated antenna port is a

CRS antenna port

2 or 3.

In the embodiment of the present disclosure, the transmitting unit is further configured to perform puncturing and transmitting the information in the MBSFN resource area on the MBSFN subframe that transmits the MBMS service.

All symbols in the symbol are within the TTI;

A computer storage medium provided by an embodiment of the present invention stores a computer program configured to perform a method of transmitting information.

In the technical solution of the embodiment of the present disclosure, for the UE configured with the CRS mode, the information is transmitted in the following manner: Mode 1: For the TM1 to TM6, if the mode 1A scheduling is used, the single antenna port is used, and the port 7 is used for transmission. . Alternatively, in order to perform MU-MIMO between multiple users, the UE may be configured or determined in a preset manner. Manner 2: Configure/preset candidate TMs or TMs for TM1 to TM6. If it is preset, it is TM9. If it is configured, it can be TM8 or TM9. The UE detects the DCI format according to the DMRS mode. Therefore, in the short TTI technology, the short TTI UE configured with the CRS transmission mode performs information transmission on the MBSFN subframe or the uplink subframe, which reduces the delay of the UE.

DRAWINGS

In the drawings, which are not necessarily to scale, the Like reference numerals with different letter suffixes may indicate different examples of similar components. The drawings generally illustrate the various embodiments discussed herein by way of example and not limitation.

FIG. 1 is a schematic flowchart diagram of a method for transmitting information according to an embodiment of the present disclosure;

2 is a schematic structural diagram of an apparatus for transmitting information according to an embodiment of the present disclosure;

3 is a schematic diagram of transmission information according to Embodiment 2 of the present disclosure;

4 is a schematic diagram 1 of transmission information according to Embodiment 3 of the present disclosure;

FIG. 5 is a second schematic diagram of transmission information according to Embodiment 3 of the present disclosure;

FIG. 6 is a third schematic diagram of transmission information according to Embodiment 4 of the present disclosure.

detailed description

In the technical solution of the various embodiments of the present disclosure, for the UE configured with the CRS mode, the information is transmitted in the following manner: Mode 1: For the scheduling of the TM1 to the TM6, if the scheduling is performed by the format 1A, the single antenna port is used, and the port 7 is used. transmission. Alternatively, in order to perform MU-MIMO between multiple users, the UE may be configured or determined in a preset manner. Method 2: For the TM1 to TM6 UE configuration/preset candidate or rollback TM, if it is preset, it is TM9, if it is configured, it can be TM8, TM9. The UE detects the DCI format according to the DMRS mode.

When the base station (eNB) transmits 4 antenna ports, for the TTI containing only two antenna ports, 4 antenna ports are still used for transmission, or only the ports included in the TTI are used for transmission.

When the short TTI service is sent in the subframe where the MBMS service is located, the following method is adopted: Mode 1: Punch transmission on the MBSFN subframe, avoiding the reference signal on the port 4. For CRS-based TM, the CRS is sent in the resource area; the second method is: direct puncturing transmission, and the reference signal on port 4 is destroyed.

Those skilled in the art should understand that the method for transmitting information proposed by the embodiments of the present disclosure is not limited to the short TTI technology.

FIG. 1 is a schematic flowchart of a method for transmitting information according to an embodiment of the present disclosure. As shown in FIG. 1 , the method for transmitting information includes the following steps:

Step 101: Transmit information in a specified TTI according to a preset and/or a manner indicated by the base station.

The designated TTI is within an MBSFN subframe;

The designated TTI is notified by the base station.

Transmitting information based on the DMRS within the specified TTI;

In an embodiment of the disclosure, the method further includes:

If a CRS-based transmission mode is configured, within the specified TTI, the designation is utilized The DCI format scheduling indicates that the PDSCH transmits information using a DMRS-based transmission mode.

In the embodiment of the present disclosure, the DMRS-based transmission information is: a single-port-based DMRS transmission information, or a two-port DMRS based on spatial diversity transmission information, where the port is preset or configured by a base station.

In an embodiment of the disclosure, the method further includes:

Specifying a location of the TTI;

In the embodiment of the disclosure, if the first designated antenna port is 4 CRS antenna ports, the second designated antenna port is 2 CRS antenna ports;

In an embodiment of the disclosure, the method further includes:

If the first designated antenna port is

CRS antenna port

0, 1, 2, 3, the second designated antenna port is

CRS antenna port

0 and 1, or 2 and 3;

If the first designated antenna port is

CRS antenna port

0, 1, the second designated antenna port is

CRS antenna port

0 or 1;

If the first designated antenna port is a

CRS antenna port

2, 3, the second designated antenna port is a

CRS antenna port

2 or 3.

In the embodiment of the present disclosure, the information is punctured in the MBSFN resource area on the MBSFN subframe in which the MBMS service is transmitted.

All symbols in the symbol are within the TTI;

a partial symbol in the symbol is within the TTI, except for the partial symbol in the symbol Other symbols than the number are in the subframe in which the TTI is located;

In an embodiment of the disclosure, the method further includes:

2 is a schematic structural diagram of an apparatus for transmitting information according to an embodiment of the present disclosure. As shown in FIG. 2, the apparatus includes:

The specifying unit 21 is configured to specify a TTI;

The transmitting unit 22 is configured to transmit information in a specified TTI in a manner indicated by a preset and/or a base station.

The designated TTI is within an MBSFN subframe;

The designated TTI is notified by the base station.

In the embodiment of the present disclosure, the transmission unit 22 is further configured to perform at least one of the following:

Transmitting information based on the DMRS within the specified TTI;

In the embodiment of the present disclosure, the apparatus further includes: a characterization unit 23 configured to: if the CRS-based transmission mode is configured, schedule the representation by using the specified DCI format in the specified TTI The PDSCH transmits information using a DMRS-based transmission mode.

In the embodiment of the present disclosure, the transmitting unit 22 is further configured to: use the first designated antenna port to transmit information, or use the second designated antenna port to transmit information in the specified TTI;

In the embodiment of the present disclosure, the device further includes: a determining unit 24, configured to determine, by at least one of the following, a CRS port used for transmitting information in the specified TTI:

Specifying a location of the TTI;

In the embodiment of the present disclosure, if the first designated antenna port is

CRS antenna port

0, 1, 2, 3, the second designated antenna port is

CRS antenna port

0 and 1, or 2 and 3;

If the first designated antenna port is

CRS antenna port

0, 1, the second designated antenna port is

CRS antenna port

0 or 1;

If the first designated antenna port is a

CRS antenna port

2, 3, the second designated antenna port is a

CRS antenna port

2 or 3.

In the embodiment of the present disclosure, the transmitting unit 22 is further configured to perform puncturing and transmitting the information in the MBSFN resource area on the MBSFN subframe that transmits the MBMS service.

All symbols in the symbol are within the TTI;

It should be understood by those skilled in the art that the functions implemented by the respective units in the apparatus for transmitting information can be understood by referring to the steps of the method for transmitting information according to the embodiment of the present invention. The technical solution of the method of transmitting information of the embodiment of the present disclosure can also be used as a supplementary explanation of the device for transmitting information.

In practical applications, the functions implemented by each unit in the device for transmitting information may be implemented by a central processing unit (CPU) or a microprocessor (MPU, Micro Processor Unit) located in a device that transmits information. ), or a digital signal processor (DSP, Digital Signal Processor), or Field Programmable Gate Array (FPGA).

The method for transmitting information in the embodiment of the present disclosure will be described in detail below in conjunction with specific implementation scenarios.

Embodiment 1

This embodiment provides a method of transmitting information. For short TTI transmission, where the short TTI can be a TTI of no more than 7 symbols, the proposed method is not limited to application in a short TTI system.

In this embodiment, the downlink control information and/or the downlink data information are transmitted on the designated TTI. The specified TTI may be a TTI in an MBSFN subframe. For example, an MBSFN subframe includes 12 OFDM symbols, and is divided into 6 TTIs, and each TTI includes 2 OFDM symbols. Here, the TTI is specified as the 6 TTIs. one of the. The actual application is not limited to this division. Alternatively, the previous subframe of the subframe in which the specified TTI is located is an uplink subframe, or an MBSFN subframe, or a special subframe. For example, the subframe #n is an MBSFN subframe, and a partial TTI or all TTIs in the subframe #n+1 are designated TTIs. The method provided in this embodiment is not limited to being applied to the specified TTI, and may be used for all TTIs, or TTIs in odd subframes, or TTIs in even subframes, or notified by an eNB, such as an eNB configuration. TTI in the sub-frame. The actual application is not limited to the above examples.

Optionally, the specified TTI may be a TTI of the special subframe in which the previous subframe of the subframe is configured, for example, the special subframe of the specified configuration may be a special subframe of all configurations, or The special subframes of the specified configuration may be special subframes of configuration #0 and configuration #5. In these two configurations, the downlink has only 3 symbols, the CRS is too small, and the time interval from the TTI is too Far, if the TTI needs to use the CRS of the previous subframe for channel estimation, the channel estimation performance is not good. The actual application is not limited to the above examples.

In LTE, there are 10 transmission modes, which are transmission modes 1 to 10, and can also be written as TM1 to 10. As follows.

Transmission Mode 1 (TM1): Single antenna port transmission.

Transmission Mode 2 (TM2): Transmit Diversity Mode.

Transmission Mode 3 (TM3): Open Loop Space Division Multiplexing Transmission Mode 4 (TM4) for Large Delay Diversity: Closed Loop Spatial Multiplexing.

Transmission Mode 5 (TM5): Multi-user MIMO.

Transmission Mode 6 (TM6): Rank 1 transmission.

Transmission Mode 7 (TM7): Single stream beamforming.

Transmission Mode 8 (TM8): Dual stream beamforming.

Transmission Mode 9 (TM9): Supports up to 8 layers of transmission.

Transmission Mode 10 (TM10): Supports up to 8 layers of transmission (CoMP-enabled transmission mode).

If the eNB configures a CRS-based transmission mode (TM) for the UE, that is, one of the prior art TM1, 2, 3, 4, 5, and 6, the PDSCH of the UE is demodulated by using the CRS, and the UE detects The format of the downlink control information is the DCI format corresponding to the CRS-based transmission mode. For example, in the prior art, if the UE is configured with TM4, two DCI formats, namely DCI format 2 and DCI format 1A, are detected. The DCI format 1A indicates that transmission is performed by using transmit diversity, and the DCI format 2 indicates that transmission is performed by closed-loop spatial multiplexing. Both transmission methods are based on CRS transmission. On the specified TTI above, such as MBSFN On the TTI in the subframe, if the CRS is not transmitted in the MBSFN area, then the PDSCH cannot be transmitted; or if the previous adjacent subframe of the subframe in which the TTI is located is the uplink subframe/MBSFN subframe, due to the previous one If adjacent subframes do not have CRS, then CRS transmission may affect transmission performance.

Therefore, in the present embodiment, a solution is provided in which transmission is performed based on the DMRS within the specified TTI, and transmission is performed based on the CRS in some or all of the TTIs other than the designated TTI.

Optionally, for the UE configured with the CRS mode, the specified DCI format scheduling is used on the specified TTI to indicate that the PDSCH is transmitted according to the DMRS mode. Since each CRS-based transmission mode supports DCI format 1A transmission, it is preferable to use DCI format 1A to instruct the UE to transmit based on the DMRS mode. Preferably, the eNB indicates that the UE transmits in a single-port DMRS mode, and the port is preset, such as

port

7 or 8, or is indicated by the eNB, and may be implemented to enable two UEs to adopt different antenna ports as MU- MIMO.

Or, optionally, for the UE configured with the CRS mode, on the specified TTI, the UE performs transmission by using a preset DMRS-based transmission mode. Each CRS-based transmission mode corresponds to a DMRS-based transmission mode, such as one of TM7, 8, 9, 10. For example, for TM1 and 2, the PMI is not fed back, and can be corresponding to single-layer transmission. It can be rolled back to TM8 and 9 and adopt random precoding. For TM3, feedback RI, no feedback PMI, PMI cannot be obtained, and it can correspond to single layer transmission. Or use a multi-layer transmission with random precoding to fall back to TM8 or 9. For TM4, feedback PMI, up to 4 layers of transmission, can be rolled back to TM9. For TM5 (MU-MIMO), for single layer transmission, feedback PMI, can be rolled back to TM8 or 9, for TM6, for single layer transmission, feedback PMI can be rolled back to TM8 or 9. Alternatively, all CRS-based transmission modes correspond to TM9. On the specified TTI, the UE detects the DCI format corresponding to TM9, and uses TM9 for transmission on the PDSCH.

Or, optionally, the eNB configures the UE with two transmission modes, a DMRS-based transmission mode, and a CRS-based transmission mode, and detects the DMRS-based on the specified TTI. The DCI format corresponding to the transmission mode is transmitted using DMRS. The DCI format corresponding to the CRS-based transmission mode is detected on a part or all TTIs outside the specified TTI, and the CRS is used for transmission. For example, the eNB configures the UE with TM9 and TM4, and transmits the TM4 on the TTI other than the specified TTI. On the specified TTI, the transmission is performed by using the ME9, for example, using a single layer transmission of port 7, or using the same layer number transmission as the TM4, the port is preset, or is configured by the eNB.

Optionally, if the downlink control information is based on CRS transmission, on the specified TTI, the downlink control information is transmitted based on the DMRS, and the adopted antenna port is preset, for example, port 7 is used for single port transmission, or port 7 is adopted. And 9 for spatial diversity transmission, or the adopted antenna port is configured by the eNB, such as configured by RRC signaling.

Embodiment 2

In this embodiment, the definition of the specified TTI is similar to that of the first embodiment.

Within the specified TTI, the number of CRS ports used for transmitting information is preset or configured by the eNB.

Within the specified TTI, when the CRS of the eNB is transmitted on n antenna ports, or when the PBCH transmitted by the eNB is transmitted on n antenna ports, for the TTI including only part of the antenna ports, n antennas may still be used. The port is transmitted. For example, in FIG. 3, the eNB transmits a total of four antenna ports CRS, which are R ₀ , R ₁ , R _{2 ,} and R _{3 , respectively} . There are only two ports in TTI#3, namely

port#

0 and 1. If the transmission mode of the UE is transmit diversity in TTI#3, then four antenna ports are used for transmit diversity, for example, the symbol #0 of the subframe is adopted. The channel estimation of the CRS on the four antenna ports on ～7 is not limited to such an approach. For example, there are only two ports in TTI#4, namely

port#

2 and 3. When using TM4 spatial multiplexing, spatial multiplexing can be performed on four antenna ports.

Or, in the specified TTI, when the CRS of the eNB is sent on the n antenna ports, or when the PBCH sent by the eNB is sent on the n antenna ports, n CRS antennas may be used in the specified TTI. Part of the antenna port in the port is transmitted. Optionally, when the eNB sends the CRSs of the four antenna ports, in the specified TTI, only two antenna ports may be used for transmission, for example, when the eNB sends the

CRS antenna ports

0, 1, 2, and 3, Within the designated TTI,

antenna ports

0 and 1, or 2 and 3, or 0 and 2, or 1 and 3, or 1 and 2, or 0 and 3 are used for transmission.

Optionally, when the eNB sends the CRSs of the four antenna ports, in the specified TTI, only one antenna port may be used for transmission, for example, when the eNB sends the

CRS antenna ports

0, 1, 2, and 3, Within the designated TTI, one of the

antenna ports

0, 1, 2, 3 is used for transmission.

Optionally, when the eNB sends the CRS of the two antenna ports, in the specified TTI, only one antenna port may be used for transmission, for example, when the eNB sends the

CRS antenna port

0, 1, at the specified TTI. The

antenna port

0 or 1 is used for transmission; or when the NB transmits the

CRS antenna ports

2 and 3, the

antenna port

2 or 3 is used for transmission in the specified TTI.

Optionally, only the antenna port of the CRS included in the TTI is used for transmission. For example, in FIG. 3, the eNB sends a total of CRSs of 4 antenna ports, and in TTI#3, only

ports #

0 and 1 are included. CRS, when the transmission mode is transmit diversity,

only port #

0 and 1 are used for transmit diversity; for example, in TTI#4, only CRSs of

port #

2 and 3 are included, when the transmission mode is transmit diversity, Only transmit ports #2 and 3 are used for transmit diversity.

Optionally, the antenna port used for the transmission may be determined according to a symbol corresponding to the antenna port other than the CRS antenna port included in the specified TTI and a time interval of the TTI. Preferably, the antenna port used for transmission is determined by a symbol corresponding to another antenna port closest to the specified TTI before the specified TTI and a time interval of the TTI, where other antenna ports refer to the specified TTI CRS antenna port outside the CRS antenna port. For example, in Figure 3, TTI#3 contains

port#

0 and 1,

port #

2 and 3 closest to TTI#1 before TTI#3 on symbol #1, symbol #1 and TTI#3 are separated by 5 symbols, using port#2 If the transmission is performed with 3, the performance may be degraded. Therefore, on TTI#3,

only port #

0 and 1 can be used for transmission. For example, when the transmission mode is 2,

port #

0 and 1 can be used for transmit diversity. For another example, TTI#2 includes

port#

2 and 3.

Ports #

0 and 1 closest to TTI#1 before TTI#2 are on symbol #7, and symbols #7 and TTI#2 are adjacent, so in TTI On #2, when the transmission mode is 2, four antenna ports can be used for transmit diversity.

Optionally, a threshold value may be defined, and when the time interval between the symbol corresponding to the other antenna port closest to the specified TTI and the TTI before the specified TTI is greater than a threshold, only the designation is used. The antenna port included in the TTI is transmitted. Here, the other antenna ports refer to antenna ports other than the antenna ports included in the specified TTI.

Alternatively, the antenna port used for transmission is determined by the location of the TTI. For example, TTI#1 uses 2 antenna ports, and TTI#2 uses 4 antenna ports.

Alternatively, the eNB informs the UE of the CRS antenna port used, such as 1 bit to indicate whether to use the CRS antenna port in the TTI or the total CRS antenna port. The actual application is not limited to such an indication.

Embodiment 3

This embodiment provides a transmission method on an MBSFN subframe. For short TTI transmission, where the short TTI can be a TTI of no more than 7 symbols, the proposed method is not limited to application in a short TTI system.

On the MBSFN subframe in which the MBMS service is transmitted, in order to reduce the delay of the UE supporting the short TTI, the downlink control information of the UE and the PDSCH are punctured and transmitted in the MBSFN resource region.

When punching, the symbol on the port 4 antenna port can be avoided, or the downlink control information of the UE and the PDSCH can also remove the symbol on the port 4.

For the UE configured with the CRS mode, the downlink control information is in the MBSFN subframe. And transmitting CRS in a frequency domain resource corresponding to the downlink data information. For example, if the frequency domain resources allocated by the eNB to the UE are PRB #0 to 3, the eNB transmits the CRS on the PRBs #0 to 3. The CRS may be transmitted in the specified TTI in the time domain, as shown in FIG. TTI #1 occupies 3 symbols in the MBSFN area, and CRS is transmitted on the first two symbols of the 3 symbols. The number of ports sent by the CRS may be the same as the number of antenna ports sent by the PBCH, or may be only the number of partial antenna ports for transmitting the PBCH. The frequency domain transmission range of the CRS is a frequency domain resource allocated to the UE.

Alternatively, the CRS may also be sent in the MBSFN subframe in the time domain, and the frequency domain transmission range is a frequency domain resource allocated to the UE. Preferably, the CRS may be sent in the manner of extending the CP, as shown in FIG. 5. At this time, in the TTI, the CRS may or may not be included, and the UE may perform channel estimation by using the CRS before the TTI.

Embodiment 4

This embodiment provides a method of transmitting information.

In the LTE system, one subframe is divided into a plurality of TTIs from the first symbol. The method in this embodiment does not limit the method for dividing the TTI. For example, under a normal CP, each subframe contains 14 symbols, and each slot contains 7 symbols. Starting from the first symbol, every two symbols are divided into one TTI, which is divided into seven TTIs. Or, a time slot is divided into three TTIs, and the number of symbols included in each TTI in time series is 2, 2, 3, or 3, 2, 2, 2, 3, and 2. The division method of each subframe may be the same. Differently, the division method of each time slot may be the same or different.

The downlink control information or the downlink data information is transmitted based on the CRS in the first TTI of one subframe or the first TTI of one slot. That is to say, the downlink control information or the downlink data information is demodulated based on the CRS. The subframe here may be a non-MBSFN subframe, or may also be an MBSFN subframe. The first TTI in the subframe here refers to the start symbol being the TTI of the first symbol of the subframe. The first TTI in the time slot refers to a TTI whose first symbol is the first symbol of the time slot, or a TTI that includes the first symbol in the time slot.

As shown in FIG. 6, under a normal CP, each subframe contains 14 symbols, and each slot contains 7 symbols. One time slot is divided into three TTIs, and the number of symbols included in each TTI in time series is 2, 2, and 3, respectively. The first TTI of the subframe is TTI#0, and the first TTI of the second slot is TTI#3. On

TTI#

0 and 3, regardless of the transmission mode configured by the eNB, it is based on CRS demodulation. Downlink control information or downlink data.

Those skilled in the art will appreciate that embodiments of the present disclosure can be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. Instructions are provided for implementation The steps of a function specified in a block or blocks of a flow or a flow and/or a block diagram of a flow chart.

Correspondingly, an embodiment of the present invention further provides a computer storage medium, wherein a computer program is configured, and the computer program is configured to perform the method for transmitting information according to an embodiment of the present invention.

The above description is only for the preferred embodiments of the present disclosure, and is not intended to limit the scope of the disclosure.

Industrial applicability

In the technical solution of the embodiment of the present disclosure, for the UE configured with the CRS mode, the information is transmitted in the following manner: Mode 1: For the scheduling of the ATM 1 to the TM6, if the scheduling is performed by using the format 1A, the port 7 is used for transmission. Alternatively, in order to perform MU-MIMO between multiple users, the UE may be configured or determined in a preset manner. Manner 2: Configure/preset candidate TMs or TMs for TM1 to TM6. If it is preset, it is TM9. If it is configured, it can be TM8 or TM9. The UE detects the DCI format according to the DMRS mode. Therefore, in the short TTI technology, the short TTI UE configured with the CRS transmission mode performs information transmission on the MBSFN subframe or the uplink subframe, which reduces the delay of the UE.

Claims

A method of transmitting information, the method comprising:

The information is transmitted in a manner specified by the preset and/or base station within a specified transmission time interval.
The method of transmitting information according to claim 1, wherein said specified transmission time interval satisfies at least one of the following:

The specified transmission time interval is within a multicast broadcast single frequency network subframe;

The previous adjacent subframe of the subframe in which the specified transmission time interval is located is an uplink subframe, or a multicast broadcast single frequency network subframe, or a special subframe configured to be configured;

The specified transmission time interval is notified by the base station.
The method of transmitting information according to claim 1 or 2, wherein the method further comprises at least one of the following:

Transmitting information based on the demodulation reference signal during the specified transmission time interval;

Information is transmitted based on the cell reference signal during part or all of the transmission time intervals outside the specified transmission time interval.
The method of transmitting information according to claim 1 or 3, wherein the method further comprises:

If the transmission mode based on the cell reference signal is configured, the specified downlink control information format is used to indicate that the physical downlink shared channel uses the transmission mode transmission information based on the demodulation reference signal during the specified transmission time interval.
The method of transmitting information according to claim 4, wherein the specified downlink control information format is downlink control information format 1A.
The method of transmitting information according to claim 3, wherein said demodulating reference signal transmission information is: single port based demodulation reference signal transmission information, or spatial diversity transmission information based on a two port demodulation reference signal Wherein the port is preset or configured by a base station.
The method for transmitting information according to claim 3, wherein, for the physical downlink shared channel, the transmission mode corresponding to the transmission of the demodulation reference signal or the transmission mode corresponding to the transmission of the cell reference signal is preset Or it is configured by the base station.
The method of transmitting information according to claim 7, wherein, for the physical downlink shared channel, the transmission mode corresponding to the transmission of the demodulation reference signal is determined by a transmission mode corresponding to the transmission of the cell reference signal.
The method for transmitting information according to claim 3, wherein, for the physical downlink shared channel, the transmission mode corresponding to the demodulation reference signal transmission is: transmission mode 7, transmission mode 8, transmission mode 9, and transmission mode 10. One of the transmission modes corresponding to the cell reference signal transmission is one of a transmission mode 1, a transmission mode 2, a transmission mode 3, a transmission mode 4, a transmission mode 5, and a transmission mode 6.
The method of transmitting information according to any one of claims 7 to 9, wherein if the cell reference signal transmission mode is a transmission mode 1, a transmission mode 2, a transmission mode 3, a transmission mode 4, a transmission mode 5, and a transmission mode In one of the six, the transmission mode corresponding to the demodulation reference signal transmission is the transmission mode 9 or the transmission mode 10.
The method of transmitting information according to claim 1, wherein the cell reference signal port used for transmitting the information is preset in the specified transmission time interval or is notified by the base station.
The method of transmitting information according to claim 11, wherein the information is transmitted by using the first designated antenna port or the information is transmitted by using the second designated antenna port in the specified transmission time interval;

The first designated antenna port is all the antenna ports of the base station transmitting the cell reference signal, or all the cell reference signal antenna ports used by the base station to transmit the physical broadcast channel; and the cell reference signal antenna port included in the second designated antenna port a partial port of a cell reference signal antenna port included in the first designated antenna port.
The method of transmitting information according to claim 12, wherein

The second designated antenna port is all cell reference signal antenna ports included in the specified transmission time interval.
The method of transmitting information according to any one of claims 11 to 13, wherein the method further comprises:

The cell reference signal port used for transmitting the information in the specified transmission time interval is determined by at least one of the following:

a time interval between the cell reference signal of the third designated antenna port before the specified transmission time interval and the transmission time interval;

Specifying a location of a transmission time interval;

The third designated antenna port belongs to all or part of the antenna ports of the first designated antenna port except the second designated antenna port.
The method of transmitting information according to any one of claims 11 to 13, wherein the method further comprises:

If the first designated antenna port is 4 cell reference signal antenna ports, the second designated antenna port is 2 cell reference signal antenna ports;

If the first designated antenna port is two cell reference signal antenna ports, the second designated antenna port is one cell reference signal antenna port.
The method of transmitting information according to claim 15, wherein the method further comprises:

If the first designated antenna port is a cell reference signal antenna port 0, 1, 2, 3, if the second designated antenna port is a cell reference signal antenna port 0 and 1, or 2 and 3;

If the first designated antenna port is the cell reference signal antenna port 0, 1, the second designated antenna port is the cell reference signal antenna port 0 or 1;

If the first designated antenna port is a cell reference signal antenna port 2, 3, The second designated antenna port is the cell reference signal antenna port 2 or 3.
The method of transmitting information according to claim 1, wherein said information is punctured in a multicast broadcast single frequency network resource region on a multicast broadcast single frequency network subframe in which a multimedia broadcast multicast service is transmitted.
The method for transmitting information according to claim 1, wherein, in the multicast broadcast single frequency network subframe, for the downlink control information and/or the downlink data information based on the cell reference signal transmission, the downlink control information and/or Or transmitting a cell reference signal in a frequency domain resource corresponding to the downlink data information.
The method of transmitting information according to claim 18, wherein the symbol for transmitting the cell reference signal satisfies one of the following:

All symbols in the symbol are within the transmission time interval;

a partial symbol in the symbol is within the transmission time interval, and other symbols in the symbol other than the partial symbol are in a subframe in which the transmission time interval is located;

All of the symbols are within a subframe in which the transmission time interval is located and outside of the transmission time interval.
The method of transmitting information according to claim 1, wherein the method further comprises:

The downlink control information and/or the downlink data information are transmitted based on the cell reference signal during the specified transmission time interval.
A method of transmitting information according to claim 20, wherein

The specified transmission time interval is a first transmission time interval in a subframe or a first transmission time interval in a time slot; the subframe or a time slot is a subframe or a time slot in a long term evolution system;

The first transmission time interval in the subframe refers to a transmission time interval in which the start symbol is the first symbol of the subframe; the first transmission time interval in the time slot refers to an initiator The transmission time interval of the first symbol of the time slot, or the transmission time interval including the first symbol in the time slot.
An apparatus for transmitting information, the apparatus comprising:

Specifies a unit configured to specify a transmission time interval;

The transmission unit is configured to transmit information according to a preset and/or indication by the base station within a specified transmission time interval.
The apparatus for transmitting information according to claim 22, wherein said specified transmission time interval satisfies at least one of the following:

The specified transmission time interval is within a multicast broadcast single frequency network subframe;

The previous adjacent subframe of the subframe in which the specified transmission time interval is located is an uplink subframe, or a multicast broadcast single frequency network subframe, or a special subframe configured to be configured;

The specified transmission time interval is notified by the base station.
The apparatus for transmitting information according to claim 22 or 23, wherein the transmission unit is further configured to perform at least one of the following:

Transmitting information based on the demodulation reference signal during the specified transmission time interval;

Information is transmitted based on the cell reference signal during part or all of the transmission time intervals outside the specified transmission time interval.
The apparatus for transmitting information according to claim 22 or 24, wherein the apparatus further comprises: a characterization unit configured to use the designation within the specified transmission time interval if a transmission mode based on the cell reference signal is configured The downlink control information format scheduling indicates that the physical downlink shared channel transmits information using a transmission mode based on a demodulation reference signal.
The apparatus for transmitting information according to claim 25, wherein the specified downlink control information format is downlink control information format 1A.
The apparatus for transmitting information according to claim 24, wherein said information based on demodulation reference signal transmission is: based on a single port-based demodulation reference signal transmission information, or based on The two-port demodulation reference signal performs spatial diversity transmission information, wherein the port is preset or configured by a base station.
The apparatus for transmitting information according to claim 24, wherein, for the physical downlink shared channel, the transmission mode corresponding to the transmission of the demodulation reference signal or the transmission mode corresponding to the transmission of the cell reference signal is preset Or it is configured by the base station.
The apparatus for transmitting information according to claim 28, wherein, for the physical downlink shared channel, the transmission mode corresponding to the transmission of the demodulation reference signal is determined by a transmission mode corresponding to the transmission of the cell reference signal.
The apparatus for transmitting information according to claim 24, wherein, for the physical downlink shared channel, the transmission mode corresponding to the demodulation reference signal transmission is: transmission mode 7, transmission mode 8, transmission mode 9, and transmission mode 10. One of the transmission modes corresponding to the cell reference signal transmission is one of a transmission mode 1, a transmission mode 2, a transmission mode 3, a transmission mode 4, a transmission mode 5, and a transmission mode 6.
The apparatus for transmitting information according to any one of claims 28 to 30, wherein if the cell reference signal transmission mode is a transmission mode 1, a transmission mode 2, a transmission mode 3, a transmission mode 4, a transmission mode 5, and a transmission mode In one of the six, the transmission mode corresponding to the demodulation reference signal transmission is the transmission mode 9 or the transmission mode 10.
The apparatus for transmitting information according to claim 22, wherein the cell reference signal port used for transmitting the information is preset in the specified transmission time interval or is notified by the base station.
The apparatus for transmitting information according to claim 32, wherein the transmission unit is further configured to transmit information by using a first designated antenna port or to transmit information by using a second designated antenna port in the specified transmission time interval;

The first designated antenna port is all antenna ports of the base station transmitting the cell reference signal, or all the cell reference signal antenna ports used by the base station to transmit the physical broadcast channel; The cell reference signal antenna port included in the second designated antenna port is a partial port of a cell reference signal antenna port included in the first designated antenna port.
The apparatus for transmitting information according to claim 33, wherein said second designated antenna port is all cell reference signal antenna ports included in said designated transmission time interval.
The apparatus for transmitting information according to any one of claims 32 to 34, wherein the apparatus further comprises: a determining unit configured to determine, by at least one of the following, a cell in which the information is transmitted within the specified transmission time interval Reference signal port:

a time interval between the cell reference signal of the third designated antenna port before the specified transmission time interval and the transmission time interval;

Specifying a location of a transmission time interval;

The third designated antenna port belongs to all or part of the antenna ports of the first designated antenna port except the second designated antenna port.
The apparatus for transmitting information according to any one of claims 32 to 34, wherein

If the first designated antenna port is 4 cell reference signal antenna ports, the second designated antenna port is 2 cell reference signal antenna ports;

If the first designated antenna port is two cell reference signal antenna ports, the second designated antenna port is one cell reference signal antenna port.
The apparatus for transmitting information according to claim 36, wherein

If the first designated antenna port is a cell reference signal antenna port 0, 1, 2, 3, the second designated antenna port is a cell reference signal antenna port 0 and 1, or 2 and 3;

If the first designated antenna port is the cell reference signal antenna port 0, 1, the second designated antenna port is the cell reference signal antenna port 0 or 1;

If the first designated antenna port is the cell reference signal antenna port 2, 3, the second designated antenna port is the cell reference signal antenna port 2 or 3.
The apparatus for transmitting information according to claim 22, wherein said transmission unit is further configured to be in a multicast broadcast single frequency network subframe of a multimedia broadcast multicast service, in a multicast broadcast single frequency network resource region Punch the information.
The apparatus for transmitting information according to claim 22, wherein, in the multicast broadcast single frequency network subframe, for the downlink control information and/or the downlink data information based on the cell reference signal transmission, the downlink control information and/or Or transmitting a cell reference signal in a frequency domain resource corresponding to the downlink data information.
The apparatus for transmitting information according to claim 39, wherein the symbol for transmitting the cell reference signal satisfies one of the following:

All symbols in the symbol are within the transmission time interval;

a partial symbol in the symbol is within the transmission time interval, and other symbols in the symbol other than the partial symbol are in a subframe in which the transmission time interval is located;

All of the symbols are within a subframe in which the transmission time interval is located and outside of the transmission time interval.
A computer storage medium having computer executable instructions stored thereon, the computer executable instructions being configured to perform the method of transmitting information of any of claims 1-21.