WO2017167252A1 - Information transmission method and terminal, and base station - Google Patents

Abstract

Provided in the present disclosure are an information transmission method and terminal, and base station. The information transmission method comprises: receiving indication information sent in a transmission region of a physical downlink control channel by a base station, the indication information being used to indicate a transmission time interval length for information transmission of a terminal in at least one subframe; and performing, in at least one subframe and according to the transmission time interval length indicated by the indication information, information transmission with the base station.

Description

Information transmission method, terminal and base station

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201610202142.5, filed on Jan. 31,,,,,,,,

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to an information transmission method, a terminal, and a base station.

Background technique

The mobile Internet is subverting the traditional mobile communication business model, providing users with an unprecedented experience, which has a profound impact on all aspects of people's work and life. The mobile Internet will promote the further upgrade of human social information interaction methods, providing users with a richer business experience such as augmented reality, virtual reality, ultra high definition (3D) video, mobile cloud and so on. The further development of the mobile Internet will bring about a thousand times increase in mobile traffic in the future, and promote a new round of changes in mobile communication technologies and industries. The Internet of Things has expanded the range of services for mobile communications, from human-to-human communication to the intelligent interconnection of people and things, things and things, making mobile communication technology penetrate into a wider range of industries and fields. In the future, mobile medical, car networking, smart home, industrial control, environmental monitoring, etc. will promote the explosive growth of IoT applications, and hundreds of billions of devices will access the network to achieve a true “Internet of Everything”. At the same time, massive device connectivity and diverse IoT services will also bring new technical challenges to mobile communications.

As new business requirements continue to emerge and become more demanding, higher performance demands are placed on future mobile communication systems, such as higher peak rates, better user experience rates, smaller latency, and higher reliability. Higher spectral efficiency and higher energy efficiency, and need to support more user access and use various types of services. In order to support a large number of types of terminal connections and different types of services, the flexible configuration of uplink and downlink resources has become a major trend in technology development. The future system resources can be divided into different sub-bands according to different services, and different transmission time intervals (TTIs) of different lengths are allocated on the sub-bands to meet various service requirements.

I. Introduction of existing LTE subframe structure

1. Existing Long Term Evolution-Frequency Division The Duplexing, LTE-FDD system uses a frame structure type 1, FS1, and its structure is shown in FIG. 1. In the FDD system, the uplink and downlink transmissions use different carrier frequencies, and both the uplink and downlink transmissions use the same frame structure. On each carrier, a 10ms-length radio frame contains 10 1ms subframes, each of which is divided into two 0.5ms long slots. The TTI duration of uplink and downlink data transmission is 1 ms.

2. The existing Long Term Evolution-Time Division Duplexing (LTE-TDD) system uses a frame structure type 2 (FS2), as shown in FIG. 2 . In a TDD system, uplink and downlink transmissions use different subframes or different time slots on the same frequency. Each 10 ms radio frame in FS2 consists of two 5 ms half frames, each of which contains five subframes of 1 ms length. The sub-frames in FS2 are classified into three types: downlink sub-frames, uplink sub-frames, and special sub-frames. Each special sub-frame consists of Downlink Pilot Time Slot (DwPTS), Guard Period (GP), and Uplink Pilot Time Slot (UpPTS) is composed of three parts. The DwPTS can transmit the downlink pilot, the downlink service data, and the downlink control signaling; the GP does not transmit any signal; the UpPTS only transmits the random access and the Sounding Reference Symbol (SRS), and cannot transmit the uplink service or the uplink control information. Each field includes at least one downlink subframe and at least one uplink subframe, and at most one special subframe. Table 7 lists the seven uplink and downlink subframe configurations supported by FS2.

Table 1 Configuration methods of the seven uplink and downlink subframes supported by FS2

Where D represents a downlink transmission slot, S represents a guard interval, and U represents an uplink transmission slot.

Second, the existing LTE downlink control channel introduction

1. Physical downlink control channel (PDCCH)

The PDCCH of the LTE system is used to carry scheduling information and other control information, and there may be multiple PDCCHs in the control region of each downlink subframe. The size of the control region is determined by a Physical Control Format Indicator Channel (PCFICH). It is determined by the bearer CFI), which occupies 1 to 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols. The transmission of a control channel occupies a control channel element (CCE or a plurality of consecutive CCEs, each CCE is composed of 9 resource element groups (REGs), and the REG included in the CCE of the PDCCH is There is no REG for carrying the PCFICH and the Physical Hybrid ARQ Indicator Channel (PHICH).

2. Enhanced physical downlink control channel (EPDCCH)

In order to expand the capacity of the PDCCH, the EPDCCH is introduced in Rel-11. The EPDCCH is transmitted in a data area in a subframe, and cannot occupy the transmission space of the PDCCH.

With the development of mobile technology, future mobile communication systems need to provide lower network delay and support a wider variety of services. Dynamically configuring the TTI length and the resources occupied in the TTI according to the business requirements has become a trend of technology development. However, in the existing LTE system, the TTI length is fixed to 1 ms. When the TTI length is variable, the terminal does not have a specific method to obtain the length occupied by the TTI.

Summary of the invention

The technical problem to be solved by the present disclosure is to provide an information transmission method, a terminal, and a base station, which are used to solve the problem that the terminal cannot acquire the TTI occupation length and affect the service communication when the TTI length is variable.

In order to solve the above technical problem, an embodiment of the present disclosure provides an information transmission method, including:

Receiving indication information that is sent by the base station in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length of the information transmission by the terminal in at least one subframe;

In at least one subframe, according to the length of the transmission time interval indicated by the indication information, and The base station performs information transmission.

Further, the indication information is transmitted by the base station by using a physical downlink control channel format.

Further, when the indication information is exclusive to the user, the indication information is transmitted in a user-specific search space in the physical downlink control channel transmission area.

Further, when the indication information is specific to a cell, the indication information is transmitted in a common search space in a physical downlink control channel transmission area.

Further, the indication information further includes identifier information of the terminal.

Further, before the step of receiving the indication information sent by the base station in the physical downlink control channel transmission area, the information transmission method further includes:

And receiving the radio resource control signaling sent by the base station, where the radio resource control signaling is used to instruct the terminal to read the location of the transmission time interval length in the indication information.

Further, the indication information is scrambled by using a preset wireless network temporary identifier.

Further, the indication information is transmitted in a period of N subframes;

N is an integer greater than or equal to 1.

Further, the indication information includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or

The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set.

Further, the indication information is valid from the current subframe; or

The indication information is valid from a preset number of subframe positions after the current subframe.

Further, the indication information is used to indicate a transmission time interval length of at least one of a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe; among them,

The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond.

An embodiment of the present disclosure provides a terminal, including:

a receiving module, configured to receive indication information that is sent by the base station in a physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length at which the terminal performs information transmission in at least one subframe;

And a first transmission module, configured to perform information transmission with the base station according to a length of a transmission time interval indicated by the indication information in at least one subframe.

Further, the indication information received by the receiving module is transmitted by the base station by using a physical downlink control channel format.

Further, when the indication information received by the receiving module is exclusive to the user, the indication information is transmitted in a user-specific search space in the physical downlink control channel transmission area.

Further, when the indication information received by the receiving module is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area.

Further, the indication information received by the receiving module further includes identifier information of the terminal.

Further, before receiving the indication information, the receiving module further receives radio resource control signaling sent by the base station, where the radio resource control signaling is used to instruct the terminal to read the length of the transmission time interval in the indication information. position.

Further, the indication information received by the receiving module is scrambled by using a preset wireless network temporary identifier.

Further, the indication information received by the receiving module is transmitted in a period of N subframes;

N is an integer greater than or equal to 1.

Further, the indication information received by the receiving module includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or

The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set.

Further, the indication information received by the receiving module is valid from the current subframe; or

The indication information is valid from a preset number of subframe positions after the current subframe.

Further, the indication information received by the receiving module is used to indicate transmission of at least one of a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe. Length of time interval;

The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond.

An embodiment of the present disclosure provides an information transmission method, including:

Sending indication information to the terminal in the physical downlink control channel transmission area, where the indication information is used And indicating a transmission time interval length at which the terminal performs information transmission in at least one subframe;

And transmitting, in the at least one subframe, information transmission with the terminal by using a length of a transmission time interval indicated in the indication information.

Further, the indication information is sent to the terminal in a physical downlink control channel format.

Further, when the indication information is exclusive to the user, the indication information is transmitted in a user-specific search space in the physical downlink control channel transmission area.

Further, when the indication information is specific to a cell, the indication information is transmitted in a common search space in a physical downlink control channel transmission area.

Further, the indication information further includes identifier information of the terminal.

Further, before the step of transmitting the indication information to the terminal in the physical downlink control channel transmission area, the information transmission method further includes:

Sending radio resource control signaling to the terminal, where the radio resource control signaling is used to instruct the terminal to read the location of the transmission time interval length in the indication information.

Further, the indication information is scrambled by using a preset wireless network temporary identifier.

Further, the indication information is transmitted in a period of N subframes;

N is an integer greater than or equal to 1.

Further, the indication information includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or

The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set.

Further, the indication information is valid from the current subframe; or

The indication information is valid from a preset number of subframe positions after the current subframe.

Further, the indication information is used to indicate a transmission time interval length of at least one of a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe; among them,

The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond.

An embodiment of the present disclosure provides a base station, including:

a sending module, configured to send indication information to the terminal in a physical downlink control channel transmission area, where The indication information is used to indicate a transmission time interval length at which the terminal performs information transmission in at least one subframe;

And a second transmission module, configured to perform information transmission with the terminal by using a length of a transmission time interval indicated in the indication information in the at least one subframe.

Further, the indication information sent by the sending module is sent to the terminal in a physical downlink control channel format.

Further, when the indication information sent by the sending module is exclusive to the user, the indication information is transmitted in a user-specific search space in the physical downlink control channel transmission area.

Further, when the indication information sent by the sending module is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area.

Further, the indication information sent by the sending module further includes identifier information of the terminal.

Further, before sending the indication information, the sending module further sends a radio resource control signaling to the terminal, where the radio resource control signaling is used to instruct the terminal to read the location of the transmission time interval length in the indication information.

Further, the indication information sent by the sending module is scrambled by using a preset wireless network temporary identifier.

Further, the sending module transmits in a period of N subframes;

N is an integer greater than or equal to 1.

Further, the indication information sent by the sending module includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or

The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set.

Further, the indication information sent by the sending module is valid from the current subframe; or

The indication information is valid from a preset number of subframe positions after the current subframe.

Further, the indication information sent by the sending module is used to indicate transmission of at least one of a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe Length of time interval;

The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond.

The beneficial effects of the present disclosure are:

In the above solution, when the terminal communicates with the base station, by receiving the indication information carrying the length of the transmission time interval indicating the information transmission in the at least one subframe, the terminal can clearly know the communication process with the base station by analyzing the indication information. The length of the transmission interval used ensures the reliability of the communication between the two.

DRAWINGS

FIG. 1 is a schematic diagram showing a frame structure used by an LTE FDD system;

2 is a schematic diagram showing a frame structure used by an LTE TDD system;

FIG. 3 is a schematic flowchart diagram of an information transmission method according to Embodiment 1 of the present disclosure;

4 is a schematic diagram 1 of a TTI length indication manner according to Embodiment 1 of the present disclosure;

FIG. 5 is a second schematic diagram of a TTI length indication manner according to Embodiment 1 of the present disclosure;

6 is a third schematic diagram of a TTI length indication manner according to Embodiment 1 of the present disclosure;

FIG. 7 is a schematic diagram 4 showing a TTI length indication manner according to Embodiment 1 of the present disclosure;

8 is a block diagram showing a terminal of a second embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a terminal according to Embodiment 3 of the present disclosure;

FIG. 10 is a schematic flowchart diagram of an information transmission method according to Embodiment 4 of the present disclosure;

11 is a block diagram showing a base station of a fifth embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a base station according to Embodiment 6 of the present disclosure.

detailed description

The present disclosure will be described in detail below with reference to the drawings and specific embodiments.

The present disclosure is directed to an existing information transmission method, terminal, and base station when the terminal cannot obtain the TTI occupation length and affects the service communication when the TTI length is variable.

Embodiment 1

As shown in FIG. 3, the information transmission method of the embodiment of the present disclosure is applied to the terminal side, and includes:

Step 31: Receive indication information that is sent by the base station in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length in which the terminal performs information transmission in at least one subframe.

It should be noted that the foregoing transmission time interval length refers to a preset number of OFDM symbols, such as a transmission time interval length of 2 OFDM symbols.

The indication information may be indicated by the length of the transmission time interval as follows:

Manner 1: The indication information includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, that is, information in the indication bit indicating the length of the transmission time interval in the information is the length of the transmission time interval. Length value

Manner 2: The indication information includes identifier information of a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe in a preset transmission time interval length value set, that is, a predefined transmission time interval length The value set, when indicating, the indication bit in the indication information only needs to record the specific value of the length value of the length of the transmission time interval in the set of transmission time interval length values.

The indication information in the mode 1 indicates the length of the specific transmission time interval, and the mode 2 indicates that the transmission time interval length belongs to the first of the transmission time interval length value sets. It should be noted that the base station may be based on actual conditions. For the application, choose the appropriate way to indicate the length of the transmission interval.

Step 32: Perform information transmission with the base station according to the length of the transmission time interval indicated by the indication information in at least one subframe.

After the transmission time interval of the information transmission between the base station and the terminal is agreed, the two can transmit information according to the length of the transmission time interval, and ensure communication between the two when communicating with the variable transmission time interval length. Reliability.

It should be noted that the indication information is transmitted by the base station by using a physical downlink control channel format.

It should be noted that each subframe includes a physical downlink control channel for scheduling information and other control information transmission in the header, where the physical downlink control channel transmission area refers to a traditional physical downlink control channel transmission area, that is, physics. The format used by the downlink control channel transmission area to transmit information is the same as that of the existing physical downlink control channel transmission area.

Specifically, the indication information that is sent may be specific to the user, or may be specific to the cell; when the indication information is exclusive to the user, the indication information is transmitted in a user-specific search space in the physical downlink control channel transmission area; among them,

The indication information is used to indicate a downlink transmission time interval length in which the terminal performs information transmission in at least one subframe.

It should be noted that, in addition to the physical downlink control channel of the header in each subframe, the other part of the subframe further includes: control information for each terminal, that is, a physical downlink control channel corresponding to the specific terminal, and the physical downlink The control channel is used to carry the control information of the specific terminal. Therefore, in this embodiment, the indication information in the physical downlink control channel of the subframe header is mainly used to indicate the length of the physical downlink control channel carrying the control information of the specific terminal. When the indication information is exclusive to the user, each indication information only indicates the transmission time interval length of the physical downlink control channel of one terminal, and different terminal users need different indication information to indicate respectively.

When the indication information is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area;

The indication information is used to indicate a downlink transmission time interval length at which at least one terminal performs information transmission in at least one subframe.

It should be noted that, when the indication information is specific to the cell, the transmission time interval length of the multiple terminals may be indicated in the same indication information, in order to ensure that each terminal can obtain the correct transmission time interval length, In addition to the length of the transmission time interval of each terminal, the indication information may further include the identification information of the terminal, that is, in the indication information, the identification information of each terminal corresponds to the length of the transmission time interval corresponding to the terminal, and the terminal receives the indication. The indication information may be extracted according to its own identification information, and the length of the corresponding transmission time interval may be extracted.

If the length of the indication information is limited, when the length of the transmission interval of the multiple terminals is only transmitted in the indication information, the following manner can be adopted to ensure that the terminal can obtain the correct transmission interval length:

Before the step 31, the radio resource control signaling sent by the base station is received, where the radio resource control signaling is used to instruct the terminal to read the location of the transmission time interval length in the indication information.

When the terminal receives the indication information specific to the cell, the terminal may obtain the length of the transmission time interval in the indication information according to the location of the length of the read transmission time interval.

It should be noted that, because the indication information is newly added to the traditional physical downlink control channel transmission area, in order to distinguish the indication information from the original information, the indication information is performed by using a preset radio network temporary identifier (RNTI). Scrambled.

It should be noted here that the indication information is transmitted in a physical downlink control channel format (ie, a conventional physical downlink control channel format).

It should be noted that the indication information is scrambled by using an RNTI, where the RNTI is a defined RNTI corresponding to the indication information, and after receiving the subframe, the terminal can determine whether the indication information exists by detecting the RNTI in the header of the subframe. In this way, the accuracy of the indication information is guaranteed.

Generally, when the base station communicates with the terminal, the length of the transmission time interval used in different time periods may be different. The length of the time period may be one subframe or multiple subframes. If it is one subframe, the indication information may be The transmission is performed in each of the subframes; if the multiple subframes are used, the indication information may be transmitted through the N subframes, and the indication information is used to indicate the length of the transmission time interval in the N subframes;

N is an integer greater than one.

Therefore, when the base station performs the transmission of the indication information, the base station may transmit the indication information in each subframe, or may perform the transmission of the indication information in a plurality of subframes.

Optionally, the indication information is valid from the current subframe; or

The indication information is valid from a preset number of subframe positions after the current subframe.

It should be noted that the indication information of the current subframe transmission may be used only to indicate the length of the transmission time interval between the terminal and the base station in the current subframe; or the indication information of the current subframe transmission is not used to indicate the transmission time in the current subframe. The length of the interval is used to indicate that the subframes in the preset subframes of the current subframe use the length of the transmission interval to transmit information. For example, the current subframe is X, and the indication information is from the subframe X. +Y comes into effect, that is, the transmission of information is performed from the subframe X+Y using the length of the transmission time interval in the indication information, where Y is an integer greater than or equal to one.

It should be noted that, because the indication information is mainly used to indicate the length of the transmission time interval used by the first physical downlink control channel of each terminal, the format of the first physical downlink control channel is the same as the original using the transmission time interval length. A new physical downlink control channel format of the physical downlink control channel format corresponding to the terminal, and the first physical downlink control channel refers to a physical downlink control channel whose transmission time interval is less than 1 millisecond.

It should be noted that the indication information may not only indicate the transmission time interval length of the first physical downlink control channel, but also indicate at least one of a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel. Transmission time interval length; and when physical downlink data When the length of the transmission time interval of one or more of the channel, the physical uplink control channel, and the physical uplink data channel is not indicated by the indication information, the length of the transmission time interval that is not indicated in the foregoing three passes through the first physics. The downlink control information in the downlink control channel is indicated.

In a practical application, the specific application of the present disclosure is exemplified as follows. In the following examples, the physical downlink control channel with the newly indicated TTI length is represented by the S-PDCCH, and the S-PDSCH indicates that the new indication is adopted. The physical downlink data channel of the TTI length, the S-PUCCH represents the physical uplink control channel with the newly indicated TTI length, and the S-PUSCH represents the physical uplink data channel with the newly indicated TTI length.

Case 1:

As shown in FIG. 4, the base station schedules the terminal 1 and the terminal 2 in both the subframe n and the subframe n+1, and the terminal 1 transmits in the subframe n using the TTI of 3 OFDM symbol lengths (because usually in one subframe) Contains 14 OFDM symbols, a common PDCCH occupies 2 OFDM symbols, followed by 12 OFDM symbols for TTI length allocation), and uses 4 OFDM symbol length TTIs for transmission in subframe n+1 (see figure) The portion indicated by the solid line frame other than the common PDCCH is denoted by S-PDCCH 1); the terminal 2 transmits in the subframe n with 4 OFDM symbol length TTIs, and 2 subframes n+1 are used. The TTI of the OFDM symbol length is transmitted (see the portion indicated by the dashed box in the figure, and is marked with S-PDCCH 2).

The base station transmits the indication information through the common search space in the traditional PDCCH region, and is used to indicate the length of the TTI used by the terminal in the current subframe (including the length of the TTI used by the S-PDCCH and the S-PDSCH), and the base station uses the traditional PDCCH format. The indication is that the traditional PDCCH format is scrambled by a specific RNTI, and the terminal can determine whether the corresponding PDCCH is used to transmit the DCI indicating the length of the TTI by detecting the RNTI. In the PDCCH indication information, at least two information fields are respectively used to indicate the TTI lengths of the terminal 1 and the terminal 2, and the TTI length is used to indicate the TTI length, assuming that the available TTI length value set is {2, 3, 4, 7}. The information bits and corresponding TTI lengths are shown in Table 2. Here, only one possible TTI length indication method is given. Specifically, a specific TTI length may also be indicated. There may be multiple possibilities for the available TTI length set, and is not limited to the above.

TTI length Indicator bit 2 00 3 01

4 10 7 11

Table 2 Correspondence between TTI length and information bits of TTI length

In the indication information of the subframe n, the base station indicates, by the bit 01, that the terminal 1 transmits using the TTI of 3 OFDM symbol lengths, and the bit 10 indicates that the terminal 2 transmits using the TTI of 4 OFDM symbol lengths; in the subframe n+1 In the indication information, the base station indicates, by bit 10, that the terminal 1 transmits using a TTI of 4 OFDM symbol lengths, and the bit 00 indicates that the terminal 2 transmits using a TTI of two OFDM symbol lengths; after receiving the indication information, the terminal The TTI length indicated by the indication information detects the s-PDCCH, and after detecting the s-PDCCH, determines the frequency domain position of the s-PDSCH according to the scheduling information and demodulates the data.

Case 2:

As shown in FIG. 5, only the case where the base station schedules one terminal is described. The base station sends indication information in the subframe n, indicating that the terminal has 3 OFDM in the period from the subframe n to the subframe n+4. The TTI of the symbol length is transmitted, and the indication information may be transmitted only in the subframe n or repeatedly in the subframe n to the subframe n+4.

The indication information is transmitted in a common PDCCH region through a common search space, indicating the length of the TTI used by the terminal in 5 subframes (including only the TTI length used by the S-PDCCH). In the S-PDCCH, the base station also needs to indicate the TTI length of the S-PDSCH through a specific information field, and the length of the TTI occupied by the S-PDCCH and the S-PDSCH transmission may be different. For example, in subframe n to subframe n+4, the S-PDCCH is transmitted using a TTI of 3 OFDM symbol lengths, but in subframe n, the S-PDSCH is transmitted using a TTI of 2 OFDM symbol lengths, and In subframe n+1, the S-PDSCH is transmitted using a TTI of 4 OFDM symbol lengths. The terminal first receives the indication information transmitted in the traditional PDCCH region, and then detects the s-PDCCH according to the TTI length indicated by the indication information, detects the s-PDCCH, and determines the TTI length of the s-PDSCH according to the scheduling information transmitted in the s-PDCCH. Position the frequency domain and demodulate the data.

Case 3:

As shown in FIG. 6, only the case where the base station schedules one terminal is described. The base station indicates the length of the TTI used in the subframe n+1 in the subframe n, and indicates the subframe n+2 in the subframe n+1. The length of the TTI used. For example, in the indication information of the subframe n, the base station indicates, by the bit 0011, that the terminal is in the subframe n+1. The TTI receives data of 3 OFDM symbol lengths; in the indication information of the subframe n+1, the base station instructs the terminal to receive data using TTI of 4 OFDM symbol lengths in the subframe n+2 by the bit 0100. Similarly, if the indication information is a periodic transmission, the indication information transmitted in one cycle can be used to indicate which TTI length the terminal uses for reception in the next cycle.

Situation 4:

As shown in FIG. 7 , only the case where the base station schedules one terminal is described. The base station indicates the length of the TTI used in the subframe n+1 in the subframe n, and the terminal transmits the S- in the subframe n+1 according to the indication of the base station. PUSCH. For example, the base station uses the legacy PDCCH in the subframe n, and the terminal 0111 indicates that the terminal transmits the uplink data using the TTI of 7 OFDM symbol lengths in the subframe n+1; then, in the subframe n+1, the terminal uses 7 The TTI of the OFDM symbol length transmits the S-PUSCH.

In the above embodiment of the present disclosure, by transmitting the indication information indicating the length of the transmission time interval in the traditional PDCCH region, the terminal can clearly know the length of the transmission time interval used in the subframe in which the information is transmitted through the indication information, and then according to the transmission. The time interval length is used for information transmission to ensure the reliability of communication with the base station.

Embodiment 2

As shown in FIG. 8, an embodiment of the present disclosure provides a terminal 80, including:

The receiving module 81 is configured to receive indication information that is sent by the base station in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length of the information transmission by the terminal in at least one subframe.

The first transmission module 82 is configured to perform information transmission with the base station according to the length of the transmission time interval indicated by the indication information in at least one subframe.

Optionally, the indication information received by the receiving module 81 is transmitted by the base station by using a physical downlink control channel format.

Optionally, when the indication information received by the receiving module 81 is user-specific, the indication information is transmitted in a user-specific search space in a physical downlink control channel transmission area;

The indication information is used to indicate a downlink transmission time interval length in which the terminal performs information transmission in at least one subframe.

Optionally, when the indication information received by the receiving module 81 is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area;

The indication information is used to indicate a downlink transmission time interval length at which at least one terminal performs information transmission in at least one subframe.

Further, the indication information received by the receiving module 81 further includes identification information of the terminal.

Further, before receiving the indication information, the receiving module 81 further receives radio resource control signaling sent by the base station, where the radio resource control signaling is used to instruct the terminal to read the transmission time interval length in the indication information. s position.

Optionally, the indication information received by the receiving module 81 is scrambled by using a preset wireless network temporary identifier.

Optionally, the indication information received by the receiving module 81 is transmitted in a period of N subframes;

N is an integer greater than or equal to 1.

Optionally, the indication information received by the receiving module 81 includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or

The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set.

Optionally, the indication information received by the receiving module 81 is valid from the current subframe; or

The indication information is valid from a preset number of subframe positions after the current subframe.

Optionally, the indication information received by the receiving module 81 is used to indicate at least one of a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe. Length of transmission interval; where

The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond.

It should be noted that the embodiment of the terminal is a terminal corresponding to the foregoing method embodiment. All the implementation manners in the foregoing method embodiments are applicable to the embodiment of the terminal, and the same technical effects can be achieved.

Embodiment 3

As shown in FIG. 9, the embodiment provides a terminal, including:

a processor 93; and a memory 93 connected to the processor 91 via a bus interface 92, the memory 93 for storing programs and data used by the processor 91 when performing operations, when the processor 91 calls and When executing the programs and data stored in the memory 93, the following execution is performed process:

Receiving, by the transceiver 94, indication information that is sent by the base station in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length of the information transmission by the terminal in at least one subframe;

And in at least one subframe, the information is transmitted by the transceiver 94 and the base station according to the length of the transmission time interval indicated by the indication information.

The transceiver 94 is coupled to the bus interface 92 for receiving and transmitting data under the control of the processor 91.

It should be noted that in FIG. 9, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 91 and various circuits of memory represented by memory 93. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 94 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. For different terminals, the user interface 95 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like. The processor 91 is responsible for managing the bus architecture and general processing, and the memory 93 can store data used by the processor 91 in performing operations.

It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be completed by a computer program indicating related hardware, and the computer program includes instructions for performing some or all of the above steps. And the computer program can be stored in a readable storage medium, which can be any form of storage medium.

Embodiment 4

As shown in FIG. 10, an example of the present disclosure provides an information transmission method, which is applied to a base station side, and includes:

Step 101: Send indication information to the terminal in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length in which the terminal performs information transmission in at least one subframe.

Step 102: In the at least one subframe, perform information transmission with the terminal by using a length of a transmission time interval indicated in the indication information.

Optionally, the indication information is sent to the terminal in a physical downlink control channel format.

Specifically, when the indication information is user-specific, the indication information is transmitted in a user-specific search space in a physical downlink control channel transmission area.

Specifically, when the indication information is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area.

Optionally, when the indication information is specific to the cell, the indication information further includes identifier information of the terminal.

Optionally, when the indication information is specific to the cell, before the step 101, the information transmission method further includes:

Sending radio resource control signaling to the terminal, where the radio resource control signaling is used to instruct the terminal to read the location of the transmission time interval length in the indication information.

Optionally, the indication information is scrambled by using a preset wireless network temporary identifier.

Optionally, the indication information is transmitted in a period of N subframes, where

N is an integer greater than or equal to 1.

Optionally, the indication information includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or

The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set.

Optionally, the indication information is valid from the current subframe; or

The indication information is valid from a preset number of subframe positions after the current subframe.

Specifically, the indication information is used to indicate a transmission time interval length of at least one of a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe; among them,

The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond.

All of the descriptions of the base station in the first embodiment are applicable to the embodiment of the information transmission method applied to the base station side, and the same technical effects can be achieved.

Embodiment 5

As shown in FIG. 11, an embodiment of the present disclosure provides a base station 110, including:

The sending module 111 is configured to send indication information to the terminal in the physical downlink control channel transmission area, where The indication information is used to indicate a transmission time interval length at which the terminal performs information transmission in at least one subframe;

The second transmission module 112 is configured to perform information transmission with the terminal by using a length of a transmission time interval indicated in the indication information in the at least one subframe.

Optionally, the indication information sent by the sending module 111 is sent to the terminal in a physical downlink control channel format.

Optionally, when the indication information sent by the sending module 111 is exclusive to the user, the indication information is transmitted in a user-specific search space in the physical downlink control channel transmission area.

Optionally, when the indication information sent by the sending module 111 is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area.

Optionally, the indication information sent by the sending module 111 further includes identifier information of the terminal.

Optionally, before sending the indication information, the sending module 111 further sends a radio resource control signaling to the terminal, where the radio resource control signaling is used to indicate that the terminal reads the location of the transmission time interval length in the indication information. .

Optionally, the indication information sent by the sending module 111 is scrambled by using a preset wireless network temporary identifier.

Optionally, the sending module 111 transmits in a period of N subframes, where

N is an integer greater than or equal to 1.

Optionally, the indication information sent by the sending module 111 includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or

The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set.

Optionally, the indication information sent by the sending module 111 is valid from the current subframe; or

The indication information is valid from a preset number of subframe positions after the current subframe.

Optionally, the indication information sent by the sending module 111 is used to indicate at least one of a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe. Length of transmission interval; where

The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond.

It should be noted that the embodiment of the base station is a base station corresponding to the foregoing method embodiment. All the implementation manners in the foregoing method embodiments are applicable to the embodiment of the base station, and the same technical effects can be achieved.

Embodiment 6

As shown in FIG. 12, this embodiment provides a base station, including:

a processor 121; and a memory 123 connected to the processor 121 via a bus interface 122, the memory 123 is configured to store programs and data used by the processor 121 when performing operations, when the processor 121 calls and When executing the programs and data stored in the memory 123, the following process is performed:

Transmitting, by the transceiver 124, the indication information to the terminal in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length in which the terminal performs information transmission in at least one subframe;

In the at least one subframe, information transmission is performed by the transceiver 124 and the terminal by using a transmission time interval length indicated in the indication information.

The transceiver 124 is coupled to the bus interface 122 for receiving and transmitting data under the control of the processor 121.

It should be noted that in FIG. 12, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 121 and various circuits of memory represented by memory 123. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 124 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 121 is responsible for managing the bus architecture and general processing, and the memory 123 can store data used by the processor 121 when performing operations.

It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be completed by a computer program indicating related hardware, and the computer program includes instructions for performing some or all of the above steps. And the computer program can be stored in a readable storage medium, which can be any form of storage medium.

What has been described above is a preferred embodiment of the present disclosure, and it should be noted that it is common to the art. Many modifications and refinements can be made by those skilled in the art without departing from the principles of the disclosure, which are also within the scope of the disclosure.

Claims (46)

An information transmission method includes: Receiving indication information that is sent by the base station in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length of the information transmission by the terminal in at least one subframe; In at least one subframe, information transmission is performed with the base station according to a length of a transmission time interval indicated by the indication information. The information transmission method according to claim 1, wherein the indication information is transmitted by the base station in a physical downlink control channel format. The information transmission method according to claim 1, wherein when the indication information is exclusive to a user, the indication information is transmitted in a user-specific search space in a physical downlink control channel transmission area. The information transmission method according to claim 1, wherein when the indication information is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area. The information transmission method according to claim 4, wherein the indication information further includes identification information of the terminal. The information transmission method according to claim 4, wherein before the step of receiving the indication information sent by the base station in the physical downlink control channel transmission area, the information transmission method further includes: And receiving the radio resource control signaling sent by the base station, where the radio resource control signaling is used to instruct the terminal to read the location of the transmission time interval length in the indication information. The information transmission method according to claim 1, wherein said indication information is scrambled using a wireless network temporary identifier. The information transmission method according to claim 1, wherein the indication information is transmitted in a period of N subframes; N is an integer greater than or equal to 1. The information transmission method according to claim 1, wherein the indication information includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or The length of the transmission time interval length at which the terminal performs information transmission in at least one subframe is in advance The identification information in the set of transmission time interval length values. The information transmission method according to claim 1, wherein said indication information is valid from a current subframe; or The indication information is valid from a preset number of subframe positions after the current subframe. The information transmission method according to claim 1, wherein the indication information is used to indicate a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe. The length of the transmission interval of at least one of them; The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond. A terminal comprising: a receiving module, configured to receive indication information that is sent by the base station in a physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length at which the terminal performs information transmission in at least one subframe; And a first transmission module, configured to perform information transmission with the base station according to a length of a transmission time interval indicated by the indication information in at least one subframe. The terminal according to claim 12, wherein the indication information received by the receiving module is transmitted by the base station in a physical downlink control channel format. The terminal according to claim 12, wherein when the indication information received by the receiving module is exclusive to a user, the indication information is transmitted in a user-specific search space in a physical downlink control channel transmission area. The terminal according to claim 12, wherein when the indication information received by the receiving module is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area. The terminal according to claim 15, wherein the indication information received by the receiving module further includes identification information of the terminal. The terminal according to claim 15, wherein the receiving module further receives radio resource control signaling sent by the base station before receiving the indication information, where the radio resource control signaling is used to indicate that the terminal is in the indication information. The position in which the length of the transmission interval is read. The terminal according to claim 12, wherein the indication information received by the receiving module The wireless network temporary identifier is used for scrambling. The terminal according to claim 12, wherein the indication information received by the receiving module is transmitted in a period of N subframes; N is an integer greater than or equal to 1. The terminal according to claim 12, wherein the indication information received by the receiving module includes a length value of a transmission time interval length in which the terminal transmits information in at least one subframe, or The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set. The terminal according to claim 12, wherein the indication information received by the receiving module is valid from a current subframe; or The indication information is valid from a preset number of subframe positions after the current subframe. The terminal according to claim 12, wherein the indication information received by the receiving module is used to indicate a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink in the at least one subframe. The length of the transmission time interval of at least one of the data channels; wherein The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond. An information transmission method includes: Sending indication information to the terminal in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length in which the terminal performs information transmission in at least one subframe; And transmitting, in the at least one subframe, information transmission with the terminal by using a length of a transmission time interval indicated in the indication information. The information transmission method according to claim 23, wherein the indication information is transmitted to the terminal in a physical downlink control channel format. The information transmission method according to claim 23, wherein when the indication information is exclusive to a user, the indication information is transmitted in a user-specific search space in a physical downlink control channel transmission area. The information transmission method according to claim 23, wherein said indication information is a cell When exclusive, the indication information is transmitted in a common search space in the physical downlink control channel transmission area. The information transmission method according to claim 26, wherein the indication information further includes identification information of the terminal. The information transmission method according to claim 26, wherein before the step of transmitting the indication information to the terminal in the physical downlink control channel transmission area, the information transmission method further includes: Sending radio resource control signaling to the terminal, where the radio resource control signaling is used to instruct the terminal to read the location of the transmission time interval length in the indication information. The information transmission method according to claim 23, wherein said indication information is scrambled using a wireless network temporary identifier. The information transmission method according to claim 23, wherein the indication information is transmitted in a period of N subframes; N is an integer greater than or equal to 1. The information transmission method according to claim 23, wherein the indication information includes a length value of a transmission time interval length in which the terminal performs information transmission in at least one subframe, or The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set. The information transmission method according to claim 23, wherein said indication information is valid from a current subframe; or The indication information is valid from a preset number of subframe positions after the current subframe. The information transmission method according to claim 23, wherein the indication information is used to indicate a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe The length of the transmission interval of at least one of them; The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond. A base station comprising: a sending module, configured to send indication information to the terminal in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length in which the terminal performs information transmission in at least one subframe; And a second transmission module, configured to perform information transmission with the terminal by using a length of a transmission time interval indicated in the indication information in the at least one subframe. The base station according to claim 34, wherein the indication information sent by the sending module is sent to the terminal in a physical downlink control channel format. The base station according to claim 34, wherein when the indication information sent by the sending module is user-specific, the indication information is transmitted in a user-specific search space in a physical downlink control channel transmission area. The base station according to claim 34, wherein, when the indication information sent by the sending module is cell-specific, the indication information is transmitted in a common search space in a physical downlink control channel transmission area. The base station according to claim 37, wherein the indication information sent by the sending module further includes identification information of the terminal. The base station according to claim 37, wherein the sending module further sends a radio resource control signaling to the terminal, where the radio resource control signaling is used to instruct the terminal to read in the indication information, before transmitting the indication information. The location of the transmission interval length. The base station according to claim 34, wherein the indication information sent by the sending module is scrambled by using a preset wireless network temporary identifier. The base station according to claim 34, wherein the transmitting module transmits in a period of N subframes; N is an integer greater than or equal to 1. The base station according to claim 34, wherein the indication information sent by the sending module includes a length value of a transmission time interval length in which the terminal transmits information in at least one subframe, or The identifier information of the length value of the transmission time interval length of the information transmission in the at least one subframe in the preset transmission time interval length value set. The base station according to claim 34, wherein the indication information sent by the sending module is valid from a current subframe; or The indication information is valid from a preset number of subframe positions after the current subframe. The base station according to claim 34, wherein the indication information sent by the sending module a transmission time interval length indicating at least one of a first physical downlink control channel, a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel in the at least one subframe; The first physical downlink control channel refers to a physical downlink control channel whose transmission time interval length is less than 1 millisecond. A terminal comprising: a processor, a memory connected to the processor through a bus interface, and a transceiver connected to the bus interface; wherein the memory is used to store the processor used when performing an operation Programs and data for receiving and transmitting data under control of the processor; when the processor invokes and executes programs and data stored in the memory, the following processes are performed: And receiving, by the transceiver, indication information that is sent by the base station in a physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length of the information transmission by the terminal in at least one subframe; In at least one subframe, information transmission is performed with the base station according to a length of a transmission time interval indicated by the indication information. A base station includes: a processor, a memory connected to the processor through a bus interface, and a transceiver connected to the bus interface; wherein the memory is used to store the processor used when performing an operation Programs and data for receiving and transmitting data under control of the processor; when the processor invokes and executes programs and data stored in the memory, the following processes are performed: Transmitting, by the transceiver, the indication information to the terminal in the physical downlink control channel transmission area, where the indication information is used to indicate a transmission time interval length in which the terminal performs information transmission in at least one subframe; And transmitting, in the at least one subframe, information transmission with the terminal by using a length of a transmission time interval indicated in the indication information.

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