CN107295656B

CN107295656B - Information transmission method, terminal and base station

Info

Publication number: CN107295656B
Application number: CN201610202142.5A
Authority: CN
Inventors: 司倩倩; 高雪娟; 郑方政; 潘学明; 孙韶辉
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2020-03-06
Anticipated expiration: 2036-03-31
Also published as: WO2017167252A1; CN107295656A

Abstract

The invention provides an information transmission method, a terminal and a base station. The information transmission method comprises the following steps: receiving indication information sent by a base station in a physical downlink control channel transmission area, wherein the indication information is used for indicating the transmission time interval length of information transmission in at least one subframe by a terminal; and in at least one subframe, carrying out information transmission with the base station according to the transmission time interval length indicated by the indication information. The terminal receives the indication information which is sent by the base station and indicates the length of the transmission time interval, so that the terminal can transmit the information with the base station according to the length of the transmission time interval indicated by the indication information, and the reliability of service communication is ensured.

Description

Information transmission method, terminal and base station

Technical Field

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

Background

The mobile internet is subverting the traditional mobile communication business mode, providing unprecedented use experience for users, and profoundly influencing the aspects of work and life of people. The mobile internet can promote further upgrading of human social information interaction modes, and provide richer business experiences such as augmented reality, virtual reality, ultra-high definition (3D) video and mobile cloud for users. The further development of the mobile internet will bring the mobile traffic to thousands of times increase in the future, and promote a new revolution of mobile communication technology and industry. The internet of things expands the service range of mobile communication, and extends from person-to-person communication to intelligent interconnection of people and objects, so that the mobile communication technology permeates into wider industries and fields. In the future, mobile medical treatment, internet of vehicles, smart home, industrial control, environmental monitoring and the like will promote the explosive growth of internet of things application, and hundreds of millions of devices will access the network to realize real 'everything interconnection'. Meanwhile, a large amount of equipment connection and diversified internet of things services can bring new technical challenges to mobile communication.

With the continuous emergence and enrichment of new service demands, higher performance demands are put on future mobile communication systems, such as higher peak rate, better user experience rate, smaller delay, higher reliability, higher spectrum efficiency and higher energy consumption efficiency, and the like, and more users need to be supported to access and use various service types. In order to support various terminal connections with huge number and different service types, flexible configuration of uplink and downlink resources becomes a great trend of technical development. Future system resources can be divided into different sub-bands according to different services, and Transmission Time Intervals (TTIs) with different lengths are divided on the sub-bands to meet various service requirements.

First, introduction of existing LTE subframe structure

1. The conventional Long Term Evolution-Frequency division duplexing (LTE-FDD) system uses a frame structure (FS 1) as shown in fig. 1. In an FDD system, uplink and downlink transmissions use different carrier frequencies, and both uplink and downlink transmissions use the same frame structure. On each carrier, a 10ms long radio frame consists of 101 ms subframes, each of which is divided into two 0.5ms slots. The TTI duration for uplink and downlink data transmission is 1 ms.

2. The conventional Long Term Evolution-Time Division Duplexing (LTE-TDD) system uses a frame structure type 2 (FS 2 for short) 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 10ms radio frame in FS2 consists of two 5ms fields, each field containing 5 subframes of 1ms length. Subframes in FS2 are divided into three categories: the subframe comprises a Downlink subframe, an Uplink subframe and special subframes, wherein each special subframe comprises a Downlink transmission Time Slot (DwPTS), a Guard Period (GP) and an Uplink transmission Time Slot (UpPTS). The DwPTS can transmit downlink pilot frequency, downlink service data and downlink control signaling; the GP does not transmit any signal; the UpPTS transmits only a random access and Sounding Reference Signal (SRS), and cannot transmit uplink traffic or uplink control information. Each half frame comprises at least 1 downlink subframe, at least 1 uplink subframe and at most 1 special subframe. Table 1 shows 7 uplink and downlink subframe configurations supported in FS 2.

7 uplink and downlink subframe configuration modes supported in table 1 FS2

Wherein D denotes a downlink transmission time slot, S denotes a guard interval, and U denotes an uplink transmission time slot.

Second, introduction of existing LTE downlink control channel

1. Physical Downlink Control Channel (PDCCH)

The PDCCH of the LTE system is used to carry scheduling information and other control information, a plurality of PDCCHs may be located in a control region of each downlink subframe, the size of the control region is determined by a Physical Control Format Indicator Channel (PCFICH), which is mainly used to carry CFI, and occupies 1 to 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols. Transmission of one control Channel occupies one Control Channel Element (CCE) or multiple consecutive CCEs, each CCE is composed of 9 Resource Element Groups (REGs), and a REG included in a CCE of a PDCCH is a REG that is not used for carrying a PCFICH and a Physical Hybrid ARQ Indicator Channel (PHICH).

2. Enhanced Physical Downlink Control Channel (EPDCCH)

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

With the development of mobile technology, future mobile communication systems need to provide lower network latency and support richer traffic types. It is a trend of technical development to dynamically configure the TTI length and the resources occupied in the TTI according to the service requirements. However, in the existing LTE system, the TTI length is fixed to 1ms, and when the TTI length is variable, the terminal has no specific method to obtain the length occupied by the TTI.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide an information transmission method, a terminal and a base station, so as to solve the problem that the existing terminal cannot acquire the length occupied by the TTI when the TTI length is variable, thereby affecting the service communication.

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

receiving indication information sent by a base station in a physical downlink control channel transmission area, wherein the indication information is used for indicating the transmission time interval length of information transmission in at least one subframe by a terminal;

and in at least one subframe, carrying out information transmission with the base station according to the transmission time interval length indicated by the indication information.

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

Further, 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 region.

Further, when the indication information is dedicated for a cell, the indication information is transmitted in a common search space in a physical downlink control channel transmission region.

Further, the indication information further includes identification 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 region, the information transmission method further includes:

and receiving a radio resource control signaling sent by the base station, wherein the radio resource control signaling is used for indicating the terminal to read the position of the transmission time interval length in the indication information.

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

Further, the indication information is transmitted by taking N subframes as a period; wherein,

n is an integer greater than or equal to 1.

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

The terminal carries out the identification information of the length value of the transmission time interval length of information transmission in at least one subframe in a preset transmission time interval length value set.

Further, the indication information takes effect from the current subframe; or

The indication information takes effect from the position of a preset number of subframes after the current subframe.

Further, the indication information is used for indicating the length of a transmission time interval 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; wherein,

the first physical downlink control channel refers to a physical downlink control channel with a transmission time interval length of less than 1 millisecond.

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

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

and the first transmission module is used for carrying out information transmission with the base station in at least one subframe according to the transmission time interval length indicated by the indication information.

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

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

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 region.

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

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

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 by taking N subframes as a cycle; wherein,

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 for the terminal to perform information transmission in at least one subframe, or

Further, the indication information received by the receiving module takes effect from the current subframe; or

Further, the indication information received by the receiving module 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; wherein,

The embodiment of the invention provides an information transmission method, which comprises the following steps:

sending indication information to a terminal in a physical downlink control channel transmission area, wherein the indication information is used for indicating the transmission time interval length of information transmission in at least one subframe by the terminal;

and in the at least one subframe, transmitting information with the terminal by adopting the transmission time interval length indicated in the indication information.

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

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

and sending a radio resource control signaling to the terminal, wherein the radio resource control signaling is used for indicating the terminal to read the position of the transmission time interval length in the indication information.

n is an integer greater than or equal to 1.

Further, the indication information takes effect from the current subframe; or

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

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

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

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

Further, 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 region.

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 region.

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

Further, before sending the indication information, the sending module sends a radio resource control signaling to the terminal, where the radio resource control signaling is used to indicate the terminal to read the position 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 uses N subframes as periodic transmission; wherein,

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 for the terminal to perform information transmission in at least one subframe, or

Further, the indication information sent by the sending module takes effect from the current subframe; or

Further, the indication information sent by the sending module is used to indicate a length of a transmission time interval 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; wherein,

The invention has the beneficial effects that:

according to the scheme, when the terminal communicates with the base station, the terminal receives the indication information carrying the transmission time interval length indicating the information transmission in at least one subframe, and the terminal can definitely know the transmission time interval length used in the communication process with the base station by analyzing the indication information, so that the reliability of the communication between the terminal and the base station is ensured.

Drawings

Figure 1 shows a schematic diagram of a frame structure used by an LTE FDD system;

fig. 2 shows a schematic diagram of a frame structure used by the LTE TDD system;

fig. 3 is a flowchart illustrating an information transmission method according to a first embodiment of the invention;

FIG. 4 is a schematic diagram illustrating a TTI length indication method in the first embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a TTI length indication method of the first embodiment of the present invention;

FIG. 6 is a schematic diagram showing a TTI length indication method in the first embodiment of the present invention;

FIG. 7 is a diagram illustrating a TTI length indication method according to the first embodiment of the present invention;

fig. 8 is a block diagram of a terminal according to a second embodiment of the present invention;

fig. 9 is a schematic structural diagram of a terminal according to a third embodiment of the present invention;

fig. 10 is a flowchart illustrating an information transmission method according to a fourth embodiment of the present invention;

fig. 11 is a block diagram of a base station according to a fifth embodiment of the present invention;

fig. 12 is a schematic structural diagram of a base station according to a sixth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The invention provides an information transmission method, a terminal and a base station, aiming at the problem that the existing TTI length is variable, the terminal cannot acquire the TTI occupation length and the service communication is influenced.

Example one

As shown in fig. 3, the information transmission method according to the embodiment of the present invention is applied to a terminal side, and includes:

step 31, receiving indication information sent by a base station in a transmission region of a physical downlink control channel, where the indication information is used to indicate a transmission time interval length for a terminal to perform information transmission in at least one subframe;

it should be noted that the transmission time interval length refers to a preset number of OFDM symbols, for example, the transmission time interval length is 2 OFDM symbols.

The indication information may indicate the length of the transmission time interval in the following manner:

the first method is as follows: the indication information comprises a length value of a transmission time interval length for the terminal to transmit information in at least one subframe, namely information in an indication bit of the transmission time interval length in the indication information is the length value of the transmission time interval length;

the second method comprises the following steps: the indication information includes identification information of a length value of a transmission time interval length for information transmission in at least one subframe by the terminal in a preset transmission time interval length value set, that is, by predefining the transmission time interval length value set, when indicating, an indication bit in the indication information only needs to record a specific position of the length value of the transmission time interval length in the transmission time interval length value set.

The indication information in the first mode indicates a specific transmission time interval length, and the indication in the second mode 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 select an appropriate mode to indicate the transmission time interval length according to an actual application situation.

And step 32, in at least one subframe, performing information transmission with the base station according to the transmission time interval length indicated by the indication information.

After the transmission time interval length of information transmission between the base station and the terminal is appointed, the base station and the terminal can transmit information according to the transmission time interval length, and the reliability of communication between the base station and the terminal is ensured when communication is carried out by utilizing the variable transmission time interval length.

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

It should be noted that each subframe includes, at a header, a physical downlink control channel for transmitting scheduling information and other control information, where a physical downlink control channel transmission region refers to a conventional physical downlink control channel transmission region, that is, a format used when the physical downlink control channel transmission region transmits information is the same as a format of an existing physical downlink control channel transmission region.

Specifically, the sent indication information may be dedicated to a user, or dedicated to a cell; when the indication information is exclusive for a user, the indication information is transmitted in a user exclusive search space in a physical downlink control channel transmission area; wherein,

the indication information is used for indicating the downlink transmission time interval length of information transmission in at least one subframe by the terminal.

It should be noted that, in addition to the physical downlink control channel at the head in each subframe, other parts of the subframe further include: the control information for each terminal, that is, the physical downlink control channel corresponding to the specific terminal, is used to carry the control information for the specific terminal, and therefore, in this embodiment, the indication information in the physical downlink control channel in the subframe header is mainly used to indicate the length of the physical downlink control channel carrying the control information for the specific terminal. When the indication information is user-specific, 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 respectively indicate.

When the indication information is exclusive to a cell, the indication information is transmitted in a public search space in a physical downlink control channel transmission area; wherein,

the indication information is used for indicating the length of a downlink transmission time interval for information transmission in at least one subframe by at least one terminal.

It should be noted that, when the indication information is dedicated for a cell, the transmission time interval lengths of multiple terminals may be placed in the same indication information for indication, and in order to ensure that each terminal can obtain a correct transmission time interval length, the indication information may include, in addition to the transmission time interval length of each terminal, identification information of the terminal, that is, in the indication information, the identification information of each terminal corresponds to an indication of the transmission time interval length corresponding to the identification information, and the terminal receives the indication information and extracts the corresponding transmission time interval length according to its own identification information.

If the length allocated to the indication information is limited, when only the transmission time interval lengths of a plurality of terminals are transmitted in the indication information, the following method can be adopted to ensure that the terminals can acquire the correct transmission time interval length:

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

When the terminal receives the dedicated indication information of the cell, the terminal can obtain the transmission time interval length of the terminal in the indication information according to the position of the terminal for reading the transmission time interval length.

It should be noted that, because the indication information is newly added to the transmission area of the conventional physical downlink control channel, in order to distinguish the indication information from the original information, the indication information is scrambled by using a preset Radio Network Temporary Identifier (RNTI).

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

It should be noted that, the indication information is scrambled by using an RNTI, which 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, which ensures the accuracy of obtaining the indication information.

In general, when a base station communicates with a terminal, the lengths of transmission time intervals used in different time periods may be different, the length of the time period may be one subframe or multiple subframes, and if the time period is one subframe, the indication information may be transmitted in each subframe; if the subframe is a plurality of subframes, the indication information can be transmitted by taking N subframes as a period, and the indication information is used for indicating the length of the transmission time interval in the N subframes; wherein,

n is an integer greater than 1.

As a result, when the base station transmits the instruction information, the instruction information may be transmitted in each subframe, or the instruction information may be transmitted in a cycle of a plurality of subframes.

Optionally, the indication information takes effect from the current subframe; or

It should be noted that the indication information transmitted by the current subframe may be only used to indicate the length of the transmission time interval between the terminal and the base station when communicating in the current subframe; or the indication information transmitted by the current subframe is not used for indicating the transmission time interval length in the current subframe, but is used for indicating that the subframe after a preset number of subframes of the current subframe uses the transmission time interval length to transmit information, for example, the current subframe is X, and the indication information is effective from subframe X + Y, that is, the information is transmitted from subframe X + Y using the transmission time interval length in the indication information, wherein Y is an integer greater than or equal to 1.

It should be noted that, because the indication information is mainly used to indicate the transmission time interval length used by the first physical downlink control channel of each terminal, the format of the first physical downlink control channel is a new physical downlink control channel format that has a different physical downlink control channel format from the physical downlink control channel format corresponding to the original terminal after using the transmission time interval length, and 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 further noted that the indication information may indicate not only the length of the transmission time interval of the first physical downlink control channel, but also the length of the transmission time interval of at least one of a physical downlink data channel, a physical uplink control channel, and a physical uplink data channel; and when the length of the transmission time interval of one or more of the physical downlink data 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 which is not indicated in the three channels is indicated by the downlink control information in the first physical downlink control channel.

In practical applications, specific applications of the present invention are illustrated as follows, and in the following examples, an S-PDCCH is used to indicate a physical downlink control channel with a TTI length newly indicated, an S-PDSCH is used to indicate a physical downlink data channel with a TTI length newly indicated, an S-PUCCH is used to indicate a physical uplink control channel with a TTI length newly indicated, and an S-PUSCH is used to indicate a physical uplink data channel with a TTI length newly indicated, respectively.

The first condition is as follows:

as shown in fig. 4, the base station schedules terminal 1 and terminal 2 in both subframe n and subframe n +1, terminal 1 uses TTI of 3 OFDM symbol length for transmission in subframe n (since one subframe usually includes 14 OFDM symbols, the common PDCCH occupies 2 OFDM symbols, and there are 12 OFDM symbols behind it for allocation of TTI length), and uses TTI of 4 OFDM symbol length for transmission in subframe n +1 (see the part shown by the solid line box except the common PDCCH and denoted by S-PDCCH 1); terminal 2 transmits in subframe n using a TTI of 4 OFDM symbols and in subframe n +1 using a TTI of 2 OFDM symbols (see the dashed box indicated, denoted by S-PDCCH 2).

The base station transmits indication information in a conventional PDCCH region through a common search space, wherein the indication information is used for indicating the TTI length (including the TTI length used by an S-PDCCH and an S-PDSCH) used by a terminal in a current subframe, the base station uses a conventional PDCCH format for indication, the conventional PDCCH format is scrambled through a specific RNTI, and the terminal can determine whether the corresponding PDCCH is used for transmitting DCI indicating the TTI length by detecting the RNTI. The PDCCH indication information includes at least two information fields for indicating TTI lengths of terminal 1 and terminal 2, respectively, and assuming that a set of available TTI length values is {2, 3, 4, and 7}, information bits for indicating the TTI lengths and corresponding TTI lengths are as shown in table 2. Only one possible indication method of the TTI length is given, specifically, a specific TTI length can also be indicated, and there are many possibilities for the available TTI length set, and the method is not limited to the above.

TTI length	Indication bit
			2	00
3	01
		4	10
7	11

TABLE 2 correspondence of TTI length to information bits of TTI length

In the indication information of the subframe n, the base station instructs the terminal 1 to use 3 TTIs of OFDM symbol length for transmission by bit 01 and instructs the terminal 2 to use 4 TTIs of OFDM symbol length for transmission by bit 10; in the indication information of subframe n +1, the base station instructs terminal 1 to use 4 TTIs of OFDM symbol length for transmission by bit 10, and instructs terminal 2 to use 2 TTIs of OFDM symbol length for transmission by bit 00; and after receiving the indication information, the terminal detects the s-PDCCH according to the TTI length indicated by the indication information, 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 two:

as shown in fig. 5, only in the case where the base station schedules one terminal, the base station transmits indication information in subframe n, indicating that the terminal transmits in a TTI of 3 OFDM symbols in the time period from subframe n to subframe n +4, and the indication information may be transmitted only in subframe n or repeatedly transmitted in subframe n to subframe n + 4.

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

Case three:

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

Case four:

as shown in fig. 7, the case where the base station schedules only one terminal is explained, where the base station indicates the TTI length used in the subframe n +1 in the subframe n, and the terminal transmits the S-PUSCH in the subframe n +1 in accordance with the indication of the base station. For example, the base station uses a conventional PDCCH in subframe n, and instructs the terminal to transmit uplink data using a TTI of 7 OFDM symbols in subframe n +1 through bit 0111; then in subframe n +1 the terminal transmits S-PUSCH using a TTI of 7 OFDM symbol length.

In the above embodiments of the present invention, by transmitting the indication information for indicating the length of the transmission time interval in the conventional PDCCH region, the terminal can explicitly know the length of the transmission time interval used in the subframe for transmitting the information through the indication information, and then transmit the information according to the length of the transmission time interval, thereby ensuring the reliability of communication with the base station.

Example two

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

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

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

Optionally, the indication information received by the receiving module 81 is transmitted by the base station in 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 region; wherein,

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 region; wherein,

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

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 cycle of N subframes; wherein,

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 for the terminal to perform information transmission in at least one subframe, or

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

Optionally, the indication information received by the receiving module 81 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; wherein,

It should be noted that the embodiment of the terminal is a terminal corresponding to the above method embodiments one to one, and all implementation manners in the above method embodiments are applicable to the embodiment of the terminal, and the same technical effect can be achieved.

EXAMPLE III

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

a processor 91; and a memory 93 connected to the processor 91 through a bus interface 92, wherein the memory 93 is used for storing programs and data used by the processor 91 in executing operations, and when the processor 91 calls and executes the programs and data stored in the memory 93, the following processes are performed:

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

and performs information transmission with the base station through the transceiver 94 according to the length of the transmission time interval indicated by the indication information in at least one subframe.

Among other things, a transceiver 94 is connected 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, with one or more processors represented by processor 91 and various circuits of memory represented by memory 93 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 94 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 95 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 91 is responsible for managing the bus architecture and general processing, and the memory 93 may store data used by the processor 91 in performing operations.

Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

Example four

As shown in fig. 10, an example of the present invention provides an information transmission method, applied to a base station side, including:

step 101, sending indication information to a terminal in a physical downlink control channel transmission area, wherein the indication information is used for indicating the transmission time interval length of information transmission in at least one subframe by the terminal;

and 102, in the at least one subframe, transmitting information with the terminal by using the transmission time interval length 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 region.

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 region.

Optionally, when the indication information is cell-specific, the indication information further includes identification information of a terminal.

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

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

Optionally, the indication information is transmitted periodically in N subframes; wherein,

n is an integer greater than or equal to 1.

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

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; wherein,

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

EXAMPLE five

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

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

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

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

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

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 region.

Optionally, the indication information sent by the sending module 111 further includes identification 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 position 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 periodically with N subframes; wherein,

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 for the terminal to perform information transmission in at least one subframe, or

Optionally, the indication information sent by the sending module 111 takes effect from the current subframe; or

Optionally, the indication information sent by the sending module 111 is used to indicate a length of a transmission time interval 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; wherein,

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

EXAMPLE six

As shown in fig. 12, the present embodiment provides a base station, including:

a processor 121; and a memory 123 connected to the processor 121 through a bus interface 122, wherein the memory 123 is used for storing programs and data used by the processor 121 in executing operations, and when the processor 121 calls and executes the programs and data stored in the memory 123, the following processes are performed:

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

and in the at least one subframe, transmitting information with the terminal through the transceiver 124 by using the transmission time interval length indicated in the indication information.

Among other things, 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, with one or more processors represented by processor 121 and various circuits of memory represented by memory 123 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 124 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 121 is responsible for managing a bus architecture and general processing, and the memory 123 may store data used by the processor 121 when performing operations.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. An information transmission method, comprising:

in at least one subframe, carrying out information transmission with the base station according to the transmission time interval length indicated by the indication information;

the indication information also comprises identification information of the terminal;

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

receiving a radio resource control signaling sent by a base station, wherein the radio resource control signaling is used for indicating a terminal to read the position of the transmission time interval length in the indication information;

the indication information comprises identification information of a length value of a transmission time interval length for information transmission in at least one subframe by the terminal in a preset transmission time interval length value set;

the indication information takes effect from the current sub-frame; or

2. 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.

3. The information transmission method according to claim 1, wherein 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 region.

4. 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 region.

5. The information transmission method according to claim 1, wherein the indication information is scrambled by using a preset radio network temporary identifier.

6. The information transmission method according to claim 1, wherein the indication information is transmitted periodically in N subframes; wherein,

n is an integer greater than or equal to 1.

7. The information transmission method according to claim 1, wherein 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; wherein,

8. A terminal, comprising:

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

the indication information received by the receiving module also comprises identification information of the terminal;

before receiving the indication information, the receiving module further receives a radio resource control signaling sent by the base station, where the radio resource control signaling is used to indicate a position where the terminal reads a transmission time interval length in the indication information;

the indication information received by the receiving module comprises identification information of a length value of a transmission time interval length for information transmission in at least one subframe by the terminal in a preset transmission time interval length value set;

the indication information received by the receiving module takes effect from the current subframe; or

9. The terminal of claim 8, wherein the indication information received by the receiving module is transmitted by a base station in a physical downlink control channel format.

10. The terminal of claim 8, wherein when the indication information received by the receiving module is user-specific, the indication information is transmitted in a user-specific search space in a physical downlink control channel transmission region.

11. The terminal of claim 8, 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 region.

12. The terminal of claim 8, wherein the indication information received by the receiving module is scrambled by using a preset radio network temporary identifier.

13. The terminal of claim 8, wherein the indication information received by the receiving module is transmitted in a cycle of N subframes; wherein,

n is an integer greater than or equal to 1.

14. The terminal of claim 8, wherein the indication information received by the receiving module is used to indicate a length of a transmission time interval 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; wherein,

15. An information transmission method, comprising:

in the at least one subframe, the transmission time interval length indicated in the indication information is adopted to carry out information transmission with the terminal;

before the step of sending the indication information to the terminal in the physical downlink control channel transmission region, the information transmission method further includes:

sending a radio resource control signaling to the terminal, wherein the radio resource control signaling is used for indicating the terminal to read the position of the transmission time interval length in the indication information;

the indication information takes effect from the current sub-frame; or

16. The information transmission method according to claim 15, wherein the indication information is sent to the terminal in a physical downlink control channel format.

17. The information transmission method according to claim 15, wherein 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 region.

18. The information transmission method according to claim 15, 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 region.

19. The information transmission method according to claim 15, wherein the indication information is scrambled by using a preset radio network temporary identifier.

20. The information transmission method according to claim 15, wherein the indication information is transmitted periodically in N subframes; wherein,

n is an integer greater than or equal to 1.

21. The information transmission method according to claim 15, wherein 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; wherein,

22. A base station, comprising:

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

the indication information sent by the sending module also comprises identification information of the terminal;

before sending the indication information, the sending module also sends a radio resource control signaling to the terminal, wherein the radio resource control signaling is used for indicating the terminal to read the position of the transmission time interval length in the indication information;

the indication information sent by the sending module comprises identification information of a length value of a transmission time interval length for information transmission in at least one subframe by the terminal in a preset transmission time interval length value set;

the indication information sent by the sending module takes effect from the current subframe; or

23. The base station of claim 22, wherein the indication information sent by the sending module is sent to the terminal in a physical downlink control channel format.

24. The base station of claim 22, 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 region.

25. The base station of claim 22, 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 region.

26. The base station of claim 22, wherein the indication information sent by the sending module is scrambled by using a preset radio network temporary identifier.

27. The base station of claim 22, wherein the sending module transmits periodically in N subframes; wherein,

n is an integer greater than or equal to 1.

28. The base station of claim 22, wherein the indication information sent by the sending module is used to indicate a length of a transmission time interval 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; wherein,