CN108811106B

CN108811106B - Scheduling transmission method and device

Info

Publication number: CN108811106B
Application number: CN201710309351.4A
Authority: CN
Inventors: 林祥利; 高雪娟; 潘学明
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-05-04
Filing date: 2017-05-04
Publication date: 2021-05-18
Anticipated expiration: 2037-05-04
Also published as: CN108811106A

Abstract

The embodiment of the invention relates to the technical field of communication, in particular to a scheduling transmission method, a base station and a terminal, which comprises the following steps: a base station determines the number N of Transmission Time Intervals (TTI) scheduled for a terminal and the number of symbols occupied by each TTI according to a resource scheduling request sent by the terminal, wherein the TTI is a short TTI, the length of the TTI is less than the number of symbols occupied by a subframe, N is a positive integer and N is more than 1; the base station determines a reference signal pattern of the terminal according to the number N of the TTIs and the number of symbols occupied by each TTI; and the base station receives the reference signal sent by the terminal based on the reference signal pattern. It can be seen that the base station can directly determine the reference signal pattern of the terminal according to the number N of TTIs and the number of symbols occupied by each TTI, and receive the reference signal sent by the terminal based on the reference signal pattern, without allocating indication signaling for each TTI, thereby reducing the overhead of the indication signaling.

Description

Scheduling transmission method and device

Technical Field

The embodiment of the invention relates to the field of communication, in particular to a scheduling transmission method and a scheduling transmission device.

Background

A frame structure type 1 (FS 1 for short) is used in an existing LTE (Long Term Evolution, FDD (Frequency Division duplex) system, and the structure of the frame structure type 1 is 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 10 1ms subframes, each of which is divided into two 0.5ms slots. The TTI duration for uplink and downlink data transmission is 1 ms.

In the existing LTE (Long Term Evolution ) TDD (Time Division duplex) system, frame structure type 2 (FS 2 for short) is used, as shown in fig. 2. in the TDD system, Uplink and Downlink transmissions use different subframes or different Time slots on the same frequency, subframes in FS2 are divided into three types, namely, Downlink subframes, Uplink subframes, and special subframes, each special subframe is composed of three parts, namely, Downlink transmission Time slots (DwPTS, Downlink Pilot Time Slot), Guard intervals (GP, Guard period), and Uplink transmission Time slots (UpPTS, Uplink Pilot Time Slot), and each half frame includes at least 1 Downlink subframe, at least 1 Uplink subframe, and at most 1 special subframe.

With the development and change of the mobile communication service demand, a plurality of organizations such as ITU (International Telecommunications Union) define higher user plane delay performance requirements for future mobile communication systems. One of the main methods to shorten the user Time-delay performance is to reduce the TTI (Transmission Time Interval) length. In a conventional subframe, a plurality of short TTIs may be included for transmission, and when a base station continuously schedules a plurality of short TTIs for transmission, how to transmit data and DMRSs (DeModulation Reference Signal) for the scheduled plurality of TTIs has no clear solution at present.

Since a solution for continuous scheduling of a plurality of short TTIs is not clear in the conventional LTE system, when a plurality of uplink short TTIs are scheduled for transmission, a base station needs a large amount of signaling overhead for indication for each transmission structure of the scheduled short TTIs.

In summary, how to reduce the indication signaling overhead in the scheduling of multiple short TTIs becomes a technical problem to be solved urgently.

Disclosure of Invention

The embodiment of the invention provides a scheduling transmission method, a base station and a terminal, which are used for reducing the overhead of an indication signaling in a plurality of short TTI scheduling.

The embodiment of the invention provides a scheduling transmission method, which comprises the following steps:

a base station determines the number N of Transmission Time Intervals (TTI) scheduled for a terminal and the number of symbols occupied by each TTI according to a resource scheduling request sent by the terminal, wherein the TTI is a short TTI, the length of the TTI is less than the number of symbols occupied by a subframe, N is a positive integer and N is more than 1;

the base station determines a reference signal pattern of the terminal according to the number N of the TTIs and the number of symbols occupied by each TTI;

and the base station receives the reference signal sent by the terminal based on the reference signal pattern.

Preferably, the determining, by the base station, the reference signal pattern of the terminal according to the number N of TTIs and the number of symbols occupied by each TTI includes:

the base station determines a reference signal pattern of the terminal from a predefined reference signal pattern set according to the number N of the TTIs and the number of symbols occupied by each TTI;

and the base station generates scheduling indication information according to the reference signal pattern and sends the scheduling indication information to the terminal, wherein the scheduling indication information is used for indicating the terminal to select the reference signal pattern from the reference pattern set.

Preferably, the reference signal pattern set is predefined by:

determining the number X of TTIs to be scheduled according to the number of symbols occupied by the short TTI and a subframe structure to which the short TTI belongs, wherein X is a positive integer and is greater than 1;

setting a Y reference signal pattern according to a reference signal setting rule aiming at the number of symbols occupied by each TTI in X TTIs, wherein the reference signal setting rule is that at most one symbol is set in each TTI to transmit a reference signal, at least one symbol is set in the X TTIs to transmit the reference signal, Y is a positive integer and Y is more than 1;

according to the set Y reference signal patterns, a set of reference signal patterns is predefined.

Preferably, the reference signal setting rule further includes:

and when the symbol occupied by the last TTI in the X TTIs is the last symbol in the subframe structure to which the short TTI belongs, the last symbol occupied by the last TTI is not used for transmitting the DMRS (demodulation-specific reference signal).

a terminal receives a scheduling signaling sent by a base station, wherein the scheduling signaling carries the transmission time interval TTI quantity N scheduled for the terminal by the base station and the symbol quantity occupied by each TTI, the TTI is a short TTI, the length of the TTI is less than the symbol quantity occupied by a subframe, N is a positive integer and N is more than 1;

the terminal determines a reference signal pattern according to the scheduling signaling;

and the terminal sends a reference signal to the base station according to the reference signal pattern.

Preferably, the determining, by the terminal, the reference signal pattern according to the scheduling signaling includes:

the terminal determines a reference signal pattern of the terminal according to the TTI number N and the number of symbols occupied by each TTI; or the like, or, alternatively,

the scheduling signaling further comprises scheduling indication information, wherein the scheduling indication information is used for indicating the terminal to select a reference signal pattern from a predefined reference pattern set;

and the terminal selects a reference signal pattern from the reference pattern set according to the scheduling indication information.

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

a first determining module, configured to determine, according to a resource scheduling request sent by a terminal, a transmission time interval TTI number N scheduled for the terminal and a symbol number occupied by each TTI, where the TTI is a short TTI and a length of the TTI is less than a symbol number occupied by a subframe, N is a positive integer and N is greater than 1;

the terminal is also used for determining a reference signal pattern of the terminal according to the number N of the TTIs and the number of symbols occupied by each TTI;

a first receiving module, configured to receive a reference signal sent by the terminal based on the reference signal pattern.

Preferably, the first determining module is specifically configured to:

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

a second receiving module, configured to receive a scheduling signaling sent by a base station, where the scheduling signaling carries a transmission time interval TTI number N scheduled by the base station for the terminal and a symbol number occupied by each TTI, where the TTI is a short TTI, a length of the TTI is less than a symbol number occupied by a subframe, N is a positive integer, and N is greater than 1;

a second determining module, configured to determine a reference signal pattern according to the scheduling signaling;

and a sending module, configured to send a reference signal to the base station according to the reference signal pattern.

Preferably, the second determining module is specifically configured to:

determining a reference signal pattern of the terminal according to the TTI number N and the number of symbols occupied by each TTI; or the like, or, alternatively,

and selecting a reference signal pattern from the reference pattern set according to the scheduling indication information.

The scheduling transmission method and the base station provided by the above embodiments include: a base station determines the number N of Transmission Time Intervals (TTI) scheduled for a terminal and the number of symbols occupied by each TTI according to a resource scheduling request sent by the terminal, wherein the TTI is a short TTI, the length of the TTI is less than the number of symbols occupied by a subframe, N is a positive integer and N is more than 1; the base station determines a reference signal pattern of the terminal according to the number N of the TTIs and the number of symbols occupied by each TTI; and the base station receives the reference signal sent by the terminal based on the reference signal pattern. It can be seen that the base station can directly determine the reference signal pattern of the terminal according to the number N of TTIs and the number of symbols occupied by each TTI, and receive the reference signal sent by the terminal based on the reference signal pattern, without allocating indication signaling for each TTI, thereby reducing the overhead of the indication signaling.

The scheduling transmission method and the terminal provided by the above embodiments include: a terminal receives a scheduling signaling sent by a base station, wherein the scheduling signaling carries the transmission time interval TTI quantity N scheduled for the terminal by the base station and the symbol quantity occupied by each TTI, the TTI is a short TTI, the length of the TTI is less than the symbol quantity occupied by a subframe, N is a positive integer and N is more than 1; the terminal determines a reference signal pattern according to the scheduling signaling; and the terminal sends a reference signal to the base station according to the reference signal pattern. Therefore, the base station does not need to allocate the indication signaling for each TTI, and the overhead of the indication signaling can be reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of a frame structure type 1 in an LTE system in the prior art;

fig. 2 is a schematic structural diagram of a frame structure type 2 in an LTE system in the prior art;

fig. 3 is a flowchart illustrating a method for scheduling transmission according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a method for predefining a reference signal pattern set according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a subframe structure to which a short TTI belongs according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a subframe structure to which another short TTI belongs according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a subframe structure to which another short TTI belongs according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating another method for scheduling transmission according to an embodiment of the present invention;

fig. 9 is a structural schematic diagram of a DMRS pattern set according to a second embodiment of the present invention;

fig. 10 is a structural schematic diagram of a DMRS pattern set according to a third embodiment of the present invention;

fig. 11 is a structural schematic diagram of a DMRS pattern set according to a fourth embodiment of the present invention;

fig. 12 is a structural schematic diagram of a DMRS pattern provided in a fifth embodiment of the present invention;

fig. 13 is a structural schematic diagram of a DMRS pattern provided in a sixth embodiment of the present invention;

fig. 14 is a schematic structural diagram of a base station according to a sixth embodiment of the present invention;

fig. 15 is a schematic structure of a terminal 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 clearly apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

Fig. 3 is a flowchart illustrating a method for scheduling transmission according to an embodiment of the present invention, where as shown in fig. 3, the method may include:

s301, the base station determines the number N of Transmission Time Intervals (TTI) scheduled for the terminal and the number of symbols occupied by each TTI according to a resource scheduling request sent by the terminal, wherein the TTI is a short TTI, the length of the TTI is less than the number of symbols occupied by a subframe, N is a positive integer and N is greater than 1.

S302, the base station determines the reference signal pattern of the terminal according to the number N of the TTIs and the number of symbols occupied by each TTI.

S303, the base station receives the reference signal sent by the terminal based on the reference signal pattern.

Specifically, in step S302, when the base station determines the reference signal pattern of the terminal according to the number N of TTIs and the number of symbols occupied by each TTI, the following two ways may be adopted:

in a first mode

The base station determines a reference signal pattern of the terminal from a predefined reference signal pattern set according to the number N of the TTIs and the number of symbols occupied by each TTI, and then generates scheduling indication information according to the determined reference signal pattern of the terminal and sends the scheduling indication information to the terminal, wherein the scheduling indication information is used for indicating the terminal to select the reference signal pattern from the reference pattern set.

Mode two

And the base station directly determines the reference signal pattern of the terminal according to the number N of the TTIs and the number of symbols occupied by each TTI.

It can be seen that, when the reference signal pattern of the terminal is determined in the second manner, the base station does not need to send scheduling indication information to the terminal, and therefore, the overhead of the indication signaling can be further reduced.

Optionally, when the base station determines the reference signal pattern of the terminal in the first manner, the base station may further instruct the terminal to select a certain reference signal pattern from a predefined reference signal pattern set according to the channel quality information, the UE speed, the modulation method, and the like, for transmission.

The reference signal pattern may be an uplink reference signal DMRS pattern, and certainly may also be other types of reference signal patterns, and the embodiment of the present invention does not limit the type of the reference signal at all.

The method for predefining the reference signal pattern set can be referred to as the method flow shown in fig. 4.

S401, determining the number X of TTIs to be scheduled according to the number of symbols occupied by the short TTI and the subframe structure to which the short TTI belongs, wherein X is a positive integer and is greater than 1.

S402, aiming at the number of symbols occupied by each TTI in X TTIs, setting a Y reference signal pattern according to a reference signal setting rule, wherein the reference signal setting rule is that at most one symbol is set in each TTI to transmit a reference signal, at least one symbol is set in X TTIs to transmit the reference signal, Y is a positive integer and Y is more than 1.

And S403, predefining a reference signal pattern set according to the set Y reference signal pattern.

In order to enable transmission of other types of Reference signals for the symbol occupied by the last TTI of the X TTIs and the last symbol in the subframe structure to which the short TTI belongs when the set of Reference Signal patterns is predefined, for example, in the case where the last symbol of the last TTI of the X TTIs can be reserved for a possible SRS (Sounding Reference Signal, when the Reference Signal pattern is predefined, the last symbol of the last TTI of the X TTIs is not used for transmission of the demodulation-specific Reference Signal DMRS when the last symbol of the last TTI of the X TTIs is also the last symbol in the subframe structure to which the short TTI belongs.

In specific implementation, the number of symbols occupied by the short TTI may be 2, 3, 4, or 7 symbols, and certainly, the number of symbols occupied by the short TTI may also be the number of symbols included in other normal subframes smaller than 1 ms. For example, in the LTE communication system, the number of symbols occupied by the short TTI may be 2, 3, 4, 7 OFDM symbols or SC-FDMA symbols, and of course, the number of symbols occupied by the short TTI may also be the number of symbols included in other normal subframes smaller than 1 ms.

When the number of symbols occupied by the short TTI is 2 symbols or 3 symbols, the structure diagram of the subframe structure to which the short TTI belongs can be seen in fig. 5.

As can be seen from fig. 5, one subframe to which the short TTI belongs may include 6 consecutive TTIs, and the number of symbols occupied by each TTI is 2 symbols or 3 symbols.

When the number of symbols occupied by the short TTI is 3 symbols or 4 symbols, the structural diagram of the subframe structure to which the short TTI belongs can be seen in fig. 6.

As can be seen from fig. 6, one subframe to which the short TTI belongs may include 4 consecutive TTIs, and the number of symbols occupied by each TTI is 3 symbols or 4 symbols.

When the number of symbols occupied by the short TTI is 7 symbols, the structural diagram of the subframe structure to which the short TTI belongs can be seen in fig. 7.

As can be seen from fig. 7, one subframe to which the short TTI belongs may include 2 consecutive TTIs, and the number of symbols occupied by each TTI is 7 symbols.

As shown in fig. 8, another scheduling transmission method provided in the embodiments of the present invention may include:

s801, a terminal receives a scheduling signaling sent by a base station, wherein the scheduling signaling carries the transmission time interval TTI number N scheduled for the terminal by the base station and the symbol number occupied by each TTI, the TTI is a short TTI, the length of the TTI is less than the symbol number occupied by a subframe, N is a positive integer and N is more than 1.

S802, the terminal determines a reference signal pattern according to the scheduling signaling.

And S803, the terminal sends a reference signal to the base station according to the reference signal pattern.

Optionally, the scheduling signaling sent by the base station may also carry scheduling indication information, where the scheduling indication information is used to indicate the terminal to select a reference signal pattern from a predefined reference pattern set.

In the step S802, when determining the reference signal pattern according to the scheduling signaling, the terminal may directly determine the reference signal pattern according to the number N of TTIs carried in the scheduling signaling and the number of symbols occupied by each TTI; or according to the indication information carried in the scheduling signaling, the reference signal pattern can be selected from the reference pattern set.

The following explains the above method in detail by using several specific embodiments, taking the reference signal as DMRS as an example, based on the subframe structure to which the short TTI shown in fig. 5 belongs.

Carry out two

For a scenario in which the base station continuously schedules 2 uplink TTI transmissions, based on the subframe structure to which the short TTI shown in fig. 5 belongs, it can be determined that there are three different TTIs, as follows:

1. first TTI Structure

In the first TTI structure, the nth TTI occupies 3 symbols, and the (n + 1) th TTI occupies 2 symbols, which are denoted as TTI (3, 2).

2. Second TTI Structure

In the second TTI structure, the nth TTI occupies 2 symbols, and the (n + 1) th TTI occupies 2 symbols, which is denoted as TTI (2, 2).

3. Third TTI Structure

In the third TTI structure, the nth TTI occupies 2 symbols, and the (n + 1) th TTI occupies 3 symbols, which are denoted as TTI (2, 3).

For the first TTI structure in this embodiment, that is, for TTI (3, 2), since this embodiment is a scenario in which a base station continuously schedules 2 uplink TTI transmissions, according to the principle that the number of DMRSs scheduled by symbols occupied by the nth TTI and the (n + 1) th TTI is at most 2 and at least 1, 11 DMRS patterns can be predefined, see TTI (3, 2) in fig. 9, where the predefined 11 DMRS patterns are as follows:

1 st DMRS pattern: DMRSs are transmitted only on the 1 st symbol in the nth TTI, and data are transmitted on the remaining symbols.

2 nd DMRS pattern: DMRSs are transmitted only on the 2 nd symbol in the nth TTI, and data are transmitted on the remaining symbols.

3 rd DMRS pattern: the DMRS is transmitted only on the 3 rd symbol in the nth TTI, and data is transmitted on the remaining symbols.

The 4 th DMRS pattern: DMRSs are transmitted only on the 1 st symbol in the n +1 th TTI, and data are transmitted on the remaining symbols.

DMRS pattern 5: DMRSs are configured only on the 2 nd symbol in the n +1 th TTI, and data are transmitted on the remaining symbols.

DMRS pattern 6: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

The 7 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

DMRS pattern 8: DMRSs are transmitted on the 3 rd symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

9 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

10 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

11 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

For the second TTI structure in this embodiment, that is, for TTI (2, 2), since this embodiment is a scenario in which a base station continuously schedules 2 uplink TTI transmissions, according to the principle that the number of DMRSs scheduled by symbols occupied by the nth TTI and the (n + 1) th TTI is at most 2 and at least 1, 8 DMRS patterns can be predefined, see TTI (2, 2) in fig. 9, where the predefined 8 DMRS patterns are as follows:

3 rd DMRS pattern: DMRSs are transmitted only on the 1 st symbol in the n +1 th TTI, and data is configured on the remaining symbols.

The 4 th DMRS pattern: DMRSs are configured only on the 2 nd symbol in the n +1 th TTI, and data are transmitted on the remaining symbols.

DMRS pattern 5: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

DMRS pattern 6: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

The 7 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

DMRS pattern 8: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

For the third TTI structure in this embodiment, that is, for TTI (2, 3), since this embodiment is a scenario in which a base station continuously schedules 2 uplink TTI transmissions, and since the last symbol of the n +1 th TTI in TTI (2, 3) is also the last symbol of the subframe structure shown in fig. 5, according to the principle that the number of DMRSs scheduled by the symbols occupied in the nth TTI and the n +1 th TTI is at most 2, at least 1, and the last symbol in the n +1 th TTI does not transmit a DMRS, 8 DMRS patterns may be predefined, see TTI (2, 3) in fig. 9, the predefined 8 DMRS patterns are as follows:

1 st DMRS pattern: DMRS is transmitted only on the 1 st symbol in the nth TTI, and the 3 rd symbol in the n +1 th TTI is reserved for possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

2 nd DMRS pattern: DMRS is transmitted only on the 2 nd symbol in the nth TTI, and the 3 rd symbol in the n +1 th TTI is reserved for possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

3 rd DMRS pattern: DMRS is transmitted only on the 1 st symbol in the n +1 th TTI, and the 3 rd symbol in the n +1 th TTI is reserved for a possible SRS, DMRS is not transmitted, and data is configured on the remaining symbols.

The 4 th DMRS pattern: DMRS is transmitted only on the 2 nd symbol in the n +1 th TTI, and the 3 rd symbol in the n +1 th TTI is reserved for a possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

DMRS pattern 5: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and the 3 rd symbol in the n +1 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

DMRS pattern 6: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and the 3 rd symbol in the n +1 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

The 7 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and the 3 rd symbol in the n +1 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

DMRS pattern 8: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and the 3 rd symbol in the n +1 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

In summary, for a scenario in which a base station continuously schedules 2 uplink short TTI transmissions, 11 DMRS patterns are predefined in a pattern set of TTI (3, 2), 8 DMRS patterns are predefined in a pattern set of TTI (2, 2), and 8 DMRS patterns are predefined in a pattern set of TI structure (2, 3), so that in this embodiment, the base station only needs 4 bits of indication information in scheduling signaling to indicate the terminal to select a DMRS pattern from the DMRS pattern set, and does not need to allocate indication signaling for each TTI, thereby reducing overhead of indication signaling.

EXAMPLE III

In order to further reduce the overhead of indication signaling, aiming at the scene that the base station continuously schedules 2 uplink short TTI transmissions, the number of DMRS patterns in the DMRS pattern set can be further reduced.

Specifically, for a scenario in which the base station continuously schedules 2 uplink TTI transmissions, based on the subframe structure to which the short TTI shown in fig. 5 belongs, it may be determined that three different TTI structures exist, as follows:

1. first TTI Structure

2. Second TTI Structure

3. Third TTI Structure

For the first TTI structure in this embodiment, that is, for TTI (3, 2), since this embodiment is a scenario in which a base station continuously schedules 2 uplink TTI transmissions, according to the principle that the number of DMRSs scheduled by symbols occupied by the nth TTI and the (n + 1) th TTI is at most 2 and at least 1, 8 DMRS patterns can be predefined, see TTI (3, 2) in fig. 10, and 11 predefined DMRS patterns are as follows:

The 4 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

DMRS pattern 5: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

DMRS pattern 6: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

The 7 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

DMRS pattern 8: DMRSs are transmitted on the 3 rd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

For the second TTI structure in this embodiment, that is, for TTI (2, 2), since this embodiment is a scenario in which a base station continuously schedules 2 uplink TTI transmissions, according to the principle that the number of DMRSs scheduled by symbols occupied by the nth TTI and the (n + 1) th TTI is at most 2 and at least 1, 8 DMRS patterns can be predefined, see TTI (2, 2) in fig. 10, where the predefined 8 DMRS patterns are as follows:

For the third TTI structure in this embodiment, that is, for TTI (2, 3), since this embodiment is a scenario in which a base station continuously schedules 2 uplink TTI transmissions, and since the last symbol of the n +1 th TTI in TTI (2, 3) is also the last symbol of the subframe structure shown in fig. 5, according to the principle that the number of DMRSs scheduled by the symbols occupied in the nth TTI and the n +1 th TTI is at most 2, at least 1, and the last symbol in the n +1 th TTI does not transmit a DMRS, 8 DMRS patterns may be predefined, see TTI (2, 3) in fig. 10, 8 predefined DMRS patterns, as follows:

In summary, for a scenario in which a base station continuously schedules 2 uplink short TTI transmissions, 8 DMRS patterns are predefined in a pattern set for TTI (3, 2), 8 DMRS patterns are predefined in a pattern set for TTI (2, 2), and 8 DMRS patterns are predefined in a pattern set for TI structure (2, 3), so that in this embodiment, the base station only needs 3 bits of indication information in scheduling signaling to instruct the terminal to select a DMRS pattern from the DMRS pattern set, instead of transmitting the indication signaling for each TTI, thereby further reducing overhead of the indication signaling.

Example four

For a scenario in which the base station continuously schedules 3 uplink TTI transmissions, based on the subframe structure to which the short TTI shown in fig. 5 belongs, it can be determined that two different TTI structures exist, as follows:

1. first TTI Structure

In the first TTI structure, the nth TTI occupies 3 symbols, the (n + 1) th TTI occupies 2 symbols, and the (n + 2) th TTI occupies 2 symbols, which are denoted as TTI (3, 2, 2).

2. Second TTI Structure

In the second TTI structure, the nth TTI occupies 2 symbols, the (n + 1) th TTI occupies 2 symbols, and the (n + 2) th TTI occupies 3 symbols, which are denoted as TTI (2, 2, 3).

For the first TTI structure in this embodiment, that is, for TTI (3, 2, 2), since this embodiment is a scenario in which a base station continuously schedules 3 uplink TTI transmissions, according to the principle that the number of DMRSs scheduled by symbols occupied by the nth TTI, the n +1 th TTI, and the n +2 th TTI is at most 3 and at least 1, 31 DMRS patterns can be predefined, which are shown in TTI (3, 2, 2) in fig. 11, and 31 predefined DMRS patterns are as follows:

DMRS pattern 5: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

DMRS pattern 6: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

The 7 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

DMRS pattern 8: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

9 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

10 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

11 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

12 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

13 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and data are transmitted on the remaining symbols.

14 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

15 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

16 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

17 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

18 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

19 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

20 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

The 21 st DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

22 nd DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

The 23 rd DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

24 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

25 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

The 26 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

27 th DMRS pattern: DMRSs are transmitted on the 3 rd symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and data are transmitted on the remaining symbols.

The 28 th DMRS pattern: DMRSs are transmitted only on the 1 st symbol in the n +1 th TTI, and data are transmitted on the remaining symbols.

DMRS pattern 29: DMRS is transmitted only on the 2 nd symbol in the n +1 th TTI, and data is transmitted on the remaining symbols.

30 th DMRS pattern: DMRSs are transmitted only on the 1 st symbol in the n +2 th TTI, and data are transmitted on the remaining symbols.

31 st DMRS pattern: DMRS is transmitted only on the 2 nd symbol in the n +2 nd TTI, and data is transmitted on the remaining symbols.

For the second TTI structure in this embodiment, that is, for TTI (2, 2, 3), since this embodiment is a scenario in which a base station continuously schedules 3 uplink TTI transmissions, and since the last symbol of the n +2 th TTI in TTI (2, 2, 3) is also the last symbol of the subframe structure shown in fig. 5, according to the principle that the number of DMRSs scheduled by the symbols occupied in the nth TTI, the n +1 th TTI, and the n +2 th TTI is at most 3, at least 1, and the last symbol in the n +2 th TTI does not transmit DMRSs, 26 DMRS patterns may be predefined, see TTI (2, 2, 3) in fig. 11, the predefined 26 DMRS patterns are as follows:

1 st DMRS pattern: DMRS is transmitted only on the 1 st symbol in the nth TTI, and the 3 rd symbol in the n +2 th TTI is reserved for possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

2 nd DMRS pattern: DMRS is transmitted only on the 2 nd symbol in the nth TTI, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

3 rd DMRS pattern: DMRS is transmitted only on the 1 st symbol in the n +1 th TTI, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

The 4 th DMRS pattern: DMRS is transmitted only on the 2 nd symbol in the n +1 th TTI, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

DMRS pattern 5: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

DMRS pattern 6: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

The 7 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 2 nd symbol in the n +1 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

DMRS pattern 8: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 1 st symbol in the n +1 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

9 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

10 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

11 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the n +1 th TTI and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

12 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the n +1 th TTI and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

13 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI and the 2 nd symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

14 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI and the 2 nd symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

15 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the n +1 th TTI and the 2 nd symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

16 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the n +1 th TTI and the 2 nd symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

17 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

18 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

19 th DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

20 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

The 21 st DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

22 nd DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

The 23 rd DMRS pattern: DMRSs are transmitted on the 2 nd symbol in the nth TTI, the 2 nd symbol in the n +1 th TTI, and the 2 nd symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

24 th DMRS pattern: DMRSs are transmitted on the 1 st symbol in the nth TTI, the 1 st symbol in the n +1 th TTI, and the 1 st symbol in the n +2 th TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

25 th DMRS pattern: DMRS is transmitted only on the 1 st symbol in the n +2 th TTI, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

The 26 th DMRS pattern: DMRS is transmitted only on the 2 nd symbol in the n +2 th TTI, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRS is not transmitted, and data is transmitted on the remaining symbols.

In summary, for a scenario in which a base station continuously schedules 3 uplink short TTI transmissions, 31 DMRS patterns are predefined in a pattern set for TTI (3, 2, 2), and 26 DMRS patterns are predefined in a pattern set for TTI (2, 2, 3), so in this embodiment, the base station only needs 5 bits of indication information in scheduling signaling to indicate the terminal to select a DMRS pattern from the DMRS pattern set, instead of transmitting the indication signaling for each TTI, thereby reducing overhead of the indication signaling.

EXAMPLE five

In order to further reduce the overhead of the indication signaling, the base station may also not send scheduling indication information to the terminal, and the terminal may directly determine the reference signal pattern based on a predefined reference signal pattern.

In the following scenario in which the base station continuously schedules 2 uplink short TTI transmissions, based on the subframe structure to which the short TTI shown in fig. 5 belongs, it can be determined that there are three different TTI structures, as follows:

1. first TTI Structure

2. Second TTI Structure

3. Third TTI Structure

For the first TTI structure in this embodiment, that is, for TTI (3, 2), the number of DMRSs scheduled by using symbols occupied by the nth TTI and the (n + 1) th TTI is at most 2 and at least 1, only one DMRS pattern is predefined, see TTI (3, 2) in fig. 12, and one DMRS pattern predefined for TTI (3, 2) is as follows:

DMRS pattern corresponding to TTI (3, 2): DMRSs are transmitted only on the 1 st symbol in the nth TTI, and data are transmitted on the remaining symbols.

Therefore, after the terminal determines that two uplink short TTIs need to be continuously transmitted and the corresponding structure is TTI (3, 2) according to the scheduling signaling sent by the base station, the terminal can directly use the DMRS pattern corresponding to the predefined TTI (2, 3) for transmission, and the terminal can directly use the corresponding DMRS pattern for transmission according to the determined number of TTIs and the structure of TTIs, so that the base station is not required to transmit indication signaling for each TTI, and the overhead of the indication signaling can be further reduced.

For the second TTI structure in this embodiment, that is, for TTI (2, 2), only one DMRS pattern is predefined, based on the principle that the number of DMRSs scheduled by symbols occupied by the nth TTI and the (n + 1) th TTI is at most 2 and at least 1, see TTI (2, 2) in fig. 12, and one DMRS pattern predefined for TTI (2, 2) is as follows:

DMRS pattern corresponding to TTI (2, 2): DMRSs are transmitted only on the 1 st symbol in the nth TTI, and data are transmitted on the remaining symbols.

Therefore, after the terminal determines that two uplink short TTIs need to be continuously transmitted and the corresponding structure is TTI (2, 2) according to the scheduling signaling sent by the base station, the terminal can directly use the DMRS pattern corresponding to the predefined TTI (2, 2) for transmission, and the terminal can directly use the corresponding DMRS pattern for transmission according to the determined number of TTIs and the structure of TTIs, so that the base station is not required to transmit indication signaling for each TTI, and the overhead of the indication signaling can be further reduced.

For the third TTI structure in this embodiment, i.e. for TTI (2, 3), only one DMRS pattern is predefined, see TTI (2, 3) in fig. 12, one DMRS pattern predefined for TTI (2, 3), as follows:

DMRS pattern corresponding to TTI (2, 3): DMRSs are transmitted only on the 1 st symbol in the nth TTI, and data are transmitted on the remaining symbols.

Therefore, after the terminal determines that two uplink short TTIs are required to be continuously transmitted and the corresponding structure is TTI (2, 3) according to the scheduling signaling sent by the base station, the terminal can directly use the DMRS pattern corresponding to the predefined TTI (2, 3) for transmission, and the terminal can directly use the corresponding DMRS pattern for transmission according to the determined number of TTIs and the structure of TTIs, so that the base station is not required to transmit indication signaling for each TTI, and the overhead of the indication signaling can be further reduced.

EXAMPLE six

In the following scenario where the base station continuously schedules 3 uplink short TTI transmissions, based on the subframe structure to which the short TTI shown in fig. 5 belongs, it can be determined that two different TTI structures exist, as follows:

1. first TTI Structure

2. Second TTI Structure

For the first TTI structure in this embodiment, that is, for TTI (3, 2, 2), the number of DMRS scheduled according to the symbols occupied by the nth TTI, the (n + 1) th TTI, and the (n + 2) th TTI is at most 3, and at least 1, only one DMRS pattern is predefined, see TTI (3, 2, 2) in fig. 13, and one DMRS pattern predefined for TTI (3, 2, 2) is as follows:

DMRS pattern corresponding to TTI (3, 2, 2): DMRSs are transmitted on the 1 st symbol and the 2 nd symbol of the n +1 st and data are transmitted on the remaining symbols in the nth TTI, respectively.

Therefore, after the terminal determines that three uplink short TTIs are required to be continuously transmitted and the corresponding structure is TTI (3, 2, 2) according to the scheduling signaling sent by the base station, the terminal can directly use the DMRS pattern corresponding to the predefined TTI (3, 2, 2) for transmission, and the terminal can directly use the corresponding DMRS pattern for transmission according to the determined number of TTIs and the structure of TTIs, so that the base station is not required to transmit indication signaling for each TTI, and the overhead of the indication signaling can be further reduced.

For the second TTI structure in this embodiment, that is, for TTI (2, 2, 3), since this embodiment is a scenario in which a base station continuously schedules 3 uplink TTI transmissions, and since the last symbol of the n +2 th TTI in TTI (2, 2, 3) is also the last symbol of the subframe structure shown in fig. 5, only one DMRS pattern is predefined according to the principle that the symbols occupied by the nth TTI, the n +1 th TTI, and the n +2 th TTI schedule at most 3 DMRS, at least 1 DMRS, and the last symbol in the n +2 th TTI does not transmit a DMRS, as shown in TTI (2, 2, 3) in fig. 13, one DMRS pattern predefined for TTI (2, 2, 3), as follows:

DMRS pattern corresponding to TTI (3, 2, 2): DMRSs are transmitted on the 1 st symbol and the 1 st symbol of n +2 in the nth TTI, respectively, and the 3 rd symbol in the n +2 th TTI is reserved for a possible SRS, DMRSs are not transmitted, and data are transmitted on the remaining symbols.

As can be seen from the above description, in the embodiment of the present invention, when the base station schedules multiple TTIs, for a certain number of TTIs and a certain TTI structure, a corresponding reference signal pattern set may be predefined, at this time, the base station only needs to transmit scheduling indication information and does not need to transmit indication signaling for each TTI, the terminal first determines the reference signal pattern set according to the certain number of TTIs and the certain TTI structure, and then selects a reference signal pattern from the reference signal pattern set based on the scheduling indication information, and sends a reference signal to the base station based on the determined reference signal pattern, so that overhead of indication signaling can be reduced. And aiming at the determined number of TTIs and the determined TTI structure, only one reference signal pattern can be predefined, at the moment, the base station does not need to transmit scheduling indication information or transmit indication signaling aiming at each TTI, the terminal directly determines the reference signal pattern according to the determined number of TTIs and the determined TTI structure and transmits the reference signal to the base station based on the determined reference signal pattern, and therefore the overhead of the indication signaling can be reduced. The reference signal pattern is directly determined, and the reference signal is transmitted to the base station based on the determined reference signal pattern, so that the overhead of the indication signaling can be further reduced.

Based on the same technical concept, an embodiment of the present invention further provides a base station, as shown in fig. 14, where the base station may include:

a first determining module 1401, configured to determine, according to a resource scheduling request sent by a terminal, a transmission time interval TTI number N scheduled for the terminal and a symbol number occupied by each TTI, where the TTI is a short TTI and a length of the TTI is less than a symbol number occupied by a subframe, N is a positive integer and N is greater than 1;

a first receiving module 1402, configured to receive a reference signal sent by the terminal based on the reference signal pattern.

Preferably, the first determining module 1401 is specifically configured to:

An embodiment of the present invention further provides a terminal, as shown in fig. 15, where the terminal includes:

a second receiving module 1501, configured to receive a scheduling signaling sent by a base station, where the scheduling signaling carries a transmission time interval TTI number N scheduled by the base station for the terminal and a symbol number occupied by each TTI, where the TTI is a short TTI, a length of the TTI is less than a symbol number occupied by a subframe, N is a positive integer, and N is greater than 1;

a second determining module 1502, configured to determine a reference signal pattern according to the scheduling signaling;

a sending module 1503, configured to send a reference signal to the base station according to the reference signal pattern.

Preferably, the second determining module 1502 is specifically configured to:

Various aspects are described herein in connection with a terminal and/or a base station. Terminals, devices (devices) that provide voice and/or data connectivity to a user, including wireless terminals or wired terminals. The wireless terminal may be a handheld device having wireless connection capabilities, or other processing device connected to a wireless modem, a mobile terminal communicating with one or more core networks via a radio access network. For example, wireless terminals may be mobile telephones (or "cellular" telephones) and computers with mobile terminals. As another example, a wireless terminal may be a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device. As another example, a wireless terminal may be a mobile station (mobile station), an access point (access point), or a part of a User Equipment (UE).

The communication system applicable to the embodiment of the invention includes but is not limited to: global System for Mobile communications (GSM), Code Division Multiple Access (CDMA) IS-95, Code Division Multiple Access (CDMA) 2000, Time Division Synchronous Code Division Multiple Access (TD-SCDMA), Wideband Code Division Multiple Access (WCDMA), Time Division duplex-Long Term Evolution (TDD LTE), Frequency Division duplex-Long Term Evolution (FDD), Long Term Evolution (Long Term Evolution-Evolution), LTE-Mobile, Personal Mobile phone (WiFi-held), Wireless internet protocol (WiFi-802), Wireless internet protocol (WiFi-11), WiMAX), and various wireless communication systems that evolve in the future.

To sum up, the scheduling transmission method and the base station provided by the embodiment of the present invention include: a base station determines the number N of Transmission Time Intervals (TTI) scheduled for a terminal and the number of symbols occupied by each TTI according to a resource scheduling request sent by the terminal, wherein the TTI is a short TTI, the length of the TTI is less than the number of symbols occupied by a subframe, N is a positive integer and N is more than 1; the base station determines a reference signal pattern of the terminal according to the number N of the TTIs and the number of symbols occupied by each TTI; and the base station receives the reference signal sent by the terminal based on the reference signal pattern. It can be seen that the base station can directly determine the reference signal pattern of the terminal according to the number N of TTIs and the number of symbols occupied by each TTI, and receive the reference signal sent by the terminal based on the reference signal pattern, without allocating indication signaling for each TTI, thereby reducing the overhead of the indication signaling.

The scheduling transmission method and the terminal provided by the embodiment of the invention comprise the following steps: a terminal receives a scheduling signaling sent by a base station, wherein the scheduling signaling carries the transmission time interval TTI quantity N scheduled for the terminal by the base station and the symbol quantity occupied by each TTI, the TTI is a short TTI, the length of the TTI is less than the symbol quantity occupied by a subframe, N is a positive integer and N is more than 1; the terminal determines a reference signal pattern according to the scheduling signaling; and the terminal sends a reference signal to the base station according to the reference signal pattern. Therefore, the base station does not need to allocate the indication signaling for each TTI, and the overhead of the indication signaling can be reduced.

It should be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for scheduling transmissions, comprising:

the base station determines the number X of TTIs to be scheduled according to the number of symbols occupied by the short TTI and the subframe structure to which the short TTI belongs, wherein X is a positive integer and is greater than 1;

the base station sets a Y reference signal pattern according to a reference signal setting rule aiming at the number of symbols occupied by each TTI in X TTIs, wherein the reference signal setting rule is that at most one symbol is set in each TTI to transmit a reference signal, at least one symbol is set in the X TTIs to transmit the reference signal, Y is a positive integer and Y is more than 1;

the base station predefines a reference signal pattern set according to the set Y reference signal pattern;

the base station generates scheduling indication information according to the reference signal pattern and sends the scheduling indication information to the terminal, wherein the scheduling indication information is used for indicating the terminal to select the reference signal pattern from the reference pattern set;

2. The method of claim 1, wherein the reference signal setting rule further comprises:

3. A method for scheduling transmissions, comprising:

the scheduling signaling further comprises scheduling indication information, wherein the scheduling indication information is used for indicating the terminal to select a reference signal pattern from a predefined reference pattern set; the terminal selects a reference signal pattern from the reference pattern set according to the scheduling indication information;

the set of reference signal patterns is predefined by:

predefining a reference signal pattern set according to the set Y reference signal patterns;

4. A base station, comprising:

the method comprises the steps of determining the number X of TTIs to be scheduled according to the number of symbols occupied by the short TTI and the subframe structure to which the short TTI belongs, wherein X is a positive integer and is greater than 1; setting a Y reference signal pattern according to a reference signal setting rule aiming at the number of symbols occupied by each TTI in X TTIs, wherein the reference signal setting rule is that at most one symbol is set in each TTI to transmit a reference signal, at least one symbol is set in the X TTIs to transmit the reference signal, Y is a positive integer and Y is more than 1; predefining a reference signal pattern set according to the set Y reference signal patterns;

the terminal is also used for determining a reference signal pattern of the terminal from a predefined reference signal pattern set according to the number N of the TTIs and the number of symbols occupied by each TTI; generating scheduling indication information according to the reference signal pattern and sending the scheduling indication information to the terminal, wherein the scheduling indication information is used for indicating the terminal to select the reference signal pattern from the reference pattern set;

5. The base station of claim 4, wherein the first determining module is specifically configured to:

6. A terminal, comprising:

a second determining module, configured to determine a reference signal pattern of the terminal according to the number N of TTIs and the number of symbols occupied by each TTI; or, the scheduling signaling further includes scheduling indication information, where the scheduling indication information is used to indicate the terminal to select a reference signal pattern from a predefined reference pattern set; selecting a reference signal pattern from the reference pattern set according to the scheduling indication information;

the set of reference signal patterns is predefined by:

determining the number X of TTIs to be scheduled according to the number of symbols occupied by the short TTI and a subframe structure to which the short TTI belongs, wherein X is a positive integer and is greater than 1; setting a Y reference signal pattern according to a reference signal setting rule aiming at the number of symbols occupied by each TTI in X TTIs, wherein the reference signal setting rule is that at most one symbol is set in each TTI to transmit a reference signal, at least one symbol is set in the X TTIs to transmit the reference signal, Y is a positive integer and Y is more than 1; predefining a reference signal pattern set according to the set Y reference signal patterns;