CN109587798A

CN109587798A - Reference signal, the determination method and device of control channel unit, storage medium

Info

Publication number: CN109587798A
Application number: CN201711050997.1A
Authority: CN
Inventors: 石靖; 夏树强; 张雯; 梁春丽; 韩祥辉; 任敏
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-09-29
Filing date: 2017-10-31
Publication date: 2019-04-05
Anticipated expiration: 2037-10-31
Also published as: CN109587798B; WO2019085953A1; CN116600404A

Abstract

The embodiment of the invention provides a kind of reference signals, the determination method and device of control channel unit, storage medium, wherein, the determination method of above-mentioned reference signal includes: to be indicated in N number of Transmission Time Interval of scheduling by predetermined manner, there are reference signals at least one Transmission Time Interval, wherein, N is positive integer, by adopting the above technical scheme, it solves in the related technology, due to the transmission of reference signals in each short time interval, and then the problem for causing the expense of reference signal larger, reduce the expense of reference signal.

Description

Reference signal, method and device for determining control channel unit and storage medium

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for determining a reference signal and a control channel unit, and a storage medium.

Background

Currently, the fourth Generation mobile communication technology (4G), the 4th Generation mobile communication technology, Long Term Evolution (LTE), Long Term Evolution advanced (LTE-Advance/LTE-a), and the fifth Generation mobile communication technology (5G), are faced with more and more demands. From the current development trend, 4G and 5G systems are both researching and supporting the characteristics of mobile broadband enhancement, ultrahigh reliability, ultralow time delay transmission and massive connection.

In order to support the characteristics of ultra-high reliability and ultra-low delay transmission, it is necessary to transmit low-delay and high-reliability services at short transmission time intervals, and to meet the requirement of reaching high reliability within a specified delay requirement range or transmitting a large data packet within a specified delay requirement, it is necessary to support scheduling of a plurality of short transmission time intervals. Multi-subframe scheduling has been supported in LTE/LTE-a systems, and this mechanism can be used for multiple short transmission time interval scheduling. However, if the reference information is transmitted in each of the plurality of scheduled short transmission time intervals, the resource utilization rate is reduced compared to the multi-subframe scheduling, and therefore, the reference signal overhead needs to be reduced, and the reduction of the pilot overhead is not considered in the conventional subframe scheduling process.

In the related art, an effective solution has not been proposed yet to the problem that the overhead of the reference signal is large due to the fact that the reference signal is transmitted in each short time interval.

Disclosure of Invention

The embodiment of the invention provides a reference signal, a method and a device for determining a control channel unit and a storage medium, which are used for at least solving the problem that the reference signal is transmitted in each short time interval in the related art, so that the cost of the reference signal is high.

According to an embodiment of the present invention, there is provided a method for determining a reference signal, including:

indicating the existence of the reference signal in at least one TTI of the scheduled N transmission time intervals TTIs in a preset mode, wherein N is a positive integer.

Optionally, when the position of the reference signal is fixed in a TTI, indicating, in a preset manner, that the reference signal exists in at least one TTI of the N TTIs, the method includes at least one of:

the first method is as follows: in N transmission time intervals TTI, only the first TTI has a reference signal, and the rest TTIs have no reference signal;

the second method comprises the following steps: indicating that one TTI where the reference signal is located is contained in the scheduled N TTIs;

the third method comprises the following steps: indicating whether each TTI of the scheduled N TTIs contains a reference signal;

the method is as follows: indicating that at most K TTIs in which the reference signal is located are contained in the scheduled N TTIs, wherein K is a positive integer smaller than N;

the fifth mode is as follows: indicating whether reference signals are carried in the rest TTIs except the first TTI and positions of the reference signals in the scheduled N TTIs, wherein the first TTI always has the reference signals and indicating whether another TTI contains the reference signals and the position of the other TTI containing the reference signals;

the method six: by indicating the reference signal pattern in N TTIs, wherein,

the reference signal pattern is a set of patterns for a scheduling TTI number x,

or the reference signal pattern simultaneously carries scheduling TTI number information,

or the reference signal pattern simultaneously carries feedback Acknowledgement (ACK)/Negative Acknowledgement (NACK) timing information.

Optionally, when there is a reference signal in 2 or more than 2 TTIs of the N TTIs, the types of the reference signal are the same.

Optionally, when there is a reference signal in 2 or more than 2 TTIs of the N TTIs, when TTI types are different, the type of the reference signal is the same.

Optionally, the fifth mode is realized by one of the following modes:

indicating the positions of 1 TTI containing the reference signal in the rest TTIs except the first TTI in the N TTIs;

the use of 1bit indicates whether there is another TTI containing reference signals in the N TTIs other than the first TTI.

Optionally, the method further comprises:

when there is another TTI containing a reference signal, the TTI position is fixed at the last of the scheduled N TTIs.

Optionally, in the downlink transmission process, the supporting the PDSCH to use unused resources of the PDCCH includes at least one of the following cases:

in N TTIs, only the first TTI supports the PDSCH to use unused resources of the PDCCH;

when N >1, PDSCH is not supported to use unused resources of PDCCH;

when N is 1, supporting the PDSCH to use unused resources of the PDCCH;

in N TTIs, all TTIs reuse the same unused resources of the PDCCH as the first TTI.

Optionally, the timing of feeding back ACK/NACK to the data carried in N TTIs is determined according to a reference signal position, and the determining method includes at least one of the following manners:

mode 1: when only 1 TTI in the plurality of TTIs contains the reference signal, when the timing corresponding to the feedback ACK/NACK when the first TTI contains the reference signal is k1, and the timing corresponding to the feedback ACK/NACK when the non-first TTI contains the reference signal is k2, k1< k2 is satisfied;

mode 2: when more than 1 TTI in the plurality of TTIs contains the reference signal, when the timing corresponding to the feedback ACK/NACK when the last TTI contains the reference signal is k3 and the timing corresponding to the feedback ACK/NACK when the last TTI does not contain the reference signal is k4, k3> k4 is satisfied;

wherein k1, k2, k3 and k4 are all positive numbers.

Optionally, when the position of the reference signal is not fixed in a TTI, indicating, in a preset manner, that there is a reference signal in at least one TTI of the N TTIs, and the position of the reference signal is not fixed in the TTI, including at least one of:

the first method is as follows: the method comprises the steps of indicating a reference signal pattern of a first TTI in N TTIs, wherein the reference signal pattern is consistent with a reference signal pattern during single TTI scheduling;

the second method comprises the following steps: indicating one TTI in N TTIs and a reference signal pattern in the TTI, wherein the reference signal pattern is consistent with a reference signal pattern during single TTI scheduling;

the third method comprises the following steps: indicating a reference signal pattern of at most K TTIs in the N TTIs, wherein the reference signal pattern is consistent with a reference signal pattern during single TTI scheduling, and K is a positive integer smaller than N;

the method is as follows: the method comprises the steps of indicating a reference signal pattern of each TTI in N TTIs, wherein the reference signal pattern is consistent with a reference signal pattern during single TTI scheduling;

the fifth mode is as follows: indicating whether the rest TTIs except the first TTI bear the reference signal and the position of the reference signal in the scheduled N TTIs, wherein the first TTI always has the reference signal, indicating whether another TTI contains the reference signal and the position of another TTI containing the reference signal and indicating the position of the reference signal in the TTI;

the method six: by indicating the reference signal pattern in N TTIs, where,

or the reference signal pattern simultaneously carries feedback ACK/NACK timing information;

wherein the position of the reference signal is fixed in the TTI.

Optionally, the fifth mode is realized by one of the following modes:

indicating the positions of 1 transmission time interval containing the reference signal in the rest transmission time intervals except the first transmission time interval in the N transmission time intervals and indicating the position of the reference signal in the transmission time interval;

indicating whether another transmission time interval, except the first transmission time interval, exists in the N transmission time intervals, including the reference signal and indicating the position of the reference signal in the transmission time interval.

Optionally, the method further comprises:

According to another embodiment of the present invention, there is also provided a method for determining a reference signal, including:

determining that a reference signal exists in at least one transmission time interval in every N transmission time intervals in the SPS transmission in a preset mode, wherein N is a positive integer.

Optionally, the time domain position of the reference signal is fixed in the transmission time interval, and the preset manner at least includes one of:

the first method is as follows: predefining in every N transmission time intervals, only the first transmission time interval has a reference signal;

the second method comprises the following steps: indicating whether the reference signal density is reduced in every N transmission time intervals through signaling, wherein the reference signal density is not reduced, namely the N transmission time intervals all contain the reference signals, and the reference signal density is reduced, namely the reference signals are contained in less than N transmission time intervals;

the third method comprises the following steps: the reference signal pattern in every N transmission time intervals is signaled.

Optionally, the reference signal density is reduced by at least one of: there is a reference signal only in the first transmission time interval; there is only a reference signal in the first and last transmission time interval; there is a reference signal in only the first sum and x transmission time intervals offset from the first, where x is an integer taken from the set [0, N ].

Optionally, the time domain position of the reference signal is not fixed in the transmission time interval, and the preset manner at least includes at least one of:

the first method is as follows: predefining in every N transmission time intervals, all of the N transmission time intervals containing a reference signal;

the second method comprises the following steps: predefining in every N transmission time intervals, only the first transmission time interval has a reference signal;

the third method comprises the following steps: indicating whether the reference signal density is reduced in every N transmission time intervals through signaling, wherein the reference signal density is not reduced, namely the N transmission time intervals all contain the reference signals, and the reference signal density is reduced, namely the reference signals are contained in less than N transmission time intervals;

the method is as follows: the reference signal pattern in every N transmission time intervals is signaled.

Optionally, in every N transmission time intervals, only the first OFDM symbol in the transmission time interval containing the reference signal contains the reference signal.

Optionally, the transmission time interval in which the first traffic transmission activating the SPS transmission is located contains a reference signal.

Optionally, when the signaling is a physical layer signaling, the signaling is valid only in a period of 1 transmission time interval, and in other periods, all bits corresponding to the signaling are set to 0 for SPS transmission activation acknowledgement or SPS transmission deactivation acknowledgement; or have different meanings when the period is 1 transmission time interval and other periods, respectively, wherein the period is 1 transmission time interval valid and used for the reference signal indication in every N transmission time intervals, and the other periods are used for the reference signal indication of a single transmission time interval.

Optionally, the method is applied to semi-persistent scheduling SPS and SPS periodicity is 1 transmission time interval.

According to another embodiment of the present invention, there is also provided a method for determining a semi-persistent scheduling SPS transmission time, including:

indicating SPS period, deviant and transmission time interval length to be jointly coded through high-level signaling, wherein the transmission time interval length is jointly coded with the SPS period and the deviant; or indicating the SPS period and the offset value through a high-level signaling, and simultaneously enabling the physical layer signaling of the SPS transmission to be positioned at the limited transmission time; or the SPS period is informed through a high-level signaling, the SPS transmission physical layer signaling is activated to be positioned at the limited transmission time, and the offset value and the transmission time interval length are jointly coded and indicated;

determining an SPS transmit time by indicating one of: SPS period, offset value, and transmission time interval length; an SPS period and an offset value; offset value and transmission time interval length.

Optionally, the limited transmission time includes at least one of: the ue is located only in a Physical Downlink Control CHannel (PDCCH), only in a short transmission time interval #0 and/or a short transmission time interval #3, and only in a Control resource set configured in a timeslot, where the resource set is located in the first P symbols in the timeslot and only in the first Control resource set in a time domain of a plurality of Control resource sets configured in the timeslot, where the P value includes: 1,2,3,7.

Optionally, the joint encoding comprises at least: the SPS period and the offset are uniformly indicated, and the offset value quantity of each period is the number of 1 short transmission time interval or 1 service time length contained in the SPS period; or the number of values of the offset value for each period is less than or equal to the number of the SPS period containing 1 short transmission time interval or 1 service duration.

According to another embodiment of the present invention, there is also provided a method for determining a control channel element, including:

selecting partial resource unit groups from the N resource unit groups to form a control channel unit, and forming the control channel unit at least in one of the following modes:

for a physical downlink control channel PDCCH based on a demodulation reference signal, when the mapping between a control channel element CCE and a resource element group REG is distributed mapping, at least the following principles are satisfied: forming a CCE by taking M REGs as a group and discretely forming the group at equal intervals or intervals in a frequency domain, wherein M is the number of REGs contained in K RBs in a TTI, K is a positive integer, and N is a positive integer;

for a physical downlink control channel PDCCH based on a cell reference signal, when the mapping between a control channel element CCE and a resource element group REG is distributed mapping, at least the following principles are satisfied: a group of REGs that are equally or intermittently discrete in the frequency domain constitute one CCE in a single symbol.

Optionally, when the mapping between the control channel element CCE and the resource element group REG is localized mapping, a group of REGs consecutive in the frequency domain in a single symbol constitutes one CCE, and an interleaving method or physical layer signaling is used to indicate an aggregation level, or information of different aggregation levels is scrambled differently.

Optionally, the set of REGs that are equally spaced or discretely spaced in the frequency domain in a single symbol form a CCE, and when the set of REGs is used for a short physical downlink control channel, sPDCCH, the sREG index that forms the sCCE # n is at least one of the following manners:

the first method is as follows:

the second method comprises the following steps:

wherein N is 0, …, N_sCCE,p-1 and N_sCCE,pRepresents the number of scces in the control channel resource block set p,and isRepresents the number of sREGs contained in each sCCE,represents the number of sregs contained in each OFDM symbol in the control channel resource block set p.

Optionally, the interleaving method includes: for a candidate set with an aggregation level L, sequentially writing REG indexes contained in the candidate set into an interleaver, reading the REG indexes from the interleaver according to a column permutation pattern, and deleting empty elements after reading the REG indexes, wherein the REG indexes are defined as the empty elements when being larger than X;

wherein L ═ 1,2,4, or 8;

where X ═ L · M-1, M denotes the number of REGs contained in each CCE.

Optionally, the column permutation pattern comprises at least one of:

<1,17,9,25,5,21,13,29,3,19,11,27,7,23,15,31,0,16,8,24,4,20,12,28,2,18,10,26,6,22,14,30>；

<0,4,8,12,16,20,24,28,1,5,9,13,17,21,25,29,2,6,10,14,18,22,26,30,3,7,11,15,19,23,27,31>。

according to another embodiment of the present invention, there is also provided a reference signal determining apparatus including:

the apparatus includes a first indication module configured to indicate, in a preset manner, that a reference signal exists in at least one of N scheduled TTI, where N is a positive integer.

According to another embodiment of the present invention, there is also provided a control channel unit determining apparatus, including:

a selecting module, configured to select a part of resource element groups from the N resource element groups to form a control channel element, and form a control channel element at least in one of the following manners:

the SPS receiver comprises a first determining module, configured to determine, in a preset manner, that a reference signal exists in at least one transmission time interval of every N transmission time intervals in SPS transmission, where N is a positive integer.

According to another embodiment of the present invention, there is also provided an apparatus for determining SPS transmit time, including:

the indication module is used for indicating the SPS period, the offset value and the transmission time interval length joint coding through the high-level signaling joint coding; or indicating the SPS period and the offset value through a high-level signaling, and simultaneously enabling the physical layer signaling of the SPS transmission to be positioned at the limited transmission time; or the SPS period is informed through a high-level signaling, the SPS transmission physical layer signaling is activated to be positioned at the limited transmission time, and the offset value and the transmission time interval length are jointly coded and indicated;

a second determining module for determining the SPS transmit time by indicating one of: SPS period, offset value, and transmission time interval length; an SPS period and an offset value; offset value and transmission time interval length.

According to another embodiment of the present invention, there is also provided a storage medium including a stored program, wherein the program executes a method of determining a reference signal or a method of determining a control channel element when running.

According to the invention, the reference signal exists in at least one TTI in the scheduled N transmission time intervals TTI can be indicated in a preset mode, and the reference signal does not exist in each TTI in the N transmission time intervals TTI, so that the problem that in the related technology, the reference signal is transmitted in each short time interval, and the cost of the reference signal is large is solved, and the cost of the reference signal is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of a method of determining a reference signal according to an embodiment of the present invention;

fig. 2 is a block diagram of a structure of a reference signal determination apparatus according to an embodiment of the present invention;

FIG. 3 is a flow chart of a method of determination of a control channel element according to an embodiment of the invention;

fig. 4 is a block diagram of a structure of a determination apparatus of a control channel unit according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a downlink sTTI according to an alternative embodiment of the present invention;

fig. 6 is a schematic structural diagram of an uplink sTTI according to an alternative embodiment of the present invention;

FIG. 7 is a schematic illustration of centralized mapping and distributed mapping in accordance with an alternative embodiment of the present invention;

FIG. 8 is another schematic diagram of centralized mapping and distributed mapping in accordance with an alternative embodiment of the present invention;

fig. 9 is still another flowchart of a method of determining a reference signal according to an embodiment of the present invention;

FIG. 10 is a flow chart of a method for determining SPS transmission times in accordance with an embodiment of the invention;

fig. 11 is another block diagram of the structure of the apparatus for determining a reference signal according to the embodiment of the present invention;

fig. 12 is a block diagram of a device for determining SPS transmit time according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Example 1

In this embodiment, a method for determining a reference signal is provided, and fig. 1 is a flowchart of a method for determining a reference signal according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

step S102, indicating, in a preset manner, that a reference signal exists in at least one of N scheduled transmission time intervals, where N is a positive integer.

According to the invention, the reference signal exists in at least one TTI in the scheduled N transmission time intervals TTI through the preset indication, so that the reference signal does not exist in each TTI in the N transmission time intervals TTI, the problem that in the related technology, the reference signal is transmitted in each short time interval, so that the cost of the reference signal is large is solved, and the cost of the reference signal is reduced.

Although the embodiment of the present invention defines that the reference signal exists in at least one TTI of the N TTIs, in order to better solve the technical problem, at least one TTI is indicated in a preset manner, and the reference signal exists in less than or equal to N TTIs.

Optionally, when the position of the reference signal is fixed in a TTI, indicating that the reference signal exists in at least one TTI in the N transmission time intervals in a preset manner, the position of the reference signal is fixed in the TTI, and the position of the reference signal includes at least one of:

the method six: by indicating the reference signal pattern in N TTIs, wherein,

or the reference signal pattern simultaneously carries feedback ACK/NACK timing information.

It should be noted that the implementation manners of the first to sixth manners may be applied to a downlink transmission process, and may also be applied to an uplink transmission process, which is not limited in this embodiment of the present invention. The first to sixth preferred modes are used for a scenario where the position of the reference signal is fixed in the TTI.

Optionally, when reference signals exist in 2 or more than 2 TTIs of the N TTIs, the types of the reference signals are the same when the TTI types are different, in the embodiment of the present invention, the TTI types are different subframe types, such as MBSFN subframes and non-MBSFN subframes; or the TTI type is a slot type of different slots, such as a slot composed of a pure downlink slot, a pure uplink slot, a downlink portion + a reserved portion + an uplink portion.

Optionally, the fifth mode is realized by one of the following modes:

and using 1bit to indicate whether another TTI except the first TTI in the N TTIs contains the reference signal, and when another TTI contains the reference signal, fixing the position of the TTI at the last of the scheduled N TTIs.

Optionally, the supporting of the physical downlink shared channel PDSCH (which may also be understood as short sPDSCH) using unused resources of the physical downlink control channel pdcch (spdcch) includes at least one of the following cases:

when N >1, PDSCH is not supported to use unused resources of PDCCH;

when N is 1, supporting the PDSCH to use unused resources of the PDCCH;

wherein k1, k2, k3 and k4 are all positive numbers.

Optionally, when the position of the reference signal is not fixed in the TTI, indicating, in a preset manner, that the reference signal exists in at least one TTI of the N TTIs, where the TTI is at least one of:

the method six: by indicating the reference signal pattern in N TTIs, where,

It should be noted that the implementation manners of the first to sixth manners may be applied to an uplink transmission process, and may also be applied to a downlink transmission process, which is not limited in this embodiment of the present invention. The preferable modes one to six are used for a scenario in which the position of the reference signal is not fixed in the TTI.

Optionally, when reference signals exist in 2 or more than 2 TTIs of the N TTIs, when TTI types are different, the types of the reference signals are the same, where the TTI types are different subframe types, such as MBSFN subframes and non-MBSFN subframes; or the TTI type is a slot type of different slots, such as a slot composed of a pure downlink slot, a pure uplink slot, a downlink portion + a reserved portion + an uplink portion.

Optionally, the fifth mode is realized by one of the following modes:

and preferably, 1bit is adopted to indicate whether another transmission time interval, except the first transmission time interval, in the N transmission time intervals contains the reference signal and indicate the position of the reference signal in the transmission time interval.

Optionally, the method further comprises:

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

Example 2

In this embodiment, a device for determining a reference signal is further provided, and the device is used to implement the foregoing embodiments and preferred embodiments, and the description of the device that has been already made is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 2 is a block diagram of a reference signal determination apparatus according to an embodiment of the present invention, as shown in fig. 2, the apparatus including:

a first indicating module 20, configured to indicate, in a preset manner, that a reference signal exists in at least one TTI of N scheduled TTIs, where N is a positive integer.

In an optional embodiment, the first indicating module 20 is further configured to perform at least one of the following operations:

when the position of the reference signal is fixed in the TTI, indicating that the reference signal exists in at least one TTI in the N TTI by a preset mode, wherein the reference signal comprises at least one of the following components:

the method six: by indicating the reference signal pattern in N TTIs, wherein,

or the reference signal pattern simultaneously carries feedback ACK/NACK timing.

Optionally, the fifth mode is realized by one of the following modes:

Optionally, during the downlink transmission, the supporting of the physical downlink shared channel PDSCH (which may also be understood as short sPDSCH) using unused resources of the physical downlink control channel pdcch (spdcch) includes at least one of the following cases:

when N >1, PDSCH is not supported to use unused resources of PDCCH;

when N is 1, supporting the PDSCH to use unused resources of the PDCCH;

wherein k1, k2, k3 and k4 are all positive numbers.

the fifth mode is as follows: indicating whether reference signals are carried and positions of the reference signals are carried in the rest TTIs except the first TTI in the scheduled N TTIs, wherein the first TTI always has the reference signals, and indicating whether another TTI contains the reference signals, the position of the other TTI containing the reference signals and the position of the TTI in the TTI;

the method six: by indicating the reference signal pattern in N TTIs, where,

Optionally, the fifth mode is realized by one of the following modes:

Optionally, the method further comprises:

It should be noted that the implementation manners of the first to fifth manners may be applied to a downlink transmission process, and may also be applied to an uplink transmission process, which is not limited in this embodiment of the present invention.

Example 3

In an embodiment of the present invention, a method for determining a control channel element is further provided, and fig. 3 is a flowchart of the method for determining a control channel element according to the embodiment of the present invention, as shown in fig. 3, the flowchart includes the following steps:

step S302, selecting a part of resource element groups from the N resource element groups to form a control channel element, and forming a control channel element at least by one of the following methods:

Through the above steps, a part of resource element groups are selected from the N resource element groups in the manner of step S302 to form one control channel element, and then a determination scheme of the control channel element can be provided for the physical downlink control channel PDCCH based on the demodulation reference signal and the physical downlink control channel PDCCH based on the cell reference signal, respectively.

Wherein, K preferably takes the values 1,2 and 3.

Optionally, when the mapping between the control channel element CCE and the resource element group REG is localized mapping, a group of REGs consecutive in the frequency domain form one CCE in a single symbol, and in order to avoid that REG resources used at a high aggregation level completely include REG resources used at a low aggregation level, an interleaving method or physical layer signaling is used to indicate the aggregation level, or information at different aggregation levels is scrambled differently.

In an embodiment of the present invention, the interleaving method includes: for a candidate set with an aggregation level L, sequentially writing REG indexes contained in the candidate set into an interleaver, reading the REG indexes from the interleaver according to a column permutation pattern, deleting empty elements after reading the REG indexes, wherein the empty elements are defined when the REG indexes are larger than X,

wherein L ═ 1,2,4, or 8, i.e., L may take one of values 1,2,4, or 8;

where X ═ L · M-1, M denotes the number of REGs contained in each CCE.

Optionally, the column permutation pattern comprises at least one of:

example 4

In this embodiment, a device for determining a control channel unit is further provided, where the device is used to implement the foregoing embodiments and preferred embodiments, and details are not repeated for what has been described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 4 is a block diagram of a structure of a control channel unit determination apparatus according to an embodiment of the present invention, as shown in fig. 4, the apparatus including:

a selecting module 40, configured to select a part of resource element groups from the N resource element groups to form a control channel element, and form a control channel element at least in one of the following manners:

By adopting the technical scheme, part of the resource unit groups are selected from the N resource unit groups to form one control channel unit, and then a determination scheme of the control channel unit can be respectively provided for a physical downlink control channel PDCCH based on a demodulation reference signal and a physical downlink control channel PDCCH based on a cell reference signal.

Example 5

According to an embodiment of the present invention, there is also provided a method for determining a reference signal, as shown in fig. 9, where fig. 9 is another flowchart of the method for determining a reference signal according to the embodiment of the present invention, as shown in fig. 9, including:

step S902: determining that a reference signal exists in at least one transmission time interval in every N transmission time intervals in the SPS transmission in a preset mode, wherein N is a positive integer.

It should be noted that N in the preferred embodiment of the present invention is preferably 2.

the third method comprises the following steps: indicating whether the reference signal density is reduced or not in every N transmission time intervals through signaling, wherein the reference signal density is not reduced, namely the N transmission time intervals all contain the reference signal, the reference signal density is reduced, namely the reference signal is contained in less than N transmission time intervals, and preferably, whether the reference signal density is reduced or not in every N transmission time intervals can be indicated through 1bit signaling;

Example 6

In an embodiment of the present invention, a method for determining a semi-persistent scheduling SPS transmit time is further provided, and fig. 10 is a flowchart of the method for determining an SPS transmit time according to an embodiment of the present invention, as shown in fig. 10, including:

step S1002, indicating an SPS period, an offset value and a transmission time interval length through a high-level signaling, wherein the transmission time interval length, the SPS period and the offset value are jointly coded; or indicating the SPS period and the offset value through a high-level signaling, and simultaneously enabling the physical layer signaling of the SPS transmission to be positioned at the limited transmission time; or the SPS period is informed through a high-level signaling, the SPS transmission physical layer signaling is activated to be positioned at the limited transmission time, and the offset value and the transmission time interval length are jointly coded and indicated;

step S1004, determining the SPS transmit time by indicating one of: SPS period, offset value, and transmission time interval length; an SPS period and an offset value; offset value and transmission time interval length.

Optionally, the limited transmission time includes at least one of: the ue is located only in the PDCCH, only in the short transmission time interval sTTI #0 and/or the short transmission time interval sTTI #3 (i.e. sTTI with index value of 0, 3), and only in the control resource set configured in the slot (slot), where the resource set is located in the first P symbols in the slot, and is only located in the first control resource set in the time domain of the multiple control resource sets configured in the slot, where the P value includes: 1,2,3,7, i.e. P, may have one of the values 1,2,3, 7.

Example 7

Fig. 11 is another block diagram of a reference signal determining apparatus according to an embodiment of the present invention, as shown in fig. 11, the apparatus including:

a first determining module 1102, configured to determine, in a preset manner, that a reference signal exists in at least one transmission time interval of every N transmission time intervals in SPS transmission, where N is a positive integer.

Optionally, in every N transmission time intervals, only the first OFDM symbol in each transmission time interval contains a reference signal.

Example 8

In this embodiment, a device for determining an SPS transmit time is further provided, where the device is used to implement the foregoing embodiments and preferred embodiments, and details are not repeated for what has been described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 12 is a block diagram of a device for determining SPS transmit time according to an embodiment of the present invention, as shown in fig. 12, the device including:

an indication module 1202, configured to indicate, by high-layer signaling joint coding, SPS period, offset value, and tti length joint coding; or indicating the SPS period and the offset value through a high-level signaling, and simultaneously enabling the physical layer signaling of the SPS transmission to be positioned at the limited transmission time; or the SPS period is informed through a high-level signaling, the SPS transmission physical layer signaling is activated to be positioned at the limited transmission time, and the offset value and the transmission time interval length are jointly coded and indicated;

a second determining module 1204 for determining the SPS transmit time by indicating one of: SPS period, offset value, and transmission time interval length; an SPS period and an offset value; offset value and transmission time interval length.

The technical solutions mentioned above are explained below with reference to preferred embodiments 1 to 5, but are not intended to limit the technical solutions of the embodiments of the present invention.

Preferred embodiment 1

And the base station schedules the terminal A to transmit downlink data in a plurality of TTIs. Preferably, the TTI contains a smaller number of OFDM symbols, for example, no more than 7 OFDM symbols, but is not limited thereto. In this embodiment, a short TTI structure in a Long-Term Evolution (LTE) system is used for explanation, that is, the TTI may be understood as a short TTI (short TTI, abbreviated as sTTI), but the invention is not limited thereto. DL short TTI frame structure as shown in fig. 5, 6 DL (downlink) short TTIs are contained in a 1ms subframe, and Pattern1 is used when sPDSCH is configured to start from OFDM symbol #1 or # 3; pattern2 is used when the sPDSCH is configured to start from OFDM symbol # 2. Note that here the OFDM symbol numbering starts from 0, i.e. there are 14 OFDM in a 1ms subframe, numbered sequentially #0 to # 13.

The DCI of the scheduling multi-sTTI can be transmitted in any DL sTTI, and when the DCI is positioned in DL sTTI #0, the DCI is carried by a PDCCH channel; when the DCI is located in DL sTTI #1 to #5, it is carried by sPDCCH channel. Alternatively, DCI scheduling multiple sttis may be transmitted in partial sttis, e.g. only DL sTTI #0, and e.g. only DL sTTI #0, 3.

And when the multi-sTTI transmission is scheduled, the maximum N sTTI transmissions are scheduled. N consecutive sttis then available for transmission of sPDSCH. It should be noted that there is a scenario where sPDSCH cannot be used in sTTI #0, that is, the sPDSCH is configured to start from OFDM symbol #2 or #3, and then sTTI #0 cannot be used for sPDSCH transmission. Preferably, N is 2 or 3 or 4 or 6 or 8 or 12 or 16, but not limited thereto. When it is determined that the maximum number of scheduled N sTTI transmissions is determined, the number of actually scheduled transmissions of the plurality of sTTI is 1 to N sTTI. The determination mode of the N value is predefined or the value configured by a high-level signaling. In the following description, N ═ 4 is taken as an example, and is not limited thereto.

In the scheduled transmission with N ═ 4 DL sTTI, the position of the Demodulation reference signal (DMRS for short, which can also be understood as the reference signal in the above embodiment) is determined in at least one of the following manners: in this embodiment, downlink transmission is taken as an example for description, but the method for determining the location of the DMRS is not limited to downlink, and may be used for uplink. In this embodiment, a scenario in which DMRS is fixed in TTI is preferred.

Mode 1: the default is that DMRS exists in each sTTI;

has the advantages that: no additional indication is needed at this time. Without standardization, the multi-sTTI scheduling mechanism is the same as the eLAA multi-subframe scheduling mechanism. The DMRS overhead is the same as the overhead proportion of single sTTI scheduling, and no saving is realized.

Mode 2: only DMRS is arranged in the first scheduled sTTI by default, and no DMRS is arranged in the rest sTTI;

has the advantages that: no additional indication is needed at this time. DMRS overhead can be saved, and standardization is simple. The method is suitable for non-high-speed moving scenes.

Mode 3: only 1sTTI containing the DMRS in the scheduled N sTTIs is indicated;

in this case, the sTTI including the DMRS is located in any one of the scheduled sTTI, where N is 4 as an example, and when only 1sTTI including the DMRS is considered, 2bit indicates one of 4 sTTI;

has the advantages that: DMRS overhead can be saved, the flexible indication of the sTTI containing the DMRS is not limited to the first of the plurality of sTTI.

Mode 4: indicating that at most N sTTIs in the scheduled N sTTIs contain the DMRS;

at this time, the sTTI containing the DMRS is located at any position in the scheduled multiple sTTI, and at most N sTTI contain the DMRS, taking N ═ 4 as an example, 4 bits indicate that at most 4sTTI contain the DMRS in a bitmap manner;

has the advantages that: DMRS overhead can be saved and the indication overhead is the largest but the most flexible, sTTI containing DMRS can be located at any position and at most N sTTI contain DMRS.

Mode 5: indicating only at most 2 sTTIs of the scheduled plurality of sTTIs in which the DMRS is located;

this indicates that at most 2sTTI of the N sTTI contain DMRS. For example, when N is 4, then 4 bits are needed to indicate a total of 10 possibilitiesThere are 1sTTI containing DMRS (4 possibilities) or 2sTTI containing DMRS (6 possibilities). For another example, when N is 6, then a total of 21 possibilities are indicated by 5 bitsThere are 1sTTI containing DMRS (6 possibilities) or 2sTTI containing DMRS (15 possibilities).

Has the advantages that: and flexibly indicating the sTTI containing the DMRS, at most in any 2sTTI, and indicating that the overhead is equal to or less than mode 4.

Mode 6: and indicating whether the rest sTTI except the first sTTI in the scheduled N sTTI carries the DMRS and the position. And the default first sTTI always has the DMRS, and indicates whether another sTTI contains the DMRS and the position of another sTTI containing the DMRS.

The mode 6 further includes: sub-mode 6-1 and sub-mode 6-2, wherein sub-mode 6-1: the indication contains that the DMRS is located in 1sTTI of the remaining sTTI except the first sTTI. For example, when N is 4, the following table 1 indicates whether another sTTI includes a DMRS and a location of another sTTI including the DMRS using 2 bits.

TABLE 1

2bits indication	Whether the rest sTTI contains DMRS and position
		00	No remaining sTTI contains DMRS
01	The second sTTI contains DMRS
		10	The third sTTI contains DMRS
11	The fourth sTTI contains DMRS

Sub-mode 6-2: using 1bit indicates whether another sTTI contains DMRS. Preferably, the sTTI position is fixed at the last of the scheduled sTTI when there is another sTTI containing the DMRS.

Has the advantages that: DMRS overhead can be saved, and another sTTI containing DMRS can be supported with a smaller indication overhead. The method is suitable for medium and low speed moving scenes and high speed moving scenes. For example: in addition to high-speed scenarios, it is only necessary that a single sTTI contains DMRS in other cases, i.e., the main reason that another sTTI contains DMRS is to support high-speed mobile scenarios.

Mode 7: indicating one of the predefined DMRS patterns. Wherein the predefined DMRS patterns are defined separately for the actual number of scheduled multiple sTTI scheduling, or the predefined DMRS patterns are jointly coded with the number of scheduled sTTI.

Examples are defined for the actual scheduling number of multi-sTTI scheduling by the predefined DMRS pattern: when N-4, the actual number of schedules for at most N-4 sTTI schedules is N-1 or 2 or 3 or 4. As shown in table 2 below, the predefined DMRS pattern sets are defined respectively when different actual scheduling numbers sTTI are used, and according to the actually scheduled number sTTI, a position of the sTTI where the DMRS is located when the n sTTI are actually scheduled, that is, one of the predefined DMRS pattern sets, is indicated. It should be noted that the pilot patterns listed in the table are only examples, but not limited thereto.

TABLE 2

Note: r represents that the sTTI has the DMRS, and D represents that the sTTI has no DMRS. Taking N-2 as an example, RD indicates that the first sTTI has DMRS and the second sTTI has no DMRS. The rest is similar and is not described in detail.

The predefined DMRS pattern and the number of scheduled sTTI are joint coding examples: when N-4, the actual number of schedules for at most N-4 sTTI schedules is N-1 or 2 or 3 or 4. As shown in table 3, at different actual scheduling numbers sTTI, the predefined DMRS pattern sets are joint to the scheduled sTTI number, indicating the number of actual scheduled sTTI and the sTTI position where the DMRS is located, i.e. one of the predefined DMRS pattern sets. It should be noted that the pilot patterns listed in the table are only examples, but not limited thereto.

TABLE 3

Has the advantages that: DMRS overhead can be saved, another sTTI containing DMRS is supported by smaller indication overhead, and a multi-sTTI pilot pattern suitable for multi-sTTI scheduling can be designed. The method is suitable for medium and low speed moving scenes and high speed moving scenes. And joint coding indications may further save control overhead.

In addition, for DL multi-s tti scheduling, the method for supporting sPDSCH to use the sPDCCH without using resources at least includes one of the following methods:

mode 1: when scheduling is carried out in multiple sTTIs, only the sPDSCH supported in the first sTTI uses the unused resource of the sPDCCH.

Considering that the single sTTI scheduling supports that sPDSCH uses resources unused by sPDCCH, the sPDSCH can only support the function for the current sTTI, and cannot predict the sPDCCH resource use condition in the subsequent sTTI, and simultaneously, each sPDSCH scheduled by multiple sTTI is independently coded. It is therefore possible that only the first sTTI supports this functionality. Thus, when the indication is displayed, the unused/usedsCCE indication field is valid only for the first sTTI of the multi-sTTI. Namely, when scheduling is carried out in multiple sTTI, only the first sTTI supports sPDSCH to use the unused resource of the sPDCCH.

Mode 2: this functionality is not supported when multiple sTTI scheduling is used.

I.e. unused sPDCCH resources are reused by sPDSCH scheduled for a single sTTI.

Mode 3: when scheduling is carried out by multiple sTTIs, all sTTIs reuse the same unused sCCE resources as those in the first sTTI.

The limitations that exist at this time are: the sCCE index used by the sDCCH in the same RB set in the subsequent sTTI cannot be larger than the sCCE index used by the sDCCH scheduled by multiple sTTIs in the first sTTI.

Additionally, for multi-TTI scheduling, the feedback timing is implicitly determined from the DMRS location. The feedback timing is timing for performing ACK/NACK for the PDSCH or the PUSCH. Determining the feedback timing of the multi-sTTI scheduling service according to the sTTI position containing the DMRS in the multi-sTTI comprises at least one of the following modes:

mode 1: when only 1 TTI in the plurality of TTIs contains the DMRS, the timing corresponding to feedback ACK/NACK is assumed to be k1 when the first sTTI contains the DMRS, the timing corresponding to feedback ACK/NACK is assumed to be k2 when the non-first sTTI contains the DMRS, and k1 is less than k 2;

mode 2: when more than 1 TTI in the plurality of TTIs contains the DMRS, the timing corresponding to feedback ACK/NACK is assumed to be k3 when the last sTTI contains the DMRS, and the timing corresponding to feedback ACK/NACK is assumed to be k4 when the last sTTI does not contain the DMRS, wherein k3 is more than k 4;

by the technical scheme provided by the preferred embodiment, DMRS overhead can be saved during multi-sTTI scheduling, and one or more sTTIs including the DMRS can be supported by a smaller indication overhead indication, so that the method is suitable for medium and low speed mobile scenes and high speed mobile scenes. And meanwhile, after the overhead of pilot frequency is saved, more resources can be used for data transmission, and the frequency spectrum efficiency of the system is improved.

Preferred embodiment 2

The base station schedules the terminal A to transmit uplink data in a plurality of TTIs, wherein the TTIs contain a small number of OFDM symbols, for example, no more than 7 OFDM symbols. The preferred embodiment is described with a short TTI structure in an LTE system, but is not limited thereto. The ULshort TTI frame structure is shown in FIG. 6, and includes 6 UL (Up Link) short TTIs in a 1ms subframe. Note that here the OFDM symbol numbering starts from 0, i.e. there are 14 OFDM in a 1ms subframe, numbered sequentially #0 to # 13.

And when the multi-sTTI transmission is scheduled, the maximum N sTTI transmissions are scheduled. N consecutive sTTI are now available for transmitting the sPUSCH. Preferably, N is 2 or 3 or 4 or 6 or 8, but not limited thereto. When it is determined that the maximum number of scheduled N sTTI transmissions is determined, the number of actually scheduled transmissions of the plurality of sTTI is 1 to N sTTI. The determination mode of the N value is predefined or the value configured by a high-level signaling. In the following description, N ═ 4 is taken as an example, and is not limited thereto.

In scheduled transmission of N-4 UL sTTI, the determination method of the location of the DMRS is at least one of the following: in this embodiment, although uplink transmission is taken as an example for description, the method for determining the location of the DMRS is not limited to be used in uplink, and may be used in downlink. This embodiment is preferred for scenarios where DMRS is not fixed in TTI.

Mode 1: and the DMRS pattern is scheduled in the same single sTTI, and the mode of indicating UL DMRS is the same as the single sTTI. At this time, only the DMRS pattern in the first sTTI of the scheduling is indicated, and the subsequent sTTI does not indicate. In this case, the constraint is that the pure D pattern and the | R pattern cannot be indicated in the first sTTI, and the pattern containing R must be indicated.

It should be added that the UL DMRS pattern during single-sti scheduling is shown in table 4: the included UL DMRS patterns include at least the patterns listed in table 1, and may include other patterns.

TABLE 4 UL DMRS position at Single sTTI scheduling

It should be noted that: in table 4, "|" indicates the boundary of sTTI n.

Has the advantages that: the method does not need to design a new pattern structure, namely the pattern structure is also the structure when single sTTI scheduling is carried out. No control overhead is added. The other UL sTTI that are scheduled simultaneously have no DMRS except the first one.

Mode 2: and when the DMRS pattern is scheduled with a single sTTI, the DMRS pattern and the bit field are scheduled with the single sTTI, and the sTTI position indication containing the DMRS is added. In this case, only the DMRS pattern in one sTTI including the DMRS is indicated, and the rest sTTI do not indicate. In this case, the constraint is that the pure D pattern and the | R pattern cannot be indicated in the indicated sTTI, and the pattern including R must be indicated.

Has the advantages that: the method does not need to design a new pattern structure, namely the pattern structure is also the structure when single sTTI scheduling is carried out. Flexible indication of locations containing DMRSs is supported. Only one of the simultaneously scheduled UL sTTI contains DMRS.

Mode 3: and the DMRS pattern is the same as the DMRS pattern in single sTTI scheduling, the bit field is N times of that in single sTTI, and each sTTI is independently indicated. For example, when N is 4, the bit field indicates 4 times of DMRS position for single-sTTI scheduling. At this time, the DMRSs corresponding to each sTTI actually scheduled are indicated. The method is most flexible and has the largest overhead. For example, when actual scheduling n is 2sTTI, it is assumed that a bit field indicating UL DMRS position is 2bits when single sTTI is scheduled, at this time, a multi-sTTI scheduling bit field is 8bits, and at this time, because the number of actually scheduled UL sTTI is 2, the first 4 bits of 8bits are valid. The first 2bits of the effective 4 bits indicate the UL DMRS position in the first scheduled UL sTTI, and the last 2bits indicate the UL DMRS position in the second scheduled sTTI.

Has the advantages that: the method does not need to design a new pattern structure, namely the pattern or the structure during single sTTI scheduling, and simultaneously supports flexible indication with larger control overhead.

Mode 4: and indicating whether the rest sTTI except the first sTTI in the scheduled N sTTI carries the DMRS and the position. And the default first sTTI always has the DMRS, indicates whether another sTTI contains the DMRS and the position of another sTTI containing the DMRS and indicates the position of the symbol where the DMRS is located in the sTTI. And the indication method of the position of the symbol where the DMRS is located in one sTTI is the same as the indication method of the position of the DMRS when the single sTTI is used for scheduling.

The mode 4 further includes: sub-mode 4-1 and sub-mode 4-2, wherein sub-mode 4-1: the indication comprises that the DMRS is positioned in 1sTTI except the first sTTI in the rest sTTI and the symbol position of the DMRS in the sTTI is indicated. And the indication method of the position of the symbol where the DMRS is located in one sTTI is the same as the indication method of the position of the DMRS when the single sTTI is used for scheduling. For example, when N is 4, the following table 1 indicates whether another sTTI includes a DMRS and a location of another sTTI including the DMRS using 2 bits.

TABLE 1

Sub-mode 4-2: and indicating whether another sTTI contains the DMRS and indicating the position of the symbol in which the DMRS is located in the sTTI. Preferably, the sTTI position is fixed at the last of the scheduled sTTI when there is another sTTI containing the DMRS. Wherein the indication of the presence or absence of the other sTTI comprises that the DMRS is indicated preferably using 1 bit. And the indication method of the position of the symbol where the DMRS is located in one sTTI is the same as the indication method of the position of the DMRS when the single sTTI is used for scheduling.

Has the advantages that: DMRS overhead can be saved, and another sTTI containing DMRS can be supported with a smaller indication overhead. The method is suitable for medium and low speed moving scenes and high speed moving scenes.

Mode 5: indicating one of the predefined DMRS patterns. Wherein the predefined DMRS patterns are defined separately for the actual number of scheduled multiple sTTI scheduling, or the predefined DMRS patterns are jointly coded with the number of scheduled sTTI.

Namely, the UL DMRS pattern in multi-sTTI scheduling is predefined and the specific pattern is determined in multi-sTTI scheduling. DMRS patterns are predefined for consecutive 2, 3., N sTTI schedules. When N is 4, DMRS patterns for consecutive 2,3, 4sTTI scheduling are predefined.

When the pattern is unique when scheduled in consecutive 2, 3., N sTTI, respectively, there is no need to indicate

When the pattern is multiple in the continuous 2, 3., N sTTI scheduling, one of the patterns is indicated.

Examples are defined for the actual scheduling number of multi-sTTI scheduling by the predefined DMRS pattern: as shown in table 5, when N is 4, and N is 1,2,3, 4sTTI are continuously scheduled, a pilot pattern candidate set is predefined. And further determining the meaning of the 2bits indication according to the number n of the continuously scheduled sTTI, and indicating one pattern. It should be noted that the pilot patterns listed in the table are only examples, but not limited thereto.

TABLE 5

It should be noted that: when 3OS, DR corresponds to DDR and RD corresponds to RDD. Taking N as an example, RD | DD indicates that the first sTTI has a DMRS and is located in the first sTTI, and the second sTTI has no DMRS. The rest is similar and is not described in detail.

The predefined DMRS pattern and the number of scheduled sTTI are joint coding examples: when N-4, the actual number of schedules for at most N-4 sTTI schedules is N-1 or 2 or 3 or 4. As shown in table 6, at different actual scheduling numbers sTTI, the predefined DMRS pattern sets are joint to the scheduled sTTI number, indicating the number of actual scheduled sTTI and the sTTI position where the DMRS is located, i.e. one of the predefined DMRS pattern sets. It should be noted that the pilot patterns listed in the table are only examples, but not limited thereto.

TABLE 6

Has the advantages that: this approach has less control overhead. Meanwhile, the DMRS pattern structure for multiple sTTI needs to be designed. And joint coding indications may further save control overhead.

By the method provided by the preferred embodiment 2, DMRS cost can be saved during multi-sTTI scheduling, and one or more sTTI including DMRS is supported by a smaller indication cost indication, so that the method is suitable for medium and low speed mobile scenarios and high speed mobile scenarios. And meanwhile, after the overhead of pilot frequency is saved, more resources can be used for data transmission, and the frequency spectrum efficiency of the system is improved.

Preferred embodiment 3

The base station schedules the terminal A to transmit downlink data in a single TTI or a plurality of TTIs, wherein the TTI comprises a small number of OFDM symbols, for example, not more than 7 OFDM symbols. The preferred embodiment 3 is described with a short TTI structure in an LTE system, but is not limited thereto. DL short TTI frame structure as shown in fig. 5, 6 DL (down link) short TTIs are contained in a 1ms subframe, and Pattern1 is used when sPDSCH is configured to start from OFDM symbol #1 or # 3; pattern2 is used when the sPDSCH is configured to start from OFDM symbol # 2. Note that here the OFDM symbol numbering starts from 0, i.e. there are 14 OFDM in a 1ms subframe, numbered sequentially #0 to # 13.

The DCI of a scheduling single TTI or a plurality of TTIs can be transmitted in any DL sTTI, and when the DCI is positioned in DL sTTI #0, the DCI is carried by a PDCCH channel; when the DCI is located in DL sTTI #1 to #5, it is carried by sPDCCH channel. Alternatively, DCI scheduling multiple sttis may be transmitted in partial sttis, e.g. only DL sTTI #0, and e.g. only DL sTTI #0, 3.

CRS-based sPDCCH and DMRS-based sPDCCH are simultaneously supported in the sTTI, and both types of sPDCCH support centralized mapping and distributed mapping. For CRS-based sPDCCH, both localized mapping and distributed mapping support frequency-first time-second sCCE-to-sREG mapping. For DMRS-based sPDCCH, both the localized mapping and the distributed mapping support time-first frequency-second cce-to-sREG mapping (mapping manner of time first frequency second). And the sREG numbering order is: for CRS-based sPDCCH, the sequence of the sREG numbering is frequency-first time-second (frequency is first and time is second); for DMRS-based sPDCCH, the sequence of sREG numbering is time-first frequency-second.

Therefore, under these conditions, specific schemes and formulas for sCCE-to-sREG mapping need to be determined.

It should be noted that, in sTTI #1-5, the RB set in which CRS-based sPDCCH is located supports 1 or 2 OFDM symbols, and one of them is configured through higher layer signaling. The RB set of the DMRS-based sPDCCH has the same OFDM number as the sTTI, namely 2 or 3 OFDM symbols are supported.

For DMRS-based sPDCCH, assume configured RB set X_mContaining the number of PRBs N_PRBPRBs configured by higher layer signaling. Containing a number of OFDM symbols of N_OFDMThe OFDM symbols are the same as the number of OFDM symbols contained in the sTTI. Since one sREG is known as 1RB, i.e., 12 REs (including pilot) in one OFDM symbol, the number of sREGs is N_sREG＝N_PRB·N_OFDM. In the following descriptionIndicates the number of sREGs contained in one sCCE.

When mapping in a centralized manner, the following principles are satisfied: with N_OFDMThe sREGs are a group which continuously form an sCCE in the frequency domain. sREG # m contained in sCCE # n satisfies the formulaOr sREG number of sCCE # nWherein

When the mapping is distributed, the following principles are satisfied: with N_OFDMsREGs are a group of equal intervals in frequency domainThe isolated powder is formed into a sCCE. sREG # m contained in sCCE # n satisfies the formulaOr sREG number of sCCE # nWhereinv＝0,1,...,N_OFDM-1，

To be provided withFor example, when N is_PRBA schematic diagram of centralized mapping and distributed mapping is shown in fig. 7 when 12 PRBs.

For CRS-based sPDCCH, assume configured RB set X_mContaining the number of PRBs N_PRBPRBs configured by higher layer signaling. Containing a number of OFDM symbols of N_OFDMOFDM symbols, configured by higher layer signaling. Since one sREG is known as 1RB, i.e., 12 REs (including pilot) in one OFDM symbol, the number of sREGs is N_sREG＝N_PRB·N_OFDM. In the following descriptionIndicates the number of sREGs contained in one sCCE.

When mapping in a centralized manner, the following principles are satisfied: a set of sregs contiguous in the frequency domain in a single symbol constitutes one sCCE. sREG # m contained in sCCE # n satisfies the formulaOr sREG number of sCCE # nWherein,

when the mapping is distributed, the following principles are satisfied: a set of sregs equally spaced apart in the frequency domain in a single symbol constitutes one sCCE. sREG # m contained in sCCE # n satisfies the following formula:

equation 1:

equation 2:

equation 3:

when in useWhen the temperature of the water is higher than the set temperature,when in useWhen the temperature of the water is higher than the set temperature,

equation 4:

equation 5:

equation 6:equation 7:

equation 8:

equation 9:

or sREG number contained in sCCE # n is at least one of the following formulas:

equation 1:

wherein,equation 2:

wherein,

equation 3:

wherein N is 0, …, N_sCCE,p-1 andN_sCCE,prepresents the number of scces in the control channel resource block set p.And isRepresents the number of sREGs contained in each sCCE.Represents the number of sregs contained in each OFDM symbol in the control channel resource block set p. Since 1 sREG is 1RB in 1 OFDM symbol, soEquation 3 applies to any number of RBs in RB set. Note in particular that the intermediate terms in equation 3 cannot be written asSince for the number of RBs in RB set is notWhen it is an integral multiple ofThis may cause one sCCE that should be mapped to the second symbol to still map to the first symbol, which may result in the sregs corresponding to two scces with different indexes being the same, which may result in ambiguity and misinterpretation, for example: n is a radical of_PRB＝18PRBs，N_OFDM＝2,In this case, sREG corresponding to n-4 is sREG #0,4,8, and 12, which is the same as sREG corresponding to n-0. This ambiguity and misinterpretation does not occur in equation 3, where n-0 corresponds to sREG #0,4,8,12, and n-4 corresponds to sREG #18,22,26, 30.

Equation 4:

wherein N is 0, …, N_sCCE,p-1 and N_sCCE,pRepresents the number of scces in the control channel resource block set p.And isRepresents the number of sREGs contained in each sCCE.Represents the number of sregs contained in each OFDM symbol in the control channel resource block set p. Since 1 sREG is 1RB in 1 OFDM symbol, soAnd equation 4 applies only to the number of RBs in RB setInteger multiples of.

With N_OFDM＝2,For example, when N is_PRBA schematic diagram of the centralized mapping and the distributed mapping is shown in fig. 8 when 16PRBs are used.

Or when the mapping is distributed, the following principles are satisfied: sREGs selected at equal intervals among all numbered sREGs form an sCCE. sREG # m contained in sCCE # n satisfies the formulaOrOr sREG number of sCCE # nOrWherein

Meanwhile, when the mapping between the control channel element CCE and the resource element group REG is centralized mapping, a group of REGs consecutive in the frequency domain form a CCE in a single symbol, and in order to avoid that REG resources used at a high aggregation level completely contain REG resources used at a low aggregation level and cause misinterpretation at different aggregation levels, an interleaving method or physical layer signaling is used to indicate the aggregation levels or information at different aggregation levels is subjected to different scrambling. When the method is used for the sPDCCH channel, CCE corresponds to sCCE, and REG corresponds to sREG.

When the aggregation level L is indicated by physical layer signaling, that is, the aggregation level used is directly indicated in DCI, for example, 2bits is used to indicate that L is one of 1,2,4, and 8. For terminal verification. And misunderstanding among different aggregation levels is avoided.

By scrambling the information differently for different aggregation levels: a preferred method is to scramble the CRC with different masks for different aggregation levels, e.g. L1, 2,4,8 respectively<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>、<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>、<0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0>、<0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1>. Another preferred method is to scramble the DCI + CRC information, or the DCI + CRC encoded information, or the rate matched information with a scrambling sequence, e.g.Where b (i) is the pre-scrambling information, c (i) is the scrambling sequence (preferably generated using a pseudo-random sequence of the LTE system using Gold sequences of length 31),in which the initial values of the scrambling code sequences are distinguished using different aggregation levels (e.g. c)_init＝L)。

For the interleaving method: for a candidate set with an aggregation level L, the included REG indexes are sequentially written into the interleaver, read out from the interleaver according to a column permutation pattern, and the empty elements are deleted after reading out. And when the REG index is larger than X, defining the REG index as a null element.

Wherein L is 1,2,4 or 8.

Where X ═ L · M-1, M denotes the number of REGs contained in each CCE.

The column replacement pattern is at least one of:

<0,4,8,12,16,20,24,28,1,5,9,13,17,21,25,29,2,6,10,14,18,22,26,30,3,7,11,15,19,23,27,31>；

taking L-2 and M-4 as an example, when the column permutation pattern is <1,17,9,25,5,21,13,29,3,19,11,27,7,23,15,31,0,16,8,24,4,20,12,28,2,18,10,26,6,22,14,30>, REG #0-7 is sequentially written, after reading, when the REG index is greater than 7, it is considered as NULL element < NULL > elements, that is, after removing the NULL element, the REG index is 1,5,3,7,0,4,2,6, that is, when the first control channel element 0 of the candidate set corresponding to L-2 contains REG #1,5,3,7, and when the CCE #0 of the CCE set L-1 contains REG #1,3,0,2, the resources used at a high aggregation level do not completely contain REG #1 used at a low aggregation level, and thus different aggregation levels are not caused.

Similarly, when the column permutation pattern is <0,4,8,12,16,20,24,28,1,5,9,13,17,21,25,29,2,6,10,14,18,22,26,30,3,7,11,15,19,23,27,31>, REG #0-7 is sequentially written, after reading, when the REG index is greater than 7, it is considered as a NULL element < NULL > elements, i.e., after removing the NULL element, the REG index is 0,4,1,5,2,6,3,7, i.e., when the first control channel element CCE #0 corresponding to the candidate set with L ═ 2 contains REG #0,4,1,5, and when the CCE #0 corresponding to L ═ 1 contains REG #0,1,2,3, the resources used at the high aggregation level do not completely contain the resources used at the low aggregation level, and thus the different aggregation levels are not misinterpreted.

Through the technical solution of the above preferred embodiment 3, the resource unit group corresponding to the control channel unit used by the downlink control channel can be determined during single TTI scheduling or multi-TTI scheduling, so that the terminal and the base station can accurately know the specific control resource position, and the distributed scheme implemented by the present patent can enable centralized transmission and distributed transmission to have maximum performance gain respectively.

Preferred embodiment 4

The base station activates terminal a to perform 1 semi-persistent scheduling SPS transmission for a period. Preferably, the TTI contains a smaller number of OFDM symbols, for example, no more than 7 OFDM symbols, but is not limited thereto. In this embodiment, a short structure in a Long-term evolution (Long-term evolution, abbreviated as LTE) system is used for explanation, that is, the short TTI is to be understood as short TTI (short TTI, abbreviated as sTTI), but the invention is not limited thereto. DL short TTI frame structure as shown in fig. 5, 6 DL (down link) short TTIs are contained in a 1ms subframe, and Pattern1 is used when sPDSCH is configured to start from OFDM symbol #1 or # 3; pattern2 is used when the sPDSCH is configured to start from OFDM symbol # 2. Note that here the OFDM symbol numbering starts from 0, i.e. there are 14 OFDM in a 1ms subframe, numbered sequentially #0 to # 13. The UL short TTI frame structure is shown in fig. 6, and includes 6 UL (up link) short TTIs in a 1ms subframe. Note that here the OFDM symbol numbering starts from 0, i.e. there are 14 OFDM in a 1ms subframe, numbered sequentially #0 to # 13.

The DCI of the scheduling sTTI SPS can be transmitted in any DL sTTI, and when the DCI is positioned in DL sTTI #0, the DCI is carried by a PDCCH channel; when the DCI is located in DL sTTI #1 to #5, it is carried by sPDCCH channel. Alternatively, DCI scheduling the sTTI SPS may be transmitted in partial sTTI, e.g. only DL sTTI #0, and e.g. only DL sTTI #0, 3.

When the sTTI SPS transmission is scheduled, the minimum periodicity is 1 sTTI. If the reduction of the reference signal density is not considered, each sTTI contains the reference signal, and if the reduction of the reference signal density is considered, at least 1sTTI in each N sTTIs contains the reference signal. The determination mode of the N value is predefined or the value configured by a high-level signaling. N is preferably 2,3, 6.

When SPS downlink transmission with an activation period of 1sTTI is performed, in every N DL sTTI transmissions, a determination method of a location of a Demodulation Reference Signal (DMRS, which may also be understood as a Reference Signal in the above embodiment) is at least one of the following: in this example, downlink transmission is taken as an example for description, but the method of determining the location of the DMRS is not limited to downlink, and may be used for uplink. In this example, the time domain position of the DMRS in the TTI is preferably fixed.

The first method is as follows: predefining in every N transmission time intervals, wherein only the first transmission time interval has a reference signal, and the rest transmission time intervals have no reference signal; no additional indication is needed at this time. DMRS is contained in the first PDSCH that activates SPS transmissions, and only the first sTTI of every N sTTI contains DMRS.

The second method comprises the following steps: whether to reduce the pilot density in every N transmission time intervals is indicated by 1-bit signaling. The signaling may be higher layer signaling, or physical layer signaling. Wherein, the 1bit indicates the existence of the DMRS when the physical layer signaling reuses single sTTI scheduling. Wherein, not reducing the pilot density means that all of the N transmission time intervals contain the reference signal, and reducing the pilot density means that less than the N transmission time intervals contain the reference signal. Reducing the pilot density includes at least one of: there is a reference signal only in the first transmission time interval; there is only a reference signal in the first and last transmission time interval; there is a reference signal only in the first and x transmission time intervals offset with respect to the first, x preferably being 1,2, N/2, N-1, N;

the third method comprises the following steps: signaling a reference signal pattern in every N transmission time intervals; such as shown in table 7. Note: r represents that the s contains RS, and D represents that the sTTI does not contain RS. If N is 2, 1bit is used to indicate that the pattern is RR or RD. If N is 3, 2bits is used to indicate the pattern is RRR, RDD, RDR or DRD. If N is 6, 2bits are used to indicate RRRRRR, RDRDRD, RDDRDD or RDRRDR. Preferably N-3 is aligned with the slot boundary. Preferably N-6 is aligned with the subframe boundary.

Table 7 indicates the pilot pattern in every N s

N＝2	N＝3	N＝6
			RR	RRR	RRRRRR
RD	RDD	RDRDRD
				RDR	RDDRDD
	DRD	RDRRDR

At this time, the solution of how the reference signal is used when there is no data transmission in the first sTTI of a group of N sTTI and there is data transmission in the subsequent sTTI includes at least one of the following: (1) the reference signal used is the DMRS received most recently; (2) the DMRS is also transmitted when no data is transmitted; (3) and delaying transmission until the next sTTI containing the DMRS, wherein the later sTTI is only required to be delayed when the N is 2, and is the sTTI containing the DMRS.

When SPS uplink transmission with an activation period of 1sTTI is performed, in every N UL sTTI transmissions, a determination method of a location of a Demodulation Reference Signal (DMRS, which may also be understood as a Reference Signal in the above embodiment) is at least one of the following: in this example, although uplink transmission is taken as an example for description, the method for determining the location of the DMRS is not limited to be used in uplink, and may be used in downlink. In this example, the time domain position of the DMRS in the TTI is preferably not fixed.

The first method is as follows: it is predefined that in every N TTIs, all N TTIs contain reference signals, and preferably only the first OFDM symbol in each transmission time interval contains reference signals. This way, the reference signal density is not reduced and the symbol position where the reference signal is located in each sTTI is predefined.

The second method comprises the following steps: predefining in every N transmission time intervals, only the first transmission time interval has a reference signal and the preferred mode is that only the first OFDM symbol in the first transmission time interval has the reference signal and the rest transmission time intervals have no reference signal; no additional indication is needed at this time. DMRS is contained in the first PUSCH activating SPS transmission, and only the first sTTI of every N sTTI contains DMRS.

The third method comprises the following steps: whether the reference signal density is reduced in every N transmission time intervals is indicated by 1-bit signaling. The signaling may be higher layer signaling, or physical layer signaling. Wherein, the physical layer signaling indicates DMRSposition by 2bits when reusing single sTTI scheduling. Wherein not reducing the reference signal density means that all of the N transmission time intervals contain reference signals and preferably only the first OFDM symbol in each transmission time interval contains reference signals, and reducing the reference signal density means that less than the N transmission time intervals contain reference signals and preferably only the first OFDM symbol in the transmission time interval containing reference signals contains reference signals. Reducing the reference signal density comprises at least one of: there is a reference signal only in the first transmission time interval; there is only a reference signal in the first and last transmission time interval; there is a reference signal only in the first and x transmission time intervals offset with respect to the first, x preferably being 1,2, N/2, N-1, N;

Table 8 indicates the reference signal pattern in every N sTTIs

N＝2	N＝3	N＝6
			RD\|RD	RD\|RD\|RD	RD\|RD\|RD\|RD\|RD\|RD
RD\|DD	RD\|DD\|DD	RD\|DD\|RD\|DD\|RD\|DD
			DR\|DD	RD\|DD\|RD	RD\|DD\|DD\|RD\|DD\|DD
DD\|RD	DD\|RD\|DD	DD\|RD\|DD\|DD\|RD\|DD

Note:|denotes the boundary of sTTI n

Preferably, the TTI in which the first traffic transmission activating SPS transmission is located contains a reference signal.

Preferably, when the signaling is physical layer signaling, the signaling is valid only in a period of 1 TTI and is not used for SPS transmission activation acknowledgement or deactivation acknowledgement, and all bits corresponding to the signaling are set to 0 for SPS transmission activation acknowledgement or deactivation acknowledgement in other periods; or have different meanings when the period is 1 TTI than other periods (valid for 1 TTI and for a reference signal indication every N TTIs, for a single TTI reference signal indication in other periods).

By the technical scheme provided by the preferred embodiment, DMRS overhead can be saved during sTTI SPS scheduling, and one or more sTTIs including DMRS can be supported by a smaller indication overhead indication, so that the method is suitable for medium-low speed mobile scenes and high-speed mobile scenes. Meanwhile, after the expense of the reference signal is saved, more resources can be used for data transmission, and the frequency spectrum efficiency of the system is improved.

Preferred embodiment 5

The base station configures the terminal A to perform semi-persistent scheduling (SPS) transmission containing 1 TTI in the period. Preferably, the TTI contains a smaller number of OFDM symbols, for example, no more than 7 OFDM symbols, but is not limited thereto. In this embodiment, when a short TTI structure in a Long-Term Evolution (LTE) system is used for description, that is, the TTI may be understood as a short TTI (short TTI, abbreviated as sTTI), but is not limited to this, and may also be used in a 5G NR new air interface system. It should be noted that, in this embodiment, when LTE is taken as an example, 1slot includes 7 OFDM symbols, and the duration is 0.5 ms; taking NR as an example, 1slot contains 14 OFDM symbols, and the duration is 1ms at a 15kHz subcarrier spacing. DL short TTI frame structure as shown in fig. 5, 6 DL (down link) short TTIs are contained in a 1ms subframe, and Pattern1 is used when sPDSCH is configured to start from OFDM symbol #1 or # 3; pattern2 is used when the sPDSCH is configured to start from OFDM symbol # 2. Note that here the OFDM symbol numbering starts from 0, i.e. there are 14 OFDM in a 1ms subframe, numbered sequentially #0 to # 13. The UL shortTTI frame structure is shown in fig. 6, and includes 6 UL (up link) short TTIs in a 1ms subframe. Note that here the OFDM symbol numbering starts from 0, i.e. there are 14 OFDM in a 1ms subframe, numbered sequentially #0 to # 13.

Scene 1: the DCI of the scheduling activation sTTI SPS can be transmitted in any DL sTTI, and when the DCI is positioned in the DLsTTI #0, the DCI is carried by a PDCCH channel; when the DCI is located in DL sTTI #1 to #5, it is carried by sPDCCH channel. At this time, the sTTI length is 2/3os or 1-slot through RRC configuration, and the sTTI SPS period is configured through RRC configuration respectively. Or the sTTI length and the sTTI SPS period are configured by RRC joint coding, that is, when the SPS period is configured to be 1sTTI, the corresponding sTTI length is indicated at the same time, for example, as shown in table 9, for example, indicating that both states 0 and 1 indicate that the SPS period is 1sTTI, but the corresponding sTTI lengths are different. Such as the examples in NR shown in table 10, jointly indicate the traffic duration (time domain length) and the SPS period. Note that the joint coding indications in tables 9 and 10 are only an example, and the states are merely examples, but not limited thereto. In this embodiment, os is an abbreviation of OFDM symbol.

TABLE 9 Joint coding indication sTTI SPS period and sTTI length

TABLE 10 Joint code indication SPS period and service duration

Scene 2: the DCI scheduling the active sTTI SPS may be transmitted in a partial sTTI, e.g. only in DL sTTI # 0. Or only the first mini-slot within a slot (containing 14 OFDM symbols) in the NR can transmit DCI scheduling the sTTI SPS or only one control channel trigger opportunity.

For transmission only in sTTI #0, the DCI is carried over the PDCCH at this time. When both the sTTI SPS period and offset are configured by RRC, the sTTI length and the sTTI SPS period and offset may be configured separately or jointly encoded.

When configured separately, the sTTI length is 2/3os or 1-slot is configured by RRC, and the sTTI SPS period and offset are configured by RRC, for example, as shown in table 11, it should be noted that, when the period is greater than 1ms, the offset only needs to consider the offset within the subframe range of 1ms, no matter what the period is, as table 11 shows the configuration for 2/3os, and table 12 shows the configuration for 1-slot; table 13 shows the configuration for the service duration of 2os in NR, and table 14 shows the configuration for 7 os. To sum up, when the length of the sTTI or the service duration is determined, the number of values of each cyclic offset value is: when the SPS period is less than 1ms, the value number of the offset value is the number of the SPS period containing 1sTTI or 1 service time; when the SPS period is more than 1ms, the offset value number is the number of 1sTTI or 1 service time length in 1 ms;

table 11 indicates sTTI SPS periods and offsets

Table 12 indicates sTTI SPS periods and offsets

Table 13 indicates SPS period and offset

Table 14 indicates SPS period and offset

When configured for joint coding, the sTTI length is 2/3os or 1-slot and the sTTI SPS period and offset are configured by RRC, as shown in table 15. As exemplified in NR shown in table 16, the service duration is exemplified by 2os and 7 os. It should be noted that, when the period is greater than 1ms, the offset only needs to consider the offset within the subframe range of 1ms, regardless of the period and the sTTI length. In summary, the number of values for each period offset value is: when the SPS period is less than 1ms, the value number of the offset value is the number of the SPS period containing 1sTTI or 1 service time; when the SPS period is more than 1ms, the offset value number is the number of 1 subframe containing 1sTTI or 1 service time length;

table 15 indicates the sTTI SPS period and offset and the sTTI length

Table 16 indicates SPS period and offset and service duration

When the sTTI SPS period is configured by RRC, the sTTI length and SPS offset are indicated by DCI joint coding at this time. In LTE sTTI, as shown in table 17. In NR, as shown in Table 18. The values in the tables are merely illustrative and not limiting.

Table 17 indicates sTTI lengths and SPS offsets

Indicating index	sTTI length and SPS offset
		0	2/3os and offset by 0sTTI
1	2/3os and offset by 1sTTI
		2	2/3os and offset by 2sTTI
3	2/3os and offset by 3sTTI
		4	2/3os and offset by 4sTTI
5	2/3os and offset by 5sTTI
		6	1slot and offset by 0sTTI
7	1slot and offset by 1sTTI

Table 18 indicates the service duration and SPS offset

Scene 3: the absence of the active DCI triggers SPS transmission, i.e., the SPS transmission is fully configured by RRC, which is also referred to as scheduling-free transmission, i.e., grant-free transmission. In this case, the SPS period, offset, and traffic time domain length may be configured separately or jointly coded. The scenario TI3ime555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555 5555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555

When configured separately, the service duration is configured through RRC signaling, and the SPS period and offset are configured through RRC signaling. The duration may be at least one of 2os, 4os, 7 os. The principle is as follows: when the length of sTTI or the service duration is determined, the number of values of each period offset value is the number of SPS periods including 1sTTI or 1 service duration, and at this time, the SPS period and the offset are configured by taking 7os as an example as shown in table 19. Or the principle is as follows: when the length of sTTI or the service duration is determined, the number of values of each period offset value is less than or equal to the number of SPS periods including 1sTTI or 1 service duration, and at this time, 7os is taken as an example to configure the SPS period and the offset as shown in table 20. Note that the values in the table are merely illustrative, and are not limited thereto.

Table 19 indicates SPS period and offset

Indicating index I _ sps	SPS period	Offset of
			0	1 service duration	I_sps
1-2	1ms	I_sps-1
			3-6	2ms	I_sps-3
7-12	3ms	I_sps-7
			...	...	...

Table 20 indicates SPS period and offset

Indicating index I _ sps	SPS period	Offset of
			0	1 service duration	I_sps
1-2	1ms	I_sps-1
			3-4	2ms	I_sps-3
5-6	3ms	I_sps-5
			...	...	...

When jointly coded, the service duration, SPS period and offset are configured through RRC signaling. The service duration includes 2os and 7os, but is not limited thereto. The principle is as follows: the value number of each period offset value is the number of SPS periods containing 1sTTI or 1 service duration, which is shown in table 21. Or the principle is as follows: the value number of each period offset value is less than or equal to the number of SPS periods containing 1sTTI or 1 service duration, which is shown in table 22. Note that the values in the table are merely illustrative, and are not limited thereto.

Table 21 indicates SPS period and offset and service duration

Table 22 indicates SPS period and offset and service duration

By the technical scheme provided by the preferred embodiment, the SPS period, the offset and the service time length can be flexibly determined in various modes when the SPS with the short service time length is transmitted in the sTTI SPS or NR, and the physical layer signaling overhead or the high layer signaling overhead is saved.

Example 9

An embodiment of the present invention further provides a storage medium including a stored program, where the program executes any one of the methods described above.

Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, indicating, in a preset manner, that a reference signal exists in at least one TTI in the scheduled N transmission time intervals, where N is a positive integer.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Embodiments of the present invention also provide a processor configured to execute a program, where the program executes to perform any of the steps in the method.

Optionally, in this embodiment, the program is configured to perform the following steps:

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining a reference signal, comprising:

indicating the existence of the reference signal in at least one of the scheduled N transmission time intervals in a preset mode, wherein N is a positive integer.

2. The method according to claim 1, wherein when the position of the reference signal is fixed in the transmission time interval, indicating the presence of the reference signal in at least one transmission time interval of the N transmission time intervals in a preset manner comprises at least one of:

the first method is as follows: in the N transmission time intervals, only the first transmission time interval has a reference signal, and the rest transmission time intervals have no reference signal;

the second method comprises the following steps: indicating that one of the scheduled N transmission time intervals contains a transmission time interval in which the reference signal is positioned;

the third method comprises the following steps: indicating whether each of the scheduled N transmission time intervals contains a reference signal;

the method is as follows: indicating that the scheduled N transmission time intervals contain at most K transmission time intervals in which the reference signals are located, wherein K is a positive integer smaller than N;

the fifth mode is as follows: indicating whether the rest of the N scheduled transmission time intervals except the first transmission time interval bear the reference signal and the position of the reference signal, wherein the first transmission time interval always has the reference signal and indicates whether another transmission time interval contains the reference signal and the position of another transmission time interval containing the reference signal;

the method six: by indicating the reference signal pattern in N transmission time intervals, wherein,

the reference signal pattern is a set of patterns for a scheduled number x of transmission time intervals,

or the reference signal pattern simultaneously carries scheduling transmission time interval number information,

3. The method of claim 2, wherein the reference signals are of the same type when there are reference signals in 2 or more than 2 of the N transmission time intervals.

4. The method of claim 2, wherein when reference signals are present for 2 or more than 2 of the N transmission time intervals, the reference signals are of the same type when the transmission time intervals are of different types.

5. The method of claim 2, wherein the mode five is implemented by one of the following modes:

indicating the positions of 1 transmission time interval containing the reference signal in the rest transmission time intervals except the first transmission time interval in the N transmission time intervals;

the use of 1bit indicates whether there is another transmission time interval containing reference signals in the N transmission time intervals except for the first transmission time interval.

6. The method of claim 3, further comprising:

when there is another transmission time interval containing the reference signal, the transmission time interval position is fixed at the last of the scheduled N transmission time intervals.

7. The method of claim 1, wherein during the downlink transmission, supporting the Physical Downlink Shared Channel (PDSCH) to use unused resources of the Physical Downlink Control Channel (PDCCH) comprises at least one of:

in the N transmission time intervals, only the first transmission time interval supports the PDSCH to use unused resources of the PDCCH;

when N >1, PDSCH is not supported to use unused resources of PDCCH;

when N is 1, supporting the PDSCH to use unused resources of the PDCCH;

in the N transmission time intervals, all transmission time intervals reuse the same unused resources of the PDCCH as the first transmission time interval.

8. The method according to claim 2 or 6, wherein the timing of feeding back ACK/NACK for data carried in N transmission time intervals is determined according to a reference signal position, and the determining method comprises at least one of:

mode 1: when only 1 transmission time interval of the plurality of transmission time intervals contains the reference signal, when the timing corresponding to the feedback ACK/NACK when the first transmission time interval contains the reference signal is k1 and the timing corresponding to the feedback ACK/NACK when the non-first transmission time interval contains the reference signal is k2, k1< k2 is satisfied;

mode 2: when more than 1 transmission time interval in the plurality of transmission time intervals contains the reference signal, when the timing corresponding to the feedback ACK/NACK when the last transmission time interval contains the reference signal is k3, and the timing corresponding to the feedback ACK/NACK when the last transmission time interval does not contain the reference signal is k4, k3> k4 is satisfied;

wherein k1, k2, k3 and k4 are all positive numbers.

9. The method of claim 1, wherein indicating, in a preset manner, the presence of a reference signal in at least one transmission time interval of the N transmission time intervals when the reference signal position is not fixed within the transmission time interval comprises at least one of:

the first method is as follows: passing a reference signal pattern indicating a first transmission time interval of the N transmission time intervals, wherein the reference signal pattern is consistent with a reference signal pattern when a single transmission time interval is scheduled;

the second method comprises the following steps: indicating one transmission time interval in N transmission time intervals and a reference signal pattern in the transmission time interval, wherein the reference signal pattern is consistent with a reference signal pattern when a single transmission time interval is scheduled;

the third method comprises the following steps: the method comprises the steps of obtaining a reference signal pattern by indicating at most K transmission time intervals in N transmission time intervals, wherein the reference signal pattern is consistent with a reference signal pattern when a single transmission time interval is scheduled, and K is a positive integer smaller than N;

the method is as follows: the method comprises the steps of obtaining a reference signal pattern of each of N transmission time intervals, wherein the reference signal pattern is consistent with a reference signal pattern when a single transmission time interval is scheduled;

the fifth mode is as follows: indicating whether the rest of the N scheduled transmission time intervals except the first transmission time interval bear the reference signal and the position of the reference signal, wherein the first transmission time interval always has the reference signal, indicating whether another transmission time interval contains the reference signal and the position of another transmission time interval containing the reference signal and indicating the position of the reference signal in the transmission time interval;

10. The method of claim 9, wherein the reference signals are of the same type when there are reference signals in 2 or more than 2 of the N transmission time intervals.

11. The method of claim 9, wherein when reference signals are present for 2 or more than 2 of the N transmission time intervals, the reference signals are of a same type when transmission time interval types are different.

12. The method of claim 9, wherein the mode five is implemented by one of the following modes:

13. The method of claim 12, further comprising:

14. A method for determining a reference signal, comprising:

determining that a reference signal exists in at least one transmission time interval in every N transmission time intervals in semi-persistent scheduling (SPS) transmission in a preset mode, wherein N is a positive integer.

15. The method of claim 14, wherein the time domain position of the reference signal is fixed in a transmission time interval, and wherein the predetermined manner comprises at least one of:

16. The method of claim 15, wherein the reference signal density is reduced by at least one of: there is a reference signal only in the first transmission time interval; there is only a reference signal in the first and last transmission time interval; there is a reference signal in only the first sum and x transmission time intervals offset from the first, where x is an integer taken from the set [0, N ].

17. The method of claim 14, wherein the time domain position of the reference signal is not fixed in a transmission time interval, and wherein the predetermined manner comprises at least one of:

the second method comprises the following steps: predefining every N transmission time intervals, wherein only the first transmission time interval contains a reference signal;

18. The method of claim 17, wherein only a first OFDM symbol in a transmission time interval containing the reference signal contains the reference signal in every N transmission time intervals.

19. The method of claim 17,

reducing the reference signal density by at least one of: there is a reference signal only in the first transmission time interval; there is only a reference signal in the first and last transmission time interval; there is a reference signal in only the first sum and x transmission time intervals offset from the first, where x is an integer taken from the set [0, N ].

20. A method according to any of claims 15-19, characterized in that the transmission time interval in which the first traffic transmission of an SPS transmission is activated contains a reference signal.

21. The method according to any of claims 15-19, wherein when the signaling is physical layer signaling, the signaling is valid only in 1 transmission time interval period, and all bits corresponding to the signaling are set to 0 in other periods for SPS transmission activation acknowledgement or deactivation acknowledgement; or have different meanings when the period is 1 transmission time interval and other periods, respectively, wherein the period is 1 transmission time interval valid and used for the reference signal indication in every N transmission time intervals, and the other periods are used for the reference signal indication of a single transmission time interval.

22. The method according to any of claims 14-19, wherein the method is applied to semi-persistent scheduling, SPS, and SPS periodicity is 1 transmission time interval.

23. A method for determining a semi-persistent scheduling (SPS) transmission time, comprising:

indicating the SPS period, the offset value and the transmission time interval length through high-layer signaling, wherein the transmission time interval length is jointly coded with the SPS period and the offset value; or indicating the SPS period and the offset value through a high-level signaling, and simultaneously enabling the physical layer signaling of the SPS transmission to be positioned at the limited transmission time; or informing the SPS period through a high-level signaling, simultaneously activating the SPS transmission physical layer signaling to be positioned at the limited transmission moment, and jointly coding the indication deviation value and the transmission time interval length;

24. The method of claim 23, wherein the restricted transmission time instants are at least one of: the first control resource set is located only in a physical downlink control channel PDCCH, only in a short transmission time interval #0 and/or a short transmission time interval #3, and only in a control resource set configured in a time slot, where the resource set is located in the first P symbols in the time slot, and is only located in a time domain of a plurality of control resource sets configured in the time slot, where a P value includes: 1,2,3,7.

25. The method of claim 23, wherein jointly encoding comprises at least: the SPS period and the offset are uniformly indicated, and the offset value quantity of each period is the number of 1 short transmission time interval or 1 service time length contained in the SPS period; or the number of values of the offset value for each period is less than or equal to the number of the SPS period containing 1 short transmission time interval or 1 service duration.

26. A method for determining a control channel element, comprising:

for a physical downlink control channel PDCCH based on a demodulation reference signal, when the mapping between a control channel element CCE and a resource element group REG is distributed mapping, at least the following principles are satisfied: forming a CCE by taking M REGs as a group in a frequency domain in a discrete manner at equal intervals or intervals, wherein M is the number of REGs contained by K RBs in a transmission time interval, K is a positive integer, and N is a positive integer;

27. The method of claim 26, further comprising:

when the mapping between the control channel element CCE and the resource element group REG is localized mapping, a set of REGs consecutive in the frequency domain in a single symbol constitutes one CCE, and an interleaving method or physical layer signaling is used to indicate an aggregation level, or information of different aggregation levels is scrambled differently.

28. The method of claim 26, wherein a set of REGs that are equally or discretely spaced in frequency domain in a single symbol form a CCE, and wherein, when used for short physical downlink control channel (sPDCCH), the sREG index that forms sCCE # n comprises at least one of the following manners:

the first method is as follows:

the second method comprises the following steps:

29. The method of claim 27, wherein the interleaving method comprises: for a candidate set with an aggregation level L, sequentially writing REG indexes contained in the candidate set into an interleaver, reading the REG indexes from the interleaver according to a column permutation pattern, deleting empty elements after reading the REG indexes, wherein the empty elements are defined when the REG indexes are larger than X,

wherein L ═ 1,2,4, or 8;

where X ═ L · M-1, M denotes the number of REGs contained in each CCE.

30. The method of claim 29, wherein the column permutation pattern comprises at least one of:

31. an apparatus for determining a reference signal, comprising:

the first indication module is configured to indicate, in a preset manner, that a reference signal exists in at least one of N scheduled transmission time intervals, where N is a positive integer.

32. An apparatus for determining a control channel element, comprising:

33. An apparatus for determining a reference signal, comprising:

34. An apparatus for determining semi-persistent scheduling (SPS) transmission time instances, comprising:

35. A storage medium comprising a stored program, wherein the program when executed performs the method of any one of claims 1 to 13, or the method of any one of claims 14 to 22, or the method of any one of claims 23 to 25, or the method of any one of claims 26 to 30.