CN108024233B - Data transmission method and device - Google Patents
Data transmission method and device Download PDFInfo
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- CN108024233B CN108024233B CN201610959093.XA CN201610959093A CN108024233B CN 108024233 B CN108024233 B CN 108024233B CN 201610959093 A CN201610959093 A CN 201610959093A CN 108024233 B CN108024233 B CN 108024233B
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- uplink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/121—Wireless traffic scheduling for groups of terminals or users
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1221—Wireless traffic scheduling based on age of data to be sent
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Abstract
The embodiment of the invention provides a data transmission method and a device, wherein the method comprises the following steps: a terminal receives uplink permission information sent by a base station and determines a transmission interval according to the uplink permission information; and after receiving the uplink permission information, the terminal transmits uplink data to the base station according to the transmission interval. The base station can flexibly indicate the transmission interval, so that the terminal can flexibly determine the transmission interval according to the indication of the base station to transmit the uplink data, and the resource waste is reduced.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a data transmission method and apparatus.
Background
Currently, Enhanced Machine Type Communication (eMTC) technology is under constant research. For half-duplex User Equipment (UE), if eMTC is used to transmit data, when scheduling transmission of uplink and downlink data, a preset transmission rule needs to be followed, that is, there is a certain constraint on transmission time, for example: a downlink Assignment (DL Assignment) carried on an MTC Physical downlink Control Channel (MTC Physical DL Control Channel, MPDCCH for short) and a data carried on a Physical Uplink Shared Channel (PUSCH) corresponding to the downlink Assignment are separated by 3 shortest Transmission intervals (TTI), that is, the base station finishes transmitting the DL Assignment on the nth subframe and starts transmitting data on the PUSCH at the n +4 th subframe.
However, the prior art transmission of data results in some slot resources being wasted.
Disclosure of Invention
The embodiment of the invention provides a data transmission method and device, which are used for solving the problem that resources are possibly wasted when data are transmitted in the prior art.
A first aspect of an embodiment of the present invention provides a data transmission method, including:
a terminal receives uplink permission information sent by a base station and determines a transmission interval according to the uplink permission information;
and after receiving the uplink permission information, the terminal transmits uplink data to the base station according to the transmission interval.
Optionally, the receiving, by the terminal, uplink grant information sent by the base station, and determining a transmission interval according to the uplink grant information includes:
the terminal receives uplink permission information sent by the base station, wherein the uplink permission information comprises: a transmission interval k for indicating the number of the interval of the shortest transmission interval TTI;
the terminal determines the last subframe n of the uplink permission information transmission and acquires the transmission interval k according to the uplink permission information, wherein n is an integer greater than or equal to 0, and k is an integer greater than or equal to 3;
after the terminal receives the uplink grant information, the terminal transmits uplink data to the base station according to the transmission interval, including:
and after the terminal receives the uplink permission information, the terminal starts to transmit the uplink data on the subframe of the backward interval k from the subframe n according to the transmission interval.
Optionally, before the terminal receives the uplink grant information sent by the base station, the method further includes:
the terminal receives downlink allocation information sent by the base station, wherein the downlink allocation information comprises: and the downlink transmission time length x is an integer greater than 0.
Optionally, when the terminal receives the uplink grant information first and then receives downlink data,
the terminal receives uplink permission information sent by a base station, and determines a transmission interval according to the uplink permission information, and the method comprises the following steps:
the terminal receives uplink permission information sent by a base station and determines the last subframe n of the uplink permission information transmission;
x +1 is taken as the transmission interval.
Optionally, after receiving the uplink grant information, the terminal transmits uplink data to the base station according to the transmission interval, where the method includes:
and after the terminal receives the uplink permission information, the terminal starts to transmit uplink data on the subframe with the backward interval x +1 of the subframe n according to the transmission interval.
Optionally, after the beginning of transmitting uplink data on the subframe n with the backward interval x +1, the method further includes:
and the terminal starts to transmit uplink control information on a subframe with a backward interval x +3 of a subframe n, wherein the uplink data is stopped being transmitted in the process of transmitting the uplink control information, and the uplink data is continuously transmitted after the transmission of the uplink control information is finished.
Optionally, before the terminal receives the uplink grant information sent by the base station and determines the transmission interval according to the uplink grant information, the method further includes:
the terminal receives downlink data sent by the base station;
and the terminal determines the last subframe m of the downlink data transmission according to the downlink transmission time length x.
Optionally, the receiving, by the terminal, uplink grant information sent by the base station, and determining a transmission interval according to the uplink grant information includes:
the terminal receives the uplink permission information sent by the base station and determines the transmission duration f of the uplink permission information, wherein f is an integer greater than 0;
and the terminal determines the transmission interval to be f +1 according to the transmission duration f of the uplink permission information.
Optionally, after receiving the uplink grant information, the terminal transmits uplink data to the base station according to the transmission interval, where the method includes:
and after the terminal receives the uplink permission information, the terminal starts to transmit uplink control information to a subframe with a backward interval f +1 in the subframe m, and transmits the uplink data after the transmission of the uplink control information is finished.
Wherein, the uplink permission information and the downlink allocation information both belong to the downlink control information.
And the terminal receives the downlink control information sent by the base station and determines the transmission interval according to the downlink control information.
A second aspect of the embodiments of the present invention provides a data transmission method, including:
a base station sends uplink permission information to a terminal, wherein the uplink permission information is used for indicating a transmission interval to the terminal;
and the base station receives the uplink data transmitted by the terminal according to the transmission interval.
Optionally, the uplink grant information includes: and the transmission interval k is used for indicating the number of the shortest transmission intervals TTI of the interval.
Optionally, before the base station sends the uplink grant information to the terminal, the method further includes:
the base station sends downlink allocation information to the terminal, wherein the downlink allocation information comprises: and the downlink transmission time length x is an integer greater than 0.
A third aspect of the embodiments of the present invention provides a data transmission method, including:
the method comprises the steps that a terminal blindly detects downlink control information on a subframe which is configured with an MPDCCH candidate identifier in a preset subframe, and simultaneously receives downlink data in the preset subframe, wherein the preset subframe is a subframe which is distributed by a base station according to semi-static scheduling and is used for transmitting the downlink data;
when the total amount of frequency domain resources occupied by data and downlink control information transmitted on the subframe configured with the MPDCCH candidate identifier is less than or equal to the capacity of a current narrowband channel, the terminal analyzes the downlink data and the downlink control information; alternatively, the first and second electrodes may be,
when the total amount of frequency domain resources occupied by data and downlink control information transmitted on the subframe configured with the MPDCCH candidate identifier is larger than the capacity of a current narrow-band channel, if blind detection of the downlink control information fails, the terminal analyzes the downlink data; and if the downlink control information is successfully blind-checked, the terminal analyzes the downlink data and the downlink control information.
A fourth aspect of embodiments of the present invention provides a data transmission apparatus, which includes modules or means (means) for performing the methods provided in the first aspect and various implementations of the first aspect.
A fifth aspect of embodiments of the present invention provides a data transmission apparatus, which includes modules or means (means) for performing the methods provided by the second aspect and various implementations of the second aspect.
A sixth aspect of embodiments of the present invention provides a data transmission apparatus, which includes means or means (means) for performing the methods provided in the third aspect and various implementations of the third aspect.
A seventh aspect of the embodiments of the present invention provides a data transmission apparatus, where the apparatus includes a processor and a memory, where the memory is used to store a program, and the processor calls the program stored in the memory to execute the method provided in the first aspect of the present application.
An eighth aspect of the embodiments of the present invention provides a data transmission apparatus, where the apparatus includes a processor and a memory, where the memory is used to store a program, and the processor calls the program stored in the memory to execute the method provided in the second aspect of the present application.
A ninth aspect of the embodiments of the present invention provides a data transmission apparatus, where the apparatus includes a processor and a memory, where the memory is used to store a program, and the processor calls the program stored in the memory to execute the method provided in the third aspect of the present application.
A tenth aspect of embodiments of the present invention provides a data transmission apparatus, comprising at least one processing element (or chip) for performing the method of the first aspect above.
An eleventh aspect of embodiments of the present invention provides a data transmission apparatus, including at least one processing element (or chip) for performing the method of the second aspect above.
A twelfth aspect of embodiments of the present invention provides a data transmission apparatus, including at least one processing element (or chip) configured to perform the method of the third aspect.
A thirteenth aspect of embodiments of the present invention provides a program that, when executed by a processor, is configured to perform the method of the first aspect above.
A fourteenth aspect of an embodiment of the present invention provides a program product, such as a computer-readable storage medium, including the program of the thirteenth aspect.
A fifteenth aspect of embodiments of the present invention provides a program which, when executed by a processor, is operable to perform the method of the second aspect above.
A sixteenth aspect of embodiments of the present invention provides a program product, such as a computer readable storage medium, comprising the program of the fifteenth aspect.
A seventeenth aspect of embodiments of the present invention provides a program that, when executed by a processor, is configured to perform the method of the above third aspect.
An eighteenth aspect of embodiments of the present invention provides a program product, such as a computer-readable storage medium, including the program of the seventeenth aspect.
In the data transmission method and the device provided by the embodiment of the invention, a terminal receives uplink permission information sent by a base station and determines a transmission interval according to the uplink permission information; and after receiving the uplink permission information, transmitting uplink data to the base station according to the transmission interval. The base station can flexibly indicate the transmission interval, so that the terminal can flexibly determine the transmission interval according to the indication of the base station to transmit the uplink data, and the resource waste is reduced.
Drawings
FIG. 1 is a block diagram of a communication system;
fig. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of another data transmission method according to an embodiment of the present invention;
fig. 4 is a timing diagram of a data transmission method according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of another data transmission method according to an embodiment of the present invention;
fig. 6 is a timing diagram of a data transmission method according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of another data transmission method according to an embodiment of the present invention;
fig. 8 is a timing diagram of a data transmission method according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present invention.
Detailed Description
In the following, some terms in the embodiments of the present invention are explained to facilitate understanding by those skilled in the art:
a base station: a Radio Access Network (RAN) device, which is a device for accessing a terminal to a wireless Network, may be a base Station (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), a base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB or eNodeB) in Long Term Evolution (LTE), a relay Station or Access point, or a base Station in a future 5G Network, and the like, and is not limited herein.
A terminal: which may be wireless or wireline, and which may be a device providing voice and/or other traffic data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an access Terminal (access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Equipment (User device User Equipment), which are not limited herein.
In the embodiments of the present invention, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Fig. 1 is a block diagram of a communication system. As shown in fig. 1, the communication system includes: base station 01 and terminal 02.
In the Long Term Evolution (LTE) technology, as eMTC is researched, eMTC needs to support Voice LTE (Voice LTE), that is, eMTC is used to transmit a Voice packet of Voice LTE. The enhanced volte (evolte) supports an uplink asynchronous Hybrid Automatic Repeat request (HARQ).
If the VoLTE voice packet is transmitted according to the existing preset transmission rule, the voice packet may be transmitted at a fixed period interval, where the voice packet may have both uplink packet and downlink packet transmission, or only the uplink packet or only the downlink packet is transmitted within a certain time interval, which may result in that there is no uplink packet transmission or no downlink packet transmission on some subframes, and thus resource waste is caused.
The embodiment of the invention provides a method for flexibly and variably indicating a transmission interval by a base station so as to reduce resource waste. Specifically, the base station may indicate the relevant information of the transmission interval in the downlink control information, so that the terminal may flexibly obtain the transmission interval according to the downlink control information. The downlink control information may include: downlink assignment information, uplink grant information, and the like, which are not limited herein.
Fig. 2 is a schematic flow chart of a data transmission method according to an embodiment of the present invention, and as shown in fig. 2, the method includes:
s201, the base station sends uplink permission information to the terminal.
The base station may send uplink Grant information (UL Grant) on the MPDCCH.
The uplink grant information is used for a grant for uplink scheduling.
S202, the terminal receives the uplink permission information sent by the base station and determines the transmission interval according to the uplink permission information.
Optionally, the base station may directly indicate the transmission interval in the uplink grant information, and may also indicate other related information, so that the terminal may obtain the transmission interval according to the related information, which is not limited herein.
Wherein the count unit of the transmission interval may be TTI.
S203, after receiving the uplink grant information, the terminal transmits uplink data to the base station according to the transmission interval.
The data transmitted here may be VoLTE voice packets, but is not limited thereto.
In this embodiment, the terminal receives the uplink grant information sent by the base station, determines the transmission interval according to the uplink grant information, and further transmits uplink data to the base station according to the transmission interval, so that the transmission interval is flexibly determined according to the information sent by the base station, and resource waste is reduced.
Optionally, the uplink grant information directly carries the transmission interval.
The terminal receives the uplink grant information sent by the base station, and determines a transmission interval according to the uplink grant information, which may be: the terminal receives uplink permission information sent by the base station, wherein the uplink permission information comprises: and a transmission interval k, wherein the number of TTIs of the indication interval is k. And the terminal determines the last subframe n of the uplink permission information transmission and acquires a transmission interval k according to the uplink permission information.
Accordingly, after receiving the uplink grant information, the terminal starts to transmit uplink data on a subframe n to a subframe k after the transmission interval k. If the subframe n represents the nth subframe, uplink data transmission starts on the (n + k + 1) th subframe.
Optionally, the uplink grant information may also indicate an uplink scheduling delay k1, where the uplink scheduling delay k1 is 1 greater than the transmission interval k, i.e., if the subframe n represents the nth subframe, the transmission of uplink data is started on the nth + k1 subframes.
n is an integer greater than or equal to 0, and k is an integer greater than or equal to 3.
Optionally, the uplink grant information may also carry other information for the terminal to calculate the transmission interval instead of directly carrying the transmission interval.
Optionally, before receiving the uplink grant information transmitted by the base station, the terminal also receives downlink Assignment information (DL Assignment) transmitted by the base station. The downlink allocation information includes: and the downlink transmission time length x is an integer greater than 0. x may also be counted in units of TTIs, i.e., x TTIs are downlink transmitted.
Fig. 3 is a schematic flow chart of another data transmission method according to an embodiment of the present invention, and fig. 4 is a schematic timing diagram of the data transmission method according to the embodiment of the present invention. Referring to fig. 4, in this embodiment, the terminal receives the uplink grant information first and then receives the downlink data.
As shown in fig. 3, the method includes:
s301, the terminal receives downlink allocation information sent by the base station.
The downlink allocation information includes: the downlink transmission duration x. The terminal takes x +1 as the transmission interval.
Optionally, the terminal monitors downlink allocation information on the MPDCCH.
The Downlink allocation Information may be indicated by Downlink Control Information (DCI). The downlink transmission length may be determined by a repetition number (repetition number) in the DCI.
S302, the terminal receives the uplink permission information sent by the base station and determines the last subframe n of the uplink permission information transmission.
The uplink grant information may carry the number of repetitions of itself; the downlink scheduling delay is directly determined by the repetition number of the uplink permission information.
And S303, the terminal receives the downlink data with the length of x sent by the base station.
Specifically, the base station may transmit downlink data on a Physical Downlink Shared Channel (PDSCH).
And S304, the terminal starts to transmit uplink data on the subframe with the backward interval x +1 of the subframe n.
Referring to fig. 4, a subframe n spaced backward by x +1 subframes is a starting point for transmitting uplink data in a Physical Uplink Shared Channel (PUSCH).
If the subframe n represents the nth subframe, uplink data transmission starts on the (n + x +2) th subframe.
As shown in fig. 4, the subframe numbers are 0 to 9 in one cycle, and if the last subframe number of the uplink grant information transmission is n, the uplink data transmission is started on the subframe number "(n + x + 2)% 10" after the subframe number n. Wherein "%" is a remainder symbol.
Taking fig. 4 as an example, the downlink allocation information is received from the first subframe numbered 0, the downlink allocation information is received at the end of the subframe numbered 3, the uplink grant information is received at the end of n-7, and x-4, and the method described above is used to obtain that the uplink data transmission is started at the next subframe numbered 3. The subframe 2 vacated in the middle is an interval (gap) between uplink transmission and downlink transmission.
Further, the terminal may start to transmit uplink control information on a subframe spaced backward by x +3 subframes in the subframe n, and specifically may transmit the uplink control information on the PDCCH. The uplink control information may be used to feed back whether the downlink data is received to the base station, and specifically, the uplink control information may be ACK (successful reception) or NACK (non-reception). As shown in fig. 4, the second subframes with numbers 5 and 6 transmit uplink control information, and uplink data continues to be transmitted from the second subframe with number 7, so that there is no waste of resources.
It should be noted that, during the process of transmitting the uplink control information, the transmission of the uplink data is stopped, and the transmission of the uplink data is continued after the transmission of the uplink control information is completed.
Fig. 5 is a schematic flow chart of another data transmission method according to an embodiment of the present invention, and fig. 6 is a schematic timing diagram of the data transmission method according to the embodiment of the present invention. Referring to fig. 6, in this embodiment, the terminal receives the downlink data first and then receives the uplink grant information. Physical downlink shared Channel (Physical DL Share Channel, PDSCH for short)
As shown in fig. 5, the method includes:
s501, the terminal receives downlink allocation information sent by the base station.
The downlink allocation information includes: the downlink transmission duration x.
S301 may be referred to specifically, and will not be described herein again.
S502, the terminal receives the downlink data with the length of x sent by the base station and determines the last subframe m of the downlink data transmission.
The terminal can know from which subframe to start receiving downlink data, and can know from x that subframe to finish receiving downlink data. The terminal may also directly determine the last subframe to receive downlink data, which is not limited herein.
S503, the terminal receives the uplink permission information sent by the base station and determines the transmission duration f of the uplink permission information. Thus, the transmission interval is f +1
f is an integer greater than 0. f can also be counted in units of TTIs, i.e. the transmission length is f TTIs, occupying f subframes.
The transmission duration f of the uplink grant information may be calculated from a difference between a time point at which the reception of the uplink grant information starts and a time point at which the reception of the uplink grant information ends.
The uplink grant information may be carried by the DCI, that is, the terminal calculates and obtains the transmission duration f according to a difference between a time point at which the DCI starts to be received and a time point at which the DCI finishes to be received.
Or the transmission duration f may be obtained from the number of repetitions carried by the uplink grant information itself.
S504, the terminal starts to transmit the uplink control information in the subframe m to the subframe with the back interval of f +1, and transmits the uplink data after the transmission of the uplink control information is finished. After the transmission of the uplink control information is finished, the uplink data is directly transmitted in the next subframe without an interval in the middle.
If the subframe m represents the mth subframe, transmission of uplink control information starts on the (m + f +2) th subframe.
Referring to fig. 6, the subframe numbers are one cycle of 0 to 9, and if a subframe m denotes a subframe number m, transmission of uplink control information starts on a subframe number of "(m + f + 2)% 10" after the subframe number m. Wherein "%" is a remainder symbol.
Taking fig. 6 as an example, the downlink allocation information is received from the first subframe with the number 0, the downlink allocation information is received at the end of the subframe with the number 3, and then the downlink data is received, the downlink data is received at the end of the subframe with the number 8, the uplink grant information is received at the beginning, the transmission duration of the uplink grant information is 4 TTIs, the uplink control information is transmitted at the beginning of the next subframe with the number 4, the uplink control information is transmitted at the end of 2 TTIs, and the uplink data is transmitted at the beginning of the subframe with the number 6. The subframe 3 vacated in the middle is an interval (gap) between uplink transmission and downlink transmission.
Wherein, the uplink permission information and the downlink allocation information both belong to the downlink control information.
It can be understood that the terminal receives the downlink control information sent by the base station and determines the transmission interval according to the downlink control information.
The uplink asynchronous HARQ transmission requires that the terminal and the base station understand the same for the current HARQ process number, i.e. the terminal and the base station need to keep consistent for the current uplink transmission HARQ process number. For this reason, the terminal needs to receive DCI with HARQ process number, that is, to support asynchronous HARQ, the terminal needs to be able to monitor DCI transmitted by the base station on MPDCCH. In VoLTE, Semi-Persistent Scheduling (SPS) may be used, and this embodiment provides a processing method for a terminal to monitor DCI on an MPDCCH in a time period when a PDSCH transmits data in Semi-Persistent Scheduling.
Fig. 7 is a schematic flowchart of another data transmission method according to an embodiment of the present invention, and fig. 8 is a schematic timing diagram of the data transmission method according to the embodiment of the present invention.
As shown in fig. 7, the method includes:
s701, the terminal performs blind detection on DCI on a subframe configured with an MPDCCH candidate (MPDCCH candidates) identifier in a preset subframe, and receives downlink data in the preset subframe at the same time.
And the preset subframe is a subframe which is allocated by the base station according to the SPS and is used for downlink data transmission.
Alternatively, the base station may configure MPDCCH candidates in some subframes of the preset subframes in advance, and generally configure MPDCCH candidates in the first several subframes of the preset subframes, which is not limited herein. The preset subframes are downlink resources (downlink subframes) allocated by the SPS, and downlink data is transmitted on the subframes by using the PDSCH.
And the terminal blindly detects the DCI on the subframe configured with the MPDCCH candidate identification, or blindly detects the DCI on the subframe possibly configured with the MPDCCH candidate identification. The general terminal may consider that the MPDCCH candidate identifiers are configured on the first several subframes of the preset subframe.
The DCI contains a HARQ process number.
S702 and S703 are two cases in parallel:
s702, when the total amount of the frequency domain resources occupied by the data and the downlink control information transmitted on the subframe configured with the MPDCCH candidate identification is less than or equal to the capacity of the current narrow-band channel, the terminal analyzes the downlink data and the downlink control information.
In this case, the terminal may receive the downlink data and the DCI at the same time, and decode the downlink data and the DCI.
S703, when the total amount of frequency domain resources occupied by the data and downlink control information transmitted on the subframe configured with the MPDCCH candidate identifier is larger than the capacity of the current narrowband channel, if the blind detection DCI fails, the terminal only analyzes the downlink data; and if the DCI is successfully blind-checked, the terminal simultaneously analyzes the downlink data and the DCI.
In this case, the terminal still monitors the MPDCCH according to the attempt, and only receives and decodes the downlink data if the blind detection fails, and can decode the downlink data and the DCI if the blind detection succeeds.
As shown in fig. 8, with 40ms as a data transmission period, assuming that the total amount of frequency domain resources occupied by data and downlink control information transmitted on a subframe configured with an MPDCCH candidate identifier is less than or equal to the capacity of a current narrowband channel, a plurality of shaded subframes in a downlink transmission subframe allocated by an SPS represent subframes configured with an MPDCCH candidate identifier, terminals at positions of the subframes receive and decode downlink data and DCI simultaneously, and a subframe not configured with an MPDCCH candidate identifier at the back only receives and decodes downlink data. After receiving the downlink data, the terminal may send uplink control information to feed back whether the downlink data is successfully received to the base station, and after the uplink control information is sent, the terminal may transmit the uplink data, for example, transmit a voice packet, and the like, without limitation.
In this embodiment, if a certain condition is satisfied, DCI on an MPDCCH may also be monitored in a data transmission time period, that is, DCI may also be received while downlink data is received.
Fig. 9 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention, which may be integrated in the terminal, as shown in fig. 9, the apparatus includes: a processor 901, a memory 902, interface circuitry 903, and a bus 904.
The processor 901, memory 902, and interface circuit 903 are coupled by a bus 904 and communicate with each other. The processor 901 receives or transmits information, such as control information, data, and the like, through the interface circuit 903.
Wherein, a group of program codes is stored in the memory 902, and the processor 901 calls the program codes stored in the memory 902 to execute the following operations:
receiving uplink permission information sent by a base station, and determining a transmission interval according to the uplink permission information;
and after receiving the uplink permission information, transmitting uplink data to the base station according to the transmission interval.
Optionally, the processor 901 is specifically configured to receive uplink grant information sent by the base station, where the uplink grant information includes: a transmission interval k for indicating the number of the interval of the shortest transmission interval TTI; determining the last subframe n of the uplink permission information transmission, and acquiring the transmission interval k according to the uplink permission information, wherein n is an integer greater than or equal to 0, and k is an integer greater than or equal to 3; and after receiving the uplink permission information, starting to transmit the uplink data on the subframe of the subframe n backward interval k according to the transmission interval.
Further, the processor 901 is further configured to receive downlink assignment information sent by a base station before receiving uplink grant information sent by the base station, where the downlink assignment information includes: and the downlink transmission time length x is an integer greater than 0.
In one embodiment, when the apparatus receives the uplink grant information first and then receives downlink data, the processor 901 is specifically configured to receive the uplink grant information sent by the base station and determine a last subframe n of transmission of the uplink grant information; x +1 is taken as the transmission interval.
Optionally, the processor 901 is specifically configured to, after receiving the uplink grant information, start to transmit uplink data on a subframe of the subframe n with a backward interval x +1 according to the transmission interval.
The processor 901 is further configured to start transmitting uplink control information on a subframe of a backward interval x +3 of a subframe n, where the transmission of the uplink data is stopped during the transmission of the uplink control information, and the transmission of the uplink data is continued after the transmission of the uplink control information is completed.
Optionally, in another embodiment, the processor 901 is further configured to receive downlink data sent by the base station before receiving uplink grant information sent by the base station and determining a transmission interval according to the uplink grant information; and determining the last subframe m of the downlink data transmission according to the downlink transmission time length x.
Optionally, the processor 901 is specifically configured to receive the uplink grant information sent by the base station, and determine a transmission duration f of the uplink grant information, where f is an integer greater than 0; and determining the transmission interval to be f +1 according to the transmission duration f of the uplink permission information.
Optionally, the processor 901 is specifically configured to, after receiving the uplink grant information, start transmitting uplink control information in a subframe m at a back interval f +1, and transmit the uplink data after the uplink control information is completely transmitted.
The implementation principle and technical effect of the device are similar to those of the method embodiments shown in fig. 1 to 6, and are not described herein again.
In another data transmission apparatus according to the embodiment of the present invention, the processor 901 calls the program code stored in the memory 902 to execute the following operations, which are the same as the structure shown in fig. 9: the method comprises the steps of blind detecting downlink control information on a subframe configured with a machine type communication physical downlink control channel (MPDCCH) candidate identifier in a preset subframe, and receiving downlink data in the preset subframe at the same time, wherein the preset subframe is a subframe which is distributed by a base station according to semi-static scheduling and is used for transmitting the downlink data;
when the total amount of frequency domain resources occupied by data and downlink control information transmitted on the subframe configured with the MPDCCH candidate identifier is less than or equal to the capacity of a current narrowband channel, analyzing the downlink data and the downlink control information; alternatively, the first and second electrodes may be,
when the total amount of frequency domain resources occupied by data and downlink control information transmitted on the subframe configured with the MPDCCH candidate identifier is larger than the capacity of the current narrowband channel, if blind detection of the downlink control information fails, analyzing the downlink data; and if the downlink control information is successfully blind-checked, analyzing the downlink data and the downlink control information.
The implementation principle and technical effect of the device are similar to those of the method embodiments shown in fig. 7-8, and are not described herein again.
The structure of the base station in the foregoing embodiment can also refer to fig. 9, and is not described herein again.
Fig. 10 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present invention, which may be integrated in the terminal, as shown in fig. 10, the apparatus includes: a receiving module 110, a determining module 111, and a transmitting module 112, wherein,
a receiving module 110, configured to receive uplink grant information sent by a base station.
A determining module 111, configured to determine a transmission interval according to the uplink grant information.
A sending module 112, configured to transmit uplink data to the base station according to the transmission interval after the uplink grant information is received.
Optionally, the receiving module 110 is specifically configured to receive uplink grant information sent by the base station, where the uplink grant information includes: and the transmission interval k is used for indicating the number of the shortest transmission intervals TTI of the interval.
The determining module 111 is specifically configured to determine a last subframe n of the uplink grant information transmission, and obtain the transmission interval k according to the uplink grant information, where n is an integer greater than or equal to 0, and k is an integer greater than or equal to 3.
The sending module 112 is specifically configured to, after the uplink grant information is received, start to transmit the uplink data on a subframe of the subframe n to a next interval k according to the transmission interval.
Further, the receiving module 110 is further configured to receive downlink allocation information sent by a base station before receiving uplink grant information sent by the base station, where the downlink allocation information includes: and the downlink transmission time length x is an integer greater than 0.
In one embodiment, the apparatus receives the uplink grant information first and then receives the downlink data,
the determining module 111 is specifically configured to determine the last subframe n of the uplink grant information transmission, and use x +1 as a transmission interval.
Accordingly, the sending module 112 is specifically configured to, after the uplink grant information is received, start to transmit uplink data on a subframe of the subframe n with a backward interval x +1 according to the transmission interval.
Further, the sending module 112 is further configured to start transmitting uplink control information on a subframe of the subframe n with a backward interval x +3, where the transmission of the uplink data is stopped during the transmission of the uplink control information, and the transmission of the uplink data is continued after the transmission of the uplink control information is completed.
In another embodiment, the receiving module 110 is further configured to receive downlink data sent by the base station before receiving the uplink grant information sent by the base station. The determining module 111 is further configured to determine a last subframe m of the downlink data transmission according to the downlink transmission duration x.
Further, the determining module 111 is specifically configured to determine a transmission duration f of the uplink grant information, where f is an integer greater than 0; and determining the transmission interval to be f +1 according to the transmission duration f of the uplink permission information.
Correspondingly, the sending module 112 is specifically configured to, after the uplink grant information is received, start to transmit uplink control information in the subframe m to the subframe with the back interval f +1, and transmit the uplink data after the uplink control information is transmitted.
The implementation principle and technical effect of the device are similar to those of the method embodiments shown in fig. 1 to 6, and are not described herein again.
Fig. 11 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present invention, which may be integrated in the terminal, as shown in fig. 11, the apparatus includes: a receiving module 001 and an analyzing module 002, wherein,
the receiving module 001 is configured to perform blind detection on downlink control information on a subframe configured with an MPDCCH candidate identifier in a preset subframe, and receive downlink data in the preset subframe at the same time, where the preset subframe is a subframe allocated by a base station according to semi-persistent scheduling and used for downlink data transmission.
When the total amount of frequency domain resources occupied by the data and the downlink control information transmitted on the subframe configured with the MPDCCH candidate identifier is smaller than or equal to the capacity of the current narrowband channel, the analyzing module 002 analyzes the downlink data and the downlink control information.
Alternatively, the first and second electrodes may be,
when the total amount of frequency domain resources occupied by the data and the downlink control information transmitted on the subframe configured with the MPDCCH candidate identifier is greater than the capacity of the current narrowband channel, if the receiving module 001 fails to blindly detect the downlink control information, the analyzing module 002 analyzes the downlink data. If the receiving module 001 successfully performs blind detection on the downlink control information, the analyzing module 002 analyzes the downlink data and the downlink control information.
The implementation principle and technical effect of the device are similar to those of the method embodiments shown in fig. 7-8, and are not described herein again.
It should be noted that the division of the modules of the above apparatus is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the determining module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the determining module is called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (16)
1. A method of data transmission, comprising:
a terminal receives uplink permission information sent by a base station and determines a transmission interval according to the uplink permission information;
after the terminal receives the uplink permission information, the terminal transmits uplink data to the base station according to the transmission interval;
the method for receiving the uplink grant information sent by the base station and determining the transmission interval according to the uplink grant information by the terminal includes:
the terminal receives uplink permission information sent by the base station, wherein the uplink permission information comprises: a transmission interval k for indicating the number of the interval of the shortest transmission interval TTI;
the terminal determines the last subframe n of the uplink permission information transmission and acquires the transmission interval k according to the uplink permission information, wherein n is an integer greater than or equal to 0, and k is an integer greater than or equal to 3;
after the terminal receives the uplink grant information, the terminal transmits uplink data to the base station according to the transmission interval, including:
and after the terminal receives the uplink permission information, the terminal starts to transmit the uplink data on the subframe of the backward interval k from the subframe n according to the transmission interval.
2. The method of claim 1, wherein before the terminal receives the uplink grant information sent by the base station, the method further comprises:
the terminal receives downlink allocation information sent by the base station, wherein the downlink allocation information comprises: and the downlink transmission time length x is an integer greater than 0.
3. The method of claim 2, wherein when the terminal receives the uplink grant information first and then receives downlink data,
the terminal receives uplink permission information sent by a base station, and determines a transmission interval according to the uplink permission information, and the method comprises the following steps:
the terminal receives uplink permission information sent by a base station and determines the last subframe n of the uplink permission information transmission;
x +1 is taken as the transmission interval.
4. The method of claim 3, wherein the terminal transmits uplink data to the base station according to the transmission interval after receiving the uplink grant information, and wherein the method comprises:
and after the terminal receives the uplink permission information, the terminal starts to transmit uplink data on the subframe with the backward interval x +1 of the subframe n according to the transmission interval.
5. The method of claim 4, wherein after starting transmission of uplink data on the subframe n with the backward interval x +1, further comprising:
and the terminal starts to transmit uplink control information on a subframe with a backward interval x +3 of a subframe n, wherein the uplink data is stopped being transmitted in the process of transmitting the uplink control information, and the uplink data is continuously transmitted after the transmission of the uplink control information is finished.
6. The method of claim 2, wherein the terminal receives uplink grant information sent by a base station, and before determining a transmission interval according to the uplink grant information, the method further comprises:
the terminal receives downlink data sent by the base station;
and the terminal determines the last subframe m of the downlink data transmission according to the downlink transmission time length x.
7. The method of claim 6, wherein the terminal receives uplink grant information sent by a base station and determines a transmission interval according to the uplink grant information, and the method comprises:
the terminal receives the uplink permission information sent by the base station and determines the transmission duration f of the uplink permission information, wherein f is an integer greater than 0;
and the terminal determines the transmission interval to be f +1 according to the transmission duration f of the uplink permission information.
8. The method of claim 7, wherein the terminal transmits uplink data to the base station according to the transmission interval after receiving the uplink grant information, and wherein the method comprises:
and after the terminal receives the uplink permission information, the terminal starts to transmit uplink control information to a subframe with a backward interval f +1 in the subframe m, and transmits the uplink data after the transmission of the uplink control information is finished.
9. A data transmission apparatus, comprising: a memory and a processor;
the memory is used for storing program codes, and the processor is used for calling the program codes in the memory to execute the following operations:
receiving uplink permission information sent by a base station, and determining a transmission interval according to the uplink permission information;
after receiving the uplink permission information, transmitting uplink data to the base station according to the transmission interval;
the processor is specifically configured to receive uplink grant information sent by the base station, where the uplink grant information includes: a transmission interval k for indicating the number of the interval of the shortest transmission interval TTI; determining the last subframe n of the uplink permission information transmission, and acquiring the transmission interval k according to the uplink permission information, wherein n is an integer greater than or equal to 0, and k is an integer greater than or equal to 3; and after receiving the uplink permission information, starting to transmit the uplink data on the subframe of the subframe n backward interval k according to the transmission interval.
10. The apparatus of claim 9, wherein the processor is further configured to receive downlink assignment information sent by a base station before receiving uplink grant information sent by the base station, and wherein the downlink assignment information comprises: and the downlink transmission time length x is an integer greater than 0.
11. The apparatus according to claim 10, wherein when the apparatus receives the uplink grant information first and then receives the downlink data, the processor is specifically configured to receive the uplink grant information sent by the base station, and determine a last subframe n of transmission of the uplink grant information; x +1 is taken as the transmission interval.
12. The apparatus of claim 11, wherein the processor is specifically configured to start transmission of uplink data at a subframe n spaced back by x +1 according to the transmission interval after receiving the uplink grant information.
13. The apparatus of claim 12, wherein the processor is further configured to start transmission of uplink control information at a subframe n separated by x +3 backward, and wherein the transmission of the uplink data is stopped during the transmission of the uplink control information and is continued after the transmission of the uplink control information is completed.
14. The apparatus of claim 10, wherein the processor is further configured to receive downlink data sent by a base station before receiving uplink grant information sent by the base station and determining a transmission interval according to the uplink grant information; and determining the last subframe m of the downlink data transmission according to the downlink transmission time length x.
15. The apparatus of claim 14, wherein the processor is specifically configured to receive the uplink grant information sent by the base station, and determine a transmission duration f of the uplink grant information, where f is an integer greater than 0; and determining the transmission interval to be f +1 according to the transmission duration f of the uplink permission information.
16. The apparatus of claim 15, wherein the processor is specifically configured to start transmission of uplink control information in the subframe m to a subframe with a back interval f +1 after the uplink grant information is received, and to transmit the uplink data after the uplink control information is completely transmitted.
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| CN202011073561.6A CN112203260B (en) | 2016-11-03 | 2016-11-03 | Data transmission method and device |
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| CN108024233A (en) | 2018-05-11 |
| CN112203260B (en) | 2022-05-10 |
| CN112203260A (en) | 2021-01-08 |
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