JP2020017988A - Method and terminal for data transfer - Google Patents

Abstract

To provide a method and a terminal performing data transfer by using many types of TTI in the same carrier.SOLUTION: A terminal determines different PDSCH and/or PUSCH transferred by using more than one different TTIs in a target carrier, on the basis of configuration information transmitted by a base station. The terminal detects whether or not a first DCI exists in the PDCCH of a target subframe in the target carrier, and detects the dedicated DCI of the dedicated downlink control channel in the target downlink subframe, when the first DCI does not exist, or when the first DCI exists but the TTI of the PDSCH scheduled by the first DCI is shorter than the target subframe.EFFECT: Since the terminal performs scheduling dynamically so as to transfer data by using different TTIs, dissipation of resources can be circumvented.SELECTED DRAWING: Figure 1

Description

  The present invention relates to the field of communications, and in particular, to a method and a terminal for data transmission.

  In the future communication technology, with the continuous development of air interface technology and applications, delay reduction has become one important performance index, for example, real-time remote computing for mobile terminals. ) Is required to have an end-to-end delay of less than 10 ms, and the delay of efficiency and traffic efficiency and safety is required to be 5 ms, as opposed to the current Long Term Evolution (LTE). ") (Transmission Time Interval, abbreviated as" TTI "). It is ms.

  One important technique for reducing transmission delay is to reduce TTI, since data processing and decoding delay are primarily related to TTI length. LTE-A Rel-13 is currently studying data transmission using shorter TTIs. As an advantage of the short TTI, transmission delay can be reduced, but control signaling overhead is high and spectrum efficiency is lowered. For example, if a terminal having many service types attempts to determine a unified TTI based on a service requiring the shortest delay, release waste is caused, and a carrier that supports transmission in a short TTI is used. In this case, compatibility with the current LTE system cannot be ensured, that is, 1 ms TTI cannot be met.

  The present invention provides a method and a terminal for data transmission capable of performing data transmission using many types of TTIs on the same carrier.

  A first aspect provides a method for data transmission, wherein a terminal transmits using at least two different TTIs on a target carrier based on configuration information transmitted by a base station. Determining a physical downlink shared channel (PDSCH) and / or a different physical uplink shared channel (PUSCH), and the terminal performs a first downlink on a physical downlink control channel (PDCCH) of a target subframe on the target carrier. Detecting whether or not link control information (DCI) is present, the terminal determines whether the first DCI is not present on the PDCCH of the target subframe, or the terminal determines whether the first DCI is present on the PDCCH of the target subframe. A first DCI exists and is scheduled by the first DCI Detecting a dedicated downlink control channel in the target downlink subframe if the length of the TTI of the PDSCH to be transmitted is less than the length of the target subframe, wherein the first DCI is the target carrier. Is used to schedule the PDSCH transmitted in the target subframe in, the dedicated control channel includes a dedicated DCI, and the TTI of the PDSCH or PUSCH scheduled by the dedicated DCI is smaller than the length of the target subframe.

  Thus, according to the method for data transmission of the embodiment of the present invention, the terminal can transmit on different PDSCH and / or different PUSCH using at least two types of TTIs on the same carrier, By dynamically scheduling the terminal to perform data transmission using different TTIs, it is possible to improve resource utilization.

  Referring to the first form, in one implementation scheme of the first form, the method comprises the step of: wherein the terminal has the first DCI on the PDCCH of the target subframe and uses the first DCI If detecting that the transmission time interval (TTI) of the scheduled PDSCH is greater than or equal to the length of the target subframe, receiving the PDSCH scheduled by the first DCI.

  With reference to the first mode and the above-described realization scheme, in another realization scheme of the first mode, the terminal may detect a second DCI in a PDCCH of a target subframe on the target carrier, The second DCI is used for scheduling PUSCH.

  With reference to the first embodiment and its implementation, in another implementation of the first embodiment, the target subframe is a downlink subframe or a special subframe of a time division duplex (TDD) system.

  With reference to the first form and its realization scheme, in another realization scheme of the first form, the terminal may transmit first downlink control information (DCI) on a physical downlink control channel (PDCCH) of a target subframe. Detecting whether or not exists, the terminal includes detecting whether or not the first DCI exists in a common search space (CSS) of the PDCCH of the target subframe; The length of the TSCH of the PDSCH scheduled by the first DCI is equal to the length of the target subframe, or equal to the length of the longest TTI of the at least two different TTIs, or of the at least two different TTIs. It is equal to the length of the shortest TTI.

  With reference to the first form and its realization scheme, in another realization scheme of the first form, the terminal may transmit first downlink control information (DCI) on a physical downlink control channel (PDCCH) of a target subframe. Detecting whether or not is present includes detecting whether or not the first DCI is present in a terminal-specific search space (USS) of the PDCCH of the target subframe, The first DCI includes a specific information domain, and the specific information domain is used to indicate a TTI length of the PDSCH scheduled by the first DCI.

  With reference to the first embodiment and the above-described realization scheme, in another realization scheme of the first embodiment, when the terminal transmits on the different PDSCH using the at least two different TTIs, the terminal performs hybrid automatic transmission of the different PDSCH. The process number of the retransmission request (HARQ) is set by each user.

  With reference to the first embodiment and the above-mentioned realization method, in another realization method of the first embodiment, the HARQ process number is indicated by a HARQ process number information domain in the first DCI, and the HARQ process number information domain The length of the HARQ process number information domain is determined as 4 bits, or the length of the at least two different TTIs currently used by the terminal and the current usage of the target carrier are determined. Determine the maximum number of currently supported HARQ processes of the terminal based on the current TDD uplink / downlink configuration, and determine the length of the HARQ process number information domain based on the actually supported maximum number of HARQ processes. Or based on the maximum number of HARQ processes supported by the TDD system. Determining the length of the HARQ process number information domain by using the TDD system to transmit on different PDSCH and / or different PUSCH using at least two different TTIs on the same carrier, or , The length of the HARQ process number information domain is determined based on the maximum number of HARQ processes supported by.

  With reference to the first embodiment and its implementation, in another implementation of the first embodiment the transmission modes corresponding to different PDSCHs transmitted in the at least two different TTIs are different and / or the at least two Transmission modes corresponding to different PUSCHs transmitted in two different TTIs are different.

  With reference to the first mode and the above-described realization scheme, in another realization mode of the first mode, the first DCI exists in the USS, and the TTI of the PDSCH scheduled by the first DCI is If the length is smaller than the length of the target subframe, the format of the first DCI is 1A.

  With reference to the first embodiment and its implementation, in another implementation of the first embodiment, the USS of the target subframe includes a second DCI, and the second DCI schedules a PUSCH And the TTI length of the PUSCH scheduled by the second DCI is smaller than the length of the target subframe, and the format of the second DCI is zero.

  With reference to the first embodiment and its implementation, in another implementation of the first embodiment the transmission modes corresponding to different PDSCHs transmitted in the at least two different TTIs are different and / or the at least two The transmission mode corresponding to different PUSCHs transmitted in two different TTIs is the same, which can ensure that the number of blind detections on the PDCCH does not increase.

  A second aspect provides a terminal for data transmission to perform the method of the first aspect or any possible realization of the first aspect. Specifically, the apparatus comprises a unit for performing the method of the first aspect or any possible realization of the first aspect.

4 is a flowchart of a method for data transmission according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a HARQ process number according to an embodiment of the present invention; FIG. 4 is a block diagram of a terminal for data transmission according to an embodiment of the present invention.

  In order to more clearly describe embodiments of the present invention, the drawings necessary for the description of the embodiments or the prior art have been briefly described above, and the drawings described above are merely examples of the present invention. These drawings are merely examples and other drawings can be obtained based on these drawings without any creative effort for those skilled in the art.

FIG. 1 shows a flowchart of a method 100 for data transmission according to an embodiment of the present invention, which method 100 is performed by a base station and a terminal. As shown in FIG. 1, the method 100 includes S110 to S130. In S110, the base station transmits configuration information to the terminal.

  Specifically, the base station transmits configuration information to the terminal, and after receiving the configuration information, based on the configuration information, the terminal can transmit using at least two different TTIs in the target carrier. Establish a different physical downlink shared channel (abbreviated as "PDSCH") and / or a different physical uplink shared channel (abbreviated as "Physical Uplink Shared Channel," PUSCH).

  In S120, the terminal may receive the target subframe transmitted by the base station on the target carrier, detect the PDCCH of the received target subframe, and may detect a dedicated control channel of the target subframe, Thereby, the length of the TTI for transmitting data in the target carrier is determined, and the target subframe may be a downlink subframe, or may be a time division duplex (Time Division Duplexing, abbreviated as “TDD”). It may be a special subframe of the system.

  In an embodiment of the present invention, different TTIs may be scheduled by different DCIs and different TTIs may be indicated by newly adding a TTI indication domain to the DCI, or a cyclic redundancy check of the DCI may be performed. Using a different scrambling sequence for "CRC") or using a temporary identity (Radio Network Temporary Identity, "RNTI") of a different wireless network, or other schemes, In any case, the terminal can dynamically indicate which TTI to use, and embodiments of the present invention are not limited to this.

  Specifically, the terminal transmits first downlink control information (Downlink Control Information, “DCI”) on a physical downlink control channel (Physical Downlink Control Channel, “PDCCH”) of a target subframe in the target carrier. The first DCI is used to schedule a PDSCH transmitted in a target subframe on the target carrier.

  Optionally, in one embodiment, the terminal detects the first DCI on a PDCCH, and a TSCH length of a PDSCH scheduled by the first DCI is equal to or longer than the target subframe. Receiving the PDSCH scheduled by the first DCI based on a TTI length of the PDSCH scheduled by the first DCI, and further comprising the terminal detecting a dedicated control channel in the target subframe. Stopping, the dedicated control channel is used for transmitting a dedicated DCI, the dedicated DCI is used for scheduling a PDSCH or a PUSCH, and a length of a PDSCH or PUSCH TTI scheduled by the dedicated DCI. Is the length of the target subframe Smaller.

  Optionally, in one embodiment, the terminal detects the first DCI on a PDCCH and if the length of the TTI of the PDSCH scheduled by the first DCI is smaller than the target subframe, Based on the TTI length of the PDSCH scheduled by the first DCI, the terminal receives the PDSCH scheduled by the first DCI, and the terminal continues a dedicated control channel in the target subframe. Detecting, the dedicated control channel is used to transmit a dedicated DCI, the dedicated DCI is used to schedule a PDSCH or a PUSCH, and the TTI length of the PDSCH or PUSCH scheduled by the dedicated DCI is The length of the target subframe Ri small. When the terminal detects the dedicated DCI, the terminal transmits the PDSCH or PUSCH to the base station based on the length of the PDTI or PUSCH TTI scheduled by the dedicated DCI. If the dedicated DCI has not been detected, the terminal may continue to detect the next subframe, and similarly detect the PDCCH of the next subframe.

  Also, as one embodiment, when the first DCI is not detected on the PDCCH, the terminal continuously detects a dedicated control channel in the target subframe, and the dedicated control channel transmits the dedicated DCI. The dedicated DCI is used to schedule a PDSCH or a PUSCH, and the TTI length of the PDSCH or PUSCH scheduled by the dedicated DCI is smaller than the length of the target subframe. When the terminal detects the dedicated DCI, the terminal transmits the PDSCH or PUSCH to the base station based on the length of the PDTI or PUSCH TTI scheduled by the dedicated DCI. If the dedicated DCI has not been detected, the terminal may continue to detect the next subframe, and similarly detect the PDCCH of the next subframe.

  Further, if the first DCI has not been detected on the PDCCH and the terminal has detected a second DCI for scheduling a PUSCH, the terminal is scheduled to a base station by the second DCI. The PUSCH is transmitted.

  In an embodiment of the present invention, the first DCI or the second DCI may be located in a common search space (CSS) of the PDCCH. Since the size of the DCI in the CSS of the PDCCH cannot be freely changed, that is, a new TTI indicating domain cannot be added, the specific length of the TTI is indicated using the DCI in the CSS. Can not be set in advance, for example, because the DCI in the CSS schedules the PDSCH or PUSCH to be transmitted using the length of the regular TTI, the regular TTI equal to the length of the target subframe Of the at least two different TTIs supported by the terminal for presetting the length of the terminal or for scheduling the PDSCH or PUSCH to be transmitted using the minimum or maximum TTI length in the CSS. Reserve the minimum or maximum TTI length, which is the minimum or maximum TTI length. Set to.

  In an embodiment of the present invention, the first DCI or the second DCI may be located in a terminal-specific search space (USS) on the PDCCH, and the scheduling of the DCI in the USS may be used for the available PDSCH or PUSCH. The length of the TTI may be smaller than the length of the target subframe, may be equal to the length of the target subframe, or may be larger than the length of the target subframe. Not limited. However, when scheduling and using TTIs of different lengths, the size of DCI is the same. For example, when scheduling PDSCH corresponding to regular TTI in the target carrier in DCI format 1A, the size of DCI is When scheduling a PDSCH corresponding to a short TTI in a target carrier in DCI format 1A with DCI format 1A, the DCI size is still 29 bits, where the length of the regular TTI is equal to the length of the target subframe. Equally, the length of the short TTI is less than the length of the target subframe.

  In the embodiment of the present invention, the TTI length of the PDSCH or PUSCH used for scheduling by the dedicated DCI located on the dedicated control channel is smaller than the length of the target subframe. Since the dedicated downlink control channel is not used for scheduling the PDSCH / PUSCH corresponding to the regular TTI, that is, the length of the PDTI or PUSCH TTI scheduled and used by the dedicated DCI is smaller than the length of the target subframe, Due to the TTI, it is possible to configure a dedicated DCI according to short TTI needs, thereby reducing control signaling overhead. For example, when the DCI format 1A transmitted to the USS of the PDCCH is used for scheduling a short TTI, the DCI format 1A has a length of 29 bits, but the DCI format 1A transmitted to the dedicated downlink control channel. May schedule the short TTI, the DCI format 1A may be less than or equal to 20 bits, or configure a new DCI format for the dedicated downlink control channel and schedule the short TTI in the new DCI format. May be used. For example, when the base station previously configures a part of the system bandwidth to support short TTI transmission, the base station sets the physical release allocation indication domain of the DCI to the defined part of the bandwidth. You may comprise based on width.

  In the embodiment of the present invention, since a terminal can transmit different data using different TTIs, a maximum number of processes of a hybrid automatic repeat request (abbreviated as “HARQ”) is changed. For example, in a Frequency Division Duplexing (abbreviated as "FDD") system, the maximum number of HARQ processes is still maintained at 8, but in the case of a TDD system, the HARQ maximum The number of processes will increase, for example, in the case of TDD uplink / downlink configuration 5, if the TTI is equal to 0.5 ms, the maximum number of HARQ processes will reach 22. Therefore, when the terminal transmits on different PDSCHs using at least two different TTIs, the HARQ process number may be individually set, that is, each terminal may be assigned its own number. For example, as shown in FIG. 2, in the FDD system, the TTI of the long process is 1 ms, the TTI of the short process is 0.5 ms, and the numbers of the long process and the short process are individual. Similarly, in the TDD system, the uplink / downlink configuration 2 of TDD is used as an example, and there are a long process and a short process in different subframes. Similarly, even if the TTI of the long process is 1 ms, Good, the short process TTI may be 0.5 ms, and the long process and short process numbers are separate.

  Specifically, the HARQ process number may be indicated by the HARQ process number information domain in DCI, and the length of the HARQ process number information domain may be determined by one of the following methods. .

  The length of the HARQ process number information domain may be directly set as 4 bits. Currently, the DCI in the TDD system uses 4 bits to indicate the HARQ process number, that is, a maximum of 16 processes can be set. The signaling may be indicated using the existing 4 bits, that is, limiting the number of HARQ processes in the actual scheduling so as not to exceed 16 yet.

  Also, based on the currently used at least two different TTI lengths of the terminal and the currently used TDD uplink / downlink configuration of the target carrier, the maximum number of currently supported HARQ processes of the terminal. And further determine the length of the corresponding HARQ process number information domain based on the actually supported maximum number of HARQ processes, eg, the system transmits on two different TTIs on different PDSCHs That is, 1 ms and 0.5 ms, currently using the uplink / downlink configuration 5 of TDD in the target carrier, where the maximum number of processes corresponding to 1 ms TTI is 15. , 0.5 ms TTI, the maximum number of processes is 22, In this case, the terminal determines the maximum number of HARQ processes actually currently supported as 22 and sets the length of the HARQ process number information domain used by the terminal as 5 bits.

  Also, the length of the HARQ process number information domain may be determined based on the maximum number of HARQ processes supported by the TDD system, and the TDD system may use different PDSCHs transmitted on the same carrier using at least two different TTIs. And / or supports different PUSCHs, for example, if the system supports up to 22 processes, any length of the HARQ process number information domain of the terminal performing data transmission using at least two different TTIs It may be set as 5 bits.

  The length of the HARQ process number information domain may be determined based on the maximum number of HARQ processes supported by the terminal.

  After using some of the above methods, the length of HARQ process number information domain in DCI scheduling different TTIs is the same.

  In an embodiment of the present invention, the UE may use the same transmission mode when transmitting on different PDSCHs and / or PUSCHs using different TTIs, and thus, the number of times of blind detection of the PDCCH does not increase. Guarantee. Different transmission modes may be used, and embodiments of the present invention are not limited thereto. However, when different transmission modes are used, when a short TTI is scheduled on the PDCCH and transmitted on the PDSCH, the DCI format is 1A (DCI format 1A), and the short TTI is scheduled on the PDCCH and transmitted on the PUSCH. In this case, the format of the DCI uses 0 (DCI format 0), where the short TTI is a TTI in which the length of the TTI is smaller than the length of the target subframe.

  In S130, data transmission is performed between the base station and the terminal using the determined TTI.

  Specifically, the terminal determines the TTI by detecting the PDCCH or the dedicated control channel of the target subframe, and then transmits the corresponding PDSCH or PUSCH based on the TTI. A plurality of subframes may be detected in a carrier, and a TTI corresponding to a PDSCH or a PUSCH transmitted in each subframe may be different, and the terminal may respond using at least two different TTIs in the target subframe. May be transmitted on the PDSCH and / or PUSCH.

  Therefore, in the method for data transmission according to an embodiment of the present invention, the terminal detects the PDCCH or the dedicated control channel of the subframe in the carrier to determine the TTI, and the length of the TTI is the length of the target subframe. May be more or less than the length, so that the terminal may transmit on different PDSCHs and / or different PUSCHs using at least two types of TTIs on the same carrier, ie, the terminal may transmit different TTIs By dynamically scheduling the data transmission to be used, release waste can be avoided.

  The method for data transmission according to the embodiment of the present invention has been described in detail with reference to FIGS. 1 and 2. Hereinafter, the method for data transmission according to the embodiment of the present invention will be described with reference to FIG. Will be described.

  As shown in FIG. 3, the terminal 200 for data transmission according to an embodiment of the present invention includes a determination unit 210, a detection unit 220, and a processing unit 230.

  The determination unit 210 may transmit based on configuration information transmitted by the base station using different physical downlink shared channels (PDSCHs) and / or different physical downlink shared channels (TTIs) using at least two different transmission time intervals (TTIs). It is configured to determine a physical uplink shared channel (PUSCH).

  The detecting unit 220 is configured to detect whether first downlink control information (DCI) is present on a physical downlink control channel (PDCCH) of a target subframe on the target carrier, and the first unit is configured to detect the first downlink control information (DCI). DCI is used to schedule a PDSCH to be transmitted in the target subframe on the target carrier.

  The processing unit 230 may determine that the terminal does not have the first DCI on the PDCCH of the target subframe, or that the first DCI exists on the PDCCH of the target subframe, and Is configured to detect a dedicated downlink control channel in the target downlink subframe if the length of the TTI of the PDSCH scheduled by the DCI is less than the length of the target subframe, wherein the dedicated control channel is And the TTI of the PDSCH or PUSCH scheduled by the dedicated DCI is smaller than the length of the target subframe.

  Then, the terminal for data transmission according to the embodiment of the present invention detects the PDCCH or the dedicated control channel of the subframe in the carrier to determine the TTI, and the length of the TTI is equal to the length of the target subframe. May or may not be greater than or equal to, so that the terminal can transmit on different PDSCHs and / or different PUSCHs using at least two types of TTIs on the same carrier, ie, the terminal uses different TTIs By dynamically scheduling data transmission to be performed, release waste can be avoided.

  Optionally, the processing unit may further comprise: the terminal determines that the first DCI is present on the PDCCH of the target subframe and that the transmission time interval (TTI) of the PDSCH scheduled by the first DCI is the target DCI. When detecting that the length is equal to or longer than the length of the subframe, the mobile station is further configured to receive a PDSCH scheduled by the first DCI.

  Optionally, the target subframe is a downlink subframe or a special subframe of a time division duplex (TDD) system.

  Optionally, the detection unit is specifically configured to detect whether the first DCI is present in a common search space (CSS) of the PDCCH of the target subframe, wherein the first DCI is present. The TTI length of the PDSCH scheduled by DCI is equal to the length of the target subframe, or equal to the length of the longest TTI of the at least two different TTIs, or of the at least two different TTIs. Equal to the length of the shortest TTI.

  Optionally, the detection unit is specifically configured to detect whether the first DCI is present in a terminal specific search space (USS) of the PDCCH of the target subframe, wherein the first DCI is present. DCI includes a specific information domain, and the specific information domain is used to indicate a TTI length of the PDSCH scheduled by the first DCI.

  Optionally, when the terminal transmits on a different PDSCH using the at least two different TTIs, a process number of a hybrid automatic repeat request (HARQ) of the different PDSCH is individually set.

  As an option, the HARQ process number may be indicated by a HARQ process number information domain in the first DCI, and a length of the HARQ process number information domain may be determined as 4 bits.

  Optionally, based on the length of the at least two different TTIs currently used by the terminal and the currently used TDD uplink / downlink configuration of the target carrier, the maximum currently supported by the terminal currently The number of HARQ processes may be determined, and the length of the HARQ process number information domain is determined based on the actually supported maximum number of HARQ processes.

  Optionally, the length of the HARQ process number information domain may be determined based on a maximum number of HARQ processes supported by the TDD system, wherein the TDD system uses at least two different TTIs on the same carrier. It supports transmitting on different PDSCHs and / or different PUSCHs.

  As an option, the length of the HARQ process number information domain may be determined based on the maximum number of HARQ processes supported by the terminal.

  Optionally, the transmission mode corresponding to the PDSCH transmitting in the at least two different TTIs is different and / or the transmission mode corresponding to the different PUSCH transmitting in the at least two different TTIs is different.

  Optionally, if the first DCI is present in the USS and the TTI length of the PDSCH scheduled by the first DCI is smaller than the length of the target subframe, the format of the first DCI is 1A.

  Optionally, the USS of the target subframe includes a second DCI, the second DCI is used for scheduling and using a PUSCH, and a TTI of a PUSCH scheduled by the second DCI is used. The length is smaller than the length of the target subframe, and the format of the second DCI is zero.

  It should be understood that the terminal 200 for data transmission according to an embodiment of the present invention may correspond to a terminal that performs the method 100 in the embodiment of the present invention, and that each unit in the terminal 200 The above operations and / or other operations and / or functions are for realizing a flow corresponding to the terminal of the method in FIG. 1 and are omitted here for the sake of brevity.

Therefore, the terminal for data transmission according to the embodiment of the present invention detects the PDCCH or the dedicated control channel of the subframe in the carrier to determine the TTI, and the length of the TTI is equal to the length of the target subframe. May or may not be greater than or equal to, so that the terminal can transmit on different PDSCHs and / or different PUSCHs using at least two types of TTIs on the same carrier, ie, the terminal uses different TTIs Can dynamically avoid scheduling the data transmission to avoid release waste Combining the steps of each exemplary unit and algorithm described in the embodiments disclosed herein; It can be implemented using electronic hardware or a combination of computer software and electronic hardware. Can be understood by those skilled in the art. Whether these functions are implemented in hardware or software form depends on the particular application of the technical proposal and the design constraints. Those skilled in the art will be able to implement the described functionality using different methods depending on each particular application, but such implementation should not be deemed to be beyond the scope of the present invention.

  For the convenience and brevity of the description, those skilled in the art can refer to the corresponding flows of the above-described method embodiments for specific operations of the systems, devices and units described above, where Omitted.

  In some embodiments provided herein, the disclosed systems, devices, and methods may be implemented in other manners. For example, the embodiments of the apparatus described above are merely illustrative, and for example, the division of the units is merely a logical division of functions, and in practice, other divisions may be used. For example, multiple units or components may be integrated or integrated into another system, or some technical features may be omitted or not implemented. Also, the mutual coupling, or direct coupling, or communication connection of each component explicitly or discussed is connected by the indirect coupling or communication of some interfaces, devices, or units. And may be electrical, mechanical, or other forms.

  The units described above as separate components may or may not be physically separate. Components shown as units may or may not be physical units. It may be located at one place or distributed to a plurality of network units. Depending on actual needs, some or all of the units may be selected to achieve the purpose of the technical solution of this embodiment.

  In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be a single unit, or two or more units may be integrated into one unit. You may.

  The functions may be implemented in the form of a software function unit, and when sold or used as an independent product, may be stored in a computer-readable storage medium. Accordingly, the technical solution of the present invention can be embodied in the form of a software product in which the technical solution of the present invention is substantially contributing to the prior art. Or the like) may include a plurality of instructions for executing all or a part of the method of each embodiment of the present invention. The above-mentioned storage medium stores various program codes such as a USB memory, a mobile storage medium, a read-only memory (ROM), a random access storage device (RAM), a magnetic disk or a compact disk. Includes available media.

  What has been described above is merely specific embodiments of the present invention, and the present invention is not limited thereto. Modifications or changes that can be easily conceived by those skilled in the art within the scope disclosed in the present invention. All permutations should be included within the scope of the present invention. Therefore, the scope of the present invention should be in accordance with the appended claims.

Claims (14)

A method for data transmission, comprising:
The terminal may transmit using different physical downlink shared channels (PDSCH) and / or transmit using at least two different transmission time intervals (TTIs) or transmission delays on the target carrier based on the configuration information transmitted by the base station. Determining different physical uplink shared channels (PUSCH);
The terminal detects a physical downlink control channel (PDCCH) in a target subframe on the target carrier;
The terminal may include a specific information domain in DCI on the PDCCH, a scrambling sequence used for a cyclic redundancy check (CRC) of the DCI, or a temporary identity (RNTI) of a radio network used for a CRC of the DCI. Determining a transmission delay or TTI used for transmission of the PDSCH and / or the PUSCH based on the data transmission. Different values of the specific information domain correspond to different transmission delays or TTIs, or the CRC indicates using different DCIs for different scrambling sequences, transmission delays or TTIs are different, or different CRCs use different DCIs for different RNTIs The transmission delay or TTI indicated by the
The method for data transmission according to claim 1. The terminal detects a physical downlink control channel (PDCCH) in a target subframe,
The terminal includes detecting the DCI in a terminal-specific search space (USS) of the PDCCH of the target subframe,
The DCI includes the specific information domain, and the specific information domain is used to indicate a TTI or a transmission delay length of a PDSCH scheduled by the DCI.
3. A method for data transmission according to claim 2. If the terminal transmits on a different PDSCH using the at least two different TTIs or transmission delays, a process number of a hybrid automatic repeat request (HARQ) of the different PDSCH is individually set. 4. A method for data transmission according to any one of the preceding claims. The HARQ process number is indicated by a HARQ process number information domain in the DCI,
Determination of the length of the HARQ process number information domain includes:
Determining the length of the HARQ process number information domain as 4 bits,
Or
A maximum currently supported by the terminal based on the currently used at least two different TTIs or transmission delay lengths of the terminal and a currently used TDD uplink / downlink configuration of the target carrier; Determining the number of HARQ processes, determining the length of the HARQ process number information domain based on the actually supported maximum number of HARQ processes,
Or
Determining the length of the HARQ process number information domain based on the maximum number of HARQ processes supported by the TDD system;
Or
Determining the length of the HARQ process number information domain based on the maximum number of HARQ processes supported by the terminal;
And the TDD system supports transmitting on different PDSCHs and / or different PUSCHs using at least two different TTIs or transmission delays on the same carrier,
The method for data transmission according to claim 4. Different transmission modes corresponding to different PDSCHs transmitted with the at least two different TTIs or transmission delays, and / or
The method for data transmission according to claim 1, wherein transmission modes corresponding to different PUSCHs transmitted with the at least two different TTIs or transmission delays are different. Different TTIs or transmission delays correspond to different service types,
A method for data transmission according to any one of the preceding claims. A terminal for data transmission,
Based on configuration information transmitted by the base station, different physical downlink shared channels (PDSCHs) and / or different physical uplinks that transmit using at least two different transmission time intervals (TTIs) or transmission delays on the target carrier. A determination unit configured to determine a link shared channel (PUSCH);
A detection unit configured to detect a physical downlink control channel (PDCCH) in a target subframe on the target carrier;
The determination unit may be a specific information domain in DCI on the PDCCH, or a scrambling sequence used for a cyclic redundancy check (CRC) of the DCI, or a temporary identity (RNTI) of a radio network used for a CRC of the DCI. Is further configured to determine a transmission delay or TTI used for transmission of the PDSCH and / or the PUSCH based on
A terminal for the data transmission; Different values of the specific information domain correspond to different transmission delays or TTIs, or the CRC indicates using different DCIs for different scrambling sequences, transmission delays or TTIs are different, or different CRCs use different DCIs for different RNTIs The transmission delay or TTI indicated by the
A terminal for data transmission according to claim 8. The detection unit is, specifically,
Configured to detect the DCI in a terminal specific search space (USS) of the PDCCH of the target subframe,
The DCI includes the specific information domain, and the specific information domain is used to indicate a TTI or a transmission delay length of a PDSCH scheduled by the DCI.
A terminal for data transmission according to claim 9. If the terminal transmits on a different PDSCH using the at least two different TTIs or transmission delays, a process number of a hybrid automatic repeat request (HARQ) of the different PDSCH is individually set. The terminal for data transmission according to any one of claims 10 to 10. The HARQ process number is indicated by a HARQ process number information domain in the DCI,
Determination of the length of the HARQ process number information domain includes:
Determining the length of the HARQ process number information domain as 4 bits,
Or
A maximum currently supported by the terminal based on the currently used at least two different TTIs or transmission delay lengths of the terminal and a currently used TDD uplink / downlink configuration of the target carrier; Determining the number of HARQ processes, determining the length of the HARQ process number information domain based on the actually supported maximum number of HARQ processes,
Or
Determining the length of the HARQ process number information domain based on the maximum number of HARQ processes supported by the TDD system;
Or
Determining the length of the HARQ process number information domain based on the maximum number of HARQ processes supported by the terminal;
And the TDD system supports transmitting on different PDSCHs and / or different PUSCHs using at least two different TTIs or transmission delays on the same carrier,
A terminal for data transmission according to claim 11. Different transmission modes corresponding to different PDSCHs transmitted with the at least two different TTIs or transmission delays, and / or
The terminal for data transmission according to any one of claims 8 to 12, wherein transmission modes corresponding to different PUSCHs transmitted with the at least two different TTIs or transmission delays are different. Different TTIs or transmission delays correspond to different service types,
A terminal for data transmission according to any one of claims 8 to 12.

Images