WO2018054147A1 - Procédé et système de détermination et d'indication d'un format d'informations de commande en liaison descendante - Google Patents

Procédé et système de détermination et d'indication d'un format d'informations de commande en liaison descendante Download PDF

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Publication number
WO2018054147A1
WO2018054147A1 PCT/CN2017/093034 CN2017093034W WO2018054147A1 WO 2018054147 A1 WO2018054147 A1 WO 2018054147A1 CN 2017093034 W CN2017093034 W CN 2017093034W WO 2018054147 A1 WO2018054147 A1 WO 2018054147A1
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dci
short tti
information
information field
legacy
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PCT/CN2017/093034
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English (en)
Chinese (zh)
Inventor
王磊
潘学明
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电信科学技术研究院
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Publication of WO2018054147A1 publication Critical patent/WO2018054147A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a method and apparatus for indicating and determining a format of a downlink control information.
  • the mobile Internet is subverting the traditional mobile communication business model, providing users with an unprecedented experience, which has a profound impact on all aspects of people's work and life.
  • the mobile Internet will promote the further upgrade of human social information interaction methods, providing users with a richer business experience such as augmented reality, virtual reality, ultra high definition (3D) video, mobile cloud and so on.
  • the further development of the mobile Internet will bring about a thousand times increase in mobile traffic in the future, and promote a new round of changes in mobile communication technologies and industries.
  • the Internet of Things has expanded the range of services for mobile communications, from human-to-human communication to the intelligent interconnection of people and things, things and things, making mobile communication technology penetrate into a wider range of industries and fields.
  • TTI Transmission Time Interval
  • FIG. 1 is a schematic diagram of a frame structure 1 used by an LTE FDD system.
  • the existing Long Term Evolution (LTE) Frequency Division Duplex (FDD) system uses a frame structure (frame structure type 1, FS1), and its structure. As shown in Figure 1.
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • the uplink and downlink transmissions use different carrier frequencies, and both the uplink and downlink transmissions use the same frame structure.
  • a 10ms-length radio frame contains 10 1ms subframes, each of which is divided into two 0.5ms long slots.
  • the TTI duration of uplink and downlink data transmission is 1 ms.
  • FIG. 2 is a schematic diagram of a frame structure 2 used in an LTE TDD system.
  • the existing LTE TDD (Time Division Duplex) system uses a frame structure type 2 (FS2), as shown in FIG. 2 .
  • FS2 frame structure type 2
  • uplink and downlink transmissions use different subframes or different time slots on the same frequency.
  • Each 10 ms radio frame in FS2 consists of two 5 ms half frames, each of which contains five subframes of 1 ms length.
  • the sub-frames in FS2 are classified into three types: downlink sub-frames, uplink sub-frames, and special sub-frames.
  • Each special sub-frame consists of Downlink Pilot Time Slot (DwPTS), Guard Period (GP), and Uplink Pilot Time Slot (UpPTS) is composed of three parts.
  • the DwPTS can transmit downlink pilot, downlink service data and downlink control signaling; the GP does not transmit any signal; the UpPTS only transmits random access and Sounding Reference Symbol (SRS), and cannot transmit uplink service or uplink control information.
  • Each field includes at least one downlink subframe and at least one uplink subframe, and at most one special subframe. Table 7 lists the seven uplink and downlink subframe configurations supported by FS2.
  • Figure 3 is a schematic diagram of a Downlink resource grid.
  • the minimum resource granularity in the time domain is an OFDM (Orthogonal Frequency Division Multiplex) symbol.
  • the upper minimum resource granularity is one subcarrier.
  • (k, l) is the number of a basic RE (resource element).
  • PRB (physical resource block) is a resource unit of a larger dimension. RE composition.
  • the PRB pair is the basic unit of data resource allocation.
  • DCI downlink control information
  • PDCCH physical downlink control channel
  • DCI format0/4 is used for uplink data scheduling
  • DCI format1/1A/1B/1C/1D/2/2A/2B/2C is used for downlink data scheduling
  • DCI for each format is for different transmission modes/uses, including
  • the number of information bits is different, and the meaning of the information field is also different.
  • the DCI contains most of the information required to schedule User Equipment (UE), such as resource allocation and modulation. Modulation and Coding Scheme (MCS), HARQ ID (HARQ ID; HARQ: Hybrid Automatic Repeat Request), New Data Indicator (NDI), and the like.
  • MCS Modulation and Coding Scheme
  • HARQ ID HARQ ID
  • NDI New Data Indicator
  • the terminal distinguishes different DCI formats according to different DCI sizes. For different DCI formats with the same DCI size, the display bit in the DCI is used to indicate which DCI format the DCI is.
  • the shortcoming of the prior art is that in some cases, the terminal cannot distinguish the DCI format according to the display bit indication in the DCI.
  • the present application provides a method and apparatus for indicating and determining a DCI format, which can distinguish between a traditional DCI format and a short TTI DCI format when control information of a short TTI is transmitted in a legacy control region.
  • a method for indicating a DCI format is provided in the embodiment of the present application, including:
  • Carrying an indication in an information field of a DCI of a legacy subframe and a DCI of a short TTI where the indication is used to indicate that the DCI is a DCI of a legacy subframe or a DCI of a short TTI; or, using a different RNTI value for a legacy subframe
  • the DCI is scrambled with the DCI of the short TTI.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the information field carrying the indication is located in a DCI of the short TTI and a specific information field of the information bit in the DCI format 0/1 A.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the indication is not carried in the information field.
  • the CRC of the DCI of the legacy subframe and the CRC of the DCI of the short TTI are scrambled using different RNTIs.
  • a method for determining a DCI format including:
  • the DCI After receiving the DCI, determining, according to the indication, that the DCI is a DCI of a legacy subframe or a DCI of a short TTI, where the information field of the DCI carries an indication, where the indication is used to indicate that the DCI is a legacy subframe.
  • the DCI is a DCI of a legacy subframe or a DCI of a short TTI;
  • the length of the DCI information bit of the short TTI is the same as the length of the DCI information bit of the legacy subframe.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the information field carrying the indication is located in a DCI of the short TTI and a specific information field of the information bit in the DCI format 0/1 A.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the DCI format is not determined according to the indication.
  • the DCI is classified into a DCI of a legacy subframe or a DCI of a short TTI according to a CRC scrambled by using different RNTIs.
  • An apparatus for indicating a DCI format including:
  • a determining module configured to determine that a DCI information bit length of the short TTI is the same as a DCI information bit length of the legacy subframe
  • An indication module configured to carry an indication in an information field of a DCI of a legacy subframe and a DCI of a short TTI, where the indication is used to indicate that the DCI is a DCI of a legacy subframe or a DCI of a short TTI; or, use different RNTI values
  • the DCI of the legacy subframe and the DCI of the short TTI are scrambled.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the indication module is further configured to carry the indication in a specific information domain of the information bit in the DCI of the short TTI and the DCI format 0/1 A.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the indication module is further configured to: when the DCI of the short TTI is not transmitted in the control area of the legacy, and/or when the DCI of the short TTI is transmitted in the control area of the short TTI, the indication is not carried in the information domain.
  • the indication module is further configured to scramble the CRC of the DCI of the legacy subframe and the DCI of the short TTI by using different RNTIs.
  • An apparatus for determining a DCI format including:
  • a receiving module configured to receive a DCI
  • a distinguishing module configured to determine, according to the indication, that the DCI is a DCI of a legacy subframe or a DCI of a short TTI, where the information field of the DCI carries an indication, where the indication is used to indicate the DCI a DCI of a legacy subframe or a DCI of a short TTI; or, after receiving the DCI, determining, according to different RNTI, the DCI is a DCI of a legacy subframe or a DCI of a short TTI;
  • the length of the DCI information bit of the short TTI is the same as the length of the DCI information bit of the legacy subframe.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the information field carrying the indication is located in a DCI of the short TTI and a specific information field of the information bit in the DCI format 0/1 A.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the distinguishing module is further configured to: when the DCI of the short TTI is not transmitted in the control area of the legacy, and/or when the DCI of the short TTI is transmitted in the control area of the short TTI, the DCI format is not determined according to the indication.
  • the distinguishing module is further configured to distinguish the DCI according to the CRC scrambled by using different RNTIs after receiving the DCI.
  • An apparatus for indicating a DCI format including:
  • a processor for reading a program in the memory performing the following process:
  • the indication is carried in the information field of the DCI of the legacy subframe and the DCI of the short TTI, where the indication is used to indicate that the DCI is legacy
  • the DCI of the frame or the DCI of the short TTI; or, the DCI of the legacy subframe and the DCI of the short TTI are scrambled using different RNTI values.
  • a transceiver for receiving and transmitting data under the control of a processor.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the processor is further configured to carry the indication in a specific information domain of the information bit in the DCI of the short TTI and the DCI format 0/1 A.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the processor is further configured to: when the DCI of the short TTI is not transmitted in the control area of the legacy, and/or when the DCI of the short TTI is transmitted in the control area of the short TTI, do not carry the indication in the information domain.
  • the processor is further configured to scramble the CRC of the DCI of the legacy subframe and the DCI of the short TTI by using different RNTIs.
  • An apparatus for determining a DCI format including:
  • a processor for reading a program in the memory performing the following process:
  • the DCI After receiving the DCI, determining, according to the indication, that the DCI is a DCI of a legacy subframe or a DCI of a short TTI, where the information field of the DCI carries an indication, where the indication is used to indicate that the DCI is a legacy subframe.
  • the DCI is a DCI of a legacy subframe or a DCI of a short TTI;
  • the length of the DCI information bit of the short TTI is the same as the length of the DCI information bit of the legacy subframe.
  • a transceiver for receiving and transmitting data under the control of a processor.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the information field carrying the indication is located in a DCI of the short TTI and a specific information field of the information bit in the DCI format 0/1 A.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the processor is further configured to: when the DCI of the short TTI is not transmitted in the control area of the legacy, and/or when the DCI of the short TTI is transmitted in the control area of the short TTI, the DCI format is not determined according to the indication.
  • the processor is further configured to: after receiving the DCI, distinguish the DCI from the DCI of the legacy subframe or the DCI of the short TTI according to the CRC scrambled by using different RNTIs.
  • the DCI or the short TTI indicating that the DCI is a legacy subframe is carried in the information domain.
  • the indication enables the terminal to distinguish the DCI of the legacy subframe of the same size and the DCI of the short TTI according to the indication.
  • the network side uses different RNTI (Radio Network Temporary Identifier) values to scramble the DCI of the legacy subframe and the DCI of the short TTI, so that the terminal side can also be based on different RNTIs. It is determined that the DCI is a DCI of a legacy subframe or a DCI of a short TTI.
  • RNTI Radio Network Temporary Identifier
  • the technical solution provided by the embodiment of the present application can also help reduce the number of blind detections of the terminal when the short DCI is transmitted in the legacy control region, because the DCI of the legacy subframe of the same size and the DCI of the short TTI can be distinguished.
  • FIG. 1 is a schematic diagram of a frame structure 1 used by an LTE FDD system in the background art
  • FIG. 2 is a schematic diagram of a frame structure 2 used by the LTE TDD system in the background art
  • FIG. 3 is a schematic diagram of a Downlink resource grid in the background art
  • FIG. 4 is a schematic flowchart of a method for implementing a method for indicating a DCI format on a network side according to an embodiment of the present application
  • FIG. 5 is a schematic flowchart of a method for determining a DCI format on a terminal side according to an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of an apparatus for indicating a DCI format on a network side according to an embodiment of the present application
  • FIG. 7 is a schematic structural diagram of an apparatus for determining a DCI format on a terminal side according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a terminal in an embodiment of the present application.
  • a TTI length shorter than 1 ms can bring about an increase in throughput and a decrease in transmission time, and has become a hot spot of current research.
  • DCI formats In the existing LTE system, different DCI formats generally have different sizes, so the terminal can use the bit length to distinguish different DCI formats, thereby determining the resolution of each information domain in the DCI.
  • DCI format0/1A since the bit lengths of the two are the same, it is necessary to distinguish them by using Flag for format0/format1A differentiation (differential flag of format 0/1A).
  • Flag for format0/format1A differentiation Differential flag of format 0/1A
  • the terminal cannot determine whether the DCI is a legacy subframe DCI or a short TTI DCI, which may be erroneous.
  • the information field in the DCI is parsed, resulting in failure to receive or transmit data correctly.
  • FIG. 4 is a schematic flowchart of a method for implementing a method for indicating a DCI format on a network side, as shown in the figure, which may include:
  • Step 401 Determine that the length of the DCI information bit of the short TTI is the same as the length of the DCI information bit of the legacy subframe.
  • Step 402 Carry an indication in an information domain of a DCI of a legacy subframe and a DCI of a short TTI, where the indication is used for Indicates that the DCI is a DCI of a legacy subframe or a DCI of a short TTI; or, the DCI of the legacy subframe and the DCI of the short TTI are scrambled using different RNTI values.
  • FIG. 5 is a schematic flowchart of a method for determining a DCI format on a terminal side.
  • the following may include:
  • Step 501 Receive a DCI.
  • Step 502 After receiving the DCI, determine, according to the indication, that the DCI is a legacy subframe DCI or a short TTI DCI, where the information field of the DCI carries an indication, where the indication is used to indicate that the DCI is legacy The DCI of the frame DCI or the short TTI; or, after receiving the DCI, determines whether the DCI is a DCI of a legacy subframe or a DCI of a short TTI according to different RNTIs.
  • the specific information field in the DCI may be used to add a DCI type indication field at a specific position of the DCI information bit, to indicate that the DCI is a DCI of a legacy subframe or a DCI of a short TTI.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in a UE-specific search space (USS) in a legacy control region.
  • USS UE-specific search space
  • the DCI of the legacy legacy subframe and the DCI of the short TTI are simultaneously transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the information field carrying the indication is located in a DCI of a short TTI and a specific information field of an information bit in DCI format0/10/1.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the DCI type indication domain may be located in a specific information domain of the information bit in the DCI.
  • the specific information field refers to the first information field in which all information bits of the DCI start from the lower bit. For example, all the information bits in the DCI are from low to high, a0, a1, ..., aN, and the first information field is represented by a0. Bit information;
  • the specific information field refers to a second information field in which all information bits of the DCI start from a lower bit.
  • all information bits in the DCI are a0, a1, ..., aN from a low to a high bit, assuming a0, a1, a3 are first information.
  • the bit information of the domain, and the second information domain is the bit information represented by a4;
  • the specific information field may be other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the DCI type indication field includes 1 bit information, and may be expressed as follows:
  • 0 or 1 indicates that the DCI is a DCI of a legacy subframe, and the terminal parses the information field in the DCI according to the DCI of the legacy subframe;
  • the terminal parses the information field in the DCI according to the DCI of the short TTI;
  • the network side may further include:
  • the indication is not carried in the information field.
  • the terminal side may further include:
  • the DCI format is not determined according to the indication.
  • the DCI type indication domain may not appear:
  • the DCI type indication field may not exist in the DCI of the legacy subframe
  • the DCI type indication field may not exist in the DCI of the short TTI.
  • the Cyclic Redundancy Check (CRC) of the DCI of the legacy subframe and the CRC of the DCI of the short TTI are scrambled using different RNTIs.
  • the terminal distinguishes the DCI from the DCI of the legacy subframe or the DCI of the short TTI according to the CRC scrambled by using different RNTIs.
  • the short TTI is represented as sTTI in the embodiment, and the DCI transmitted on the sTTI, that is, the DCI of the short TTI is represented as sDCI; the DCI of the legacy subframe is represented as the DCI of the legacy subframe;
  • the DCI of the short TTI and the DCI of the scheduled short TTI data are one meaning, and the DCI of the legacy subframe and the DCI of the scheduled legacy subframe data are a meaning.
  • the same representations in other parts of the application also represent the same meaning.
  • sDCI scheduling the DCI transmitted by the terminal on the sTTI.
  • the sDCI is transmitted in a legacy control region. It is also assumed that the DCI of the legacy subframe that the UE is scheduled to transmit on the normal subframe is DCI format1A.
  • the size of the sDCI is the same as the size of DCI format0/1A. Assume sDCI and The bit length of DCI format0/10/1 is M bit.
  • the terminal blindly checks the DCI according to the M bit in its own search space. Since the size of sDCI and DCI format0/1A are the same, the terminal can receive sDCI and DCI format1A through a set of blind detection. .
  • the terminal After receiving the sDCI or DCI format1A, the terminal determines, according to the bit information of the first information field, that the current DCI is sDCI or DCI format1A. For example, if the 1-bit information of the first information field is 0, it is determined that the current DCI is DCI format1A, and then each information field in the DCI is parsed according to the DCI format 1A; if the 1-bit information of the first information field is 1, the current information is determined. The DCI is sDCI, and then each information field in the DCI is parsed in the manner of sDCI.
  • Table 2 DCI format1A and sDCI format information fields
  • sDCI scheduling the DCI transmitted by the terminal on the sTTI.
  • the sDCI is transmitted in a legacy control region. It is also assumed that the DCI of the legacy subframe transmitted by the UE on the normal subframe is DCI format1A.
  • the size of the sDCI is the same as the size of DCI format0/1A.
  • the terminal blindly checks the DCI according to the M bit in its own search space. Since the size of sDCI and DCI format1A are the same, the terminal can receive sDCI and DCI format1A through a set of blind detection.
  • the terminal After receiving the sDCI or DCI format1A, the terminal determines, according to the bit information of the second information field, that the current DCI is sDCI or DCI format1A. For example, if the 1-bit information of the second information field is 0, it is determined that the current DCI is DCI format1A, and then each information field in the DCI is parsed according to the DCI format 1A; if the 1-bit information of the second information field is 1, the current information is determined. The DCI is sDCI, and then each information field in the DCI is parsed in the manner of sDCI.
  • sDCI scheduling the DCI transmitted by the terminal on the sTTI.
  • the sDCI is transmitted in a legacy control region. It is also assumed that the DCI of the legacy subframe transmitted by the UE on the normal subframe is DCI format0.
  • the size of the sDCI is the same as the size of DCI format0/1A.
  • the bit length of sDCI and DCI format0/1A is M bit, and the terminal blindly checks the DCI according to the M bit in its own search space. Since the size of sDCI and DCI format0/1A are the same, the terminal can receive sDCI through a blind test. And DCI format0.
  • the terminal After receiving the sDCI or DCI format0, the terminal determines, according to the bit information of the second information field, that the current DCI is sDCI or DCI format0/1A. For example, if the 1-bit information of the second information field is 0, it is determined that the current DCI is DCI format0/1A, and then the current DCI is determined to be DCI format0 according to Flag for format0/1A, and then each DCI is parsed according to DCI format0.
  • the information field if the 1-bit information of the second information field is 1, it determines that the current DCI is sDCI, and then parses each information field in the DCI according to the sDCI manner.
  • Table 4 DCI format0 and sDCI format information fields
  • the DCI type indication field in the embodiment 1-3 may be placed at other specific locations in the DCI information bit, and details are not described herein again.
  • the sDCI that schedules the terminal is transmitted in the control region of the short TTI. Since only the sDCI is transmitted in the control region of the short TTI, it is not confused with the DCI of the legacy subframe. Therefore, the DCI type indication field does not exist in the sDCI transmitted in the control region of the short TTI, and the terminal does not follow the sDCI after receiving the sDCI. There is a hypothesis of the DCI type indication field to resolve each information field in the sDCI.
  • the control information of the sTTI cannot be transmitted in the legacy control region through the network or the DCI, and the DCI type indication field does not exist in the DCI of the scheduled normal subframe data transmission transmitted by the legacy control region, and the base station does not
  • the DCI type indicates the domain to send the DCI, and the terminal parses each information domain in the DCI in a manner that does not have a DCI type indication field.
  • sDCI scheduling the DCI transmitted by the terminal on the sTTI.
  • the sDCI is transmitted in a legacy control region. It is also assumed that the DCI of the legacy subframe that the UE is scheduled to transmit on the normal subframe is DCI format1A.
  • the size of the sDCI is the same as the size of DCI format0/1A.
  • the bit length of sDCI and DCI format0/1A is M bit, and the terminal blindly checks the DCI according to the M bit in its own search space. Since the size of sDCI and DCI format0/1A are the same, the terminal can receive sDCI through a blind test. And DCI format1A.
  • the base station side uses RNTI1 to scramble the CRC; for the DCI of the sTTI, the base station side uses RNTI2 to scramble the CRC.
  • the correspondence between the RNTI and the CRC is also known to the terminal side.
  • the terminal After receiving the DCI, the terminal checks the DCI according to a CRC scrambled with different RNTI values. If the terminal successfully verifies the DCI according to the CRC of the RNTI1 scrambling, the DCI is determined to be the DCI of the legacy subframe, and the information domain is parsed according to the DCI format1A format. If the terminal successfully verifies the DCI according to the CRC of the RNTI2 scrambling, the DCI is determined to be the DCI of the sTTI, and the information domain is parsed according to the sDCI format.
  • an apparatus for indicating and determining a DCI format is also provided in the embodiment of the present application. Since the principle of solving the problem is similar to the method of indicating and determining the DCI format, the implementation of these devices may refer to the method. The implementation, repetitions will not be repeated.
  • FIG. 6 is a schematic structural diagram of an apparatus for indicating a DCI format on a network side, as shown in the figure, which may include:
  • a determining module 601 configured to determine that a DCI information bit length of the short TTI is the same as a DCI information bit length of the legacy subframe;
  • the indication module 602 is configured to carry an indication in the information domain of the DCI of the legacy subframe and the DCI of the short TTI, where the indication is used to indicate that the DCI is a DCI of a legacy subframe or a DCI of a short TTI; or, use a different RNTI The value scrambles the DCI of the legacy subframe and the DCI of the short TTI.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the indication module is further configured to carry the indication in a specific information field of the information bit in the DCI of the short TTI and the DCI format 0/1 A.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the indication module is further configured to: when the DCI of the short TTI is not transmitted in the legacy control region, and/or when the DCI of the short TTI is transmitted in the control region of the short TTI, do not carry the indication in the information domain.
  • the indication module is further configured to use the different RNTI to scramble the CRC of the legacy subframe and the CRC of the short TTI.
  • FIG. 7 is a schematic structural diagram of a device for determining a DCI format on a terminal side, as shown in the figure, which may include:
  • the receiving module 701 is configured to receive a DCI.
  • the distinguishing module 702 is configured to determine, according to the indication, that the DCI is a DCI of a legacy subframe or a DCI of a short TTI, where the information field of the DCI carries an indication, where the indication is used to indicate the DCI.
  • the DCI is the DCI of the legacy subframe or the DCI of the short TTI; or, after receiving the DCI, determining, according to different RNTI, the DCI is the DCI of the legacy subframe or the DCI of the short TTI;
  • the length of the DCI information bit of the short TTI is the same as the length of the DCI information bit of the legacy subframe.
  • the DCI of the legacy subframe and the DCI of the short TTI are USS in the legacy control region. Transmitted in.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the information field carrying the indication is located in a DCI of a short TTI and a specific information field of an information bit in DCI format0/10/1.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • the distinguishing module is further configured to: when the DCI of the short TTI is not transmitted in the legacy control region, and/or when the DCI of the short TTI is transmitted in the control region of the short TTI, the DCI format is not determined according to the indication.
  • the distinguishing module is further configured to: after receiving the DCI, distinguish the DCI from the DCI of the legacy subframe or the DCI of the short TTI according to the CRC scrambled by using different RNTIs.
  • FIG. 8 is a schematic structural diagram of a base station, as shown in the figure, the base station includes:
  • the processor 800 is configured to read a program in the memory 820 and perform the following process:
  • the transceiver 810 is configured to receive and transmit data under the control of the processor 800, and performs the following processes:
  • Carrying an indication in an information field of a DCI of a legacy subframe and a DCI of a short TTI where the indication is used to indicate that the DCI is a DCI of a legacy subframe or a DCI of a short TTI; or, using a different RNTI value for a legacy subframe
  • the DCI is scrambled with the DCI of the short TTI.
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the information field carrying the indication is located in a DCI of a short TTI and a specific information field of an information bit in DCI format0/10/1.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific information bits of the DCI except the first information domain and the second information domain. position.
  • the information field carrying the indication includes 1 bit information.
  • it further includes:
  • the indication is not carried in the information field.
  • the CRC of the legacy CIC of the legacy subframe and the DCI of the short TTI are scrambled using different RNTIs.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 800 and various circuits of memory represented by memory 820.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 810 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 in performing operations.
  • FIG. 9 is a schematic structural diagram of a terminal. As shown in the figure, the terminal includes:
  • the processor 900 is configured to read a program in the memory 920 and perform the following process:
  • the DCI After receiving the DCI, determining, according to the indication, that the DCI is a DCI of a legacy subframe or a DCI of a short TTI, where the information field of the DCI carries an indication, where the indication is used to indicate that the DCI is a legacy subframe.
  • the DCI is a DCI of a legacy subframe or a DCI of a short TTI;
  • the length of the DCI information bit of the short TTI is the same as the length of the DCI information bit of the legacy subframe.
  • the transceiver 910 is configured to receive and transmit data under the control of the processor 900, and performs the following processes:
  • the DCI of the legacy subframe and the DCI of the short TTI are transmitted in the USS in the legacy control region.
  • the length of the DCI of the short TTI is the same as the DCI format0/1A of the legacy subframe.
  • the information field carrying the indication is located in a DCI of a short TTI and a specific information field of an information bit in DCI format0/10/1.
  • the specific information field is a first information field in which all information bits of the DCI start from a low position
  • the specific information field is a second information field in which all information bits of the DCI start from a low position
  • the specific information field is other specific locations of all information bits of the DCI except the first information domain and the second information domain.
  • the information field carrying the indication includes 1 bit information.
  • it further includes:
  • the DCI format is not determined according to the indication.
  • the DCI is classified into the DCI of the legacy subframe or the DCI of the short TTI according to the CRC scrambled by using different RNTIs.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 900 and various circuits of memory represented by memory 920.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 910 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 930 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 900 in performing operations.
  • the DCI type indication field is added to the DCI and the sDCI of the legacy subframe. It is used to determine the DCI or sDCI of the legacy subframe.
  • the technical solution provided by the embodiment of the present application can be used to distinguish the DCI and the sDCI of the legacy subframes of the same size, and help reduce the number of blind detections of the terminal when the sDCI is transmitted in the legacy control region.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de détermination et d'indication d'un format d'informations de commande en liaison descendante. Le procédé comprend les étapes suivantes : lorsque la longueur de bits d'informations d'informations de commande de liaison descendante pour un intervalle de temps de transmission court est la même que celle d'informations de commande de liaison descendante d'une sous-trame existante, un domaine d'informations transportant une indication selon laquelle les informations de commande de liaison descendante sont les informations de commande de liaison descendante de la sous-trame existante ou les informations de commande de liaison descendante pour l'intervalle de temps de transmission court ; après réception des informations de commande de liaison descendante, déterminer, selon l'indication, que les informations de commande de liaison descendante sont les informations de commande de liaison descendante de la sous-trame existante ou les informations de commande de liaison descendante pour l'intervalle de temps de transmission court. La présente invention permet à un terminal de distinguer des informations de commande de liaison descendante de même taille d'une sous-trame existante et des informations de commande de liaison descendante pour un intervalle de temps de transmission court et d'aider à réduire le nombre d'essais aveugles du terminal lorsque des informations de commande de liaison descendante courtes sont transmises dans une région de commande existante.
PCT/CN2017/093034 2016-09-26 2017-07-14 Procédé et système de détermination et d'indication d'un format d'informations de commande en liaison descendante WO2018054147A1 (fr)

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CN110391867B (zh) * 2018-04-16 2022-06-21 维沃移动通信有限公司 Dci检测方法、dci发送方法、终端和基站
WO2020133457A1 (fr) * 2018-12-29 2020-07-02 Oppo广东移动通信有限公司 Procédé de communication sans fil, dispositif réseau et dispositif terminal
CN111404654B (zh) * 2019-01-02 2021-07-23 大唐移动通信设备有限公司 一种dci的解析方法、通知方法、终端和网络侧设备
CN111262672B (zh) 2019-03-14 2021-11-02 维沃移动通信有限公司 传输方法、网络设备和终端
WO2021092841A1 (fr) * 2019-11-14 2021-05-20 北京小米移动软件有限公司 Procédé et appareil de transmission d'informations de commande de liaison descendante, dispositif de communication et support de stockage

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