WO2018082025A1 - 物理下行控制信道的传输方法、终端设备和基站 - Google Patents

物理下行控制信道的传输方法、终端设备和基站 Download PDF

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Publication number
WO2018082025A1
WO2018082025A1 PCT/CN2016/104662 CN2016104662W WO2018082025A1 WO 2018082025 A1 WO2018082025 A1 WO 2018082025A1 CN 2016104662 W CN2016104662 W CN 2016104662W WO 2018082025 A1 WO2018082025 A1 WO 2018082025A1
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Prior art keywords
information
terminal device
message
pdcch
base station
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PCT/CN2016/104662
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English (en)
French (fr)
Inventor
刘哲
张兴炜
黎超
时洁
孙迎花
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华为技术有限公司
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Priority to PCT/CN2016/104662 priority Critical patent/WO2018082025A1/zh
Priority to CN201680090133.XA priority patent/CN109863798A/zh
Publication of WO2018082025A1 publication Critical patent/WO2018082025A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, a terminal device, and a base station for transmitting a physical downlink control channel.
  • a downlink control channel with different aggregation levels is used to support different Downlink Control Information (DCI) formats to improve resource utilization.
  • DCI Downlink Control Information
  • PDCCH Physical Downlink Control Channel
  • the downlink control channel (Physical Downlink Control Channel, PDCCH) has four formats ⁇ 0, 1, 2, 3 ⁇ corresponding to aggregation levels ⁇ 1, 2, 4, 8 ⁇ , respectively, where the aggregation level indicates a PDCCH occupancy continuity.
  • the CPDCCH is transmitted using one CCE; if the PDCCH is transmitted to a UE with a poor downlink channel quality, the CCE with a high aggregation level is used. For example, 8 CCEs transmit PDCCH to improve more robust coding and reliability by increasing the aggregation level.
  • the number of PDCCH symbols is indicated by a Physical Control Format Indicator Channel (PCFICH) channel, and the PCFICH is used to notify the terminal device of the size of the control region corresponding to the downlink control frame, that is, the control region.
  • the number of OFDM symbols, or PCFICH is used to indicate the number of OFDM symbols used to transmit the PDCCH in one downlink subframe.
  • the PCFICH is sent in every scheduled Transmission Time Interval (TTI) and can be dynamically changed. In other words, the number of PDCCH symbols can be changed during the transmission of the downlink control channel.
  • TTI Transmission Time Interval
  • UE is at Each TTI needs to recalculate different situations corresponding to the number of OFDM symbols occupied by the control region.
  • both uplink and downlink are transmitted in a system frame structure, and each system frame is 10 ms.
  • LTE supports two frame structures: frame structure type 1 for Frequency Division Duplex (FDD) and frame structure type 2 for Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the subframe length is 1 ms
  • each subframe includes two consecutive slots
  • the slot number in one system frame is 0-19.
  • the uplink and downlink transmissions are separated by frequency domain.
  • Within each 10ms there are 10 subframes available for uplink and downlink transmission.
  • Each transmission time interval TTI is 1 ms, which is equal to the length of the subframe.
  • the uplink is introduced, and the short TTI (Short TTI) can be called “transmission duration”, and has been in the 72nd meeting of the 3GPP Radio Access Network (RAN). It is agreed that the downlink short TTI may be 2 OFDM symbols or 7 OFDM symbols, and the uplink short TTI may be 2 OFDM symbols, 4 OFDM symbols or 7 OFDM symbols, wherein the OFDM symbol may be abbreviated as “OS”.
  • downlink short TTI structures exist in the prior art, but there is no research on how to configure the downlink short TTI and how to notify the terminal device.
  • the present invention studies the downlink short TTI structure configured by the base station and the manner of notifying the terminal device. .
  • the embodiment of the present invention provides a method for transmitting a physical downlink control channel, a terminal device, and a base station, and configuring transmission mode information of a transmission duration according to the number of PDCCH symbols, that is, a downlink short TTI structure, and implementing a downlink short TTI structure without spanning time slots (The slot boundary is consistent with the uplink structure, which improves the flexibility and applicability of the downlink scheduling.
  • an embodiment of the present invention provides a method for transmitting a physical downlink control channel, where the method may include:
  • the terminal device receives the first message from the base station, where the first message may be the indication information of the transmission mode information in the transmission duration information, for example, the indication information of the transmission mode information is an identifier of the transmission mode information, or the second physical downlink control channel PDCCH The number of symbols, where the second PDCCH is an existing physical downlink control channel.
  • the terminal device determines at least one of the transmission mode information and the transmission duration type according to the first message.
  • the terminal device determines resource information of the first downlink control information DCI according to at least one of the transmission mode information and the transmission duration type.
  • the transmission mode information is determined according to the identifier of the transmission mode information, that is, the downlink transmission duration structure, and the resource information of the first downlink control information DCI is determined, so as to receive the resource information according to the first DCI.
  • a DCI is the transmission mode information, that is, the downlink transmission duration structure, and the resource information of the first downlink control information DCI is determined, so as to receive the resource information according to the first DCI.
  • the first message is the number of symbols of the PDCCH, determining a downlink transmission duration structure according to the number of symbols of the PDCCH, and determining resource information of the first downlink control information DCI, so as to receive the first DCI according to the resource information of the first DCI.
  • the transmission mode information and/or the transmission duration type may be collectively referred to as transmission duration information.
  • the first DCI is the downlink physical control channel PDCCH, that is, the downlink control information carried on the sPDCCH in the short TTI, and may be referred to as sDCI.
  • the first physical downlink control channel PDCCH is a physical downlink control channel corresponding to a short TTI.
  • the base station configures the transmission duration information, and sends indication information of the transmission duration information to the terminal device, so that the terminal device determines to receive the resource information of the first DCI, and according to the first
  • the resource information of the DCI receives the first DCI, and implements flexible configuration of different transmission mode information, that is, a downlink sTTI structure.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • the first message may include:
  • the terminal device determines the transmission mode information according to the identifier of the transmission mode information.
  • the first message may include a symbol number of the second physical downlink control channel PDCCH; the number of symbols of the second PDCCH may be a physical control format channel of the base station Sent by PCFICH.
  • the terminal device determines transmission duration information according to the number of symbols of the second PDCCH, where the transmission duration information may include at least one of transmission mode information and transmission duration type.
  • Different transmission method information that is, a downlink transmission duration structure, is flexibly configured for different number of symbols of the second PDCCH.
  • the method further includes:
  • the terminal device receives the second message from the base station, where the second message includes the first indication information of the resource information of the first DCI.
  • the resource information of the first downlink control information DCI is determined according to at least one of the transmission mode information and the transmission duration type ,include:
  • the resource information of the first DCI is determined according to at least one of the transmission mode information, the transmission duration type, and the second message.
  • the second message further includes resource information of the first physical downlink control channel PDCCH The second indication.
  • the second indication information is used to indicate the first transmission of the terminal device after the second physical downlink control channel PDCCH
  • the OFDM symbol occupied by the duration receives the first PDCCH on the OFDM symbol except the OFDM symbol occupied by the second PDCCH; or is used to instruct the terminal device to receive the first PDCCH on the initial OFDM symbol of each transmission duration Or, for indicating that the terminal device receives the first PDCCH on a common OFDM symbol of the transmission mode information.
  • the first indication information is used to indicate that the terminal device is The first DCI is received on the resource information of the second PDCCH; or the terminal device is instructed to receive the first DCI on the resource information of the first PDCCH.
  • the indication information of the resource information for transmitting the second downlink control channel PDCCH on the downlink transmission duration structure and the indication information of the resource information for transmitting the first downlink control information DCI are provided. That is, the resource information of the terminal device receiving the second downlink control channel PDCCH is configured on the downlink transmission duration structure, and the resource information of the terminal device receiving the first DCI is configured.
  • the second message is further Third indication information including the number of symbols of the first PDCCH.
  • the solution provided by the embodiment of the present invention provides a method for indicating the number of symbols of the first PDCCH compared to the prior art.
  • the third indication information is used to indicate that the terminal device receives the number of symbols of the first PDCCH on a short physical control format indicator channel (sPCFICH).
  • the sPCFICH is a physical control format indicator channel in the short TTI, and the role of the PCFICH in the prior art is the same.
  • the number of symbols occupied by the first PDCCH needs to be carried on the sPCFICH of each short TTI.
  • the number of symbols of the first PDCCH is a fixed number of symbols.
  • the solution provided by the embodiment of the present invention saves resources by using the number of symbols of the first PDCCH as a fixed number of symbols. At the same time, the number of symbols of the first PDCCH is flexibly indicated by signaling, that is, the second message.
  • the third indication information is used to indicate that the terminal device is in the first The number of symbols of the first PDCCH is received on the resource information of the second PDCCH; or And indicating, by the terminal device, the number of symbols of the first PDCCH received on the resource information of the first PDCCH.
  • the method in combination with the third possible implementation of the first aspect to any of the possible implementations of the tenth possible implementation of the first aspect, in an eleventh possible implementation manner of the first aspect, the method also includes:
  • the terminal device receives a third message from the base station, where the third message is used to indicate that the number of symbols of the first PDCCH is reconfigured.
  • the solution provided by the embodiment of the present invention flexibly configures the number of symbols of the first PDCCH by using signaling, that is, the third message.
  • the message further includes fourth indication information of the first downlink control information DCI level.
  • the solution provided by the embodiment of the present invention provides a first DCI level indication method relative to the prior art.
  • the fourth indication information is used to indicate that the terminal device receives the first DCI on the resource information of the second PDCCH.
  • Level information For the base station, the first DCI level information is a level for transmitting the first DCI, for example, the first DCI sent is a first-level DCI, or two-level DCI. Level 1 DCI, which can be sent on each transmission time.
  • the two-stage DCI first transmits the DCI information of the subframe level, and the carried information can be used by the terminal equipment included in the subframe, and the second PDCCH needs to send the DCI information once for each transmission duration for each transmission duration. Scheduling; the information carried is the proprietary information of each terminal device for each transmission duration.
  • the method further includes:
  • the terminal device receives the fourth message from the base station, where the fourth message is used to indicate that the terminal device receives the level of the first downlink control information DCI, and the third message includes the fifth indication information of the first downlink control information DCI level.
  • the third message or the fourth message includes At least one of physical layer signaling or high layer signaling may be RRC signaling, SIB signaling, or downlink control information.
  • an embodiment of the present invention provides a method for transmitting a physical downlink control channel, where the method includes:
  • the base station sends a first message to the terminal device, where the first message is used to indicate at least one of the transmission mode information and the transmission duration type.
  • the method for transmitting a physical downlink control channel according to the embodiment of the present invention by transmitting a first message to a terminal device, indicating at least one of a transmission mode information and a transmission duration type, is convenient for the terminal device according to the transmission mode information and the transmission duration type.
  • At least one resource information determining the first downlink control information DCI, and receiving the first DCI on the determined resource information.
  • the base station can flexibly configure different transmission method information, that is, a downlink transmission duration structure, by using the first message.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure.
  • the flexibility and applicability of downlink scheduling is improved.
  • the first message includes an identifier of the transmission mode information, and the identifier of the transmission mode information is used to indicate the transmission mode information.
  • the first message includes
  • the number of symbols of the second physical downlink control channel PDCCH, and the number of symbols of the second PDCCH is used to indicate transmission mode information.
  • the method also includes:
  • the base station sends a second message to the terminal device, where the second message includes first indication information of the resource information of the first downlink control information DCI.
  • the transmission duration information includes at least one of a transmission duration type or transmission mode information.
  • the second message further includes a first physical downlink control channel Second indication information of resource information of the PDCCH.
  • the second indication information includes: first, after indicating that the terminal device is after the second physical downlink control channel PDCCH The OFDM symbol occupied by the transmission duration receives the first PDCCH on the OFDM symbol except the OFDM symbol occupied by the second PDCCH; or is used to indicate that the terminal device receives the first on the initial OFDM symbol of each transmission duration PDCCH; or, for indicating that the terminal device receives the first PDCCH on a common OFDM symbol of the transmission mode information.
  • the first indication information is used to indicate that the terminal device is in the first
  • the first DCI is received on the resource information of the second PDCCH; or is used to instruct the terminal device to receive the first DCI on the resource information of the first PDCCH.
  • the method for transmitting the physical downlink control channel provided by the present invention is configured to send the resource information of the first PDCCH and the resource information of the first DCI on the downlink transmission duration structure, and notify the terminal device by using the indication method, so as to facilitate the terminal device. Receive the first DCI.
  • the second message The third indication information of the number of symbols of the first PDCCH is further included.
  • the solution provided by the embodiment of the present invention provides a method for indicating the number of symbols of the first PDCCH compared to the prior art.
  • the method further includes:
  • the base station determines the number of symbols of the first PDCCH according to the bandwidth allocated for the terminal device included in each subframe.
  • the method further includes:
  • the base station determines the number of symbols of the first PDCCH according to the information of the first downlink control information DCI level.
  • the number of symbols of the first PDCCH is a fixed number of symbols.
  • the solution provided by the embodiment of the present invention saves resources by using the number of symbols of the first PDCCH as a fixed number of symbols. At the same time, the number of symbols of the first PDCCH is flexibly indicated by signaling, that is, the second message.
  • the third indication information is used to indicate that the terminal device receives the number of symbols of the first PDCCH on the resource information of the second PDCCH, or is used to indicate that the terminal device receives the number of symbols of the first PDCCH on the resource information of the first PDCCH.
  • the third indication information is used to indicate that the terminal device receives the number of symbols of the first PDCCH on the short physical control format indication channel sPCFICH.
  • the sPCFICH is a physical control format indicator channel in the short TTI, and has the same function as the PCFICH in the prior art.
  • the symbol number information of the first PDCCH needs to be carried on the sPCFICH of each short TTI.
  • the method also includes:
  • the base station sends a third message to the terminal device, where the third message is used to indicate reconfiguration of the first PDCCH.
  • the solution provided by the embodiment of the present invention flexibly configures the number of symbols of the first PDCCH by using signaling, that is, the third message.
  • the message further includes fourth indication information of the first downlink control information DCI level.
  • the solution provided by the embodiment of the present invention provides a first DCI level indication method relative to the prior art.
  • the method further includes:
  • the base station determines information of the first DCI level.
  • the base station determines the information of the first DCI level, including:
  • the base station determines information of the first DCI level according to the transmission mode.
  • the base station determines the information of the first DCI level, including:
  • the base station determines, according to resource information of the transmission duration, information of the first DCI level
  • the resource information of the transmission duration includes time-frequency resource information of a pre-configured transmission duration.
  • the fourth indication information is used to indicate that the terminal device receives the information of the first DCI level on the resource information of the second PDCCH.
  • the method further includes:
  • the base station sends a fourth message to the terminal device, where the fourth message is used to indicate that the terminal device receives the level of the first downlink control information DCI, and the fourth message includes the first downlink control information DCI level. Five instructions.
  • the third message or the fourth message includes At least one of physical layer signaling or higher layer signaling.
  • an embodiment of the present invention provides a terminal device, where the terminal device includes:
  • a receiving unit configured to receive a first message from a base station
  • a processing unit configured to determine at least one of a transmission mode information and a transmission duration type according to the first message
  • the processing unit is configured to determine resource information of the first downlink control information DCI according to at least one of the transmission mode information and the transmission duration type.
  • At least one of different transmission mode information and transmission duration type that is, a downlink sTTI structure, is flexibly configured.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • the first message may include an identification of the transmission mode information.
  • the processing unit determines the transmission mode information according to the identifier of the transmission mode information.
  • the receiving unit is further configured to receive a second message from the base station, where the second message includes first indication information of the resource information of the first DCI.
  • the processing unit determines, according to at least one of the transmission mode information and the transmission duration type, the first downlink control information DCI.
  • Resource information including:
  • the processing unit determines the resource information of the first DCI according to at least one of the transmission mode information, the transmission duration type, and the second message.
  • the second message further includes the first physical downlink control channel Second indication information of resource information of the PDCCH.
  • the first indication information is used to indicate that the terminal device receives the resource information of the second physical downlink control channel PDCCH. a DCI; or the first indication is used to instruct the terminal device to receive the first DCI on the resource information of the first PDCCH.
  • the terminal device provided by the embodiment of the present invention may further implement the sixth possible implementation manner of the first aspect, which is not described herein for brevity.
  • the base station sends the resource information of the first PDCCH and the resource information of the first DCI, and improves the downlink scheduling. Flexibility and applicability.
  • the second The message further includes the third indication information of the number of symbols of the first PDCCH, and the specific indication method of the indication method of the number of symbols of the first PDCCH is given in the prior art, which can be referred to the eighth possible implementation manner of the first aspect to A possible implementation manner of the eleventh possible implementation manner of the first aspect may also implement the eighth possible implementation manner of the first aspect to the eleventh possible implementation manner of the first aspect. For the sake of brevity, the repetitions are not repeated here.
  • the receiving unit And the third message is used to receive the third message from the base station, where the third message is used to indicate the number of symbols of the first PDCCH, and the number of symbols of the first PDCCH can be flexibly configured by using the third message.
  • the terminal device provided by the embodiment of the present invention can also implement the twelfth possible implementation manner of the first aspect to the fifteenth possible implementation manner of the first aspect, and can achieve the phase The same technical effect, for the sake of brevity, will not be repeated here.
  • an embodiment of the present invention provides a base station, where the base station includes:
  • a sending unit configured to send a first message to the terminal device, where the first message is used to indicate at least one of a transmission mode information and a transmission duration type.
  • the base station can flexibly configure different transmission method information, that is, a downlink transmission duration structure, by using the first message.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure.
  • the flexibility and applicability of downlink scheduling is improved.
  • the sending unit sends the identifier of the transmission mode information to the terminal device, where the identifier of the transmission mode information is used to indicate the transmission mode information.
  • the sending unit is further configured to send a second message to the terminal device, where the second message is used to indicate the first The first indication information of the resource information of the row control information DCI.
  • the second message further includes second indication information of the resource information of the first physical downlink control channel PDCCH.
  • the base station can also implement the fifth possible implementation manner of the second aspect, which is not described herein for brevity.
  • the first indication information is used to indicate that the terminal device receives the resource information of the second physical downlink control channel PDCCH.
  • a DCI; or the first indication information is used to indicate that the terminal device receives the first DCI on the resource information of the first PDCCH.
  • the base station sends the resource information of the first PDCCH and the resource information of the first DCI, which improves the flexibility and applicability of the downlink scheduling.
  • the second message further includes the number of symbols of the first PDCCH The third indication.
  • the base station further includes:
  • a processing unit configured to determine, according to a bandwidth allocated for the terminal device included in each subframe, a symbol number of the first PDCCH.
  • the base station further includes:
  • a processing unit configured to determine, according to the first downlink control information DCI level information, a number of symbols of the first PDCCH.
  • the base station provided by the embodiment of the present invention further has the functions of implementing the eleventh possible implementation manner of the second aspect and the twelfth possible implementation manner of the second aspect, and achieving the same technical effect, which is simple Description, no longer repeat here.
  • the sending unit is further configured to send the The third message is used to indicate the number of symbols for reconfiguring the first PDCCH.
  • the method for indicating the number of symbols of the first PDCCH is compared with the prior art.
  • the third message is used to indicate the number of symbols of the first PDCCH, and the flexible configuration of the number of symbols of the first PDCCH is implemented.
  • the base station provided by the embodiment of the present invention may also implement the thirteenth possible implementation manner of the second aspect to the twentieth possible implementation manner of the second aspect, and may achieve the same technical effect for a brief description. , will not repeat them here.
  • an embodiment of the present invention provides a terminal device, where the terminal device includes: a receiver and a processor.
  • a receiver configured to receive the first message from the base station.
  • a processor configured to determine at least one of the transmission mode information and the transmission duration information according to the first message.
  • the processor is further configured to determine resource information of the first DCI according to at least one of the transmission mode information and the transmission duration information.
  • a flexible configuration of at least one of different transmission mode information and transmission duration types, that is, a downlink sTTI structure is implemented.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • the first message may include an identifier of the transmission mode information.
  • the processor determines the transmission mode information according to the identifier of the transmission mode information.
  • the receiver is further configured to receive a second message from the base station, where the second message includes first indication information of the resource information of the first DCI.
  • the processor determines, according to at least one of the transmission mode information and the transmission duration type, the first downlink control information DCI.
  • Resource information including:
  • the processor determines the resource information of the first DCI according to at least one of the transmission mode information, the transmission duration type, and the second message.
  • the second message further includes a first physical downlink Second indication information of resource information of the control channel PDCCH.
  • the second indication information may implement the sixth possible implementation manner of the first aspect and the indication function of the seventh possible implementation manner of the first aspect, and the second indication information implemented by the third aspect Indicates the function and can achieve the same technical effect. For the sake of brevity, it will not be described here.
  • the second message may further include third indication information of the number of symbols of the first PDCCH.
  • the method for indicating the number of symbols of the first PDCCH is given in the prior art.
  • the specific indication method can be referred to the eighth possible implementation manner of the first aspect to the eleventh possible implementation manner of the first aspect.
  • the technical effect of the eleventh possible implementation manner of the first aspect to the eleventh possible implementation manner of the first aspect may be implemented in any manner that may be implemented. For the sake of brevity, the repeated description is not repeated herein.
  • the second message may further include fourth indication information of the first downlink control information DCI level.
  • a flexible configuration of the first PDCCH is implemented.
  • the terminal device provided by the embodiment of the present invention can also implement the twelfth possible implementation manner of the first aspect to the fifteenth possible implementation manner of the first aspect, and can achieve the same technical effect, and is simple. Description, no longer repeat here.
  • an embodiment of the present invention provides a base station, where the base station includes:
  • the transmitter 510 is configured to send the first message to the terminal device.
  • the first message is used to indicate at least one of a transmission mode information and a transmission duration type.
  • the base station can flexibly configure different transmission method information, that is, a downlink transmission duration structure, by using the first message.
  • a downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure.
  • the flexibility and applicability of downlink scheduling is improved.
  • the transmitter sends the identifier of the transmission mode information to the terminal device, where the identifier of the transmission mode information is used to indicate the transmission mode information.
  • the transmitter is further configured to send a second message to the terminal device, where the second message is used to indicate the first The first indication information of the resource information of the row control information DCI.
  • the second message further includes second indication information of resource information of the first physical downlink control channel PDCCH.
  • the second indication information has an indication function that implements a sixth possible implementation manner of the second aspect and a seventh possible implementation manner of the second aspect, and the second indication information is implemented in the third aspect.
  • the indication function and the same technical effect can be achieved. For the sake of brevity, it will not be described here.
  • the first indication information has a mode indicating function that implements the eighth possible implementation of the second aspect, and the same technical effect can be achieved.
  • the details are not described herein again.
  • the second message further includes third indication information of the number of symbols of the first PDCCH, and implements flexible configuration of the number of symbols of the first PDCCH.
  • the base station further includes a processor, and the processor further has functions for implementing the ninth to eleventh possible implementation manners of the second aspect. For brevity, the details are not described herein.
  • the embodiment of the present invention further provides a method for indicating a DCI level of the first downlink physical control channel.
  • the first message further includes fourth indication information of the first downlink control information DCI level.
  • the base station can also implement the fifteenth possible implementation manner of the second aspect to the twentieth possible implementation manner, and can achieve the same technical effect.
  • the base station can also implement the fifteenth possible implementation manner of the second aspect to the twentieth possible implementation manner, and can achieve the same technical effect.
  • the method for transmitting the physical downlink control channel, the terminal device, and the base station provided by the embodiment of the present invention the base station sends the first message to the terminal device, and uses the transmission method of the physical downlink control channel provided by the embodiment of the present invention, and the base station configures the transmission duration information. And sending a first message to the terminal device, instructing the user to determine to receive the resource information of the first downlink control information DCI, so that the terminal device determines the connection
  • the resource information of the first DCI is received, and the first DCI is received according to the resource information of the first DCI, so that different transmission mode information, that is, a downlink sTTI structure, is flexibly configured.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • FIG. 1 is a schematic structural diagram of an FDD frame in the prior art
  • FIG. 2 is a schematic structural diagram of a system according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for transmitting a physical downlink control channel according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a downlink transmission duration structure and a sPDCCH resource information when a symbol number of the PDCCH is 1 according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a downlink transmission duration structure and a sPDCCH resource information when another symbol of the PDCCH is 2 according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a downlink transmission duration structure and a sPDCCH resource information transmission when the number of symbols of the PDCCH is 3 according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of another method for transmitting a physical downlink control channel according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of still another method for transmitting a physical downlink control channel according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of another base station according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of another terminal device according to an embodiment of the present invention.
  • the downlink transmission duration not only the downlink transmission duration but also the length of the short TTI can be configured as 2 OFDM symbols or 7 OFDM symbols.
  • the downlink control channel PDCCH still exists, and the number of symbols in the subframe other than the number of symbols occupied by the PDCCH is used.
  • Short TTI business Since the number of symbols occupied by the PDCCH is 1, 2, and 3, the structure of the downlink short TTI is affected. Therefore, the technical solution of the present invention has been proposed.
  • a short TTI (short TTI) is simply referred to as sTTI, or is called a transmission duration.
  • the physical downlink control channel of the sTTI is the first physical downlink control channel PDCCH, abbreviated as sPDCCH, and the downlink control information is the first downlink control information, abbreviated as sDCI.
  • the traditional physical downlink control channel is the second physical downlink control channel PDCCH, which is abbreviated as PDCCH, and the conventional downlink control information is abbreviated as DCI.
  • the number of symbols of the PDCCH mentioned is the number of occupied symbols of the PDCCH.
  • the embodiment of the present invention provides a method for transmitting a physical downlink control channel, a terminal device, and a base station.
  • the embodiment of the present invention can be applied to a cellular network link with a base station, or a system, as shown in FIG.
  • the system may include one or more terminal devices, an Evolved Node B (eNodeB).
  • eNodeB Evolved Node B
  • the terminal equipment may be referred to as a terminal, or may be a user equipment (UE), a mobile station (MS), and a mobile terminal.
  • UE user equipment
  • MS mobile station
  • the terminal device can communicate with one or more core networks via a radio access network (RAN), for example, the terminal device can be a mobile phone (or "cellular" phone) or have a mobile
  • RAN radio access network
  • the terminal device can be a mobile phone (or "cellular" phone) or have a mobile
  • the terminal's computer or the like, for example, the terminal device can also be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.
  • the base station needs to configure the downlink sTTI structure according to the different number of symbols of the PDCCH, or configure different transmission duration information for different symbol numbers of the PDCCH.
  • the transmission duration information may include at least one of a transmission duration sTTI type or a transmission duration information (sTTI transmission pattern).
  • the sTTI type is that each transmission duration sTTI is several OFDM symbols, for example, sTTI is 2 OFDM symbols, sTTI is 4 OFDM symbols, or sTTI is 7 OFDM symbols, and so on.
  • the transmission mode information is the sTTI structure in the downlink sTTI structure, and the number of OFDM symbols per sTTI in the downlink sTTI structure. For example, in the downlink sTTI structure, sTTI0 is 3 OFDM symbols, sTTI1 is 2 OFDM symbols, and sTTI is 2 The OFDM symbol, sTTI4 is 2 OFDM symbols, sTTI5 is 2 OFDM symbols, and sTTI6 is 3 OFDM symbols, and the transmission mode information is 322223.
  • the base station further needs to configure the resource information of the physical downlink control channel sPDCCH and the downlink data information sDCI according to the downlink sTTI structure configured according to the different symbol numbers of the PDCCH.
  • FIG. 3 is a flowchart of a method for transmitting a physical downlink control channel according to an embodiment of the present invention. As shown in FIG. 3, the method 100 can include:
  • the base station sends a first message to the terminal device.
  • the first message is used to instruct the terminal device to determine at least one of the transmission mode information and the transmission duration type, so that the terminal device determines the resource information of the first downlink control information DCI according to at least one of the transmission mode information and the transmission duration type.
  • the first downlink control information DCI is the downlink control information carried by the PDCCH in the sTTI, that is, the downlink control information carried by the sPDCCH, which is simply referred to as sDCI.
  • the base station sends the identifier of the transmission mode information to the terminal device, so that the terminal device determines the resource information of the first DCI according to the identifier of the transmission mode information.
  • the transmission mode information is one of transmission duration information, or the transmission duration information includes transmission mode information.
  • the transmission duration information may include at least one of a transmission type or a transmission mode information.
  • the transmission duration type is a length of the transmission duration sTTI, for example, the transmission duration sTTI is 2 OFDM symbols, 4 OFDM symbols, or 7 OFDM symbols.
  • the transmission mode information is the length of each transmission duration sTTI in the sTTI structure, for example, the transmission mode information of the transmission duration in one subframe is 322, 223, ..., indicating that sTTI0 is 3 OFDM symbols, sTTI1 is 2 OFDM symbols, sTTI2 It is 2 OFDM symbols, sTTI3 is 2 OFDM symbols, sTTI4 is 2 OFDM symbols, and sTTI5 is 3 OFDM symbols, ....
  • the mapping between the transmission mode information and the identifier is pre-configured or predefined in the base station and the terminal device, so that the terminal device receives the identifier of the transmission duration sent by the base station, according to the transmission mode.
  • the identifier identifies the downlink sTTI structure, that is, the transmission mode information used by the base station to send downlink control information to the terminal device.
  • the first message sent by the base station to the terminal device may further include:
  • the base station transmits the number of symbols of the second physical downlink control channel PDCCH to the terminal device by using a physical control format indicator channel (PCFICH).
  • PCFICH physical control format indicator channel
  • the second physical downlink control channel PDCCH is an existing PDCCH defined in the sTTI, that is, a legacy PDCCH.
  • the mapping between the number of symbols of the PDCCH and the downlink sTTI structure needs to be pre-configured or predefined for the terminal device, so that when the terminal device receives the number of symbols of the PDCCH sent by the base station, the downlink device may determine the downlink according to the number of symbols of the PDCCH. sTTI structure.
  • the first message sent by the base station to the terminal device may also be the transmission duration information.
  • the base station further needs to send the second message to the terminal device, where the second message may include the first indication information of the resource information of the first DCI.
  • the resource information may include a time domain location, a frequency domain location, or a time-frequency domain location.
  • the terminal device when the terminal device receives the transmission duration information sent by the base station, the downlink sTTI structure is determined according to the sTTI type or the transmission mode information in the transmission duration information, and the resource information of the first DCI is sent according to the received base station.
  • the indication information determines the resource information of the first DCI.
  • the terminal device determines at least one of a transmission mode information and a transmission duration type according to the first message.
  • the terminal device determines the transmission mode information according to the identifier of the transmission mode, that is, the downlink sTTI.
  • the terminal device determines at least one of the transmission mode information and the transmission duration type according to the number of symbols of the PDCCH.
  • the terminal device determines resource information of the first downlink control information DCI according to at least one of a transmission mode information and a transmission duration type.
  • the terminal device determines resource information for receiving the sDCI according to at least one of the transmission mode information and the transmission duration type, so that the terminal device receives the sDCI on the determined resource information.
  • the mapping relationship between the transmission mode information, the transmission duration type, and the sDCI resource information needs to be pre-configured or predefined for the terminal device, so that the terminal device can be configured according to the transmission mode information. At least one of the transmission duration types determines resource information of the sDCI.
  • the base station configures the transmission duration information, and sends a first message including the identifier of the transmission mode information or the symbol number of the PDCCH to the terminal device, so that the terminal device can use the first message according to the first message.
  • the transmission mode information and the transmission duration type are determined, and the resource information of the first DCI is further determined according to at least one of the transmission mode information and the transmission duration type, and the first DCI is received according to the resource information of the first DCI. It realizes flexible configuration of different transmission mode information, that is, the downlink sTTI structure.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • the first message includes an identifier of the transmission mode information
  • the terminal device determines the transmission mode information according to the identifier of the transmission mode information.
  • the base station determines the information according to the channel quality and the like.
  • the aggregation level used by the PDCCH correspondingly determining the PDCCH The number of symbols.
  • the base station determines the transmission mode information used for transmitting the downlink control data according to the number of symbols of the PDCCH.
  • each transmission duration sTTI is 2 OFDM symbols
  • each transmission duration sTTI is 4 OFDM symbols or each transmission duration sTTI is 7 OFDM symbols, and so on;
  • the transmission duration type in the transmission duration information determined by the base station may also be a non-fixed transmission duration sTTI, for example, sTTI0 is 3 OFDM symbols, sTTI1 is 2 OFDM symbols, and sTTI2 is 2 OFDM symbols. ,and many more.
  • the base station determines the transmission mode information, for example, the transmission mode information is: 322, 223, ..., indicating that sTTI0 is 3 OFDM symbols, and sTTI1 is 2 OFDM The symbol, sTTI2 is 2 OFDM symbols, sTTI3 is 2 OFDM symbols, sTTI4 is 2 OFDM symbols, and sTTI5 is 3 OFDM symbols, ....
  • the base station configures a downlink sTTI structure, such as a transmission duration sTTI type and transmission duration information, according to different symbol numbers of the PDCCH.
  • a downlink sTTI structure such as a transmission duration sTTI type and transmission duration information
  • the transmission duration sTTI can be 2 OFDM symbols; when the number of symbols of the PDCCH is 2 or 3, the sTTI can be configured as 7 OFDM symbols, and so on.
  • the eNB may configure the sTTI type to be a fixed transmission duration sTTI, for example, each transmission duration sTTI is 2 OFDM symbols, or each transmission duration sTTI is 7 OFDM symbols, and the like;
  • the base station may also configure the sTTI type to a plurality of possible transmission durations, for example, the number of OFDM symbols occupied by each transmission duration sTTI is different. If the base station configures the sTTI type for a plurality of possible transmission durations, the base station also needs to configure transmission mode information of the transmission duration.
  • the base station further configures the resource information of the physical downlink control channel sPDCCH and the resource information of the downlink data information sDCI for the configured downlink sTTI structure, for example, as shown in FIG. 3 to FIG. 5 .
  • the resource information may include a time domain location, a frequency domain location, or a time-frequency domain location.
  • 5 to FIG. 7 are two OFDM symbols according to the downlink sTTI type, and the symbol numbers of the PDCCH are 1, 2, and 3, respectively, and the downlink sTTI structure configured for the base station, and the corresponding resource information of the sPDCCH and the resource information of the sDCI. Be explained.
  • FIG. 5 is a schematic diagram of a downlink sTTI structure and transmission of sPDCCH resource information when the number of symbols of the PDCCH is 1.
  • the base station may be configured to transmit sDCI on the PDCCH region of the sTTI0, that is, the OFDM symbol occupied by the PDCCH, and transmit a Physical Downlink Shared Channel (PDSCH) on the remaining OFDM symbols of the sTTI.
  • the PDSCH is a physical downlink control channel in the sTTI and may be referred to as sPDSCH.
  • the transmission mode information of the downlink sTTI structure configured by the base station is 322, 223, that is, sTTI0 is 3 OFDM symbols, sTTI1 is 2 OFDM symbols, sTTI2 is 2 OFDM symbols, and sTTI3 is 2 OFDM symbols. sTTI4 is 2 OFDM symbols, and sTTI5 is 3 OFDM symbols.
  • the base station may configure to transmit sPDCCH on the first OFDM symbol except PDCCH occupied symbol in sTTI0, and send sPDCCH or sPDSCH on the remaining OFDM symbols of sTTI0.
  • the first OFDM symbol of sTTI0 is the PDCCH
  • the sPDCCH is transmitted in the second OFDM symbol of sTTI0
  • the sPDCCH or sPDSCH is transmitted in the third OFDM symbol.
  • the sDCI may be transmitted on the OFDM symbol occupied by the PDCCH, or the sDCI may be transmitted on the OFDM symbol occupied by the sPDCCH.
  • the sDCI can be sent in the time-frequency domain location where the PDCCH is located or the sDCI can be sent in the time-frequency domain location where the sPDCCH is located.
  • the downlink control information carried by the sPDCCH may include a first-level DCI, and may be sent on each sTTI.
  • the downlink control information carried by the sPDCCH may also include a slow DCI or a fast DCI in the two-stage DCI, and the two-level DCI needs to be sent once on each sTTI for scheduling of each sTTI; the bearer information is for each sTTI.
  • the downlink control information that is sent by the sPDCCH may also include the downlink control information sent by the subframe level in the two-level DCI or the downlink control information sent by each sTTI.
  • the downlink sTTI structure transmission mode information configured by the base station is 322, 322, that is, sTTI0 is 3 OFDM symbols, sTTI1 is 2 OFDM symbols, sTTI2 is 2 OFDM symbols, and sTTI3 is 3 OFDM symbols. sTTI4 is 2 OFDM symbols, and sTTI5 is 2 OFDM symbols.
  • FIG. 6 is a schematic diagram of a downlink sTTI structure and transmission of sPDCCH resource information when the number of symbols of the PDCCH is 2.
  • the base station may be configured to transmit sPDSCH at sTTI0, and the scheduling information of sDCI and sTTI0 may be transmitted in the time-frequency domain position of the PDCCH.
  • the base station may configure the first OFDM symbol transmission sPDCCH in sTTI0, and the sPDCCH or sPDSCH in the second OFDM symbol of sTTI0.
  • the sDCI may be transmitted in the time-frequency domain location where the PDCCH is located or the sDCI may be transmitted in the time-frequency domain location where the sPDCCH is located.
  • the downlink control information carried by the sPDCCH may include a first-level DCI, that is, an sDCI transmitted at each sTTI; and/or a two-stage sDCI:slow DCI and a fast DCI of data scheduling sTTI0.
  • the downlink sTTI structure transmission mode information configured by the base station is 223, 223, that is, sTTI0 is 2 OFDM symbols, sTTI1 is 2 OFDM symbols, sTTI2 is 3 OFDM symbols, and sTTI3 is 2 OFDM symbols. sTTI4 is 2 OFDM symbols, and sTTI5 is 3 OFDM symbols.
  • FIG. 7 is a schematic diagram of a downlink sTTI structure and transmission of sPDCCH resource information when the number of symbols of the PDCCH is 3.
  • the configuration of the base station shown in FIG. 7(a) is similar to the configuration of the base station in FIG. 5(a), and the configuration of the base station shown in FIG. 7(b) is similar to the configuration of the base station in FIG. 5(b). I will not repeat them here.
  • the downlink sTTI structure transmission mode information configured by the base station is 322, 223, that is, sTTI0 is 3 OFDM symbols, sTTI1 is 2 OFDM symbols, and sTTI2 is 2 OFDM symbols.
  • the downlink sTTI structure and the sPDCCH resource information configured by the base station in FIG. 5 to FIG. 7 are only a method for configuring the downlink sTTI structure and the sPDCCH resource information, and the base station is not configured with the downlink sTTI structure and the sPDCCH resource information.
  • the base station may also configure other downlink sTTI structures and send sPDCCH resource information, and the specific form of the configuration is not limited in the embodiment of the present invention.
  • the base station may further configure the OFDM symbol according to the sTTI.
  • the downlink sTTI structure and the sPDCCH resource information and the sDCI resource information are not limited in the embodiment of the present invention.
  • the transmission method of the physical downlink control channel implements flexible configuration of different downlink sTTI structures according to the number of symbols of different PDCCHs.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure when the sTTI is 2 OFDM symbols or 7 OFDM symbols; and improves the flexibility and applicability of the downlink scheduling.
  • FIG. 4 is a flowchart of a method for transmitting a physical downlink control channel according to an embodiment of the present invention. As shown in FIG. 4, the method 100 can include:
  • the base station sends a second message to the terminal device, where the second message includes first indication information of the resource information of the first downlink control information DCI.
  • the first downlink control information DCI is downlink control information transmitted in the downlink sTTI, and may be referred to as sDCI.
  • the first indication information is used to indicate a time domain location, a frequency domain location, or a time-frequency domain location of the sDCI.
  • the terminal device determines, according to at least one of the transmission mode information and the transmission duration type, and the second message, the resource information of the first DCI.
  • the frequency domain location is such that the terminal device receives the sDCI at the time domain and/or frequency domain location where the sDCI is transmitted.
  • the terminal device determines at least one of the transmission mode information and the transmission duration type according to the first message, that is, the S120 and the terminal receive the second message from the base station, that is, the S140 is in no particular order, and may be
  • the actual implementation of the logic is not limited in the embodiment of the present invention.
  • the base station configures the transmission duration information according to the PDCCH symbol number, and sends the indication information of the transmission duration information to the terminal device and the resource information including the first downlink control information DCI. a second message indicating the first information, so that the terminal device determines, according to the transmission duration information and the second message, the resource information of the first DCI, and receives the first DCI according to the resource information of the first DCI, and implements flexible configuration.
  • Downstream sTTI structure At the same time, the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • the base station may configure the transmission duration information according to different symbol numbers of the PDCCH, and may configure information such as the transmission duration type or the transmission mode information.
  • the transmission duration information sent by the base station to the terminal device may include a transmission duration type or transmission duration information.
  • the transmission duration information sent by the base station to the terminal device needs to include the transmission duration type and the transmission mode information.
  • the second message may further include indication information of resource information of the first physical downlink control channel PDCCH.
  • the first physical downlink control channel PDCCH is an sPDCCH.
  • the second indication information is used to indicate that the terminal device sends the time domain location, the frequency domain location, or the time-frequency domain location of the sPDCCH.
  • the second indication information may include: indicating that the second physical downlink control channel PDCCH Transmitting the first PDCCH on the OFDM symbol other than the OFDM symbol occupied by the second PDCCH in the OFDM symbol occupied by the first transmission duration; or indicating that the transmission is performed on the initial OFDM symbol of each transmission duration A PDCCH.
  • the sPDCCH is transmitted only on the remaining OFDM symbols including the first sTTI of the PDCCH, and as shown in FIG. 5(b), the sPDCCH is transmitted on the second OFDM symbol including the sTTI0 of the PDCCH, which needs to be explained. It is also possible to transmit the sPDCCH on the 3rd OFDM symbol of sTTI0. In the remaining sTTIs, the sPDCCH may be transmitted on the first OFDM symbol.
  • the common OFDM symbol is as shown in FIG. 5(a) and FIG. 5(b), the transmission duration sTTI4 occupies the 4th OFDM symbol of the second slot, and the 4th OFDM symbol of the second slot A common OFDM symbol for transmission mode information.
  • the first indication information may be used to indicate that the terminal device receives the first DCI on the resource information of the second physical downlink control channel PDCCH; or is used to indicate that the terminal device is in the first The first DCI is received on the resource information of the PDCCH.
  • the first indication information indicates that the sDCI is transmitted in the time domain location, the frequency domain location or the time-frequency domain location of the PDCCH; or the sDCI is sent in the time domain location, the frequency domain location or the time-frequency domain location of the sPDCCH.
  • the resource information of the downlink sTTI structure for transmitting the sPDCCH and the indication manner of the resource information for transmitting the sDCI are also given. It should be noted that the resource information for sending the sPDCCH and the sDCI in the embodiment of the present invention is only for the purpose of illustrating the technical solution of the present invention, and is not limited in the embodiment of the present invention.
  • the second message may further include third indication information of the number of symbols of the first PDCCH.
  • the third indication information is used to indicate the number of symbols of the sPDCCH in the sTTI.
  • the base station may determine the number of symbols of the first PDCCH according to the bandwidth allocated for the terminal device included in each subframe; or the base station may determine, according to the first downlink control information DCI level information.
  • the number of symbols of a PDCCH may be determined according to the bandwidth allocated for the terminal device included in each subframe.
  • the base station needs to pre-configure the bandwidth threshold of the terminal device, the relationship between the bandwidth threshold and the symbol of the sPDCCH, and/or the relationship between the sDCI level and the number of sPDCCH symbols.
  • the bandwidth configured for the terminal device reaches a preset threshold
  • the number of symbols of the sPDCCH is determined according to the preset threshold.
  • the base station may determine the number of symbols of the sPDCCH according to the information of the sDCI level. For example, when the level of the sDCI is pre-configured by the base station to be two-stage sDCI, the number of symbols of the sPDCCH is one OFDM symbol. Then, the base station determines whether the sDCI is a two-level sDCI, and if it is a two-stage sDCI, determines that the number of symbols of the sPDCCH is one OFDM symbol.
  • the number of symbols of the sPDCCH is two OFDM symbols, which is not limited in the embodiment of the present invention.
  • the third indication message is used to indicate that the terminal device receives the number of symbols of the first PDCCH on the short physical control format indication channel sPCFICH.
  • the base station may send the symbol number information of the first PDCCH on the short physical control format indication channel sPCFICH.
  • the sPCFICH is a physical control format indication channel in the short TTI, and the role of the PCFICH in the prior art is the same.
  • the symbol number information of the first PDCCH needs to be sent on the sPCFICH of each short TTI.
  • the terminal device receives the symbol number information of the sPDCCH transmitted by the base station through the sPCFICH.
  • the method for transmitting a physical downlink transmission channel provided by the embodiment of the present invention saves resources.
  • the base station may also configure the symbol number of the sPSCCH as a fixed number of symbols.
  • the base station can configure the number of symbols of the sPDCCH whose transmission duration sTTI is 2 OFDM symbols to be 1 OFDM symbol.
  • the number of symbols of the sPDCCH whose transmission duration sTTI is 7 OFDM symbols is 1 OFDM symbol or 2 OFDM symbols.
  • the base station may send a second message to the terminal device by means of signaling, where the second message is signaling.
  • the second message may be Radio Resource Control (RRC) signaling or System Information Blocks (SIB) signaling.
  • RRC Radio Resource Control
  • SIB System Information Blocks
  • the number of symbols of the sPDCCH when the number of symbols of the sPDCCH is a fixed number of symbols, the number of symbols of the sPDCCH cannot be reconfigured or changed within the sTTI.
  • the transmission method of the physical downlink control channel provided by the embodiment of the present invention can save resources, and the number of symbols of the first PDCCH can be flexibly indicated by signaling, that is, the second message.
  • the required number of sPDCCH symbols may be indicated by physical signaling or higher layer signaling, such as RRC signaling, downlink control information, or SIB signaling.
  • the method 100 may further include:
  • the terminal device determines resource information of the first DCI according to the first message and the second message, and determines a symbol number of the first PDCCH according to the third message.
  • the terminal device receives the third message sent by the base station, and determines the number of symbols of the sPDCCH according to the third message.
  • the third message may be RRC signaling or SIB signaling. After receiving the third message sent by the base station, the terminal device determines the number of symbols of the sPDCCH according to the third message.
  • the number of symbols of the sPDCCH is flexibly configured by using the solution provided by the embodiment of the present invention.
  • the base station may also instruct the terminal device to reconfigure the number of symbols of the sPDCCH by sending a third message to the terminal device.
  • the number of symbols of the sPDCCH may also be written in the protocol. At this time, if there is an sPDCCH and the number of symbols of the sPDCCH, the base station is not required to transmit the number of symbols indicating the sPDCCH to the terminal device.
  • the third indication information is further used to indicate that the number of symbols of the first PDCCH is received on the resource information of the second PDCCH of the terminal device; or that is used to indicate that the terminal device receives the first PDCCH on the resource information of the first PDCCH. The number of symbols.
  • the base station may configure that the number of symbols of the sPDCCH is transmitted in a time domain position, a frequency domain location, or a time-frequency domain location of the PDCCH or the sPDCCH.
  • the base station configures the number of symbols of the sPDCCH to be transmitted on the PDCCH; if it is a two-stage sDCI, the base station configures the DCI of the subframe level of the two-level DCI to indicate the sPDCCH where the two-stage sDCI is located. The number of symbols.
  • the base station may configure the number of symbols of the sPDCCH through the first sDCI of the first slot or the two-stage sDCI.
  • the first-level sDCI may be sent in resource information of the PDCCH or resource information of the sPDCCH.
  • the number of symbols of the sPDCCH is transmitted on the first OFDM symbol of the second slot.
  • the base station After determining the number of symbols of the sPDCCH, the base station transmits third indication information including the number of symbols of the sPDCCH to the terminal device.
  • the method for transmitting the physical downlink control channel provided by the embodiment of the present invention further provides an indication method of the sDCI level according to the prior art, which is specifically as follows:
  • the second message may further include fourth indication information of the first downlink control information DCI level.
  • the base station Before the terminal device receives the fourth indication information sent by the base station, or before the base station sends the fourth information to the terminal device, the base station needs to determine the first DCI level, that is, the sDCI level information.
  • the base station may determine the information of the first DCI level by using the transmission mode.
  • the base station can associate the sDCI level with the transfer mode (TM) in the current protocol, and configure TM1, TM2, TM3, TM4, TM6, TM9, and TM10 to be used for the sTTI frame structure type 1; or, configure TM1.
  • TM2, TM3, TM4, TM6, TM8, TM9, TM10 can be used for sTTI frame structure type 2.
  • the base station determines different sDCI levels according to different transmission modes, and indicates to the terminal device by using indication information.
  • the base station may further determine the first DCI level information according to the resource information of the transmission duration, where the resource information of the transmission duration may include a pre-configured time-frequency resource of the transmission duration or a transmission duration in advance.
  • the resource information of the transmission duration may include a pre-configured time-frequency resource of the transmission duration or a transmission duration in advance.
  • a specific time-frequency resource area configured may also be called a resource pool.
  • the base station is configured to be in the time-frequency resource or the resource pool.
  • the base station only sends two levels of sDCI and indicates to the terminal device through the indication information.
  • the terminal device only needs to detect the two-level sDCI in the time-frequency resource or resource pool.
  • the base station sends only one level of sDCI in the time-frequency resource or the resource pool, and indicates to the terminal device by using the indication information, and the terminal device only needs to detect the first-level sDCI in the time-frequency resource or the resource pool.
  • the base station may configure the sDCI level information to be sent on the resource information of the PDCCH.
  • the sDCI indicates whether a certain terminal device is a primary DCI or a two-level DCI in the sDCI.
  • the sDCI indicates that the terminal device in the subframe is a primary DCI or a two-level DCI.
  • the fourth indication information may be used to indicate that the terminal device receives the information of the first DCI level on the resource information of the second PDCCH.
  • the base station transmits the time domain location, the frequency domain location or the time of the PDCCH to the terminal device.
  • the fourth indication of the sDIC level transmitted at the frequency domain location.
  • the terminal device receives the fourth indication information sent by the base station, and determines the level of the sDCI to be received according to the fourth indication information.
  • the method 100 may further include:
  • the fourth message is used to indicate that the terminal device receives the level of the first downlink control information DCI, and the fourth message includes the fifth indication information of the first downlink control information DCI level.
  • the terminal device determines resource information of the first DCI according to the first message and the second message, and determines a level of the first DCI to be sent according to the fourth message.
  • the base station can directly configure the sDCI level. For example, by at least one of RRC signaling or SIB signaling.
  • the terminal device After receiving the indication information of the sDCI level sent by the base station, the terminal device determines, according to the indication information, whether the sDCI level to be received is a level 1 sDCI or a level 2 sDCI, and receives a corresponding level of sDCI according to the determined sDCI level.
  • the second physical downlink control channel PDCCH mentioned in FIG. 10 to FIG. 13 is an existing or legacy physical downlink control channel, abbreviated as PDCCH.
  • the first physical downlink control channel PDCCH is a physical downlink control channel in the sTTI, which is abbreviated as sPDCCH.
  • the first downlink control information DCI is downlink control information in the sTTI, and is abbreviated as sDCI.
  • FIG. 10 is a schematic diagram of a base station according to an embodiment of the present invention. As shown in FIG. 10, the base station 300 can include a transmitting unit 310.
  • the sending unit 310 is configured to send the first message to the terminal device.
  • the first message is used to indicate at least one of a transmission mode information and a transmission duration type.
  • the first message may be an identifier of the transmission mode information.
  • the terminal device receives the identifier of the transmission mode information sent by the base station, the resource information of the first DCI is determined according to the identifier of the transmission duration information.
  • the transmission mode information is one of transmission duration information.
  • the transmission duration information may include at least one of transmission mode information or transmission duration sTTI type.
  • the first message may be that the base station sends the number of symbols of the second physical downlink control channel PDCCH to the terminal device by using the physical control format indication channel PCFICH.
  • the number of symbols of the second PDCCH is used by the terminal device to determine at least one of the transmission mode information and the transmission duration type, and further determines the resource information of the first DCI.
  • the base station needs to configure different downlink sTTI structures according to different symbol numbers of the PDCCH, and the downlink sTTI structure includes information such as the transmission duration sTTI type and the transmission mode information, and configures the sPDCCH for the configured downlink sTTI structure.
  • Resource information and resource information for transmitting sDCI wherein the resource information includes a time domain location, a frequency domain location, or a time-frequency domain location.
  • determining, by the base station, the number of symbols of the PDCCH according to the channel quality and the like determining, by the base station, the downlink sTTI structure of the downlink control information to be used, that is, at least one of the sTTI type or the transmission mode information, and determining the determined downlink sTTI structure and the
  • the resource information of the sPDCCH and the sDCI resource information corresponding to the downlink sTTI structure are sent to the terminal device, so that the terminal device receives the downlink sTTI structure sent by the base station and the resource information of the sDCI, and determines which The sDCI is received on the resource information.
  • the base station is configured by the base station, and the base station configures the transmission duration information, and sends the indication information of the transmission mode information, that is, the identifier of the transmission mode or the number of symbols of the PDCCH to the terminal device; or sends the transmission duration information and the first downlink. Controlling the first indication information of the resource information of the information DCI, so that the terminal device UE determines to receive the resource information of the first DCI, and according to the resource of the first DCI The information receives the first DCI.
  • transmission duration type and the transmission mode information For details of the transmission duration type and the transmission mode information, refer to the description of the transmission duration type and the transmission mode information in the transmission method 100 of the physical downlink control channel, which will not be described herein for brevity.
  • the second message may further include second indication information of resource information of the first physical downlink control channel PDCCH.
  • the second indication information may include the OFDM symbol that is occupied by the first transmission duration of the second physical downlink control channel PDCCH, and the OFDM symbol is used except the OFDM symbol occupied by the second PDCCH.
  • the description of the manner in which the second indication information indicates that the first PDCCH is sent that is, the method for transmitting the sPDCCH, in the transmission method of the physical downlink control channel, which is not described here.
  • the second indication information indicates that the manner of transmitting the sPDCCH is only one or several specific implementation manners provided by the embodiment of the present invention, in the embodiment of the physical downlink control channel transmission method.
  • the base station may also be configured with other modes for transmitting the sPDCCH, which is not limited in the embodiment of the method for transmitting the physical downlink control channel, and the embodiment of the present invention belongs to the same invention concept as the embodiment of the method for transmitting the physical downlink control channel. Therefore, in the embodiment of the present invention, the manner of indicating the transmission of the sPDCCH is not limited.
  • the first indication information may be used to indicate that the terminal device receives the first DCI on the resource information of the second PDCCH, or is used to indicate that the terminal device receives the resource information of the first PDCCH.
  • First DCI may be used to indicate that the terminal device receives the first DCI on the resource information of the second PDCCH, or is used to indicate that the terminal device receives the resource information of the first PDCCH.
  • the second message further includes third indication information of the number of symbols of the first PDCCH, so that the terminal device receives the indication information that is sent by the base station and includes the number of symbols of the first PDCCH, The number of symbols receiving the first PDCCH is determined.
  • the base station 300 further includes a processing unit 320.
  • the processing unit 320 is configured to determine, according to the bandwidth allocated for the terminal device included in each subframe, the number of symbols of the first PDCCH.
  • the base station needs to preset the threshold of the bandwidth, and the number of symbols of the first PDCCH corresponding to the bandwidth threshold.
  • the processing unit 320 determines that the bandwidth allocated for the terminal device exceeds a preset threshold, the number of symbols of the first PDCCH is determined.
  • the processing unit 320 is further configured to:
  • the base station needs to pre-configure the number of symbols of the first PDCCH corresponding to the first DCI level, so that the processing unit determines the number of symbols of the first PDCCH to be used according to the level of the first DCI.
  • the number of symbols of the first PDCCH may be a fixed number of symbols.
  • the base station can set the number of symbols of the sPDCCH whose sTTI is 2 OFDM symbols to 1 OFDM symbol.
  • the number of symbols of the sPDCCH whose transmission duration sTTI is 7 OFDM symbols is 1 OFDM symbol or 2 OFDM symbols.
  • the base station may notify the terminal device of the number of symbols of the sPDCCH by means of signaling indication.
  • the third indication information is used to indicate that the terminal device receives the number of symbols of the first PDCCH on the resource information of the second PDCCH; or that the terminal device receives the number of symbols of the first PDCCH on the resource information of the first PDCCH.
  • the sending unit 310 is further configured to:
  • the third message may be physical layer signaling or higher layer signaling, such as RRC signaling or SIB signaling.
  • the base station may send a third message to the terminal device to indicate the number of symbols of the sPDCCH reconfigured by the terminal device base station.
  • the base station may also instruct the terminal device to reconfigure the number of symbols of the sPDCCH by sending a second message to the terminal device.
  • the second message may further include fourth indication information of the first downlink control information DCI level.
  • processing unit 320 is further configured to:
  • the processing unit 320 determines the information of the first DCI level according to the transmission mode.
  • the base station may associate the sDCI level with the transmission mode, and configure different transmission modes to send sDCIs of different sDCI levels, so that the processing unit 320 determines the information of the sDCI level according to the transmission mode.
  • processing unit 320 the processing unit 320
  • the information of the first DCI level is determined according to the resource information of the transmission duration; wherein the resource information of the transmission duration includes time-frequency resource information of the pre-configured transmission duration.
  • the resource information of the transmission duration includes time-frequency resource information of the pre-configured transmission duration.
  • the fourth indication information includes:
  • the sending unit 310 is further configured to:
  • the fourth message is sent to the terminal device, where the fourth message is used to indicate that the terminal device receives the level of the first downlink control information DCI, and the fourth message includes the fifth indication information of the first downlink control information DCI level.
  • the sending unit 310 of the base station may directly pass physical layer signaling or At least one of the higher layer signaling, such as RRC signaling or SIB signaling, indicates the sDCI level at which the terminal device transmits the sDCI.
  • the indication information of the sDCI level may not be indicated to the terminal device by using the second message.
  • the base station 300 may complete the methods/steps S210, S220, S240, and S250 executed by the base station in the method 200 for transmitting the physical downlink control channel provided in FIG. 3 to FIG.
  • the technical effects achieved by the various schemes in FIG. 9 to FIG. 9 are described briefly, and are not described herein again.
  • the sending unit may be a transmitter
  • the processing unit may be a processor
  • FIG. 11 is a terminal device according to an embodiment of the present invention. As shown in FIG. 11, the terminal device 400 may include a receiving unit 410 and a processing unit 420.
  • the receiving unit 410 is configured to receive the first message from the base station.
  • the processing unit 420 is configured to determine at least one of the transmission duration information and the transmission duration type according to the first message.
  • the processing unit 420 is configured to determine resource information of the first DCI according to at least one of a transmission duration information and a transmission duration type.
  • the receiving unit 410 is further configured to receive the first DCI according to the resource information of the first DCI.
  • the receiving unit 410 when receiving the first message sent by the base station, may include: receiving an identifier of the transmission mode information sent by the base station.
  • the processing unit 420 determines the transmission mode information according to the identifier according to the transmission mode information, and determines the resource information of the first DCI according to the transmission mode information.
  • the transmission mode information and/or the transmission duration type may be collectively referred to as transmission duration information.
  • the first message includes a symbol number of the second physical downlink control channel PDCCH.
  • the receiving unit 410 receives the number of symbols of the second physical downlink control channel PDCCH that the base station sends through the physical control format indication channel PCFICH.
  • the processing unit 420 determines at least one of the transmission mode information and the transmission duration type according to the number of symbols of the second PDCCH; and determines the resource information of the first DCI according to at least one of the transmission mode information and the transmission duration type.
  • the receiving unit 410 is further configured to receive a second message sent by the base station, where the second message includes first indication information of the resource information of the first DCI.
  • the processing unit 420 determines resource information of the first DCI according to at least one of the transmission mode information, the transmission duration type, and the first message.
  • the terminal device configureds the downlink sTTI structure according to the number of symbols of the PDCCH in advance, and configures the downlink sTTI structure to transmit the resource information of the sPDCCH and the resource information of the sDCI, and notifies the terminal device by using the indication method.
  • Different downlink sTTI structures are flexibly configured according to the number of symbols of different PDCCHs.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • transmission duration type and the transmission mode information For details of the transmission duration type and the transmission mode information, refer to the description of the transmission duration type and the transmission mode information in the transmission method 100 of the physical downlink control channel, which will not be described herein for brevity.
  • the second message further includes:
  • the second indication information is used to indicate that the terminal device occupies the OFDM symbol occupied by the first transmission duration after the second physical downlink control channel PDCCH, except for the second PDCCH.
  • the description process of the manner in which the second indication information indicates the sPDCCH in the method for transmitting the physical downlink control channel in the embodiment For a detailed description of the embodiment, refer to the description process of the manner in which the second indication information indicates the sPDCCH in the method for transmitting the physical downlink control channel in the embodiment. For brevity, the details are not described herein again.
  • the first indication information is used to indicate that the terminal device receives the first DCI on the resource information of the second PDCCH; or is used to indicate that the terminal device receives the resource information of the first PDCCH.
  • First DCI is used to indicate that the terminal device receives the resource information of the second PDCCH.
  • the second message further includes third indication information of the number of symbols of the first PDCCH.
  • the number of symbols of the first PDCCH is a fixed number of symbols.
  • the third indication information is used to indicate that the terminal device receives the number of symbols of the first PDCCH on the resource information of the second PDCCH, or is used to indicate the resource of the terminal device in the first PDCCH.
  • the number of symbols of the first PDCCH is received on the information.
  • the receiving unit 410 is further configured to:
  • the second message may further include fourth indication information of the first downlink control information DCI level.
  • the fourth indication information may be used to indicate that the terminal device receives the information of the first DCI level on the resource information of the second PDCCH.
  • the receiving unit 310 is further configured to:
  • the third message or the fourth message includes at least one of physical layer signaling or higher layer signaling.
  • Physical layer signaling or higher layer signaling may be RRC letter At least one of a command, SIB signaling, or downlink control information.
  • the terminal device 400 provided by the embodiment of the present invention may complete the method/step performed by the terminal device in the method 200 for transmitting the physical downlink control channel provided in FIG. 3 to FIG. 9 , and may also reach FIG. 3 to FIG. 9 .
  • the technical effects achieved by each scheme are briefly described and will not be described here.
  • the receiving unit may be a receiver
  • the processing unit may be a processor
  • FIG. 12 is a schematic diagram of a base station according to an embodiment of the present invention.
  • the base station 500 can include a transmitter 510 and a processor 520.
  • the transmitter 510 is configured to send the first message to the terminal device.
  • the first message is used to indicate at least one of a transmission mode information and a transmission duration type.
  • the first message may be an identifier of the transmission mode information, so that when the terminal device receives the identifier of the transmission mode information sent by the base station, the transmission mode information is determined according to the identifier of the transmission mode information.
  • the transmission duration sTTI type and/or transmission mode information may be collectively referred to as transmission duration information.
  • the first message may be that the base station sends the number of symbols of the second physical downlink control channel PDCCH to the terminal device by using the physical control format indication channel PCFICH.
  • the number of symbols of the second PDCCH is used by the terminal device to determine resource information for sending the first DCI.
  • the first message may also be transmission duration information that is sent by the base station to the terminal device.
  • the transmitter 510 of the base station needs to send the second message to the terminal device, where the second message includes the first indication information of the resource information of the first downlink control information DCI, so that the terminal device can obtain the information according to the transmission mode.
  • the second message includes the first indication information of the resource information of the first downlink control information DCI, so that the terminal device can obtain the information according to the transmission mode.
  • At least one of the transmission duration types and the first indication information determine resource information for receiving the first DCI.
  • the resource information may be a time domain location, a frequency domain location, or a time-frequency domain location.
  • the base station needs to configure the downlink sTTI structure according to the number of symbols of the PDCCH in advance, and configure the downlink sTTI structure to send the sPDCCH resource information and the sDCI resource information, and notify the terminal device by using the indication method, so as to facilitate The terminal device receives the sDCI.
  • Different downlink sTTI structures are flexibly configured according to the number of symbols of different PDCCHs.
  • the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • the second message further includes second indication information of resource information of the first physical downlink control channel PDCCH.
  • the second indication information is used to indicate that the terminal device receives the first PDCCH on the OFDM symbol except the OFDM symbol occupied by the second PDCCH in the OFDM symbol occupied by the first transmission duration; or Instructing the terminal device to receive the first PDCCH on the start OFDM symbol of each transmission duration; or to indicate that the first PDCCH is received on the common OFDM symbol of the transmission mode information.
  • the first indication information is used to indicate
  • the terminal device receives the first DCI on the resource information of the second PDCCH; or is used to instruct the terminal device to receive the first DCI on the resource information of the first PDCCH.
  • the second message further includes third indication information of the number of symbols of the first PDCCH.
  • processor 520 is further configured to:
  • the number of symbols of the first PDCCH is determined according to the bandwidth allocated for the terminal device included in each subframe.
  • processor 520 is further configured to:
  • the number of symbols of the first PDCCH is a fixed number of symbols.
  • the third indication information is used to indicate resource information of the terminal device in the second PDCCH.
  • the number of symbols of the first PDCCH is received on the first PDCCH; or is used to indicate the number of symbols of the first PDCCH received on the resource information of the first PDCCH.
  • the sender 510 is further configured to send a third message to the terminal device, where the third message is used to indicate that the number of symbols of the first PDCCH is reconfigured.
  • the first message further includes fourth indication information of the first downlink control information DCI level.
  • the processor 520 is further configured to determine information of the first DCI level.
  • the processor 520 is configured to determine information of the first DCI level according to the transmission mode.
  • the processor 520 is configured to determine information of the first DCI level according to the resource information of the transmission duration.
  • the resource information of the transmission duration includes time-frequency resource information of a pre-configured transmission duration.
  • the fourth indication information is used to indicate that the terminal device sends the information of the first DCI level on the resource information of the second PDCCH.
  • the transmitter 510 is further configured to send a fourth message to the terminal device, where the fourth message is used to indicate that the terminal device receives the level of the first downlink control information DCI, and the fourth message includes the first downlink control information.
  • the fifth indication of the DCI level is further configured to send a fourth message to the terminal device, where the fourth message is used to indicate that the terminal device receives the level of the first downlink control information DCI, and the fourth message includes the first downlink control information.
  • the fifth indication of the DCI level is further configured to send a fourth message to the terminal device, where the fourth message is used to indicate that the terminal device receives the level of the first downlink control information DCI, and the fourth message includes the first downlink control information.
  • the fifth indication of the DCI level is further configured to send a fourth message to the terminal device, where the fourth message is used to indicate that the terminal device receives the level of the first downlink control information DCI, and the fourth message includes the first downlink control information.
  • the fifth indication of the DCI level is further
  • the third message or the fourth message includes at least one of physical layer signaling or higher layer signaling.
  • the base station 500 provided by the embodiment of the present invention may perform the method/steps S110, S120, S140, S150, S160, S170 performed by the base station in the method 100 for transmitting the physical downlink control channel provided in FIG. 3 to FIG. S180 and S190, and the base station 500 provided by the embodiment of the present invention may also support the method/steps S110, S120 performed by the base station in the method 200 for transmitting the physical downlink control channel provided by the base station 300 provided in FIG. S140, S150, S160, S170, S180, and S190 can also achieve the technical effects achieved by the various solutions in FIG. 3 to FIG. 9, which are not described herein for brevity.
  • FIG. 13 is a terminal device according to an embodiment of the present invention. As shown in FIG. 12, the terminal device 600 can include a receiver 610 and a processor 620.
  • the receiver 610 is configured to receive the first message from the base station.
  • the processor 620 is configured to determine at least one of the transmission mode information and the transmission duration information according to the first message.
  • the processor 620 is further configured to determine resource information of the first DCI according to at least one of the transmission mode information and the transmission duration information.
  • the transmission mode information and/or the transmission duration type may be collectively referred to as transmission duration information.
  • the present invention is a terminal device provided by the embodiment, the base station configures the transmission duration information, and sends the first message to the terminal device, so that the terminal device determines at least one of the transmission mode information and the transmission duration type according to the first message, and further according to the transmission. At least one of the mode information and the transmission duration type determines resource information of the first DCI, and receives the first DCI according to the resource information of the first DCI. It realizes flexible configuration of different transmission mode information, that is, the downlink sTTI structure. At the same time, the downlink transmission duration structure does not cross the slot boundary and is consistent with the uplink structure, which facilitates multiplexing of the downlink transmission duration structure; and improves the flexibility and applicability of the downlink scheduling.
  • the second message further includes second indication information of resource information of the first physical downlink control channel PDCCH.
  • the second indication information is used to indicate that the terminal device receives the first PDCCH on the OFDM symbol except the OFDM symbol occupied by the second PDCCH, in the OFDM symbol occupied by the first transmission duration after the second PDCCH. Or, for indicating that the terminal device sends the first PDCCH on the start OFDM symbol of each transmission duration; or, for indicating that the terminal device receives the first PDCCH on the common OFDM symbol of the transmission mode information.
  • the first indication information may be used to indicate that the terminal device receives the first DCI on the resource information of the second PDCCH; or to indicate that the terminal device receives the first DCI on the resource information of the first PDCCH.
  • the second message may further include third indication information of the number of symbols of the first PDCCH.
  • the number of symbols of the first PDCCH may be a fixed number of symbols.
  • the third indication information is used to indicate that the terminal device receives the number of symbols of the first PDCCH on the resource information of the second PDCCH, or is used to indicate that the terminal device receives the first PDCCH on the resource information of the first PDCCH. The number of symbols.
  • the receiver 610 is further configured to receive a third message sent by the base station, where the third message is used to indicate that the number of symbols of the first PDCCH is reconfigured.
  • the second message may further include fourth indication information of the first downlink control information DCI level.
  • the fourth indication information may be used to indicate that the terminal device receives the first DCI level on the resource information of the second PDCCH.
  • the receiver 610 is further configured to:
  • Receiving a fourth message sent by the base station where the fourth message is used to indicate the level of receiving the first downlink control information DCI, and the fourth message includes the fifth indication information of the first downlink control information DCI level.
  • the second message or the third message may include at least one of physical layer signaling or higher layer signaling.
  • the terminal device 600 may perform the method/step performed by the terminal device in the method 100 and the method 200 of the physical downlink control channel provided in FIG. 3 to FIG.
  • the terminal device 600 can also support the method/step performed by the base station 400 in the transmission methods 100 and 200 of the physical downlink control channel provided in FIG. 3 to FIG. 9 , which can also be implemented in FIG. 3 to FIG. 9 .
  • the technical effects achieved by each scheme are briefly described and will not be described here.
  • the base station 500 provided in FIG. 12 and the processor 52/620 in the terminal device 600 provided in FIG. 13 may be a central processing unit (CPU), and may be other general-purpose processors and digital signal processors. (DSP), application specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 520/620 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor 520/620 reads the information in the memory and combines the hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the base station 500 provided in FIG. 12 may include a receiver 530, and the receiver 530 is configured to receive a message sent by the terminal device or other device.
  • the terminal device 600 provided in FIG. 13 may further include a receiver 630, configured to receive a message sent by the base station and other devices, for example, indication information of resource information of the sDCI sent by the base station to the terminal device, and indication information of the number of symbols of the sPDCCH. ,and many more.
  • the base station 500 provided in FIG. 12 may include a memory 540
  • the terminal device 600 provided in FIG. 13 may include a memory 640.
  • the memory is used to store instructions and data.
  • Memory 540/640 can include read only memory and random access memory and provides instructions and data to processor 520/620. A portion of the memory may also include a non-volatile random access memory.
  • the disclosed method for transmitting a base station, a terminal device, and a physical downlink control channel may be implemented in other manners.
  • the base station and the terminal device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, may be located A place, or it can be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method of various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明涉及一种物理下行控制信道的传输方法、终端设备和基站，该方法包括：终端设备从基站接收第一消息；根据第一消息确定传输方式信息、传输时长类型中的至少一个；根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息。通过本发明实施例提供的物理下行控制信道的传输方法，终端设备通过从基站接收的第一信息确定接收第一DCI的资源信息，实现了灵活配置不同的传输方式信息，即下行传输时长结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用，同时提高了下行调度的灵活性和适用性。

Description

物理下行控制信道的传输方法、终端设备和基站 技术领域
本发明涉及通信领域，尤其涉及一种物理下行控制信道的传输方法、终端设备和基站。
背景技术
在长期演进(Long Term Evolution，LTE)通信***中，为了支持不同的下行控制信息(Downlink Control Information，DCI)格式(format)以提高资源利用率，通过不同聚合等级(Aggregation Level)的下行控制信道(Physical Downlink Control Channel，PDCCH)来承载不同大小的下行控制信息DCI。其中，下行控制信道(Physical Downlink Control Channel，PDCCH)有4中格式{0，1，2，3}分别对应聚合等级{1，2，4，8}，其中，聚合等级表示一个PDCCH占用的连续控制信道粒子(Control Channel Element，CCE)的个数。例如，若PDCCH是发送给某个下行信道质量较好的终端设备，则使用1个CCE来发送PDCCH；若PDCCH是发送给某个下行信道质量较差的UE，则使用聚合等级高的CCE，如8个CCE发送PDCCH，以通过提高聚合等级来提高更健壮的编码和可靠性。
在下行控制信道的传输过程中，PDCCH符号数由物理控制格式指示信道(Physical Control Format Indicator Channel，PCFICH)信道指示，PCFICH用于通知终端设备对应下行控制帧的控制区域的大小，即控制区域所占的OFDM符号(symbol)的个数，或者说，PCFICH用于指示一个下行子帧中用于传输PDCCH的OFDM符号的个数。PCFICH在每个被调度的发送时间间隔(Transmission Time Interval，TTI)都会下发，且是可以动态变化的，换句话讲，在下行控制信道的传输过程中，PDCCH符号数是可以变化的。UE在 每个TTI都需要重新计算控制区域所占用的OFDM符号的个数对应的不同情况。
在时域上，上、下行都以***帧结构传输，每个***帧为10ms。LTE支持两种帧结构：用于频分双工(Frequency Division Duplex，FDD)的帧结构类型1与用于时分双工(Time Division Duplex，TDD)的帧结构类型2。在FDD帧结构中，如图1所示，包括10个子帧，子帧长度为1ms，每个子帧包括两个连续的时隙(slot)，一个***帧内的时隙编号为0-19。对于FDD而言，上、下行传输是通过频域区分开的。在每一个10ms内，各有10个子帧可用于上行传输和下行传输。每个发送时间间隔TTI为1ms，等于子帧的长度。
在LTE低时延技术讨论过程中，引入了上行，下行可以用短TTI(Short TTI)可以称为“传输时长”，并在3GPP无线接入网络(Radio Access Network，RAN)第72次会议已同意：下行短TTI可以为2个OFDM符号或7个OFDM符号，上行短TTI可以为2个OFDM符号，4个OFDM符号或7个OFDM符号，其中，OFDM符号可以简写为“OS”。
现有技术中已经存在多种下行短TTI结构，但并没有对下行短TTI如何配置以及通知终端设备的方式进行研究，本发明对基站配置的下行短TTI结构以及通知给终端设备的方式进行研究。
发明内容
本发明实施例提供了一种物理下行控制信道的传输方法、终端设备和基站，根据PDCCH符号数配置传输时长的传输方式信息，即下行短TTI结构，实现了下行短TTI结构不跨时隙(slot)边界，与上行结构一致，提高了下行调度的灵活性和适用性。
第一方面，本发明实施例提供了一种物理下行控制信道的传输方法，该方法可以包括：
终端设备从基站接收第一消息；其中第一消息可以为传输时长信息中传输方式信息的指示信息，例如：传输方式信息的指示信息为传输方式信息的标识，或者第二物理下行控制信道PDCCH的符号数，其中第二PDCCH为现有物理下行控制信道。
终端设备根据第一消息确定传输方式信息、传输时长类型中的至少一个。
终端设备根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息。
若第一消息为传输方式的标识根据传输方式信息的标识确定传输方式信息，即下行传输时长结构，并确定第一下行控制信息DCI的资源信息，以便于根据第一DCI的资源信息接收第一DCI。
或者，若第一消息为PDCCH的符号数，则根据PDCCH的符号数确定下行传输时长结构，并确定第一下行控制信息DCI的资源信息，以便于根据第一DCI的资源信息接收第一DCI。
其中，传输方式信息和/或传输时长类型可以统称为传输时长信息。第一DCI为在短TTI中，第一物理下行控制信道PDCCH，即sPDCCH上承载的下行控制信息，可以称为sDCI。第一物理下行控制信道PDCCH为短TTI对应的物理下行控制信道。
采用本发明实施例提供的物理下行控制信道的传输方法，基站配置传输时长信息，并向终端设备发送传输时长信息的指示信息，以便于终端设备确定接收第一DCI的资源信息，并根据第一DCI的资源信息接收第一DCI，实现了灵活配置不同的传输方式信息，即下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
结合第一方面，在第一方面的第一种可能实现的方式中，第一消息可以包括：
传输方式信息的标识；
终端设备根据传输方式信息的标识确定传输方式信息。
结合第一方面，在第一方面的第二种可能实现的方式中，第一消息可以包括第二物理下行控制信道PDCCH的符号数；该第二PDCCH的符号数可以为基站通过物理控制格式信道PCFICH发送的。
终端设备根据第二PDCCH的符号数确定传输时长信息，其中，传输时长信息可以包括传输方式信息、传输时长类型中的至少一个。
实现了对于不同第二PDCCH的符号数灵活配置不同的传输方法信息，即下行传输时长结构。
结合第一方面，在第一方面的第三种可能实现的方式中，该方法还包括：
终端设备从基站接收第二消息，第二消息包括第一DCI的资源信息的第一指示信息。
结合第一方面的第三种可能实现的方式，在第一方面的第四种可能实现的方式中，根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息，包括：
根据传输方式信息、传输时长类型中的至少一个和第二消息确定第一DCI的资源信息。
结合第一方面的第三种可能实现的方式或第四种可能实现的方式，在第一方面的第五种可能实现的方式中，第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
结合第一方面的第五种可能实现的方式，在第一方面的第六种可能实现的方式中，第二指示信息用于指示终端设备在第二物理下行控制信道PDCCH后的第一个传输时长所占有的OFDM符号中，除第二PDCCH所占用的OFDM符号之外的OFDM符号上接收第一PDCCH；或者，用于指示终端设备在每个传输时长的起始OFDM符号上接收第一PDCCH；或者，用于指示终端设备在传输方式信息的公共OFDM符号上接收第一PDCCH。
结合第一方面的第五种可能实现的方式，或者第一方面的第六种可能实现的方式，在第一方面的第七种可能实现的方式中，第一指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一DCI；或者，指示终端设备在第一PDCCH的资源信息上接收第一DCI。
采用本发明的技术方案，相对现有技术给出了在下行传输时长结构上发送第二下行控制信道PDCCH的资源信息的指示信息，以及发送第一下行控制信息DCI的资源信息的指示信息，即在下行传输时长结构上配置了终端设备接收第二下行控制信道PDCCH的资源信息，以及配置了终端设备接收第一DCI的资源信息。
结合第一方面的第三种可能实现的方式至第一方面的第七种可能实现的方式的任一可能实现的方式，在第一方面的第八种可能实现的方式中，第二消息还包括第一PDCCH的符号数的第三指示信息。本发明实施例提供的方案相对现有技术给出了第一PDCCH的符号数的指示方法。
在本发明的一个设计方案中，第三指示信息用于指示终端设备在短物理控制格式指示信道(short Physical Control Format Indicator Channel，sPCFICH)上接收第一PDCCH的符号数。其中，sPCFICH为短TTI中的物理控制格式指示信道，与现有技术中PCFICH的作用相同，第一PDCCH占用的符号数信息需要在每个短TTI的sPCFICH上携带。
结合第一方面的第八种可能实现的方式，在第一方面的第九种可能实现的方式中，第一PDCCH的符号数为固定符号数。
本发明实施例提供的方案通过第一PDCCH的符号数为固定符号数节省了资源。同时，通过信令，即第二消息灵活指示了第一PDCCH的符号数。
结合第一方面的第八种可能实现的方式或第一方面的第九种可能实现的方式，在第一方面的第十种可能实现的方式中，第三指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一PDCCH的符号数；或者； 用于指示终端设备在第一PDCCH的资源信息上接收第一PDCCH的符号数。
结合第一方面的第三种可能实现的方式至第一方面的第十种可能实现的方式中的任一可能实现的方式，在第一方面的第十一种可能实现的方式中，该方法还包括：
终端设备从基站接收第三消息，第三消息用于指示重配置第一PDCCH的符号数。本发明实施例提供的方案通过信令，即第三消息灵活配置了第一PDCCH的符号数。
结合第一方面的第三种可能实现的方式至第一方面的第十一种可能实现的方式中的任一可能实现的方式，在第一方面的第十二种可能实现的方式中，第一消息还包括第一下行控制信息DCI级别的第四指示信息。
本发明实施例提供的方案相对现有技术给出了第一DCI级别的指示方法。
结合第一方面的第十二种可能实现的方式，在第一方面的第十三种可能实现的方式中，第四指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一DCI级别信息。对于基站而言，该第一DCI级别信息为发送第一DCI的级别，例如发送的第一DCI为一级DCI，或者两级DCI。一级DCI，可以在每个传输时长上发送。两级DCI先发送子帧级别的DCI信息，承载的信息可以为子帧内所包括的终端设备使用，且第二PDCCH需要在每一个传输时长上都发送一次DCI信息，用于每个传输时长的调度；承载的信息为每个传输时长上每个终端设备的专有信息。
结合第一方面的第四种可能实现的方式至第一方面的第十一种可能实现的方式，在第一方面的第十四种可能实现的方式中，该方法还包括：
终端设备从基站接收第四消息，第四消息用于指示终端设备接收第一下行控制信息DCI的级别，第三消息包括第一下行控制信息DCI级别的第五指示信息。
结合第一方面的第十一种可能实现的方式或者第一方面的第十四种可能实现的方式，在第一方面的第十五种可能实现的方式中，第三消息或者第四消息包括物理层信令或者高层信令中至少一个，该物理层信令或者高层信令可以为RRC信令、SIB信令或下行控制信息。
第二方面，本发明实施例提供一种物理下行控制信道的传输方法，该方法包括：
基站向终端设备发送第一消息，第一消息用于指示传输方式信息、传输时长类型中的至少一个。
采用本发明实施例提供的物理下行控制信道的传输方法，通过向终端设备发送第一消息，指示传输方式信息、传输时长类型中的至少一个，便于终端设备根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息，并在确定的资源信息上接收第一DCI。实现了基站通过第一消息灵活配置不同的传输方法信息，即下行传输时长结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用。同时，提高了下行调度的灵活性和适用性。
结合第二方面，在第二方面的第一种可能实现的方式中，第一消息包括传输方式信息的标识，传输方式信息的标识用于指示传输方式信息。
结合第二方面，在第二方面的第二种可能实现的方式中，第一消息包括
第二物理下行控制信道PDCCH的符号数，第二PDCCH的符号数用于指示传输方式信息。
结合第二方面，在第二方面的第三种可能实现的方式中，
该方法还包括：
基站向终端设备发送第二消息，第二消息包括第一下行控制信息DCI的资源信息的第一指示信息。
结合第二方面的第三种可能实现的方式，在第二方面的第四种可能实现的方式中，传输时长信息包括传输时长类型或传输方式信息中的至少一个。
结合第二方面的第三种可能实现的方式或第二方面的第四种可能实现的方式，在第二方面的第五种可能实现的方式中，第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
结合第二方面的第五种可能实现的方式，在第二方面的第六种可能实现的方式中，第二指示信息包括用于指示终端设备在第二物理下行控制信道PDCCH后的第一个传输时长所占有的OFDM符号中，除第二PDCCH所占用的OFDM符号之外的OFDM符号上接收第一PDCCH；或者，用于指示终端设备在每个传输时长的起始OFDM符号上接收第一PDCCH；或者，用于指示终端设备在传输方式信息的公共OFDM符号上接收第一PDCCH。
结合第二方面的第五种可能实现的方式或者第二方面的第六种可能实现的方式，在第二方面的第七种可能实现的方式中，第一指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一DCI；或者，用于指示终端设备在第一PDCCH的资源信息上接收第一DCI。
本发明提供的物理下行控制信道的传输方法，配置了在下行传输时长结构上发送第一PDCCH的资源信息以及发送第一DCI的资源信息，通过指示的方法，通知给终端设备，以便于终端设备接收第一DCI。
结合第二方面的第三种可能实现的方式至第二方面的第七种可能实现的方式中的任一可能实现的方式，在第二方面的第八种可能实现的方式中，第二消息还包括第一PDCCH的符号数的第三指示信息。
本发明实施例提供的方案相对现有技术给出了第一PDCCH的符号数的指示方法。
结合第二方面的第八种可能实现的方式，在第二方面的第九种可能实 现的方式中，该方法还包括：
基站根据为每个子帧内包括的终端设备分配的带宽确定第一PDCCH的符号数。
结合第二方面的第八种可能实现的方式，在第二方面的第十种可能实现的方式中，该方法还包括：
基站根据第一下行控制信息DCI级别的信息确定第一PDCCH的符号数。
结合第二方面的第把种可能实现的方式，在第二方面的第十一种可能实现的方式中，第一PDCCH的符号数为固定符号数。
本发明实施例提供的方案通过第一PDCCH的符号数为固定符号数节省了资源。同时，通过信令，即第二消息灵活指示了第一PDCCH的符号数。
结合第二方面的第八种可能实现的方式至第二方面的第十一种可能实现的方式中的任一可能实现的方式中，在第二方面的第十二种可能实现的方式中，第三指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一PDCCH的符号数；或者，用于指示终端设备在第一PDCCH的资源信息上接收第一PDCCH的符号数。
在另一个设计方案中，第三指示信息用于指示终端设备在短物理控制格式指示信道sPCFICH上接收第一PDCCH的符号数。其中，sPCFICH为短TTI中的物理控制格式指示信道，与现有技术中PCFICH的作用相同，对于基站而言，第一PDCCH的符号数信息需要在每个短TTI的sPCFICH上携带。
结合第二方面的第三种可能实现的方式至第二方面的第十二种可能实现的方式中的任一可能实现的方式，在第二方面的第十三种可能实现的方式中，该方法还包括：
基站向终端设备发送第三消息，第三消息用于指示重配置第一PDCCH 的符号数。
本发明实施例提供的方案通过信令，即第三消息灵活配置了第一PDCCH的符号数。
结合第二方面的第三种可能实现的方式至第二方面的第十三种可能实现的方式中的任一可能实现的方式，在第二方面的第十四种可能实现的方式中，第一消息还包括第一下行控制信息DCI级别的第四指示信息。
本发明实施例提供的方案相对现有技术给出了第一DCI级别的指示方法。
结合第二方面的第十四种可能实现的方式，在第二方面的第十五种可能实现的方式中，该方法还包括：
基站确定第一DCI级别的信息。
结合第二方面的第十五种可能实现的方式，在第二方面的第十六种可能实现的方式中，基站确定第一DCI级别的信息，包括：
基站根据传输模式确定第一DCI级别的信息。
结合第二方面的第十五种可能实现的方式，在第二方面的第十七种可能实现的方式中，基站确定第一DCI级别的信息，包括：
基站根据传输时长的资源信息确定第一DCI级别的信息；
其中，传输时长的资源信息包括预配置的传输时长的时频资源信息。
结合第二方面的第十四种可能实现的方式至第二方面的第十七种可能实现的方式中的任一可能实现的方式，在第二方面的第十八种可能实现的方式中，第四指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一DCI级别的信息。
结合第二方面至第二方面的第十三种可能实现的方式中的任一可能实现的方式，在第二方面的第十九种可能实现的方式中，该方法还包括：
基站向终端设备发送第四消息，第四消息用于指示终端设备接收第一下行控制信息DCI的级别，第四消息包括第一下行控制信息DCI级别的第 五指示信息。
结合第二方面的第十三种可能实现的方式或第二方面的第十九种可能实现的方式，在第二方面的第二十种可能实现的方式中，第三消息或第四消息包括物理层信令或高层信令中至少一个。
第三方面，本发明实施例提供了一种终端设备，该终端设备包括：
接收单元，用于从基站接收第一消息；
处理单元，用于根据第一消息确定传输方式信息、传输时长类型中的至少一个；
处理单元，用于根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息。
采用本发明实施例提供的终端设备，实现了灵活配置不同的传输方式信息、传输时长类型中的至少一个，即下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
结合第三方面，在第三方面的第一种可能实现的方式中，第一消息可以包括传输方式信息的标识。
处理单元根据传输方式信息的标识确定传输方式信息。结合第三方面的第一种可能实现的方式，在第三方面的第二种可能实现的方式中，
接收单元，还用于从基站接收第二消息，第二消息包括第一DCI的资源信息的第一指示信息。
结合第三方面的第二种可能实现的方式，在第三方面的第三种可能实现的方式中，处理单元根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息，包括：
处理单元根据传输方式信息、传输时长类型中的至少一个和第二消息确定第一DCI的资源信息。
结合第三方面的第二种可能实现的方式或者第三方面的第三种可能实现的方式，在第三方面的第四种可能实现的方式中，第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
结合第三方面的第四种可能实现的方式，在第三方面的第五种可能实现的方式中，第一指示信息用于指示终端设备在第二物理下行控制信道PDCCH的资源信息上接收第一DCI；或者，第一指示用于指示终端设备在第一PDCCH的资源信息上接收第一DCI。
另外本发明实施例提供的终端设备还可以实现第一方面的第六种可能实现的方式，为简洁描述，在这里不再赘述。
第三方面的第四种可能实现的方式和第三方面的第五种可能实现的方式给出了基站发送第一PDCCH的资源信息和第一DCI的资源信息的指示信息，提高了下行调度的灵活性和适用性。
结合第三方面的第二种可能实现的方式至第三方面的第五种可能实现的方式中的任一种可能实现的方式，在第三方面的第六种可能实现的方式中，第二消息还包括第一PDCCH的符号数的第三指示信息，相对现有技术给出了第一PDCCH的符号数的指示方法其具体指示方法，可参见第一方面的第八种可能实现的方式至第一方面的第十一种可能实现的方式中的任一可能实现的方式，同样可以实现第一方面的第八种可能实现的方式至第一方面的第十一种可能实现的方式技术效果，为简洁描述，重复之处在这里不再赘述。
结合第三方面的第二种可能实现的方式至第三方面的第六种可能实现的方式中的任一种可能实现的方式，在第三方面的第七种可能实现的方式中，接收单元，还用于从基站接收第三消息，第三消息用于指示重配置第一PDCCH的符号数，通过第三消息可以灵活配置第一PDCCH的符号数。
除此外，本发明实施例提供的终端设备还可以实现第一方面的第十二种可能实现的方式至第一方面的第十五种可能实现的方式，并可以达到相 同的技术效果，为简洁描述，在这里不再赘述。
第四方面，本发明实施例提供了一种基站，该基站包括：
发送单元，用于向终端设备发送第一消息，第一消息用于指示传输方式信息、传输时长类型中的至少一个。
通过向终端设备发送第一消息，指示传输方式信息、传输时长类型中的至少一个，便于终端设备根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息，并在确定的资源信息上接收第一DCI。实现了基站通过第一消息灵活配置不同的传输方法信息，即下行传输时长结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用。同时，提高了下行调度的灵活性和适用性。
结合第四方面，在第四方面的第一种可能实现的方式中，发送单元向终端设备发送传输方式信息的标识，传输方式信息的标识用于指示传输方式信息。
结合第四方面的第一种可能实现的方式，在第四方面的第二种可能实现的方式中，发送单元，还用于向终端设备发送第二消息，第二消息用于指示第一下行控制信息DCI的资源信息的第一指示信息。
结合第四方面的第一种可能实现的方式，在第四方面的第三种可能实现的方式中，第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
在一个设计方案中，基站还可以实现第二方面的第五种可能实现的方式，为简洁描述，在这里不再赘述。
结合第四方面的第二种可能实现的方式，在第四方面的第四种可能实现的方式中，第一指示信息用于指示终端设备在第二物理下行控制信道PDCCH的资源信息上接收第一DCI；或者，第一指示信息用于指示终端设备在第一PDCCH的资源信息上接收第一DCI。
基于以上方案，给出了基站发送第一PDCCH的资源信息和第一DCI的资源信息的指示信息，提高了下行调度的灵活性和适用性。
结合第四方面的第二种可能实现的方式至第二方面的第四种可能实现的方式，在第四方面的第五种可能实现的方式中，第二消息还包括第一PDCCH的符号数的第三指示信息。
结合第四方面的第五种可能实现的方式，在第四方面的第六种可能实现的方式中，基站还包括：
处理单元，用于根据为每个子帧内包括的终端设备分配的带宽确定第一PDCCH的符号数。
结合第四方面的第五种可能实现的方式，在第四方面的第七种可能实现的方式中，基站还包括：
处理单元，用于根据第一下行控制信息DCI级别信息确定第一PDCCH的符号数。
另外本发明实施例提供的基站还具有实现第第二方面的第十一种可能实现的方式和第二方面的第十二种可能实现的方式的功能，并能达到相同的技术效果，为简洁描述，在此不再赘述。结合第四方面的第一种可能实现的方式至第四方面的第七种可能实现的方式，在第四方面的第八种可能实现的方式中，发送单元，还用于向终端设备发送第三消息，第三消息用于指示重配置第一PDCCH的符号数。
第四方面的第五种可能实现的方式至第四方面的第八种可能实现的方式，相对现有技术给出了第一PDCCH的符号数的指示方法。同时，采用第三消息指示重配置第一PDCCH的符号数，实现了第一PDCCH的符号数的灵活配置。
除此外，本发明实施例提供的基站还可以实现第二方面的第十四种可能实现的方式至第二方面的第二十种可能实现的方式，并可以达到相同的技术效果，为简洁描述，在这里不再赘述。
第五方面，本发明实施例提供了一种终端设备，该终端设备包括：接收器和处理器。
接收器，用于从基站接收第一消息。
处理器，用于根据第一消息确定传输方式信息、传输时长信息中的至少一个。
处理器，还用于根据传输方式信息、传输时长信息中的至少一个确定第一DCI的资源信息。
实现了灵活配置不同的传输方式信息、传输时长类型中的至少一个，即下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
结合第五方面，在第五方面的第一种可能实现的方式中，第一消息可以包括传输方式信息的标识。
处理器根据传输方式信息的标识确定传输方式信息。
结合第五方面的第一种可能实现的方式，在第三方面的第二种可能实现的方式中，
接收器，还用于从基站接收第二消息，第二消息包括第一DCI的资源信息的第一指示信息。
结合第五方面的第一种可能实现的方式，在第三方面的第三种可能实现的方式中，处理器根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息，包括：
处理器根据传输方式信息、传输时长类型中的至少一个和第二消息确定第一DCI的资源信息。
结合第五方面的第二种可能实现的方式，在第五方面的第三种可能实现的方式中，在第五方面的第四种可能实现的方式中，第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
在一个设计方案中第二指示信息可以实现第一方面的第六种可能实现的方式以及第一方面的第七种可能实现的方式的指示功能，以及第三方面中第二指示信息所实现的指示功能，且可以达到相同的技术效果，为简洁描述，在这里不再赘述。
在一个设计方案中，第二消息还可以包括第一PDCCH的符号数的第三指示信息。
相对现有技术给出了第一PDCCH的符号数的指示方法，其具体指示方法，可参见第一方面的第八种可能实现的方式至第一方面的第十一种可能实现的方式中的任一可能实现的方式，同样可以实现第一方面的第八种可能实现的方式至第一方面的第十一种可能实现的方式技术效果，为简洁描述，重复之处在这里不再赘述。
在一个设计方案中，第二消息还可以包括第一下行控制信息DCI级别的第四指示信息。实现了第一PDCCH的灵活配置。
除此外，本发明实施例提供的终端设备还可以实现第一方面的第十二种可能实现的方式至第一方面的第十五种可能实现的方式，并可以达到相同的技术效果，为简洁描述，在这里不再赘述。
第六方面，本发明实施例提供一种基站，该基站包括：
发送器510，用于向终端设备发送第一消息。
第一消息用于指示传输方式信息、传输时长类型中的至少一个。
实现了基站通过第一消息灵活配置不同的传输方法信息，即下行传输时长结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用。同时，提高了下行调度的灵活性和适用性。
结合第六方面，在第六方面的第一种可能实现的方式中，发送器向终端设备发送传输方式信息的标识，传输方式信息的标识用于指示传输方式信息。
结合第六方面的第一种可能实现的方式，在第六方面的第二种可能实现的方式中，发送器，还用于向终端设备发送第二消息，第二消息用于指示第一下行控制信息DCI的资源信息的第一指示信息。
在一个设计方案中，第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
在一个设计方案中，第二指示信息具有实现第二方面的第六种可能实现的方式以及第二方面的第七种可能实现的方式的指示功能，以及第三方面中第二指示信息所实现的指示功能，且可以达到相同的技术效果，为简洁描述，在这里不再赘述。
可选地，第一指示信息具有实现第二方面的第八种可能实现的方式指示功能，且可以达到相同的技术效果，为简洁描述，在这里不再赘述。
在一个设计方案中，第二消息还包括第一PDCCH的符号数的第三指示信息，实现了第一PDCCH的符号数的灵活配置。
在一个设计方案中，基站还包括处理器，处理器还具有实现第二方面的第九种至第十一种可能实现方式的功能，为简洁描述，在这里不再赘述。
本发明实施例相对现有技术还提出了第一下行物理控制信道DCI级别的指示方法。
在一个设计方案中，第一消息还包括第一下行控制信息DCI级别的第四指示信息。
此外，基站还可以实现第二方面的第十五种可能实现的方式至第二十种可能实现的方式，并可以达到相同的技术效果，为简洁描述，在这里不再赘述。
采用本发明实施例提供的物理下行控制信道的传输方法、终端设备和基站，基站向终端设备发送第一消息；采用本发明实施例提供的物理下行控制信道的传输方法，基站配置传输时长信息，并向终端设备发送第一消息，指示用户确定接收第一下行控制信息DCI的资源信息，以便于终端设备确定接 收第一DCI的资源信息，并根据第一DCI的资源信息接收第一DCI，实现了灵活配置不同的传输方式信息，即下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
附图说明
图1为现有技术中FDD帧结构示意图；
图2为本发明实施例提供的一种***架构示意图；
图3为本发明实施例提供的一种物理下行控制信道的传输方法流程图；
图4为本发明实施例提供的一种PDCCH的符号数为1时，下行传输时长结构与发送sPDCCH资源信息的示意图；
图5为本发明实施例提供的另一种PDCCH的符号数为2时，下行传输时长结构与发送sPDCCH资源信息的示意图；
图6为本发明实施例提供的又一种PDCCH的符号数为3时，下行传输时长结构与发送sPDCCH资源信息的示意图
图7为本发明实施例提供的另一种物理下行控制信道的传输方法流程图；
图8为本发明实施例提供的又一种物理下行控制信道的传输方法流程图；
图9为本发明实施例提供的一种基站的结构示意图；
图10为本发明实施例提供的一种终端设备的结构示意图；
图11为本发明实施例提供的另一种基站的结构示意图；
图12为本发明实施例提供的另一种终端设备的结构示意图。
具体实施方式
在3GPP RAN第72次会议中不仅确定了下行传输时长，即短TTI的长度可以配置为2个OFDM符号或者7个OFDM符号。而且在短TTI中，下行控制信道PDCCH仍然存在，子帧中除PDCCH占用的符号数之外的符号数用于 短TTI业务。因为PDCCH占用的符号数为1、2、3时，对下行短TTI的结构有影响，所以提出本发明的技术方案。
需要说明的是，在本发明实施例中，为表述方便，将短TTI(short TTI)，简写为sTTI，或称为传输时长。
还需要说明的是下文中的sTTI均指的是下行sTTI。在sTTI中，sTTI的物理下行控制信道为第一物理下行控制信道PDCCH，简写sPDCCH，下行控制信息为第一下行控制信息，简写为sDCI。传统的物理下行控制信道为第二物理下行控制信道PDCCH，简写为PDCCH，传统的下行控制信息简写为DCI；在本发明实施例中，提到的PDCCH的符号数为PDCCH的占用符号数。
本发明实施例提供一种物理下行控制信道的传输方法、终端设备和基站，本发明实施例可以应用于有基站的蜂窝网络链路，或称为“***”中，如图2所示，在该***中可以包括一个或者多个终端设备，基站(Evolved Node B，eNodeB)。
在本发明实施例中，终端设备(terminal equipment)可称之为终端(terminal)，也可以是用户设备(user equipment，UE)、移动台(mobile station，MS)，移动终端(mobile terminal)，笔记本电脑等，该终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，例如，终端设备可以是移动电话(或称为“蜂窝”电话)或具有移动终端的计算机等，例如，终端设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语音和/或数据。
在本发明实施例中，基站需要根据PDCCH不同的符号数，配置下行sTTI结构，或者说，为PDCCH不同的符号数配置不同的传输时长信息。传输时长信息可以包括传输时长sTTI类型或传输时长的传输方式信息(sTTI的传输pattern)中的至少一个。
其中，sTTI类型为每个传输时长sTTI为几个OFDM符号，例如sTTI为2个OFDM符号，sTTI为4个OFDM符号或sTTI为7个OFDM符号，等等。 传输方式信息为下行sTTI结构中，依sTTI为单位，下行sTTI结构中每个sTTI的OFDM符号数，例如下行sTTI结构中，sTTI0为3个OFDM符号，sTTI1为2个OFDM符号，sTTI为2个OFDM符号，sTTI4为2个OFDM符号，sTTI5为2个OFDM符号，sTTI6为3个OFDM符号，则传输方式信息为322223。
在本发明实施中，基站还需要根据PDCCH不同的符号数配置的下行sTTI结构配置发送物理下行控制信道sPDCCH以及下行数据信息sDCI的资源信息。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
图3为本发明实施例提供的一种物理下行控制信道的传输方法流程图。如图3所示，该方法100可以包括：
S110，基站向终端设备发送第一消息。
第一消息用于指示终端设备确定传输方式信息、传输时长类型中的至少一个，以便于终端设备根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息。其中，第一下行控制信息DCI为在sTTI中，第一物理下行控制信道PDCCH承载的下行控制信息，即sPDCCH承载的下行控制信息，简称为sDCI。
可选地，在一个实施例中，基站向终端设备发送传输方式信息的标识，以便于终端设备根据传输方式信息的标识确定第一DCI的资源信息。
其中，传输方式信息为传输时长信息中的一种，或者说传输时长信息包括传输方式信息。在本发明实施例中，传输时长信息可以包括传输类型或传输方式信息中的至少一个。其中，传输时长类型为传输时长sTTI的长度，例如传输时长sTTI为2个OFDM符号、4个OFDM符号或者7个OFDM符号等。传输方式信息为在sTTI结构中，每个传输时长sTTI的长度，例如一个子帧内传输时长的传输方式信息为322,223，……，表示sTTI0为3个OFDM符号，sTTI1为2个OFDM符号，sTTI2为2个OFDM符号，sTTI3为2个OFDM符号，sTTI4为2个OFDM符号，sTTI5为3个OFDM符号，……。
在本发明实施例中，需要在基站和终端设备预配置或预定义传输方式信息，即传输方式信息与标识的对应关系，以便于终端设备接收到基站发送的传输时长的标识时，根据传输方式的标识确定接收下行sTTI结构，即基站向终端设备发送下行控制信息采用的传输方式信息。
可选地，在本发明的另一个实施例中，基站向终端设备发送的第一消息，还可以包括：
基站通过物理控制格式指示信道(Physical Control Format Indicator Channel，PCFICH)，向终端设备发送第二物理下行控制信道PDCCH的符号数。
第二物理下行控制信道PDCCH为sTTI中定义的现有的PDCCH，即传统的PDCCH。
在本发明实施例中需要为终端设备预配置或预定义PDCCH的符号数与下行sTTI结构的对应关系，以便于终端设备接收到基站发送的PDCCH的符号数时，可以根据PDCCH的符号数确定下行sTTI结构。
可选地，在本发明的另一个实施例中，基站向终端设备发送的第一消息还可以为传输时长信息。
在本发明实施例中，基站还需要向终端设备发送的第二消息，其中，第二消息可以包括第一DCI的资源信息的第一指示信息。资源信息可以包括时域位置、频域位置或者时频域位置。
在本发明实施例中，当终端设备接收到基站发送的传输时长信息时，根据传输时长信息中的sTTI类型或传输方式信息确定下行sTTI结构，并根据接收到的基站发送第一DCI的资源信息的指示信息，确定接收第一DCI的资源信息。
S120，终端设备根据第一消息确定传输方式信息、传输时长类型中的至少一个。
在本发明实施例中，若终端设备接收到的第一消息为传输方式信息的标 识，则终端设备根据传输方式的标识确定传输方式信息，即下行sTTI。
若终端设备接收到的第一消息为基站通过PCFICH发送的PDCCH的符号数，则终端设备根据PDCCH的符号数确定传输方式信息、传输时长类型中的至少一个。
S130，终端设备根据传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息。
终端设备根据传输方式信息、传输时长类型中的至少一个确定接收sDCI的资源信息，以便于终端设备在确定的资源信息上接收sDCI。
需要说明的是，在本发明实施例的前两种方式中，需要为终端设备预配置或预定义传输方式信息、传输时长类型与sDCI的资源信息的对应关系，以便于终端设备根据传输方式信息、传输时长类型中的至少一个确定sDCI的资源信息。
采用本发明实施例提供的物理下行控制信道的传输方法，基站配置传输时长信息，并向终端设备发送包括传输方式信息的标识或PDCCH的符号数的第一消息，以便于终端设备根据第一消息确定传输方式信息、传输时长类型，进一步根据传输方式信息、传输时长类型中的至少一个确定接收第一DCI的资源信息，并根据第一DCI的资源信息接收第一DCI。实现了灵活配置不同的传输方式信息，即下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
可选地，第一消息包括传输方式信息的标识；终端设备根据所述传输方式信息的标识确定传输方式信息。
在本发明实施例中，传输时长类型和/或传输时长的传输方式信息中的至少一个，可以统称为传输时长信息需要说明的是，在本发明实施例中，基站会根据信道质量等信息确定PDCCH使用的聚合等级，相应的确定PDCCH的 符号数。基站根据PDCCH的符号数确定传输下行控制数据采用的传输方式信息。
若基站确定的传输时长信息中的传输时长类型为固定传输时长sTTI，例如每个传输时长sTTI均为2个OFDM符号，每个传输时长sTTI均为4个OFDM符号或者每个传输时长sTTI均为7个OFDM符号，等等；基站确定的传输时长信息中的传输时长类型也可以为非固定的传输时长sTTI，例如sTTI0为3个OFDM符号，sTTI1为2个OFDM符号，sTTI2为2个OFDM符号，等等。
若基站确定的传输时长信息中的传输时长类型为非固定传输时长sTTI，则基站确定传输方式信息，例如传输方式信息为：322,223，……，表示sTTI0为3个OFDM符号，sTTI1为2个OFDM符号，sTTI2为2个OFDM符号，sTTI3为2个OFDM符号，sTTI4为2个OFDM符号，sTTI5为3个OFDM符号，……。
需要说明的是，在本发明实施例中，基站预先根据PDCCH不同的符号数配置了下行sTTI结构，例如传输时长sTTI类型和传输时长信息等。例如基站配置sTTI类型：当PDCCH的符号数为1时，可以配置传输时长sTTI为2个OFDM符号；PDCCH的符号数为2或3时，可以配置sTTI为7个OFDM符号，等等。
在本发明实施例中，基站可以将sTTI类型配置为固定的传输时长sTTI，例如：每个传输时长sTTI均为2个OFDM符号，或者每个传输时长sTTI均为7个OFDM符号，等等；基站还可以将sTTI类型配置为多种可能的传输时长例如每个传输时长sTTI占用的OFDM符号数的个数不同。若基站将sTTI类型配置为了多种可能的传输时长，则基站还需要配置传输时长的传输方式信息。
另外，基站还为配置的下行sTTI结构配置发送物理下行控制信道sPDCCH的资源信息以及下行数据信息sDCI的资源信息，例如图3至图5所 示。其中，资源信息可以包括时域位置、频域位置或者时频域位置。
图5至图7依下行sTTI类型为2个OFDM符号，PDCCH的符号数分别为1、2、3为例，对基站配置的下行sTTI结构、以及相应的发送sPDCCH的资源信息和sDCI的资源信息进行说明。
图5为PDCCH的符号数为1时，下行sTTI结构与发送sPDCCH资源信息的示意图。
如图5(a)所示，基站可以配置在sTTI0的PDCCH区域，即PDCCH所占用的OFDM符号上发送sDCI，在sTTI其余OFDM符号上发送物理下行共享信道(Physical Downlink Shared Channel，PDSCH)。该PDSCH为sTTI中的物理下行控制信道，可以称为sPDSCH。
在本发明实施例中，基站配置的下行sTTI结构的传输方式信息为322，223，即sTTI0为3个OFDM符号，sTTI1为2个OFDM符号，sTTI2为2个OFDM符号，sTTI3为2个OFDM符号，sTTI4为2个OFDM符号，sTTI5为3个OFDM符号。
如图5(b)所示，基站可以配置在sTTI0除PDCCH占用符号外的第一个OFDM符号上发送sPDCCH，在sTTI0的其余OFDM符号上发送sPDCCH或sPDSCH。换句话讲，sTTI0的第一个OFDM符号为PDCCH，在sTTI0的第二个OFDM符号发送sPDCCH，在第三个OFDM符号发送sPDCCH或sPDSCH。
在本发明实施例中，sDCI可以在PDCCH所占有的OFDM符号上发送，或者sDCI可以在sPDCCH所占有的OFDM符号上发送。换句话讲，sDCI可以在PDCCH所在的时频域位置发送或者sDCI可以在sPDCCH所在的时频域位置发送。
在本发明实施例中，sPDCCH承载的下行控制信息可以包括一级DCI，可以在每个sTTI上发送。sPDCCH承载的下行控制信息也可以包括两级DCI中的slow DCI或fast DCI，两级DCI需要在每个sTTI上都发送一次，用于每个sTTI的调度；承载的信息为每个sTTI上每个终端设备的专有信息。或者 说sPDCCH承载的下行控制信息还可以包括两级DCI中的子帧级别发送的下行控制信息或每个sTTI发送的下行控制信息。
在本发明实施例中，基站配置的下行sTTI结构传输方式信息为322，322，即sTTI0为3个OFDM符号，sTTI1为2个OFDM符号，sTTI2为2个OFDM符号，sTTI3为3个OFDM符号，sTTI4为2个OFDM符号，sTTI5为2个OFDM符号。
图6为PDCCH的符号数为2时，下行sTTI结构与发送sPDCCH资源信息的示意图。
如图6(a)所示，基站可以配置在sTTI0发送sPDSCH，sDCI以及sTTI0的调度信息可以在PDCCH的时频域位置发送。
如图6(b)所示，基站可以配置在sTTI0的第一个OFDM符号发送sPDCCH，在sTTI0的第二OFDM符号发送sPDCCH或sPDSCH。sDCI可以在PDCCH所在的时频域位置发送或者sDCI可以在sPDCCH所在的时频域位置发送。sPDCCH承载的下行控制信息可以包括一级DCI，即在每个sTTI发送的sDCI；和/或两级sDCI：slow DCI和调度sTTI0的数据的fast DCI。
在本发明实施例中，基站配置的下行sTTI结构传输方式信息为223，223，即sTTI0为2个OFDM符号，sTTI1为2个OFDM符号，sTTI2为3个OFDM符号，sTTI3为2个OFDM符号，sTTI4为2个OFDM符号，sTTI5为3个OFDM符号。
图7为PDCCH的符号数为3时，下行sTTI结构与发送sPDCCH资源信息的示意图。
图7(a)所示的基站配置情况与图5(a)基站的配置情况类似、图7(b)所示的基站配置情况与图5(b)基站配置的情况类似，为简洁描述，在这里不再赘述。
在本发明实施例中，基站配置的下行sTTI结构传输方式信息为322，223，即sTTI0为3个OFDM符号，sTTI1为2个OFDM符号，sTTI2为2个OFDM 符号，sTTI3为2个OFDM符号，sTTI4为2个OFDM符号，sTTI5为3个OFDM符号。
需要说明的是，图5至图7基站配置的下行sTTI结构与发送sPDCCH资源信息仅仅是说明基站配置下行sTTI结构与发送sPDCCH资源信息的方法，并不是基站配置下行sTTI结构与发送sPDCCH资源信息的所有实施例，在本发明实施例中，基站还可以配置其他的下行sTTI结构与发送sPDCCH资源信息，在本发明实施例中对此配置的具体形式不作限制。
还需要说明的是，在图5至图7中是依sTTI类型为2个OFDM符号时，对本发明的技术方案进行说明，在本发明实施例中，基站还可以依sTTI为7个OFDM符号配置下行sTTI结构与发送sPDCCH资源信息与sDCI的资源信息，在本发明实施例中，对传输时长sTTI类型为几个OFDM符号不作限制。
采用本发明实施例提供的物理下行控制信道的传输方法，实现了根据不同PDCCH的符号数灵活配置不同下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于sTTI为2个OFDM符号或者7个OFDM符号时下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
图4为本发明实施例提供的一种物理下行控制信道的传输方法流程图。如图4所示，该方法100可以包括：
S140，基站向终端设备发送第二消息，所述第二消息包括第一下行控制信息DCI的资源信息的第一指示信息。
第一下行控制信息DCI为下行sTTI中传输的下行控制信息，可以称为sDCI。第一指示信息用于指示发送sDCI的时域位置、频域位置或时频域位置。
S150，终端设备根据传输方式信息、传输时长类型中的至少一个和第二消息确定接收第一DCI的资源信息。
终端设备根据传输方式信息、传输时长类型中的至少一个和第二消息中包括发送sDCI的资源信息的指示信息，确定终端设备接收sDCI的时域和/或 频域位置，以便于终端设备在发送sDCI的时域和/或频域位置上接收sDCI。
需要说明的是，在本发明实施例中，终端设备根据第一消息确定传输方式信息、传输时长类型中至少一个，即S120与终端从基站接收第二消息，即S140不分先后顺序，可以根据实际逻辑实现，在本发明实施例中对此不作限制。
采用本发明实施例提供的物理下行控制信道的传输方法，基站根据PDCCH符号数配置传输时长信息，并向终端设备发送传输时长信息的指示信息和包括发送第一下行控制信息DCI的资源信息的第一指示信息的第二消息，以便于终端设备，根据传输时长信息和第二消息确定接收第一DCI的资源信息，并根据第一DCI的资源信息接收第一DCI，实现了灵活配置不同的下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
在本发明实施例中，基站可以根据PDCCH的不同符号数配置传输时长信息，可以配置传输时长类型或传输方式信息等信息。
若基站根据PDCCH的符号数确定的传输时长信息中的传输时长类型为固定传输时长sTTI，则基站向终端设备发送的传输时长信息可以包括传输时长类型或传输时长信息。
若基站根据PDCCH的符号数确定的传输时长信息中的传输时长类型为非固定传输时长sTTI，则基站向终端设备发送的传输时长信息需要包括传输时长类型和传输方式信息。
可选地，第二消息中还可以包括第一物理下行控制信道PDCCH的资源信息的指示信息。
第一物理下行控制信道PDCCH为sPDCCH。第二指示信息用于指示终端设备发送sPDCCH的时域位置、频域位置或时频域位置。
可选地，第二指示信息可以包括：指示在第二物理下行控制信道PDCCH 后的第一个传输时长所占有的OFDM符号中，除第二PDCCH所占用的OFDM符号之外的OFDM符号上发送第一PDCCH；或者，指示在每个传输时长的起始OFDM符号上发送第一PDCCH。
换句话讲，只在包括PDCCH的第一个sTTI的剩余OFDM符号上发送sPDCCH，如图5(b)所示，在包括PDCCH的sTTI0的第2个OFDM符号上发送sPDCCH，需要说明的是，也可能在sTTI0的第3个OFDM符号上发送sPDCCH。在其余sTTI中，可以在第一个OFDM符号上发送sPDCCH。
或者，指示在传输方式信息的公共OFDM符号上发送第一PDCCH。
公共OFDM符号为，如图5(a)和图5(b)所示，传输时长sTTI4均占用了第二个时隙的第4个OFDM符号，则第二个时隙的第4个OFDM符号为传输方式信息的公共OFDM符号。
可选地，作为本发明的一个实施例，第一指示信息可以用于指示在终端设备在第二物理下行控制信道PDCCH的资源信息上接收第一DCI；或者，用于指示终端设备在第一PDCCH的资源信息上接收第一DCI。
换句话讲，第一指示信息指示在PDCCH的时域位置、频域位置或者时频域位置发送sDCI；或者，指示在sPDCCH的时域位置、频域位置或者时频域位置发送sDCI。
在本发明实施例中还给出了下行sTTI结构发送sPDCCH的资源信息和发送sDCI的资源信息的指示方式。需要说明的是，在本发明实施例中给出的发送sPDCCH和sDCI的资源信息仅仅是为了说明本发明技术方案，在本发明实施例中，对此不作限制。
在本发明的技术方案中，相对现有技术还给出了sPDCCH的符号数的指示方法，具体如下：
可选地，第二消息还可以包括第一PDCCH的符号数的第三指示信息。
第三指示信息用于指示在sTTI中，sPDCCH的符号数。
在本发明实施例中，可选地，基站可以根据为每个子帧内包括的终端设备分配的带宽确定第一PDCCH的符号数；或者，基站可以根据第一下行控制信息DCI级别信息确定第一PDCCH的符号数。
具体的，基站需要预先配置终端设备的带宽阈值，以及带宽阈值与sPDCCH的符号的关系，和/或sDCI级别与sPDCCH符号数的关系。当为终端设备配置的带宽达到预设阈值时，根据预设阈值确定sPDCCH的符号数。第一PDCCH在本发明实施例中，基站可以根据sDCI级别的信息确定sPDCCH的符号数，例如：基站预先配置sDCI的级别为两级sDCI时，sPDCCH的符号数为1个OFDM符号。那么基站确定sDCI是否为两级sDCI，若是两级sDCI时，则确定sPDCCH的符号数为1个OFDM符号。
需要说明的是，在本发明实施例中，基站还可以配置sDCI为两级sDCI时，sPDCCH的符号数为2个OFDM符号，在本发明实施例中对此不作限制。
可选地，第三指示消息用于指示终端设备在短物理控制格式指示信道sPCFICH上接收第一PDCCH的符号数。
或者说，基站可以在短物理控制格式指示信道sPCFICH上发送第一PDCCH的符号数信息。其中，sPCFICH为短TTI中的物理控制格式指示信道，与现有技术中PCFICH的作用相同，第一PDCCH的符号数信息需要在每个短TTI的sPCFICH上发送。换句话讲，终端设备接收基站通过sPCFICH发送的sPDCCH的符号数信息。
采用本发明实施例提供的物理下行传输信道的传输方法，节省了资源。
可选地，在一个实施例中，基站还可也将sPSCCH的符号数配置为固定的符号数。
比如：基站可以配置传输时长sTTI为2个OFDM符号的sPDCCH的符号数为1个OFDM符号。传输时长sTTI为7个OFDM符号的sPDCCH的符号数为1个OFDM符号或者2个OFDM符号。
若sPDCCH的符号数为固定符号数，则基站可以通过信令指示的方式，即向终端设备发送第二消息，第二消息为信令。该第二消息可以为无线资源控制(Radio Resource Control，RRC)信令或***信息块(System Information Blocks，SIB)信令。
在一个实施例中，当sPDCCH的符号数为固定符号数时，在该sTTI内不能重配置或者更改该sPDCCH的符号数。
采用本发明实施例提供的物理下行控制信道的传输方法可以节省资源，同时通过信令，即第二消息可以灵活指示第一PDCCH的符号数。
在另一个实施例中，当sPDCCH的符号数为固定符号数，可以通过物理信令或者高层信令，例如RRC信令、下行控制信息或者SIB信令来指示所需要的sPDCCH符号数。
可选地，如图8所示，作为本发明的另一实施例，该方法100还可以包括：
S160，基站向终端设备发送的第三消息，第三消息用于指示重配置第一PDCCH的符号数。
S170，终端设备根据第一消息和第二消息确定第一DCI的资源信息，以及根据第三消息确定第一PDCCH的符号数。
终端设备接收基站发送第三消息，并根据第三消息确定sPDCCH的符号数。第三消息可以为RRC信令或者SIB信令。终端设备接收到基站发送的第三消息后，根据第三消息确定sPDCCH的符号数。
采用本发明实施例提供的方案，通过信令的方式，灵活配置sPDCCH的符号数。
需要说明的是，在本发明实施例中，也有可能sPDCCH的符号数不是固定符号数时，基站也可以通过向终端设备发送第三消息，指示终端设备重新配置了sPDCCH的符号数。
应理解，在本发明实施例中，还可以将sPDCCH的符号数写在协议中， 此时，若存在sPDCCH，且sPDCCH的符号数，则不需要基站向终端设备发送指示信息指示sPDCCH的符号数。
可选地，第三指示信息还可以用于指示在终端设备第二PDCCH的资源信息上接收第一PDCCH的符号数；或者，用于指示终端设备在第一PDCCH的资源信息上接收第一PDCCH的符号数。
基站可以配置在sPDCCH的符号数在PDCCH或sPDCCH的时域位置、频域位置或者时频域位置发送。
例如：对于子帧的第一个时隙：
若存在sPDCCH，且为一级sDCI，则基站配置在PDCCH上发送sPDCCH的符号数；若为两级sDCI，则基站配置由两级DCI的子帧级别的DCI来指示两级sDCI所在的sPDCCH的符号数。
又如：对于子帧的第二个时隙：
基站可以配置通过第一个时隙的一级sDCI或者两级sDCI指示sPDCCH的符号数。其中，一级sDCI可以在PDCCH的资源信息或者sPDCCH的资源信息发送。
或者，在第二个时隙的第一个OFDM符号上发送sPDCCH的符号数。
基站确定了sPDCCH的符号数后，向终端设备发送包括sPDCCH的符号数的第三指示信息。
本发明实施例提供的物理下行控制信道的传输方法，相对现有技术还提出了sDCI级别的指示方法，具体如下：
可选地，第二消息还可以包括第一下行控制信息DCI级别的第四指示信息。
在终端设备接收基站发送的第四指示信息之前，或者说基站向终端设备发送第四信息之前，基站需要确定第一DCI级别，即sDCI级别的信息。
可选地，基站可以通过传输模式确定第一DCI级别的信息。
例如基站可以将sDCI级别与目前协议中的传输模式(transfer mode，TM)进行关联，配置TM1、TM2、TM3、TM4、TM6、TM9、TM10可以用于sTTI帧结构类型1；或者，配置TM1、TM2、TM3、TM4、TM6、TM8、TM9、TM10可以用于sTTI帧结构类型2。
基站根据不同的传输模式确定不同的sDCI级别，并通过指示信息指示给终端设备。
可选地，在另一个实施例中，基站还可以根据传输时长的资源信息确定第一DCI级别信息，其中，传输时长的资源信息可以包括预配置的传输时长的时频资源或者预先为传输时长配置的特定时频资源区域，也可以称为资源池。
例如：基站指定在时频资源或者资源池内，基站只会发送两级sDCI，并通过指示信息指示给终端设备，终端设备则只需要在该时频资源或资源池检测两级sDCI。
或者，基站在时频资源或者资源池内，基站只会发送一级sDCI，并通过指示信息指示给终端设备，终端设备则只需要在该时频资源或资源池检测一级sDCI。
另外，基站可以配置sDCI级别信息在PDCCH的资源信息上发送。
例如：若PCCH中包括sDCI，则在sDCI中指示某个终端设备是一级DCI还是两级DCI。
若PDCCH中不包括sDCI，则在sDCI中指示子帧中终端设备是一级DCI或者两级DCI。
可选地，作为本发明的另一实施例，第四指示信息可以用于指示终端设备在第二PDCCH的资源信息上接收第一DCI级别的信息。
换句话讲，基站向终端设备发送在PDCCH的时域位置、频域位置或时 频域位置上发送的sDIC级别的第四指示信息。终端设备接收基站发送的第四指示信息，并根据第四指示信息确定要接收的sDCI的级别。
可选地，如图9所示，该方法100还可以包括：
S180，基站向终端设备发送的第四消息。
第四消息用于指示终端设备接收第一下行控制信息DCI的级别，第四消息包括第一下行控制信息DCI级别的第五指示信息。
S190，终端设备根据第一消息和第二消息确定第一DCI的资源信息，并根据第四消息确定发送的第一DCI的级别。
基站可以直接配置sDCI级别。例如通过RRC信令或者SIB信令中的至少一个。
终端设备接收到基站发送的sDCI级别的指示信息后，根据指示信息确定需要接收的sDCI级别为一级sDCI还是两级sDCI，并根据确定的sDCI级别，接收相应级别的sDCI。
上文中结合图3至图9，详细描述了根据本发明实施例的物理下行控制信道的传输方法，下面将结合图10至图13，详细描述根据本发明实施例的终端设备和基站。
在这里再次说明一下，下面图10至图13中提到的第二物理下行控制信道PDCCH为现有或者传统的物理下行控制信道，简写为PDCCH。第一物理下行控制信道PDCCH为sTTI中的物理下行控制信道，简写为sPDCCH。第一下行控制信息DCI为sTTI中的下行控制信息，简写为sDCI。
图10为本发明实施例提供的一种基站。如图10所示，该基站300可以包括发送单元310。
发送单元310，用于向终端设备发送第一消息。
第一消息用于指示传输方式信息、传输时长类型中的至少一个。
可选地，在本发明实施例中，第一消息可以为传输方式信息的标识， 以便于终端设备接收到基站发送的传输方式信息的标识时，根据传输时长信息的标识确定第一DCI的资源信息。
其中，传输方式信息为传输时长信息中的一个。传输时长信息可以包括传输方式信息或传输时长sTTI类型中的至少一个。
可选地，第一消息可以为基站通过物理控制格式指示信道PCFICH向终端设备发送第二物理下行控制信道PDCCH的符号数。其中，第二PDCCH的符号数用于终端设备确定传输方式信息、传输时长类型中的至少一个，进一步确定接收第一DCI的资源信息。
具体描述请参见图3提供的物理下行控制信道的传输方法100中的S110的描述，为简洁描述，在这里不再赘述。
在本发明实施例中，基站需要预先根据PDCCH的不同符号数配置不同的下行sTTI结构，该下行sTTI结构包括传输时长sTTI类型和传输方式信息等信息，并为配置的下行sTTI结构配置发送sPDCCH的资源信息以及发送sDCI的资源信息，其中资源信息包括时域位置、频域位置或时频域位置。
在基站根据信道质量等信息确定了PDCCH的符号数后，确定所要采用的发送下行控制信息的下行sTTI结构，即sTTI类型或传输方式信息中的至少一个信息，并将确定的下行sTTI结构以及该下行sTTI结构所对应的发送sPDCCH的资源信息以及发送sDCI的资源信息的指示信息发送给终端设备，以便于终端设备接收到基站发送的下行sTTI结构和发送sDCI的资源信息的指示信息，确定在哪些资源信息上接收sDCI。
通过本发明是实施例提供的基站，基站配置传输时长信息，并向终端设备发送传输方式信息的指示信息，即传输方式的标识或PDCCH的符号数；或者，发送传输时长信息和第一下行控制信息DCI的资源信息的第一指示信息，以便于终端设备UE确定接收第一DCI的资源信息，并根据第一DCI的资源 信息接收第一DCI。
该传输时长类型以及传输方式信息的具体描述请参见物理下行控制信道的传输方法100中传输时长类型和传输方式信息的描述，为简洁描述在这里不再赘述。
可选地，第二消息还可以包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
可选地，第二指示信息可以包括指示终端设备在第二物理下行控制信道PDCCH后的第一个传输时长所占有的OFDM符号中，除第二PDCCH所占用的OFDM符号之外的OFDM符号上接收第一PDCCH；或者，指示终端设备在每个传输时长的起始OFDM符号上接收第一PDCCH；或者，指示终端设备在传输方式信息的公共OFDM符号上接收所述第一PDCCH。
该实施例的具体描述请参见实施例物理下行控制信道的传输方法中第二指示信息指示发送第一PDCCH，即发送sPDCCH的方式描述过程，为简洁描述，在这里不再赘述。
需要说明的是，实施例物理下行控制信道传输方法中第二指示信息指示发送sPDCCH的方式只是本发明实施例提供的一种或者几种具体实现方式，在物理下行控制信道的传输方法实施例中，基站还可以配置发送sPDCCH的其他的方式，在物理下行控制信道的传输方法实施例中对此不作限制，由于本发明实施例是与物理下行控制信道的传输方法实施例属于同一个发明构思，所以，在本发明实施例中，对指示发送sPDCCH的方式也不作限制。
可选地，作为本发明的一个实施例，第一指示信息可以用于指示终端设备在第二PDCCH的资源信息上接收第一DCI；或者，用于指示终端设备第一PDCCH的资源信息上接收第一DCI。
可选地，第二消息还包括第一PDCCH的符号数的第三指示信息，以便于终端设备接收到基站发送的包括第一PDCCH的符号数的指示信息， 确定接收第一PDCCH的符号数。
可选地，作为本发明另实施例，如图9所示，该基站300还包括处理单元320。
处理单元320，用于根据为每个子帧内包括的终端设备分配的带宽确定第一PDCCH的符号数。
在本发明实施例中，基站需要预先配置带宽的阈值，以及带宽阈值所对应采用的第一PDCCH的符号数。
当处理单元320确定为终端设备分配的带宽超过预设阈值时，确定第一PDCCH的符号数。
可选地，作为本发明另实施例，处理单元320还用于：
根据第一下行控制信息DCI级别信息确定第一PDCCH的符号数。
基站需要预先配置第一DCI级别对应的第一PDCCH的符号数，以便于处理单元根据第一DCI的级别确定所要采用的第一PDCCH的符号数。
可选地，作为本发明的一个实施例，第一PDCCH的符号数可以为固定符号数。
例如：基站可以设置sTTI为2个OFDM符号的sPDCCH的符号数为1个OFDM符号。传输时长sTTI为7个OFDM符号的sPDCCH的符号数为1个OFDM符号或者2个OFDM符号。
在本发明实施例中，基站可以通过信令指示的方式通知终端设备sPDCCH的符号数。
可选地，第三指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一PDCCH的符号数；或者，指示终端设备在第一PDCCH的资源信息上接收第一PDCCH的符号数。
可选地，发送单元310，还用于,
向终端设备发送第三消息，该第三消息用于指示重配置第一PDCCH的符号数。
第三消息可以为物理层信令或高层信令，例如RRC信令或SIB信令。当sPDCCH的符号数为固定符号数时，基站可以向终端设备发送第三消息，以指示终端设备基站重配置的sPDCCH的符号数。
需要说明的是，在本发明实施例中，也有可能sPDCCH的符号数不是固定符号数时，基站也可以通过向终端设备发送第二消息，指示终端设备重新配置了sPDCCH的符号数。
可选地，第二消息还可以包括第一下行控制信息DCI级别的第四指示信息。
可选地，处理单元320还用于：
确定第一DCI级别的信息。
可选地，处理单元320根据传输模式确定所述第一DCI级别的信息。
在本发明实施例中，基站可以将sDCI级别与传输模式相关联，配置不同的传输模式发送不同sDCI级别的sDCI，以便于处理单元320根据传输模式确定sDCI级别的信息。
可选地，处理单元320
根据传输时长的资源信息确定第一DCI级别的信息；其中，传输时长的资源信息包括预配置的传输时长的时频资源信息。具体描述可以参见物理下行控制信道的传输方法中根据传输时长的资源信息确定第一DCI级别信息的描述过程，为简洁描述，在这里不再赘述。
可选地，第四指示信息，包括：
指示终端设备在第二PDCCH的资源信息上接收第一DCI级别的信息。
可选地，发送单元310还用于：
向终端设备发送第四消息，该第四消息用于指示终端设备接收第一下行控制信息DCI的级别，第四消息包括第一下行控制信息DCI级别的第五指示信息。
在本发明实施例中，基站的发送单元310可以直接通过物理层信令或 高层信令，例如RRC信令或SIB信令中的至少一个指示终端设备发送sDCI的sDCI级别。在本发明实施例中，可以不将sDCI级别的指示信息通过第二消息的方式指示给终端设备。
需要说明的是，本发明实施例提供的基站300可以完成图3至图9提供的物理下行控制信道的传输方法200中基站所执行的方法/步骤S210、S220、S240和S250，也可以达到图3至图9中各个方案所达到的技术效果，为简洁描述，在这里不再赘述。
还需要说明的是，在本发明实施例中，发送单元可以为发送器，处理单元可以为处理器。
图11为本发明实施例提供的一种终端设备。如图11所示，该终端设备400可以包括接收单元410和处理单元420。
接收单元410，用于从基站接收第一消息。
处理单元420，用于根据第一消息确定传输时长信息、传输时长类型中的至少一个。
处理单元420，用于根据传输时长信息、传输时长类型中的至少一个确定第一DCI的资源信息。
接收单元410，还用于根据第一DCI的资源信息接收第一DCI。
可选地，在本发明另一实施例，接收单元410接收基站发送的第一消息，可以包括：接收基站发送的传输方式信息的标识。
处理单元420根据根据所述传输方式信息的标识确定所述传输方式信息；根据所述传输方式信息确定所述第一DCI的资源信息。
在本发明实施例中传输方式信息和/或传输时长类型可以统称为传输时长信息。
可选地，在本发明实施例中，第一消息包括第二物理下行控制信道PDCCH的符号数。
接收单元410接收基站通过物理控制格式指示信道PCFICH发送的第二物理下行控制信道PDCCH的符号数。
处理单元420根据第二PDCCH的符号数确定传输方式信息、传输时长类型中的至少一个；根据传输方式信息、传输时长类型中的至少一个确定所述第一DCI的资源信息。
可选地，在本发明实施例中，
接收单元410，还用于接收基站发送的第二消息，第二消息包括第一DCI的资源信息的第一指示信息。
处理单元420根据传输方式信息、传输时长类型中的至少一个和所述第一消息确定第一DCI的资源信息。
通过本发明实施例提供的终端设备，通过预先根据PDCCH不同的符号数配置下行sTTI结构，并配置下行sTTI结构发送sPDCCH的资源信息以及发送sDCI的资源信息，通过指示的方法，通知给终端设备，以便于终端设备接收sDCI。实现了根据不同PDCCH的符号数灵活配置不同的下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
该传输时长类型以及传输方式信息的具体描述请参见物理下行控制信道的传输方法100中传输时长类型和传输方式信息的描述，为简洁描述在这里不再赘述。
可选地，作为本发明的一个实施例，第二消息还包括：
第一物理下行控制信道PDCCH的资源信息的第二指示信息。
可选地，作为本发明的一个实施例，第二指示信息用于指示终端设备在第二物理下行控制信道PDCCH后的第一个传输时长所占有的OFDM符号中，除第二PDCCH所占用的OFDM符号之外的OFDM符号上接收第一PDCCH；或者，指示终端设备在每个传输时长的起始OFDM符号上接收第一PDCCH；或者，指示终端设备在传输方式信息的公共OFDM符号上 接收第一PDCCH。
该实施例的具体描述请参见实施例物理下行控制信道的传输方法中第二指示信息指示sPDCCH的方式的描述过程，为简洁描述，在这里不再赘述。
可选地，作为本发明的一个实施例，第一指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一DCI；或者，用于指示终端设备在第一PDCCH的资源信息上接收第一DCI。
可选地，作为本发明的一个实施例，第二消息还包括第一PDCCH的符号数的第三指示信息。
可选地，作为本发明的一个实施例，第一PDCCH的符号数为固定符号数。
可选地，作为本发明的一个实施例，第三指示信息用于指示终端设备在第二PDCCH的资源信息上接收第一PDCCH的符号数；或者，用于指示终端设备在第一PDCCH的资源信息上接收第一PDCCH的符号数。
可选地，作为本发明的一个实施例，接收单元410还用于：
接收基站发送的第三消息，第三消息用于指示重配置第一PDCCH的符号数。
可选地，作为本发明的一个实施例，第二消息还可以包括第一下行控制信息DCI级别的第四指示信息。
可选地，作为本发明的一个实施例，第四指示信息可以用于指示终端设备在第二PDCCH的资源信息上接收第一DCI级别的信息。
可选地，作为本发明的一个实施例，接收单元310还用于：
接收基站发送的第四消息，第四消息用于指示第一下行控制信息DCI的级别，第四消息包括第一下行控制信息DCI级别的第五指示信息。
可选地，作为本发明的一个实施例，第三消息或者第四消息包括物理层信令或者高层信令中至少一个。物理层信令或者高层信令可以为RRC信 令、SIB信令或下行控制信息中的至少一个。
需要说明的是，本发明实施例提供的终端设备400可以完成图3至图9提供的物理下行控制信道的传输方法200中终端设备所执行的方法/步骤，也可以达到图3至图9中各个方案所达到的技术效果，为简洁描述，在这里不再赘述。
需要说明的是，在本发明实施例中，接收单元可以为接收器，处理单元可以为处理器。
图12为本发明实施例提供的一种基站。如图12所示，该基站500可以包括发送器510和处理器520。
发送器510，用于向终端设备发送第一消息。
第一消息用于指示传输方式信息、传输时长类型中的至少一个。
可选地，在本发明实施例中，第一消息可以为传输方式信息的标识，以便于终端设备接收到基站发送的传输方式信息的标识时，根据传输方式信息的标识确定传输方式信息。
其中，传输时长sTTI类型和/或传输方式信息可以统称为传输时长信息。
可选地，第一消息可以为基站通过物理控制格式指示信道PCFICH向终端设备发送第二物理下行控制信道PDCCH的符号数。其中，第二PDCCH的符号数用于终端设备确定发送第一DCI的资源信息。
可选地，第一消息还可以为基站向终端设备发送的传输时长信息。
在本发明实施例中，基站的发送器510还需要向终端设备发送第二消息，第二消息包括第一下行控制信息DCI的资源信息的第一指示信息，以便于终端设备根据传输方式信息、传输时长类型中的至少一个和第一指示信息确定接收第一DCI的资源信息。其中，资源信息可以为时域位置、频域位置或时频域位置。
具体描述请参见图3提供的物理下行控制信道的传输方法100中的S110的描述，为简洁描述，在这里不再赘述。
在本发明实施例中，需要基站预先根据PDCCH不同的符号数配置下行sTTI结构，并配置下行sTTI结构发送sPDCCH的资源信息以及发送sDCI的资源信息，通过指示的方法，通知给终端设备，以便于终端设备接收sDCI。实现了根据不同PDCCH的符号数灵活配置不同的下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
可选地，第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
可选地，第二指示信息用于指示终端设备在第一个传输时长所占有的OFDM符号中，除第二PDCCH所占用的OFDM符号之外的OFDM符号上接收第一PDCCH；或者，用于指示终端设备在每个传输时长的起始OFDM符号上接收第一PDCCH；或者，用于指示在传输方式信息的公共OFDM符号上接收第一PDCCH。
可选地，第一指示信息用于指示
终端设备在第二PDCCH的资源信息上接收第一DCI；或者用于指示终端设备在第一PDCCH的资源信息上接收第一DCI。
可选地，第二消息还包括第一PDCCH的符号数的第三指示信息。
可选地，处理器520还用于：
根据为每个子帧内包括的终端设备分配的带宽确定第一PDCCH的符号数。
可选地，处理器520还用于：
根据第一下行控制信息DCI级别确定第一PDCCH的符号数。
可选地，第一PDCCH的符号数为固定符号数。
可选地，第三指示信息用于指示终端设备在第二PDCCH的资源信息 上接收所述第一PDCCH的符号数；或者，用于指示在第一PDCCH的资源信息上接收第一PDCCH的符号数。
可选地，发送器510，还用于向所述终端设备发送第三消息，第三消息用于指示重配置第一PDCCH的符号数。
可选地，第一消息还包括第一下行控制信息DCI级别的第四指示信息。
可选地，处理器520，还用于确定第一DCI级别的信息。
可选地，处理器520，用于根据传输模式确定第一DCI级别的信息。
可选地，处理器520，用于根据传输时长的资源信息确定第一DCI级别的信息。
其中，传输时长的资源信息包括预配置的传输时长的时频资源信息。
可选地，第四指示信息用于指示终端设备在第二PDCCH的资源信息上发送第一DCI级别的信息。
可选地，发送器510，还用于向终端设备发送第四消息，第四消息用于指示所述终端设备接收第一下行控制信息DCI的级别，第四消息包括第一下行控制信息DCI级别的第五指示信息。
可选地，第三消息或第四消息包括物理层信令或高层信令中至少一个。
需要说明的是，本发明实施例提供的基站500可以完成图3至图9提供的物理下行控制信道的传输方法100中基站所执行的方法/步骤S110、S120、S140、S150，S160、S170、S180和S190，且本发明实施例提供的基站500也可以支持图10提供的基站300完成图3至图9提供的物理下行控制信道的传输方法200中基站所执行的方法/步骤S110、S120、S140、S150，S160、S170、S180和S190，同样可以达到图3至图9中各个方案所达到的技术效果，为简洁描述，在这里不再赘述。
图13为本发明实施例提供的一种终端设备。如图12所示，该终端设备600可以包括接收器610和处理器620。
接收器610，用于从基站接收第一消息。
处理器620，用于根据第一消息确定传输方式信息、传输时长信息中的至少一个。
处理器620，还用于根据传输方式信息、传输时长信息中的至少一个确定第一DCI的资源信息。
在本发明实施例中，传输方式信息和/或传输时长类型可以统称为传输时长信息。
通过本发明是实施例提供的终端设备，基站配置传输时长信息，并向终端设备发送第一消息，以便于终端设备根据第一消息确定传输方式信息、传输时长类型中的至少一个，进一步根据传输方式信息、传输时长类型中的至少一个确定接收第一DCI的资源信息，并根据第一DCI的资源信息接收第一DCI。实现了灵活配置不同的传输方式信息，即下行sTTI结构。同时下行传输时长结构不跨时隙边界，且与上行结构一致，便于下行传输时长结构的复用；同时提高了下行调度的灵活性和适用性。
可选地，第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
可选地，第二指示信息用于指示终端设备在第二PDCCH后的第一个传输时长所占有的OFDM符号中，除第二PDCCH所占用的OFDM符号之外的OFDM符号上接收第一PDCCH；或者，用于指示终端设备在每个传输时长的起始OFDM符号上发送第一PDCCH；或者，用于指示终端设备在传输方式信息的公共OFDM符号上接收第一PDCCH。
可选地，第一指示信息可以用于指示终端设备在第二PDCCH的资源信息上接收第一DCI；或者，用于指示终端设备在第一PDCCH的资源信息上接收第一DCI。
可选地，所述第二消息还可以包括第一PDCCH的符号数的第三指示信息。
可选地，第一PDCCH的符号数可以为固定符号数。
可选地，第三指示信息用于指示终端设备在所述第二PDCCH的资源信息上接收第一PDCCH的符号数；或者，用于指示终端设备在第一PDCCH的资源信息上接收第一PDCCH的符号数。
可选地，接收器610，还用于接收基站发送的第三消息，第三消息用于指示重配置第一PDCCH的符号数。
可选地，第二消息还可以包括第一下行控制信息DCI级别的第四指示信息。
可选地，第四指示信息可以用于指示终端设备在第二PDCCH的资源信息上接收第一DCI级别。
可选地，接收器610还用于：
接收基站发送的第四消息，第四消息用于指示接收第一下行控制信息DCI的级别，第四消息包括第一下行控制信息DCI级别的第五指示信息。
可选地，第二消息或者第三消息可以包括物理层信令或者高层信令中至少一个。
需要说明的是，本发明实施例提供的终端设备600可以完成图3至图9提供的物理下行控制信道的传输方法100和方法200中终端设备所执行的方法/步骤，且本发明实施例提供的终端设备600也可以支持图11提供的终端设备400完成图3至图9提供的物理下行控制信道的传输方法100和200中基站所执行的方法/步骤，同样可以达到图3至图9中各个方案所达到的技术效果，为简洁描述，在这里不再赘述。
应理解，在图12提供的基站500和图13提供的终端设备600中的处理器520/620可以是中央处理单元(Central Processing Unit，CPU)，还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
在实现过程中，上述方法的各步骤可以通过处理器520/620中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器520/620读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
在本发明实施例中，图12提供的基站500可以包括接收器530，接收器530用于接收终端设备或者其他设备发送的消息。图13提供的终端设备600还可以包括接收器630，接收器630用于接收基站与其他设备发送的消息，例如基站向终端设备发送的sDCI的资源信息的指示信息、sPDCCH的符号数的指示信息，等等。
另外，图12提供的基站500可以可以包括存储器540，图13提供的终端设备600可以可以包括存储器640。存储器用于存储指令和数据。
存储器540/640可以包括只读存储器和随机存取存储器，并向处理器520/620提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。
在本发明所提供的几个实施例中，应该理解到，所揭露的基站、终端设备和物理下行控制信道的传输方法，可以通过其它的方式实现。例如，以上所描述的基站和终端设备实施例仅仅是示意性的，例如，该单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。该作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于 一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
该集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例该方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (34)

  1. 一种物理下行控制信道的传输方法，其特征在于，所述方法包括：
    终端设备从基站接收第一消息；
    所述终端设备根据所述第一消息确定传输方式信息、传输时长类型中的至少一个；
    所述终端设备根据所述传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一消息包括所述传输方式信息的标识；
    所述终端设备根据所述传输方式信息的标识确定所述传输方式信息。
  3. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述终端设备从所述基站接收第二消息，所述第二消息包括所述第一DCI的资源信息的第一指示信息。
  4. 根据权利要求3所述的方法，其特征在于，所述终端设备根据所述传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息，包括：
    所述终端设备根据所述传输方式信息、所述传输时长类型中的至少一个和所述第二消息确定所述第一DCI的资源信息。
  5. 根据权利要求3或4所述的方法，其特征在于，所述第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
  6. 根据权利要求5所述的方法，其特征在于，所述第一指示信息用于指示所述终端设备在第二物理下行控制信道PDCCH的资源信息上接收所述第一DCI；或者，所述第一指示信息用于指示所述终端设备在所述第一PDCCH的资源信息上接收所述第一DCI。
  7. 根据权利要求3至6任一项所述的方法，其特征在于，所述第二消息还包括所述第一PDCCH的符号数的第三指示信息。
  8. 根据权利要求3至7任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备从所述基站接收第三消息，所述第三消息用于指示重配置所述第一PDCCH的符号数。
  9. 一种物理下行控制信道的传输方法，其特征在于，所述方法包括：
    基站向终端设备发送第一消息，所述第一消息用于指示传输方式信息、传输时长类型中的至少一个。
  10. 根据权利要求9所述的方法，其特征在于，所述基站向所述终端设备发送传输方式信息的标识，所述传输方式信息的标识用于指示传输方式信息。
  11. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    所述基站向所述终端设备发送第二消息，所述第二消息用于指示第一下行控制信息DCI的资源信息的第一指示信息。
  12. 根据权利要求11所述的方法，其特征在于，所述第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
  13. 根据权利要求12所述的方法，其特征在于，所述第一指示信息用于指示所述终端设备在所述第二物理下行控制信道PDCCH的资源信息上接收所述第一DCI；或者，所述第一指示信息用于指示所述终端设备在所述第一PDCCH的资源信息上接收所述第一DCI。
  14. 根据权利要求11至13任一项所述的方法，其特征在于，所述第二消息还包括所述第一PDCCH的符号数的第三指示信息。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    所述基站根据为每个子帧内包括的终端设备分配的带宽确定所述第一PDCCH的符号数。
  16. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    所述基站根据第一下行控制信息DCI级别信息确定所述第一PDCCH的符号数。
  17. 根据权利要求11至16任一项所述的方法，其特征在于，所述方法还包括：
    所述基站向所述终端设备发送第三消息，所述第三消息用于指示重配置所述第一PDCCH的符号数。
  18. 一种终端设备，其特征在于，所述终端设备包括：
    接收单元，用于从基站接收第一消息；
    处理单元，用于根据所述第一消息确定传输方式信息、传输时长类型中的至少一个；
    所述处理单元，用于根据所述传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息。
  19. 根据权利要求18所述的终端设备，其特征在于，所述第一消息包括所述传输方式信息的标识；
    所述处理单元根据所述传输方式信息的标识确定所述传输方式信息。
  20. 根据权利要求18所述的终端设备，其特征在于，
    所述接收单元，还用于从所述基站接收第二消息，所述第二消息包括所述第一DCI的资源信息的第一指示信息。
  21. 根据权利要求20所述的终端设备，其特征在于，所述处理单元根据所述传输方式信息、传输时长类型中的至少一个确定第一下行控制信息DCI的资源信息，包括：
    所述处理单元根据所述传输方式信息、传输时长类型中的至少一个和所述第二消息确定所述第一DCI的资源信息。
  22. 根据权利要求20或21所述的终端设备，其特征在于，所述第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
  23. 根据权利要求22所述的终端设备，其特征在于，所述第一指示信息用于指示所述终端设备在第二物理下行控制信道PDCCH的资源信息上接收所述第一DCI；或者，所述第一指示用于指示所述终端设备在所述第一PDCCH的资源信息上接收所述第一DCI。
  24. 根据权利要求20至23任一项所述的终端设备，其特征在于，所述第二消息还包括所述第一PDCCH的符号数的第三指示信息。
  25. 根据权利要求20至24任一项所述的终端设备，其特征在于，
    所述接收单元，还用于从所述基站接收第三消息，所述第三消息用于指示重配置所述第一PDCCH的符号数。
  26. 一种基站，其特征在于，所述基站包括：
    发送单元，用于向终端设备发送第一消息，所述第一消息用于指示传输方式信息、传输时长类型中的至少一个。
  27. 根据权利要求26所述的基站，其特征在于，
    所述发送单元向所述终端设备发送传输方式信息的标识，所述传输方式信息的标识用于指示传输方式信息。
  28. 根据权利要求26所述的基站，其特征在于，
    所述发送单元，还用于向所述终端设备发送第二消息，所述第二消息用于指示第一下行控制信息DCI的资源信息的第一指示信息。
  29. 根据权利要求28所述的基站，其特征在于，所述第二消息还包括第一物理下行控制信道PDCCH的资源信息的第二指示信息。
  30. 根据权利要求29所述的基站，其特征在于，所述第一指示信息用于指示所述终端设备在第二物理下行控制信道PDCCH的资源信息上接收所述第一DCI；或者，所述第一指示信息用于指示所述终端设备在所述第一PDCCH的资源信息上接收所述第一DCI。
  31. 根据权利要求28至30任一项所述的基站，其特征在于，所述第 二消息还包括所述第一PDCCH的符号数的第三指示信息。
  32. 根据权利要求31所述的基站，其特征在于，所述基站还包括：
    处理单元，用于根据为每个子帧内包括的终端设备分配的带宽确定所述第一PDCCH的符号数。
  33. 根据权利要求31所述的基站，其特征在于，所述基站还包括：
    处理单元，用于根据第一下行控制信息DCI级别信息确定所述第一PDCCH的符号数。
  34. 根据权利要求28至33任一项所述的基站，其特征在于，所述发送单元，还用于向所述终端设备发送第三消息，所述第三消息用于指示重配置所述第一PDCCH的符号数。
    Figure PCTCN2016104662-appb-100001
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