WO2018058453A1 - 通信方法、终端设备和基站 - Google Patents

通信方法、终端设备和基站 Download PDF

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Publication number
WO2018058453A1
WO2018058453A1 PCT/CN2016/100874 CN2016100874W WO2018058453A1 WO 2018058453 A1 WO2018058453 A1 WO 2018058453A1 CN 2016100874 W CN2016100874 W CN 2016100874W WO 2018058453 A1 WO2018058453 A1 WO 2018058453A1
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WIPO (PCT)
Prior art keywords
indication information
terminal device
communication channel
dci
information
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PCT/CN2016/100874
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English (en)
French (fr)
Inventor
汲桐
铁晓磊
吴毅凌
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201680088447.6A priority Critical patent/CN109565386A/zh
Priority to PCT/CN2016/100874 priority patent/WO2018058453A1/zh
Publication of WO2018058453A1 publication Critical patent/WO2018058453A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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 communication method, a terminal device, and a base station.
  • MTC Machine Type Communication
  • M2M Machine To Machine
  • IoT Intent of Things
  • one type of important IoT communication system is a communication system based on an existing cellular architecture, which can be called a Cellular IoT.
  • a very high data transmission rate is generally not required between MTC base station terminal devices, but the MTC requires a large coverage area. Therefore, there may be a large number of terminal devices under one MTC base station, which may cover various types of terminal devices such as smart water or electricity meters, smart communities, monitoring, automobiles, wearable terminal devices, and the like.
  • This type of terminal device has high requirements on power consumption and cost in communicating with the MTC base station, and thus the capability of the terminal device is often limited.
  • Single Cell Point-to-Multipoint is a multicast-based communication technology.
  • the multicast technology includes two types of logical channels: a Single Cell Multicast Control Channel (SC-MCCH) and a Single Cell Multicast Traffic Channel (SC).
  • SC-MCCH Single Cell Multicast Control Channel
  • SC-MTCH Single Cell Multicast Traffic Channel
  • the SC-MCCH is a control channel for transmitting configuration information required by the terminal device to receive the SC-MTCH (ie, configuration information of the SC-MTCH).
  • the SC-MTCH is a data channel for transmitting service data in multicast. The relevant basic process is shown in Figure 1.
  • the configuration information of the downlink control channel (Physical Downlink Control Channel, hereinafter referred to as "PDCCH") of the SC-MCCH is indicated in the System Information Block ("SIB"); the PDCCH in the SC-MCCH carries the downlink sharing of the SC-MCCH.
  • SIB System Information Block
  • the PDSCH of the SC-MCCH carries the PDCCH configuration information of the SC-MTCH
  • the PDCCH of the SC-MTCH The PDSCH configuration information of the SC-MTCH is carried therein; the PDSCH of the SC-MTCH carries the multicast message content. Therefore, before receiving the configuration information of the SC-MTCH carried by the SC-MCCH or the multicast service data carried by the SC-MTCH, the terminal device needs to acquire configuration information of the DCI for scheduling data carried by the SC-MCCH or the SC-MTCH.
  • the base station may indicate the maximum repetition number R, the period parameter G, and the position offset parameter offset to the UE through the SIB, and the UE determines a search space according to the maximum repetition number R of the DCI, the period factor G, and the position offset parameter offset.
  • the starting position based on the starting position, blindly checks the DCI. For example, as shown in FIG. 2, in a search space, a block can be regarded as a candidate.
  • the UE can blindly check different candidates according to different DCI actual repetition times and DCI start positions until detection. Successful location. If it is not successful, continue to monitor the next DCI cycle. If the scheme is applied to the SC-PTM, the power consumption of the UE will be large.
  • the present invention provides a communication method, a base station, and a terminal device, which can reduce the power consumption of the terminal device to detect DCI.
  • an embodiment of the present application provides a communication method, where the communication method includes:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one starting location of the downlink control information DCI of the communication channel;
  • the terminal device receives the DCI according to the at least one starting location.
  • the terminal device By detecting the DCI according to the starting position of the DCI, the terminal device is prevented from blindly detecting the starting position of the DCI, and the power consumption of the terminal device can be saved.
  • the at least one starting location respectively corresponds to multicast information with different coverage requirements.
  • the starting position of the DCI corresponding to the multicast information having different coverage requirements can be respectively indicated.
  • the starting position of the DCI has a corresponding relationship with other configuration parameters of the communication channel.
  • the starting position of the DCI has a corresponding relationship with the maximum number of repetitions/cycle of the DCI, or the starting position of the DCI and the at least one frequency domain position/repetition period/change period of the communication channel respectively Correspondence relationship.
  • the starting position is a time domain starting position.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring indication information includes: the terminal device slave system message Obtain the indication information.
  • the communication channel is an SC-MTCH
  • the acquiring, by the terminal device, the indication information, that the terminal device acquires the indication information from an SC-MCCH is an SC-MTCH
  • the indication information is further used to indicate at least one period of the DCI, at least one maximum number of repetitions, and/or a starting position of the at least one search space.
  • the terminal device receives the multicast information according to the at least one starting location, the at least one period, the at least one maximum number of repetitions, and/or the starting location of the at least one search space.
  • the DCI includes information indicating a transport block and/or a transport block group for carrying the communication channel.
  • an embodiment of the present application provides a communication method, including:
  • the base station generates indication information, where the indication information is used to indicate at least one starting location of the downlink control information DCI of the communication channel;
  • the base station transmits the indication information.
  • the terminal device can detect the DCI according to the starting position of the DCI, and the terminal device is prevented from blindly detecting the starting position of the DCI, thereby saving power consumption of the terminal device.
  • the at least one starting location respectively corresponds to multicast information with different coverage requirements.
  • the starting position of the DCI corresponding to the multicast information having different coverage requirements can be respectively indicated.
  • the starting position of the DCI has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one starting position of the DCI has a corresponding relationship with at least one maximum repetition number/cycle of the DCI, or at least one starting position of the DCI and at least one frequency domain position of the communication channel respectively.
  • / Repeat cycle / change cycle has a correspondence.
  • the indication information is located in a system message, where the communication letter is The track is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • the indication information is located in an SC-MCCH, and the communication channel is an SC-MTCH.
  • the indication information is further used to indicate a period of the DCI, a maximum number of repetitions, and/or a starting position of the search space.
  • the DCI includes information indicating a transport block and/or a transport block group for carrying the communication channel.
  • an embodiment of the present application provides a communication method, including:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one frequency domain location of the communication channel;
  • the terminal device receives the multicast information sent by the base station according to the at least one frequency domain location, where the multicast information is carried on the communication channel.
  • the receiving efficiency of the terminal device can be improved.
  • the frequency domain location of the communication channel may also be a frequency domain location of the DCI used to schedule the communication channel.
  • the at least one frequency domain location respectively corresponds to multicast information with different coverage requirements.
  • the frequency domain locations corresponding to the multicast information having different coverage requirements can be respectively indicated. This enables different frequency domain locations to be configured for multicast information with different coverage requirements.
  • the frequency domain location of the communication channel has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one frequency domain location of the communication channel has a corresponding relationship with at least one start location/maximum number of repetitions/cycle of the DCI, or at least one frequency domain location of the communication channel and the communication channel respectively At least one repetition period/change period has a corresponding relationship.
  • the indication information is used to indicate an identifier of a carrier where the communication channel is located.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring indication information includes: the terminal device slave system message Obtain the indication information.
  • the communication channel is an SC-MTCH
  • the acquiring, by the terminal device, the indication information, that the terminal device acquires the indication information from an SC-MCCH is an SC-MTCH
  • an embodiment of the present application provides a communication method, including:
  • the base station generates indication information, where the indication information is used to indicate at least one frequency domain location of the communication channel;
  • the base station transmits the indication information.
  • the at least one frequency domain location respectively corresponds to multicast information with different coverage requirements.
  • the frequency domain locations corresponding to the multicast information having different coverage requirements can be respectively indicated. This enables different frequency domain locations to be configured for multicast information with different coverage requirements.
  • the frequency domain location of the communication channel has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one frequency domain location of the communication channel has a corresponding relationship with at least one start location/maximum number of repetitions/cycle of the DCI, or at least one frequency domain location of the communication channel and the communication channel respectively At least one repetition period/change period has a corresponding relationship.
  • the indication information is used to indicate an identifier of a carrier where the communication channel is located.
  • the indication information is located in a system message, where the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • the indication information is located in an SC-MCCH, and the communication channel is an SC-MTCH.
  • an embodiment of the present application provides a communication method, including:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one quantity of a transport block and/or a transport block group for carrying a communication channel;
  • the terminal device receives multicast information sent by the base station according to the at least one quantity, and the multicast information is carried on the communication channel.
  • the power consumption of the terminal device when detecting multicast information can be reduced.
  • the at least one quantity respectively corresponds to multicast information with different coverage requirements.
  • the number of transport blocks and/or transport block groups used to carry multicast information with different coverage requirements can be indicated separately.
  • multicast information with different coverage requirements can be mapped to different numbers of transport blocks and/or transport block groups, which is beneficial to save resources.
  • the at least one quantity has a corresponding relationship with other configuration parameters of the communication channel.
  • the at least one quantity has a corresponding relationship with at least one starting position/maximum number of repetitions/cycle of the DCI of the communication channel, respectively, or the at least one quantity is respectively associated with at least one frequency domain position of the communication channel/
  • the repetition period/change period has a corresponding relationship.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring indication information includes: the terminal device slave system message Obtain the indication information.
  • the communication channel is an SC-MTCH
  • the acquiring, by the terminal device, the indication information, that the terminal device acquires the indication information from an SC-MCCH is an SC-MTCH
  • an embodiment of the present application provides a communication method, including:
  • the base station generates indication information, where the indication information is used to indicate at least one quantity for carrying a communication channel transport block and/or a transport block group;
  • the base station sends the indication information.
  • the terminal device can receive the multicast information according to the number, thereby reducing the power consumption of the terminal device when detecting the multicast information.
  • the at least one quantity respectively corresponds to multicast information with different coverage requirements.
  • the number of transport blocks and/or transport block groups used to carry multicast information with different coverage requirements may be indicated separately.
  • multicast information with different coverage requirements can be mapped to different numbers of transport blocks and/or transport block groups, which is beneficial to save resources.
  • the frequency domain location of the communication channel has a corresponding relationship with other configuration parameters of the communication channel.
  • the at least one quantity has a corresponding relationship with at least one starting position/maximum number of repetitions/cycle of the DCI of the communication channel, respectively, or the at least one quantity is respectively associated with at least one frequency domain position of the communication channel/
  • the repetition period/change period has a corresponding relationship.
  • the at least one quantity respectively corresponds to multicast information with different coverage requirements.
  • it can be indicated separately for carrying multicasts with different coverage requirements.
  • the number of transport blocks and/or transport block groups of information can be mapped to different numbers of transport blocks and/or transport block groups, which is beneficial to save resources.
  • the indication information is located in a system message, where the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • the indication information is located in an SC-MCCH, and the communication channel is an SC-MTCH.
  • the embodiment of the present application provides a communication method, including:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one quantity of a process of the multicast service
  • the terminal device receives multicast information sent by the base station according to at least one quantity of the process of the multicast service, where the multicast information is carried on the communication channel.
  • the multicast service is carried on the SC-MTCH.
  • the at least one quantity respectively corresponds to multicast information with different coverage requirements.
  • the number of processes of the multicast service corresponding to the multicast information having different coverage requirements can be respectively indicated.
  • At least one quantity of the process of the multicast service has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one quantity of the process of the multicast service has a corresponding relationship with at least one start position/maximum number of repetitions/cycle of the DCI of the communication channel, or at least one quantity of the process of the multicast service
  • At least one frequency domain location/repetition cycle/change cycle of the communication channel has a corresponding relationship.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring indication information includes: the terminal device slave system message Obtain the indication information.
  • the communication channel is an SC-MTCH
  • the acquiring, by the terminal device, the indication information, that the terminal device acquires the indication information from an SC-MCCH is an SC-MTCH
  • the present application provides a communication method, including:
  • the base station generates indication information, where the indication information is used to indicate at least one quantity of a process of the multicast service
  • the base station transmits the indication information.
  • the multicast service is carried on the SC-MTCH.
  • the terminal device can receive the multicast information according to the quantity, which is beneficial to reducing the power consumption of the terminal device when detecting the multicast information.
  • the at least one quantity respectively corresponds to multicast information with different coverage requirements.
  • the number of processes of the multicast service corresponding to the multicast information having different coverage requirements can be respectively indicated.
  • At least one quantity of the process of the multicast service has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one quantity of the process of the multicast service has a corresponding relationship with at least one start position/maximum number of repetitions/cycle of the DCI of the communication channel, or at least one quantity of the process of the multicast service
  • At least one frequency domain location/repetition cycle/change cycle of the communication channel has a corresponding relationship.
  • the indication information is located in a system message, where the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • the indication information is located in an SC-MCCH, and the communication channel is an SC-MTCH.
  • the embodiment of the present application provides a communication method, including:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one repetition period and/or at least one change period of the communication channel, and each of the at least one repetition period is an integer multiple of a period of the DCI;
  • the terminal device receives multicast information sent by the base station according to the at least one repetition period and/or at least one change period, and the multicast information is carried on the communication channel.
  • the reception efficiency of the terminal device can be improved by receiving the multicast information according to the repetition period and/or the change period for the communication channel.
  • the at least one repetition period and/or the at least one change period respectively correspond to multicast information having different coverage requirements.
  • the repetition period and/or the change period corresponding to the multicast information having different coverage requirements may be respectively indicated.
  • the repetition period/change period of the communication channel has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one repetition period/change period of the communication channel has a correspondence with at least one start position/maximum number of repetitions/cycle of DCI of the communication channel, or at least one repetition period/change of the communication channel
  • the periods respectively have a corresponding relationship with at least one frequency domain position of the communication channel.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring indication information includes: the terminal device slave system message Obtain the indication information.
  • the communication channel is an SC-MTCH
  • the acquiring, by the terminal device, the indication information, that the terminal device acquires the indication information from an SC-MCCH is an SC-MTCH
  • the embodiment of the present application provides a communication method, including:
  • the base station generates indication information, where the indication information is used to indicate at least one repetition period and/or at least one change period of the communication channel, and each of the at least one repetition period has an integer multiple relationship with the period of the DCI;
  • the base station transmits the indication information.
  • the terminal device can receive the multicast information according to the repetition period and/or the change period for the communication channel, thereby improving the reception efficiency of the terminal device.
  • the at least one repetition period and/or the at least one change period respectively correspond to multicast information having different coverage requirements.
  • the repetition period and/or the change period corresponding to the multicast information having different coverage requirements may be respectively indicated.
  • the repetition period/change period of the communication channel has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one repetition period/change period of the communication channel has a correspondence with at least one start position/maximum number of repetitions/cycle of DCI of the communication channel, or at least one repetition period/change of the communication channel
  • the periods respectively have a corresponding relationship with at least one frequency domain position of the communication channel.
  • the indication information is located in a system message, where the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • the indication information is located in an SC-MCCH, and the communication channel is an SC-MTCH.
  • the embodiment of the present application provides a communication method, including:
  • the terminal device acquires indication information, where the indication information is used to indicate a multiple of each repetition period of the at least one repetition period of the communication channel with respect to a period of the DCI;
  • the terminal device receives multicast information sent by the base station according to a multiple of each of the at least one repetition period with respect to a period of the DCI, where the multicast information is carried on the communication channel.
  • the multiple of the repetition period relative to the period of the DCI may be an integer or a decimal.
  • the terminal device receives the multicast information sent by the base station according to a multiple of the repetition period of the at least one repetition period with respect to the DCI period, including:
  • the terminal device Determining, by the terminal device, the at least one repetition period according to a multiple of a period of each of the at least one repetition period with respect to a DCI;
  • the terminal device receives the multicast information according to the at least one repetition period.
  • the at least one repetition period respectively corresponds to multicast information with different coverage requirements.
  • the repetition period corresponding to the multicast information having different coverage requirements can be respectively indicated. This can configure different repetition periods for multicast information with different coverage requirements, which is conducive to resource conservation.
  • the repetition period of the communication channel has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one repetition period of the communication channel has a correspondence with at least one start position/maximum number of repetitions/cycle of the DCI of the communication channel, respectively, or at least one repetition period of the communication channel is respectively associated with the communication
  • At least one frequency domain location of the channel has a corresponding relationship.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring indication information includes: the terminal device slave system message Obtain the indication information.
  • the communication channel is an SC-MTCH
  • the acquiring, by the terminal device, the indication information, that the terminal device acquires the indication information from an SC-MCCH is an SC-MTCH
  • the embodiment of the present application provides a communication method, including:
  • the base station generates indication information, where the indication information is used to indicate a multiple of each repetition period of the at least one repetition period of the communication channel with respect to the period of the DCI;
  • the base station sends the indication information.
  • the multiple of the repetition period relative to the period of the DCI may be an integer or a decimal.
  • the at least one repetition period respectively corresponds to multicast information with different coverage requirements.
  • the repetition period corresponding to the multicast information having different coverage requirements can be respectively indicated. This can configure different repetition periods for multicast information with different coverage requirements, which is conducive to resource conservation.
  • the repetition period of the communication channel has a corresponding relationship with other configuration parameters of the communication channel.
  • at least one repetition period of the communication channel has a correspondence with at least one start position/maximum number of repetitions/cycle of the DCI of the communication channel, respectively, or at least one repetition period of the communication channel is respectively associated with the communication
  • At least one frequency domain location of the channel has a corresponding relationship.
  • the indication information is located in a system message, where the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • the indication information is located in an SC-MCCH, and the communication channel is an SC-MTCH.
  • the embodiment of the present application provides a communication method, including:
  • the terminal device acquires indication information, where the indication information is used to indicate a priority of the communication channel;
  • the terminal device receives the multicast information sent by the base station according to the priority of the communication channel, and the multicast information is carried on the communication channel.
  • the priority of the communication channel may be a priority of other channels that the communication channel receives or transmits with respect to the terminal device.
  • the success rate of the terminal device capable of receiving the multicast information can be improved.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring indication information includes: the terminal device slave system message Obtain the indication information.
  • the communication channel is an SC-MTCH
  • the acquiring, by the terminal device, the indication information, that the terminal device acquires the indication information from an SC-MCCH is an SC-MTCH
  • the embodiment of the present application provides a communication method, including:
  • the base station generates indication information, where the indication information is used to indicate a priority of the communication channel
  • the base station sends the indication information.
  • the priority of the communication channel may be a priority of other channels that the communication channel receives or transmits with respect to the terminal device.
  • the terminal device can receive the multicast information according to the priority, so that the success rate of receiving the multicast information by the terminal device can be improved.
  • the indication information is located in a system message, where the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • the indication information is located in an SC-MCCH, and the communication channel is an SC-MTCH.
  • the embodiment of the present application provides a communication method, including:
  • the terminal device receives downlink control information DCI of the communication channel, the DCI includes indication information, and the indication information is used to indicate an identifier of a transport block and/or a transport block group for carrying the communication channel.
  • the terminal device By carrying the identification of the transport block and/or the transport block group for carrying the communication channel in the DCI, the terminal device can be made aware of the information of the transport block and/or the transport block group for carrying the communication channel, so that the terminal device can be reduced. Power consumption.
  • the indication information is further used to indicate the number of transport blocks and/or transport block groups used to carry the communication channel.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • the embodiment of the present application provides a communication method, including:
  • the base station generates downlink control information (DCI) of the communication channel, where the DCI includes indication information, where the indication information is used to indicate an identifier of a transport block and/or a transport block group used to carry the communication channel;
  • DCI downlink control information
  • the base station transmits the downlink control information DCI.
  • the terminal device can be made aware of the transport block and/or the transport block group for carrying the communication channel, thereby enabling Reduce the power consumption of the terminal device.
  • the indication information is further used to indicate the number of transport blocks and/or transport block groups used to carry the communication channel.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH.
  • a communication method comprising:
  • the terminal device acquires indication information, where the indication information is used to indicate multiple maximum repetition times and/or multiple periods of downlink control information DCI of the communication channel;
  • the terminal device receives the DCI according to the plurality of maximum repetition times and/or multiple cycles.
  • the efficiency of detecting the DCI can be improved, so that the power consumption of the terminal device can be reduced.
  • the multiple maximum number of repetitions and/or multiple periods of the DCI respectively correspond to multicast information with different coverage requirements.
  • the maximum number of repetitions and/or periods of DCI corresponding to the multicast information having different coverage requirements may be respectively indicated.
  • the multiple maximum repetition times/cycle of the DCI have a corresponding relationship with other configuration parameters of the communication channel.
  • the plurality of maximum repetition times/periods of the DCI respectively have a correspondence relationship with at least one start position of the DCI, or a plurality of maximum repetition times/cycles of the DCI and at least one frequency domain of the communication channel.
  • the position/cycle/change cycle has a corresponding relationship.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring indication information includes: the terminal device slave system message Obtain the indication information.
  • the communication channel is an SC-MTCH
  • the acquiring, by the terminal device, the indication information, that the terminal device acquires the indication information from an SC-MCCH is an SC-MTCH
  • the embodiment of the present application provides a communication method, including:
  • the base station generates indication information, where the indication information is used to indicate multiple maximum repetition times and/or multiple periods of downlink control information DCI of the communication channel;
  • the base station transmits the indication information.
  • the terminal device can detect the DCI according to the plurality of maximum repetition times and/or the plurality of cycles, and can improve the efficiency of the terminal device detecting the DCI, thereby reducing the power consumption of the terminal device.
  • the multiple maximum repetition times/cycle of the DCI have a corresponding relationship with other configuration parameters of the communication channel.
  • the plurality of maximum repetition times/periods of the DCI respectively have a correspondence relationship with at least one start position of the DCI, or a plurality of maximum repetition times/cycles of the DCI and at least one frequency domain of the communication channel.
  • the position/cycle/change cycle has a corresponding relationship.
  • the indication information is located in a system message, where the communication channel is an SC-MCCH or an SC-MTCH.
  • the indication information is located in an SC-MCCH, and the communication channel is an SC-MTCH.
  • an embodiment of the present invention provides a communication device, which has a function of implementing the behavior of a terminal device in the foregoing method embodiment.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the communication device includes a processor and a receiver, the processor is configured to acquire indication information, and the receiver is configured to receive a message according to the acquired indication information.
  • the embodiment of the present invention provides another communication device, which has the function of implementing the behavior of the base station in the foregoing method embodiment.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the communication device includes a processor and a transmitter for generating indication information, the transmitter for transmitting a message according to the generation indication information.
  • an embodiment of the present invention provides a communication system, where the system includes the base station and the terminal device, and the system includes the base station and the network entity in the foregoing aspect; or the system includes the foregoing aspects.
  • the base station, terminal device and network entity are included in the foregoing aspect.
  • FIG. 1 is a schematic diagram of the principle of SC-PTM
  • FIG. 3 is a schematic flowchart of a communication method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a communication method according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the principle of a communication method according to another embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing the principle of a communication method according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram showing the principle of a communication method according to another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a terminal of a base station according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a terminal of a base station according to an embodiment of the present invention.
  • the embodiments of the present invention can be applied to an LTE system, and can also be applied to other wireless communication systems, such as a Global System for Mobile Communication (GSM), a Universal Mobile Telecommunications System (UMTS), and code division multiple access. Code Division Multiple Access (CDMA) system, as well as new network systems.
  • GSM Global System for Mobile Communication
  • UMTS Universal Mobile Telecommunications System
  • CDMA Code Division Multiple Access
  • the terminal device may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem.
  • the wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • RAN Radio Access Network
  • RAN can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • RAN Radio Access Network
  • it may be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with a wireless access network.
  • a wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point.
  • Remote Terminal Access Terminal, User Terminal, User Agent, User Device, or User Equipment.
  • the base station may be configured to convert the received air frame and the IP packet into a router between the wireless terminal and the rest of the access network, where the rest of the access network may include the Internet. Protocol (IP) network.
  • IP Internet. Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a Global System for Mobile Communication (GSM) or a Base Transceiver Station (BTS) in Code Division Multiple Access (CDMA), or may be a wideband code division multiple access.
  • GSM Global System for Mobile Communication
  • BTS Base Transceiver Station
  • CDMA Code Division Multiple Access
  • the base station (NodeB) in the (Wideband Code Division Multiple Access, WCDMA) may also be an evolved base station (eNB or e-NodeB, evolutional Node B) in the LTE, which is not limited in the embodiment of the present invention.
  • eNB evolved base station
  • e-NodeB evolutional Node B
  • the term "and/or” is merely an association relationship describing an associated object, indicating that there may be three relationships.
  • a and / or B can mean: exist alone A, there are three cases of A and B, and B alone.
  • the character "/" in this article generally indicates that the contextual object is an "or” relationship.
  • A, B and/or C are A and/or B and/or C.
  • the configuration parameters of the communication channel include, but are not limited to, the start position of the DCI of the communication channel, the maximum number of repetitions of the DCI of the communication channel, the period of the DCI of the communication channel, the frequency domain position of the communication channel, The repetition period of the communication channel and the change period of the communication channel.
  • the frequency domain location of the communication channel can be understood as the frequency domain location of the communication channel itself, and can also be understood as the frequency domain location of the DCI used to schedule the communication channel.
  • FIG. 3 is a schematic flow chart of a communication method 300 in accordance with an embodiment of the present invention. As shown in FIG. 3, method 300 includes the following.
  • the terminal device acquires indication information, where the indication information is used to indicate at least one starting location of the DCI of the communication channel.
  • the communication channel can be a multicast channel.
  • the DCI of the communication channel is used to schedule multicast information carried on the communication channel.
  • the multicast information may be the configuration information of the SC-MTCH or the multicast service data. If the communication channel is the SC-MCCH, the DCI of the SC-MCCH is used to schedule the configuration information of the SC-MTCH carried on the SC-MCCH; if the communication channel is the SC-MTCH, the DCI of the SC-MTCH is used to schedule the bearer. Multicast service data on SC-MTCH.
  • the starting position of the DCI refers to the starting position of the time domain.
  • the terminal device receives the DCI according to at least one starting location.
  • the terminal device By receiving the DCI according to the starting position of the DCI, the terminal device is prevented from blindly detecting the starting position of the DCI, which can save resource overhead and power consumption of the terminal device.
  • the indication information is further used to indicate at least one period of the DCI, at least one maximum number of repetitions, and/or a starting position of the at least one search space.
  • step 310 may further include:
  • the terminal device detects the DCI according to at least one starting position of the DCI, and at least one period of the DCI, at least one maximum number of repetitions, and/or a starting position of at least one search space.
  • the indication information may be pre-configured in the terminal device or may be obtained from a message sent by the base station. If the indication information is pre-configured in the terminal device, the terminal device may acquire the indication information from the memory.
  • the communication method 400 includes: 410.
  • the base station generates the indication information.
  • the base station sends the indication information.
  • the base station can transmit the indication information in the form of a broadcast.
  • the terminal device acquires the indication information, including: the terminal device acquiring the indication information from a message sent by the base station.
  • the terminal device may receive the DCI according to at least one starting position of the DCI of the communication channel indicated by the indication information.
  • the communication channel is an SC-MCCH or an SC-MTCH
  • the indication information can be located in a system message.
  • the terminal device acquiring the indication information may include:
  • the terminal device obtains indication information from the system message.
  • the communication channel is an SC-MTCH
  • the indication information can be located in the SC-MCCH.
  • the terminal device acquiring the indication information may include:
  • the terminal device obtains indication information from the SC-MCCH.
  • the terminal equipment of the table type is basically covered.
  • MCS Modulation and Coding Scheme
  • the number of repetitions required is also higher.
  • there are application scenarios such as street lights being turned on.
  • the required MCS level is higher, requiring fewer repetitions or even no repetition. That is to say, the maximum number of repetitions and/or periods of the DCI corresponding to the multicast information having different coverage requirements are different. For example, the greater the maximum number of repetitions of the DCI corresponding to the multicast information that covers the larger demand, or the longer the period of the DCI corresponding to the multicast information that covers the larger demand.
  • different configuration information may be configured for the DCI corresponding to the multicast information with different coverage requirements, which is beneficial to save resources.
  • At least one starting location, at least one period, at least one maximum number of repetitions, and/or a starting location of at least one search space of the DCI indicated by the indication information may correspond to multicast information having different coverage requirements.
  • the start position, period, maximum number of repetitions, and/or search space of the DCI corresponding to the multicast information having different coverage requirements may be respectively indicated. Starting position.
  • the SC-MCCH or the SC-MTCH can be sent in different coverage levels, and the multicast configuration information or data of different multicast services can be placed in the SC-MCCH or SC-MTCH of the corresponding coverage level according to the respective requirements, thereby facilitating save resources.
  • the starting location of the DCI has a corresponding relationship to other configuration parameters of the communication channel.
  • the other configuration parameters of the communication channel may be the maximum number of repetitions of the DCI of the communication channel, the period of the DCI of the communication channel, the frequency domain location of the communication channel, the repetition period of the communication channel, or the change period of the communication channel.
  • the terminal device may determine the starting position of the DCI according to other configuration parameters of the communication channel and a pre-configured correspondence.
  • the indication information may directly indicate at least one starting location of the DCI, and the indication information may also indirectly indicate at least one starting location of the DCI by indicating other configuration parameters of the communication channel. This embodiment of the present invention does not limit this.
  • NB-IoT In order to meet the needs of wide coverage or deep coverage, NB-IoT requires a lot of repetition when transmitting data. This will cause the SC-MCCH to continue to take a long time and consume more resources when transmitting.
  • SC-MCCH transmission if it is only limited to one carrier (such as anchor carrier), it will cause load congestion on the carrier.
  • the embodiment of the present invention can support the base station to flexibly select which carrier to transmit the communication channel (SC-MCCH or SC-MTCH) on according to the load condition of each carrier, as shown in FIG. 5.
  • SC-MCCH can also support multi-carrier transmission.
  • the SC-MCCH bearer is transmitted within multiple TBs, and the SC-MCCH can also be transmitted over multiple carriers.
  • multiple TBs of the SC-MCCH can be placed on different carriers for transmission.
  • the SC-MCCH bearer is mapped to three different TBs, and three TBs are mapped to different carriers for transmission. It should be noted that, in FIG. 6, only one TB is transmitted on one carrier as an example, but the embodiment of the present invention does not limit this, and multiple TBs can also be transmitted on one carrier.
  • the carrier corresponding to the communication channel can be indicated to the terminal device, so that the terminal device can receive the multicast information on the corresponding carrier, and can refer to the receiving efficiency of the terminal device.
  • a communication method is provided by an embodiment of the present invention.
  • the communication method includes:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one frequency domain bit of the communication channel.
  • the terminal device receives the multicast information sent by the base station according to the at least one frequency domain location, and the multicast information is carried on the communication channel.
  • the receiving efficiency of the terminal device can be improved.
  • the indication information may be pre-configured in the terminal device or may be obtained from a message sent by the base station.
  • the base station generates the indication information and transmits the indication information.
  • the base station can transmit the indication information in the form of a broadcast.
  • the indication information is used to indicate an identification of a carrier on which the communication channel is located.
  • the identifier of the carrier where the communication channel is located may have multiple representations. For example, if the system has 3 PRBs, the identifier of the carrier may be 0, 1, or 2. It should be understood that the identification of the carrier may also follow the number of the PRB specified in the LTE system.
  • the at least one frequency domain location respectively corresponds to multicast information with different coverage requirements.
  • the frequency domain locations corresponding to the multicast information having different coverage requirements can be respectively indicated. This enables different frequency domain locations to be configured for multicast information with different coverage requirements.
  • the maximum number of repetitions and/or the period of the DCI corresponding to the multicast information with different coverage requirements is different. For example, the greater the maximum number of repetitions of the DCI corresponding to the multicast information that covers the larger demand, or the longer the period of the DCI corresponding to the multicast information that covers the larger demand.
  • the frequency domain location of the communication channel has a corresponding relationship to other configuration parameters of the communication channel.
  • the other configuration parameters of the communication channel may be a start position of the DCI of the communication channel, a maximum number of repetitions of the DCI of the communication channel, a period of the DCI of the communication channel, a repetition period of the communication channel, or a change period of the communication channel.
  • the terminal device may determine the frequency domain location of the communication channel according to other configuration parameters of the communication channel and a pre-configured correspondence. Similar to the first embodiment, the indication information may directly or indirectly indicate at least one frequency domain location of the communication channel.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring the indication information includes: the terminal device acquiring the indication information from the system message.
  • the communication channel is an SC-MTCH
  • the obtaining information of the terminal device includes: The terminal device obtains indication information from the SC-MCCH.
  • the SC-MCCH is a multicast control channel and is used to indicate configuration information of multiple multicast processes.
  • the number of information bits in the SC-MCCH is large.
  • the embodiment of the present invention can carry the content in the SC-MCCH on multiple transport blocks (TBs) for transmission, as shown in FIG. 7.
  • the content in the SC-MCCH is carried in multiple TBs for transmission, which can support SC-MCCH configuration.
  • the content in the SC-MCCH indicates the configuration information of multiple multicast sessions at the same time, since different user groups of different multicast sessions are different, the number of repetitions required for different sessions is different (for example, a session with a good user group environment) Only a small amount of repetition or non-repetition is required; a session with a bad user group environment needs a lot of repetition to ensure coverage).
  • the contents of the SC-MCCH are all placed within 1 TB, only the requirements in all sessions can be met. The number of repetitions with the highest number of repetitions is transmitted, resulting in waste of resources. Therefore, the seesion in the SC-MCCH is carried on multiple transport blocks, which can avoid resource waste. It should be noted that one or more sees can be carried on one TB, which is not limited in this embodiment of the present invention.
  • different sessions in the SC-MCCH are carried on multiple TBs, and different sessions can be placed on different carriers for transmission, which can enhance scheduling flexibility.
  • the content in the SC-MTCH can be carried on multiple TBs for transmission, and details are not described herein again.
  • the number of transport blocks and/or transport block groups corresponding to the communication channel (such as SC-MCCH or SC-MTCH) can be indicated to the terminal device, so that the terminal device detects a corresponding number of transmissions for carrying multicast information. After the block and/or the block group is transmitted, the detection is automatically stopped, and the power consumption of the terminal device can be reduced.
  • the embodiment of the invention provides a communication method, and the communication method includes:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one quantity of the transport block and/or the transport block group used to carry the communication channel;
  • the terminal device receives the multicast information sent by the base station according to the at least one quantity, and the multicast information is carried on the communication channel.
  • the power consumption of the terminal device when detecting multicast information can be reduced.
  • the indication information may be pre-configured in the terminal device or may be obtained from a message sent by the base station.
  • the base station generates the indication information and transmits the indication information.
  • the base station can transmit the indication information in the form of a broadcast.
  • At least one quantity respectively corresponds to multicast information having different coverage requirements.
  • the number of transport blocks and/or transport block groups used to carry multicast information with different coverage requirements may be indicated separately.
  • multicast information with different coverage requirements can be mapped to different numbers of transport blocks and/or transport block groups, which is beneficial to save resources.
  • the maximum number of repetitions and/or the period of the DCI corresponding to the multicast information with different coverage requirements is different. For example, the greater the maximum number of repetitions of the DCI corresponding to the multicast information that covers the larger demand, or the longer the period of the DCI corresponding to the multicast information that covers the larger demand.
  • At least one of the numbers has a corresponding relationship to other configuration parameters of the communication channel.
  • the other configuration parameters of the communication channel may be a start position of the DCI of the communication channel, a maximum number of repetitions of the DCI of the communication channel, a period of the DCI of the communication channel, a frequency domain position of the communication channel, a repetition period of the communication channel, or a communication.
  • the change cycle of the channel may be a start position of the DCI of the communication channel, a maximum number of repetitions of the DCI of the communication channel, a period of the DCI of the communication channel, a frequency domain position of the communication channel, a repetition period of the communication channel, or a communication.
  • the terminal device may determine the number of transport blocks and/or transport block groups used to carry the communication channel based on other configuration parameters of the communication channel and pre-configured correspondences. Similar to the first embodiment, the indication information may directly or indirectly indicate at least one number of transport blocks and/or transport block groups for carrying the communication channel.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring the indication information includes: the terminal device acquiring the indication information from the system message.
  • the communication channel is an SC-MTCH
  • the obtaining, by the terminal device, the indication information comprises: the terminal device acquiring the indication information from the SC-MCCH.
  • the indication information for indicating the TB and/or TB group may also be carried in the DCI of the communication channel.
  • the DCI may be a DCI used to schedule the SC-MCCH or a DCI used to schedule the SC-MTCH.
  • the terminal device can learn the TB information of the SC-MCCH/SC-MTCH, and the terminal device can detect the TB and/or the TB group in a targeted manner, which can further reduce the power consumption of the terminal device.
  • the embodiment of the invention further provides a communication method, the communication method comprising:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one quantity of a process of the multicast service
  • the terminal device receives the multicast information sent by the base station according to at least one quantity of the process of the multicast service, and the multicast information is carried on the communication channel.
  • the multicast service is carried on the SC-MTCH.
  • the terminal device After the terminal device learns the number of processes of the multicast service, if the terminal device detects the process of the certain number of multicast services, the terminal device can determine that all the processes have been received, and the detection of the terminal device can be reduced without continuing detection. Consumption.
  • receiving multicast information according to the number of processes of the multicast service is beneficial to reducing power consumption of the terminal device when detecting multicast information.
  • the indication information may be pre-configured in the terminal device or may be obtained from a message sent by the base station.
  • the base station generates the indication information and transmits the indication information.
  • the base station can transmit the indication information in the form of a broadcast.
  • At least one quantity respectively corresponds to multicast information having different coverage requirements.
  • the number of processes of the multicast service corresponding to the multicast information having different coverage requirements can be respectively indicated.
  • the maximum number of repetitions and/or the period of the DCI corresponding to the multicast information with different coverage requirements is different. For example, the greater the maximum number of repetitions of the DCI corresponding to the multicast information that covers the larger demand, or the longer the period of the DCI corresponding to the multicast information that covers the larger demand.
  • At least one number of processes of the multicast service have a corresponding relationship with other configuration parameters of the communication channel.
  • the other configuration parameters of the communication channel may be a start position of the DCI of the communication channel, a maximum number of repetitions of the DCI of the communication channel, a period of the DCI of the communication channel, a frequency domain position of the communication channel, a repetition period of the communication channel, or a communication.
  • the change cycle of the channel may be a start position of the DCI of the communication channel, a maximum number of repetitions of the DCI of the communication channel, a period of the DCI of the communication channel, a frequency domain position of the communication channel, a repetition period of the communication channel, or a communication.
  • the terminal device can determine the number of processes of the multicast service according to other configuration parameters of the communication channel and the pre-configured correspondence. Similar to the first embodiment, the indication information may directly or indirectly indicate at least one number of processes of the multicast service.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell
  • the multicast service channel SC-MTCH includes: the terminal device acquiring the indication information from the system message.
  • the communication channel is an SC-MTCH
  • the obtaining, by the terminal device, the indication information comprises: the terminal device acquiring the indication information from the SC-MCCH.
  • the embodiment of the invention provides a communication method, and the communication method includes:
  • the terminal device acquires indication information, where the indication information is used to indicate at least one repetition period and/or at least one change period of the communication channel, and each of the at least one repetition period is an integer multiple of a period of the DCI;
  • the terminal device receives the multicast information sent by the base station according to at least one repetition period and/or at least one change period, and the multicast information is carried on the communication channel.
  • the reception efficiency of the terminal device can be improved by receiving the multicast information according to the repetition period and/or the change period for the communication channel.
  • the indication information may be pre-configured in the terminal device or may be obtained from a message sent by the base station.
  • the base station generates the indication information and transmits the indication information.
  • the base station can transmit the indication information in the form of a broadcast.
  • At least one repetition period and/or at least one change period respectively correspond to multicast information having different coverage requirements.
  • the repetition period and/or the change period corresponding to the multicast information having different coverage requirements may be respectively indicated.
  • the maximum number of repetitions and/or the period of the DCI corresponding to the multicast information with different coverage requirements is different. For example, the greater the maximum number of repetitions of the DCI corresponding to the multicast information that covers the larger demand, or the longer the period of the DCI corresponding to the multicast information that covers the larger demand.
  • the repetition period/change period of the communication channel has a corresponding relationship with other configuration parameters of the communication channel.
  • the other configuration parameters of the communication channel may be a start position of the DCI of the communication channel, a maximum number of repetitions of the DCI of the communication channel, a period of the DCI of the communication channel, or a frequency domain position of the communication channel.
  • the terminal device may determine a repetition period/change period of the communication channel according to other configuration parameters of the communication channel and a pre-configured correspondence. Similar to the first embodiment, the indication information may directly or indirectly indicate the repetition period/change period of the communication channel.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring the indication information includes: the terminal device acquiring the indication information from the system message.
  • the communication channel is an SC-MTCH
  • the obtaining, by the terminal device, the indication information comprises: the terminal device acquiring the indication information from the SC-MCCH.
  • the SIB directly indicates the value of the Repetition Period (RP).
  • RP Repetition Period
  • Possible values are: 20ms, 40ms, Eight values of 80ms, 160ms, 320ms, 640ms, 1280ms, and 2560ms.
  • RP is more likely to be valued and requires more bits due to the need to face different coverage levels.
  • the worse the coverage level the longer the RP.
  • the worse the coverage level the longer the DCI period will be, and the DCI period will be indicated in the SIB. Therefore, in the embodiment of the present invention, by indicating the multiple of the period of the RP with respect to the DCI, the number of bits used to indicate the RP can be reduced, thereby saving overhead.
  • the embodiment of the invention provides a communication method, and the communication method includes:
  • the terminal device acquires indication information, where the indication information is used to indicate a multiple of each repetition period of the at least one repetition period of the communication channel with respect to the period of the DCI;
  • the terminal device receives the multicast information sent by the base station according to a multiple of the repetition period of the at least one repetition period with respect to the DCI period, and the multicast information is carried on the communication channel.
  • the terminal device determines at least one repetition period according to a multiple of each repetition period of the at least one repetition period with respect to the DCI period; then, the terminal device receives the multicast information according to at least one repetition period.
  • the multiple of each repetition period relative to the period of the DCI may be an integer or a decimal.
  • the indication information may be pre-configured in the terminal device or may be obtained from a message sent by the base station.
  • the base station generates the indication information and transmits the indication information.
  • the base station can transmit the indication information in the form of a broadcast.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring the indication information includes: the terminal device acquiring the indication information from the system message.
  • the communication channel is an SC-MTCH
  • the obtaining, by the terminal device, the indication information comprises: the terminal device acquiring the indication information from the SC-MCCH.
  • multicast services and other types of services there are usually multicast services and other types of services, and other types of services, such as unicast normal data services, paging services, and the like.
  • the multicast service In NB-IoT, the multicast service usually has a large amount of service information, and the frequency resource of the NB-IoT is limited. Therefore, the multicast service generally lasts for a long time in the NB-IoT. During the reception of multicast services, there may be other types of services that occur at the same time. In some embodiments, the priority of the multicast service can be adjusted lower. However, for a signal such as paging, the UE that is receiving the multicast service pauses to receive the multicast service at intervals and then goes to receive the paging. If the paging period is short, the pair The multicast service is very serious, and the terminal device always fails to receive the multicast service.
  • a signal such as paging
  • the base station can flexibly configure the priority of the multicast service with respect to other types of services.
  • the terminal device can be instructed to receive the relative priority of the communication channel and other channels.
  • the other channel may be a paging channel, an uplink physical random access channel (PRACH) channel, a downlink data channel, or an uplink data channel.
  • PRACH physical random access channel
  • the base station indicates, in the SC-MCCH, 1 bit to indicate the relative priority of the SC-MTCH and the paging channel, 0 indicates that the UE preferentially receives the SC-MTCH, and 1 indicates that the UE preferentially receives the paging channel, or vice versa.
  • the base station uses 1 bit to indicate the relative priority of the SC-MCCH/SC-MTCH and the paging channel in the system message, where 0 indicates that the UE preferentially receives the SC-MCCH/SC-MTCH, and 1 indicates that the UE preferentially receives the UE. Paging channel, or vice versa.
  • the base station employs multiple bits in the SC-MCCH to indicate the relative priorities of the SC-MTCH and the plurality of other channels, respectively.
  • the base station uses multiple bits in the system message to indicate the relative priorities of the SC-MCCH/SC-MTCH and the plurality of other channels, respectively.
  • the embodiment of the invention provides a communication method, and the communication method includes:
  • the terminal device acquires indication information, where the indication information is used to indicate a priority of the communication channel;
  • the terminal device receives the multicast information sent by the base station according to the priority of the communication channel, and the multicast information is carried on the communication channel.
  • the priority of the communication channel may be a priority of the communication channel relative to other channels that the terminal device can receive.
  • the success rate of the terminal device capable of receiving the multicast information can be improved.
  • the indication information may be pre-configured in the terminal device or may be obtained from a message sent by the base station.
  • the base station generates the indication information and transmits the indication information.
  • the base station can transmit the indication information in the form of a broadcast.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring the indication information includes: the terminal device acquiring the indication information from the system message.
  • the communication channel is an SC-MTCH
  • the obtaining, by the terminal device, the indication information comprises: the terminal device acquiring the indication information from the SC-MCCH.
  • the embodiment of the invention provides a communication method, and the communication method includes:
  • the terminal device acquires indication information, where the indication information is used to indicate multiple maximum repetition times and/or multiple periods of the downlink control information DCI of the communication channel;
  • the terminal device receives the DCI according to a plurality of maximum repetition times and/or a plurality of cycles of the DCI.
  • the efficiency of detecting the DCI can be improved, so that the power consumption of the terminal device can be reduced.
  • the indication information may be pre-configured in the terminal device or may be obtained from a message sent by the base station.
  • the base station generates the indication information and transmits the indication information.
  • the base station can transmit the indication information in the form of a broadcast.
  • multiple maximum repetition times and/or multiple periods of the DCI respectively correspond to multicast information having different coverage requirements.
  • multicast information pairs with different coverage requirements can be indicated separately The maximum number of repetitions and/or periods of DCI.
  • the plurality of maximum repetitions/cycles of the DCI have a corresponding relationship with other configuration parameters of the communication channel.
  • the plurality of maximum repetition times/cycles of the DCI have a corresponding relationship with a plurality of start positions of the DCI, or a plurality of maximum repetition times/cycles of the DCI and a plurality of frequency domain positions/repeat cycles/change cycles of the communication channel have Correspondence relationship.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast service channel SC-MTCH
  • the terminal device acquiring the indication information includes: the terminal device acquiring the indication information from the system message.
  • the communication channel is an SC-MTCH
  • the obtaining, by the terminal device, the indication information comprises: the terminal device acquiring the indication information from the SC-MCCH.
  • the embodiment of the invention provides a communication method, and the communication method includes:
  • the base station transmits a DCI of the communication channel, the DCI including indication information indicating an identity of the transport block and/or the transport block group for carrying the communication channel;
  • the terminal device receives the DCI.
  • the terminal device By carrying the identification of the transport block and/or the transport block group for carrying the communication channel in the DCI, the terminal device can be made aware of the information of the transport block and/or the transport block group for carrying the communication channel, so that the terminal device can be reduced. Power consumption.
  • the indication information is further used to indicate the number of transport blocks and/or transport block groups used to carry the communication channel.
  • the communication channel is a single cell multicast control channel SC-MCCH or a single cell multicast traffic channel SC-MTCH.
  • FIG. 8 is a schematic structural diagram of a terminal device 800 according to an embodiment of the present invention. As shown in FIG. 8, the terminal device 800 includes a processing unit 810 and a receiving unit 820.
  • the processing unit 810 is configured to acquire indication information.
  • the processing unit 810 may be configured to obtain pre-configured indication information from the memory, or the processing unit unit 810 is configured to obtain the indication information from the message sent by the base station.
  • the receiving unit 820 is configured to receive a signal according to the indication information acquired by the processing unit 810.
  • the processing unit 810 is configured to acquire indication information, where the indication information is used to indicate at least one starting location of the DCI of the communication channel, and the receiving unit 820 is configured to receive the DCI according to the at least one starting location acquired by the processing unit 810. .
  • the terminal device is prevented from blindly detecting the starting position of the DCI, and the power consumption of the terminal device can be saved.
  • the functions of the respective units in the terminal device 800 are respectively implemented in order to implement the corresponding flow of the communication method according to the first embodiment. For the sake of brevity, the corresponding content is appropriately omitted herein.
  • the processing unit 810 is configured to obtain indication information, where the indication information is used to indicate at least one frequency domain location of the communication channel
  • the receiving unit 820 is configured to receive, according to the at least one frequency domain location acquired by the processing unit 810, the base station, Multicast information, which is carried on the communication channel.
  • Multicast information By transmitting multicast information to different carriers, efficient use of system resources is realized, and system capacity and throughput can be improved.
  • the receiving efficiency of the terminal device can be improved.
  • the functions of the respective units in the terminal device 800 are respectively implemented in order to implement the corresponding flow of the communication method of the second embodiment. For the sake of brevity, the corresponding content is appropriately omitted herein.
  • the processing unit 810 is configured to obtain indication information, where the indication information is used to indicate at least one quantity of a transport block and/or a transport block group for carrying a communication channel; and the receiving unit 820 is configured to obtain according to the processing unit 810. At least one of the number receives the multicast information sent by the base station.
  • the power consumption of the terminal device when detecting multicast information can be reduced.
  • the functions of the respective units in the terminal device 800 are respectively implemented in order to implement the corresponding flow of the communication method described in the third embodiment. For the sake of brevity, the corresponding content is appropriately omitted herein.
  • the processing unit 810 is configured to obtain indication information, where the indication information is used to indicate at least one quantity of a process of the multicast service, and the receiving unit 820 is configured to use at least one process of the multicast service acquired according to the processing unit 810.
  • the number receives the multicast information sent by the base station. By receiving multicast information according to the number of processes of the multicast service, it is advantageous to reduce power consumption of the terminal device when detecting multicast information.
  • the functions of the respective units in the terminal device 800 are respectively implemented in order to implement the corresponding flow of the communication method described in the fourth embodiment. For the sake of brevity, the corresponding content is appropriately omitted herein.
  • the processing unit 810 is configured to obtain indication information, where the indication information is used to indicate at least one repetition period of the communication channel and/or at least one change period, and each of the at least one repetition period is a period of the DCI. Integer multiple; receiving unit 820 is used according to the processing unit The at least one repetition period and/or the at least one change period acquired by the 810 receive the multicast information sent by the base station. The reception efficiency of the terminal device can be improved by receiving the multicast information according to the repetition period and/or the change period for the communication channel.
  • the functions of the respective units in the terminal device 800 are respectively implemented in order to implement the corresponding flow of the communication method described in the fifth embodiment. For the sake of brevity, the corresponding content is appropriately omitted herein.
  • the processing unit 810 is configured to acquire indication information, where the indication information is used to indicate a multiple of each repetition period of the at least one repetition period of the communication channel with respect to the DCI; the receiving unit 820 is configured to use, according to the processing unit 810, Each of the obtained at least one repetition period receives the multicast information transmitted by the base station with respect to a multiple of the period of the DCI.
  • the functions of the respective units in the terminal device 800 are respectively implemented in order to implement the corresponding flow of the communication method described in the sixth embodiment. For the sake of brevity, the corresponding content is appropriately omitted herein.
  • the processing unit 810 is configured to obtain indication information, where the indication information is used to indicate the priority of the communication channel, and the receiving unit 820 is configured to receive the multicast information sent by the base station according to the priority of the communication channel acquired by the processing unit 810. .
  • the processing unit 810 is configured to obtain indication information, where the indication information is used to indicate the priority of the communication channel
  • the receiving unit 820 is configured to receive the multicast information sent by the base station according to the priority of the communication channel acquired by the processing unit 810. .
  • the functions of the respective units in the terminal device 800 are respectively implemented in order to implement the corresponding flow of the communication method described in the seventh embodiment. For the sake of brevity, the corresponding content is appropriately omitted herein.
  • the processing unit 810 is configured to acquire indication information, where the indication information is used to indicate multiple maximum repetition times and/or multiple periods of downlink control information DCI of the communication channel, and the receiving unit 820 is configured to acquire according to the processing unit 810.
  • the DCI is received by multiple maximum repetitions and/or multiple cycles of the DCI.
  • FIG. 9 is a schematic structural diagram of a terminal device 900 according to another embodiment of the present invention.
  • the terminal device 900 includes a processor 910, a receiver 920, a memory 930, and a bus system 940.
  • the processor 910, the receiver 920, and the memory 930 are connected by a bus system 940.
  • the memory 930 can be used to store code and the like executed by the processor 910.
  • Receiver 920 is configured to receive signals under the control of processor 910.
  • the terminal device 900 may correspond to the terminal device in the communication method according to any one of the first embodiment to the eighth embodiment, and the terminal device 800 according to the embodiment of the present invention. For brevity, no further details are provided herein.
  • An embodiment of the present invention further provides another terminal device, where the terminal device includes: a receiving unit, configured to receive a DCI, where the DCI includes indication information, where the indication information is used to indicate a transport block and/or a transmission for carrying a communication channel.
  • the identity of the block group By acquiring the maximum number of repetitions and/or periods of the DCI, and according to the maximum number of repetitions and/or periods, the efficiency of detecting the DCI can be improved, so that the power consumption of the terminal device can be reduced.
  • the terminal device corresponds to the terminal device in the communication method described in Embodiment 9, and is not described herein again for brevity.
  • the receiving unit can be implemented by a receiver.
  • An embodiment of the present invention further provides another terminal device, where the terminal device includes: a receiver, configured to receive a DCI, where the DCI includes indication information, where the indication information is used to indicate a transport block and/or a transmission for carrying a communication channel. The identity of the block group.
  • the terminal device may further include other units or modules. For details, refer to the related description of the terminal device shown in FIG. 9, and the corresponding content is omitted here.
  • FIG. 10 is a schematic structural diagram of a base station 1000 according to an embodiment of the present invention. As shown in FIG. 10, the base station 1000 includes a processing unit 1010 and a transmitting unit 1020.
  • the processing unit 1010 may be configured to generate information of any one of Embodiments 1 to 9.
  • the sending unit 1020 can be configured to send information generated by the processing unit 1010.
  • processing unit 1020 generates indication information.
  • the indication information may be used to indicate at least one starting location of a DCI of the communication channel.
  • the terminal device can detect the DCI according to the starting position of the DCI, and the terminal device is prevented from blindly detecting the starting position of the DCI, thereby saving power consumption of the terminal device.
  • the indication information may be used to indicate at least one frequency domain location of the communication channel.
  • the indication information may be used to indicate a transport block and/or a transport for carrying a communication channel. At least one number of block groups.
  • the terminal device can receive the multicast information according to the number, thereby reducing the power consumption of the terminal device when detecting the multicast information.
  • the indication information may be used to indicate at least one quantity of a process of the multicast service.
  • the terminal device can receive the multicast information according to the quantity, which is beneficial to reducing the power consumption of the terminal device when detecting the multicast information.
  • the indication information may be used to indicate at least one repetition period and/or at least one change period of the communication channel.
  • the terminal device can receive the multicast information according to the repetition period and/or the change period for the communication channel, thereby improving the reception efficiency of the terminal device.
  • the indication information may be used to indicate a multiple of each repetition period of the at least one repetition period of the communication channel relative to the period of the DCI.
  • the indication information may be used to indicate a multiple of each repetition period of the at least one repetition period of the communication channel relative to the period of the DCI.
  • the indication information may be used to indicate a priority of the communication channel.
  • the terminal device can receive the multicast information according to the priority, so that the success rate of receiving the multicast information by the terminal device can be improved.
  • the indication information may be used to indicate a plurality of maximum repetition times and/or multiple periods of DCI of the communication channel.
  • the terminal device can detect the DCI according to the plurality of maximum repetition times and/or the plurality of cycles, and can improve the efficiency of the terminal device detecting the DCI, thereby reducing the power consumption of the terminal device.
  • the processing unit 1020 may further generate a DCI including indication information indicating an identity of a transport block and/or a transport block group for carrying the communication channel.
  • a DCI including indication information indicating an identity of a transport block and/or a transport block group for carrying the communication channel.
  • the base station 1000 may correspond to the base station in the communication method described in any one of Embodiments 1 to 9 above. To avoid repetition, details are not described herein again.
  • processing unit 1010 can be implemented by a processor, and the transmitting unit 1020 can be implemented by a transmitter.
  • FIG. 11 is a schematic structural diagram of a base station 1100 according to another embodiment of the present invention.
  • the terminal device 1100 includes a processor 1110, a transmitter 1120, a memory 1130, and a bus system 1140.
  • the processor 1110, the transmitter 1120, and the memory 1130 are connected by a bus system 1140.
  • the memory 1130 can be used by the storage processor 1110. Code, etc.
  • Transmitter 1120 is operative to transmit signals under the control of processor 1110.
  • the base station 1100 may correspond to the base station in the communication method according to any one of the first embodiment to the ninth embodiment, and the base station 1000 according to the embodiment of the present invention. For brevity, no further details are provided herein.
  • bus system in the above embodiments may include a power bus, a control bus, and a status signal bus in addition to the data bus.
  • bus system in the above embodiments may include a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as a bus system in the figure.
  • the memory in each of the above embodiments may include a volatile memory, such as a random-access memory (RAM); the memory may also include a non-volatile memory, such as a fast A flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); the memory may further include a combination of the above types of memories.
  • RAM random-access memory
  • non-volatile memory such as a fast A flash memory, a hard disk drive (HDD), or a solid-state drive (SSD)
  • the memory may further include a combination of the above types of memories.
  • the processor in each of the above embodiments may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the processor may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof.
  • the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of cells is only a logical function division.
  • multiple units or components may be combined or integrated. Go to 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 units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may 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.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure.
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave.
  • coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated medium.
  • a disk and a disc include a compact disc (CD), a laser disc, and a light.
  • Discs, digital versatile discs (DVDs), floppy discs, and Blu-ray discs where discs are usually magnetically replicated, while discs use lasers to optically replicate data. Combinations of the above should also be included within the scope of the computer readable media.

Abstract

本发明提供了一种通信方法、终端设备和基站，该通信方法包括：终端设备获取指示信息，所述指示信息用于指示通信信道的下行控制信息DCI的至少一个起始位置；所述终端设备根据所述至少一个起始位置接收所述DCI。通过根据DCI的起始位置接收DCI，避免了终端设备对DCI的起始位置进行盲检测，能够节省终端设备的资源开销和耗电量。

Description

通信方法、终端设备和基站 技术领域
本发明涉及通信领域，尤其涉及通信方法、终端设备和基站。
背景技术
机器类型通信(Machine Type Communication，简称“MTC”)又称为机器间通信(Machine To Machine，简称“M2M”)，或者物联网(Intent of Things，简称“IoT”)将是未来通信领域的一项重要应用。未来IoT通信将主要可能涵盖智能抄表、医疗检测监控、物流检测、工业检测监控、汽车联网、智能社区以及可穿戴设备通信等。
在IoT系统中，一类重要的IoT通信系统是基于现有蜂窝架构的通信系统，这类通信系统可以称为蜂窝(Cellular)IoT。在这种通信系统中，MTC基站终端设备之间一般不需要非常高的数据传输速率，但该MTC需要很大的覆盖面积。因此，在一个MTC基站下可能存在大量的终端设备，该终端设备可以涵盖智能水或电表、智能社区、监控、汽车、可穿戴终端设备等各种类型的终端设备。该类型的终端设备在与MTC基站进行通信过程中，对于功耗和成本的要求较高，因此终端设备的能力往往是受限制的。
在长期演进(Long term Evolution，简称“LTE”)系统中，单小区点对多点(Single Cell Point-to-Multipoint，简称“SC-PTM”)是一种基于组播的传播技术。在该组播技术中，包括两种逻辑信道：单小区组播控制信道(Single Cell Multicast Control Channel，简称“SC-MCCH”)和单小区组播业务信道(Single Cell Multicast Traffic Channel，简称“SC-MTCH”)。SC-MCCH是控制信道，用于传输终端设备接收SC-MTCH所需的配置信息(即SC-MTCH的配置信息)。SC-MTCH是数据信道，用于传输组播中的业务数据。相关的基本流程如图1所示。
广播信息块(System Information Block，简称“SIB”)里指示SC-MCCH的下行控制信道(Physical Downlink Control Channel，简称“PDCCH”)的配置信息；SC-MCCH的PDCCH里面携带SC-MCCH的下行共享信道(Physical Downlink Shared Channel，简称“PDSCH”)的配置信息；SC-MCCH的PDSCH里面携带SC-MTCH的PDCCH配置信息；SC-MTCH的PDCCH 里面携带SC-MTCH的PDSCH的配置信息；SC-MTCH的PDSCH里面携带组播的消息内容。因此，终端设备在接收SC-MCCH携带的SC-MTCH的配置信息或SC-MTCH携带的组播业务数据之前，需要获取用于调度SC-MCCH或SC-MTCH携带的数据的DCI的配置信息。
现有方案中，基站可以通过SIB向UE指示最大重复次数R、周期参数G、位置偏移参数offset，UE根据DCI的最大重复次数R、周期因子G和位置偏移参数offset确定一个搜索空间的起始位置，根据该起始位置对DCI进行盲检。比如，如图2所示，在一个搜索空间内，一个方块可看做是一个备选(candidate)，UE可以根据不同的DCI实际重复次数和DCI起始位置，盲检不同的candidate，直到检测成功位置。如果都不成功，则继续监听下一个DCI周期。如果将该方案应用于SC-PTM中，则将会导致UE的功耗较大。
由于IoT系统中对于终端设备的功耗和成本的要求较高，因此将SC-PTM技术应用于IoT系统中时，需要提供一种方法以降低终端设备检测DCI的功耗。
发明内容
本发明提供了一种通信方法、基站和终端设备，能够降低终端设备检测DCI的功耗。
第一方面，本申请实施例提供了一种通信方法，所述通信方法包括：
终端设备获取指示信息，所述指示信息用于指示通信信道的下行控制信息DCI的至少一个起始位置；
所述终端设备根据所述至少一个起始位置接收所述DCI。
通过根据DCI的起始位置检测DCI，避免了终端设备对DCI的起始位置进行盲检测，能够节省终端设备的功耗。
在一种可能的实现方式中，所述至少一个起始位置分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的DCI的起始位置。
在一种可能的实现方式中，所述DCI的起始位置与所述通信信道的其他配置参数具有对应关系。例如，所述DCI的起始位置与所述DCI的最大重复次数/周期具有对应关系，或者所述DCI的起始位置分别与所述通信信道的至少一个频域位置/重复周期/变更周期具有对应关系。
在一种可能的实现方式中，所述起始位置为时域起始位置。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从系统消息中获取所述指示信息。
在一种可能的实现方式中，所述通信信道为SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从SC-MCCH中获取所述指示信息。
在一种可能的实现方式中，所述指示信息还用于指示DCI的至少一个周期、至少一个最大重复次数和/或至少一个搜索空间的起始位置。
所述终端设备根据所述至少一个起始位置接收基站发送的组播信息，所述组播信息承载在所述通信信道上，包括：
所述终端设备根据所述至少一个起始位置、所述至少一个周期、所述至少一个最大重复次数和/或所述至少一个搜索空间的起始位置，接收所述组播信息。
在一种可能的实现方式中，所述DCI包括用于指示用于承载所述通信信道的传输块和/或传输块组的信息。
第二方面，本申请实施例提供了一种通信方法，包括：
基站生成指示信息，所述指示信息用于指示通信信道的下行控制信息DCI的至少一个起始位置；
基站发送所述指示信息。
通过发送通信信道的DCI的起始位置，使得终端设备能够根据DCI的起始位置检测DCI，避免了终端设备对DCI的起始位置进行盲检测，从而能够节省终端设备的功耗。
在一种可能的实现方式中，所述至少一个起始位置分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的DCI的起始位置。
在一种可能的实施例中，所述DCI的起始位置与所述通信信道的其他配置参数具有对应关系。例如，所述DCI的至少一个起始位置分别与所述DCI的至少一个最大重复次数/周期具有对应关系，或者所述DCI的至少一个起始位置分别与所述通信信道的至少一个频域位置/重复周期/变更周期具有对应关系。
在一种可能的实现方式中，所述指示信息位于系统消息中，所述通信信 道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
在一种可能的实现方式中，所述指示信息位于SC-MCCH中，所述通信信道为SC-MTCH。
在一种可能的实现方式中，所述指示信息还用于指示DCI的周期、最大重复次数和/或搜索空间的起始位置。
在一种可能的实现方式中，所述DCI包括用于指示用于承载所述通信信道的传输块和/或传输块组的信息。
第三方面，本申请实施例提供了一种通信方法，包括：
终端设备获取指示信息，所述指示信息用于指示通信信道的至少一个频域位置；
所述终端设备根据所述至少一个频域位置接收基站发送的组播信息，所述组播信息承载在所述通信信道上。
通过将组播信息发送到不同的载波上，实现了系统资源的有效利用，能够提高系统容量和吞吐率。
另外，通过根据频域位置接收基站发送的组播信息，能够提高终端设备的接收效率。
在一种可能的实现方式中，通信信道的频域位置还可以为用于调度该通信信道的DCI的频域位置。
可选地，所述至少一个频域位置分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的频域位置。这样能够为具有不同覆盖需求的组播信息配置不同的频域位置。
在一种可能的实现方式中，所述通信信道的频域位置与所述通信信道的其他配置参数具有对应关系。例如，所述通信信道的至少一个频域位置分别与所述DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述通信信道的至少一个频域位置分别与所述通信信道的至少一个重复周期/变更周期具有对应关系。
在一种可能的实现方式中，所述指示信息用于指示所述通信信道所在的载波的标识。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从系统消息中获取所述指示信息。
在一种可能的实现方式中，所述通信信道为SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从SC-MCCH中获取所述指示信息。
第四方面，本申请实施例提供了一种通信方法，包括：
基站生成指示信息，所述指示信息用于指示通信信道的至少一个频域位置；
基站发送所述指示信息。
通过发送通信信道的至少一个频域位置接收基站发送的组播信息，使得能够避免终端设备对通信信道的频域位置进行盲检测，从而能够节省终端设备的资源开销和耗电量。
可选地，所述至少一个频域位置分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的频域位置。这样能够为具有不同覆盖需求的组播信息配置不同的频域位置。
在一种可能的实现方式中，所述通信信道的频域位置与所述通信信道的其他配置参数具有对应关系。例如，所述通信信道的至少一个频域位置分别与所述DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述通信信道的至少一个频域位置分别与所述通信信道的至少一个重复周期/变更周期具有对应关系。
在一种可能的实现方式中，所述指示信息用于指示所述通信信道所在的载波的标识。
在一种可能的实现方式中，所述指示信息位于系统消息中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
在一种可能的实现方式中，所述指示信息位于SC-MCCH中，所述通信信道为SC-MTCH。
第五方面，本申请的实施例提供了一种通信方法，包括：
终端设备获取指示信息，所述指示信息用于指示用于承载通信信道的传输块和/或传输块组的至少一个数量；
所述终端设备根据所述至少一个数量接收基站发送的组播信息，所述组播信息承载在所述通信信道上。
通过根据用于承载通信信道的传输块和/或传输块组的数量接收组播信息，能够降低终端设备在检测组播信息时的功耗。
可选地，所述至少一个数量分别对应具有不同覆盖需求的组播信息。换 句话说，可以分别指示用于承载具有不同覆盖需求的组播信息的传输块和/或传输块组的数量。这样能够将具有不同覆盖需求的组播信息映射到不同数量的传输块和/或传输块组上，有利于节约资源。
在一种可能的实现方式中，所述至少一个数量与所述通信信道的其他配置参数具有对应关系。例如，所述至少一个数量分别与所述通信信道的DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述至少一个数量分别与所述通信信道的至少一个频域位置/重复周期/变更周期具有对应关系。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从系统消息中获取所述指示信息。
在一种可能的实现方式中，所述通信信道为SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从SC-MCCH中获取所述指示信息。
第六方面，本申请实施例提供了一种通信方法，包括：
基站生成指示信息，所述指示信息用于指示用于承载通信信道传输块和/或传输块组的至少一个数量；
所述基站发送所述指示信息。
通过发送用于承载通信信道的传输块和/或传输块组的数量，使得终端设备能够根据该数量接收组播信息，从而能够降低终端设备在检测组播信息时的功耗。
可选地，所述至少一个数量分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示用于承载具有不同覆盖需求的组播信息的传输块和/或传输块组的数量。这样能够将具有不同覆盖需求的组播信息映射到不同数量的传输块和/或传输块组上，有利于节约资源。
在一种可能的实现方式中，所述通信信道的频域位置与所述通信信道的其他配置参数具有对应关系。例如，所述至少一个数量分别与所述通信信道的DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述至少一个数量分别与所述通信信道的至少一个频域位置/重复周期/变更周期具有对应关系。
在一种可能的实现方式中，所述至少一个数量分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示用于承载具有不同覆盖需求的组播 信息的传输块和/或传输块组的数量。这样能够将具有不同覆盖需求的组播信息映射到不同数量的传输块和/或传输块组上，有利于节约资源。
在一种可能的实现方式中，所述指示信息位于系统消息中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
在一种可能的实现方式中，所述指示信息位于SC-MCCH中，所述通信信道为SC-MTCH。
第七方面，本申请实施例提供了一种通信方法，包括：
终端设备获取指示信息，所述指示信息用于指示组播业务的进程的至少一个数量；
所述终端设备根据所述组播业务的进程的至少一个数量接收基站发送的组播信息，所述组播信息承载在所述通信信道上。
其中，所述组播业务承载在SC-MTCH上。
通过根据组播业务的进程的数量接收组播信息，有利于降低终端设备在检测组播信息时的功耗。
可选地，所述至少一个数量分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的组播业务的进程的数量。
在一种可能的实现方式中，所述组播业务的进程的至少一个数量与所述通信信道的其他配置参数具有对应关系。例如，所述组播业务的进程的至少一个数量分别与所述通信信道的DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述组播业务的进程的至少一个数量与所述通信信道的至少一个频域位置/重复周期/变更周期具有对应关系。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从系统消息中获取所述指示信息。
在一种可能的实现方式中，所述通信信道为SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从SC-MCCH中获取所述指示信息。
第八方面，本发申请提供了一种通信方法，包括：
基站生成指示信息，所述指示信息用于指示组播业务的进程的至少一个数量；
基站发送所述指示信息。
其中，所述组播业务承载在SC-MTCH上。
通过向终端设备发送组播业务的进程的数量，使得终端设备能够根据该数量接收组播信息，有利于降低终端设备在检测组播信息时的功耗。
可选地，所述至少一个数量分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的组播业务的进程的数量。
在一种可能的实现方式中，所述组播业务的进程的至少一个数量与所述通信信道的其他配置参数具有对应关系。例如，所述组播业务的进程的至少一个数量分别与所述通信信道的DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述组播业务的进程的至少一个数量与所述通信信道的至少一个频域位置/重复周期/变更周期具有对应关系。
在一种可能的实现方式中，所述指示信息位于系统消息中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
在一种可能的实现方式中，所述指示信息位于SC-MCCH中，所述通信信道为SC-MTCH。
第九方面，本申请实施例提供了一种通信方法，包括：
终端设备获取指示信息，所述指示信息用于指示通信信道的至少一个重复周期和/或至少一个变更周期，所述至少一个重复周期中的每个重复周期是DCI的周期的整数倍；
所述终端设备根据所述至少一个重复周期和/或至少一个变更周期接收基站发送的组播信息，所述组播信息承载在所述通信信道上。
通过根据用于通信信道的重复周期和/或变更周期接收组播信息，能够提高终端设备的接收效率。
可选地，所述至少一个重复周期和/或至少一个变更周期分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的重复周期和/或变更周期。
在一种可能的实现方式中，所述通信信道的重复周期/变更周期与所述通信信道的其他配置参数具有对应关系。例如，所述通信信道的至少一个重复周期/变更周期分别与所述通信信道的DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述通信信道的至少一个重复周期/变更周期分别与所述通信信道的至少一个频域位置具有对应关系。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从系统消息中获取所述指示信息。
在一种可能的实现方式中，所述通信信道为SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从SC-MCCH中获取所述指示信息。
第十方面，本申请实施例提供了一种通信方法，包括：
基站生成指示信息，所述指示信息用于指示通信信道的至少一个重复周期和/或至少一个变更周期，所述至少一个重复周期中的每个重复周期与DCI的周期之间具有整数倍数关系；
基站发送所述指示信息。
通过发送通信信道的重复周期和/或变更周期，使得终端设备能够根据用于通信信道的重复周期和/或变更周期接收组播信息，从而能够提高终端设备的接收效率。
可选地，所述至少一个重复周期和/或至少一个变更周期分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的重复周期和/或变更周期。
在一种可能的实现方式中，所述通信信道的重复周期/变更周期与所述通信信道的其他配置参数具有对应关系。例如，所述通信信道的至少一个重复周期/变更周期分别与所述通信信道的DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述通信信道的至少一个重复周期/变更周期分别与所述通信信道的至少一个频域位置具有对应关系。
在一种可能的实现方式中，所述指示信息位于系统消息中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
在一种可能的实现方式中，所述指示信息位于SC-MCCH中，所述通信信道为SC-MTCH。
第十一方面，本申请实施例提供了一种通信方法，包括：
终端设备获取指示信息，所述指示信息用于指示通信信道的至少一个重复周期中的每个重复周期相对于DCI的周期的倍数；
所述终端设备根据所述至少一个重复周期中的每个重复周期相对于DCI的周期的倍数接收基站发送的组播信息，所述组播信息承载在所述通信信道上。
其中，所述每个重复周期相对于DCI的周期的倍数可以为整数，也可以为小数。
通过指示重复周期相对于DCI的周期的倍数，能够避免直接指示重复周期，从而能够节省开销，减少用于指示重复周期的比特数。
具体地，所述终端设备根据所述至少一个重复周期中的每个重复周期相对于DCI的周期的倍数接收基站发送的组播信息，包括：
所述终端设备根据所述至少一个重复周期中的每个重复周期相对于DCI的周期的倍数确定所述至少一个重复周期；
所述终端设备根据所述至少一个重复周期接收所述组播信息。
可选地，所述至少一个重复周期分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的重复周期。这样能够为具有不同覆盖需求的组播信息配置不同的重复周期，有利于节约资源。
在一种可能的实现方式中，所述通信信道的重复周期与所述通信信道的其他配置参数具有对应关系。例如，所述通信信道的至少一个重复周期分别与所述通信信道的DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述通信信道的至少一个重复周期分别与所述通信信道的至少一个频域位置具有对应关系。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从系统消息中获取所述指示信息。
在一种可能的实现方式中，所述通信信道为SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从SC-MCCH中获取所述指示信息。
第十二方面，本申请实施例提供了一种通信方法，包括：
基站生成指示信息，所述指示信息用于指示通信信道的至少一个重复周期中的每个重复周期相对于DCI的周期的倍数；
所述基站发送所述指示信息。
其中，所述每个重复周期相对于DCI的周期的倍数可以为整数，也可以为小数。
通过指示重复周期相对于DCI的周期的倍数，能够避免直接指示重复周期，从而能够节省开销，减少用于指示重复周期的比特数。
可选地，所述至少一个重复周期分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的重复周期。这样能够为具有不同覆盖需求的组播信息配置不同的重复周期，有利于节约资源。
在一种可能的实现方式中，所述通信信道的重复周期与所述通信信道的其他配置参数具有对应关系。例如，所述通信信道的至少一个重复周期分别与所述通信信道的DCI的至少一个起始位置/最大重复次数/周期具有对应关系，或者所述通信信道的至少一个重复周期分别与所述通信信道的至少一个频域位置具有对应关系。
在一种可能的实现方式中，所述指示信息位于系统消息中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
在一种可能的实现方式中，所述指示信息位于SC-MCCH中，所述通信信道为SC-MTCH。
第十三方面，本申请实施例提供了一种通信方法，包括：
终端设备获取指示信息，所述指示信息用于指示通信信道的优先级；
所述终端设备根据所述通信信道的优先级接收基站发送的组播信息，所述组播信息承载在所述通信信道上。
其中，所述通信信道的优先级可以为所述通信信道相对于所述终端设备进行接收或发送的其他信道的优先级。
通过根据通信信道的优先级接收组播信息，能够提高终端设备能够接收组播信息的成功率。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从系统消息中获取所述指示信息。
在一种可能的实现方式中，所述通信信道为SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从SC-MCCH中获取所述指示信息。
第十四方面，本申请实施例提供了一种通信方法，包括：
基站生成指示信息，所述指示信息用于指示通信信道的优先级；
所述基站发送所述指示信息。
其中，所述通信信道的优先级可以为所述通信信道相对于终端设备进行接收或发送的其他信道的优先级。
通过发送通信信道的优先级，使得终端设备能够根据该优先级接收组播信息，从而能够提高终端设备接收组播信息的成功率。
在一种可能的实现方式中，所述指示信息位于系统消息中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
在一种可能的实现方式中，所述指示信息位于SC-MCCH中，所述通信信道为SC-MTCH。
第十五方面，本申请实施例提供了一种通信方法，包括：
终端设备接收通信信道的下行控制信息DCI，所述DCI包括指示信息，所述指示信息用于指示用于承载所述通信信道的传输块和/或传输块组的标识。
通过在DCI中携带用于承载通信信道的传输块和/或传输块组的标识，能够使得终端设备获知用于承载通信信道的传输块和/或传输块组的信息，从而能够降低终端设备的功耗。
在一种可能的实施例中，所述指示信息还用于指示用于承载所述通信信道的传输块和/或传输块组的数量。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
第十六方面，本申请实施例提供了一种通信方法，包括：
基站生成通信信道的下行控制信息DCI，所述DCI包括指示信息，所述指示信息用于指示用于承载所述通信信道的传输块和/或传输块组的标识；
基站发送所述下行控制信息DCI。
通过在DCI中携带用于指示用于承载通信信道的传输块和/或传输块组的标识的指示信息，能够使得终端设备获知用于承载通信信道的传输块和/或传输块组，从而能够降低终端设备的功耗。
在一种可能的实施例中，所述指示信息还用于指示用于承载所述通信信道的传输块和/或传输块组的数量。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
第十七方面，提供了一种通信方法，包括：
终端设备获取指示信息，所述指示信息用于指示通信信道的下行控制信息DCI的多个最大重复次数和/或多个周期；
所述终端设备根据所述多个最大重复次数和/或多个周期接收所述DCI。
通过获取DCI的最大重复次数和/或周期，并根据该最大重复次数和/或周期，能够提高检测DCI的效率，从而能够降低终端设备的功耗。
可选地，所述DCI的多个最大重复次数和/或多个周期分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的DCI的最大重复次数和/或周期。
在一种可能的实现方式中，所述DCI的多个最大重复次数/周期与所述通信信道的其他配置参数具有对应关系。例如，所述DCI的多个最大重复次数/周期分别与所述DCI的至少一个起始位置具有对应关系，或者所述DCI的多个最大重复次数/周期与所述通信信道的至少一个频域位置/周期/变更周期具有对应关系。
在一种可能的实现方式中，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从系统消息中获取所述指示信息。
在一种可能的实现方式中，所述通信信道为SC-MTCH，所述终端设备获取指示信息包括：所述终端设备从SC-MCCH中获取所述指示信息。
第十八方面，本申请实施例提供了一种通信方法，包括：
基站生成指示信息，所述指示信息用于指示通信信道的下行控制信息DCI的多个最大重复次数和/或多个周期；
基站发送所述指示信息。
这样能够使得终端设备根据该多个最大重复次数和/或多个周期检测DCI，能够提高终端设备检测DCI的效率，从而能够降低终端设备的功耗。
在一种可能的实现方式中，所述DCI的多个最大重复次数/周期与所述通信信道的其他配置参数具有对应关系。例如，所述DCI的多个最大重复次数/周期分别与所述DCI的至少一个起始位置具有对应关系，或者所述DCI的多个最大重复次数/周期与所述通信信道的至少一个频域位置/周期/变更周期具有对应关系。
在一种可能的实现方式中，所述指示信息位于系统消息中，所述通信信道为SC-MCCH或SC-MTCH。
在一种可能的实现方式中，所述指示信息位于SC-MCCH中，所述通信信道为SC-MTCH。
另一方面，本发明实施例提供了一种通信装置，该装置具有实现上述方法实施例中终端设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相应的模块。
在一个可能的设计中，所述通信装置包括处理器和接收器，所述处理器用于获取指示信息，所述接收器用于根据所获取的指示信息接收消息。
另一方面，本发明实施例提供了另一种通信装置，该装置具有实现上述方法实施例中基站行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相应的模块。
在一个可能的设计中，所述通信装置包括处理器和发射器，所述处理器用于生成指示信息，所述发射器用于根据生成指示信息发送消息。
又一方面，本发明实施例提供了一种通信系统，该系统包括上述方面所述的基站和终端设备；或者，该系统包括上述方面所述的基站和网络实体；或者，该系统包括上述方面所述的基站，终端设备和网络实体。
附图说明
图1是SC-PTM的原理示意图；
图2是现有技术中对DCI进行盲检测的示意图；
图3是根据本发明实施例的通信方法的示意性流程图；
图4是根据本发明另一实施例的通信方法的示意性流程图；
图5是根据本发明另一实施例的通信方法的原理示意图；
图6是根据本发明另一实施例的通信方法的原理示意图；
图7是根据本发明另一实施例的通信方法的原理示意图；
图8是根据本发明实施例的终端设备的结构示意图；
图9是根据本发明另一实施例的终端设备的结构示意图；
图10是根据本发明实施例的基站的终端示意图；
图11是根据本发明实施例的基站的终端示意图。
具体实施方式
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 描述。
本发明实施例可以适用于LTE系统，也可以适用于其他无线通信系统，例如全球移动通信系统(Global System for Mobile Communication，GSM)，移动通信系统(Universal Mobile Telecommunications Systemc，UMTS)，码分多址接入(Code Division Multiple Access，CDMA)系统，以及新的网络系统等。下面以LTE系统为例进行具体实施例的介绍。
本发明实施例涉及的终端设备，可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，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言和/或数据。例如，个人通信业务(PCS，Personal Communication Service)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(WLL，Wireless Local Loop)站、个人数字助理(PDA，Personal Digital Assistant)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、接入点(Access Point)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device)、或用户装备(User Equipment)。
本发明实施例所涉及基站，该基站可用于将收到的空中帧与IP分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)网络。该基站还可协调对空中接口的属性管理。例如，基站可以是全球移动通信系统(Global System for Mobile Communication，GSM)或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)中的基站(NodeB)，还可以是LTE中的演进型基站(eNB或e-NodeB，evolutional Node B)，本发明实施例并不限定。
应理解，在本发明实施例中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系。例如，A和/或B，可以表示：单独存在 A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。应理解，A、B和/或C，即为A和/或B和/或C。
应注意，本发明实施例中，通信信道的配置参数包括但不限于通信信道的DCI的起始位置、通信信道的DCI的最大重复次数、通信信道的DCI的周期、通信信道的频域位置、通信信道的重复周期和通信信道的变更周期。
应理解，通信信道的频域位置可以理解为通信信道自身的频域位置，还可以理解为用于调度该通信信道的DCI的频域位置。
实施例一
图3所示为根据本发明实施例的通信方法300的示意性流程图。如图3所示，方法300包括如下内容。
310、终端设备获取指示信息，指示信息用于指示通信信道的DCI的至少一个起始位置。
可选地，该通信信道可以为组播信道。
通信信道的DCI用于调度承载在通信信道上的组播信息。组播信息可以为SC-MTCH的配置信息，也可以为组播业务数据。若通信信道为SC-MCCH，则SC-MCCH的DCI用于调度承载在SC-MCCH上的SC-MTCH的配置信息；若通信信道为SC-MTCH，则SC-MTCH的DCI用于调度承载在SC-MTCH上的组播业务数据。
应理解，DCI的起始位置指的是时域起始位置。
320、终端设备根据至少一个起始位置接收该DCI。
通过根据DCI的起始位置接收DCI，避免了终端设备对DCI的起始位置进行盲检测，能够节省终端设备的资源开销和耗电量。
可选地，指示信息还用于指示DCI的至少一个周期、至少一个最大重复次数和/或至少一个搜索空间的起始位置。
相应地，步骤310还可以包括：
终端设备根据DCI的至少一个起始位置，以及该DCI的至少一个周期、至少一个最大重复次数和/或至少一个搜索空间的起始位置检测该DCI。
该指示信息可以是预先配置在终端设备中的，也可以是从基站发送的消息中获取到的。若该指示信息是预先配置在终端设备中的，则终端设备可以从存储器中获取该指示信息。
在一些实施例中，如图4所示，通信方法400包括：410、基站生成该指示信息；420、基站发送该指示信息。
例如，基站可以广播的形式发送该指示信息。
相应地，终端设备获取指示信息，包括：终端设备从基站发送的消息中获取该指示信息。
终端设备接收到基站发送的该指示信息之后，可以根据该指示信息指示的通信信道的DCI的至少一个起始位置接收DCI。
在一些实施例中，通信信道为SC-MCCH或SC-MTCH，该指示信息可以位于系统消息中。相应地，步骤310中，终端设备获取指示信息可以包括：
终端设备从系统消息中获取指示信息。
在一些实施例中，通信信道为SC-MTCH，该指示信息可以位于SC-MCCH中。相应地，步骤310中，终端设备获取指示信息可以包括：
终端设备从SC-MCCH中获取指示信息。
由于在实际系统中，不同的组播业务对应不同的覆盖需求。例如，在窄带物联网(Narrow Band Internet of Things，NB-IoT)系统中，对于电表/水表/气表等表类业务的软件升级类组播业务，由于表类的终端设备基本都处于覆盖较差的环境中，因此而其所需的调制与编码策略(Modulation and Coding Scheme，MCS)较为鲁棒，所需的重复次数也会较多；同时，还会有比如路灯开启等应用场景，所需的MCS等级较高，所需的重复次数较少甚至不需要重复。也就是说，具有不同覆盖需求的组播信息对应的DCI的最大重复次数和/或周期不同。例如，覆盖需求越大的组播信息对应的DCI的最大重复次数越多，或者覆盖需求越大的组播信息对应的DCI的周期越长。
在现有技术中，如果这两种业务同时发起组播业务，其组播配置信息需要放到一份SC-MCCH中，MCS和重复次数也需要按照覆盖最差的业务来设定，会造成资源浪费。SC-MTCH中也存在类似的问题。
本发明实施例中，可以为具有不同覆盖需求的组播信息对应的DCI配置不同的配置信息，这样有利于节省资源。
在一些实施例中，指示信息指示的DCI的至少一个起始位置、至少一个周期、至少一个最大重复次数和/或至少一个搜索空间的起始位置可以对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的DCI的起始位置、周期、最大重复次数和/或搜索空间的起 始位置。
这样，可以以不同的覆盖等级发送SC-MCCH或SC-MTCH，不同组播业务的组播配置信息或数据可以依照各自需求放置到相应覆盖等级的SC-MCCH或SC-MTCH中，从而有利于节省资源。
在一些实施例中，DCI的起始位置与通信信道的其他配置参数具有对应关系。其中，该通信信道的其他配置参数可以为通信信道的DCI的最大重复次数、通信信道的DCI的周期、通信信道的频域位置、通信信道的重复周期或通信信道的变更周期。
终端设备可以根据通信信道的其他配置参数和预先配置的对应关系确定DCI的起始位置。在一些实施例中，指示信息可以直接指示DCI的至少一个起始位置，指示信息还可以通过指示通信信道的其他配置参数间接指示DCI的至少一个起始位置。本发明实施例对此不做限定。
实施例二
为了满足广覆盖或深覆盖的需求，NB-IoT传输数据时需要大量重复。这将会导致SC-MCCH在传输时，可能要持续很长的时间，占用较多的资源。对于SC-MCCH的传输，如果只是将其限制在一个载波(如锚点载波)上，会造成该载波上的负载拥堵。本发明实施例能够支持基站根据每个载波的负载情况灵活选择需要将通信信道(SC-MCCH或SC-MTCH)放置在哪一个载波上传输，如图5所示。
不仅如此，SC-MCCH还可支持多载波发送。在一些实施例中，SC-MCCH承载在多个TB内传输，还可以使SC-MCCH在多个载波上传输。例如，可以将SC-MCCH的多个TB放到不同的载波上传输。如图6所示，SC-MCCH承载子3个TB上，3个TB分别映射到不同的载波上进行传输。需要说明的是，图6中仅以一个载波上传输一个TB为例描述，但本发明实施例对此并不限定，一个载波上还可以传输多个TB。
本发明实施例中，通过将组播信息发送到不同的载波上，实现了系统资源的有效利用，能够提高系统容量和吞吐率。
然后，可以将通信信道对应的载波指示给终端设备，这样终端设备就可以去相应的载波上接收组播信息，能够提到终端设备的接收效率。
本发明实施例的提供了一种通信方法。该通信方法包括：
终端设备获取指示信息，指示信息用于指示通信信道的至少一个频域位 置；
终端设备根据至少一个频域位置接收基站发送的组播信息，组播信息承载在该通信信道上。
可以参考实施例一中对组播信息的相关描述，在此不再赘述。
通过根据频域位置接收基站发送的组播信息，能够提高终端设备的接收效率。
与实施例一类似，该指示信息可以是预先配置在终端设备中的，也可以是从基站发送的消息中获取到的。
在一些实施例中，基站生成该指示信息，并发送该指示信息。例如，基站可以广播的形式发送该指示信息。
在一些实施例中，指示信息用于指示通信信道所在的载波的标识。
本发明实施例中，通信信道所在的载波的标识可以有多种表现形式。例如，系统有3个PRB，则该载波的标识可以为0、1、2。应理解，该载波的标识还可以沿用LTE系统中规定的PRB的编号。
可选地，至少一个频域位置分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的频域位置。这样能够为具有不同覆盖需求的组播信息配置不同的频域位置。
其中，具有不同覆盖需求的组播信息对应的DCI的最大重复次数和/或周期不同。例如，覆盖需求越大的组播信息对应的DCI的最大重复次数越多，或者覆盖需求越大的组播信息对应的DCI的周期越长。
在一些实施例中，通信信道的频域位置与通信信道的其他配置参数具有对应关系。其中，该通信信道的其他配置参数可以为通信信道的DCI的起始位置、通信信道的DCI的最大重复次数、通信信道的DCI的周期、通信信道的重复周期或通信信道的变更周期。
终端设备可以根据通信信道的其他配置参数和预先配置的对应关系确定通信信道的频域位置。与实施例一类似，指示信息可以直接或间接指示通信信道的至少一个频域位置。
在一些实施例中，通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，终端设备获取指示信息包括：终端设备从系统消息中获取指示信息。
在一些实施例中，通信信道为SC-MTCH，终端设备获取指示信息包括： 终端设备从SC-MCCH中获取指示信息。
实施例三
如图1所示，SC-MCCH为组播的控制信道，用来指示多个组播进程(session)的配置信息。当系统中同时需要发送的组播业务个数过多时，SC-MCCH里的信息比特数会很大。本发明实施例可以将SC-MCCH中的内容承载在多个传输块(Transport Block，TB)上进行传输，如图7所示。
首先，若SC-MCCH中的内容的比特数超过了系统中一个TB所能承载的最大比特数，则将SC-MCCH中的内容承载在多个TB中进行传输，这样能够支持SC-MCCH配置更多数量的组播业务，从而增强系统的业务能力。
其次，当SC-MCCH中的内容同时指示多个组播session的配置信息时，由于不同组播session面向的用户群不同，因此不同session所需的重复次数不同(如，用户群环境好的session，只需要少量重复或者不重复；用户群环境不好的session，需要大量重复以保证覆盖)，如果将该SC-MCCH中的内容全放到1个TB内，只能按照所有session中所需重复次数最多的重复次数进行发送，造成资源浪费，因此将该SC-MCCH中的seesion承载在多个传输块上，能够避免资源浪费。应注意，可以将一个或多个seesion承载在一个TB上，本发明实施例对此不做限定。
另外，将SC-MCCH中的不同session承载在多个TB上，能够将不同的session放到不同的载波上进行传输，这样能够增强调度的灵活性。
类似地，本发明实施例还可以将SC-MTCH中的内容承载在多个TB上进行传输，在此不再赘述。
然后，可以将通信信道(如SC-MCCH或SC-MTCH)对应的传输块和/或传输块组的数量指示给终端设备，这样终端设备在检测到相应数量的用于承载组播信息的传输块和/或传输块组之后，自动停止继续检测，能够降低终端设备的功耗。
本发明实施例提供了一种通信方法，该通信方法包括：
终端设备获取指示信息，指示信息用于指示用于承载通信信道的传输块和/或传输块组的至少一个数量；
终端设备根据至少一个数量接收基站发送的组播信息，组播信息承载在通信信道上。
可以参考实施例一中对组播信息的相关描述，在此不再赘述。
通过根据用于承载通信信道的传输块和/或传输块组的数量接收组播信息，能够降低终端设备在检测组播信息时的功耗。
与实施例一类似，该指示信息可以是预先配置在终端设备中的，也可以是从基站发送的消息中获取到的。
在一些实施例中，基站生成该指示信息，并发送该指示信息。例如，基站可以广播的形式发送该指示信息。
可选地，至少一个数量分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示用于承载具有不同覆盖需求的组播信息的传输块和/或传输块组的数量。这样能够将具有不同覆盖需求的组播信息映射到不同数量的传输块和/或传输块组上，有利于节约资源。
其中，具有不同覆盖需求的组播信息对应的DCI的最大重复次数和/或周期不同。例如，覆盖需求越大的组播信息对应的DCI的最大重复次数越多，或者覆盖需求越大的组播信息对应的DCI的周期越长。
在一些实施例中，至少一个数量与通信信道的其他配置参数具有对应关系。其中，该通信信道的其他配置参数可以为通信信道的DCI的起始位置、通信信道的DCI的最大重复次数、通信信道的DCI的周期、通信信道的频域位置、通信信道的重复周期或通信信道的变更周期。
终端设备可以根据通信信道的其他配置参数和预先配置的对应关系确定用于承载通信信道的传输块和/或传输块组的数量。与实施例一类似，指示信息可以直接或间接指示用于承载通信信道的传输块和/或传输块组的至少一个数量。
在一些实施例中，通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，终端设备获取指示信息包括：终端设备从系统消息中获取指示信息。
在一些实施例中，通信信道为SC-MTCH，终端设备获取指示信息包括：终端设备从SC-MCCH中获取指示信息。
在一些实施例中，通信信道的DCI中还可以携带用于指示TB和/或TB组的指示信息。该DCI可以是用来调度SC-MCCH的DCI，也可以是用来调度SC-MTCH的DCI。这样能够使得终端设备获知SC-MCCH/SC-MTCH的TB信息，终端设备能够针对性地检测TB和/或TB组，能够进一步降低终端设备的功耗。
实施例四
本发明实施例还提供了一种通信方法，该通信方法包括：
终端设备获取指示信息，指示信息用于指示组播业务的进程的至少一个数量；
终端设备根据组播业务的进程的至少一个数量接收基站发送的组播信息，组播信息承载在通信信道上。
其中，组播业务承载在SC-MTCH上。
可以参考实施例一中对组播信息的相关描述，在此不再赘述。
终端设备获知组播业务的进程的数量之后，如果终端设备检测到该数量的某个组播业务的进程，则终端设备能够确定已经接收完所有的进程，无需继续检测，能够降低终端设备的功耗。
因此，通过根据组播业务的进程的数量接收组播信息，有利于降低终端设备在检测组播信息时的功耗。
与实施例一类似，该指示信息可以是预先配置在终端设备中的，也可以是从基站发送的消息中获取到的。
在一些实施例中，基站生成该指示信息，并发送该指示信息。例如，基站可以广播的形式发送该指示信息。
可选地，至少一个数量分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的组播业务的进程的数量。
其中，具有不同覆盖需求的组播信息对应的DCI的最大重复次数和/或周期不同。例如，覆盖需求越大的组播信息对应的DCI的最大重复次数越多，或者覆盖需求越大的组播信息对应的DCI的周期越长。
在一些实施例中，组播业务的进程的至少一个数量与通信信道的其他配置参数具有对应关系。其中，该通信信道的其他配置参数可以为通信信道的DCI的起始位置、通信信道的DCI的最大重复次数、通信信道的DCI的周期、通信信道的频域位置、通信信道的重复周期或通信信道的变更周期。
终端设备可以根据通信信道的其他配置参数和预先配置的对应关系确定组播业务的进程的数量。与实施例一类似，指示信息可以直接或间接指示组播业务的进程的至少一个数量。
在一些实施例中，通信信道为单小区组播控制信道SC-MCCH或单小区 组播业务信道SC-MTCH，终端设备获取指示信息包括：终端设备从系统消息中获取指示信息。
在一些实施例中，通信信道为SC-MTCH，终端设备获取指示信息包括：终端设备从SC-MCCH中获取指示信息。
实施例五
本发明实施例提供了一种通信方法，该通信方法包括：
终端设备获取指示信息，指示信息用于指示通信信道的至少一个重复周期和/或至少一个变更周期，至少一个重复周期中的每个重复周期是DCI的周期的整数倍；
终端设备根据至少一个重复周期和/或至少一个变更周期接收基站发送的组播信息，组播信息承载在通信信道上。
可以参考实施例一中对组播信息的相关描述，在此不再赘述。
通过根据用于通信信道的重复周期和/或变更周期接收组播信息，能够提高终端设备的接收效率。
与实施例一类似，该指示信息可以是预先配置在终端设备中的，也可以是从基站发送的消息中获取到的。
在一些实施例中，基站生成该指示信息，并发送该指示信息。例如，基站可以广播的形式发送该指示信息。
可选地，至少一个重复周期和/或至少一个变更周期分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对应的重复周期和/或变更周期。
其中，具有不同覆盖需求的组播信息对应的DCI的最大重复次数和/或周期不同。例如，覆盖需求越大的组播信息对应的DCI的最大重复次数越多，或者覆盖需求越大的组播信息对应的DCI的周期越长。
在一些实施例中，通信信道的重复周期/变更周期与通信信道的其他配置参数具有对应关系。其中，该通信信道的其他配置参数可以为通信信道的DCI的起始位置、通信信道的DCI的最大重复次数、通信信道的DCI的周期或通信信道的频域位置。
终端设备可以根据通信信道的其他配置参数和预先配置的对应关系确定通信信道的重复周期/变更周期。与实施例一类似，指示信息可以直接或间接指示通信信道的重复周期/变更周期。
在一些实施例中，通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，终端设备获取指示信息包括：终端设备从系统消息中获取指示信息。
在一些实施例中，通信信道为SC-MTCH，终端设备获取指示信息包括：终端设备从SC-MCCH中获取指示信息。
实施例六
现有技术中，SIB直接将重复周期(Repetition Period，RP)的取值指示出来，比如，现有SIB里，有3比特的域，用来指示RP，可能的取值有：20ms、40ms、80ms、160ms、320ms、640ms、1280ms、2560ms这8个值。
在NB-IoT中，由于需要面对不同的覆盖等级，因此RP的取值可能性会更多，需要更多的比特。而且，一般来讲，覆盖等级越差的业务，其RP越长。但是可以发现，覆盖等级越差的业务，其DCI周期也会越长，而DCI周期是在SIB中会指示的。因此，本发明实施例中通过指示RP相对于DCI的周期的倍数，能够减少用于指示RP的比特数，从而能够节省开销。
本发明实施例提供了一种通信方法，该通信方法包括：
终端设备获取指示信息，指示信息用于指示通信信道的至少一个重复周期中的每个重复周期相对于DCI的周期的倍数；
终端设备根据至少一个重复周期中的每个重复周期相对于DCI的周期的倍数接收基站发送的组播信息，组播信息承载在通信信道上。
具体地，终端设备根据至少一个重复周期中的每个重复周期相对于DCI的周期的倍数确定至少一个重复周期；然后，终端设备根据至少一个重复周期接收该组播信息。
其中，每个重复周期相对于DCI的周期的倍数可以为整数，也可以为小数。
可以参考实施例一中对组播信息的相关描述，在此不再赘述。
通过指示重复周期相对于DCI的周期的倍数，能够避免直接指示重复周期，从而能够节省开销，减少用于指示重复周期的比特数。
与实施例一类似，该指示信息可以是预先配置在终端设备中的，也可以是从基站发送的消息中获取到的。
在一些实施例中，基站生成该指示信息，并发送该指示信息。例如，基站可以广播的形式发送该指示信息。
可以参考实施例五中对至少一个重复周期的相关描述，在此不再赘述。
在一些实施例中，通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，终端设备获取指示信息包括：终端设备从系统消息中获取指示信息。
在一些实施例中，通信信道为SC-MTCH，终端设备获取指示信息包括：终端设备从SC-MCCH中获取指示信息。
实施例七
通信系统中，通常会有组播业务和其他类业务，其他类业务如单播的正常数据业务、寻呼(paging)业务等等。
在NB-IoT中，由于组播业务通常的业务信息量较大，再加上NB-IoT的频率资源受限，因此组播业务在NB-IoT中一般会持续很长的时间，在终端设备接收组播业务期间，可能会有同时发生的其他类业务。在一些实施例中，可以将组播业务的优先级调的低一些。但是对于像paging这种周期性出现的信号来说，正在收组播业务的UE，每隔一段时间就要暂停接收组播业务而转去接收paging，如果这个paging的周期很短的话，那对组播业务是很严重的影响，会导致终端设备总是收不成功该组播业务。
因此，本发明实施例中可以支持基站对组播业务相对于其他类业务的优先级灵活可配置。具体地，可以指示终端设备接收通信信道和其他信道的相对优先级。例如，其他信道可以是paging信道、上行物理随机接入信道(Physical Random Access Channel，PRACH)信道、下行数据信道或上行数据信道等。
比如，可选地，基站在SC-MCCH中，用1比特来指示SC-MTCH和paging信道的相对优先级，0表示UE优先接收SC-MTCH，1表示UE优先接收paging信道，或者反过来。
比如，可选地，基站在系统消息中，用1比特来指示SC-MCCH/SC-MTCH和paging信道的相对优先级，0表示UE优先接收SC-MCCH/SC-MTCH，1表示UE优先接收paging信道，或者反过来。
比如，可选地，基站在SC-MCCH中采用多个比特来分别指示SC-MTCH和多个其他信道的相对优先级。
比如，可选地，基站在系统消息中采用多个比特来分别指示SC-MCCH/SC-MTCH和多个其他信道的相对优先级。
本发明实施例提供了一种通信方法，该通信方法包括：
终端设备获取指示信息，指示信息用于指示通信信道的优先级；
终端设备根据通信信道的优先级接收基站发送的组播信息，组播信息承载在通信信道上。
其中，通信信道的优先级可以为通信信道相对于终端设备能够接收到的其他信道的优先级。
可以参考实施例一中对组播信息的相关描述，在此不再赘述。
通过根据通信信道的优先级接收组播信息，能够提高终端设备能够接收组播信息的成功率。
与实施例一类似，该指示信息可以是预先配置在终端设备中的，也可以是从基站发送的消息中获取到的。
在一些实施例中，基站生成该指示信息，并发送该指示信息。例如，基站可以广播的形式发送该指示信息。
在一些实施例中，通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，终端设备获取指示信息包括：终端设备从系统消息中获取指示信息。
在一些实施例中，通信信道为SC-MTCH，终端设备获取指示信息包括：终端设备从SC-MCCH中获取指示信息。
实施例八
本发明实施例提供了一种通信方法，该通信方法包括：
终端设备获取指示信息，指示信息用于指示通信信道的下行控制信息DCI的多个最大重复次数和/或多个周期；
终端设备根据DCI的多个最大重复次数和/或多个周期接收DCI。
通过获取DCI的最大重复次数和/或周期，并根据该最大重复次数和/或周期，能够提高检测DCI的效率，从而能够降低终端设备的功耗。
与实施例一类似，该指示信息可以是预先配置在终端设备中的，也可以是从基站发送的消息中获取到的。
在一些实施例中，基站生成该指示信息，并发送该指示信息。例如，基站可以广播的形式发送该指示信息。
可选地，DCI的多个最大重复次数和/或多个周期分别对应具有不同覆盖需求的组播信息。换句话说，可以分别指示具有不同覆盖需求的组播信息对 应的DCI的最大重复次数和/或周期。
例如，覆盖需求越大的组播信息对应的DCI的最大重复次数越多，或者覆盖需求越大的组播信息对应的DCI的周期越长。
在一些实施例中，DCI的多个最大重复次数/周期与通信信道的其他配置参数具有对应关系。例如，DCI的多个最大重复次数/周期分别与DCI的多个起始位置具有对应关系，或者DCI的多个最大重复次数/周期与通信信道的多个频域位置/重复周期/变更周期具有对应关系。
在一些实施例中，通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，终端设备获取指示信息包括：终端设备从系统消息中获取指示信息。
在一些实施例中，通信信道为SC-MTCH，终端设备获取指示信息包括：终端设备从SC-MCCH中获取指示信息。
实施例九
本发明实施例提供了一种通信方法，该通信方法包括：
基站发送通信信道的DCI，DCI包括用于指示用于承载通信信道的传输块和/或传输块组的标识的指示信息；
终端设备接收该DCI。
通过在DCI中携带用于承载通信信道的传输块和/或传输块组的标识，能够使得终端设备获知用于承载通信信道的传输块和/或传输块组的信息，从而能够降低终端设备的功耗。
在一种可能的实施例中，指示信息还用于指示用于承载通信信道的传输块和/或传输块组的数量。
在一些实施例中，通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH。
上文描述了根据本发明实施例的通信方法的示意性流程图，下面将结合图8至图11描述根据本发明实施例的终端设备和基站。
图8是根据本发明实施例的终端设备800的结构示意图。如图8所示，终端设备800包括处理单元810和接收单元820。
处理单元810用于获取指示信息。可选地，处理单元810可以用于从存储器中获取预先配置的指示信息，或者处理单元单元810用于从基站发送的消息中获取指示信息。
接收单元820用于根据处理单元810获取到的指示信息接收信号。
在一些实施例中，处理单元810用于获取指示信息，指示信息用于指示通信信道的DCI的至少一个起始位置；接收单元820用于根据处理单元810获取到的至少一个起始位置接收DCI。通过根据DCI的起始位置检测DCI，避免了终端设备对DCI的起始位置进行盲检测，能够节省终端设备的功耗。这里，终端设备800中的各个单元的功能分别为了实现实施例一所述的通信方法的相应流程，为了简洁，在此适当省略了相应内容。
在一些实施例中，处理单元810用于获取指示信息，指示信息用于指示通信信道的至少一个频域位置；接收单元820用于根据处理单元810获取到的至少一个频域位置接收基站发送的组播信息，该组播信息承载在通信信道上。通过将组播信息发送到不同的载波上，实现了系统资源的有效利用，能够提高系统容量和吞吐率。另外，通过根据频域位置接收基站发送的组播信息，能够提高终端设备的接收效率。这里，终端设备800中的各个单元的功能分别为了实现实施例二的通信方法的相应流程，为了简洁，在此适当省略了相应内容。
在一些实施例中，处理单元810用于获取指示信息，指示信息用于指示用于承载通信信道的传输块和/或传输块组的至少一个数量；接收单元820用于根据处理单元810获取到的至少一个数量接收基站发送的组播信息。通过根据用于承载通信信道的传输块和/或传输块组的数量接收组播信息，能够降低终端设备在检测组播信息时的功耗。这里，终端设备800中的各个单元的功能分别为了实现实施例三所述的通信方法的相应流程，为了简洁，在此适当省略了相应内容。
在一些实施例中，处理单元810用于获取指示信息，指示信息用于指示组播业务的进程的至少一个数量；接收单元820用于根据处理单元810获取到的组播业务的进程的至少一个数量接收基站发送的组播信息。通过根据组播业务的进程的数量接收组播信息，有利于降低终端设备在检测组播信息时的功耗。这里，终端设备800中的各个单元的功能分别为了实现实施例四所述的通信方法的相应流程，为了简洁，在此适当省略了相应内容。
在一些实施例中，处理单元810用于获取指示信息，指示信息用于指示通信信道的至少一个重复周期和/或至少一个变更周期，至少一个重复周期中的每个重复周期是DCI的周期的整数倍；接收单元820用于根据处理单元 810获取到的至少一个重复周期和/或至少一个变更周期接收基站发送的组播信息。通过根据用于通信信道的重复周期和/或变更周期接收组播信息，能够提高终端设备的接收效率。这里，终端设备800中的各个单元的功能分别为了实现实施例五所述的通信方法的相应流程，为了简洁，在此适当省略了相应内容。
在一些实施例中，处理单元810用于获取指示信息，指示信息用于指示通信信道的至少一个重复周期中的每个重复周期相对于DCI的周期的倍数；接收单元820用于根据处理单元810获取到的至少一个重复周期中的每个重复周期相对于DCI的周期的倍数接收基站发送的组播信息。通过指示重复周期相对于DCI的周期的倍数，能够避免直接指示重复周期，从而能够节省开销，减少用于指示重复周期的比特数。这里，终端设备800中的各个单元的功能分别为了实现实施例六所述的通信方法的相应流程，为了简洁，在此适当省略了相应内容。
在一些实施例中，处理单元810用于获取指示信息，指示信息用于指示通信信道的优先级；接收单元820用于根据处理单元810获取到的通信信道的优先级接收基站发送的组播信息。通过根据通信信道的优先级接收组播信息，能够提高终端设备能够接收组播信息的成功率。这里，终端设备800中的各个单元的功能分别为了实现实施例七所述的通信方法的相应流程，为了简洁，在此适当省略了相应内容。
在一些实施例中，处理单元810用于获取指示信息，指示信息用于指示通信信道的下行控制信息DCI的多个最大重复次数和/或多个周期；接收单元820用于根据处理单元810获取到的DCI的多个最大重复次数和/或多个周期接收DCI。通过在DCI中携带用于承载通信信道的传输块和/或传输块组的标识，能够使得终端设备获知用于承载通信信道的传输块和/或传输块组的信息，从而能够降低终端设备的功耗。这里，终端设备800中的各个单元的功能分别为了实现实施例八所述的通信方法的相应流程，为了简洁，在此适当省略了相应内容。
应注意，处理单元810可以由处理器实现，接收单元820可以由接收器实现。图9所示为根据本发明另一实施例的终端设备900的结构示意图。如图9所示，终端设备900包括处理器910、接收器920、存储器930和总线系统940，处理器910、接收器920和存储器930通过总线系统940相连， 其中，存储器930可以用于存储处理器910执行的代码等。接收器920用于在处理器910的控制下接收信号。
终端设备900可对应于实施例一至实施例八中任一实施例所述的通信方法中的终端设备，以及根据本发明实施例的终端设备800，为了简洁，在此不再赘述。
本发明实施例还提供了另一种终端设备，该终端设备包括：接收单元，用于接收DCI，该DCI包括指示信息，该指示信息用于指示用于承载通信信道的传输块和/或传输块组的标识。通过获取DCI的最大重复次数和/或周期，并根据该最大重复次数和/或周期，能够提高检测DCI的效率，从而能够降低终端设备的功耗。应理解，该终端设备对应于实施例九所述的通信方法中的终端设备，为了简洁，在此不再赘述。
应注意，该接收单元可以由接收器实现。本发明实施例还提供了另一种终端设备，该终端设备包括：接收器，用于接收DCI，该DCI包括指示信息，该指示信息用于指示用于承载通信信道的传输块和/或传输块组的标识。应理解，该终端设备还可以包括其他单元或模块，具体可以参考图9所示终端设备的相关描述，在此适当省略相应的内容。
图10是根据本发明实施例的基站1000的结构示意图。如图10所示，基站1000包括处理单元1010和发送单元1020。
具体地，处理单元1010可以用于生成实施例一至实施例九中的任一实施例的信息。
发送单元1020可以用于发送处理单元1010生成的信息。
在一些实施例中，处理单元1020生成指示信息。
可选地，该指示信息可以用于指示通信信道的DCI的至少一个起始位置。通过发送通信信道的DCI的起始位置，使得终端设备能够根据DCI的起始位置检测DCI，避免了终端设备对DCI的起始位置进行盲检测，从而能够节省终端设备的功耗。
可选地，该指示信息可以用于指示通信信道的至少一个频域位置。通过发送通信信道的至少一个频域位置接收基站发送的组播信息，使得能够避免终端设备对通信信道的频域位置进行盲检测，从而能够节省终端设备的资源开销和耗电量。
可选地，该指示信息可以用于指示用于承载通信信道的传输块和/或传输 块组的至少一个数量。通过发送用于承载通信信道的传输块和/或传输块组的数量，使得终端设备能够根据该数量接收组播信息，从而能够降低终端设备在检测组播信息时的功耗。
可选地，该指示信息可以用于指示组播业务的进程的至少一个数量。通过向终端设备发送组播业务的进程的数量，使得终端设备能够根据该数量接收组播信息，有利于降低终端设备在检测组播信息时的功耗。
可选地，该指示信息可以用于指示通信信道的至少一个重复周期和/或至少一个变更周期。通过发送通信信道的重复周期和/或变更周期，使得终端设备能够根据用于通信信道的重复周期和/或变更周期接收组播信息，从而能够提高终端设备的接收效率。
可选地，该指示信息可以用于指示通信信道的至少一个重复周期中的每个重复周期相对于DCI的周期的倍数。通过指示重复周期相对于DCI的周期的倍数，能够避免直接指示重复周期，从而能够节省开销，减少用于指示重复周期的比特数。
可选地，该指示信息可以用于指示通信信道的优先级。通过发送通信信道的优先级，使得终端设备能够根据该优先级接收组播信息，从而能够提高终端设备接收组播信息的成功率。
可选地，该指示信息可以用于指示通信信道的DCI的多个最大重复次数和/或多个周期。这样能够使得终端设备根据该多个最大重复次数和/或多个周期检测DCI，能够提高终端设备检测DCI的效率，从而能够降低终端设备的功耗。
可选地，处理单元1020还可以生成DCI，该DCI包括用于指示用于承载所述通信信道的传输块和/或传输块组的标识的指示信息。通过在DCI中携带用于指示用于承载通信信道的传输块和/或传输块组的标识的指示信息，能够使得终端设备获知用于承载通信信道的传输块和/或传输块组，从而能够降低终端设备的功耗。
应理解，基站1000可对应于上文实施例一至实施例九中任一实施例所述的通信方法中的基站，为避免重复，这里不再赘述。
应注意，处理单元1010可以由处理器实现，发送单元1020可以由发送器实现。
图11是根据本发明另一实施例的基站1100的结构示意图。如图11所 示，终端设备1100包括处理器1110、发送器1120、存储器1130和总线系统1140，处理器1110、发送器1120和存储器1130通过总线系统1140相连，其中，存储器1130可以用于存储处理器1110执行的代码等。发送器1120用于在处理器1110的控制下发送信号。
基站1100可对应于实施例一至实施例九中任一实施例所述的通信方法中的基站，以及根据本发明实施例的基站1000，为了简洁，在此不再赘述。
需要说明的是，以上各实施例中的总线系统除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线。为便于表示，在图中将各种总线都标为总线系统。
以上各实施例中的存储器可以包括易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；存储器也可以包括非易失性存储器(non-volatile memory)，例如快闪存储器(flash memory)、硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；存储器还可以包括上述种类的存储器的组合。
以上各实施例中的处理器可以是中央处理器(central processing unit，CPU)、网络处理器(network processor，NP)或者CPU和NP的组合。处理器还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)、可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)、现场可编程逻辑门阵列(field-programmable gate array，FPGA)、通用阵列逻辑(generic array logic，GAL)或其任意组合。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对 应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，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系统，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。
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。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到本发明可以用硬件实现，或固件实现，或它们的组合方式来实现。当使用软件实现时，可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如，如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(英文Digital Subscriber Line，简称DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的，那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本发明所使用的，盘(Disk)和碟(disc)包括压缩光碟(CD)、激光碟、光 碟、数字通用光碟(DVD)、软盘和蓝光光碟，其中盘通常磁性的复制数据，而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之，以上仅为本发明技术方案的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (16)

  1. 一种通信方法，其特征在于，包括：
    终端设备获取指示信息，所述指示信息用于指示通信信道的下行控制信息DCI的至少一个起始位置；
    所述终端设备根据所述至少一个起始位置接收所述DCI。
  2. 根据权利要求1所述的方法，其特征在于，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，
    所述终端设备获取指示信息包括：
    所述终端设备从系统消息中获取所述指示信息。
  3. 根据权利要求1所述的方法，其特征在于，所述通信信道为SC-MTCH，
    所述终端设备获取指示信息包括：
    所述终端设备从SC-MCCH中获取所述指示信息。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述指示信息还用于指示DCI的至少一个周期、至少一个最大重复次数和/或至少一个搜索空间的起始位置。
  5. 一种通信方法，其特征在于，包括：
    基站生成指示信息，所述指示信息用于指示通信信道的下行控制信息DCI的至少一个起始位置；
    所述基站发送所述指示信息。
  6. 根据权利要求5所述的方法，其特征在于，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述指示信息位于系统消息中。
  7. 根据权利要求5所述的方法，其特征在于，所述通信信道为SC-MTCH，所述指示信息位于SC-MCCH中。
  8. 根据权利要求5至7中任一项所述的方法，其特征在于，所述指示信息还用于指示DCI的至少一个周期、至少一个最大重复次数和/或至少一个搜索空间的起始位置。
  9. 一种终端设备，其特征在于，包括：
    处理单元，用于获取指示信息，所述指示信息用于指示通信信道的下行 控制信息DCI的至少一个起始位置；
    接收单元，用于根据所述处理单元确定的所述至少一个起始位置接收所述DCI。
  10. 根据权利要求9所述的终端设备，其特征在于，
    所述处理单元具体用于当所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH时，从系统消息中获取所述指示信息。
  11. 根据权利要求9所述的终端设备，其特征在于，
    所述处理单元具体用于当所述通信信道为SC-MTCH时，从SC-MCCH中获取所述指示信息。
  12. 根据权利要求9至11中任一项所述的终端设备，其特征在于，所述指示信息还用于指示DCI的至少一个周期、至少一个最大重复次数和/或至少一个搜索空间的起始位置。
  13. 一种基站，其特征在于，包括：
    处理单元，用于生成指示信息，所述指示信息用于指示通信信道的下行控制信息DCI的至少一个起始位置；
    发送单元，用于发送所述处理单元生成的所述指示信息。
  14. 根据权利要求13所述的基站，其特征在于，所述通信信道为单小区组播控制信道SC-MCCH或单小区组播业务信道SC-MTCH，所述指示信息位于系统消息中。
  15. 根据权利要求13所述的基站，其特征在于，所述通信信道为SC-MTCH，所述指示信息位于SC-MCCH中。
  16. 根据权利要求13至15中任一项所述的基站，其特征在于，所述指示信息还用于指示DCI的至少一个周期、至少一个最大重复次数和/或至少一个搜索空间的起始位置。
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