WO2018035816A1 - 传输数据的方法、终端设备和基站 - Google Patents

传输数据的方法、终端设备和基站 Download PDF

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Publication number
WO2018035816A1
WO2018035816A1 PCT/CN2016/096764 CN2016096764W WO2018035816A1 WO 2018035816 A1 WO2018035816 A1 WO 2018035816A1 CN 2016096764 W CN2016096764 W CN 2016096764W WO 2018035816 A1 WO2018035816 A1 WO 2018035816A1
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WIPO (PCT)
Prior art keywords
information
terminal device
base station
scheduling information
search space
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PCT/CN2016/096764
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English (en)
French (fr)
Inventor
王宏
李秉肇
陈力
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华为技术有限公司
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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 CN201680088698.4A priority Critical patent/CN109644322A/zh
Priority to PCT/CN2016/096764 priority patent/WO2018035816A1/zh
Publication of WO2018035816A1 publication Critical patent/WO2018035816A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • the present invention relates to the field of data transmission, and more particularly to a method, a terminal device and a base station for transmitting data.
  • LTE MTC Long Term Evolution
  • LTE MTC does not pursue data transmission rate, multi-band, multi-antenna, full-duplex transmission. Rather, it pursues a longer terminal device time and a lower cost of the terminal device, that is, the terminal is required to achieve low power consumption and low cost.
  • MTC only supports unicast communication, that is, each terminal needs to establish a communication connection with the base station. With a large number of deployed MTC terminals, the base station will face a large number of terminal connections and a large amount of resource consumption. This is undoubtedly a great challenge for the entire communication system.
  • SC-PTM single cell point-to-multipoint
  • the SC-PTM technology does not require the terminal to establish a connection, thereby reducing resource consumption and greatly reducing the burden on the network.
  • the base station when the base station sends the multicast service (for example, the multicast service through the SC-PTM) to the terminal, the base station first needs to send the control information and the scheduling information for transmitting the multicast service data to the terminal device.
  • the scheduling information is carried by a Physical Downlink Control Channel (PDCCH).
  • the terminal device receives the scheduling information by detecting the PDCCH.
  • the common search space and the dedicated search space are divided in the prior art. For different scheduling information, the terminal searches in different search spaces.
  • the terminal capability in LTE is strong, and the two search spaces can be searched at the same time to receive control information and scheduling information of the multicast service data. Further, the multicast service data is received based on the control information and the scheduling information.
  • the MTC UEs due to their limited capabilities, it is not possible to search both search spaces at the same time. In turn, the MTC UE receives the scheduling information of the multicast service data. Therefore, the MTC UE cannot receive multicast service data.
  • the application provides a method for transmitting data, so that the terminal device can receive the number of multicast services. according to.
  • the present application provides a method for transmitting data, where the method includes: receiving, by a terminal device, first scheduling information sent by a base station, where the first scheduling information is used by a base station to schedule transmission of multicast service data, where the first scheduling information is used. Mapping to the first search space or the second search space, the first search space is used to carry the common control information, the second search space is used to carry the control information for the terminal device, and the terminal device receives the base station according to the first scheduling information. Multicast service data sent.
  • the terminal device receives the first scheduling information sent by the base station, where the terminal device receives the first control information sent by the base station, where the first control information carries time information and/or a frequency information, where the time information is used to indicate a subframe that carries the first scheduling information, where the frequency information is used to indicate a frequency band used by the base station to send the first scheduling information;
  • the time information and/or frequency information receives the first scheduling information sent by the base station.
  • the first scheduling information is mapped to the first search space
  • the first control information includes first time information
  • the terminal device receives first scheduling information sent by the base station
  • the terminal device monitors the first search space on a subframe indicated by the first time information, and receives the first scheduling information sent by the base station.
  • the terminal device is in a connected state.
  • the terminal device always searches for the first search space when it is in the idle state. Therefore, in a case where the base station maps the first scheduling information to the first search space, the terminal device may receive the first scheduling information sent by the base station when in the idle state.
  • the terminal device monitors the first search space in the subframe indicated by the first time information in the process of searching for the second search space according to the first time information in the first control information. And receiving the first scheduling information sent by the first base station.
  • the first control information further includes first frequency information, where the first frequency information is used to indicate the first frequency band, and the terminal device receives the first scheduling information sent by the base station, including The terminal device monitors the first search space on the first frequency band, and receives the first scheduling information sent by the base station.
  • the method further includes: the terminal device starting the first timer, And monitoring the first search space during the running of the first timer; after the first timer expires, the terminal device searches for the second search space.
  • the first scheduling information is mapped to the second search space
  • the first control information includes the second time information
  • the terminal device receives the first scheduling information sent by the base station, including: The terminal device monitors the second search space on a subframe indicated by the second time information, and receives the first scheduling information sent by the base station.
  • the terminal device is in an idle state.
  • the base station maps the first scheduling information to the first search space
  • the base station maps the first scheduling information to the second search space
  • the terminal device since the terminal device can search for the dedicated search space when in the connected state, The first scheduling information sent by the base station may be received.
  • the second search space is monitored on the subframe indicated by the second time information in the process of searching for the first search space, so that the first scheduling sent by the base station can be received. information.
  • the first control information further includes second frequency information, where the second frequency information is used to indicate the second frequency band, and the terminal device receives the first scheduling information sent by the base station, including: The terminal device monitors the second search space on the second frequency band, and receives first scheduling information sent by the base station.
  • the method further includes: the terminal device starting a second timer, And monitoring the second search space during the running of the second timer; after the second timer expires, the terminal device searches for the first search space.
  • the terminal device receives the first control information sent by the base station, where the terminal device receives the system message sent by the base station, where the system message includes third time information, where The third time information is used to indicate a subframe that carries the second scheduling information, where the second scheduling information is used by the base station to schedule the sending of the first control information, and the second scheduling information is mapped to the first search space;
  • the terminal device receives the second scheduling information in a subframe indicated by the third time information; the terminal device receives the first control information according to the second scheduling information.
  • the system message further includes third frequency information, where the third frequency information is used to indicate a third frequency band used by the base station to send the second scheduling information, where the terminal
  • the receiving, by the device, the second scheduling information sent by the base station includes: the terminal device receiving, by using the second frequency band, the second scheduling information that is sent by the base station.
  • the first search space is a common search space
  • the second search space is empty.
  • the present application provides a method for transmitting data, where the method includes: the base station sends first scheduling information to the terminal device, where the first scheduling information is used by the scheduling terminal device to receive the multicast service data, where the first scheduling information is mapped to the first a search space or a second search space, wherein the first search space is used to carry common control information, the second search space is used to carry control information for the terminal device, and the base station sends the multicast service data to the terminal device.
  • the sending, by the base station, the first scheduling information to the terminal device includes: the base station sending, to the terminal device, first control information, where the first control information is used by the base station to control Transmitting the first scheduling information, where the first control information includes time information and/or frequency information, where the time information is used to indicate a subframe that carries the first scheduling information, where the frequency information is used to indicate a frequency band used by the base station to send the first scheduling information; the base station sending the first scheduling information to the terminal device.
  • the first scheduling information is mapped to the first search space
  • the first control information includes first time information
  • the base station sends first scheduling information to the terminal device.
  • the base station sends the first scheduling information to the terminal device in a subframe indicated by the first time information.
  • the first control information includes first frequency information, where the first frequency information is used to indicate a first frequency band, and the base station sends first scheduling information to the terminal device, including The base station sends the first scheduling information to the terminal device on the first frequency band.
  • the first scheduling information is mapped to the second search space
  • the first control information includes second time information
  • the base station sends the first scheduling information to the terminal device.
  • the base station sends the first scheduling information to the terminal device in a subframe indicated by the second time information.
  • the first control information further includes second frequency information, where the second frequency information is used to indicate the second frequency band, and the base station sends the first scheduling information to the terminal device, The base station sends the first scheduling information to the terminal device on the second frequency band.
  • the sending, by the base station, the first control information to the terminal device includes: the base station sending a system message to the terminal device, where the system message includes third time information, where The third time information is used to indicate a subframe that carries the second scheduling information, where the The second scheduling information is used by the base station to schedule the sending of the first control information, where the second scheduling information is mapped to the first search space; the base station is to the subframe indicated by the third time information
  • the terminal device sends the second scheduling information; the base station sends the first control information to the terminal device.
  • the system message includes third frequency information, where the third frequency information is used to indicate a third frequency band used by the base station to send the second scheduling information, where the base station is Sending second scheduling information to the terminal device on the third frequency band.
  • the present application provides a terminal device for performing the method in the first aspect or any possible implementation manner of the first aspect.
  • the terminal device comprises means for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • the application provides a base station for performing the method in any of the possible implementations of the second aspect or the second aspect.
  • the base station comprises means for performing the method of any of the second aspect or any of the possible implementations of the second aspect.
  • the present application provides a terminal device including one or more processors, one or more memories, one or more transceivers (each transceiver including a transmitter and a receiver), and The bus is connected.
  • the transmitter or receiver is coupled to one or more antennas and transmits and receives signals through the antenna.
  • the memory is used to store computer program instructions (or code).
  • the processor is operative to execute instructions stored in the memory, and when the instructions are executed, the processor performs the method of the first aspect or any of the possible implementations of the first aspect.
  • the present application provides a base station including one or more processors, one or more memories, one or more transceivers (each transceiver including a transmitter and a receiver), and through a bus phase connection.
  • the transmitter or receiver is coupled to one or more antennas and transmits and receives signals through the antenna.
  • the memory is used to store computer program instructions (or code).
  • the processor is operative to execute instructions stored in the memory, and when the instructions are executed, the processor performs the method of the second aspect or any of the possible implementations of the second aspect.
  • the application provides a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • the present application provides a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of any of the second aspect or any of the possible implementations of the second aspect.
  • the base station receives the scheduling information of the multicast service data by receiving the terminal device. (ie, the first scheduling information) is mapped to the first search space or the second search space, and the first scheduling information is sent to the terminal device, so that the terminal device can receive the first scheduling information. Therefore, the terminal device can receive the multicast service data according to the first scheduling information.
  • FIG. 1 shows a system architecture diagram suitable for use in an embodiment of the present invention.
  • FIG. 2 shows a schematic flow chart of transmitting data according to an embodiment of the present invention.
  • FIG. 3 illustrates a schematic diagram of DCI mapping to a search space, in accordance with an embodiment of the present invention.
  • FIG. 4 shows a schematic diagram of a method of transmitting data in accordance with an embodiment of the present invention.
  • FIG. 5 shows a schematic diagram of a method of transmitting data according to another embodiment of the present invention.
  • FIG. 6 shows a schematic diagram of DCI mapping to a search space in accordance with another embodiment of the present invention.
  • FIG. 7 shows a schematic diagram of a method of transmitting data in accordance with an embodiment of the present invention.
  • FIG. 8 is a schematic diagram showing a correspondence between a narrowband and a G-RNTI according to an embodiment of the present invention.
  • FIG. 9 shows a schematic diagram of a method of transmitting data according to another embodiment of the present invention.
  • FIG. 10 shows a schematic diagram of a method of transmitting data according to still another embodiment of the present invention.
  • FIG. 11 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present invention.
  • FIG. 12 shows a schematic block diagram of a base station 700 in accordance with an embodiment of the present invention.
  • FIG. 13 shows a schematic structural diagram of a terminal device 800 according to an embodiment of the present invention.
  • FIG. 14 shows a schematic structural diagram of a base station 900 according to an embodiment of the present invention.
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WIMAX Worldwide Interoperability for Microwave Access
  • the terminal device may also be referred to as a User Equipment (UE), a Terminal (Terminal), a mobile user equipment, and the like.
  • Communication with one or more core networks may be via a radio access network (e.g., Radio Access Network, RAN).
  • the terminal device may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket, handheld, computer built-in or in-vehicle mobile device that is wireless with The access network exchanges languages and/or data.
  • the terminal device includes a mobile phone, a smart terminal (a wearable device, a smart watch, a smart meter, a smart water meter, etc.), a multimedia device, a streaming media device, and the like.
  • the terminal device in the embodiment of the present invention may also be a terminal device in the MTC.
  • the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a Base Station (NodeB, NB) in WCDMA. It may also be an evolved base station (Evolutional Node B, ENB or e-NodeB) in LTE or a data transceiver node on the network side in a future communication system (for example, 5G).
  • BTS Base Transceiver Station
  • NodeB Base Station
  • NB Base Station
  • Evolutional Node B, ENB or e-NodeB evolved base station
  • LTE Long Term Evolutional Node B
  • 5G future communication system
  • the embodiment of the invention is not particularly limited. For convenience of description, the following embodiments are described by taking the base station as an e-NodeB as an example.
  • Multicast service data that is, Multimedia Broadcast Multicast Service (MBMS) data.
  • MBMS Multimedia Broadcast Multicast Service
  • 3GPP 3rd Generation Partnership Project
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • the MBMS service is a technology for transmitting data from one data source to a plurality of target mobile terminals.
  • the sharing of resources on the network side including the core network and the access network
  • the utilization of network resources especially air interface resources
  • the terminal device In the LTE system, the terminal device is notified that a certain MBMS service is to be changed (for example, a session start, a service bearer update, or a session stop, etc.), and may be sent on the PDCCH first.
  • Downlink Control Information DCI
  • MBMS Radio Network Temporary Identity MBMS RNTI
  • the terminal further reads an MBMS Control Channel (MCCH) message according to related information in the DCI.
  • Specific service configuration parameters such as service ID, physical layer configuration parameters, etc., will be sent on the MCCH channel.
  • PDCCH is the core of system resource allocation and control information scheduling.
  • the terminal generally does not know what information is currently transmitted by the PDCCH, and does not know where the information is needed. But the terminal usually knows what information it is expecting. For example, when the terminal is in an idle state (ie, IDLE state), the expected information is a paging message and a system message. After initiating random access, a random access response message is expected. When there is uplink data waiting to be transmitted, the expected information is an uplink grant message or the like. For different expected information, the terminal uses the corresponding RNTI to check with the CCE information. If the verification is successful, the terminal knows that this information is what you need. It is also possible to further know the DCI format, demodulation method, and the like of this information, thereby solving the content of the DCI. This process is also referred to as blind detection of the PDCCH.
  • the basic unit carrying the PDCCH is a Control Channel Element (CCE).
  • CCE Control Channel Element
  • Each CCE includes 9 Resource Element Groups (REGs), and each resource element group includes 4 Resource Elements (REs).
  • REGs Resource Element Groups
  • REs Resource Elements
  • search space In order to reduce the complexity of blind detection by the terminal.
  • the concept of search space is defined in the existing protocol, and the Common Search Space (CSS) and the UE-specific Search Space (USS) are defined.
  • CSS Common Search Space
  • USS UE-specific Search Space
  • the common search space refers to the space that all terminals need to monitor. It is usually used to send paging, random access response (RAR), system messages, and uplink power control messages of terminals. It can also be said that the scheduling information of these pieces of information is mapped to the common search space.
  • RAR random access response
  • the dedicated search space of the terminal is information indicating a terminal, and does not require all terminal monitoring. It can also be said that the scheduling information of these pieces of information is mapped to the dedicated search space of the terminal.
  • the dedicated search space maps scheduling information of at least one terminal device.
  • the scheduling information of the plurality of terminal devices may overlap the resources in the dedicated search space.
  • the dedicated search space may include multiple CCEs for carrying control information or scheduling information of the at least one terminal device, and when there are multiple terminal devices, carrying control information of at least two terminal devices or CCE for scheduling information Can be the same or different.
  • FIG. 1 shows a system architecture diagram in accordance with an embodiment of the present invention.
  • the system includes a base station 101, a terminal device 102, and a terminal device device 103.
  • the terminal device 102 and the terminal device 103 are within the coverage of the base station 101 and perform multicast communication with the base station 101. That is, the base station 101 simultaneously transmits multicast service data to the terminal device 102 and the terminal device 103.
  • the base station 101 transmits multicast service data to two terminal devices (ie, the terminal device 102 and the terminal device 103) as an example.
  • the terminal device 102 transmits multicast service data to two terminal devices (ie, the terminal device 102 and the terminal device 103) as an example.
  • the embodiment of the present invention does not have any limitation on the number of terminal devices.
  • the PDCCH may also be referred to as an MPDCCH, that is, a PDCCH for the MTC.
  • FIG. 2 shows a schematic flow chart of transmitting data according to an embodiment of the present invention. As shown in FIG. 2, the method mainly includes steps 210 and 220.
  • the terminal device receives first scheduling information sent by the base station.
  • the first scheduling information is mapped to the first search space or the second search space.
  • the first search space is for carrying common control information
  • the second search space is for carrying control information for the terminal device.
  • the first scheduling information is used by the base station to schedule multicast service data sent to the terminal.
  • the terminal device can receive the multicast service data sent by the base station according to the first scheduling information.
  • the terminal device receives, by the base station, the first scheduling information, including:
  • the terminal device receives the first control information sent by the base station, where the first control information carries time information or frequency information, where the time information is used to indicate a subframe that carries the first scheduling information when the base station sends the first scheduling information, and the frequency information is used. Indicating a frequency band used by the base station to send the first scheduling information;
  • the terminal device receives the first scheduling information sent by the base station according to the time information or the frequency information.
  • the first control information may be sent to the terminal device.
  • the first control information is used to control the first scheduling information. send.
  • the terminal device receives the first control information sent by the base station, and can obtain the control information that the base station sends the first scheduling information.
  • the first control information may include configuration information of the first scheduling information, where the configuration information includes indication information of a time-frequency resource used by the base station to send the first scheduling information.
  • the terminal device may receive the first scheduling information that is subsequently sent by the base station according to the configuration information of the first scheduling information.
  • the first scheduling information may be mapped to the first search space (ie, case 1) or the second search space (ie, case 2).
  • first search space ie, case 1
  • second search space ie, case 2
  • First scheduling information is mapped to the first search space
  • the first scheduling information is mapped to the first search space, where the first control information includes first time information, where the first time information is used to indicate that the base station carries the first scheduling information when sending the first scheduling information.
  • Subframe
  • the terminal device And receiving, by the terminal device, the first scheduling information sent by the base station, including:
  • the terminal device monitors the first search space on the subframe indicated by the first time information to receive the first scheduling information sent by the base station.
  • the terminal device monitors the first search space on the subframe indicated by the first time information to receive the first scheduling information.
  • the terminal device searches for the common search space CSS in the idle state and searches for the dedicated search space USS in the connected state. Since the CSS and the USS cannot be searched simultaneously in the connected state, the scheduling information for scheduling the multicast service data sent by the base station is not received, and thus the multicast service data sent by the base station cannot be received.
  • the base station when the base station maps the first scheduling information to the common search space, the base station first sends the first control information to the terminal device, and in the first control information, instructs the terminal device to send the first The subframe in which the first scheduling information is carried when the information is scheduled.
  • the terminal device in the connected state can monitor the common search space on the subframe indicated by the first time information, and can receive the first scheduling information sent by the base station, and further Receiving multicast service data sent by the base station.
  • the first control information includes first frequency information, where the first frequency information is used to indicate a first frequency band used by the base station to send the first scheduling information;
  • the terminal device And receiving, by the terminal device, the first scheduling information sent by the base station, including:
  • the terminal device monitors the first search space on the first frequency band, and receives the first scheduling information sent by the base station.
  • the base station may also indicate, in the first control information, the frequency band used when transmitting the first scheduling information to the terminal device. In this way, when the terminal device is in the connected state, in the process of searching for the dedicated search space, the public search space is searched in the first frequency band, thereby receiving the first scheduling information sent by the base station.
  • the first time information and the first frequency information may be included in the first control information.
  • the terminal device in the connected state searches the common search space on the subframe indicated by the first time information and the frequency band indicated by the first frequency information, to receive the first scheduling information sent by the base station.
  • the frequency band may be a narrow band composed of six consecutive physical resource blocks (PRBs).
  • PRBs physical resource blocks
  • the system bandwidth 50 PRBs are divided into 8 narrowbands, the 1st and the last 1 PRB are spare, the 2nd to 7th PRBs are the first narrowband, the 8th to 13th are the second narrowband, and so on.
  • These narrowbands can be indexed in a split order, which can be indicated using an index value.
  • the frequency band may also include a plurality of narrow bands.
  • First scheduling information is mapped to the second search space
  • the first scheduling information is mapped to the second search space, where the first control information includes second time information,
  • the terminal device And receiving, by the terminal device, the first scheduling information sent by the base station, including:
  • the terminal device monitors the second search space on the subframe indicated by the second time information, and receives the first scheduling information sent by the base station.
  • the terminal device searches for the common search space CSS in the idle state and searches for the dedicated search space USS in the connected state. Therefore, in the case that the base station maps the first scheduling information to the second search space, since the second search space can be monitored when the terminal device is in the connected state, the first scheduling information can be received.
  • the base station when the terminal device is in the idle state, the base station indicates, by using the first control information, the subframe that carries the first scheduling information to the terminal device. Thereby, the terminal device in the idle state can monitor the second search space on the subframe indicated by the base station to receive the first scheduling information.
  • the first control information includes second frequency information, where the second frequency information is used to indicate a second frequency band used by the base station to send the first scheduling information.
  • the terminal device And receiving, by the terminal device, the first scheduling information sent by the base station, including:
  • the terminal device monitors the second search space on the second frequency band, and receives the first scheduling information sent by the base station.
  • the base station may also indicate, by using the first control information, the second frequency band used when transmitting the first scheduling information to the terminal device. In this way, the terminal device monitors the second search space on the second frequency band, so that the first scheduling information sent by the base station can be received.
  • the second time information and the second frequency information may be included in the first control information.
  • the terminal device receives the first scheduling information on the subframe indicated by the second time information and the frequency band indicated by the second frequency information according to the second time information and the second frequency information.
  • the base station searches for the search space mapped with the first scheduling information by indicating that the terminal device searches for the search space with the first scheduling information at a specified time and frequency band (for example, in the MTC).
  • the first scheduling information may further receive the multicast service data sent by the base station according to the first scheduling information.
  • the terminal device receives the first control information sent by the base station, including:
  • the terminal device receives the system message sent by the base station, where the system message includes the third time information, the third time information is used to indicate the subframe that carries the second scheduling information, and the second scheduling information is used by the base station to schedule the sending of the first control information.
  • the terminal device receives the second scheduling information on the subframe indicated by the third time information, where the second scheduling information is mapped to the first search space;
  • the terminal device receives the first control information according to the second scheduling information.
  • the terminal device when receiving the first control information, may first receive the system message sent by the base station, the system message may indicate that the terminal device receives the second scheduling information, and the second scheduling information is used by the base station to schedule the first control. The transmission of information. After receiving the second scheduling information, the terminal device receives the first control information according to the second scheduling information.
  • the system message may carry third time information indicating a subframe that carries the second scheduling information.
  • the system message may further include third frequency information indicating a frequency band used by the base station to send the second scheduling information.
  • the terminal device searches for the first search space on the frequency band indicated by the subframe indicated by the third time information or the third frequency information, so that the second scheduling information can be received.
  • the second scheduling information is used by the base station to schedule the first control.
  • the transmission of information Therefore, after receiving the second scheduling information sent by the base station, the terminal device can know that the base station schedules the first control information.
  • the second scheduling information may include indication information of a time-frequency resource that the base station sends the first control information, and the like.
  • the terminal device may receive the first control information sent by the base station according to the second scheduling information.
  • the first scheduling information and the second scheduling information may be mapped to different search spaces, or may be mapped to the same search space.
  • the base station sends multicast service data to the terminal.
  • the base station After transmitting the scheduling information (ie, the first scheduling information) of the multicast service data to the terminal device, the base station transmits the multicast service data to the terminal device.
  • the terminal device can receive the multicast service data sent by the base station according to the first scheduling information sent by the base station in step 210.
  • the base station sends the first scheduling information to the terminal device by mapping the scheduling information (ie, the first scheduling information) of the multicast service data received by the terminal device to the first search space or the second search space.
  • the terminal device is enabled to receive the first scheduling information. Therefore, the terminal device can receive the multicast service data sent by the base station according to the first scheduling information.
  • the base station needs to repeatedly send the multicast service data to the terminal device multiple times.
  • the first search space is a common search space
  • the second search space is a dedicated search space of the terminal device.
  • DCI #1 is taken as an example of the second scheduling information
  • DCI #2 is taken as an example of the first scheduling information
  • SC-MCCH is taken as an example of the first control information, and the present invention is implemented.
  • the method of transmitting data is exemplified.
  • Figure 3 shows a schematic diagram of a DCI mapping to a search space.
  • the base station maps both DCI #1 and DCI #2 to a Common Search Space (CSS).
  • CSS Common Search Space
  • the terminal device is usually in an idle state or a connected state.
  • the idle state and the connected state reference may be made to the description in the prior art, which will not be described in detail herein.
  • the terminal device is in an idle state.
  • FIG. 4 shows a schematic diagram of a method of transmitting data in accordance with an embodiment of the present invention.
  • the base station maps both DCI #1 and DCI #2 to the common search space. Therefore, the terminal device can receive the DCI #1 and DCI #2 transmitted by the base station by monitoring the common search space, and thus can receive the multicast service data sent by the base station.
  • the terminal device is in the connected state.
  • FIG. 5 shows a schematic diagram of a method of transmitting data in accordance with an embodiment of the present invention.
  • the terminal device receives the multicast service data sent by the base station, and includes the following steps:
  • the eNB sends a system message to the UE.
  • the system message includes configuration information of the PDCCH to which the DCI #1 is mapped, and the configuration information includes time information of the PDCCH transmitted by the base station (hereinafter referred to as time information #1 for convenience of distinction).
  • the time information #1 is used to indicate a subframe that carries the PDCCH.
  • the system message in step 301 can be SIB20.
  • the UE searches for a common search space on the subframe indicated by the time information #1 according to the system message, and receives the DCI #1 by blindly detecting the PDCCH.
  • the UE receives the DCI #1, and can receive the SC-MCCH carried on the Physical Downlink Shared Channel (PDSCH).
  • the SC-MCCH includes configuration information of a PDCCH to which DCI #2 is mapped, and the configuration information includes time information of the PDCCH (hereinafter referred to as time information #2 for convenience of distinction).
  • the time information #2 is used to indicate a subframe that carries the PDCCH.
  • the UE starts searching for a dedicated search space at the end time of the subframe indicated by the time information #1.
  • the UE searches for a common search space on the subframe indicated by the time information #2 according to the SC-MCCH to receive the DCI #2.
  • the UE receives DCI #2, and is thus able to receive the SC-MTCH carried on the PDSCH.
  • the UE starts searching for a dedicated search space at the end time of the indicated subframe of the time information #2.
  • the base station maps the DCI #1 and DCI #2 to the common search space, and when the terminal is in the connected state, configures the terminal to search for the common search space on the specified time period, The scheduling information of the multicast service data is received, so that the multicast service data can be received.
  • the UE after successfully decoding the multicast service data on the SC-MTCH, the UE starts a timer. During the running of the timer, the UE searches for a common search space. When the timer expires, the UE starts searching for a dedicated search space.
  • the timer may be a discontinuous reception inactivity timer (drx-Inactivity Timer).
  • time t 1 shown in FIG. 5 indicates the time when the UE decodes the SC-MTCH successfully.
  • the time t 2 indicates the time when the timer expires.
  • the UE when a UE is scheduled to transmit or receive data in a certain subframe, it is likely to continue to be scheduled in the next few subframes. If the UE waits until the next DRX cycle to receive or send this data, it will bring additional delay.
  • the UE After the UE is scheduled, after successfully decoding the multicast service data, the UE starts a timer and searches for the common search space during the running of the timer, that is, monitors the PDCCH (MPDCCH, ie, the PDCCH for the MTC). . When the timer expires, the UE starts searching for a dedicated search space.
  • MPDCCH Physical Downlink Control Channel
  • Figure 6 shows a schematic diagram of another DCI mapping to a search space. As shown in FIG. 6, in this embodiment, DCI #1 is mapped to CSS, and DCI #2 is mapped to GSS.
  • UEs interested in the same service can be divided into a group of groups, so that the dedicated G-RNTI can be used for scheduling when scheduling this service.
  • the GSS may be a USS. That is, the UE searches in the USS using the G-RNTI, except that this G-RNTI is allocated to a group of UEs.
  • the base station may allocate a part of resources specifically for the G-RNTI. Searching for G-RNTI on this part of the resource, this search space is called GSS.
  • the following describes the process of receiving multicast service data when the terminal devices are in the idle state and the connected state, respectively.
  • the terminal device is in an idle state.
  • FIG. 7 shows a schematic diagram of a method of transmitting data according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of receiving multicast service data when the terminal device is in an idle state. The specific process includes the following steps.
  • the eNB sends a system message to the UE.
  • the system message includes configuration information of a PDCCH to which DCI #1 is mapped, and the configuration information includes time information for transmitting a PDCCH to which DCI #1 is mapped (for convenience of distinction, hereinafter referred to as time information #3).
  • the UE searches for a common search space on the subframe indicated by the time information #3 according to the system message, to receive the DCI #1.
  • the UE receives DCI #1, and is thus able to receive the SC-MCCH carried on the PDSCH.
  • the SC-MCCH includes configuration information of a PDCCH mapped with DCI #2, where the configuration information includes time information of transmitting a PDCCH mapped with DCI #2 (for convenience of distinction, the following is recorded as time information # 4).
  • the SC-MCCH further includes: the base station sends the frequency information of the PDCCH mapped with the DCI #2, and the frequency information is used to indicate the frequency band used by the base station to transmit the PDCCH mapped with the DCI #2.
  • a terminal uses a narrower bandwidth to transmit and receive data, so the base station can indicate to the terminal which narrowband to transmit the PDCCH.
  • FIG. 8 shows a schematic diagram of a correspondence between a narrow band and a PDCCH.
  • different narrowbands may correspond to PDCCHs scrambled by different G-RNTIs.
  • one narrowband may correspond to one G-RNTI, or may correspond to multiple.
  • Figure 8 shows only as an example.
  • the SC-MCCH further includes a service type information of the SC-MTCH, a service type information, and a correspondence between time information and frequency information of the PDCCH to which the DCI #2 is mapped.
  • the service type may be a software upgrade service, a group voice service, or the like.
  • the software upgrade service is sent on the narrowband 1 (ie, narrow band 1) of the subframe 1 of the scheduling period, and the packet voice service is in the narrowband 2 of the subframe 2 of the scheduling period (ie, the narrow band 2). ) Send on, etc.
  • the UE searches for the GSS on the subframe indicated by the time information #4 according to the SC-MCCH to receive the DCI #2.
  • the UE searches for the GSS on the subframe indicated by the time information #4 in the frequency band indicated by the frequency information to receive the DCI #2.
  • the UE receives DCI #2 and receives the SC-MTCH.
  • the UE starts searching for the common search space at the end time of the subframe indicated by the time information #4.
  • the UE After successfully decoding the multicast service data on the SC-MTCH, the UE starts a timer. During the running of the timer, the UE searches for GSS. When the timer expires, the UE starts. Search for USS.
  • the timer may be a discontinuous reception inactivity timer (drx-Inactivity Timer).
  • timer t is running.
  • time t 3 indicates a successful UE decodes SC-MTCH time.
  • time t 4 represents a time timer expires.
  • the terminal device is in the connected state.
  • FIG. 9 shows a schematic diagram of a method of transmitting data according to another embodiment of the present invention.
  • FIG. 9 is a schematic diagram of receiving multicast service data when the terminal device is in a connected state.
  • the specific process includes the following steps.
  • the eNB sends a system message to the UE.
  • the system message includes configuration information of a PDCCH to which the DCI #1 is mapped, and the configuration information includes information of time information (hereinafter referred to as time information #5) for transmitting the PDCCH.
  • the UE searches for a CSS on the subframe indicated by the time information #5 according to the system message, to receive the DCI #1.
  • the UE receives DCI #1, and is thus able to receive the SC-MCCH carried on the PDSCH.
  • the SC-MCCH includes time information for transmitting the PDCCH by the eNB (for convenience of distinction, the following is referred to as time information #6).
  • the frequency information, the service type information of the SC-MTCH, and the correspondence between the service type information and the time information and the frequency information of the PDCCH to which the DCI #1 is mapped may be further included.
  • the UE starts searching for a dedicated search space at the end time of the subframe indicated by the time information #5.
  • the UE searches for a GSS on the subframe indicated by the time information #6 according to the SC-MCCH to receive the DCI #2.
  • the UE receives DCI #2, and thus can receive the SC-MTCH.
  • the UE starts searching for a dedicated search space at the end time of the subframe indicated by the time information #6.
  • the base station improves the flexibility of system scheduling by mapping DCI #1 and DCI #2 into different search spaces, respectively, and can increase system capacity.
  • the process in which the terminal device receives the multicast service data sent by the base station is as follows.
  • the base station sends a system message SIB20 to the terminal device, and the PDCCH for scheduling the SC-MCCH is configured in the SIB20 (for convenience of description, it is recorded as the first PDCCH); the first PDCCH schedules the SC-MCCH; and the SC-MCCH configures the PDCCH for scheduling the SC-MTCH. (For convenience of explanation, it is recorded as a second PDCCH); the second PDCCH schedules SC-MTCH.
  • process of receiving the multicast service data by the terminal device can also be implemented in other manners.
  • FIG. 10 is a schematic diagram showing transmission of multicast service data according to still another embodiment of the present invention.
  • the base station mainly performs the following steps:
  • the SC-MCCH is sent to the terminal device, and the configuration information of the PDCCH for scheduling the SC-MTCH is included in the SC-MCCH.
  • the PDCCH is sent to the terminal, and the configuration information of the SC-MTCH is carried on the PDCCH.
  • the terminal device receives the multicast service data sent by the base station, and performs the following steps:
  • the terminal device receives the SIB20 sent by the base station.
  • the terminal device receives the SC-MCCH according to the configuration information of the SC-MCCH in the SIB20.
  • the base station when the base station sends a change in the multicast service type, the base station sends a modification notification through the PDCCH to indicate the terminal device, so that the terminal device can check whether there is a service type that is of interest to the terminal device. In this way, the terminal device does not need to always monitor the scheduling information sent by the base station to save system overhead.
  • the base station transmits the SIB 20 to the terminal device, where the configuration information of the PDCCH scheduling the SC-MCCH is included in the SIB 20; the PDCCH scheduling SC-MCCH; and the SC-MCCH indicating the configuration information of the SC-MTCH.
  • the method shown in the number 3 is similar to the method shown in the above number 2, except that when the base station sends a modification notification, it directly transmits by scheduling the PDCCH of the SC-MCCH.
  • the base station transmits an SIB 20 to the terminal device, the SIB 20 indicating configuration information of the SC-MCCH, and the SC-MCCH indicating configuration information of the SC-MTCH.
  • the terminal device receives the multicast service data according to the configuration information of the SC-MTCH. Editing In the method shown in FIG. 4, the base station transmits a modification notification through the PDCCH only when the multicast service type changes.
  • FIG. 10 in the manner of transmitting the multicast service data shown in the numbers 2, 3, and 4, the operations that the base station and the terminal device need to perform are similar to the foregoing manner 1, and are not detailed herein.
  • the terminal device is not limited to receive the multicast service data sent by the base station by using the method.
  • FIG. 11 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present invention. As shown in FIG. 11, the terminal device includes:
  • the receiving unit 610 is configured to receive first scheduling information that is sent by the base station, where the first scheduling information is used by the base station to schedule transmission of the multicast service data, where the first scheduling information is mapped to the first search space or the second search space, where the first The search space is used to carry common control information, and the second search space is used to carry control information for the terminal device;
  • the receiving unit 610 is further configured to receive, according to the first scheduling information, the multicast service data sent by the base station.
  • the terminal device 600 shown in FIG. 11 may further include a processing unit 620.
  • the processing unit 620 is configured to determine, according to the first scheduling information received by the receiving unit 610, a time-frequency resource or the like used when the base station sends the multicast service data. Thereby, the receiving unit 610 receives the multicast service data on the time-frequency resource.
  • the receiving unit here may be a receiver, and the processing unit may be a processor.
  • the terminal device may further include a storage unit.
  • the storage unit can be a memory for storing computer instructions. When the processor executes an instruction stored in the memory, the receiver performs the corresponding steps of the method of transmitting data of the embodiment of the present invention.
  • the respective units in the terminal device 600 and the other operations or functions according to the embodiments of the present invention are respectively used to implement the corresponding processes executed by the terminal device in the method for transmitting data according to the embodiment of the present invention. For the sake of brevity, it will not be repeated here.
  • the terminal device maps to the first search space or the second by receiving the base station.
  • the scheduling information of the search space for receiving the multicast service data ie, the first scheduling information
  • the terminal device can receive the multicast service data sent by the base station according to the first scheduling information.
  • FIG. 12 shows a schematic block diagram of a base station 700 in accordance with an embodiment of the present invention. As shown in FIG. 12, the base station includes:
  • the sending unit 710 is configured to send the first scheduling information to the terminal device, where the first scheduling information is used by the base station to schedule the sending of the multicast service data, where the first scheduling information is mapped to the first search space or the second search space, where the first The search space is used to carry common control information, and the second search space is used to carry control information for the terminal device;
  • the sending unit 710 is further configured to send the first scheduling information to the terminal device.
  • the respective units in the base station 700 and the other operations or functions according to the embodiments of the present invention are respectively used to implement the corresponding processes performed by the base station in the method for transmitting data according to the embodiment of the present invention. For the sake of brevity, it will not be repeated here.
  • the base station sends the scheduling information (that is, the first scheduling information) of the multicast service data to the first search space or the second search space, and sends the first scheduling information to the terminal device. So that the terminal device can receive the first scheduling information. Therefore, the terminal device can receive the multicast service data according to the first scheduling information.
  • the base station 700 shown in FIG. 12 may further include a processing unit 720.
  • the processing unit 720 is configured to determine a time-frequency resource or the like used when transmitting the first scheduling information. Therefore, the sending unit 710 sends the multicast service data to the terminal device on the time-frequency resource.
  • the transmitting unit here may be a transmitter, and the processing unit may be a processor.
  • the terminal device may further include a storage unit.
  • the storage unit can be a memory for storing computer instructions. When the processor executes the instructions stored in the memory, the transmitter performs the corresponding steps of the method of transmitting data in accordance with an embodiment of the present invention.
  • FIG. 13 shows a schematic structural diagram of a terminal device 800 according to an embodiment of the present invention.
  • the terminal device includes: one or more processors 801, one or more memories 802, one or more transceivers (each transceiver including a transmitter 803 and a receiver 804) connected by a bus .
  • Transmitter 803 or receiver 804 is coupled to one or more antennas 805 and transmits and receives signals through the antenna.
  • Computer program instructions (or code) are stored in the memory.
  • the processor 801 is configured to execute instructions stored in the memory 802, when the instructions are executed,
  • the receiver 804 is configured to receive first scheduling information that is sent by the base station, where the first scheduling information is used by the base station to schedule transmission of the multicast service data, where the first scheduling information is mapped to the first search space or the second search space.
  • the first search space is used to carry common control information
  • the second search space is used to carry control information for the terminal device;
  • the receiver 804 is further configured to receive the multicast service data sent by the base station according to the first scheduling information.
  • processor 801 may include circuitry for audio/video and logic functions of the terminal device.
  • processor 801 can include digital signal processor devices, microprocessor devices, analog to digital converters, digital to analog converters, and the like. The control and signal processing functions of the mobile device can be distributed among these devices based on their respective capabilities.
  • Processor 801 may also include an internal voice coder VC, an internal data modem DM, and the like.
  • the processor can include functionality to operate one or more software programs, which can be stored in a memory.
  • the processor and the stored software instructions can be configured to cause the terminal device to perform an action.
  • the processor can operate the linker. .
  • Memory 802 can include read only memory and random access memory and provides instructions and data to processor 801. Portions of memory 802 may also include volatile memory and/or non-volatile memory.
  • volatile memory can include random access memory RAM including dynamic RAM and/or static RAM, on-chip and/or off-chip cache, and the like.
  • the non-volatile memory can be embedded and/or removable, and can include, for example, read only memory, flash memory, magnetic storage devices such as a hard disk, a floppy disk drive, magnetic tape, and the like, an optical disk drive and/or media, Non-volatile random access memory NVRAM and the like. Similar to volatile memory, the non-volatile memory can include a cache area for temporary storage of data.
  • the volatile and/or non-volatile memory can be embedded in the processor.
  • the memory can store one or more software programs, instructions, information blocks, data, etc., which can be used by the terminal device to perform the functions of the mobile terminal.
  • the memory may include an identifier capable of uniquely identifying the terminal device, such as an International Mobile Equipment Identity IMEI code.
  • the transceiver may include, for example, an infrared transceiver, a transceiver, a wireless universal serial bus USB transceiver, a Bluetooth transceiver, and the like.
  • the Bluetooth transceiver can operate according to low power or ultra low power Bluetooth technology.
  • the terminal device is capable of transmitting signals (or data) through a transmitter according to various wireless networking technologies, and/or receiving signals (data) through a receiver. These technologies include: Wi-Fi, Wi-Fi low power, WLAN technology such as IEEE 802.11 technology, IEEE 802.15 technology, IEEE 802.16 technology, and the like.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 801 or an instruction in a form of software. Transmitting data according to embodiments disclosed in the present invention
  • the steps of the method may be directly implemented by the hardware processor, or by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in memory 802, and processor 801 reads the information in memory 802 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the function of the terminal device 800 or the above operation according to the embodiment of the present invention is a corresponding process performed by the terminal device in the method for transmitting data according to the embodiment of the present invention. For the sake of brevity, it will not be repeated here.
  • the terminal device receives the scheduling information (ie, the first scheduling information) for receiving the multicast service data by using the base station to the first search space or the second search space, so that the terminal device can be according to the first Scheduling information, receiving multicast service data sent by the base station.
  • the scheduling information ie, the first scheduling information
  • FIG. 14 shows a schematic structural diagram of a base station 900 according to an embodiment of the present invention.
  • the base station includes one or more processors 901, one or more memories 902, and one or more transceivers (each transceiver including a transmitter 903 and a receiver 904) connected by a bus.
  • Transmitter 903 or receiver 904 is coupled to one or more antennas 905 and transmits and receives signals through the antenna.
  • Computer program instructions (or code) are stored in memory 902.
  • the processor 801 is configured to execute instructions stored in the memory 802, when the instructions are executed,
  • the transmitter 903 is configured to send the first scheduling information to the terminal device, where the first scheduling information is used by the base station to schedule the sending of the multicast service data, where the first scheduling information is mapped to the first search space or the second search space, and the first scheduling information is mapped. To the first search space or the second search space;
  • the transmitter 903 is also configured to send multicast service data to the terminal device.
  • processor 901 may include circuitry for audio/video and logic functions of the terminal device.
  • processor 901 can include a digital signal processor device, a microprocessor device, an analog to digital converter, a digital to analog converter, and the like. The control and signal processing functions of the mobile device can be distributed among these devices based on their respective capabilities.
  • the processor 901 may also include an internal voice coder VC, an internal data modem DM, and the like.
  • the processor can include functionality to operate one or more software programs, which can be stored in a memory.
  • the processor and the stored software instructions can be configured to cause the terminal device to perform an action.
  • the processor can operate the linker. .
  • Memory 902 can include read only memory and random access memory and provides instructions and data to processor 901.
  • a portion of memory 902 may also include volatile memory and/or non-volatile Memory.
  • volatile memory can include random access memory RAM including dynamic RAM and/or static RAM, on-chip and/or off-chip cache, and the like.
  • the non-volatile memory can be embedded and/or removable, and can include, for example, read only memory, flash memory, magnetic storage devices such as a hard disk, a floppy disk drive, magnetic tape, and the like, an optical disk drive and/or media, Non-volatile random access memory NVRAM and the like. Similar to volatile memory, the non-volatile memory can include a cache area for temporary storage of data.
  • the volatile and/or non-volatile memory can be embedded in the processor.
  • the memory can store one or more software programs, instructions, information blocks, data, etc., which can be used by the terminal device to perform the functions of the mobile terminal.
  • the memory may include an identifier capable of uniquely identifying the terminal device, such as an International Mobile Equipment Identity IMEI code.
  • the transceiver may include, for example, an infrared transceiver, a transceiver, a wireless universal serial bus USB transceiver, a Bluetooth transceiver, and the like.
  • the Bluetooth transceiver can operate according to low power or ultra low power Bluetooth technology.
  • the base station is capable of transmitting signals (or data) through a transmitter in accordance with various wireless networking technologies, and/or receiving signals (data) through a receiver. These technologies include: Wi-Fi, Wi-Fi low power, WLAN technology, such as IEEE 802.11 technology, IEEE 802.15 technology, IEEE 802.16 technology, and the like.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 901 or an instruction in a form of software.
  • the steps of the method for transmitting data disclosed in the embodiments of the present invention may be directly implemented as hardware processor execution completion, or performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the function of the base station 900 or the above operation according to the embodiment of the present invention is a corresponding flow performed by the base station in the method for transmitting data according to the embodiment of the present invention. For the sake of brevity, it will not be repeated here.
  • the base station sends the scheduling information (that is, the first scheduling information) of the multicast service data to the first search space or the second search space, and sends the first scheduling information to the terminal device. So that the terminal device can receive the first scheduling information. Therefore, the terminal device can receive the multicast service data according to the first scheduling information.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, 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.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • a storage medium includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明公开了一种传输数据的方法，使得终端设备能够接收多播业务数据。该方法包括：终端设备接收基站发送的第一调度信息，第一调度信息用于基站调度多播业务数据的发送，第一调度信息映射至第一搜索空间或第二搜索空间，第一搜索空间用于承载公共控制信息，第二搜索空间用于承载针对该终端设备的控制信息；终端设备根据第一调度信息，接收基站发送的多播业务数据。

Description

传输数据的方法、终端设备和基站 技术领域
本发明涉及数据传输领域，并且更具体地，涉及一种传输数据的方法、终端设备和基站。
背景技术
长期演进(Long Term Evolution，LTE)机器类型通讯(Machine type communication，MTC)有别于传统LTE通信，LTE MTC不追求数据传输速率、多频段、多天线、全双工传输。而是追求较长的终端装置时间、较低廉的终端装置成本，即要求终端能够实现低功耗、低成本。目前，MTC仅支持单播通信，即每个终端需要与基站建立通信连接。大量部署的MTC终端，基站将面临大量的终端连接数和大量的资源消耗。这对于整个通信系统而言，无疑是一个极大的挑战。为此，一种多播数据传输的技术单小区点对多点(Single Cell Point to Multi-point，SC-PTM)被引入到MTC中，以期实现基站向多个终端发送相同业务数据的目的。SC-PTM技术不要求终端建立连接，从而能够降低资源消耗，极大减轻网络的负担。
现有技术中，基站向终端发送多播业务(例如，通过SC-PTM发送多播业务)数据时，基站首先需要向终端设备发送传输多播业务数据的控制信息和调度信息。其中，调度信息通过物理下行控制信道(Physical Downlink Control Channel，PDCCH)承载。终端设备通过检测PDCCH接收调度信息。为了提高终端设备的检测效率，现有技术中划分了公用搜索空间和专用搜索空间。对于不同的调度信息，终端在不同的搜索空间进行搜索。
LTE中的终端能力较强，能够同时搜索两种搜索空间，以接收多播业务数据的控制信息和调度信息。进而在根据控制信息和调度信息接收多播业务数据。但是，对于MTC UE，由于其能力有限，不能同时搜索两种搜索空间。进而导致MTC UE接收不到多播业务数据的调度信息。因此，MTC UE无法接收多播业务数据。
发明内容
本申请提供一种传输数据的方法，使得终端设备能够接收多播业务数 据。
第一方面，本申请提供一种传输数据的方法，该方法包括：终端设备接收基站发送的第一调度信息，该第一调度信息用于基站调度多播业务数据的发送，该第一调度信息映射至第一搜索空间或第二搜索空间，第一搜索空间用于承载公共控制信息，第二搜索空间用于承载针对所述终端设备的控制信息；终端设备根据该第一调度信息，接收基站发送的多播业务数据。
在一种可能的实现方式中，所述终端设备接收基站发送的第一调度信息，包括：所述终端设备接收基站发送的第一控制信息，所述第一控制信息中携带时间信息和/或频率信息，其中，所述时间信息用于指示承载所述第一调度信息的子帧，所述频率信息用于指示所述基站发送所述第一调度信息时使用的频段；所述终端设备根据所述时间信息和/或频率信息，接收所述基站发送的第一调度信息。
在一种可能的实现方式中，所述第一调度信息映射至所述第一搜索空间，所述第一控制信息中包括第一时间信息，所述终端设备接收基站发送的第一调度信息，包括：所述终端设备在所述第一时间信息所指示的子帧上监测所述第一搜索空间，接收所述基站发送的所述第一调度信息。
在一种可能的实现方式中，所述终端设备处于连接态。
应理解，终端设备在处于空闲态时，会一直搜索第一搜索空间。因此，在基站将第一调度信息映射至第一搜索空间的情况下，终端设备在处于空闲态时，可以接收到基站发送的第一调度信息。而当终端设备处于连接态时，终端设备根据第一控制信息中的第一时间信息，在搜索第二搜索空间的过程中，通过在第一时间信息所指示的子帧上监测第一搜索空间，以接收第一基站发送的第一调度信息。
在一种可能的实现方式中，所述第一控制信息中还包括第一频率信息，所述第一频率信息用于指示第一频段，所述终端设备接收基站发送的第一调度信息，包括：所述终端设备在所述第一频段上监测所述第一搜索空间，接收所述基站发送的所述第一调度信息。
在一种可能的实现方式中，所述终端设备处于连接态时，所述终端设备接收所述基站发送的多播业务数据之后，所述方法还包括：所述终端设备启动第一定时器，并在所述第一定时器运行期间监测所述第一搜索空间；当所述第一定时器超时后，所述终端设备搜索所述第二搜索空间。
在一种可能的实现方式中，所述第一调度信息映射至第二搜索空间，所述第一控制信息中包括第二时间信息，所述终端设备接收基站发送的第一调度信息，包括：所述终端设备在所述第二时间信息所指示的子帧上监测所述第二搜索空间，接收所述基站发送的所述第一调度信息。
在一种可能的实现方式中，所述终端设备处于空闲态。
与前文所述的基站将第一调度信息映射至第一搜索空间类似，在基站将第一调度信息映射至第二搜索空间的情况下，由于终端设备在连接态时可以搜索专用搜索空间，因此可以接收到基站发送的第一调度信息。而在终端设备处于空闲态时，通过让终端设备在搜索第一搜索空间的过程中，在第二时间信息所指示的子帧上监测第二搜索空间，从而能够接收到基站发送的第一调度信息。
在一种可能的实现方式中，所述第一控制信息还包括第二频率信息，所述第二频率信息用于指示第二频段；所述终端设备接收基站发送的第一调度信息，包括：所述终端设备在所述第二频段上监测所述第二搜索空间，接收所述基站发送的第一调度信息。
在一种可能的实现方式中，所述终端设备处于空闲态时，所述终端设备接收所述基站发送的多播业务数据之后，所述方法还包括：所述终端设备启动第二定时器，并在所述第二定时器运行期间监测所述第二搜索空间；当所述第二定时器超时后，所述终端设备搜索所述第一搜索空间。
在一种可能的实现方式中，所述终端设备接收基站发送的第一控制信息，包括：所述终端设备接收所述基站发送的系统消息，所述系统消息中包括第三时间信息，所述第三时间信息用于指示承载第二调度信息的子帧，所述第二调度信息用于所述基站调度所述第一控制信息的发送，所述第二调度信息映射至第一搜索空间；所述终端设备在所述第三时间信息所指示的子帧上接收所述第二调度信息；所述终端设备根据所述第二调度信息，接收所述第一控制信息。
在一种可能的实现方式中，所述系统消息中还包括第三频率信息，所述第三频率信息用于指示所述基站发送所述第二调度信息时使用的第三频段，所述终端设备接收基站发送的第二调度信息，包括：所述终端设备在所述第三频段上接收所述基站发送的所述第二调度信息。
在一种可能的实现方式中，第一搜索空间为公共搜索空间，第二搜索空 间为终端设备的专用搜索空间。
第二方面，本申请提供一种传输数据的方法，该方法包括：基站向终端设备发送第一调度信息，第一调度信息用于调度终端设备接收多播业务数据，第一调度信息映射至第一搜索空间或第二搜索空间，其中，第一搜索空间用于承载公共控制信息，第二搜索空间用于承载针对所述终端设备的控制信息；基站向终端设备发送该多播业务数据。
在一种可能的实现方式中，所述基站向终端设备发送第一调度信息，包括：所述基站向所述终端设备发送第一控制信息，所述第一控制信息用于所述基站控制所述第一调度信息的发送，所述第一控制信息中包括时间信息和/或频率信息，所述时间信息用于指示承载所述第一调度信息的子帧，所述频率信息用于指示所述基站发送所述第一调度信息时使用的频段；所述基站向所述终端设备发送所述第一调度信息。
在一种可能的实现方式中，所述第一调度信息映射至所述第一搜索空间，所述第一控制信息中包括第一时间信息，所述基站向所述终端设备发送第一调度信息，包括：所述基站在所述第一时间信息所指示的子帧上向所述终端设备发送所述第一调度信息。
在一种可能的实现方式中，所述第一控制信息中包括第一频率信息，所述第一频率信息用于指示第一频段，所述基站向所述终端设备发送第一调度信息，包括：所述基站在所述第一频段上向所述终端设备发送所述第一调度信息。
在一种可能的实现方式中，所述第一调度信息映射至所述第二搜索空间，所述第一控制信息中包括第二时间信息，所述基站向所述终端设备发送第一调度信息，包括：所述基站在所述第二时间信息所指示的子帧上向所述终端设备发送所述第一调度信息。
在一种可能的实现方式中，所述第一控制信息中还包括第二频率信息，所述第二频率信息用于指示第二频段，所述基站向所述终端设备发送第一调度信息，包括：所述基站在所述第二频段上向所述终端设备发送所述第一调度信息。
在一种可能的实现方式中，所述基站向所述终端设备发送第一控制信息，包括：所述基站向所述终端设备发送系统消息，所述系统消息中包括第三时间信息，所述第三时间信息用于指示承载第二调度信息的子帧，所述第 二调度信息用于所述基站调度所述第一控制信息的发送，所述第二调度信息映射至第一搜索空间；所述基站在所述第三时间信息所指示的子帧上向所述终端设备发送第二调度信息；所述基站向所述终端设备发送第一控制信息。
在一种可能的实现方式中，所述系统消息中包括第三频率信息，所述第三频率信息用于指示所述基站发送所述第二调度信息时使用的第三频段，所述基站在所述第三频段上向所述终端设备发送第二调度信息。
第三方面，本申请提供一种终端设备，用于执行第一方面或第一方面的任意可能的实现方式中的方法。具体地，该终端设备包括用于执行第一方面或第一方面的任意可能的实现方式中的方法的单元。
第四方面，本申请提供一种基站，用于执行第二方面或第二方面的任意可能的实现方式中的方法。具体地，该基站包括用于执行第二方面或第二方面的任意可能的实现方式中的方法的单元。
第五方面，本申请提供一种终端设备，该终端设备包括一个或多个处理器，一个或多个存储器，一个或多个收发器(每个收发器包括发射机和接收机)，并通过总线相连接。发射机或接收机与一个或多个天线连接，并通过天线收发信号。存储器用于存储计算机程序指令(或者说，代码)。处理器用于执行存储器中存储的指令，当指令被执行时，处理器执行第一方面或第一方面的任意可能的实现方式中的方法。
第六方面，本申请提供一种基站，该基站包括一个或多个处理器，一个或多个存储器，一个或多个收发器(每个收发器包括发射机和接收机)，并通过总线相连接。发射机或接收机与一个或多个天线连接，并通过天线收发信号。存储器用于存储计算机程序指令(或者说，代码)。处理器用于执行存储器中存储的指令，当指令被执行时，处理器执行第二方面或第二方面的任意可能的实现方式中的方法。
第七方面，本申请提供一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第一方面或第一方面的任意可能的实现方式中的方法的指令。
第八方面，本申请提供一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第二方面或第二方面的任意可能的实现方式中的方法的指令。
在本发明实施例中，基站通过将终端设备接收多播业务数据的调度信息 (即，第一调度信息)映射至第一搜索空间或第二搜索空间，将第一调度信息发送给终端设备，使得终端设备能够接收到第一调度信息。从而终端设备根据第一调度信息，能够接收多播业务数据。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1示出了适用于本发明实施例的系统架构图。
图2示出了根据本发明实施例的传输数据的示意性流程图。
图3示出了根据本发明一实施例的DCI映射至搜索空间的示意图。
图4示出了根据本发明一实施例的传输数据的方法的示意图。
图5示出了根据本发明另一实施例的传输数据的方法的示意图。
图6示出了根据本发明另一实施例的DCI映射至搜索空间的示意图。
图7示出了根据本发明一实施例的传输数据的方法的示意图。
图8示出了本发明一实施例的窄带与G-RNTI对应关系的示意图。
图9示出了根据本发明另一实施例的传输数据的方法的示意图。
图10示出了根据本发明再一实施例的传输数据的方法的示意性图。
图11示出了根据本发明实施例的终端设备600的示意性框图。
图12示出了根据本发明实施例的基站700的示意性框图。
图13示出了本发明实施例的终端设备800的示意性结构图。
图14示出了本发明实施例的基站900的示意性结构图。
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清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有付出创造性劳动的前提下所获得的所有其他实施例，都应属于本发明保护的范围。
应理解，本发明实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多 址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WIMAX)通信系统等。
还应理解，在本发明实施例中，终端设备也可称之为用户设备(User Equipment，UE)、终端(Terminal)、移动用户设备等。可以经无线接入网(例如，Radio Access Network，RAN)与一个或多个核心网进行通信。终端设备可以是移动终端，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。在本发明实施例中，终端设备包含手机、智能终端(可穿戴设备、智能手表、智能电表、智能水表等)、多媒体设备、流媒体设备等。另外，本发明实施例中的终端设备还可以是MTC中的终端设备。
在本发明实施例中，基站可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)。还可以是LTE中的演进型基站(Evolutional Node B，ENB或e-NodeB)或未来通信系统(例如，5G)中网络侧的数据收发节点等。本发明实施例并不作特别限定。为了描述方便，下面实施例仅以基站为e-NodeB作为示例，进行说明。
首先，对本发明实施例中涉及的相关概念进行介绍。
多播业务数据：即，多媒体广播多播业务(Multimedia Broadcast Multicast Service，MBMS)数据。为了有效利用移动网络资源，第三代合作伙伴计划(3GPP，3rd Generation Partnership Project)提出了MBMS。MBMS业务是一种从一个数据源向多个目标移动终端传输数据的技术。实现了网络侧(包括核心网和接入网)资源的共享，提高了网络资源(尤其是空口资源)的利用率。
在LTE系统中，通知终端设备关于某个MBMS业务将要发生变化(例如，会话开始、业务承载更新或会话停止等)，可以先在PDCCH上发送下 行控制信息(Downlink Control Information，DCI)和MBMS无线网络临时标识(MBMS Radio Network Temporary Identity，MBMS RNTI)。终端根据DCI中的相关信息进一步读取MBMS控制信道(Multi-cast Control Channel，MCCH)消息。MCCH信道上将发送具体的业务配置参数，例如，业务ID、物理层配置参数等。
公共搜索空间和专用搜索空间：PDCCH作为系统资源分配与控制信息调度的核心，终端一般不知道当前PDCCH传输的是什么信息，也不知道自己需要的信息在什么位置。但是终端通常知道自己在期待什么信息。例如，终端在空闲态(即，IDLE态)时，期待的信息是寻呼(paging)消息和系统消息。在发起随机接入后，期待的是随机接入响应消息。在有上行数据等待发送时，期待的信息是上行链路授权消息等。对于不同期望的信息，终端使用相应的RNTI去和CCE信息做校验。如果校验成功，那么终端就知道这个信息是自己需要的。也可以进一步知道这个信息的DCI格式、解调方式等，从而解出DCI的内容。这个过程也称为PDCCH的盲检。
现有技术中，承载PDCCH的基本单元为控制信道单元(Control Channel Element，CCE)。每个CCE包括9个资源单元组(Resource Element Group，REG)，每个资源单元组包括4个资源单元(Resource Element，RE)。如果终端按照CCE的顺序依次搜索，那么终端的计算量显然太大，效率很低。尤其是在系统带宽较大、CCE数目较多的情况下。
为了降低终端进行盲检的复杂度。现有协议中定义搜索空间的概念，并划分了公共搜索空间(Common Search Space，CSS)和终端的专用搜索空间(UE-specific Search Space，USS)。
公共搜索空间是指所有终端都需要监测的空间，通常用来发送寻呼、随机接入响应(Random Access Response，RAR)、系统消息和终端的上行功率控制消息等。也可以说，将这些信息的调度信息映射到公共搜索空间。
终端的专用搜索空间是指针对某个终端的信息，不需要所有终端监听。也可以说，将这些信息的调度信息映射至终端的专用搜索空间。所述专用搜索空间映射有至少一个终端设备的调度信息。多个终端设备的调度信息可以重叠使用该专用搜索空间中的资源。所述专用搜索空间可以包括多个CCE，所述多个CCE用于承载所述至少一个终端设备的控制信息或调度信息，当有多个终端设备时，承载至少两个终端设备的控制信息或调度信息的CCE 可以相同或不同。
下面结合图1至图10，详细说明本发明实施例的传输数据的方法。
图1示出了根据本发明实施例的系统架构图。如图1所示，系统中包括基站101、终端设备102和终端设备设备103。其中，终端设备102和终端设备103处于基站101的覆盖范围内，并与基站101进行多播通信。即基站101同时向终端设备102和终端设备103发送多播业务数据。
应理解，图1中所示的系统架构中，仅以基站101向两个终端设备(即，终端设备102和终端设备103)发送多播业务数据作为示例。显然，也可以有更多数量的终端设备。本发明实施例对于终端设备的数量并没有任何限制。
还应理解，在本发明实施例中，编号“第一”、“第二”仅仅为了区分不同的对象。例如，为了区分不同的调度信息、不同的时段等，不应对本发明实施例的保护范围构成任何限定。
需要说明的是，根据本发明实施例的传输数据的方法应用于MTC时，PDCCH也可以称为MPDCCH，即针对MTC的PDCCH。
图2示出了根据本发明实施例的传输数据的示意性流程图。如图2所示，该方法主要包括步骤210和步骤220。
210、终端设备接收基站发送的第一调度信息。
其中，第一调度信息映射至第一搜索空间或第二搜索空间。第一搜索空间用于承载公共控制信息，第二搜索空间用于承载针对该终端设备的控制信息。
应理解，在本发明实施例中，第一调度信息用于基站调度发送给终端的多播业务数据。换句话说，终端设备根据第一调度信息，可以接收基站发送的多播业务数据。
可选地，作为一个实施例，终端设备接收基站发送第一调度信息，包括：
终端设备接收基站发送的第一控制信息，第一控制信息中携带时间信息或频率信息，其中，时间信息用于指示基站发送第一调度信息时承载第一调度信息的子帧，频率信息用于指示基站发送第一调度信息时使用的频段；
终端设备根据时间信息或频率信息，接收基站发送的第一调度信息。
具体地，基站向终端发送第一调度信息之前，可以先向终端设备发送第一控制信息。其中，对于基站而言，第一控制信息用于控制第一调度信息的 发送。这样，终端设备接收到基站发送的第一控制信息，就可以获知基站发送第一调度信息的控制信息。例如，第一控制信息中可以包括第一调度信息的配置信息，配置信息包括基站发送第一调度信息时使用的时频资源的指示信息等。进而，终端设备就可以根据第一调度信息的配置信息，对基站后续发送的第一调度信息进行接收。
在本发明实施例中，第一调度信息可以映射(mapped)至第一搜索空间(即，情况1)或第二搜索空间(即，情况2)。以下分别对这两种情况下，终端设备接收第一调度信息的过程进行详细说明。
情况1
第一调度信息映射至第一搜索空间
可选地，作为一个实施例，第一调度信息映射至第一搜索空间，第一控制信息中包括第一时间信息，第一时间信息用于指示基站发送第一调度信息时承载第一调度信息的子帧，
以及，终端设备接收基站发送的第一调度信息，包括：
终端设备在所述第一时间信息所指示的子帧上监测第一搜索空间，以接收基站发送的第一调度信息。
在本发明实施例中，当第一控制信息中仅包括第一时间信息时，终端设备在第一时间信息所指示的子帧上监测第一搜索空间，以接收第一调度信息。
应理解，在现有技术中，终端设备在空闲态时搜索公共搜索空间CSS，在连接态时搜索专用搜索空间USS。由于不能在连接态时同时搜索CSS和USS，因而接收不到基站发送的用于调度多播业务数据的调度信息，进而也就不能接收基站发送的多播业务数据。
在本发明实施例中，在基站将第一调度信息映射至公共搜索空间的情况下，基站先通过向终端设备发送第一控制信息，并在第一控制信息中向终端设备指示基站发送第一调度信息时承载第一调度信息的子帧。这样，处于连接态的终端设备在接收到第一控制信息后，可以在第一时间信息所指示的子帧上去监测(monitoring)公共搜索空间，就可以接收到基站发送的第一调度信息，进而接收基站发送的多播业务数据。
可选地，作为一个实施例，第一控制信息中包括第一频率信息，其中，第一频率信息用于指示基站发送第一调度信息时使用的第一频段；
以及，终端设备接收基站发送的第一调度信息，包括：
终端设备在第一频段上监测第一搜索空间，接收基站发送的第一调度信息。
与上文所述的第一控制信息中携带第一时间信息类似，基站也可以在第一控制信息中向终端设备指示发送第一调度信息时使用的频段。这样，终端设备在处于连接态时，在搜索专用搜索空间的过程中，在第一频段上搜索公共搜索空间，从而接收到基站发送的第一调度信息。
可选地，第一控制信息中可以同时包括第一时间信息和第一频率信息。相对应地，处于连接态的终端设备在第一时间信息指示的子帧上、第一频率信息指示的频段搜索公共搜索空间，以接收基站发送的第一调度信息。
需要说明的是，所述频段可以是由连续6个物理资源块(Physical Resource Block，PRB)组成窄带。例如，将系统带宽50个PRB分成8个窄带，第1个与最后1个PRB空余，第2至7PRB为第一个窄带，第8至13为第二窄带，依此类推。可以将这些窄带按分割顺序编上索引值，所述频段可以使用索引值来指示。或者，所述频段还可以包括多个窄带。
情况2
第一调度信息映射至第二搜索空间
可选地，作为一个实施例，第一调度信息映射至第二搜索空间，第一控制信息中包括第二时间信息，
以及，终端设备接收基站发送的第一调度信息，包括：
终端设备在第二时间信息所指示的子帧上监测第二搜索空间，接收基站发送的第一调度信息。
根据前文所述已经知道，现有技术中，终端设备在空闲态时搜索公共搜索空间CSS，在连接态时搜索专用搜索空间USS。因此，在基站将第一调度信息映射至第二搜索空间的情况下，由于终端设备处于连接态时可以监测第二搜索空间，因而可以接收第一调度信息。
在本发明实施例中，当终端设备处于空闲态时，基站通过第一控制信息中向终端设备指示承载第一调度信息的子帧。从而可以使得处于空闲态的终端设备在基站所指示的子帧上监测第二搜索空间，以接收第一调度信息。
可选地，作为一个实施例，所述第一控制信息包括第二频率信息，第二频率信息用于指示基站发送第一调度信息时使用的第二频段，
以及，终端设备接收基站发送的第一调度信息，包括：
终端设备在第二频段上监测第二搜索空间，接收基站发送的第一调度信息。
类似地，基站也可以通过第一控制信息向终端设备指示发送第一调度信息时使用的第二频段。这样，终端设备在第二频段上监测第第二搜索空间，从而可以接收基站发送的第一调度信息。
可选地，第一控制信息中可以同时包括第二时间信息和第二频率信息。此时，终端设备根据第二时间信息和第二频率信息，在第二时间信息所指示的子帧上、在第二频率信息所指示的频段上接收第一调度信息。
以上对第一调度信息映射至第一搜索空间和第二搜索空间分别进行了说明。通过前文可以知道，在本发明实施例中，基站通过指示终端设备在指定的时刻和频段(例如，在MTC中，可以为窄带)搜索映射有第一调度信息的搜索空间，以接收基站发送的第一调度信息，进而根据第一调度信息可以接收基站发送的多播业务数据。
可选地，作为一个实施例，终端设备接收基站发送的第一控制信息，包括：
终端设备接收基站发送的系统消息，系统消息中包括第三时间信息，第三时间信息用于指示承载第二调度信息的子帧，第二调度信息用于基站调度第一控制信息的发送；
终端设备在第三时间信息所指示的子帧上接收第二调度信息，第二调度信息映射至第一搜索空间；
终端设备根据第二调度信息，接收第一控制信息。
在本发明实施例中，终端设备在接收第一控制信息时，可以先接收到基站发送的系统消息，系统消息可以指示终端设备接收第二调度信息，第二调度信息用于基站调度第一控制信息的发送。终端设备接收第二调度信息后，根据第二调度信息，接收第一控制信息。
具体地，系统消息中可以携带指示承载第二调度信息的子帧的第三时间信息。或者，系统消息中还可以包括指示基站发送第二调度信息时使用的频段的第三频率信息。终端设备在第三时间信息所指示的子帧或第三频率信息所指示的频段上搜索第一搜索空间，从而可以接收到第二调度信息。
在本发明实施例中，对于基站而言，第二调度信息用于基站调度第一控 制信息的发送。因此，终端设备接收到基站发送的第二调度信息后，可以知道基站调度第一控制信息的情况。例如，第二调度信息中可以包括基站发送第一控制信息的时频资源的指示信息等。进而终端设备可以根据第二调度信息接收基站发送的第一控制信息。
可选地，在本发明实施例中，第一调度信息和第二调度信息可以映射至不同的搜索空间，也可以映射至相同的搜索空间。
220、基站向终端发送多播业务数据。
基站在向终端设备发送多播业务数据的调度信息(即，第一调度信息)之后，向终端设备发送多播业务数据。相对应地，终端设备根据步骤210中基站发送的第一调度信息，可以接收基站发送的多播业务数据。
在本发明实施例中，基站通过将终端设备接收多播业务数据的调度信息(即，第一调度信息)映射至第一搜索空间或第二搜索空间，将第一调度信息发送给终端设备，使得终端设备能够接收到该第一调度信息。从而终端设备根据该第一调度信息，能够接收基站发送的多播业务数据。
需要说明的是，本发明实施例的传输数据的方法应用于MTC时，基站需要向终端设备多次重复发送多播业务数据。
可选地，在本发明实施例中，第一搜索空间为公共搜索空间，第二搜索空间为该终端设备的专用搜索空间。
为了便于理解，不失一般性地，以下将DCI#1作为第二调度信息的一例，将DCI#2作为第一调度信息的一例，将SC-MCCH作为第一控制信息的一例，对本发明实施例的传输数据的方法进行举例说明。
图3示出了一种DCI映射至搜索空间的示意图。如图3所示，在该实施例中，基站将DCI#1和DCI#2都映射至公共搜索空间(Common Search Space，CSS)。
可以理解的是，终端设备通常处于空闲态或连接态。关于空闲态和连接态，可以参考现有技术中的说明，这里不作详述。
以下结合图4，对在图3中所示的DCI映射方式下，终端设备接收多播业务数据的过程进行详细说明。
情况1
终端设备处于空闲态。
图4示出了根据本发明一实施例的传输数据的方法的示意图。如图4所 示，在终端设备处于空闲态的情况下，由于终端设备会一直搜索公共搜索空间，而在该实施例中，基站将DCI#1和DCI#2都映射至公共搜索空间。因此，终端设备通过监测公共搜索空间可以接收到基站发送的DCI#1和DCI#2，因而可以接收基站发送的多播业务数据。
情况2
终端设备处于连接态。
图5示出了根据本发明一实施例的传输数据的方法的示意图。如图5所示，在这种情况下，终端设备接收基站发送的多播业务数据，包括如下几个步骤：
301、eNB向UE发送系统消息。
系统消息中包括映射有DCI#1的PDCCH的配置信息，该配置信息中包括基站发送PDCCH的时间信息(为了便于区分，以下记作时间信息#1)。其中，时间信息#1用于指示承载PDCCH的子帧。
具体地，步骤301中的系统消息可以为SIB20。
302、UE根据系统消息，在时间信息#1指示的子帧上搜索公共搜索空间，以盲检PDCCH来接收DCI#1。
应理解，UE接收到DCI#1，进而能够接收到承载于物理下行共享信道(Physical Downlink Shared Channel，PDSCH)上的SC-MCCH。在本发明实施例中，SC-MCCH中包括映射有DCI#2的PDCCH的配置信息，该配置信息中包括PDCCH的时间信息(为了便于区分，以下记作时间信息#2)。其中，时间信息#2用于指示承载PDCCH的子帧。
303、UE在时间信息#1所指示的子帧的结束时刻开始搜索专用搜索空间。
304、UE根据SC-MCCH，在时间信息#2所指示的子帧上搜索公共搜索空间，以接收DCI#2。
类似地，UE接收到DCI#2，进而能够接收到承载于PDSCH上的SC-MTCH。
305、UE在时间信息#2的所指示的子帧的结束时刻开始搜索专用搜索空间。
可见，在该实施例中，基站通过将DCI#1和DCI#2映射至公共搜索空间，并在终端处于连接态时，配置终端在指定时段上搜索公共搜索空间，以 接收多播业务数据的调度信息，从而可以接收多播业务数据。
可选地，在本发明实施例中，UE在成功解码SC-MTCH上的多播业务数据后，会启动一个定时器。在定时器运行期间，UE搜索公共搜索空间。当定时器超时时，UE开始搜索专用搜索空间。具体地，该定时器可以为非连续接收非活动定时器(drx-Inactivity Timer)。
需要说明的是，图5中所示的t1时刻表示UE解码SC-MTCH成功的时刻。t2时刻表示定时器超时的时刻。
应理解，在大多数情况下，当一个UE在某个子帧被调度发送或接收数据后，很可能会在接下来的几个子帧内继续被调度。如果UE等到下一个DRX cycle再来接收或发送这些数据会带来额外的延迟。为了降低这类延迟，UE被调度后，在成功解码多播业务数据后，UE启动一个定时器，在定时器的运行期间一直搜索公共搜索空间，即监测PDCCH(MPDCCH，即针对MTC的PDCCH)。当定时器超时时，UE又开始搜索专用搜索空间。
图6示出了另一DCI映射至搜索空间的示意图。如图6所示，在该实施例中，将DCI#1映射至CSS，将DCI#2映射至GSS。
下面，对本发明实施例的GSS进行详细说明。
考虑到SC-PTM业务的不同，对相同业务感兴趣的UE可以划分为一组Group，这样调度这个业务时可以使用专用的G-RNTI进行调度。
可选地，作为一个实施例，GSS可以是一种USS。即，UE使用G-RNTI在USS中搜索，只是这个G-RNTI会分配给一个组的UE。
可选地，作为一个实施例，基站可以专门为G-RNTI分配一部分资源。在这部分资源上搜索G-RNTI，这个搜索空间就称为GSS。
以下结合图7和图9，对在图6中所示的DCI映射方式下，终端设备接收多播业务数据的过程进行详细说明。
与前文类似，下面对终端设备分别处于空闲态和连接态时接收多播业务数据的过程进行说明。
情况1
终端设备处于空闲态。
图7示出了根据本发明另一实施例的传输数据的方法的示意图。图7为终端设备处于空闲态时接收多播业务数据的示意图。具体过程包括如下步骤。
401、eNB向UE发送系统消息。
系统消息中包括映射有DCI#1的PDCCH的配置信息，该配置信息中包括发送映射有DCI#1的PDCCH的时间信息(为了便于区分，以下记作时间信息#3)。
402、UE根据系统消息，在时间信息#3所指示的子帧上搜索公共搜索空间，以接收DCI#1。
应理解，UE接收到DCI#1，进而能够接收到承载于PDSCH上的SC-MCCH。在本发明实施例中，SC-MCCH中包括映射有DCI#2的PDCCH的配置信息，该配置信息中包括发送映射有DCI#2的PDCCH的时间信息(为了便于区分，以下记作时间信息#4)。
可选地，SC-MCCH还包括基站发送映射有DCI#2的PDCCH的频率信息，频率信息用于指示基站发送映射有DCI#2的PDCCH时使用的频段。
在e-MTC中，终端使用较窄的带宽来收发数据，因此基站可以向终端指示在哪个窄带(narrow band)上发送PDCCH。
图8示出了一种窄带与PDCCH的对应关系的示意图。如图8所示，不同的窄带可以对应不同G-RNTI加扰的PDCCH。可选地，一个窄带可以对应一个G-RNTI，也可以对应多个。图8所示仅作为一种示例。
可选地，SC-MCCH中还包括SC-MTCH的业务类型信息、业务类型信息与发送映射有DCI#2的PDCCH的时间信息和频率信息的对应关系。
例如，业务类型可以为软件升级类业务、群组语音业务等。以图8为例，软件升级类业务在调度周期的子帧1的窄带1(即，narrow band 1)上发送，群组语音业务在调度周期的子帧2的窄带2(即，narrow band 2)上发送等。
403、UE根据SC-MCCH，在时间信息#4所指示的子帧上搜索GSS，以接收DCI#2。
与步骤402对应，当SC-MCCH中携带频率信息时，UE在频率信息所指示的频段上，在时间信息#4所指示的子帧上搜索GSS，以接收DCI#2。
应理解，UE接收到DCI#2，进而接收到SC-MTCH。
404、UE在时间信息#4所指示的子帧的结束时刻开始搜索公共搜索空间。
可选地，UE在成功解码SC-MTCH上的多播业务数据后，会启动一个一个定时器。在定时器运行期间，UE搜索GSS。当定时器超时时，UE开始 搜索USS。
具体地，该定时器可以为非连续接收非活动定时器(drx-Inactivity Timer)。
应理解，图7中t3时刻和t4时刻之间的时段为定时器运行的时段。t3时刻表示UE解码SC-MTCH成功的时刻。t4时刻表示定时器超时的时刻。
情况2
终端设备处于连接态。
图9示出了根据本发明另一实施例的传输数据的方法的示意图。图9为终端设备处于连接态时接收多播业务数据的示意图。具体过程包括如下步骤。
501、eNB向UE发送系统消息。
在本发明实施例中，系统消息中包括映射有DCI#1的PDCCH的配置信息，该配置信息中包括发送PDCCH的时间信息(为了便于区分，以下记作时间信息#5)的信息。
502、UE根据系统消息，在时间信息#5所指示的子帧上搜索CSS，以接收DCI#1。
应理解，UE接收到DCI#1，进而能够接收到承载于PDSCH上的SC-MCCH。其中，SC-MCCH中包括eNB发送PDCCH的时间信息(为了便于区分，以下记作时间信息#6)。
可选地，还可以包括频率信息、SC-MTCH的业务类型信息以及业务类型信息与发送映射有DCI#1的PDCCH的时间信息和频率信息的对应关系。
503、UE在时间信息#5所指示的子帧的结束时刻开始搜索专用搜索空间。
504、UE根据SC-MCCH，在时间信息#6所指示的子帧上搜索GSS，以接收DCI#2。
应理解，UE接收到DCI#2，进而可以接收到SC-MTCH。
505、UE在时间信息#6所指示的子帧的结束时刻开始搜索专用搜索空间。
在该实施例中，基站通过将DCI#1和DCI#2分别映射到不同的搜索空间中，提高了系统调度的灵活性，能够增加系统容量。
在以上的实施例中，终端设备接收基站发送的多播业务数据的过程如 下：基站向终端设备发送系统消息SIB20，SIB20中配置调度SC-MCCH的PDCCH(为了便于说明，记作第一PDCCH)；第一PDCCH调度SC-MCCH；SC-MCCH配置调度SC-MTCH的PDCCH(为了便于说明，记作第二PDCCH)；第二PDCCH调度SC-MTCH。
除此以外，终端设备接收多播业务数据的过程还可以通过其它方式实现。
图10示出了本发明再一实施例的传输多播业务数据的示意图。图10中示出了传输多播业务数据的其它几种方式。例如，在编号①所示的方式中，基站主要执行如下几个步骤：
1、向终端设备发送SIB20，SIB20指示SC-MCCH的配置信息。
2、向终端设备发送SC-MCCH，SC-MCCH中包括调度SC-MTCH的PDCCH的配置信息。
3、向终端发送PDCCH，PDCCH上承载SC-MTCH的配置信息。
4、向终端发送SC-MTCH。
相对应地，终端设备接收基站发送的多播业务数据，主要执行如下步骤：
1、终端设备接收基站发送的SIB20。
2、终端设备根据SIB20中SC-MCCH的配置信息，接收SC-MCCH。
3、根据SC-MCCH中调度SC-MTCH的PDCCH的配置信息，接收PDCCH。
4、根据PDCCH上承载的SC-MTCH的配置信息，接收SC-MTCH。
并且，在编号①所示的方式中，当基站发送多播业务类型发生变化时，基站通过PDCCH发送修改通知来指示终端设备，以便于终端设备查看是否有自己关心的业务类型。这样，终端设备不用一直对基站发送的调度信息进行监听，以节省系统开销。
类似地，在编号②所示的方法中，基站向终端设备发送SIB20，SIB20中包括调度SC-MCCH的PDCCH的配置信息；PDCCH调度SC-MCCH；SC-MCCH指示SC-MTCH的配置信息。在编号③所示的方法中，与上述编号②中所示的方法类似，不同之处在于基站发送修改通知时，直接通过调度SC-MCCH的PDCCH进行发送。在编号④所示的方法中，基站向终端设备发送SIB20，SIB20指示SC-MCCH的配置信息；SC-MCCH指示SC-MTCH的配置信息。终端设备根据SC-MTCH的配置信息接收多播业务数据。在编 号④所示的方法中，基站只有在多播业务类型发生变化时，通过PDCCH发送修改通知。图10中，编号②、③、④中所示的传输多播业务数据的方式中，基站与终端设备需要执行的操作与上述方式1类似，这里不再一一详述。
应理解，在本发明实施例中，并不局限于通过那种方法来实现终端设备接收基站发送的多播业务数据。
还应理解的是，本发明各个实施例所示的步骤或操作仅作为示例，也可以执行其他操作或者各种操作的变形。并且，在具体实施时，各个步骤还可以按照与本发明实施例中所述的不同的顺序来执行，并且有可能并非执行全部操作或步骤，或者执行更多的步骤。
以上结合图1至图10，对本发明实施例的传输数据的方法作了详细说明。以下结合图11至图14，对本发明实施例的终端设备和基站进行说明。
图11示出了根据本发明实施例的终端设备600的示意性框图。如图11所示，终端设备包括：
接收单元610，用于接收基站发送的第一调度信息，第一调度信息用于基站调度多播业务数据的发送，第一调度信息映射至第一搜索空间或第二搜索空间，所述第一搜索空间用于承载公共控制信息，所述第二搜索空间用于承载针对所述终端设备的控制信息；
接收单元610还用于接收根据所述第一调度信息，接收基站发送的多播业务数据。
应理解，图11所示的终端设备600还可以包括处理单元620。处理单元620用于根据接收单元610接收的第一调度信息，确定基站发送多播业务数据时使用的时频资源等。从而，接收单元610在该时频资源上接收该多播业务数据。
这里的接收单元可以为接收机，处理单元可以为处理器。可选地，终端设备还可以包括存储单元。存储单元可以为存储器，存储器用于存储计算机指令。当处理器执行存储器中存储的指令时，接收机执行本发明实施例的传输数据的方法的相应步骤。
根据本发明实施例的终端设备600中的各单元和上述其它操作或功能分别为了实现本发明实施例的传输数据的方法中由终端设备执行的相应流程。为了简洁，此处不再赘述。
在本发明实施例中，终端设备通过接收基站映射至第一搜索空间或第二 搜索空间的用于接收多播业务数据的调度信息(即，第一调度信息)，从而终端设备能够根据第一调度信息，接收基站发送的多播业务数据。
图12示出了根据本发明实施例的基站700的示意性框图。如图12所示，基站包括：
发送单元710，用于向终端设备发送第一调度信息，第一调度信息用于基站调度多播业务数据的发送，第一调度信息映射至第一搜索空间或第二搜索空间，所述第一搜索空间用于承载公共控制信息，所述第二搜索空间用于承载针对所述终端设备的控制信息；
发送单元710还用于，向终端设备发送所述第一调度信息。
根据本发明实施例的基站700中的各单元和上述其它操作或功能分别为了实现本发明实施例的传输数据的方法中由基站执行的相应流程。为了简洁，此处不再赘述。
在本发明实施例中，基站通过将终端设备接收多播业务数据的调度信息(即，第一调度信息)映射至第一搜索空间或第二搜索空间，将该第一调度信息发送给终端设备，使得终端设备能够接收到该第一调度信息。从而终端设备根据该第一调度信息，能够接收多播业务数据。
应理解，图12所示的基站700还可以包括处理单元720。处理单元720用于确定发送第一调度信息时使用的时频资源等。从而，发送单元710在该时频资源上向终端设备发送多播业务数据。
这里的发送单元可以为发射机，处理单元可以为处理器。可选地，终端设备还可以包括存储单元。存储单元可以为存储器，存储器用于存储计算机指令。当处理器执行存储器中存储的指令时，发射机执行本发明实施例的传输数据的方法的相应步骤。
图13示出了本发明实施例的终端设备800的示意性结构图。如图13所示，终端设备包括：一个或多个处理器801，一个或多个存储器802，一个或多个收发器(每个收发器包括发射机803和接收机804)，通过总线相连接。发射机803或接收机804与一个或多个天线805连接，并通过天线收发信号。存储器中存储计算机程序指令(或者说，代码)。处理器801用于执行存储器802中存储的指令，当指令被执行时，
接收机804用于接收基站发送的第一调度信息，第一调度信息用于基站调度多播业务数据的发送，第一调度信息映射至第一搜索空间或第二搜索空 间，所述第一搜索空间用于承载公共控制信息，所述第二搜索空间用于承载针对所述终端设备的控制信息；
接收机804还用于根据第一调度信息，接收基站发送的多播业务数据。
应理解，在本发明实施例中，处理器801可以包括用于终端设备的音频/视频和逻辑功能的电路。例如，处理器801可以包括数字信号处理器设备、微处理器设备、模数转换器、数模转换器等等。可以根据这些设备各自的能力而在这些设备之间分配移动设备的控制和信号处理功能。处理器801还可以包括内部语音编码器VC、内部数据调制解调器DM等等。此外，处理器可以包括操作一个或多个软件程序的功能，所述软件程序可以存储在存储器中。通常，处理器和所存储的软件指令可以被配置为使终端设备执行动作。例如，处理器能够操作连接程序。。
存储器802可以包括只读存储器和随机存取存储器，并向处理器801提供指令和数据。存储器802的一部分还可以包括易失性存储器和/或非易失性存储器。例如，易失性存储器可以包括随机存取存储器RAM，其包括动态RAM和/或静态RAM、芯片上和/或芯片外高速缓冲存储器等等。非易失性存储器可以是嵌入式的和/或可移除的，其可以包括例如只读存储器、闪存存储器、磁性存储设备，例如硬盘、软盘驱动器、磁带等等、光盘驱动器和/或介质、非易失性随机存取存储器NVRAM等等。类似于易失性存储器，非易失性存储器可以包括用于数据的暂时存储的高速缓冲区域。易失性和/或非易失性存储器的至少一部分可以嵌入到处理器中。存储器可以存储一个或多个软件程序、指令、信息块、数据等等，其可以由所述终端设备用来执行移动终端的功能。例如，存储器可以包括能够唯一标识终端设备的标识符，诸如国际移动设备标志IMEI码。
在本发明实施例中，收发机可以包括例如红外收发机、使用收发机、无线通用串行总线USB收发机、蓝牙收发机等。蓝牙收发机能够根据低功耗或超低功耗蓝牙技术操作。尽管并未示出，终端设备能够根据各种无线联网技术通过发射机发送信号(或数据)，和/或通过接收机来接收信号(数据)。这些技术包括:Wi-Fi、Wi-Fi低功耗、WLAN技术，诸如IEEE 802.11技术、IEEE 802.15技术、IEEE 802.16技术等等。
在实现过程中，上述方法的各步骤可以通过处理器801中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的传输数据的 方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器、闪存、只读存储器、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器802，处理器801读取存储器802中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
根据本发明实施例的终端设备800的功能或上述操作，分别为了实现本发明实施例的传输数据的方法中由终端设备执行的相应流程。为了简洁，此处不再赘述。
在本发明实施例中，终端设备通过接收基站映射至第一搜索空间或第二搜索空间的用于接收多播业务数据的调度信息(即，第一调度信息)，从而终端设备能够根据第一调度信息，接收基站发送的多播业务数据。
图14示出了本发明实施例的基站900的示意性结构图。如图14所示，基站包括：一个或多个处理器901，一个或多个存储器902，一个或多个收发器(每个收发器包括发射机903和接收机904)，通过总线相连接。发射机903或接收机904与一个或多个天线905连接，并通过天线收发信号。存储器902中存储计算机程序指令(或者说，代码)。处理器801用于执行存储器802中存储的指令，当指令被执行时，
发射机903用于向终端设备发送第一调度信息，第一调度信息用于基站调度多播业务数据的发送，第一调度信息映射至第一搜索空间或第二搜索空间，第一调度信息映射至第一搜索空间或第二搜索空间；
发射机903还用于向终端设备发送多播业务数据。
应理解，在本发明实施例中，处理器901可以包括用于终端设备的音频/视频和逻辑功能的电路。例如，处理器901可以包括数字信号处理器设备、微处理器设备、模数转换器、数模转换器等等。可以根据这些设备各自的能力而在这些设备之间分配移动设备的控制和信号处理功能。处理器901还可以包括内部语音编码器VC、内部数据调制解调器DM等等。此外，处理器可以包括操作一个或多个软件程序的功能，所述软件程序可以存储在存储器中。通常，处理器和所存储的软件指令可以被配置为使终端设备执行动作。例如，处理器能够操作连接程序。。
存储器902可以包括只读存储器和随机存取存储器，并向处理器901提供指令和数据。存储器902的一部分还可以包括易失性存储器和/或非易失性 存储器。例如，易失性存储器可以包括随机存取存储器RAM，其包括动态RAM和/或静态RAM、芯片上和/或芯片外高速缓冲存储器等等。非易失性存储器可以是嵌入式的和/或可移除的，其可以包括例如只读存储器、闪存存储器、磁性存储设备，例如硬盘、软盘驱动器、磁带等等、光盘驱动器和/或介质、非易失性随机存取存储器NVRAM等等。类似于易失性存储器，非易失性存储器可以包括用于数据的暂时存储的高速缓冲区域。易失性和/或非易失性存储器的至少一部分可以嵌入到处理器中。存储器可以存储一个或多个软件程序、指令、信息块、数据等等，其可以由所述终端设备用来执行移动终端的功能。例如，存储器可以包括能够唯一标识终端设备的标识符，诸如国际移动设备标志IMEI码。
在本发明实施例中，收发机可以包括例如红外收发机、使用收发机、无线通用串行总线USB收发机、蓝牙收发机等。蓝牙收发机能够根据低功耗或超低功耗蓝牙技术操作。尽管并未示出，基站能够根据各种无线联网技术通过发射机发送信号(或数据)，和/或通过接收机来接收信号(数据)。这些技术包括:Wi-Fi、Wi-Fi低功耗、WLAN技术，诸如IEEE 802.11技术、IEEE802.15技术、IEEE 802.16技术等等。
在实现过程中，上述方法的各步骤可以通过处理器901中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的传输数据的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器、闪存、只读存储器、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器902，处理器901读取存储器902中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
根据本发明实施例的基站900的功能或上述操作，分别为了实现本发明实施例的传输数据的方法中由基站执行的相应流程。为了简洁，此处不再赘述。
在本发明实施例中，基站通过将终端设备接收多播业务数据的调度信息(即，第一调度信息)映射至第一搜索空间或第二搜索空间，将该第一调度信息发送给终端设备，使得终端设备能够接收到该第一调度信息。从而终端设备根据该第一调度信息，能够接收多播业务数据。
应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味 着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
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，所述单元的划分，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。
所述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。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在 一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (36)

  1. 一种传输数据的方法，其特征在于，所述方法包括：
    终端设备接收基站发送的第一调度信息，所述第一调度信息用于所述基站调度多播业务数据的发送，所述第一调度信息映射至第一搜索空间或第二搜索空间，所述第一搜索空间用于承载公共控制信息，所述第二搜索空间用于承载针对所述终端设备的控制信息；
    所述终端设备根据所述第一调度信息，接收所述基站发送的多播业务数据。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备接收基站发送的第一调度信息，包括：
    所述终端设备接收基站发送的第一控制信息，所述第一控制信息中携带时间信息和/或频率信息，其中，所述时间信息用于指示承载所述第一调度信息的子帧，所述频率信息用于指示所述基站发送所述第一调度信息时使用的频段；
    所述终端设备确定所述时间信息和/或频率信息；
    所述终端设备根据所述时间信息和/或频率信息，接收所述基站发送的第一调度信息。
  3. 根据权利要求2所述的方法，其特征在于，所述第一调度信息映射至所述第一搜索空间，所述第一控制信息中包括第一时间信息，
    所述终端设备接收基站发送的第一调度信息，包括：
    所述终端设备在所述第一时间信息所指示的子帧上监测所述第一搜索空间，接收所述基站发送的所述第一调度信息。
  4. 根据权利要求3所述的方法，其特征在于，所述终端设备处于连接态。
  5. 根据权利要求3或4所述的方法，其特征在于，所述第一控制信息中还包括第一频率信息，所述第一频率信息用于指示第一频段，
    所述终端设备接收基站发送的第一调度信息，包括：
    所述终端设备在所述第一频段上监测所述第一搜索空间，接收所述基站发送的所述第一调度信息。
  6. 根据权利要求2所述的方法，其特征在于，所述第一调度信息映射至第二搜索空间，所述第一控制信息中包括第二时间信息，
    所述终端设备接收基站发送的第一调度信息，包括：
    所述终端设备在所述第二时间信息所指示的子帧上监测所述第二搜索空间，接收所述基站发送的所述第一调度信息。
  7. 根据权利要求6所述的方法，其特征在于，所述终端设备处于空闲态。
  8. 根据权利要求6或7所述的方法，其特征在于，所述第一控制信息还包括第二频率信息，所述第二频率信息用于指示第二频段；
    所述终端设备接收基站发送的第一调度信息，包括：
    所述终端设备在所述第二频段上监测所述第二搜索空间，接收所述基站发送的第一调度信息。
  9. 根据权利要求2至8中任一项所述的方法，其特征在于，所述终端设备接收基站发送的第一控制信息，包括：
    所述终端设备接收所述基站发送的系统消息，所述系统消息中包括第三时间信息，所述第三时间信息用于指示承载第二调度信息的子帧，所述第二调度信息用于所述基站调度所述第一控制信息的发送，所述第二调度信息映射至第一搜索空间；
    所述终端设备确定所述第三时间信息所指示的子帧；
    所述终端设备在所述第三时间信息所指示的子帧上接收所述第二调度信息；
    所述终端设备根据所述第二调度信息，接收所述第一控制信息。
  10. 根据权利要求9所述的方法，其特征在于，所述系统消息中还包括第三频率信息，所述第三频率信息用于指示所述基站发送所述第二调度信息时使用的第三频段，
    所述终端设备接收基站发送的第二调度信息，包括：
    所述终端设备确定所述第三频段；
    所述终端设备在所述第三频段上接收所述基站发送的所述第二调度信息。
  11. 一种传输数据的方法，其特征在于，所述方法包括：
    基站向终端设备发送第一调度信息，所述第一调度信息用于所述基站调度多播业务数据的发送，所述第一调度信息映射至第一搜索空间或第二搜索空间，所述第一搜索空间用于承载公共控制信息，所述第二搜索空间用于承 载针对所述终端设备的控制信息；
    所述基站向所述终端设备发送所述多播业务数据。
  12. 根据权利要求11所述的方法，其特征在于，所述基站向终端设备发送第一调度信息，包括：
    所述基站向所述终端设备发送第一控制信息，所述第一控制信息用于所述基站控制所述第一调度信息的发送，所述第一控制信息中包括时间信息和/或频率信息，所述时间信息用于指示承载所述第一调度信息的子帧，所述频率信息用于指示所述基站发送所述第一调度信息时使用的频段；
    所述基站根据所述时间信息和/或频率信息，向所述终端设备发送所述第一调度信息。
  13. 根据权利要求12所述的方法，其特征在于，所述第一调度信息映射至所述第一搜索空间，所述第一控制信息中包括第一时间信息，
    所述基站向所述终端设备发送第一调度信息，包括：
    所述基站在所述第一时间信息所指示的子帧上向所述终端设备发送所述第一调度信息。
  14. 根据权利要求12或13所述的方法，其特征在于，所述第一控制信息中包括第一频率信息，所述第一频率信息用于指示第一频段，
    所述基站向所述终端设备发送第一调度信息，包括：
    所述基站在所述第一频段上向所述终端设备发送所述第一调度信息。
  15. 根据权利要求12所述的方法，其特征在于，所述第一调度信息映射至所述第二搜索空间，所述第一控制信息中包括第二时间信息，
    所述基站向所述终端设备发送第一调度信息，包括：
    所述基站在所述第二时间信息所指示的子帧上向所述终端设备发送所述第一调度信息。
  16. 根据权利要求15所述的方法，其特征在于，所述第一控制信息中还包括第二频率信息，所述第二频率信息用于指示第二频段，
    所述基站向所述终端设备发送第一调度信息，包括：
    所述基站在所述第二频段上向所述终端设备发送所述第一调度信息。
  17. 根据权利要求12至16中任一项所述的方法，其特征在于，所述基站向所述终端设备发送第一控制信息，包括：
    所述基站向所述终端设备发送系统消息，所述系统消息中包括第三时间 信息，所述第三时间信息用于指示承载第二调度信息的子帧，所述第二调度信息用于所述基站调度所述第一控制信息的发送，所述第二调度信息映射至所述第一搜索空间；
    所述基站根据所述第三时间信息，在所述第三时间信息所指示的子帧上向所述终端设备发送第二调度信息；
    所述基站向所述终端设备发送第一控制信息。
  18. 根据权利要求12至17中任一项所述的方法，其特征在于，所述系统消息中包括第三频率信息，所述第三频率信息用于指示所述基站发送所述第二调度信息时使用的第三频段，
    所述基站根据所述第三频率信息，在所述第三频段上向所述终端设备发送所述第二调度信息。
  19. 一种终端设备，其特征在于，所述终端设备包括：
    接收单元，用于接收基站发送的第一调度信息，所述第一调度信息用于所述基站调度多播业务数据的发送，所述第一调度信息映射至第一搜索空间或第二搜索空间，所述第一搜索空间用于承载公共控制信息，所述第二搜索空间用于承载针对所述终端设备的控制信息；
    所述接收单元还用于根据所述第一调度信息，接收所述基站发送的多播业务数据。
  20. 根据权利要求19所述的终端设备，其特征在于，所述接收单元具体用于：
    接收所述基站发送的第一控制信息，所述第一控制信息中携带时间信息和/或频率信息，所述时间信息用于指示承载所述第一调度信息的子帧，所述频率信息用于指示所述基站发送所述第一调度信息时使用的频段；
    以及，所述终端设备还包括：
    处理单元，用于确定所述时间信息和/或频率信息；
    所述处理单元具体还用于根据所述时间信息和/或频率信息，接收所述基站发送的第一调度信息。
  21. 根据权利要求20所述的终端设备，其特征在于，所述第一调度信息映射至所述第一搜索空间，所述第一控制信息中包括第一时间信息，
    以及，所述接收单元具体用于，在所述第一时间信息所指示的子帧上监测所述第一搜索空间，接收所述基站发送的所述第一调度信息。
  22. 根据权利要求21所述的终端设备，其特征在于，所述终端设备处于连接态。
  23. 根据权利要求21或22所述的终端设备，其特征在于，所述第一控制信息中包括第一频率信息，所述第一频率信息用于指示第一频段，
    以及，所述接收单元具体用于，在所述第一频段上监测所述第一搜索空间，接收所述基站发送的所述第一调度信息。
  24. 根据权利要求20所述终端设备，其特征在于，所述第一调度信息映射至第二搜索空间，所述第一控制信息中包括第二时间信息，
    以及，所述接收单元具体用于，在所述第二时间信息所指示的子帧上监测所述第二搜索空间，接收所述基站发送的所述第一调度信息。
  25. 根据权利要求24所述的终端设备，其特征在于，所述终端设备处于空闲态。
  26. 根据权利要求24或25所述的终端设备，其特征在于，所述第一控制信息包括第二频率信息，所述第二频率信息用于指示第二频段；
    以及，所述终端设备具体用于，在所述第二频段上监测所述第二搜索空间，接收所述基站发送的第一调度信息。
  27. 根据权利要求20至26中任一项所述的终端设备，其特征在于，所述接收单元具体用于：
    接收所述基站发送的系统消息，所述系统消息中包括第三时间信息，所述第三时间信息用于指示承载第二调度信息的子帧，所述第二调度信息用于所述基站调度所述第一控制信息的发送，所述第二调度信息映射至第一搜索空间；
    所述处理单元还用于确定所述第三时间信息所指示的子帧；
    所述接收单元具体用于在所述第三时间信息所指示的子帧上接收所述第二调度信息；
    根据所述第二调度信息，接收所述第一控制信息。
  28. 根据权利要求27所述的终端设备，其特征在于，所述系统消息中还包括第三频率信息，所述第三频率信息用于指示所述基站发送所述第二调度信息时使用的第三频段，
    以及，所述处理单元还用于确定所述第三频段；
    以及，所述接收单元具体用于，在所述第三频段上接收所述基站发送的 所述第二调度信息。
  29. 一种基站，其特征在于，所述基站包括：
    发送单元，用于向终端设备发送第一调度信息，所述第一调度信息用于所述基站调度多播业务数据的发送，所述第一调度信息映射至第一搜索空间或第二搜索空间，所述第一搜索空间用于承载公共控制信息，所述第二搜索空间用于承载针对所述终端设备的控制信息；
    所述发送单元还用于向所述终端设备发送多播业务数据。
  30. 根据权利要求29所述的基站，其特征在于，所述发送单元具体用于：
    向所述终端设备发送第一控制信息，所述第一控制信息用于所述基站控制所述第一调度信息的发送，所述第一控制信息中包括时间信息和/或频率信息，所述时间信息用于指示承载所述第一调度信息的子帧，所述频率信息用于指示所述基站发送所述第一调度信息时使用的频段；
    以及，所述基站还包括：
    处理单元，用于确定所述时间信息和/或频率信息；
    以及，所述发送单元具体用于根据所述时间信息和/或频率信息，向所述终端设备发送所述第一调度信息。
  31. 根据权利要求30所述的基站，其特征在于，所述第一调度信息映射至所述第一搜索空间，所述第一控制信息中包括第一时间信息，
    以及，所述发送单元具体用于，在所述第一时间信息所指示的子帧上向所述终端设备发送所述第一调度信息。
  32. 根据权利要求30或31所述的基站，其特征在于，所述第一控制信息中包括第一频率信息，所述第一频率信息用于指示第一频段，
    以及，所述发送单元具体用于，在所述第一频段上向所述终端设备发送所述第一调度信息。
  33. 根据权利要求30所述的基站，其特征在于，所述第一调度信息映射至所述第二搜索空间，所述第一控制信息中包括第二时间信息，
    以及，所述发送单元具体用于，在所述第二时间信息所指示的子帧上向所述终端设备发送所述第一调度信息。
  34. 根据权利要求33所述的基站，其特征在于，所述第一控制信息中还包括第二频率信息，所述第二频率信息用于指示第二频段，
    以及，所述发送单元具体用于，在所述第二频段上向所述终端设备发送所述第一调度信息。
  35. 根据权利要求30至34中任一项所述的基站，其特征在于，所述发送单元具体用于：
    向所述终端设备发送系统消息，所述系统消息中包括第三时间信息，所述第三时间信息用于指示承载第二调度信息的子帧，所述第二调度信息用于所述基站调度所述第一控制信息的发送，所述第二调度信息映射至所述第一搜索空间；
    以及，所述处理单元还用于确定所述第三时间信息；
    以及，所述发送单元具体用于根据所述第三时间信息，在所述第三时间信息所指示的子帧上向所述终端设备发送第二调度信息；
    向所述终端设备发送第一控制信息。
  36. 根据权利要求30至35中任一项所述的基站，其特征在于，所述系统消息中包括第三频率信息，所述第三频率信息用于指示所述基站发送所述第二调度信息时使用的第三频段，
    以及，所述处理单元还用于确定所述第三频段；
    以及，所述发送单元具体用于，在所述第三频段上向所述终端设备发送第二调度信息。
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