WO2021081827A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2021081827A1
WO2021081827A1 PCT/CN2019/114451 CN2019114451W WO2021081827A1 WO 2021081827 A1 WO2021081827 A1 WO 2021081827A1 CN 2019114451 W CN2019114451 W CN 2019114451W WO 2021081827 A1 WO2021081827 A1 WO 2021081827A1
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WO
WIPO (PCT)
Prior art keywords
cell
terminal device
configuration information
mbms
network device
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PCT/CN2019/114451
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English (en)
French (fr)
Inventor
黄曲芳
酉春华
吴烨丹
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2019/114451 priority Critical patent/WO2021081827A1/zh
Priority to CN201980101646.XA priority patent/CN114600472B/zh
Publication of WO2021081827A1 publication Critical patent/WO2021081827A1/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to the field of mobile communication technology, and in particular to communication methods and devices.
  • NTN non-terrestrial network
  • the network equipment is deployed on the satellite.
  • the cell of the satellite will also move accordingly. Therefore, the cell covering the terminal equipment will also change accordingly. For example, at time T1, cell 1 of satellite 1 covers the terminal equipment. As the satellite moves, at time T2, cell 1 no longer covers the terminal equipment, but cell 2 of satellite 2 covers the terminal equipment.
  • the two cells cover the terminal device at the same time (that is, the overlapping area covers the terminal device).
  • the prior art method is: when cell 1 covers the terminal device, the terminal device first Receive MBMS configuration information from the cell, and then receive MBMS data from cell 1 according to the configuration information.
  • MBMS multimedia broadcast multicast service
  • the disadvantage of the above method is that the time delay for receiving MBMS data is relatively large.
  • the present application provides a communication method and device to reduce the time delay of receiving MBMS data.
  • the present application provides a communication method, including: a network device obtains first configuration information of MBMS of a first cell before the first cell covers a terminal device, where the terminal device is a terminal device covered by a second cell, The network device corresponds to the second cell; the network device sends the first configuration information to the terminal device, where the first configuration information is used after the first cell covers the terminal device, The terminal device receives MBMS data from the first cell.
  • the network equipment can obtain the MBMS configuration information of the first cell in advance and send it to the terminal equipment under the coverage of the second cell, so that when After the first cell covers the terminal device, it does not need to receive the MBMS configuration information from the first cell, but directly starts to receive the MBMS data from the first cell according to the pre-received first configuration information of the MBMS. Therefore, this solution can reduce the waiting time for receiving MBMS data and reduce the time delay.
  • the network device before the network device sends the first configuration information to the terminal device, the network device receives a request from the first terminal device in the second cell to obtain the configuration of the first MBMS Information message; according to the message, the network device determines to send the first configuration information to some or all of the terminal devices covered by the second cell, where the part of the terminal devices includes the first terminal device.
  • This solution determines to send the first configuration information to the terminal device based on the request of the terminal device, which helps reduce redundant transmission of the first configuration information, thereby improving communication quality.
  • the network device determines that the first cell will cover the second terminal device in the second cell, It is determined to send the first configuration information to part or all of the terminal devices covered by the second cell.
  • the part or all of the terminal devices include the second terminal device.
  • the network device determines to send the first configuration information to the terminal device, without determining to send the first configuration information to the terminal device based on the request of the terminal device, which helps reduce the signaling overhead of the terminal device.
  • the sending of the first configuration information by the network device to the terminal device covered by the second cell includes: the network device sends the first configuration information to the second cell by broadcast, unicast, or multicast.
  • the terminal equipment covered by the second cell sends the first configuration information.
  • the network device after the network device sends the first configuration information to the terminal device covered by the second cell, the network device starts a timer; the network device determines that the first configuration information is updated And it is determined that the timer has not expired, sending the updated first configuration information to the terminal device covered by the second cell. Based on this solution, the first configuration information can be updated, that is, the terminal device can receive the updated first configuration information, which helps to improve the communication quality.
  • the network device before the network device obtains the first configuration information of the multimedia broadcast multicast service MBMS of the first cell, it determines that the first cell is a mobile cell, and then determines to obtain the first configuration information. Based on this solution, when the network device determines that the first cell is a mobile cell, it determines to acquire the first configuration information, which helps reduce the overhead of the network device.
  • the network device sends second configuration information of the MBMS service of the second cell to the terminal device covered by the second cell, and the second configuration information is used by the terminal device to slave The second cell receives MBMS service data.
  • the first configuration information includes at least one of the following: the identifier of the MBMS service, the time domain resource of the data transmission of the MBMS service, the frequency domain resource of the data transmission of the MBMS service, and the data transmission of the MBMS service
  • the length of the used TTI, the subcarrier interval used for data transmission of the MBMS service, the length of the cyclic prefix CP used for the data transmission of the MBMS service, the power used for the data transmission of the MBMS service, and the power used for the data transmission of the MBMS service The key used for pilot and MBMS service data transmission.
  • the present application provides a communication method, including: before the first cell covers a terminal device, receiving first configuration information of MBMS of the first cell, and the terminal device is located in the coverage area of the second cell; After the first cell covers the terminal device, receiving the MBMS data of the first cell according to the first configuration information.
  • the network equipment can obtain the MBMS configuration information of the first cell in advance and send it to the terminal equipment under the coverage of the second cell, so that when After the first cell covers the terminal device, it does not need to receive the MBMS configuration information from the first cell, but directly starts to receive the MBMS data from the first cell according to the pre-received first configuration information of the MBMS. Therefore, this solution can reduce the waiting time for receiving MBMS data and reduce the time delay.
  • the terminal device before receiving the first configuration information of the MBMS of the first cell, send information indicating that the first cell will cover the terminal device.
  • This solution determines to send the first configuration information to the terminal device based on the request of the terminal device, which helps reduce redundant transmission of the first configuration information, thereby improving communication quality.
  • the receiving the first configuration information of the MBMS of the first cell includes: receiving the first configuration information in a broadcast manner, a unicast manner, or a multicast manner.
  • the second configuration information of the MBMS service of the second cell is received; and the data of the MBMS service of the second cell is received according to the second configuration information.
  • this application provides a communication device, which may be a network device (such as an access network device or a DU), or a chip used for the network device.
  • the device has the function of realizing the above-mentioned first aspect or each embodiment of the first aspect. This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the present application provides a communication device, which may be a terminal device or a chip used for the terminal device.
  • the device has the function of realizing the above-mentioned second aspect or each embodiment of the second aspect. This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the present application provides a communication device, including: a processor and a memory; the memory is used to store computer execution instructions, and when the device is running, the processor executes the computer execution instructions stored in the memory to enable the The device executes the methods described in the above aspects.
  • the device may be a network device (such as an access network device or a DU) or a chip for a network device, or a terminal device or a chip for a terminal device.
  • the present application provides a communication device, including: including units or means for executing each step of the above-mentioned aspects.
  • the device can be a network device (such as an access network device or DU) or a terminal device.
  • the present application provides a communication device, including a processor and an interface circuit, where the processor is configured to implement the methods described in the foregoing aspects through the interface circuit.
  • the processor includes one or more.
  • the device may be a network device (such as an access network device or a DU) or a chip for a network device, or a terminal device or a chip for a terminal device.
  • the present application provides a communication device, including a processor, coupled or interacting with a memory, and configured to call a program stored in the memory to execute the methods described in the foregoing aspects.
  • the memory can be located inside the device or outside the device.
  • the processor includes one or more.
  • the device may be a network device (such as an access network device or a DU) or a chip for a network device, or a terminal device or a chip for a terminal device.
  • the present application also provides a computer-readable storage medium having instructions stored in the computer-readable storage medium, which when run on a computer, cause a processor to execute the methods described in the foregoing aspects.
  • this application also provides a computer program product including instructions, which when run on a computer, causes the computer to execute the methods described in the above aspects.
  • the present application also provides a chip system, including a processor, configured to execute the methods described in the foregoing aspects.
  • the present application also provides a communication system, including a network device used to implement the foregoing first aspect or each embodiment of the first aspect, and a network device used to implement the foregoing second aspect or each implementation of the second aspect Example of terminal equipment.
  • Figure 1 is a schematic diagram of a network architecture applicable to this application
  • Figure 2A is a schematic diagram of an application scenario to which this application applies;
  • FIG. 2B is a schematic diagram of another application scenario to which this application applies.
  • FIG. 3 is a schematic diagram of a communication method provided by this application.
  • FIG. 4 is a schematic diagram of a communication device provided by this application.
  • FIG. 5 is a schematic diagram of another communication device provided by this application.
  • Figure 6 is a schematic diagram of a terminal device provided by this application.
  • Fig. 7 is a schematic diagram of a network device provided by this application.
  • FIG. 1 it is a schematic diagram of a network architecture to which this application applies, including terminal equipment and network equipment.
  • Network equipment is deployed on high-altitude mobile platforms, such as satellites, hot air balloons, and mobile drones.
  • the terminal device communicates with the network device through a wireless interface.
  • a terminal device is a device with a wireless transceiver function.
  • the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as aircraft, Balloons and satellites are classy).
  • the terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, industrial control ( Wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation safety (transportation)
  • the wireless terminal in safety the wireless terminal equipment in the smart city (smart city), the wireless terminal in the smart home (smart home), and may also include user equipment (UE) and so on.
  • UE user equipment
  • a network device is a device in a wireless network, such as a radio access network (RAN) device that connects a terminal device to the wireless network.
  • RAN equipment include: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (RNC), Node B (Node B) B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit) , BBU), or wireless fidelity (Wifi) access point (AP), integrated access and backhaul (IAB), etc.
  • the network device in the embodiment of the present application may be any of the above-mentioned RAN devices, or may be a distributed unit (DU).
  • the RAN device in this application is also called an access network device.
  • the logical system of the access network equipment can adopt a centralized unit (CU) and DU separation mode.
  • the CU-DU logic system can be divided into two types, namely the CU-DU separation architecture and the CU-DU fusion architecture.
  • the functions of the NR protocol stack can be dynamically configured and divided, some of which are implemented in the CU, and the remaining functions are implemented in the DU.
  • the interface between CU and DU should comply with 3GPP specifications. Aiming at the CU-DU converged architecture, the logical functions of CU and DU are integrated in the same access network device to realize all the functions of the protocol stack.
  • the network equipment in this application is deployed in the NTN system.
  • the NTN system may include a satellite communication system, a high altitude platform (HAPS) communication system, or other non-terrestrial communication systems. It should be noted that as long as the network equipment can predict which cell will cover which terminal equipment, the solution of this application can be used.
  • HAPS high altitude platform
  • FIG. 2A it is a schematic diagram of an application scenario to which this application applies.
  • the RAN equipment is deployed on the satellite, and the RAN equipment does not distinguish between CU and DU.
  • FIG. 2B it is a schematic diagram of another application scenario to which this application applies.
  • RAN equipment distinguishes between CU and DU, where DU is deployed on the satellite and CU is deployed on the ground.
  • the present application provides a communication method.
  • the method may be executed by the terminal device or a component (for example, a chip or a circuit, etc.) used in the terminal device.
  • the method may be executed by a network device (which may be a RAN device or a DU) or a component used for the network device (for example, a chip or a circuit, etc.).
  • a network device which may be a RAN device or a DU
  • a component used for the network device for example, a chip or a circuit, etc.
  • the method includes the following steps:
  • Step 301 The network device obtains the first configuration information of the MBMS of the first cell before the first cell covers the terminal device.
  • the terminal equipment here refers to the terminal equipment under the coverage of the second cell.
  • the first cell here may be a cell that will cover the terminal device, that is, a cell after the second cell that will cover the terminal device.
  • the second cell here refers to cell 1
  • the first cell refers to cell 2.
  • the first cell here may also be a cell that will cover the terminal device at a certain time in the future.
  • the second cell here refers to cell 1
  • the first cell refers to one of cell 2 to cell 5. Or multiple cells.
  • the first cell here may also be one or more cells designated by the terminal device. As an example, suppose that cell 1 to cell 5 sequentially cover UE1, UE1 is currently under the coverage of cell 1, and UE1 requests the network device to obtain the configuration information of the MBMS service of cell 3.
  • the cell here refers to cell 3.
  • the second cell here is a cell under the network device, that is, the second cell corresponds to the network device, or it can also be said that the second cell is a cell managed by the network device or the second cell belongs to the network equipment.
  • the first cell here may be a cell under the network device or a cell under other network devices.
  • Step 302 The network device sends first configuration information to the terminal device before the first cell covers the terminal device. After the first configuration information is used for the first cell to cover the terminal device, the terminal device receives MBMS data from the first cell.
  • the network device may send the first configuration information to the terminal device in a unicast, broadcast or multicast manner.
  • Step 303 After the first cell covers the terminal device, the terminal device receives the MBMS data of the first cell according to the first configuration information.
  • the network equipment can obtain the MBMS configuration information of the first cell in advance and send it to the terminal equipment under the coverage of the second cell, so that when After the first cell covers the terminal device, it does not need to receive the MBMS configuration information from the first cell, but directly starts to receive the MBMS data from the first cell according to the pre-received first configuration information of the MBMS. Therefore, this solution can reduce the waiting time for receiving MBMS data and reduce the time delay.
  • the method for the network device to obtain the first configuration information of the MBMS of the first cell includes but is not limited to:
  • Method 1 When the network device is a RAN device, and the first cell and the second cell are both cells under the RAN device, the RAN device can store the first configuration information of the MBMS of the first cell, so the RAN device can Obtain the first configuration information locally.
  • Method 2 When the network device is a RAN device, and the second cell is a cell under the RAN device, and the first cell is a cell under another RAN device, the RAN device can request the other RAN device to obtain the MBMS of the first cell
  • the configuration information of the first cell may also be based on subscription, and the other RAN device sends the MBMS configuration information of the first cell to the RAN device.
  • the above method 1 and method 2 are for the scenario shown in FIG. 2A.
  • Method 3 When the network equipment is a DU, and the first cell and the second cell are both cells under the DU, the first configuration information of the MBMS of the first cell can be stored on the DU, so the DU can be obtained locally The first configuration information; or, the first configuration information of the MBMS of the first cell is stored on the CU, so the DU can obtain the first configuration information from the CU.
  • Method 4 when the network equipment is a DU, the second cell is a cell under the DU, and the first cell is a cell under other DUs, the first configuration information of the MBMS of the first cell can be stored on the CU.
  • the DU may obtain the first configuration information from the CU.
  • the above method 3 and method 4 are for the scenario shown in FIG. 2B.
  • the method may further include: the network device determines to send the first configuration information of the MBMS of the first cell to part or all of the terminal devices covered by the second cell. It can be understood that this step is a triggered action, that is, when the network device determines that it needs to send the first configuration information of the MBMS of the first cell to the terminal device covered by the second cell, it can perform the above step 302.
  • the following describes several implementation methods for the network device to determine that it needs to send the first configuration information of the MBMS of the first cell to some or all of the terminal devices covered by the second cell.
  • Method A Before the network device sends the first configuration information to the terminal device covered by the second cell, the first terminal device in the second cell sends a message requesting to obtain the configuration information of the first MBMS to the network device (for example, the message may be Is a request message), the network device determines according to the message to send the first configuration information to part or all of the terminal devices covered by the second cell.
  • the network device when one or more terminal devices (such as the first terminal device) in the coverage area of the second cell request the network device to obtain the configuration information of a particular MBMS (such as the first MBMS), the network device One or more terminal devices (such as all terminal devices) covered by the second cell send the first configuration information of the MBMS of the first cell.
  • the MBMS of the first cell here may be the first MBMS or all the MBMSs in the first cell (including the MBMS being transmitted, the MBMS to be transmitted, the MBMS that has just completed transmission, etc.).
  • the network device can send the configuration information of MBMS1 of the first cell to UE1, UE2, and UE3, or the configuration information of MBMS1, MBMS2, and MBMS3 Send to UE1, UE2, and UE3.
  • the configuration information of MBMS1 of the first cell may also be sent to UE1, or the configuration information of MBMS1, MBMS2, and MBMS3 may also be sent to UE1. I will not list them one by one here.
  • the network device may send the first configuration information to part or all of the terminal devices covered by the second cell in a broadcast manner, a unicast manner, or a multicast manner.
  • determining to send the first configuration information to the terminal device based on the request of the terminal device helps reduce redundant transmission of the first configuration information, thereby improving communication quality.
  • Method B Before the network equipment sends the first configuration information to the terminal equipment covered by the second cell, it is determined that the first cell will cover the second terminal equipment in the second cell, and then it is determined to cover part or all of the terminals in the second cell. The device sends the first configuration information.
  • the network device when the network device determines that the first cell will cover a certain terminal device (such as the second terminal device) in the second cell, the network device reports to one or more terminal devices (such as all of the terminal devices) covered by the second cell.
  • the terminal equipment of the first cell sends the first configuration information of the MBMS of the first cell.
  • the MBMS of the first cell here may be all the MBMS in the first cell (including the MBMS being transmitted, the MBMS to be transmitted, the MBMS that has just completed transmission, etc.).
  • the network device determines that the first cell will cover UE1, the network device can send the configuration information of MBMS1, MBMS2, and MBMS3 of the first cell to UE1, UE2, and UE3.
  • the configuration information of MBMS1, MBMS2, and MBMS3 may be sent to UE1, or UE1 and UE2.
  • the network device may send the first configuration information to part or all of the terminal devices covered by the second cell in a broadcast manner, a unicast manner, or a multicast manner.
  • the method for the network device to determine that the first cell will cover the second terminal device in the second cell includes but is not limited to:
  • the second terminal device sends to the network device information indicating that the first cell will cover the second terminal device.
  • the terminal device may indicate to the network device through a notification message or other messages that the first cell will cover the second terminal device.
  • the network equipment determines that the first cell will cover the second terminal equipment in the second cell according to the trajectory of the satellite operation.
  • the trajectory of satellite operation shows that cell 1 to cell 4 will sequentially cover UE1, where cell 1 is the cell currently covering UE1, called the second cell, and cell 2 is the cell that will cover UE1, called the first cell.
  • the network device determines to send the first configuration information to the terminal device, and there is no need to determine to send the first configuration information to the terminal device based on the request of the terminal device, which helps reduce the signaling overhead of the terminal device.
  • Method C Before the network device sends the first configuration information to the terminal device covered by the second cell, it is determined that the first cell will cover the second terminal device in the second cell, and the second terminal device is determined to be interested in the MBMS service, It is determined to send the first configuration information to part or all of the terminal devices covered by the second cell.
  • the network device when the network device determines that the first cell will cover a certain terminal device (such as the second terminal device) in the second cell, and determines that the second terminal device is interested in the MBMS service, the network device sends the message to the second cell.
  • One or more terminal devices (such as all terminal devices) covered by the cell send the first configuration information of the MBMS of the first cell.
  • the MBMS of the first cell here may be all the MBMS in the first cell (including the MBMS being transmitted, the MBMS to be transmitted, the MBMS that has just completed transmission, etc.).
  • the network device determines that the first cell will cover UE1 and determines that UE1 is interested in MBMS services, the network device can send the configuration information of MBMS1, MBMS2, and MBMS3 of the first cell to UE1, UE2, and UE3. Or, the configuration information of MBMS1, MBMS2, and MBMS3 may also be sent to UE1.
  • the network device can send the first configuration information to part or all of the terminal devices covered by the second cell in a broadcast mode, a unicast mode, or a multicast mode.
  • the method for the network device to determine that the first cell will cover the second terminal device in the second cell includes but is not limited to:
  • the second terminal device sends to the network device information indicating that the first cell will cover the second terminal device and that the second terminal device is interested in the MBMS service.
  • the terminal device may indicate to the network device through a notification message or other messages that the first cell will cover the second terminal device and that the second terminal device is interested in the MBMS service.
  • the "second terminal device is interested in MBMS services" described in the embodiments of this application may be, for example, the application layer of the second terminal device indicates that the user is interested in a certain MBMS service.
  • the second terminal device is interested in the MBMS service can be understood as: the second terminal device can receive the MBMS service.
  • the network device determines that the first cell will cover the second terminal device in the second cell according to the trajectory of the satellite operation, and determines that the second terminal device is interested in the MBMS service according to the pre-configuration information or the notification of the second terminal device.
  • the trajectory of satellite operation shows that cell 1 to cell 4 will sequentially cover UE1, where cell 1 is the cell currently covering UE1, called the second cell, and cell 2 is the cell that will cover UE1, called the first cell.
  • the pre-configuration information here may be, for example, that the network manager configures the MBMS service of interest corresponding to each terminal device on the network device in advance.
  • the RAN device determines to send the first configuration information to the terminal device covered by the second cell; when the network device is a DU, the DU determines to send the first configuration information to the second cell The covered terminal device sends the first configuration information.
  • the network device when the network device is a DU, it may also be determined by the CU to send the first configuration information to the terminal device covered by the second cell, where the CU determines to send the first configuration information to the terminal device covered by the second cell.
  • the method is similar to the above method A to method C, and the foregoing description can be referred to, and the details are not repeated here.
  • the CU may notify the DU to send the first configuration information to the terminal device covered by the second cell.
  • the broadcast mode in any of the foregoing implementation methods may be, for example, a network device sending a broadcast multicast control channel (multicast control channel, MCCH) message.
  • the unicast mode in any of the foregoing implementation methods may be, for example, a network device sending dedicated signaling.
  • the multicast mode in any of the foregoing implementation methods for example, may be an MCCH message, and a group radio network temporary identifier (G-RNTI) may be added to the MCCH message to indicate a group.
  • G-RNTI group radio network temporary identifier
  • the network device can also obtain the second configuration information of the MBMS of the second cell, and send the second configuration information to the terminal device covered by the second cell, and the second configuration information is used for
  • the terminal device receives MBMS data from the second cell.
  • the terminal device receives the MBMS data of the second cell according to the second configuration information.
  • the network device may also start a timer; the network device determines that the first configuration information has been updated and that the timer has not expired, then the network device covers the second cell The terminal device sends the updated first configuration information. That is, within the time range when the timer does not expire, if the first configuration information is updated, the network device may send the updated first configuration information to the terminal device.
  • the network device may not immediately send the updated first configuration information to the terminal device, but may wait until the network device determines that it needs to send the MBMS configuration information of the first cell to the terminal device, and then based on the foregoing figure
  • the MBMS configuration information of the first cell is sent to the terminal device, or the network device determines that it is no longer necessary to send the MBMS configuration information of the first cell to the terminal device, and no longer sends the first cell configuration information to the terminal device.
  • MBMS configuration information of a cell Based on this solution, the first configuration information can be updated, that is, the terminal device can receive the updated first configuration information, which helps to improve the communication quality.
  • a timer can also be configured on the terminal device.
  • the terminal device When the terminal device is located in the second cell, it starts after receiving the first configuration information of the MBMS of the first cell sent by the network device. Timer, if the terminal device has not moved to the first cell after the timer expires, the terminal device can discard or delete the first configuration information, so as to save the overhead of the terminal device.
  • the network device determines that the first cell is a mobile cell. That is, the first cell being a mobile cell is used as a condition for triggering the network device to obtain the first configuration information of the MBMS of the first cell.
  • the mobile cell here includes but is not limited to: satellite cell, drone cell, hot air balloon cell, etc. Based on this solution, when the network device determines that the first cell is a mobile cell, it determines to acquire the first configuration information, which helps reduce the overhead of the network device.
  • the terminal device can learn the time at which each cell covers its geographic location based on other information, it can directly at the corresponding point in time, according to the received in advance MBMS configuration information, receive MBMS data directly from the corresponding cell. For example, UE1 learns that the first cell will cover the geographic location of the UE during the time period from T1 to T2, and the UE can use the pre-received MBMS number of the first cell during the time period from T1 to T2. Configuration information, receiving MBMS data from the first cell.
  • the terminal device (take the first terminal device as an example) informs the network device of the first cell (may be called the first network device) that it wants to receive MBMS data (in the first configuration)
  • the first MBMS data corresponding to the information is taken as an example), so that after the terminal device subsequently moves to the first cell, the first network device can send the first MBMS data to the terminal device.
  • the manner in which the first terminal device notifies the first network device that it wants to receive the first MBMS data includes but is not limited to:
  • the second network device (that is, the network device that sends the first configuration information to the terminal device) is notified in the second cell that the first terminal device is about to enter the first cell.
  • the coverage of the cell hope to receive the data of the first MBMS.
  • the second network device notifies the first network device that the first terminal device is about to enter the coverage area of the first cell and wants to receive the data of the first MBMS.
  • the first terminal device After the first terminal device enters the coverage area of the first cell, it initiates random access to the first cell and informs the first network device in the first cell: the first terminal device has entered the coverage area of the first cell , Hope to receive the first MBMS data.
  • the network device may also temporarily not cover the terminal device of the second cell
  • the first configuration information is sent, but the first configuration information is not sent to the terminal device covered by the second cell until a suitable time (for example, the distance from the first cell to the terminal device covered by the terminal device is less than or equal to the first time period).
  • the foregoing first configuration information or second configuration information includes, but is not limited to, at least one of the following:
  • the identifier of the MBMS such as one or more of the session ID (session ID), G-RNTI, and logical channel ID (Logical Channel ID, LCH ID).
  • the time domain resources here can be, for example, the period of the window appearance, the time offset value at the beginning of the window, and the window size. These three parameters can be expressed in absolute time, such as Global Positioning System (GPS) time, or expressed in time units in the 5G system, such as the number of slots, the number of symbols, and the system frame number (System Frame Number, SFN), subframe number, etc.
  • GPS Global Positioning System
  • SFN System Frame Number, SFN
  • subframe number subframe number
  • the transmission time window of each MBMS may be the same, or overlap, or may be different. If the transmission time windows of two or more MBMSs are the same or overlap, in the overlapping part, two or more MBMSs may share G-RNTI and use different LCH IDs to distinguish them. If the transmission time windows of the two MBMSs do not overlap, the two MBMSs may not share the G-RNTI, or they may share the G-RNTI and use different LCH IDs to distinguish them.
  • the frequency domain resource here may be, for example, sub-band information.
  • the sub-band information can be an index information that indicates which part of the frequency band in the cell; the sub-band information can also be a bandwidth part (BWP) identifier, which indicates that MBMS is transmitted in a certain BWP; the sub-band information can also be a pair Frequency point information "start frequency point, end frequency point”.
  • BWP bandwidth part
  • TTI transmission time interval
  • Pilot frequency used for MBMS data transmission Pilot frequency used for MBMS data transmission.
  • the first configuration information includes: a subframe for MBMS data transmission (that is, a time domain resource for MBMS data transmission), GRNTI, and a logical channel identifier.
  • the method for the UE to receive the MBMS data of the first cell according to the first configuration information may be: after the UE receives the first configuration information, within the subframe range indicated by the first configuration information, use the first A GRNTI in the configuration information blindly detects the physical downlink control channel (Physical Downlink Control Channel, PDCCH), and then receives data on the logical channel indicated by the logical channel identifier according to the detected downlink control information (DCI).
  • PDCCH Physical Downlink Control Channel
  • a device for implementing any of the above methods.
  • a device is provided that includes units (or means) for implementing each step performed by the terminal device in any of the above methods.
  • another device is also provided, including a unit (or means) for implementing each step executed by the network device in any of the above methods.
  • FIG. 4 is a schematic diagram of a communication device provided by an embodiment of this application.
  • the device is used to implement the steps performed by the corresponding network device in the foregoing method embodiment.
  • the device 400 includes an acquiring unit 410 and a sending unit 420.
  • it further includes a receiving unit 430 and a determining unit 440.
  • the obtaining unit 410 is configured to obtain first configuration information of the MBMS of the first cell before the first cell covers the terminal device, where the terminal device is the terminal device covered by the second cell, and the network device is connected to the second cell Corresponding; sending unit 420, configured to send the first configuration information to the terminal device, the first configuration information is used to cover the terminal device in the first cell, the terminal device from the first A cell receives MBMS data.
  • the receiving unit 430 is configured to receive a request for acquiring from the first terminal device in the second cell before the sending unit 420 sends the first configuration information to the terminal device covered by the second cell.
  • the determining unit 440 is configured to determine, according to the message, to send the first configuration information to some or all of the terminal equipment covered by the second cell, where the part of the terminal equipment includes The first terminal device.
  • the determining unit 440 is configured to determine that the first cell will cover the first configuration information in the second cell before the sending unit 420 sends the first configuration information to the terminal equipment covered by the second cell.
  • the second terminal device determines to send the first configuration information to part or all of the terminal devices covered by the second cell, where the part of the terminal devices includes the second terminal device.
  • the sending unit 420 is specifically configured to send the first configuration information to the terminal device covered by the second cell in a broadcast manner, a unicast manner, or a multicast manner.
  • the determining unit 440 is configured to start a timer; the sending unit 420 is also configured to It is determined that the first configuration information is updated, and the timer is determined not to expire, and the updated first configuration information is sent to the terminal device covered by the second cell.
  • the determining unit 440 is configured to determine that the first cell is a mobile cell before the acquiring unit 410 acquires the first configuration information of the multimedia broadcast multicast service MBMS of the first cell, and determine to acquire The first configuration information.
  • the sending unit 420 is further configured to send second configuration information of the MBMS service of the second cell to the terminal equipment covered by the second cell, where the second configuration information is used for the The terminal device receives MBMS service data from the second cell.
  • the first configuration information includes at least one of the following: the identifier of the MBMS service, the time domain resource of the data transmission of the MBMS service, the frequency domain resource of the data transmission of the MBMS service, and the data transmission of the MBMS service
  • the length of the used TTI, the subcarrier interval used for data transmission of the MBMS service, the length of the cyclic prefix CP used for the data transmission of the MBMS service, the power used for the data transmission of the MBMS service, and the power used for the data transmission of the MBMS service The key used for pilot and MBMS service data transmission.
  • each of the above-mentioned units may also be referred to as a module or a circuit, etc., and the above-mentioned various units may be provided independently, or may be fully or partially integrated.
  • the sending unit 420 and the receiving unit 430 described above may also be implemented by a transceiver unit, or the sending unit 420 and the receiving unit 430 may also be collectively referred to as a transceiver unit.
  • the acquisition unit 410 and the determination unit 440 described above may also be implemented by a processing unit, or the acquisition unit 410 and the determination unit 440 may also be collectively referred to as a processing unit.
  • the foregoing sending unit 420, receiving unit 430, or transceiving unit may also be referred to as a communication interface, and the foregoing processing unit may also be referred to as a processor.
  • the aforementioned communication device 400 may further include a storage unit for storing data or instructions (also referred to as codes or programs), and each of the aforementioned units may interact or couple with the storage unit to implement corresponding methods or Features.
  • the processing unit may read data or instructions in the storage unit, so that the communication device implements the method in the foregoing embodiment.
  • FIG. 5 is a schematic diagram of a communication device provided by an embodiment of this application.
  • the device is used for terminal equipment.
  • the device 500 includes a receiving unit 510.
  • the device further includes a sending unit 520.
  • the receiving unit 510 is configured to receive first configuration information of the MBMS of the first cell before the first cell covers the terminal equipment, the terminal equipment is located in the coverage area of the second cell; After the terminal device receives the MBMS data of the first cell according to the first configuration information.
  • the sending unit 520 is configured to send information indicating that the first cell will cover the terminal device before the receiving unit 510 receives the first configuration information of the MBMS of the first cell.
  • the receiving unit 510 is specifically configured to receive the first configuration information in a broadcast manner, a unicast manner, or a multicast manner.
  • the receiving unit 510 is further configured to receive second configuration information of the MBMS service of the second cell; and receive data of the MBMS service of the second cell according to the second configuration information.
  • each of the above-mentioned units may also be referred to as a module or a circuit, etc., and the above-mentioned various units may be provided independently, or may be fully or partially integrated.
  • the foregoing sending unit 520 and receiving unit 510 may also be implemented by a transceiver unit, or the sending unit 520 and the receiving unit 510 may also be collectively referred to as a transceiver unit.
  • the aforementioned sending unit 520 and receiving unit 510 or the transceiving unit may also be referred to as a communication interface.
  • the aforementioned communication device 500 may further include a storage unit for storing data or instructions (also called codes or programs), and each of the aforementioned units may interact or couple with the storage unit to implement corresponding methods or Features.
  • a storage unit for storing data or instructions (also called codes or programs), and each of the aforementioned units may interact or couple with the storage unit to implement corresponding methods or Features.
  • An embodiment of the present application also provides a communication device, which is used to implement the units (or means) of each step performed by the terminal device in any of the above methods or used to implement each of the steps performed by the network device in any of the above methods.
  • the communication device may include a processor and a memory.
  • the memory is used to store computer-executable instructions.
  • the processor executes the computer-executable instructions stored in the memory, so that the device executes the above-mentioned various aspects. method.
  • the device may be a network device or a chip used for a network device, or a terminal device or a chip used for a terminal device.
  • each unit in the device can be all implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; part of the units can also be implemented in the form of software called by the processing elements, and some of the units can be implemented in the form of hardware.
  • each unit can be a separate processing element, or it can be integrated in a certain chip of the device for implementation.
  • it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or implemented in a form of being called by software through a processing element.
  • the unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASICs), or, one or Multiple microprocessors (digital singnal processors, DSPs), or, one or more field programmable gate arrays (Field Programmable Gate Arrays, FPGAs), or a combination of at least two of these integrated circuits.
  • ASICs application specific integrated circuits
  • DSPs digital singnal processors
  • FPGAs Field Programmable Gate Arrays
  • the unit in the device can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the above receiving unit is an interface circuit of the device for receiving signals from other devices.
  • the receiving unit is an interface circuit used by the chip to receive signals from other chips or devices.
  • the above unit for sending is an interface circuit of the device for sending signals to other devices.
  • the sending unit is an interface circuit used by the chip to send signals to other chips or devices.
  • the terminal equipment includes: an antenna 610, a radio frequency device 620, and a signal processing part 630.
  • the antenna 610 is connected to the radio frequency device 620.
  • the radio frequency device 620 receives the information sent by the network device through the antenna 610, and sends the information sent by the network device to the signal processing part 630 for processing.
  • the signal processing part 630 processes the information of the terminal device and sends it to the radio frequency device 620
  • the radio frequency device 620 processes the information of the terminal device and sends it to the network device via the antenna 610.
  • the signal processing part 630 is used to realize the processing of each communication protocol layer of the data.
  • the signal processing part 630 may be a subsystem of the terminal device, and the terminal device may also include other subsystems, such as a central processing subsystem, which is used to process the terminal device operating system and application layer; another example is peripheral sub-systems.
  • the system is used to realize the connection with other equipment.
  • the signal processing part 630 may be a separately provided chip.
  • the above devices may be located in the signal processing part 630.
  • the signal processing part 630 may include one or more processing elements 631, for example, a main control CPU and other integrated circuits.
  • the signal processing part 630 may also include a storage element 632 and an interface circuit 633.
  • the storage element 632 is used to store data and programs.
  • the program used to execute the method performed by the terminal device in the above method may or may not be stored in the storage element 632, for example, stored in a memory other than the signal processing part 630 During use, the signal processing part 630 loads the program into the cache for use.
  • the interface circuit 633 is used to communicate with the device.
  • the above devices may be located in the signal processing part 630, and the signal processing part 630 may be implemented by a chip.
  • the chip includes at least one processing element and an interface circuit.
  • the unit that implements each step in the above method can be implemented in the form of a processing element scheduler.
  • the device includes a processing element and a storage element, and the processing element calls a program stored by the storage element to execute the above method embodiments.
  • the storage element may be a storage element whose processing element is on the same chip, that is, an on-chip storage element.
  • the program used to execute the method executed by the terminal device in the above method may be a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the method executed by the terminal device in the above method embodiment.
  • the unit of the terminal device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are provided on the signal processing part 630, where the processing elements may be integrated circuits, for example : One or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units that implement each step in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC), and the SOC chip is used to implement the above method.
  • SOC system-on-a-chip
  • the chip can integrate at least one processing element and a storage element, and the processing element can call the stored program of the storage element to implement the method executed by the above terminal device; or, the chip can integrate at least one integrated circuit to implement the above terminal The method executed by the device; or, it can be combined with the above implementations.
  • the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.
  • the above apparatus may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any method executed by the terminal device provided in the above method embodiment.
  • the processing element can execute part or all of the steps executed by the terminal device in the first way: calling the program stored in the storage element; or in the second way: combining instructions through the integrated logic circuit of the hardware in the processor element Part or all of the steps executed by the terminal device are executed in a manner; of course, part or all of the steps executed by the terminal device may also be executed in combination with the first manner and the second manner.
  • the processing element here is the same as the above description, and it may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more micro-processing DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element can be a memory or a collective term for multiple storage elements.
  • the network equipment includes: an antenna 710, a radio frequency device 720, and a baseband device 730.
  • the antenna 710 is connected to the radio frequency device 720.
  • the radio frequency device 720 receives the information sent by the terminal device through the antenna 710, and sends the information sent by the terminal device to the baseband device 730 for processing.
  • the baseband device 730 processes the information of the terminal device and sends it to the radio frequency device 720
  • the radio frequency device 720 processes the information of the terminal device and sends it to the terminal device via the antenna 710.
  • the baseband device 730 may include one or more processing elements 731, for example, a main control CPU and other integrated circuits.
  • the baseband device 730 may also include a storage element 732 and an interface 733.
  • the storage element 732 is used to store programs and data; the interface 733 is used to exchange information with the radio frequency device 720.
  • the interface is, for example, a common public radio interface. , CPRI).
  • the above apparatus for network equipment may be located in the baseband apparatus 730.
  • the above apparatus for network equipment may be a chip on the baseband apparatus 730.
  • the chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute the above network. For each step of any method executed by the device, the interface circuit is used to communicate with other devices.
  • the unit for the network device to implement each step in the above method can be implemented in the form of a processing element scheduler.
  • the device for the network device includes a processing element and a storage element, and the processing element calls the program stored by the storage element to Perform the method performed by the network device in the above method embodiment.
  • the storage element may be a storage element with the processing element on the same chip, that is, an on-chip storage element, or a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the unit of the network device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are arranged on the baseband device.
  • the processing elements here may be integrated circuits, such as one Or multiple ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units for the network equipment to implement each step in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the baseband device includes the SOC chip for implementing the above method.
  • At least one processing element and storage element can be integrated in the chip, and the processing element can call the stored program of the storage element to implement the method executed by the above network device; or, at least one integrated circuit can be integrated in the chip to implement the above network The method executed by the device; or, it can be combined with the above implementations.
  • the functions of some units are implemented in the form of processing elements calling programs, and the functions of some units are implemented in the form of integrated circuits.
  • the above apparatus for a network device may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any method performed by the network device provided in the above method embodiments.
  • the processing element can execute part or all of the steps executed by the network device in the first way: calling the program stored in the storage element; or in the second way: combining instructions through the integrated logic circuit of the hardware in the processor element Part or all of the steps performed by the network device are executed in the method; of course, part or all of the steps executed by the network device above can also be executed in combination with the first method and the second method.
  • the processing element here is the same as the above description, and it may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more micro-processing DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element can be a memory or a collective term for multiple storage elements.
  • An embodiment of the present application also provides a communication system, including the communication device shown in FIG. 4 and the communication device shown in FIG. 5.
  • FIG. 6 Another embodiment of the present application provides a communication system, including a terminal device as shown in FIG. 6 and a network device as shown in FIG. 7.
  • the computer may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • the various illustrative logic units and circuits described in the embodiments of this application can be implemented by general-purpose processors, digital signal processors, application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, Discrete gates or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions.
  • the general-purpose processor may be a microprocessor.
  • the general-purpose processor may also be any traditional processor, controller, microcontroller, or state machine.
  • the processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration. achieve.
  • the aforementioned functions described in this application can be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, these functions can be stored on a computer-readable medium, or transmitted on the computer-readable medium in the form of one or more instructions or codes.
  • Computer-readable media include computer storage media and communication media that facilitate the transfer of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special computer.
  • Such computer-readable media may include, but are not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other device that can be used to carry or store instructions or data structures and Other program code media that can be read by general-purpose or special computers, or general-purpose or special processors.
  • any connection can be appropriately defined as a computer-readable medium, for example, if the software is from a website, server, or other remote source through a coaxial cable, fiber optic computer, twisted pair, or digital subscriber line (DSL) Or transmitted by wireless means such as infrared, wireless and microwave are also included in the definition of computer-readable media.
  • DSL digital subscriber line
  • the said disks and discs include compressed disks, laser disks, optical discs, digital versatile discs (English: Digital Versatile Disc, abbreviated as: DVD), floppy disks and Blu-ray discs.
  • Disks usually copy data with magnetism.
  • Discs usually use lasers to copy data optically.
  • the combination of the above can also be contained in a computer readable medium.
  • the functions described in this application can be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium.
  • the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

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Abstract

本申请提供一种通信方法及装置。该方法包括：网络设备在第一小区覆盖终端设备之前，获取第一小区的MBMS的第一配置信息，该终端设备为第二小区覆盖的终端设备，该网络设备与第二小区对应；网络设备向终端设备发送第一配置信息，第一配置信息用于在第一小区覆盖终端设备后，终端设备从第一小区接收MBMS的数据。该方案，当第二小区覆盖终端设备，第一小区未覆盖终端设备时，网络设备提前获取第一小区的MBMS的配置信息并发送给终端设备，从而当第一小区覆盖该终端设备之后，无需从第一小区接收MBMS的配置信息，而直接根据预先接收的配置信息从第一小区接收MBMS的数据。该方案可以减少接收MBMS的数据的等待时间，减少了时延。

Description

通信方法及装置 技术领域
本申请涉及移动通信技术领域，尤其涉及通信方法及装置。
背景技术
在非地面通信系统(non-terrestrial network，NTN)系统中，网络设备部署于非地面位置。以NTN系统为卫星通信系统为例，则网络设备部署于卫星上。卫星在天上飞行，卫星的小区也会随之移动，因此，覆盖终端设备的小区也会随之发生改变。比如，在T1时刻，卫星1的小区1覆盖终端设备，随着卫星的移动，在T2时刻，小区1不再覆盖终端设备，但卫星2的小区2覆盖该终端设备。当然，如果两个小区之间有重叠区域，则可能在某个时刻，该两个小区同时覆盖该终端设备(即该重叠区域覆盖该终端设备)。
基于该场景，当终端设备从卫星的小区接收多媒体广播多播业务(multi media broadcast multicast service，MBMS)业务的数据时，现有技术的方法为：当小区1覆盖终端设备时，则终端设备首先从小区接收MBMS的配置信息，然后根据该配置信息从小区1接收MBMS的数据。
上述方法存在的缺陷是：接收MBMS的数据的时延较大。
发明内容
本申请提供通信方法及装置，用以减少接收MBMS的数据的时延。
第一方面，本申请提供一种通信方法，包括：网络设备在第一小区覆盖终端设备之前，获取第一小区的MBMS的第一配置信息，所述终端设备为第二小区覆盖的终端设备，所述网络设备与所述第二小区对应；所述网络设备向所述终端设备发送所述第一配置信息，所述第一配置信息用于在所述第一小区覆盖所述终端设备后，所述终端设备从所述第一小区接收MBMS的数据。
基于该实施例，当第二小区覆盖终端设备，第一小区未覆盖终端设备时，网络设备可以提前获取第一小区的MBMS的配置信息并发送给第二小区覆盖范围下的终端设备，从而当第一小区覆盖该终端设备之后，无需从第一小区接收MBMS的配置信息，而直接根据预先接收的MBMS的第一配置信息，开始从第一小区接收MBMS的数据。因而该方案可以减少接收MBMS的数据的等待时间，减少了时延。
在一些可能的实现方法中，所述网络设备向所述终端设备发送所述第一配置信息之前，所述网络设备从所述第二小区内的第一终端设备接收请求获取第一MBMS的配置信息的消息；所述网络设备根据所述消息，确定向所述第二小区覆盖的部分或全部终端设备发送所述第一配置信息，其中，所述部分终端设备包含所述第一终端设备。该方案基于终端设备的请求，确定向终端设备发送第一配置信息，有助于减少第一配置信息的冗余发送，从而可以提升通信质量。
在一些可能的实现方法中，所述网络设备向所述终端设备发送所述第一配置信息之前，所述网络设备确定所述第一小区将要覆盖所述第二小区内的第二终端设备，则确定向所述第二小区覆盖的部分或全部终端设备发送所述第一配置信息，可选的，所述部分或全部终 端设备包括所述第二终端设备。该方案由网络设备确定向终端设备发送第一配置信息，无需基于终端设备的请求确定向终端设备发送第一配置信息，有助于较少终端设备的信令开销。
在一些可能的实现方法中，所述网络设备向第二小区覆盖的终端设备发送所述第一配置信息，包括：所述网络设备通过广播方式或单播方式或组播方式，向所述第二小区覆盖的终端设备发送所述第一配置信息。
在一些可能的实现方法中，所述网络设备向第二小区覆盖的终端设备发送所述第一配置信息之后，所述网络设备启动定时器；所述网络设备确定所述第一配置信息发生更新、且确定所述定时器未超时，则向所述第二小区覆盖的终端设备发送更新的第一配置信息。基于该方案，可以实现第一配置信息的更新，即使得终端设备可以接收到更新的第一配置信息，有助于提升通信质量。
在一些可能的实现方法中，所述网络设备获取第一小区的多媒体广播多播业务MBMS的第一配置信息之前，确定所述第一小区为移动小区，则确定获取所述第一配置信息。基于该方案，网络设备在确定第一小区为移动小区时，确定获取第一配置信息，有助于较少网络设备的开销。
在一些可能的实现方法中，所述网络设备向所述第二小区覆盖的终端设备发送所述第二小区的MBMS业务的第二配置信息，所述第二配置信息用于所述终端设备从所述第二小区接收MBMS业务的数据。
在一些可能的实现方法中，所述第一配置信息包括以下至少一种:MBMS业务的标识、MBMS业务的数据传输的时域资源、MBMS业务的数据传输的频域资源、MBMS业务的数据传输所使用的TTI长度、MBMS业务的数据传输所使用的子载波间隔、MBMS业务的数据传输所使用的循环前缀CP的长度、MBMS业务的数据传输所使用的功率、MBMS业务的数据传输所使用的导频、MBMS业务的数据传输所使用的密钥。
第二方面，本申请提供一种通信方法，包括：在第一小区覆盖终端设备之前，接收所述第一小区的MBMS的第一配置信息，所述终端设备位于第二小区的覆盖范围；在所述第一小区覆盖所述终端设备后，根据所述第一配置信息接收所述第一小区的MBMS的数据。
基于该实施例，当第二小区覆盖终端设备，第一小区未覆盖终端设备时，网络设备可以提前获取第一小区的MBMS的配置信息并发送给第二小区覆盖范围下的终端设备，从而当第一小区覆盖该终端设备之后，无需从第一小区接收MBMS的配置信息，而直接根据预先接收的MBMS的第一配置信息，开始从第一小区接收MBMS的数据。因而该方案可以减少接收MBMS的数据的等待时间，减少了时延。
在一些可能的实现方法中，接收第一小区的MBMS的第一配置信息之前，发送用于指示所述第一小区将要覆盖所述终端设备的信息。该方案基于终端设备的请求，确定向终端设备发送第一配置信息，有助于减少第一配置信息的冗余发送，从而可以提升通信质量。
在一些可能的实现方法中，所述接收第一小区的MBMS的第一配置信息，包括：通过广播方式或单播方式或组播方式，接收所述第一配置信息。
在一些可能的实现方法中，接收所述第二小区的MBMS业务的第二配置信息；根据所述第二配置信息，接收所述第二小区的MBMS业务的数据。
第三方面，本申请提供一种通信装置，该装置可以是网络设备(如接入网设备或DU)， 还可以是用于网络设备的芯片。该装置具有实现上述第一方面或第一方面的各实施例的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第四方面，本申请提供一种通信装置，该装置可以是终端设备，还可以是用于终端设备的芯片。该装置具有实现上述第二方面或第二方面的各实施例的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第五方面，本申请提供一种通信装置，包括：处理器和存储器；该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述各方面所述的方法。该装置可以是网络设备(如接入网设备或DU)或用于网络设备的芯片，或终端设备或用于终端设备的芯片。
第六方面，本申请提供一种通信装置，包括：包括用于执行上述各方面的各个步骤的单元或手段(means)。该装置可以是网络设备(如接入网设备或DU)或终端设备。
第七方面，本申请提供一种通信装置，包括处理器和接口电路，所述处理器用于通过接口电路实现上述各方面所述的方法。该处理器包括一个或多个。该装置可以是网络设备(如接入网设备或DU)或用于网络设备的芯片，或终端设备或用于终端设备的芯片。
第八方面，本申请提供一种通信装置，包括处理器，与存储器耦合或者交互，用于调用所述存储器中存储的程序，以执行上述各方面所述的方法。该存储器可以位于该装置之内，也可以位于该装置之外。且该处理器包括一个或多个。该装置可以是网络设备(如接入网设备或DU)或用于网络设备的芯片，或终端设备或用于终端设备的芯片。
第九方面，本申请还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得处理器执行上述各方面所述的方法。
第十方面，本申请还提供一种包括指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第十一方面，本申请还提供一种芯片系统，包括：处理器，用于执行上述各方面所述的方法。
第十二方面，本申请还提供一种通信系统，包括用于执行上述第一方面或第一方面的各实施例的网络设备，和，用于执行上述第二方面或第二方面的各实施例的终端设备。
附图说明
图1为本申请所适用的一种网络架构示意图；
图2A为本申请所适用的一种应用场景示意图；
图2B为本申请所适用的又一种应用场景示意图；
图3为本申请提供的一种通信方法示意图；
图4为本申请提供的一种通信装置示意图；
图5为本申请提供的又一种通信装置示意图；
图6为本申请提供的一种终端设备示意图；
图7为本申请提供的一种网络设备示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。其中，在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
如图1所示，为本申请所适用的一种网络架构示意图，包括终端设备和网络设备。网络设备部署在高空移动平台，如卫星、热气球、移动无人机等。该终端设备通过无线接口与网络设备通信。
终端设备是一种具有无线收发功能的设备，终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端，以及还可以包括用户设备(user equipment，UE)等。
网络设备，是无线网络中的设备，例如将终端设备接入到无线网络的无线接入网(radio access network，RAN)设备。目前，一些RAN设备的举例为：gNB、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)，或无线保真(wireless fidelity，Wifi)接入点(access point，AP)、接入回传一体化(integrated access and backhaul，IAB)等。本申请实施例中的网络设备可以是上述任一RAN设备，也可以是分布单元(distributed unit，DU)。本申请中的RAN设备也称为接入网设备。
5G独立部署时，接入网设备的逻辑体系可以采用集中单元(centralized unit，CU)和DU分离模式。基于协议栈功能的配置，CU-DU逻辑体系可以分为2种，即CU-DU分离架构和CU-DU融合架构。针对CU-DU分离架构，NR协议栈的功能可以动态配置和分割，其中一些功能在CU中实现，剩余功能在DU中实现。为满足不同分割选项的需求，需要支持理想传输网络和非理想传输网络。CU与DU之间的接口应当遵循3GPP规范要求。针对CU-DU融合架构，CU和DU的逻辑功能整合在同一个接入网设备中，以实现协议栈的全部功能。
可选的，本申请中的网络设备是部署在NTN系统中的。NTN系统可以包括卫星通信系统、高空平台(high altitude platform station，HAPS)通信系统或者其它非地面的通信系统。需要说明的是，只要是网络设备可以预知哪些小区将要覆盖哪些终端设备，都可以使用本申请方案。
为便于理解本发明内容，本申请后续以网络设备部署在卫星上为例进行说明。
如图2A和2B所示，给出了本申请实施例所适用的两种应用场景。如图2A所示，为本申请所适用的一种应用场景示意图。在卫星上部署RAN设备，该RAN设备不区分CU和DU。如图2B所示，为本申请所适用的又一种应用场景示意图。RAN设备区分CU和DU，其中，DU部署在卫星上，CU部署在地面上。
为解决背景技术中提到的问题，如图3所示，本申请提供一种通信方法。在终端设备侧，该方法可以由终端设备、或用于终端设备的部件(例如芯片或者电路等)执行。在网络侧，该方法可以由网络设备(可以是RAN设备或DU)、或用于网络设备的部件(例如芯片或者电路等)执行。为便于说明，下面以终端设备和网络设备执行该方法为例进行说明。
该方法包括以下步骤：
步骤301，网络设备在第一小区覆盖终端设备之前，获取第一小区的MBMS的第一配置信息。
这里的终端设备指的是第二小区覆盖范围下的终端设备。
这里的第一小区可以是即将覆盖该终端设备的一个小区，即在第二小区之后的一个会覆盖到该终端设备的小区。作为示例，假设小区1至小区5会依次覆盖UE1，UE1当前处于小区1的覆盖范围下，则这里的第二小区指的是小区1，第一小区指的是小区2。
这里的第一小区还可以是在将来的某个时刻会覆盖到该终端设备的小区。作为示例，假设小区1至小区5会依次覆盖UE1，UE1当前处于小区1的覆盖范围下，则这里的第二小区指的是小区1，第一小区指的是小区2至小区5中的一个或多个小区。
这里的第一小区还可以是终端设备指定的一个或者多个小区。作为示例，假设小区1至小区5会依次覆盖UE1，UE1当前处于小区1的覆盖范围下，UE1向网络设备请求获取小区3的MBMS业务的配置信息，则这里的小区指的是小区3。
需要说明的是，这里的第二小区是该网络设备下的小区，即该第二小区与该网络设备对应，或者也可以说第二小区是该网络设备管理的小区或者第二小区属于该网络设备。这里的第一小区可以是该网络设备下的小区，也可以是其他网络设备下的小区。
步骤302，网络设备在第一小区覆盖终端设备之前，向所述终端设备发送第一配置信息，第一配置信息用于第一小区覆盖终端设备后，终端设备从第一小区接收MBMS的数据。
其中，网络设备可以通过单播，广播或者组播的方式向该终端设备发送第一配置信息。步骤303，在第一小区覆盖终端设备后，终端设备根据第一配置信息接收第一小区的MBMS的数据。
基于该实施例，当第二小区覆盖终端设备，第一小区未覆盖终端设备时，网络设备可以提前获取第一小区的MBMS的配置信息并发送给第二小区覆盖范围下的终端设备，从而当第一小区覆盖该终端设备之后，无需从第一小区接收MBMS的配置信息，而直接根据预先接收的MBMS的第一配置信息，开始从第一小区接收MBMS的数据。因而该方案可以减少接收MBMS的数据的等待时间，减少了时延。
下面对上述实施例的具体实现过程进行说明。
上述步骤301中，网络设备获取第一小区的MBMS的第一配置信息的方法包括但不限于：
方法1，当网络设备为RAN设备，且第一小区与第二小区均为该RAN设备下的小区，则RAN设备上可以存储有该第一小区的MBMS的第一配置信息，因而RAN设备可以从本地获取该第一配置信息。
方法2，当网络设备为RAN设备，且第二小区为该RAN设备下的小区，第一小区为其他RAN设备下的小区，则该RAN设备可以向该其他RAN设备请求获取第一小区的 MBMS的配置信息，或者还可以是基于订阅的方式，由其他RAN设备向该RAN设备发送第一小区的MBMS的配置信息。
上述方法1和方法2是针对图2A所示的场景。
方法3，当网络设备为DU，且第一小区与第二小区均为该DU下的小区，则该DU上可以存储有该第一小区的MBMS的第一配置信息，因而DU可以从本地获取该第一配置信息；或者是，CU上存储有该第一小区的MBMS的第一配置信息，因而DU可以从CU获取该第一配置信息。
方法4，当网络设备为DU，且第二小区为该DU下的小区，第一小区为其他DU下的小区，则CU上可以存储有该第一小区的MBMS的第一配置信息，因而该DU可以从CU获取该第一配置信息。
上述方法3和方法4是针对图2B所示的场景。
作为一种实现方法，在上述步骤302之前，还可以包括：网络设备确定向第二小区覆盖的部分或全部终端设备发送第一小区的MBMS的第一配置信息。可以理解为，该步骤是一个触发的动作，即网络设备在确定需要向第二小区覆盖的终端设备发送第一小区的MBMS的第一配置信息时，可以执行以上步骤302。
下面介绍几种网络设备确定需要向第二小区覆盖的部分或全部终端设备发送第一小区的MBMS的第一配置信息的实现方法。
方法A，网络设备向第二小区覆盖的终端设备发送所述第一配置信息之前，第二小区内的第一终端设备向网络设备发送请求获取第一MBMS的配置信息的消息(比如该消息可以是请求消息)，则网络设备根据该消息确定向第二小区覆盖的部分或全部终端设备发送第一配置信息。
该方法中，当第二小区覆盖范围的某一个或者多个终端设备(比如第一终端设备)向网络设备请求获取某个特定的MBMS(比如第一MBMS)的配置信息时，则网络设备向该第二小区覆盖的一个或多个终端设备(比如所有的终端设备)发送第一小区的MBMS的第一配置信息。这里的第一小区的MBMS可以是该第一MBMS，也可以是第一小区内的所有的MBMS(包括正在传输的MBMS、将要传输的MBMS、刚刚完成传输的MBMS等)。
作为示例，假设第一小区内包含的MBMS有：MBMS1、MBMS2和MBMS3，第二小区覆盖的终端设备包括UE1、UE2和UE3。基于该方案，当UE1向网络设备请求获取MBMS1的配置信息时，则网络设备可以将第一小区的MBMS1的配置信息发送至UE1、UE2和UE3，也可以是将MBMS1、MBMS2和MBMS3的配置信息发送至UE1、UE2和UE3。或者，还可以将第一小区的MBMS1的配置信息发送至UE1，或者还可以是将MBMS1、MBMS2和MBMS3的配置信息发送至UE1。此处不一一例举。
针对该方案，网络设备可以通过广播方式或单播方式或者组播方式，向第二小区覆盖的部分或全部终端设备发送第一配置信息。
基于上述方法，基于终端设备的请求，确定向终端设备发送第一配置信息，有助于减少第一配置信息的冗余发送，从而可以提升通信质量。
方法B，网络设备向第二小区覆盖的终端设备发送所述第一配置信息之前，确定第一 小区将要覆盖第二小区内的第二终端设备，则确定向第二小区覆盖的部分或全部终端设备发送第一配置信息。
该方法中，当网络设备确定第一小区将要覆盖第二小区内的某一个终端设备(比如第二终端设备)时，则网络设备向该第二小区覆盖的一个或多个终端设备(比如所有的终端设备)发送第一小区的MBMS的第一配置信息。这里的第一小区的MBMS可以是第一小区内的所有的MBMS(包括正在传输的MBMS、将要传输的MBMS、刚刚完成传输的MBMS等)。
作为示例，假设第一小区内包含的MBMS有：MBMS1、MBMS2和MBMS3，第二小区覆盖的终端设备包括UE1、UE2和UE3。基于该方案，当网络设备确定第一小区将要覆盖UE1时，则网络设备可以将第一小区的MBMS1、MBMS2和MBMS3的配置信息发送至UE1、UE2和UE3。或者可以是将MBMS1、MBMS2和MBMS3的配置信息发送给UE1，或者UE1和UE2。
针对该方案，网络设备可以通过广播方式或单播方式或者组播方式，向第二小区覆盖的部分或全部终端设备发送第一配置信息。
作为一种实现方法，网络设备确定第一小区将要覆盖第二小区内的第二终端设备的方法包括但不限于：
1、第二终端设备向网络设备发送用于指示第一小区将要覆盖该第二终端设备的信息。其中，一种可能的实现方式中，该终端设备可以通过通知消息或者其他消息向网络设备指示第一小区将要覆盖该第二终端设备。
2、网络设备根据卫星运行的轨迹，确定第一小区将要覆盖第二小区内的第二终端设备。
比如卫星运行的轨迹显示小区1至小区4依次会覆盖UE1，其中小区1为当前覆盖UE1的小区，称为第二小区，小区2为即将覆盖UE1的小区，称为第一小区。
基于上述方法，由网络设备确定向终端设备发送第一配置信息，无需基于终端设备的请求确定向终端设备发送第一配置信息，有助于较少终端设备的信令开销。
方法C，网络设备向第二小区覆盖的终端设备发送所述第一配置信息之前，确定第一小区将要覆盖第二小区内的第二终端设备、且确定第二终端设备对MBMS业务感兴趣，则确定向第二小区覆盖的部分或全部终端设备发送第一配置信息。
该方法中，当网络设备确定第一小区将要覆盖第二小区内的某一个终端设备(比如第二终端设备)、且确定第二终端设备对MBMS业务感兴趣时，则网络设备向该第二小区覆盖的一个或多个终端设备(比如所有的终端设备)发送第一小区的MBMS的第一配置信息。这里的第一小区的MBMS可以是第一小区内的所有的MBMS(包括正在传输的MBMS、将要传输的MBMS、刚刚完成传输的MBMS等)。
作为示例，假设第一小区内包含的MBMS有：MBMS1、MBMS2和MBMS3，第二小区覆盖的终端设备包括UE1、UE2和UE3。基于该方案，当网络设备确定第一小区将要覆盖UE1、且确定UE1对MBMS业务感兴趣时，则网络设备可以将第一小区的MBMS1、MBMS2和MBMS3的配置信息发送至UE1、UE2和UE3。或者还可以是将MBMS1、MBMS2和MBMS3的配置信息发送至UE1。
针对该方案，网络设备可以通过广播方式或单播方式或组播方式，向第二小区覆盖的 部分或全部终端设备发送第一配置信息。
作为一种实现方法，网络设备确定第一小区将要覆盖第二小区内的第二终端设备的方法包括但不限于：
1、第二终端设备向网络设备发送用于指示第一小区将要覆盖该第二终端设备、且第二终端设备对MBMS业务感兴趣的信息。其中，一种可能的实现方式中，该终端设备可以通过通知消息或者其他消息向网络设备指示第一小区将要覆盖该第二终端设备、且第二终端设备对MBMS业务感兴趣。
本申请实施例中描述的“第二终端设备对MBMS业务感兴趣”，比如可以是：第二终端设备的应用层指示：用户对某个MBMS业务感兴趣。“第二终端设备对MBMS业务感兴趣”，可以理解为：第二终端设备能够接收MBMS业务。
2、网络设备根据卫星运行的轨迹，确定第一小区将要覆盖第二小区内的第二终端设备，以及根据预配置信息或第二终端设备的通知确定第二终端设备对MBMS业务感兴趣。
比如卫星运行的轨迹显示小区1至小区4依次会覆盖UE1，其中小区1为当前覆盖UE1的小区，称为第二小区，小区2为即将覆盖UE1的小区，称为第一小区。
这里的预配置信息，比如可以是：网管预先在网络设备上配置各个终端设备所对应的感兴趣的MBMS业务。
上述方法A至方法C中，当网络设备为RAN设备时，是由RAN设备确定向第二小区覆盖的终端设备发送第一配置信息；当网络设备为DU时，是由DU确定向第二小区覆盖的终端设备发送第一配置信息。作为一种扩展方案，当网络设备为DU时，也可以是由CU确定向第二小区覆盖的终端设备发送第一配置信息，其中CU确定向第二小区覆盖的终端设备发送第一配置信息的方法与上述方法A至方法C类似，可以参考前述描述，不再赘述。CU确定向第二小区覆盖的终端设备发送第一配置信息之后，可以通知DU向第二小区覆盖的终端设备发送第一配置信息。
作为一种实现方法，上述任意实现方法中的广播方式，比如可以是网络设备发送广播多播控制信道(multicast control channel，MCCH)消息等。上述任意实现方法中的单播方式，比如可以是网络设备发送专用信令等。上述任意实现方法中的组播方式，比如可以是MCCH消息，该MCCH消息中可以新增组无线网络临时标识(Group-Radio Network Temporary Identifier，G-RNTI)，用于指示一个组，该组内的UE可以接收该MCCH消息。
基于上述任意实施例，作为一种实现方法，网络设备还可以获取第二小区的MBMS的第二配置信息，并向第二小区覆盖的终端设备发送所述第二配置信息，第二配置信息用于终端设备从第二小区接收MBMS的数据。终端设备根据第二配置信息，接收第二小区的MBMS的数据。
基于上述任意实施例，作为一种实现方法，在上述步骤302之后，网络设备还可以启动定时器；网络设备确定第一配置信息发生更新、且确定定时器未超时，则向第二小区覆盖的终端设备发送更新的第一配置信息。即，在定时器未超时的时间范围内，若发生第一配置信息的更新，则网络设备可以向终端设备发送更新的第一配置信息。可选的，若定时器超时，则网络设备可以不立即向终端设备发送更新的第一配置信息，而可以等到网络设备确定需要向终端设备发送第一小区的MBMS的配置信息，再基于前述图3所示的实施例的方法，向终端设备发送第一小区的MBMS的配置信息，或者是网络设备确定无需再 向终端设备发送第一小区的MBMS的配置信息，则不再向终端设备发送第一小区的MBMS的配置信息。基于该方案，可以实现第一配置信息的更新，即使得终端设备可以接收到更新的第一配置信息，有助于提升通信质量。
基于上述任意实施例，作为一种实现方法，还可以在终端设备上配置一个定时器，终端设备位于第二小区时，在接收到网络设备发送的第一小区的MBMS的第一配置信息后启动定时器，若在定时器超时后终端设备还未移动至第一小区，终端设备可以丢弃或删除该第一配置信息，以便于节约终端设备的开销。
基于上述任意实施例，作为一种实现方法，在步骤301之前，网络设备确定第一小区为移动小区。即将第一小区为移动小区作为触发网络设备获取第一小区的MBMS的第一配置信息的条件。这里的移动小区包括但不限于：卫星小区、无人机小区、热气球小区等。基于该方案，网络设备在确定第一小区为移动小区时，确定获取第一配置信息，有助于较少网络设备的开销。
基于上述任意实施例，作为一种实现方法，上述步骤303中，如果终端设备能根据其它信息，获知每一个小区覆盖自己所在地理位置的时间，就可以直接在对应的时间点，根据事先收到的MBMS配置信息，从对应的小区直接接收MBMS的数据。比如，UE1获知T1至T2的时间段内，第一小区将会覆盖该UE所在的地理位置，则UE可以在T1至T2这个时间段内，根据预先接收到的第一小区的MBMS的第一配置信息，从第一小区接收MBMS的数据。
基于上述任意实施例，作为一种实现方法，终端设备(以第一终端设备为例)通知第一小区的网络设备(可以称为第一网络设备)，希望接收MBMS的数据(以第一配置信息对应的第一MBMS的数据为例)的方式，从而后续该终端设备移动至第一小区后，该第一网络设备可以向终端设备发送第一MBMS的数据。其中，第一终端设备通知第一网络设备希望接收第一MBMS的数据的方式包括但不限于：
1)、第一终端设备进入第一小区的覆盖范围之前，在第二小区内通知第二网络设备(即上述向终端设备发送第一配置信息的网络设备)：第一终端设备即将进入第一小区的覆盖范围，希望接收第一MBMS的数据。然后该第二网络设备通知第一网络设备：第一终端设备即将进入第一小区的覆盖范围，希望接收第一MBMS的数据。
2)、第一终端设备进入第一小区的覆盖范围之后，向第一小区发起随机接入，并在第一小区内通知第一网络设备：：第一终端设备已经进入第一小区的覆盖范围，希望接收第一MBMS的数据。
基于上述任意实施例，作为一种实现方法，若确定第一小区将会在较长的一个时间段之后才会覆盖到该终端设备，则网络设备也可以暂时不向第二小区覆盖的终端设备发送第一配置信息，而是等到一个合适的时间(比如距离第一小区覆盖该终端设备小于或等于第一时长)才向第二小区覆盖的终端设备发送第一配置信息。
基于上述任意实施例，作为一种实现方法，上述第一配置信息或第二配置信息包括但不限于以下至少一种:
1)、MBMS的标识，比如会话标识(session ID)、G-RNTI、逻辑信道标识(Logical Channel ID，LCH ID)中的一个或多个。
2)、MBMS的数据传输的时域资源。
这里的时域资源比如可以是窗口出现的周期、窗口起始处的时间偏移值、窗口大小。 这三个参数可以用绝对时间，如全球定位系统(Global Positioning System，GPS)时间表示，也可以用5G系统内的时间单元表示，如时隙(slot)数量、符号数、系统帧号(System Frame Number，SFN)、子帧号等。
需要说明的是，各个MBMS的发送时间窗可以相同，或者交叠，也可以各不相同。如果两个或多个MBMS的发送时间窗相同或交叠，在交叠部分，两个或多个MBMS可能会共用G-RNTI，并用不同的LCH ID进行区分。如果两个MBMS的发送时间窗没有交叠，则该两个MBMS可以不共用G-RNTI，或者是共用G-RNTI并用不同的LCH ID进行区分。
3)、MBMS的数据传输的频域资源。
这里的频域资源例如可以是子频带信息。子频带信息可以是一个索引信息，表示小区内的哪一部分频带；子频带信息也可以是带宽部分(bandwidth part,BWP)标识，表示MBMS在某个BWP内传输；子频带信息也可以是一对频点信息“起始频点，结束频点”。
4)、MBMS的数据传输所使用的传输时间间隔(Transmission Time Interval，TTI)长度。
5)、MBMS的数据传输所使用的子载波间隔。
6)、MBMS的数据传输所使用的循环前缀(Cyclic Prefix，CP)的长度。
7)、MBMS的数据传输所使用的功率。
8)、MBMS的数据传输所使用的导频。
9)、MBMS的数据传输所使用的密钥。
比如，作为一个示例，第一配置信息包括：MBMS数据传输的子帧(即MBMS的数据传输的时域资源)，GRNTI，逻辑信道标识。则上述步骤303中，UE根据第一配置信息接收第一小区的MBMS的数据的方法可以是：UE在接收到第一配置信息后，在第一配置信息所指示的子帧范围内，用第一配置信息里的GRNTI盲检物理下行控制信道(Physical Downlink Control Channel，PDCCH)，再根据检到的下行控制信息(Downlink control information，DCI)，在逻辑信道标识指示的逻辑信道接收数据。
可以理解的是，上述各个方法实施例中，对应由终端设备实现的步骤或者操作，也可以由可以配置于终端设备的部件(例如芯片或者电路)实现，由网络设备实现的的步骤或者操作，也可以由可以配置于网络设备的部件(例如芯片或者电路)实现。
本申请实施例还提供用于实现以上任一种方法的装置，例如，提供一种装置包括用以实现以上任一种方法中终端设备所执行的各个步骤的单元(或手段)。再如，还提供另一种装置，包括用以实现以上任一种方法中网络设备所执行的各个步骤的单元(或手段)。
例如，参考图4，为本申请实施例提供的一种通信装置的示意图。该装置用于实现上述方法实施例中对应网络设备所执行的各个步骤，如图4所示，该装置400包括获取单元410、发送单元420。可选的，还包括接收单元430、确定单元440。获取单元410，用于在第一小区覆盖终端设备之前，获取第一小区的MBMS的第一配置信息，所述终端设备为第二小区覆盖的终端设备，所述网络设备与所述第二小区对应；发送单元420，用于向所述终端设备发送所述第一配置信息，所述第一配置信息用于在所述第一小区覆盖所述终端设备后，所述终端设备从所述第一小区接收MBMS的数据。
在一些可能的实现方法中，接收单元430，用于在发送单元420向第二小区覆盖的终端设备发送所述第一配置信息之前，从所述第二小区内的第一终端设备接收请求获取第一MBMS的配置信息的消息；确定单元440，用于根据所述消息，确定向所述第二小区覆盖 的部分或全部终端设备发送所述第一配置信息，其中，所述部分终端设备包含所述第一终端设备。
在一些可能的实现方法中，确定单元440，用于在发送单元420向第二小区覆盖的终端设备发送所述第一配置信息之前，确定所述第一小区将要覆盖所述第二小区内的第二终端设备，则确定向所述第二小区覆盖的部分或全部终端设备发送所述第一配置信息，其中，所述部分终端设备包含所述第二终端设备。
在一些可能的实现方法中，发送单元420，具体用于通过广播方式或单播方式或组播方式，向所述第二小区覆盖的终端设备发送所述第一配置信息。
在一些可能的实现方法中，在发送单元420向第二小区覆盖的终端设备发送所述第一配置信息之后，确定单元440，用于启动定时器；发送单元420，还用于在确定单元440确定所述第一配置信息发生更新、且确定所述定时器未超时，向所述第二小区覆盖的终端设备发送更新的第一配置信息。
在一些可能的实现方法中，确定单元440，用于在所述获取单元410获取第一小区的多媒体广播多播业务MBMS的第一配置信息之前，确定所述第一小区为移动小区，确定获取所述第一配置信息。
在一些可能的实现方法中，发送单元420，还用于向所述第二小区覆盖的终端设备发送所述第二小区的MBMS业务的第二配置信息，所述第二配置信息用于所述终端设备从所述第二小区接收MBMS业务的数据。
在一些可能的实现方法中，所述第一配置信息包括以下至少一种:MBMS业务的标识、MBMS业务的数据传输的时域资源、MBMS业务的数据传输的频域资源、MBMS业务的数据传输所使用的TTI长度、MBMS业务的数据传输所使用的子载波间隔、MBMS业务的数据传输所使用的循环前缀CP的长度、MBMS业务的数据传输所使用的功率、MBMS业务的数据传输所使用的导频、MBMS业务的数据传输所使用的密钥。
可以理解的是，上述各个单元也可以称为模块或者电路等，并且上述各个单元可以独立设置，也可以全部或者部分集成。
一些可能的实现方式中，上述发送单元420和接收单元430也可以通过收发单元实现，或者说发送单元420和接收单元430也可以统称为收发单元。上述获取单元410和确定单元440也可以通过处理单元实现，或者说获取单元410和确定单元440也可以统称为处理单元。
上述发送单元420、接收单元430或者收发单元也可称为通信接口，上述处理单元也可以称为处理器。
可选的，上述通信装置400还可以包括存储单元，该存储单元用于存储数据或者指令(也可以称为代码或者程序)，上述各个单元可以和存储单元交互或者耦合，以实现对应的方法或者功能。例如，处理单元可以读取存储单元中的数据或者指令，使得通信装置实现上述实施例中的方法。
例如，参考图5，为本申请实施例提供的一种通信装置的示意图。该装置用于终端设备，如图5所示，该装置500包括接收单元510。可选的，该装置还包括发送单元520。
接收单元510，用于在第一小区覆盖终端设备之前，接收所述第一小区的MBMS的第一配置信息，所述终端设备位于第二小区的覆盖范围；在所述第一小区覆盖所述终端设备后，根据所述第一配置信息接收所述第一小区的MBMS的数据。
在一些可能的实现方法中，发送单元520，用于在接收单元510接收第一小区的MBMS的第一配置信息之前，发送用于指示所述第一小区将要覆盖所述终端设备的信息。
在一些可能的实现方法中，接收单元510，具体用于通过广播方式或单播方式或组播方式，接收所述第一配置信息。
在一些可能的实现方法中，接收单元510，还用于接收所述第二小区的MBMS业务的第二配置信息；根据所述第二配置信息，接收所述第二小区的MBMS业务的数据。
可以理解的是，上述各个单元也可以称为模块或者电路等，并且上述各个单元可以独立设置，也可以全部或者部分集成。
一些可能的实现方式中，上述发送单元520和接收单元510也可以通过收发单元实现，或者说发送单元520和接收单元510也可以统称为收发单元。
上述发送单元520和接收单元510或者收发单元也可称为通信接口。
可选的，上述通信装置500还可以包括存储单元，该存储单元用于存储数据或者指令(也可以称为代码或者程序)，上述各个单元可以和存储单元交互或者耦合，以实现对应的方法或者功能。
本申请一实施例还提供一种通信装置，用以实现以上任一种方法中终端设备所执行的各个步骤的单元(或手段)或者用以实现以上任一种方法中网络设备所执行的各个步骤的单元(或手段)。该通信装置可以包括处理器和存储器，该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述各方面所述的方法。该装置可以是网络设备或用于网络设备的芯片，或终端设备或用于终端设备的芯片。
应理解以上装置中单元的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且装置中的单元可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分单元以软件通过处理元件调用的形式实现，部分单元以硬件的形式实现。例如，各个单元可以为单独设立的处理元件，也可以集成在装置的某一个芯片中实现，此外，也可以以程序的形式存储于存储器中，由装置的某一个处理元件调用并执行该单元的功能。此外这些单元全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件又可以成为处理器，可以是一种具有信号的处理能力的集成电路。在实现过程中，上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路实现或者以软件通过处理元件调用的形式实现。
在一个例子中，以上任一装置中的单元可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)，或这些集成电路形式中至少两种的组合。再如，当装置中的单元可以通过处理元件调度程序的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，CPU)或其它可以调用程序的处理器。再如，这些单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
以上用于接收的单元(例如接收单元)是一种该装置的接口电路，用于从其它装置接收信号。例如，当该装置以芯片的方式实现时，该接收单元是该芯片用于从其它芯片或装置接收信号的接口电路。以上用于发送的单元(例如发送单元)是一种该装置的接口电路， 用于向其它装置发送信号。例如，当该装置以芯片的方式实现时，该发送单元是该芯片用于向其它芯片或装置发送信号的接口电路。
参考图6，其为本申请实施例提供的一种终端设备的结构示意图。该终端设备用于实现以上实施例中终端设备的操作。如图6所示，该终端设备包括：天线610、射频装置620、信号处理部分630。天线610与射频装置620连接。在下行方向上，射频装置620通过天线610接收网络设备发送的信息，将网络设备发送的信息发送给信号处理部分630进行处理。在上行方向上，信号处理部分630对终端设备的信息进行处理，并发送给射频装置620，射频装置620对终端设备的信息进行处理后经过天线610发送给网络设备。
信号处理部分630用于实现对数据各通信协议层的处理。信号处理部分630可以为该终端设备的一个子系统，则该终端设备还可以包括其它子系统，例如中央处理子系统，用于实现对终端设备操作系统以及应用层的处理；再如，周边子系统用于实现与其它设备的连接。信号处理部分630可以为单独设置的芯片。可选的，以上的装置可以位于信号处理部分630。
信号处理部分630可以包括一个或多个处理元件631，例如，包括一个主控CPU和其它集成电路。此外，该信号处理部分630还可以包括存储元件632和接口电路633。存储元件632用于存储数据和程序，用于执行以上方法中终端设备所执行的方法的程序可能存储，也可能不存储于该存储元件632中，例如，存储于信号处理部分630之外的存储器中，使用时信号处理部分630加载该程序到缓存中进行使用。接口电路633用于与装置通信。以上装置可以位于信号处理部分630，该信号处理部分630可以通过芯片实现，该芯片包括至少一个处理元件和接口电路，其中处理元件用于执行以上终端设备执行的任一种方法的各个步骤，接口电路用于与其它装置通信。在一种实现中，实现以上方法中各个步骤的单元可以通过处理元件调度程序的形式实现，例如该装置包括处理元件和存储元件，处理元件调用存储元件存储的程序，以执行以上方法实施例中终端设备执行的方法。存储元件可以为处理元件处于同一芯片上的存储元件，即片内存储元件。
在另一种实现中，用于执行以上方法中终端设备所执行的方法的程序可以在与处理元件处于不同芯片上的存储元件，即片外存储元件。此时，处理元件从片外存储元件调用或加载程序于片内存储元件上，以调用并执行以上方法实施例中终端设备执行的方法。
在又一种实现中，终端设备实现以上方法中各个步骤的单元可以是被配置成一个或多个处理元件，这些处理元件设置于信号处理部分630上，这里的处理元件可以为集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA，或者这些类集成电路的组合。这些集成电路可以集成在一起，构成芯片。
实现以上方法中各个步骤的单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现，该SOC芯片，用于实现以上方法。该芯片内可以集成至少一个处理元件和存储元件，由处理元件调用存储元件的存储的程序的形式实现以上终端设备执行的方法；或者，该芯片内可以集成至少一个集成电路，用于实现以上终端设备执行的方法；或者，可以结合以上实现方式，部分单元的功能通过处理元件调用程序的形式实现，部分单元的功能通过集成电路的形式实现。
可见，以上装置可以包括至少一个处理元件和接口电路，其中至少一个处理元件用于执行以上方法实施例所提供的任一种终端设备执行的方法。处理元件可以以第一种方式： 即调用存储元件存储的程序的方式执行终端设备执行的部分或全部步骤；也可以以第二种方式：即通过处理器元件中的硬件的集成逻辑电路结合指令的方式执行终端设备执行的部分或全部步骤；当然，也可以结合第一种方式和第二种方式执行终端设备执行的部分或全部步骤。
这里的处理元件同以上描述，可以是通用处理器，例如CPU，还可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个ASIC，或，一个或多个微处理器DSP，或，一个或者多个FPGA等，或这些集成电路形式中至少两种的组合。存储元件可以是一个存储器，也可以是多个存储元件的统称。
参考图7，为本申请实施例提供的一种网络设备的结构示意图。该网络设备用于实现以上实施例中网络设备的操作。如图7所示，该网络设备包括：天线710、射频装置720、基带装置730。天线710与射频装置720连接。在上行方向上，射频装置720通过天线710接收终端设备发送的信息，将终端设备发送的信息发送给基带装置730进行处理。在下行方向上，基带装置730对终端设备的信息进行处理，并发送给射频装置720，射频装置720对终端设备的信息进行处理后经过天线710发送给终端设备。
基带装置730可以包括一个或多个处理元件731，例如，包括一个主控CPU和其它集成电路。此外，该基带装置730还可以包括存储元件732和接口733，存储元件732用于存储程序和数据；接口733用于与射频装置720交互信息，该接口例如为通用公共无线接口(common public radio interface，CPRI)。以上用于网络设备的装置可以位于基带装置730，例如，以上用于网络设备的装置可以为基带装置730上的芯片，该芯片包括至少一个处理元件和接口电路，其中处理元件用于执行以上网络设备执行的任一种方法的各个步骤，接口电路用于与其它装置通信。在一种实现中，网络设备实现以上方法中各个步骤的单元可以通过处理元件调度程序的形式实现，例如用于网络设备的装置包括处理元件和存储元件，处理元件调用存储元件存储的程序，以执行以上方法实施例中网络设备执行的方法。存储元件可以为处理元件处于同一芯片上的存储元件，即片内存储元件，也可以为与处理元件处于不同芯片上的存储元件，即片外存储元件。
在另一种实现中，网络设备实现以上方法中各个步骤的单元可以是被配置成一个或多个处理元件，这些处理元件设置于基带装置上，这里的处理元件可以为集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA，或者这些类集成电路的组合。这些集成电路可以集成在一起，构成芯片。
网络设备实现以上方法中各个步骤的单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现，例如，基带装置包括该SOC芯片，用于实现以上方法。该芯片内可以集成至少一个处理元件和存储元件，由处理元件调用存储元件的存储的程序的形式实现以上网络设备执行的方法；或者，该芯片内可以集成至少一个集成电路，用于实现以上网络设备执行的方法；或者，可以结合以上实现方式，部分单元的功能通过处理元件调用程序的形式实现，部分单元的功能通过集成电路的形式实现。
可见，以上用于网络设备的装置可以包括至少一个处理元件和接口电路，其中至少一个处理元件用于执行以上方法实施例所提供的任一种网络设备执行的方法。处理元件可以以第一种方式：即调用存储元件存储的程序的方式执行网络设备执行的部分或全部步骤；也可以以第二种方式：即通过处理器元件中的硬件的集成逻辑电路结合指令的方式执行网 络设备执行的部分或全部步骤；当然，也可以结合第一种方式和第二种方式执行以上网络设备执行的部分或全部步骤。
这里的处理元件同以上描述，可以是通用处理器，例如CPU，还可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个ASIC，或，一个或多个微处理器DSP，或，一个或者多个FPGA等，或这些集成电路形式中至少两种的组合。存储元件可以是一个存储器，也可以是多个存储元件的统称。
本申请一实施例还提供一种通信系统，包括如图4所示的通信装置和如图5所示的通信装置。
本申请又一实施例提供一种通信系统，包括如图6所示的终端设备和如图7所示的网络设备。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包括一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
本申请实施例中所描述的各种说明性的逻辑单元和电路可以通过通用处理器，数字信号处理器，专用集成电路(ASIC)，现场可编程门阵列(FPGA)或其它可编程逻辑装置，离散门或晶体管逻辑，离散硬件部件，或上述任何组合的设计来实现或操作所描述的功能。通用处理器可以为微处理器，可选地，该通用处理器也可以为任何传统的处理器、控制器、微控制器或状态机。处理器也可以通过计算装置的组合来实现，例如数字信号处理器和微处理器，多个微处理器，一个或多个微处理器联合一个数字信号处理器核，或任何其它类似的配置来实现。
在一个或多个示例性的设计中，本申请所描述的上述功能可以在硬件、软件、固件或这三者的任意组合来实现。如果在软件中实现，这些功能可以存储与电脑可读的媒介上，或以一个或多个指令或代码形式传输于电脑可读的媒介上。电脑可读媒介包括电脑存储媒介和便于使得让电脑程序从一个地方转移到其它地方的通信媒介。存储媒介可以是任何通用或特殊电脑可以接入访问的可用媒体。例如，这样的电脑可读媒体可以包括但不限于RAM、ROM、EEPROM、CD-ROM或其它光盘存储、磁盘存储或其它磁性存储装置，或其它任何可以用于承载或存储以指令或数据结构和其它可被通用或特殊电脑、或通用或特殊处理器读取形式的程序代码的媒介。此外，任何连接都可以被适当地定义为电脑可读媒介，例如，如果软件是从一个网站站点、服务器或其它远程资源通过一个同轴电缆、光纤电脑、双绞线、数字用户线(DSL)或以例如红外、无线和微波等无线方式传输的也被包含在所定义的电脑可读媒介中。所述的碟片(disk)和磁盘(disc)包括压缩磁盘、镭射盘、 光盘、数字通用光盘(英文：Digital Versatile Disc，简称：DVD)、软盘和蓝光光盘，磁盘通常以磁性复制数据，而碟片通常以激光进行光学复制数据。上述的组合也可以包含在电脑可读媒介中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包括这些改动和变型在内。

Claims (14)

  1. 一种通信方法，其特征在于，包括：
    网络设备在第一小区覆盖终端设备之前，获取第一小区的多媒体广播多播业务MBMS的第一配置信息，所述终端设备为第二小区覆盖的终端设备，所述网络设备与所述第二小区对应；
    所述网络设备向所述终端设备发送所述第一配置信息，所述第一配置信息用于在所述第一小区覆盖所述终端设备后，所述终端设备从所述第一小区接收MBMS的数据。
  2. 如权利要求1所述的方法，其特征在于，所述网络设备向所述终端设备发送所述第一配置信息之前，还包括：
    所述网络设备从所述第二小区内的第一终端设备接收请求获取第一MBMS的配置信息的消息；
    所述网络设备根据所述消息，确定向所述第二小区覆盖的部分或全部终端设备发送所述第一配置信息，其中，所述部分终端设备包含所述第一终端设备。
  3. 如权利要求1所述的方法，其特征在于，所述网络设备向所述终端设备发送所述第一配置信息之前，还包括：
    所述网络设备确定所述第一小区将要覆盖所述第二小区内的第二终端设备，则确定向所述第二小区覆盖的部分或全部终端设备发送所述第一配置信息，所述部分或全部终端设备包括所述第二终端设备。
  4. 如权利要求1-3任一所述的方法，其特征在于，所述网络设备向所述终端设备发送所述第一配置信息之后，还包括：
    所述网络设备启动定时器；
    所述网络设备确定所述第一配置信息发生更新、且确定所述定时器未超时，则向所述第二小区覆盖的终端设备发送更新的第一配置信息。
  5. 如权利要求1-4任一所述的方法，其特征在于，所述网络设备获取第一小区的多媒体广播多播业务MBMS的第一配置信息之前，还包括：
    所述网络设备确定所述第一小区为移动小区，确定获取所述第一配置信息。
  6. 一种通信方法，其特征在于，包括：
    在第一小区覆盖终端设备之前，接收所述第一小区的多媒体广播多播业务MBMS的第一配置信息，所述终端设备位于第二小区的覆盖范围；
    在所述第一小区覆盖所述终端设备后，根据所述第一配置信息接收所述第一小区的MBMS的数据。
  7. 如权利要求6所述的方法，其特征在于，接收所述第一小区的MBMS的第一配置信息之前，还包括：
    发送用于指示所述第一小区将要覆盖所述终端设备的信息。
  8. 一种通信装置，其特征在于，用于实现如权利要求1-5任一所述的方法。
  9. 一种通信装置，其特征在于，用于实现如权利要求6或7所述的方法。
  10. 一种通信装置，其特征在于，包括：处理器，用于调用存储器中的程序，以使得所述通信装置执行权利要求1-5任一所述的方法。
  11. 一种通信装置，其特征在于，包括：处理器，用于调用存储器中的程序，以使得所述通信装置执行权利要求6或7所述的方法。
  12. 一种通信系统，其特征在于，包括终端设备和网络设备；
    所述网络设备，用于在第一小区覆盖所述终端设备之前，获取第一小区的多媒体广播多播业务MBMS的第一配置信息，所述终端设备为第二小区覆盖的终端设备，所述网络设备与所述第二小区对应；向所述终端设备发送所述第一配置信息；
    所述终端设备，用于在所述第一小区覆盖所述终端设备后，根据所述第一配置信息从所述第一小区接收MBMS的数据。
  13. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储程序，所述程序被处理器调用时，权利要求1-7任一所述的方法被执行。
  14. 一种计算机程序，其特征在于，当所述程序被处理器调用时，权利要求1-7任一所述的方法被执行。
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