WO2021103035A1 - 一种同步信号/广播信号块的广播方法及装置 - Google Patents

一种同步信号/广播信号块的广播方法及装置 Download PDF

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Publication number
WO2021103035A1
WO2021103035A1 PCT/CN2019/122286 CN2019122286W WO2021103035A1 WO 2021103035 A1 WO2021103035 A1 WO 2021103035A1 CN 2019122286 W CN2019122286 W CN 2019122286W WO 2021103035 A1 WO2021103035 A1 WO 2021103035A1
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WIPO (PCT)
Prior art keywords
network device
access network
message
terminal
broadcast
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PCT/CN2019/122286
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English (en)
French (fr)
Inventor
晋英豪
郝金平
谭巍
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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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980102016.4A priority Critical patent/CN114667767A/zh
Priority to PCT/CN2019/122286 priority patent/WO2021103035A1/zh
Priority to EP19954327.3A priority patent/EP4050942A4/en
Publication of WO2021103035A1 publication Critical patent/WO2021103035A1/zh
Priority to US17/826,973 priority patent/US20220303926A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H04W52/0258—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • This application relates to the field of communication technology, and in particular to a method and device for broadcasting a synchronization signal/broadcast signal block.
  • the present application provides a method and device for broadcasting a synchronization signal/broadcast signal block, in order to reduce the energy consumption of the system.
  • a method for broadcasting a synchronization signal/broadcast signal block SSB is provided.
  • the method can be implemented according to the following steps: the first access network device determines to request the second access network device to allocate resources for the terminal, the first access network device sends a first message to the second access network device, and the first access network device sends a first message to the second access network device.
  • the message is used to instruct the second access network device to broadcast a synchronization signal/broadcast signal block (synchronization signal/PBCH block, SSB) SSB.
  • SSB synchronization signal/PBCH block
  • the first access network device determines to request the second access network device to allocate resources for the terminal, and instructs the second access network device to broadcast the SSB through the first access network device, so that when the second access network device receives the instruction , To start broadcasting the SSB, to prevent the second access network equipment from broadcasting the SSB all the time, which can reduce the energy consumption of the second access network equipment, thereby reducing the energy consumption of the entire system.
  • the first message includes a broadcast period, and the broadcast period is a period during which the second access network device broadcasts the SSB.
  • the first access network device sends the broadcast period to the second access network device, and the second access network device can broadcast the SSB according to the broadcast period.
  • the first access network device sends a message including a broadcast period to the second access network device, where the broadcast period is a period in which the second access network device broadcasts the SSB.
  • the message may be other messages than the first message.
  • the first access network device sends a message including the broadcast period to the second access network device, and the second access network device can broadcast the SSB according to the broadcast period.
  • the first access network device sends a broadcast period to the terminal.
  • the broadcast period is a period during which the second access network device broadcasts the SSB.
  • the terminal obtains the broadcast period of the second access network device broadcasting the SSB, so that the terminal can receive the SSB of the second access network device according to the broadcast period. This can prevent the terminal from searching for the SSB according to other cycles, and selecting other network access because the SSB cannot be searched, which helps to ensure that the terminal normally accesses the second access network device.
  • the first access network device sends a second message to the second access network device, and the second message is used to instruct the second access network device to stop broadcasting the SSB.
  • the energy consumption of the second access network device can be further saved, thereby further reducing the system energy consumption.
  • the first access network device before the first access network device sends the second message to the second access network device, the first access network device receives the message from the second access network device
  • the third message is used to indicate the state of the terminal accessing the second access network device.
  • the state in which the terminal accesses the second access network device may be the state in which the terminal requested to allocate resources accesses the second access network device.
  • the first access network device can learn the status of the terminal accessing the second access network device, so that the first access network device can access the second access network device according to the terminal indicated by the third message
  • the energy consumption of the second access network device can be saved.
  • the status of the terminal accessing the second access network device may specifically include: (1) All terminals have been connected to the second access network device; (2) Some terminals have been connected to the second access network device equipment.
  • the third message may carry the identification of the terminal that is connected to the second access network device; and/or, the third message may carry the information of the terminal that is not connected to the second access network device.
  • the first access network device receives a message from the second access network device for instructing the second access network device to stop broadcasting the SBB.
  • the energy consumption of the second access network equipment can be saved.
  • the first access network device can determine according to the message that the second access network device has decided to stop broadcasting the SBB. And when the second access network device is required to allocate resources for the terminal subsequently, a message with the same/similar function as the first message is sent to the second access network device again.
  • the first access network device sends a fourth message to the terminal.
  • the fourth message may include a threshold, which is recorded as the first threshold; or the fourth message is used to indicate the reporting condition of the terminal, for example, the reporting condition It includes that the terminal triggers a report when the measured downlink signal strength of the first access network device is greater than or equal to the first threshold.
  • the first access network device sends a fourth message to the terminal to instruct the terminal to report, so that it can determine according to the report content of the terminal that it can request the second access network device to allocate resources for the terminal, so that the first access network device can instruct the second access
  • the connected device broadcasts SBB.
  • the second access network device can start broadcasting the SBB when receiving the instruction, compared to the second access network device always broadcasting the SBB
  • the solution can reduce the energy consumption of the second access network equipment.
  • the first access network device receives a fifth message from the terminal, and the fifth message may include the downlink signal strength of the first access network device measured by the terminal; or, the fifth message may It is used to indicate that the downlink signal strength of the first access network device measured by the terminal is greater than or equal to the first threshold.
  • the first access network device can determine whether the second access network device is suitable for allocating resources for the terminal through the fifth message reported by the terminal, so that the first access network device The determination instructs the second access network device to broadcast the SSB.
  • the second access network device can start broadcasting the SSB when receiving the instruction, compared to the second access network device always broadcasting the SSB
  • the solution can reduce the energy consumption of the second access network equipment.
  • the first access network device sends a sixth message to the terminal.
  • the sixth message may include a threshold, which is recorded as the second threshold; or the sixth message is used to indicate the reporting condition of the terminal, for example, the reporting condition It includes that the terminal triggers the report when the measured downlink signal strength of the second access network device is greater than or equal to the second threshold.
  • the first access network device instructs the terminal to report by sending a sixth message to the terminal, so that the terminal can trigger the report according to the downlink signal strength of the second access network device. This enables the first access network device to obtain more accurate information from the terminal to determine whether the second access network device can be requested to allocate resources for the terminal.
  • the first access network device may instruct the second access network device to broadcast the SSB. Further, through the first access network device instructing the second access network device to broadcast the SSB, the second access network device can start broadcasting the SSB when receiving the instruction, compared to the second access network device always broadcasting the SSB The solution can reduce the energy consumption of the second access network equipment.
  • the first access network device receives a seventh message from the terminal, and the seventh message may include the downlink signal strength of the second access network device measured by the terminal; or, the seventh message may It is used to indicate that the downlink signal strength of the second access network device measured by the terminal is greater than or equal to the second threshold.
  • the first access network device can use the seventh message reported by the terminal to more accurately determine whether the second access network device is suitable for allocating resources to the terminal. When the determination is yes, the first access network device may instruct the second access network device to broadcast the SSB.
  • the second access network device can start broadcasting the SSB when receiving the instruction, compared to the second access network device always broadcasting the SSB
  • the solution can reduce the energy consumption of the second access network equipment.
  • the first access network device receives an eighth message from a third access network device, where the eighth message is used to indicate that the auxiliary access network device of the terminal needs to receive information from the first access network device.
  • the third access network device is switched to the second access network device, or used to indicate that the second network device needs to be added as the auxiliary access network device of the terminal.
  • the third access network device is the auxiliary access network device.
  • the first access network device receives a message indicating the handover from the third access network device to determine to instruct the second access network device to start broadcasting the SSB The timing.
  • the second access network device can start broadcasting the SSB when receiving the instruction, compared to the second access network device always broadcasting the SSB
  • the solution can reduce the energy consumption of the second access network equipment.
  • the second access network device is a gNB.
  • the first message may instruct the second access network device to broadcast the SBB at the cell granularity.
  • the first message carries one or more cell identities, which are used to instruct the one or more cells of the second access network device to broadcast the SBB.
  • the second message may indicate the cell granularity to stop the second access network device from broadcasting the SBB.
  • the first message carries one or more cell identities, which are used to instruct to stop broadcasting the SBB in the one or more cells of the second access network device.
  • an SBB broadcasting method which can be implemented by the following steps: a second access network device receives a first message from a first access network device; the second access network device is based on the The first news broadcast SBB. The second access network device starts broadcasting the SBB when it receives the first message, which prevents the second access network device from broadcasting the SBB all the time, which can reduce the energy consumption of the second access network device, thereby reducing the energy consumption of the entire system.
  • the first message includes a broadcast period
  • the broadcast period is a period during which the second access network device broadcasts the SSB.
  • the second access network device can broadcast the SSB according to the broadcast period.
  • the second access network device receives a message including a broadcast period sent from the first access network device, where the broadcast period is a period during which the second access network device broadcasts the SSB.
  • the second access network device receives the message including the broadcast period from the first access network device, and the second access network device can broadcast the SSB according to the broadcast period. If the broadcast period is greater than the default broadcast period, by increasing the period of the second access network device broadcasting SSB, energy consumption can be further saved; if the broadcast period is greater than the default broadcast period, the terminal can access the second Access network equipment.
  • the second access network device sends a message to the first access network device, the message includes a broadcast period, and the broadcast period is a period during which the second access network device broadcasts the SSB .
  • the first access network device can send the broadcast period to the terminal, so that the terminal obtains the broadcast period of the second access network device.
  • the second access network device stops broadcasting the SBB.
  • the second access network device receives a second message from the first access network device; the second access network device stops broadcasting the SBB according to the second message. By instructing to stop broadcasting SBB, the energy consumption of the second access network equipment can be further saved.
  • the second access network device before sending the second message to the second access network device, the second access network device sends a third message to the first access network device, and the third message Used to indicate the status of the terminal accessing the second access network device.
  • the state in which the terminal accesses the second access network device may be the state in which the terminal requested to allocate resources accesses the second access network device.
  • the first access network device can learn the status of the terminal accessing the second access network device, so that the first access network device can access the second access network device according to the terminal indicated by the third message
  • To determine whether to instruct the second access network device to stop broadcasting SBB further, by promptly instructing the second access network device to stop broadcasting SBB, the energy consumption of the second access network device can be further saved.
  • the status of the terminal accessing the second access network device may specifically include: (1) All terminals have been connected to the second access network device; (2) Some terminals have been connected to the second access network device equipment.
  • the third message may carry the identification of the terminal that is connected to the second access network device; and/or, the third message may carry the information of the terminal that is not connected to the second access network device.
  • the second access network device decides to stop broadcasting the SBB according to its own situation.
  • the own situation may refer to the state of the terminal accessing the second access network device.
  • the second access network device can stop broadcasting SBB in time, which can save the energy consumption of the second access network device broadcasting SBB.
  • the second access network device when the second access network device decides to stop broadcasting the SBB, the second access network device may also notify the first access network device that the second access network device decides to stop broadcasting the SBB.
  • the second access network device receives the uplink measurement configuration from the third access network device.
  • the uplink measurement configuration may include information about the resource of the uplink measurement signal, and the uplink measurement configuration may be used to notify The second access network device receives the uplink measurement signal of the terminal.
  • the second access network device sends an uplink measurement report to the third access network device, where the uplink measurement report includes the uplink reference signal strength received from the terminal is greater than or equal to the second threshold, or the uplink measurement received from the terminal The strength value of the signal.
  • the third access network device can determine the handover event according to the uplink measurement report, that is, decide to switch the secondary access network device of the terminal from the third access network device to the second access network device.
  • the third access network device may send a request message to the first access network device to request the first access network device to initiate handover, that is, to switch the auxiliary access network device of the terminal from the third access network device to the second access network device. Access network equipment, so that the terminal can obtain better services of auxiliary access network equipment.
  • the first message may instruct the second access network device to broadcast the SBB at the cell granularity.
  • the first message carries one or more cell identities, which are used to instruct the one or more cells of the second access network device to broadcast the SBB.
  • the second message may indicate the cell granularity to stop the second access network device from broadcasting the SBB.
  • the first message carries one or more cell identities, which are used to instruct to stop broadcasting the SBB in the one or more cells of the second access network device.
  • a method for handover of a secondary access network device is provided.
  • the executor of the method is a third access network device.
  • the method can be implemented by the following steps:
  • the message may be an uplink measurement report, and the message may include information that the strength of the uplink measurement signal received by the second access network device from the terminal is greater than the second threshold;
  • the third access network device sends the message to the first
  • the access network device sends a request message, where the request message is used to indicate that the auxiliary access network device of the terminal needs to switch from the third access network device to the second access network device.
  • the first access network device can determine that the second access network device needs to allocate resources for the terminal when receiving the request message, that is, it can further determine the timing for instructing the second access network device to broadcast the SBB. Avoiding the second access network device from broadcasting the SBB all the time can reduce the energy consumption of the second access network device, thereby reducing the energy consumption of the entire system.
  • the third access network device sends an uplink measurement configuration to the second access network device
  • the uplink measurement configuration may include information about resources of the uplink measurement signal
  • the uplink measurement configuration may Used to notify the second access network device to receive the uplink measurement signal of the terminal.
  • the second access network device after the second access network device receives the uplink measurement configuration, it can receive the uplink measurement signal sent by the terminal on the resource indicated by the uplink measurement configuration, so as to determine whether the terminal has moved to its own service range.
  • the uplink measurement configuration includes the second threshold or event trigger information.
  • the second threshold or event trigger information may be used to instruct the second access network device to send an uplink measurement report to the third access network device after meeting certain conditions.
  • the uplink measurement configuration includes the identity of the terminal.
  • the third access network device sends the uplink measurement configuration to the terminal.
  • the third access network device sends the uplink measurement configuration to the terminal, and the terminal sends the uplink measurement signal on the resource indicated by the uplink measurement configuration. Only then will the second access network device detect the uplink sent by the terminal on the resource indicated by the uplink measurement configuration. Measure the signal.
  • an SBB broadcasting method may include the following steps: a terminal receives a message from a first access network device, which is recorded as a fourth message, and the fourth message may include a threshold, which is recorded as a first threshold; Or the fourth message is used to indicate the report condition of the terminal.
  • the report condition includes that the terminal triggers the report when the measured downlink signal strength of the first access network device is greater than or equal to the first threshold.
  • the terminal sends a fifth message to the first access network device, and the fifth message may include the downlink signal strength of the first access network device measured by the terminal; or, the fifth message may be used to indicate the first measured signal strength of the terminal.
  • the downlink signal strength of the access network device is greater than or equal to the first threshold.
  • the fifth message can be reported to the first access network device when the reporting conditions are met, so that the first access network device can determine that the second access network is suitable for the fifth message reported by the terminal.
  • the first access network device may instruct the second access network device to broadcast the SBB, so that the second access network device broadcasts the SSB according to the instruction of the first access network device, and achieves the purpose of energy saving when the SBB is not broadcast.
  • the downlink signal strength may be the downlink signal power or the signal-to-noise ratio.
  • the fourth message may be a broadcast message, and the fifth message may be an RRC message.
  • the fourth message includes measurement configuration information, and the fifth message may be a measurement report.
  • the fifth information is sent to the first access network device.
  • the terminal receives a broadcast period from the first access network device, and the broadcast period is a period in which the second access network device sends an SBB to the terminal.
  • the broadcast period is sent to the terminal through the first access network device, so that the terminal obtains the broadcast period of the second access network device.
  • the SBB is received according to the broadcast cycle of the second access network device. Avoiding that when the terminal searches for the SBB in a short period, selects other network access because it cannot search for the SBB, which helps to ensure that the terminal is normally connected to the second access network device.
  • an SBB broadcasting method is provided.
  • the method can be implemented by the following steps: a terminal receives a message from a first access network device that includes a broadcast period, and the broadcast period is that the second access network device broadcasts the SBB The period; the terminal receives the SBB from the second access network device according to the broadcast period.
  • the terminal receives the period of the SBB broadcast by the second access network device from the first access network device, so that the terminal can detect the SBB broadcast by the second access network device according to this period, so as to prevent the terminal from searching for SBB in other periods. If the SBB cannot be searched and other network access is selected, it helps to ensure that the terminal is normally connected to the second access network equipment.
  • the broadcast period is a period in which one or more cells of the second access network device broadcast SBB; the terminal receives the SBB from the second access network device according to the broadcast period SBB of one or more cells.
  • an SBB broadcast method is provided.
  • the method can be implemented by the following steps: the first access network device determines to request the second access network device to allocate resources for the terminal, and the first access network device sends the second access network device to the second access network device.
  • the network device sends a first message.
  • the first message carries a second broadcast period for the second access network device to broadcast a common control signal.
  • the second broadcast period is smaller than the first broadcast period, and the first broadcast period is the first broadcast period. The period during which the second access network device broadcasts the common control signal before the access network device sends the first message to the second access network device.
  • a method for broadcasting SBB is provided.
  • the method can be implemented by the following steps: the second access network device broadcasts the SBB in the first broadcasting period.
  • the first access network device sends a first message to the second access network device.
  • the first message carries the second broadcast period of the second access network device broadcasting the SBB, and the second access network device receives the first access network device.
  • the first message sent by the device; or, the second access network device determines the second broadcast period for broadcasting the SBB, and sends a second message to the first access network device, the second message carrying the second access network
  • the second broadcast period determined by the device.
  • the first access network device receives the second message sent by the second access network device.
  • the second broadcast period may be greater or smaller than the first broadcast period.
  • the second broadcast period is greater than the first broadcast period, by increasing the period for the second access network device to broadcast the SBB, energy consumption can be further saved.
  • the second broadcast period is less than the first broadcast period, when the first access network device determines that the second access network device allocates resources for the terminal, it can send the first message to the second access network device, and the first message can be passed through the first access network device.
  • the message instructs the second access network device to adjust the first broadcast period to the second broadcast period.
  • the second broadcast period is smaller than the first broadcast period. Therefore, the broadcast period of the second access network device is considered to be changed from a long period to a short period. In this way, the terminal can access the second access network device faster.
  • the second access network device broadcasts the SBB in a longer first broadcast period. Compared with closing the broadcast SBB, it does not need to start and stop the broadcast SBB frequently, thereby saving the signaling overhead caused by starting and stopping the broadcast SBB.
  • the first access network device sends a second message to the terminal, and the terminal receives the second message sent by the first access network device.
  • the message carries information about the second broadcast period of the SBB broadcast by the second access network device.
  • the second broadcast cycle of the second access network device broadcasting the SBB is sent to the terminal through the first access network device, so that the terminal can receive the SBB according to the broadcast cycle of the second access network device. Avoiding that when the terminal searches for the SBB in a period less than the broadcast period of the second access network device, the SBB selects other network access because it cannot search for the SBB, which helps the terminal to normally access the second access network device.
  • the first message carries one or more cell identities, which are used to indicate the second broadcast period of the one or more cells of the second access network device to broadcast the SBB.
  • the first message carries one or more cell identities, which are used to indicate the second broadcast period of the one or more cells of the second access network device to broadcast the SBB.
  • a communication device may be an access network device, such as a first access network device, or a device in the first access network device (for example, a chip, or a chip system, or Circuit), or a device that can be matched with the first access network device.
  • the communication device may include a module that performs a one-to-one correspondence of the method/operation/step/action performed by the first access network device described in the first aspect or the sixth aspect, and the module may be a hardware circuit, It can also be implemented by software, or a combination of hardware circuits and software.
  • the communication device may include a processing module and a communication module.
  • the processing module is used to call the communication module to perform the function of receiving and/or sending.
  • the processing module is configured to determine to request the second access network device to allocate resources for the terminal;
  • the communication module is configured to send a first message to the second access network device, and the first message is used to instruct the second access network device 2.
  • the access network equipment broadcasts SBB.
  • a communication device may be an access network device, such as a second access network device, or a device in the second access network device (for example, a chip, or a chip system, or Circuit), or a device that can be matched with the second access network device.
  • the communication device may include a module that performs a one-to-one correspondence of the method/operation/step/action performed by the second access network device described in the second aspect or the sixth aspect, and the module may be a hardware circuit, It can also be implemented by software, or a combination of hardware circuits and software.
  • the communication device may include a processing module and a communication module. The processing module is used to call the communication module to perform the function of receiving and/or sending. Exemplarily: the communication module is used to receive the first message from the first access network device; the processing module is used to call the communication module to broadcast the SBB according to the first message.
  • a communication device may be an access network device, such as a third access network device, or a device in the third access network device (for example, a chip, or a chip system, or Circuit), or a device that can be matched with the second access network device.
  • the communication device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the third aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the communication device may include a processing module and a communication module. The processing module is used to call the communication module to perform the function of receiving and/or sending.
  • a communication module configured to receive an uplink measurement report from a second access network device, the uplink measurement report including the power of the uplink measurement signal received from the terminal by the second access network device is greater than a set threshold Information; the communication module is also used to send a request message to the first access network device, the request message is used to indicate that the terminal needs to switch from the third access network device to the second access network equipment.
  • a communication device may be a terminal, a device in the terminal (for example, a chip, or a chip system, or a circuit), or a device that can be matched with the terminal.
  • the communication device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the fourth aspect or the fifth aspect.
  • the modules may be hardware circuits, software, or The hardware circuit is implemented in combination with software.
  • the communication device may include a processing module and a communication module. The processing module is used to call the communication module to perform the function of receiving and/or sending.
  • the communication module is configured to receive a broadcast message from a first access network device, the broadcast message includes trigger event information, and the trigger event information is used to indicate a reporting condition of the terminal.
  • the communication module is further configured to send a radio resource control RRC message to the first access network device, where the RRC message includes indication information, and the indication information is used to indicate that the terminal meets the reporting condition.
  • the communication module is configured to receive information about a broadcast period from a first access network device, where the broadcast period is a period in which the second access network device broadcasts the SBB; The SBB of the second access network device.
  • an embodiment of the present application provides a communication device.
  • the communication device is a first access network device.
  • the communication device includes a communication interface and a processor.
  • the communication interface is used for communication between the device and other devices. Communication, such as sending and receiving data or signals.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or another type of communication interface, and the other device may be a second access network device or terminal.
  • the processor is used to call a set of programs, instructions or data to execute the method described in the first aspect.
  • the device may also include a memory for storing programs, instructions or data called by the processor.
  • the memory is coupled with the processor, and when the processor executes instructions or data stored in the memory, the method described in the first aspect can be implemented.
  • an embodiment of the present application provides a communication device.
  • the communication device is a second access network device.
  • the communication device includes a communication interface and a processor.
  • the communication interface is used for communication between the device and other devices. Communication, such as sending and receiving data or signals.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or another type of communication interface, and the other device may be a first access network device, a third access network device, or a terminal.
  • the processor is used to call a set of programs, instructions or data to execute the method described in the second aspect.
  • the device may also include a memory for storing programs, instructions or data called by the processor. The memory is coupled with the processor, and when the processor executes instructions or data stored in the memory, the method described in the second aspect can be implemented.
  • an embodiment of the present application provides a communication device.
  • the communication device is a third access network device.
  • the communication device includes a communication interface and a processor.
  • the communication interface is used for communication between the device and other devices. Communication, such as sending and receiving data or signals.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or another type of communication interface, and the other device may be a first access network device, a second access network device, or a terminal.
  • the processor is used to call a set of programs, instructions or data to execute the method described in the third aspect.
  • the device may also include a memory for storing programs, instructions or data called by the processor. The memory is coupled with the processor, and when the processor executes instructions or data stored in the memory, the method described in the third aspect can be implemented.
  • an embodiment of the present application provides a communication device.
  • the communication device includes a communication interface and a processor.
  • the communication interface is used for communication between the device and other devices, for example, data or signal transmission and reception.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be the first access network device.
  • the processor is used to call a set of programs, instructions, or data to execute the method described in the fourth or fifth aspect.
  • the device may also include a memory for storing programs, instructions or data called by the processor.
  • the memory is coupled with the processor, and when the processor executes instructions or data stored in the memory, the method described in the fourth aspect can be implemented.
  • the embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores computer-readable instructions.
  • the computer can execute The method described in each aspect or any possible design in each aspect.
  • the embodiments of the present application provide a chip system, which includes a processor and may also include a memory, which is used to implement the above-mentioned first aspect or any one of the possible designs in the first aspect.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • an embodiment of the present application provides a chip system, which includes a processor and may also include a memory, which is used to implement the above-mentioned second aspect or any one of the possible designs of the second aspect.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • an embodiment of the present application provides a chip system, which includes a processor and may also include a memory, configured to implement the above-mentioned third aspect or any one of the possible designs of the third aspect. method.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • an embodiment of the present application provides a chip system, which includes a processor and may also include a memory, which is used to implement any one of the possible designs of the fourth aspect, the fifth aspect, and the fourth aspect. Or the method described in any of the possible designs of the fifth aspect.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • an embodiment of the present application provides a system that includes a first access network device and a second access network device, and the first access network device is configured to perform the first aspect or any of the foregoing.
  • the second access network device is used to execute the above-mentioned second aspect or any possible design method.
  • system further includes a third access network device, and the third access network device is configured to execute the above-mentioned third aspect or the method in any possible design.
  • the system further includes a terminal, and the terminal is configured to execute the method in any possible design of the fourth aspect, the fifth aspect, the fourth aspect, or the fifth aspect.
  • an embodiment of the present application provides a system, the system includes a first access network device and a second access network device, the first access network device is used to determine the request for the second access network The device allocates resources for the terminal; sends a first message to the second access network device, the first message is used to instruct the second access network device to start broadcasting the SBB; the second access network device is used to receive The first message from the first access network device broadcasts the SBB according to the first message.
  • FIG. 1 is a schematic diagram of the architecture of a communication system in an embodiment of the application
  • FIG. 2 is a schematic diagram of a system architecture based on non-standalone (NSA) in an embodiment of the present application;
  • NSA non-standalone
  • FIG. 3 is a schematic diagram of a system architecture based on standalone (SA) in an embodiment of the application;
  • FIG. 4 is one of the schematic flow diagrams of the broadcasting method of SBB in an embodiment of the application.
  • FIG. 5 is the second schematic diagram of the SBB broadcasting method in an embodiment of this application.
  • FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 8 is a schematic flowchart of yet another communication method provided by an embodiment of this application.
  • FIG. 9 is the third schematic flowchart of the SBB broadcasting method in an embodiment of this application.
  • FIG. 10 is the fourth flow diagram of the broadcasting method of SBB in an embodiment of this application.
  • FIG. 11 is the fifth schematic flowchart of the SBB broadcasting method in an embodiment of this application.
  • FIG. 12 is one of the schematic diagrams of the structure of the communication device in the embodiment of the application.
  • FIG. 13 is the second schematic diagram of the structure of the communication device in the embodiment of this application.
  • the SBB broadcasting method provided in the embodiments of the present application can be applied to a fifth-generation 5G communication system, such as a 5G new radio (NR) communication system, and can also be applied to various future communication systems.
  • a fifth-generation 5G communication system such as a 5G new radio (NR) communication system
  • the communication system includes a first access network device 101-1 and a second access network device 101-2.
  • the communication system may also include a terminal device 102 and a core network device 103.
  • the access network equipment or terminal equipment can be hardware, software that is functionally divided, or a combination of the two.
  • the first access network device 101-1 and the second access network device 101-2 may be connected through an interface (for example, an Xn interface or an X2 interface).
  • the first access network device 101-1 or the second access network device 101-2 may send downlink data to the terminal device 102, and may also receive uplink data sent by the terminal device 102.
  • the first access network device 101-1 and the second access network device 101-2 are nodes in a radio access network (RAN), which may also be called base stations, and may also be called RAN nodes (or RAN nodes). equipment).
  • access network equipment may include: next generation nodeB (gNB), next generation evolved nodeB (Ng-eNB), transmission reception point (TRP), evolved node B (evolved Node B, eNB), Radio Network Controller (RNC), Node B (Node 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 (BBU), or wireless fidelity (Wifi) access point (AP), or 5G
  • gNB next generation nodeB
  • Ng-eNB next generation evolved nodeB
  • TRP transmission reception point
  • eNB evolved node B
  • RNC Radio Network Controller
  • Node B Node B
  • BSC Base Station Controller
  • the device used to implement the function of the access network device may be the access network device; it may also be a device capable of supporting the access network device to implement the function, such as a chip system, and the device may be installed in the access network device.
  • the apparatus for implementing the functions of the access network equipment is an access network equipment as an example to describe the technical solutions provided by the embodiments of the present application.
  • the terminal device 102 which may also be referred to as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice or data connectivity to users , It can also be an IoT device.
  • the terminal device 102 includes a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • the terminal device 102 can be: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palmtop computer, a mobile internet device (MID), a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc.), In-vehicle equipment (for example, cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.), virtual reality (VR) equipment, augmented reality (AR) equipment, industrial control (industrial control) Wireless terminals, smart home equipment (for example, refrigerators, TVs, air conditioners, electric meters, etc.), smart robots, workshop equipment, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart The wireless terminal in the smart grid, the wireless terminal in the transportation safety, the wireless terminal in the smart city, or the wireless terminal in the smart home, and the flying equipment (for example, smart Robots, hot air balloons, drones, airplanes), etc.
  • MID mobile internet device
  • a wearable device such as a smart watch
  • the device used to implement the function of the terminal device may be a terminal device; it may also be a device capable of supporting the terminal device to implement the function, such as a chip system, and the device may be installed in the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device for implementing the functions of the terminal equipment is a terminal or UE as an example to describe the technical solutions provided in the embodiments of the present application.
  • the term “communication” can also be described as “data transmission”, “information transmission” or “transmission”.
  • This technical solution can be used for wireless communication between a scheduling entity and a subordinate entity.
  • Those skilled in the art can use the technical solution provided by the embodiments of this application to perform wireless communication between other scheduling entities and subordinate entities, such as macro base stations and micro base stations. Wireless communication between.
  • instructions can include direct instructions and indirect instructions, as well as explicit instructions and implicit instructions.
  • the information indicated by a certain piece of information is called information to be indicated.
  • the information to be indicated can be directly indicated, such as indicating the information to be indicated itself. Or the index of the information to be indicated, etc.
  • the information to be indicated can also be indicated indirectly by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, it is also possible to realize the indication of specific information by means of a pre-arranged order (for example, stipulated in an agreement) of various information, so as to reduce the indication overhead to a certain extent.
  • the indication function of a message when the indication function of a message is described, the indication function can be realized in multiple ways. For example, if message A is used to indicate B, it can be implemented in the following ways: Message A contains indication information indicating B. Or the message type of message A indicates B. Or message A contains information elements indicating B.
  • the SBB may include a synchronization signal/broadcast signal block (synchronization signal/PBCH block, SSB).
  • the SS/PBCH block can be called SSB.
  • the SSB may include at least one of the following: a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a physical broadcast channel (physical broadcast channel, PBCH).
  • first access network device 101-1 and the second access network device 101-2 are given below.
  • FIG. 2 is a schematic diagram of an NSA-based system architecture in an embodiment of the present application.
  • the first access network device is the (long term evolution, LTE) access network device (e.g., eNB) in the 4G communication system
  • the second access network device is the access network device in the 5G NR ( For example, gNB).
  • the eNB and the gNB can be connected through an interface (for example, an X2-C interface).
  • the control plane equipment of the core network is a mobility management entity (MME).
  • MME mobility management entity
  • the eNB and the MME may be connected through an interface (for example, an S1 interface).
  • the gNB is not connected to the core network control plane equipment.
  • the terminal accesses the network from the eNB and connects to the core network, and the terminal can receive the downlink control plane data from the core network from the eNB.
  • the terminal is connected to the gNB and can receive downlink data from the data plane of the gNB.
  • the core network equipment of the 4G user plane is a serving gateway (serving gateway, S-GW).
  • S-GW serving gateway
  • the eNB and gNB are connected to the S-GW, and can be connected through the S1-U interface. After the terminal accesses the network from the eNB, it can receive the downlink user plane data from the eNB and the gNB respectively.
  • Fig. 3 is a schematic diagram of an SA-based system architecture in an embodiment of the present application.
  • the first access network device and the second access network device are base stations (gNB) in 5G NR.
  • the first access network device is represented by gNB#1
  • the second access network device is represented by gNB. #2 said.
  • Two gNBs can provide dual-connectivity (DC) services for the terminal.
  • One gNB is used as a primary access network device or master node (master node, MN), and the other gNB is used as a secondary access network device or secondary node (secondary node, SN).
  • MN master node
  • secondary node secondary node
  • the MN and SN can be connected through an interface (for example, an Xn-C interface).
  • the control plane equipment of the core network is the access and mobility management function (AMF).
  • the MN and AMF can be connected through an interface (for example, an NG-C interface).
  • the SN has no control plane connection with the core network.
  • the terminal accesses the network from the MN and connects to the core network, and the terminal can receive downlink control plane data from the core network from the MN.
  • the core network equipment of the user plane of NR is a user plane function (UPF).
  • UPF user plane function
  • MN and SN are connected with UPF and can be connected through NG-U interface. After the terminal accesses the network from the MN, it can receive downlink user plane data from the MN and SN respectively.
  • Figures 2 and 3 show that the present application can be applied to an architecture where the control plane and the data plane are separated. However, it is worth noting that this application is not limited to the exemplified architecture where the control plane and the data plane are separated.
  • the specific process of the SBB broadcasting method provided by the embodiment of the present application is as follows.
  • S400 The first access network device determines to request the second access network device to allocate resources for the terminal.
  • S400 may also be: the first access network device determines to add the second access network device as a secondary node of the terminal.
  • the first access network device can be considered as the main access network device, and the main access network device can also be called the master node;
  • the second access network device can be considered as the auxiliary access network device, and the auxiliary access network device It can also be called a secondary node.
  • S400 may also be: the first access network device determines to switch the terminal to the second access network device. At this time, the first access network device can be considered as the source access network device, and the second access network device can be considered as the target access network device.
  • the first access network device sends a first message to the second access network device, and the second access network device receives the first message from the first access network device.
  • the first message is used to instruct the second access network device to broadcast the SBB.
  • the first message may include indication information, and the indication information is used to instruct the second access network device to broadcast the SBB.
  • the message type of the first message indicates that the second access network device broadcasts the SBB.
  • the first message may include an information element instructing the second access network device to broadcast the SBB.
  • the first message may instruct one or more cells under the second access network device to broadcast the SBB.
  • the first message carries the identity of one or more cells, which is used to instruct the one or more cells to broadcast the SBB.
  • the first access network device determines to request the second access network device to allocate resources for the terminal
  • the first access network device instructs the second access network device to broadcast the SBB, which can make the second access network device receive SBB is only broadcast when instructed.
  • the energy consumption of the second access network device can be reduced.
  • the second access network device may not need to broadcast the SBB periodically, so that the energy consumption of the second access network device can be reduced, thereby reducing the energy consumption of the entire system.
  • the first message may also be used to instruct the second access network device to broadcast SBB and system broadcast information blocks 1 (System information blocks 1, SIB1).
  • the terminal can obtain the SIB1 message of the second access network through the air interface of the second access network, so as to obtain the access parameters of the second access network without having to obtain the access parameters of the second access network.
  • RRC radio resource control
  • the first message sent by the first access network device to the second access network device may also carry a broadcast period, and the broadcast period is a period during which the second access network device broadcasts the SBB.
  • the broadcast period is a period during which the second access network device broadcasts the SBB.
  • the second access network device After receiving the first message from the first access network device, the second access network device starts broadcasting the SBB.
  • the broadcast period can also be carried in other messages except the first message. If the second access network device receives the broadcast period from the first access network device, the second access network device will broadcast the SBB according to the broadcast period indicated by the first access network device.
  • the second access network device may decide its own broadcast period of the SBB, and notify the first access network device of the broadcast period.
  • the first access network device may also further notify the terminal.
  • the second access network device can determine the next broadcast SBB cycle. Further, the first access network device notifies the terminal of the period of the second access network device broadcasting SBB, which enables the terminal to obtain the period of the second access network device broadcasting SBB, so that the terminal can more accurately monitor the second access period.
  • the SBB broadcast by the access network equipment, so that the terminal can correctly access the second access network equipment.
  • the access network equipment broadcasts the SBB may have a default cycle, the access network equipment will broadcast the SBB according to the default cycle, and the terminal will also detect the SBB according to the default cycle.
  • the first access network device notifies the second access network device of the period of broadcasting the SBB (may be referred to as the broadcast period for short), or the second access network device itself decides the broadcast period, which has at least the following beneficial effects . If the broadcast period is greater than the default period, by increasing the period for the second access network device to broadcast the SBB, energy consumption can be further saved.
  • the first access network device may also send the broadcast period to the terminal, so that the terminal obtains the broadcast period of the second access network device SBB.
  • the terminal receives the SBB according to the broadcast cycle of the second access network device. Avoiding that when the terminal searches for SBB in other cycles, it selects other network access because it cannot search for SBB, which helps to ensure that the terminal is normally connected to the second access network device.
  • the eNB is used as the primary access network device
  • the gNB is used as the secondary access network device.
  • the period of the gNB broadcasting SBB may be any one of 5ms, 10ms, 20ms, 40ms, 80ms, and 160ms.
  • the SSB broadcast period of 20ms can be used by default. In the case of a low load of the gNB, a broadcast period longer than 20 ms can be determined to broadcast the SSB by the method of the embodiment of the present application, thereby saving the energy consumption of the gNB.
  • the first message may be an SSB broadcast request (SSB broadcast request) message.
  • the second access network device After the second access network device starts broadcasting the SSB, there will be terminals successively receiving the SSB, and the terminal performs downlink synchronization based on the SSB, and accesses the second access network device. Or, the terminal performs downlink synchronization based on the SSB, and sends an uplink sounding reference signal (SRS), so that the second access network device can perform uplink measurement.
  • SRS uplink sounding reference signal
  • the second access network device After the second access network device broadcasts the SSB for a period of time, it can stop broadcasting the SSB, thereby saving energy consumption of the second access network device.
  • the trigger timing to stop broadcasting may be determined by the second access network device, or may be determined by the first access network device and notify the second access network device.
  • the second access network device stops broadcasting the SBB.
  • the implementation manner for the second access network device to stop broadcasting the SBB may be notified by the first access network device. For example, before S402, the following steps may also be included:
  • the first access network device sends a second message to the second access network device; the second access network device receives the second message from the first access network device.
  • the second message is used to instruct the second access network device to stop broadcasting the SBB.
  • the second message may include instruction information instructing the second access network device to stop broadcasting the SBB.
  • the message type of the second message instructs the second access network device to stop broadcasting the SBB.
  • the second message may include an information element instructing the second access network device to stop broadcasting the SBB.
  • the second message may indicate to stop broadcasting the SBB at the cell granularity.
  • the second message carries the identity of one or more cells, which is used to instruct the one or more cells to stop broadcasting the SBB.
  • the message name of the second information is not limited.
  • the second information may be a RAN configuration update (RAN configuration update) message.
  • the first access network device may decide to send the second message to the second access network device according to a certain strategy. For example, the first access network device may determine whether the second access network device is required to continue to provide resources for the terminal.
  • An implementation manner is as follows: through step S404 before step S403.
  • the second access network device sends a third message to the first access network device; the first access network device receives the third message from the second access network device.
  • the third message is used to indicate the state of the terminal accessing the second access network device.
  • the third message may include indication information used to indicate the state of the terminal accessing the second access network device.
  • the message type of the third message indicates the state of the terminal accessing the second access network device.
  • the third message may include an information element indicating the state of the terminal accessing the second access network device.
  • the state in which the terminal accesses the second access network device may be the state in which the terminal requested to allocate resources in S400 accesses the second access network device.
  • the status of the terminal accessing the second access network device may specifically include:
  • the third message may carry the identification of the terminal that is connected to the second access network device; or, the third message may carry the identification of the terminal that is not connected to the second access network device; or The third message carries the identification of each terminal requested to allocate resources, and the information of whether the terminal corresponding to each identification is connected to the second access network device.
  • the first access network device may determine the identity of the terminal that is not connected to the second access network device according to the identity of the terminal connected to the second access network device. terminal.
  • the first access network device may determine that it has been connected to the second access network based on the identity of the terminal that is not connected to the second access network device The terminal of the device.
  • the second access network device may obtain the identity of the terminal that is not connected to the second access network device in the following manner: the first access network device may request the second access network device to allocate resources for multiple terminals
  • the first access network device may send a message requesting the allocation of resources to multiple terminals to the second access network device, and the message includes the identities of the multiple terminals that are requested to allocate resources.
  • the second access network device can determine the identity of the terminal that has not accessed the second access network device based on the identities of the multiple terminals and the terminals that have accessed the second access network device.
  • the first access network device may use the information carried in the third message To determine the status of each terminal that is requested to allocate resources to access the second access network device.
  • the third message may carry the identification of the terminal, the identification of the cell and the indication information, and is used to indicate the state of the terminal requested to allocate resources to access the cell under the second access network device.
  • the third message may also indicate the terminal access status of each cell under the second access network device.
  • the terminal access condition of a cell includes: within the service range of the cell and all terminals requested to be assigned the cell as SN have successfully accessed the cell; or within the service range of the cell and requested to be assigned Part of the terminals whose cell is an SN successfully access the cell, or whether any terminal requested to allocate the cell as an SN needs to access the cell.
  • the first access network device may also send the second message to the second access network device at the cell granularity. That is, the second message is used to instruct one or more cells to stop broadcasting the SBB.
  • the message name of the third information is not limited.
  • the third message may be an access report message.
  • the first access network device may determine to send the second message to the second access network device according to the third message sent by the second access network device, and determine the content indicated by the second message .
  • Another possible implementation manner for the second access network device to stop broadcasting the SBB is that the second access network device decides to stop broadcasting the SBB according to its own situation. For example, before S402, the following steps may also be included:
  • the second access network device decides to stop broadcasting the SBB according to its own situation.
  • the first access network device determines to request the second access network device to allocate resources for terminal 1, terminal 2, and terminal 3.
  • the first access network device sends a first message to the second access network device, instructing the second access network device to broadcast the SBB.
  • terminal 1, terminal 2 and terminal 3 have successfully connected to the second access network device, for example, terminal 1, terminal 2 and terminal 3 have all completed initial access, and the second access network device decides to stop broadcasting SBB .
  • the second access network device decides to stop broadcasting the SBB.
  • the second access network device can start a timer.
  • the second access network device receives again a message instructing to start broadcasting the SBB, (for example, when the second access network device is required to allocate resources for other terminals, the first access network device will send another The news) SBB continues to broadcast SBB. If after the timer expires, the second access network device does not receive the message instructing to broadcast the SBB again, the second access network device stops broadcasting the SBB.
  • the second access network device may also notify the first access network device that the second access network device decides to stop broadcasting the SBB. For example, after S405, S406 may also be included.
  • the second access network device sends a message for instructing the second access network device to stop broadcasting the SBB to the first access network device, and the first access network device receives the message from the second access network device.
  • S402 and S406 have no restriction on the execution order, and they can be exchanged in order or performed simultaneously.
  • the first access network device can determine that the second access network device has decided to stop broadcasting the SBB. And when the second access network device is required to allocate resources for the terminal subsequently, a message with the same/similar function as the first message is sent to the second access network device again.
  • the second access network device may notify the first access network device to stop broadcasting the SBB at a cell granularity. For example, by carrying the identification of one or more cells in the notified message, the first access network device can be indicated to the first access network device: the second access network device decides to stop broadcasting the SBB for the cell indicated by the identification of the one or more cells .
  • the energy consumption caused by the second access network device's continuous broadcasting of the SBB can be reduced, thereby reducing the overall system overhead.
  • the energy consumption caused by the second access network device broadcasting SBB can be further reduced, thereby reducing the overall system overhead.
  • the first access network device is the main access network device.
  • the specific implementation process is as follows.
  • the first access network device determines to add the second access network device as a secondary node (SN) of the terminal.
  • the step of the S400 access network device determining that the second access network device allocates resources for the terminal can be described as the step described in S501.
  • the first access network device sends an SgNB/SN addition request (SgNB addition request) message to the second access network device.
  • the second access network device receives the SgNB/SN addition request message from the first access network device.
  • the SgNB/SN addition request message carries indication information, for example, the indication information is called first indication information, and the first indication information is used to instruct the second access network device to broadcast the SBB.
  • the SgNB/SN addition request message may also carry the broadcast period of the second access network device broadcasting the SBB, which is recorded as broadcast period 1.
  • the second access network device may start broadcasting the SBB when receiving the SgNB/SN increase request message.
  • the SgNB/SN addition request message does not include the first indication information, that is, the first access network device will not carry an indication of the second access network in the SgNB/SN addition request message.
  • the device broadcasts SBB instructions.
  • the SgNB/SN addition request message may include second indication information, which is used to indicate a condition for the second access network device to broadcast the SBB.
  • the condition may be that the second access network device is receiving The SBB will be broadcast when the SN reconfiguration complete message is reached.
  • the condition may also be to start broadcasting the SBB after receiving the SgNB/SN increase request after a set period of time has elapsed.
  • the second access network device will not broadcast the SBB immediately when receiving the SgNB/SN increase request, so this implementation mode can be applied to the terminal that does not need to monitor the SN immediately when the MN determines to add the SN to the terminal SBB.
  • this implementation may be suitable for scenarios where the terminal is pre-configured with SN.
  • SN pre-configuration refers to the RRC configuration process of the SN for the terminal, but the terminal does not need to access the SN, that is, the terminal does not need to perform the random access process with the SN.
  • the second access network device sends an SgNB/SN addition request confirmation message (SgNB addition request acknowledge) to the first access network device.
  • the first access network device receives the SgNB/SN addition request confirmation message from the second access network device.
  • the SgNB/SN addition request confirmation message may optionally carry the broadcast period of the second access network device broadcasting the SBB, which is recorded as broadcast period 2. If the second access network device receives broadcast period 1 in S502, broadcast period 2 may be the same as or different from broadcast period 1. That is, the second access network device may not broadcast the SBB according to the broadcast period 1 when receiving the broadcast period 1, but instead decides the broadcast period 2 of the SBB by itself, and informs the first access network device of the broadcast period 2.
  • the first access network device sends an RRC connection reconfiguration (RRC connection reconfiguration) message to the terminal.
  • the terminal receives the RRC reconfiguration message from the first access network device.
  • the RRC reconfiguration message includes a broadcast period in which the second access network device broadcasts the SBB.
  • the broadcast period included in the RRC reconfiguration message may be broadcast period 1; if the first access network device receives The broadcast period 2 notified by the second access network device, the broadcast period included in the RRC reconfiguration message may be broadcast period 2.
  • the second access network device can broadcast the SBB in a shorter period, for example, broadcast the SBB in a broadcast period of 5ms, which enables the terminal to access the second access network device faster.
  • the second access network device may broadcast the SBB in a longer period, for example, broadcast the SBB in a period of 160 ms, which can further save the energy consumption of the second access network device.
  • the second access network device notifies the first access network device of the broadcast period of SBB, and the first access network device notifies the terminal of the period of the second access network device's broadcast of SBB, and the terminal can learn about the second access network device The broadcast cycle of the broadcast SBB.
  • the terminal sends an RRC reconfiguration complete message (RRC connection reconfiguration complete) to the first access network device, and the first access network device receives the RRC reconfiguration complete message from the terminal.
  • RRC reconfiguration complete message RRC connection reconfiguration complete
  • S506 The first access network device sends an SN reconfiguration complete (SgNB reconfiguration complete) message to the second access network device.
  • the second access network device receives the SN reconfiguration complete message from the first access network device.
  • the SN reconfiguration complete message may include the first indication information , Used to instruct the second access network device to broadcast SBB. That is to say, in the embodiment shown in FIG. 4, the first message sent by the first access network device to the second access network device may be the SgNB/SN increase request message of S502, or the SN reconfiguration message of S506. Configuration complete message.
  • the first message is the SN reconfiguration completion message of S506, it can be applied to the SN pre-configuration scenario described in S502 above, which can further reduce the power consumption of SN broadcasting SBB, and also save dual-connection architecture or multiple connections. The power consumption of the entire system of the connection architecture.
  • the terminal accesses the second access network device through a random access procedure.
  • the second access network device can serve as an SN in a dual-connection architecture or a multi-connection architecture to provide services for the terminal .
  • the second access network device stops broadcasting the SBB.
  • the second access network device may stop broadcasting the SBB.
  • the second access network device can stop broadcasting the SBB in time, which can save the power consumption of the second access network device.
  • the second access network device sends a gNB configuration update (gNB configuration update) message to the first access network device.
  • gNB configuration update gNB configuration update
  • the message may carry indication information, which is recorded as third indication information.
  • the third indication information is used to indicate that the SN decides to stop or has stopped broadcasting the SBB.
  • FIG. 6 shows a communication method provided by an embodiment of the present application. As shown in FIG. 6, before the first access network device determines to request the second access network device to allocate resources for the terminal, the following steps may also be included.
  • the first access network device sends a fourth message to the terminal, and the terminal receives the fourth message from the first access network device.
  • the fourth message may include a threshold, which is recorded as the first threshold; or the fourth message is used to indicate the reporting condition of the terminal.
  • the reporting condition includes that the downlink signal strength of the first access network device measured by the terminal is greater than or equal to the first threshold. The report is triggered when the threshold is reached.
  • the fourth message may be a broadcast message.
  • the broadcast message includes trigger event information.
  • the trigger event information is used to indicate the first threshold, or the trigger event information is used to indicate the reporting condition of the terminal.
  • the reporting condition includes triggering when the terminal measures the downlink signal strength of the first access network device to be greater than or equal to the first threshold Reported.
  • the fourth message may also include measurement configuration information.
  • the fourth message may be an RRC message, for example, an RRC reconfiguration message.
  • the measurement configuration information may be used to indicate the first threshold; or the measurement configuration information may be used to indicate the reporting conditions of the terminal.
  • the reporting conditions may include triggering the reporting when the terminal measures the downlink signal strength of the first access network device to be greater than or equal to the first threshold .
  • the downlink signal strength may be the downlink signal power or the signal-to-noise ratio.
  • the terminal sends a fifth message to the first access network device, and the first access network device receives the fifth message from the terminal.
  • the fifth message may include the downlink signal strength of the first access network device measured by the terminal; or, the fifth message may be used to indicate that the downlink signal strength of the first access network device measured by the terminal is greater than or equal to the first threshold.
  • the terminal When the terminal receives the fourth message from the first access network device, it judges whether the measured downlink signal strength of the first access network device is greater than or equal to the first threshold included in the fourth message or the above reporting conditions. A threshold, if it is, it indicates that the report condition is met, and the terminal triggers the report of the fifth message.
  • the fifth message may be an RRC message; if the fourth message includes measurement configuration information, the fifth message may be a measurement report.
  • the fifth message may include the downlink signal strength of the first access network device measured by the terminal; when the fourth message includes the first threshold, the fifth message may also be used The downlink signal strength of the first access network device measured by the instructing terminal is greater than or equal to the first threshold.
  • the fifth message may include the downlink signal strength of the first access network device measured by the terminal; when the fourth message is used to indicate the report condition of the terminal, the fifth message may also be used to Instruct the terminal to measure the downlink signal strength of the first access network device to be greater than or equal to the first threshold.
  • S400 in the embodiment shown in FIG. 4 may be executed, that is, the first access network device determines to request the second access network device to allocate resources for the terminal.
  • the first access network device can determine whether the downlink signal strength of the first access network device measured by the terminal is greater than or equal to the first threshold according to the downlink signal strength of the first access network device measured by the terminal included in the fifth message, If yes, it is determined to request the second access network device to allocate resources for the terminal. Or, if the fifth message is used to indicate that the downlink signal strength of the first access network device measured by the terminal is greater than or equal to the first threshold, the first access network device determines according to the fifth message to request the second access network device to be the terminal resource allocation.
  • the first access network device may obtain the relationship between the downlink signal strength of the first access network device and the downlink signal strength of the second access network device (abbreviated as: signal relationship). For example, when the downlink signal strength (or signal strength range) received by the terminal from the first access network device is A, the downlink signal strength (or signal strength range) received by the terminal from the second access network device is B, A and B There is a certain relationship between them.
  • the first access network device may obtain the signal relationship from a core network device or an operation administration and maintenance (OAM) device. The first access network device may also obtain the signal relationship based on historical measurement information.
  • OFAM operation administration and maintenance
  • the first access network device When the first access network device receives the fifth message from the terminal, it can determine, according to the signal relationship, that the terminal should receive the downlink signal strength of the second access network device. Further, the first access network device determines that it can request the second access network device to allocate resources for the terminal according to the determined terminal that should receive the downlink signal strength of the second access network device.
  • the first access network device does not need to make further judgments based on the signal relationship, but has already considered the signal relationship when setting the first threshold. That is, once the first access network device receives the fifth message, it can be determined that the second access network device can be requested to allocate resources for the terminal.
  • Fig. 7 shows another communication method provided by an embodiment of the present application.
  • the third access network device serves as a secondary access network device to provide services for the terminal.
  • the first access network device serves as the main access network device to provide services for the terminal.
  • the embodiment shown in FIG. 7 describes an application scenario in which the auxiliary access network device of the terminal needs to be switched from the third access network device to the second access network device.
  • the first access network device in S400 determines to request the second access network device to allocate resources for the terminal. It can be understood that the first access network device determines to connect the terminal's secondary access network device from the third access network device. The network access device is switched to the second access network device.
  • the following steps may also be included.
  • the third access network device sends an uplink measurement configuration to the second access network device, and the second access network device receives the uplink measurement configuration from the third access network device.
  • the uplink measurement configuration may include resource information of the uplink measurement signal, and the uplink measurement configuration may be used to notify the second access network device to receive the uplink measurement signal of the terminal. After receiving the uplink measurement configuration, the second access network device can receive the uplink measurement signal sent by the terminal on the resource indicated by the uplink measurement configuration, so as to determine whether the terminal has moved to its own service range.
  • the uplink measurement configuration may also include second threshold or event trigger information. The second threshold or event trigger information may be used to instruct the second access network device to perform S704 after meeting certain conditions, that is, to send an uplink measurement report to the third access network device.
  • the uplink measurement report is sent to the third access network device.
  • the uplink measurement signal strength can be the uplink measurement signal power or signal-to-noise ratio.
  • the uplink measurement configuration may also include the identification of the terminal.
  • the uplink measurement signal may be SRS.
  • the uplink measurement configuration can be carried in an X2AP/XnAP message.
  • the X2AP message refers to an application layer message transmitted through the X2 interface
  • the XnAP message refers to an application layer message transmitted through the Xn interface.
  • the third access network device sends an uplink measurement configuration to the terminal, and the terminal receives the uplink measurement configuration.
  • the third access network device may first send the uplink measurement configuration to the first access network device, and the first access network device forwards the uplink measurement configuration to the terminal.
  • the uplink measurement configuration may include the information of the resource for sending the uplink measurement signal.
  • the terminal can determine the information of the resource for sending the uplink measurement signal.
  • the terminal may send the uplink measurement signal on the resource indicated by the uplink measurement configuration.
  • S701 and S702 do not have a strict execution order, and can be executed simultaneously or in exchange order.
  • S703 The terminal sends an uplink measurement signal.
  • the second access network device may receive the uplink measurement signal from the terminal, and the third access network device may also receive the uplink measurement signal from the terminal.
  • the second access network device sends an uplink measurement report to the third access network device, and the third access network device receives the uplink measurement report from the second access network device.
  • the second access network device sends an uplink measurement report to the third access network device when the condition indicated by the second threshold or event trigger information is met.
  • the uplink measurement report may include information that the strength of the uplink measurement signal received by the second access network device from the terminal is greater than the second threshold.
  • the uplink measurement report can be carried in the X2AP/XnAP message.
  • the uplink measurement report may include indication information for indicating that the strength of the uplink measurement signal received by the second access network device from the terminal is greater than or equal to the second threshold.
  • the uplink measurement report includes the strength value of the uplink measurement signal received by the second access network device from the terminal.
  • the uplink measurement report can be at the cell level and can be for one cell or multiple cells. If the uplink measurement report is at the cell level, the uplink measurement report may also carry the identity of the cell, which characterizes that the uplink measurement signal strength of the cell indicated by the identity of the cell is greater than the second threshold.
  • the third access network device makes a switching decision, and determines that the auxiliary access network device of the terminal needs to be switched from the third access network device to the second access network device.
  • the third access network device may make a handover decision based on the uplink measurement report sent by the second access network device. For example, the third access network device determines, according to the uplink measurement report, that the strength of the uplink measurement signal received from the terminal by the second access network device is higher than the second threshold, and then decides to perform handover.
  • the third access network device may also combine the uplink measurement report sent by the second access network device with the uplink measurement signal received from the terminal by itself. Switch decision. For example, the third access network device compares the uplink measurement signal received from the terminal by itself with the uplink measurement signal received from the terminal by the second access network device in the uplink measurement report received from the second access network device in S704 If the uplink measurement signal received by the second access network device from the terminal in the uplink measurement report is greater than or equal to the uplink measurement signal received by the third access network device from the terminal, the third access network device determines the handover event. Or, if the difference between the uplink measurement signal received by the second access network device from the terminal and the uplink measurement signal received from the terminal by the third access network device in the uplink measurement report is greater than the set threshold, the third access network device Decide on the switching event.
  • the third access network device sends a sixth message to the first access network device, and the first access network device receives the sixth message from the third access network device.
  • the sixth message is used to indicate that the auxiliary access network device of the terminal needs to switch from the third access network device to the second access network device.
  • the request message is an SN change request (SN change required) message.
  • the request message includes the identity of the second access network device. If it is a cell-granular handover instruction, it may include the identity of the cell of the second access network device.
  • the first access network device determines to switch the secondary access network device of the terminal from the third access network device to the second access network device.
  • FIG. 8 shows another communication method provided by an embodiment of the present application.
  • the third access network device serves as a secondary access network device to provide services for the terminal.
  • the first access network device serves as the main access network device to provide services for the terminal.
  • the embodiment shown in FIG. 8 describes an application scenario in which the auxiliary access network device of the terminal needs to be switched from the third access network device to the second access network device.
  • the first access network device in S400 determines to request the second access network device to allocate resources for the terminal. It can be understood that the first access network device determines to connect the terminal's secondary access network device from the third access network device. The network access device is switched to the second access network device.
  • the first access network device determines to request the second access network device to allocate resources for the terminal, which can be implemented in the following manner.
  • the first access network device sends the uplink measurement configuration to the second access network device and the second access network device respectively, and the second access network device and the third access network device respectively receive the data from the first access network device. Of the uplink measurement configuration.
  • the uplink measurement configuration may include resource information of the uplink measurement signal, and the uplink measurement configuration may be used to notify the second access network device and the third access network device to receive the uplink measurement signal of the terminal. After the second access network device and the third access network device receive the uplink measurement configuration, they can receive the uplink measurement signal sent by the terminal on the resource indicated by the uplink measurement configuration.
  • the uplink measurement configuration may also include second threshold or event trigger information. The second threshold or event trigger information may be used to instruct the second access network device or the third access network device to send an uplink measurement report to the first access network device after meeting certain conditions.
  • the uplink measurement report is sent to the third access network device.
  • the threshold in the uplink measurement configuration sent by the first access network device to the second access network device and the third access network device may be the same or different. If they are different, the second access network device and the third access network device respectively determine whether the report condition is satisfied according to the received threshold value, and send an uplink measurement report to the first access network device when the report condition is satisfied.
  • the first access network device sends an uplink measurement configuration to the terminal, and the terminal receives the uplink measurement configuration.
  • the uplink measurement configuration may include the information of the resource for sending the uplink measurement signal.
  • the terminal can determine the information of the resource for sending the uplink measurement signal according to the uplink measurement configuration.
  • the terminal may send the uplink measurement signal on the resource indicated by the uplink measurement configuration.
  • S801 and S802 do not have a strict execution order, and they can be executed at the same time or in exchange order.
  • S803 The terminal sends an uplink measurement signal.
  • the first access network device, the second access network device, and the third access network device may all receive the uplink measurement signal from the terminal.
  • the second access network device/third access network device sends an uplink measurement report to the first access network device, and the first access network device receives the uplink from the second access network device/third access network device. measurement report.
  • This step can refer to the description of S704.
  • the method for the third access network device to send the uplink measurement report to the first access network device can also refer to the method for the second access network device to send the uplink measurement report to the first access network device. I won't repeat them here.
  • the first access network device makes a switching decision, and determines that the auxiliary access network device of the terminal needs to be switched from the third access network device to the second access network device. That is, the first access network device determines to request the second access network device to allocate resources for the terminal.
  • the method for the first access network device to make a handover decision can refer to the method for the third access network device to make a handover decision in S705. That is, the handover decision can be made directly according to the received uplink measurement report, or the handover decision can be made based on the comparison between the uplink measurement signal received by itself and the uplink measurement signal in the uplink measurement report. For the specific method, refer to the description of S705 for details, which will not be repeated here.
  • FIG. 9 shows another SBB broadcasting method provided by an embodiment of the present application. As shown in Figure 9, the method includes the following steps.
  • the first access network device sends a broadcast message to the terminal, and the terminal receives the broadcast message from the first access network device.
  • the broadcast message includes trigger event information, the trigger event information is used to indicate the third threshold, or the trigger event information is used to indicate the report condition of the terminal, for example, the report condition includes the terminal measuring the downlink signal strength of the first access network device The report is triggered when it is greater than or equal to the third threshold.
  • the terminal sends a message, for example, an RRC message, to the first access network device, and the first access network device receives the RRC message from the terminal.
  • a message for example, an RRC message
  • the RRC message may include the downlink signal strength of the first access network device measured by the terminal, or the RRC message may be used to indicate that the downlink signal strength of the first access network device measured by the terminal is greater than or equal to the third threshold.
  • the third threshold may be the same as the first threshold above.
  • the first access network device sends a first message to the second access network device, and the second access network device receives the first message from the first access network device.
  • the first message instructs the second access network device to broadcast the SBB.
  • step S903 refer to step S401 for details.
  • the first access network device preliminarily determines that it can request the second access network device to allocate resources for the terminal based on the RRC message reported by the terminal, and the first access network device sends the first message to the second access network device , Instruct the second access network device to broadcast SBB.
  • the second access network device broadcasts the SBB according to the first message.
  • the first access network device sends measurement configuration information to the terminal, and the terminal receives the measurement configuration information from the first access network device.
  • the measurement configuration information is used to notify the terminal to measure the downlink signal of the second access network device, for example, the downlink signal may be SBB.
  • the measurement configuration information may include a fourth threshold; or the measurement configuration information is used to indicate a report condition of the terminal.
  • the report condition includes that the terminal triggers a report when the measured downlink signal strength of the second access network device is greater than or equal to the fourth threshold.
  • the terminal measures the downlink signal of the second access network device according to the measurement configuration information.
  • S906 The terminal sends a measurement report to the first access network device, and the first access network device receives the measurement report from the terminal.
  • the terminal triggers the report when the report condition is met according to the measured SBB broadcast by the second access network device.
  • the first access network device can more accurately determine whether the second access network device is suitable for allocating resources for the terminal according to the measurement report sent by the terminal. If yes, maintain the state of the second access network device broadcasting the SBB; otherwise, instruct the second access network device to stop broadcasting the SBB.
  • the first access network device can more accurately determine whether it is suitable to request the second access network device to allocate resources for the terminal. If appropriate, the second access network device maintains the broadcast SBB to facilitate terminal access. When it is not suitable, the first access network device notifies the second access network device to stop broadcasting the SBB, so as to save the energy consumption of the second access network device broadcasting the SBB.
  • FIG. 10 shows another SBB broadcasting method provided by an embodiment of the present application.
  • the method includes the following steps.
  • This embodiment can be applied to an application scenario of a dual-connection architecture or a multi-connection architecture.
  • the first access network device is the main access network device
  • the second access network device is the access network device that will serve the terminal.
  • the application scenario of application and handover can also be applied, where the first access network device is the source access network device, and the second access network device is the target access network device.
  • the first access network device sends an SRS request message to the second access network device, and the second access network device receives the SRS request message from the first access network device.
  • the SRS request message is used to request the second access network device to allocate SRS resources to one or more terminals.
  • the SRS request message may also include an identifier of the terminal, which is used to instruct to allocate SRS resources to the terminal corresponding to the identifier. If the SRS request message does not carry the identity of the terminal, the SRS request message is used to request that the SRS resource allocated by the second access network device can be shared by multiple terminals.
  • the second access network device can turn off the broadcast of the SBB. This can save the energy consumption of the second access network device.
  • the second access network device sends an SRS request reply message to the first access network device, and the first access network device receives the SRS request reply message from the second access network device.
  • the SRS request reply message includes the SRS resources allocated by the second access network device to one or more terminals.
  • S1001 and S1002 can be realized through the process of Xn/X2 interface establishment.
  • the SRS request message may be an Xn/X2 interface establishment request message
  • the SRS request reply message may be an Xn/X2 interface establishment request reply message.
  • the first access network device sends an RRC message to the terminal, and the terminal receives the RRC message sent by the first access network device.
  • the RRC message is an RRC reconfiguration message.
  • the RRC message includes the SRS resource allocated by the second access network device, and the SRS resource is used for the terminal to send the SRS.
  • the first access network device sends a first message to the second access network device.
  • the second access network device receives the first message from the first access network device.
  • the first message is used to instruct the second access network device to broadcast the SBB.
  • S401 for details.
  • the execution order of S1004 and S1003 is not limited, and can be carried out simultaneously or in exchange order.
  • the function of the SRS request message in S1001 may have the function of the first message, that is, the SRS request message may be used to instruct the second access network device to broadcast the SBB.
  • S1004 may be omitted.
  • the second access network device broadcasts the SBB.
  • the terminal receives the SBB broadcast by the second access network device.
  • the terminal performs downlink synchronization based on the public control information broadcast by the second access network device.
  • the terminal sends an uplink SRS to the second access network device, and the second access network device receives the uplink SRS from the terminal.
  • S1008 to S1010 may be executed, or S1011 may be executed after S1007, so as to realize the process of the second access network device to stop broadcasting the SBB.
  • S1008 ⁇ S1010 and S1011 can choose one to execute, that is, execute S1008 ⁇ S1010 without executing S1011; or, execute S1011 without executing S1008 ⁇ S1010.
  • the second access network device sends a message to the first access network device, and the first access network device receives the message from the second access network device.
  • the message can be an SRS notification message or a message with other names.
  • the message is used to notify the first access network device that the second access network device has received the uplink SRS sent by the terminal.
  • the message may include the identification of the terminal and/or the configuration of the SRS.
  • the first access network device can determine the uplink SRS of which terminals the second access network device has received through the terminal identifier, so that the first access network device can further determine whether to instruct the second access network device to stop broadcasting the downlink SBB.
  • This step can be used as a possible implementation of S404 in the embodiment of FIG. 4.
  • the first access network device sends a message to the second access network device; the second access network device receives the message from the first access network device. This message is used to instruct the second access network device to stop broadcasting the SBB.
  • This step can be used as a possible implementation of S403 in the embodiment of FIG. 4.
  • the second access network device sends a response message to the message in S1009 to the first access network device, and the first access network device receives the response message sent by the second access network device.
  • the response message is used to notify the first access network device that the second access network device has stopped broadcasting the downlink SBB.
  • This step is optional, or not executed.
  • the second access network device sends a message to the first access network device, where the message is used to instruct the second access network device to decide to stop broadcasting the downlink SBB.
  • the first access network device receives the message sent by the second access network device.
  • the second access network device After detecting the uplink SRS sent by the terminal, the second access network device decides to stop broadcasting the downlink SBB.
  • This step can be used as a possible implementation of S406 in the embodiment of FIG. 4.
  • a possible application scenario is: the first access network device and the second access network device may be two devices in a dual-connection or multi-connection architecture.
  • the device is the main access network device, and the second access network device is the auxiliary access network device.
  • the first access network device instructs the second access network device to start broadcasting the SBB, and the function of instructing to start broadcasting the SBB can be implemented through S1001 or S1004.
  • Another possible application scenario is: the first access network device is the source access network device, and the second access network device is the target access network device.
  • the second access network device can determine whether the terminal is within the service range of the second access network device according to the received uplink SRS of the terminal. If so, the second access network device determines that the terminal can be handed over from the first access network device to the second access network device.
  • the message sent by the second access network device to the first access network device in S1008 can be used to instruct the first access network device to perform handover, that is, to switch the terminal from the first access network device to the second access network device .
  • Fig. 11 shows another SBB broadcasting method provided by an embodiment of the present application. The method includes the following steps:
  • the first access network device sends a message to the second access network device.
  • the message carries the broadcast period of the second access network device broadcasting the SBB, and the second access network device receives the message sent by the first access network device. news.
  • the broadcast period for the second access network device to broadcast the SBB may also be determined by the second access network device itself.
  • the method may not include step S1101 but include step S1102.
  • step S1100 may be further included.
  • step S1100 reference may be made to the introduction of step S400, which will not be repeated.
  • the second access network device determines a broadcast period for broadcasting the SBB, and sends a message to the first access network device, where the message carries the broadcast period determined by the second access network device.
  • the first access network device receives the message sent by the second access network device.
  • the messages described in S1101 and S1102 can be explained as follows.
  • the message may indicate the broadcast period of the SBB broadcast by one or more cells under the second access network device.
  • the message carries the identity of one or more cells, which is used to indicate the broadcast period of the one or more cells to broadcast the SBB.
  • the message may be a RAN configuration update message.
  • S1101 and S1102 can choose one of the steps to execute. After S1101 or after S1102, S1103 may be executed.
  • the first access network device sends a message to the terminal, and the terminal receives the message sent by the first access network device.
  • the message carries information about the broadcast period of the SBB broadcast by the second access network device.
  • the terminal receives the SBB from the second access network device according to the broadcast period.
  • the first access network device sends an RRC reconfiguration message to the terminal, and the RRC reconfiguration message carries a broadcast period.
  • the terminal receives the RRC reconfiguration message from the first access network device, receives the SBB from the second access network device according to the broadcast period carried in the RRC reconfiguration message, and sends the RRC reconfiguration complete to the first access network device news.
  • the broadcast period information sent by the first access network device to the terminal may be sent by the second access network device to the first access network device, and the first access network device sends ( For example, transparent transmission) to the terminal device.
  • the first access network device can also inform the terminal of the SBB broadcast period of the second access network device in the broadcast message.
  • the first access network device is The SIB10 informs the terminal of the SBB broadcast cycle of the second access network device.
  • the broadcast period in each of the above steps may be cell granular.
  • a broadcast period is set for one or more cells under the second access network device, and the first access network device sends the broadcast period to the second access network device.
  • the cell identifier indicates the broadcast period corresponding to the cell.
  • the second access network device sends the broadcast period to the first access network device, the cell identifier is carried to indicate the broadcast period corresponding to the cell.
  • the SBB Before step S1101 or S1102, if the second access network device is not broadcasting the SBB, after S1101 or S1102, the SBB can be broadcast according to the broadcast period indicated by the message in step S1101 or S1102. If before step S1101 or S1102, the second access network device broadcasts the SBB in the first broadcast cycle, after step S1101 or S1102, it broadcasts the SBB according to the broadcast cycle indicated by the message in step S1101 or S1102. For the convenience of description, the broadcast period in S1101 or S1102 may be referred to as the second broadcast period.
  • the second broadcast period described in S1101 and S1102 is smaller than the first broadcast period.
  • the first broadcast period is 160 ms, and the longer 160 ms broadcast period is used to broadcast the SBB, which can save the energy consumption of the second access network device.
  • the first access network device may perform steps S1101 and S1103.
  • the broadcast period of the second access network device can be notified to be adjusted to the second broadcast period.
  • the second broadcast period may be a period less than 160 ms, for example, 20 ms.
  • the terminal can obtain the second broadcast period.
  • the second access network device shortens the broadcast period, which can enable the terminal to access the second access network device faster.
  • the first access network device can notify the second access network device to lengthen the broadcast period and notify the terminal accordingly. For example, the first broadcast period can be adjusted back to save the second access network device. Energy consumption of connected equipment.
  • the first access network device instructs the second access network device of the foregoing broadcast period or the second access network device indicates the foregoing broadcast period to the first access network device, and the first access network device sends the broadcast period to the terminal, This allows the terminal to obtain the broadcast period of the second access network device.
  • the SBB is received according to the broadcast cycle of the second access network device. By increasing the period during which the second access network device broadcasts the SBB, energy consumption can be further saved.
  • the speed at which the terminal accesses the second access network device can be accelerated.
  • the SBB selects other network access because it cannot search for the SBB, which helps the terminal to access the second access normally.
  • Network access equipment
  • the various messages described in the embodiments of this application can reuse the messages of the existing protocol, specifically the existing protocol
  • the name of the message can be the message name mentioned above for each message, or it can be other message names.
  • Each message may also be a newly defined message, and the name of the newly defined message is not limited.
  • the first message may be an SBB trigger request message
  • the second message may be an SBB broadcast stop message
  • the third message may be an access report (access reporting).
  • the method provided in the embodiments of the present application is performed from the perspective of the interaction between the first access network device, the second access network device, the third access network device, the terminal, and each device.
  • the first access network device, the second access network device, the third access network device, and the terminal device may include hardware structures and/or software modules.
  • the above-mentioned functions can be realized in the form of structure, software module, or hardware structure plus software module. Whether a certain function of the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • an embodiment of the present application also provides an apparatus 1200.
  • the apparatus 1200 may be a terminal device or an access network device.
  • the access network device includes a first access network device, a second access network device, or The third access network device. It may also be a device in a terminal device or an access network device, or a device that can be used in a matching manner with the terminal device or the access network device.
  • the apparatus 1200 may include modules that perform one-to-one correspondence of the methods/operations/steps/actions performed by the terminal device or the access network device in the foregoing method embodiments.
  • the module may be a hardware circuit or software. It can also be realized by hardware circuit combined with software.
  • the device may include a processing module 1201 and a communication module 1202. The processing module 1201 is used to call the communication module 1202 to perform receiving and/or sending functions.
  • the processing module 1201 is configured to determine to request the second access network device to allocate resources for the terminal;
  • the communication module 1202 is configured to send a first message to the second access network device, and the first message is used to instruct the second access network device to broadcast the SBB.
  • the processing module 1201 and the communication module 1202 may also be used to execute other steps performed by the above-mentioned first access network device, and details are not described herein again.
  • the processing module 1201 invokes the communication module 1202 to execute the transceiving operations performed by the first access network device in each of the above-mentioned embodiments of FIG. 4 to FIG. 11.
  • the processing module 1201 is also configured to perform operations of the first access network device in addition to the receiving and sending operations in each of the above-mentioned embodiments of FIG. 4 to FIG. 11.
  • the communication module 1202 is configured to receive a first message from a first access network device, where the first message is used to instruct the second access network device to broadcast the SBB;
  • the processing module 1201 is configured to call the communication module 1202 to broadcast the SBB according to the first message.
  • the processing module 1201 and the communication module 1202 are also used to perform other steps performed by the above-mentioned second access network device, which will not be repeated here.
  • the processing module 1201 calls the communication module 1202 to execute the receiving and sending operations performed by the second access network device in each of the above-mentioned embodiments of FIG. 4, FIG. 5, and FIG. 7-11, and the processing module 1201 is also used to execute the above-mentioned FIG. 4, FIG. 5.
  • the operations of the second access network device in the respective embodiments of FIGS. 7-11 except for the receiving and sending operations.
  • the communication module 1202 is configured to receive information about a broadcast period from the first access network device, where the broadcast period is the period in which the second access network device broadcasts the SBB; and Periodically receive the SBB from the second access network device.
  • the processing module 1201 and the communication module 1202 may also be used to perform other corresponding steps or operations performed by the terminal in the foregoing method embodiment, which will not be repeated here.
  • the processing module 1201 calls the communication module 1202 to execute the receiving and sending operations performed by the terminal in each of the above-mentioned embodiments of FIGS. 5-11.
  • the processing module 1201 is also configured to perform operations of the terminal in addition to the receiving and sending operations in each of the above-mentioned embodiments of FIG. 5 to FIG. 11.
  • the division of modules in the embodiments of this application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of this application can be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules.
  • an apparatus 1300 provided in an embodiment of this application is used to implement the functions of the terminal device or the access network device in the foregoing method.
  • the access network equipment includes a first access network equipment, a second access network equipment, and a third access network equipment.
  • the device may be the access network device, or a device in the access network device, or a device that can be used in matching with the access network device.
  • the device may be a terminal device, a device in a terminal device, or a device that can be matched and used with the terminal device.
  • the device can be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 1300 includes at least one processor 1320, configured to implement the functions of the terminal device or the access network device in the method provided in the embodiment of the present application.
  • the apparatus 1300 may further include a communication interface 1310.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, which is used to communicate with other devices through a transmission medium.
  • the communication interface 1310 is used for the device in the device 1300 to communicate with other devices.
  • the apparatus 1300 is a first access network device
  • the other device may be a second access network device or a terminal device.
  • the other device When the apparatus 1300 is a second access network device, the other device may be a first access network device, a third access network device, or a terminal device. When the apparatus 1300 is a third access network device, the other device may be a second access network device, a first access network device, or a terminal. When the apparatus 1300 is a terminal, the other device may be a first access network device, a second access network device, or a third access network device.
  • the processor 1320 uses the communication interface 1310 to send and receive data, and is used to implement the method described in the foregoing method embodiment.
  • the processor 1320 when the function of the first access network device is implemented, the processor 1320 is configured to determine to request the second access network device to allocate resources for the terminal; the communication interface 1310 is configured to send the first access network device to the second access network device. Message, the first message is used to instruct the second access network device to broadcast the SBB.
  • the processor 1320 and the communication interface 1310 may also be used to execute other steps performed by the above-mentioned first access network device, which will not be repeated here.
  • the processor 1320 invokes the communication interface 1310 to execute the transceiving operations performed by the first access network device in each of the foregoing embodiments of FIG. 4 to FIG. 11.
  • the processor 1320 is further configured to perform operations of the first access network device in addition to the receiving and sending operations in each of the foregoing embodiments of FIGS. 4 to 11.
  • the communication interface 1310 is used to receive a first message from the first access network device, and the first message is used to instruct the second access network device to broadcast the SBB; processor 1320, used to call the communication interface 1310 to broadcast the SBB according to the first message.
  • the processor 1320 and the communication interface 1310 may also be used to execute other steps performed by the above-mentioned second access network device, which will not be repeated here.
  • the processor 1320 calls the communication interface 1310 to execute the transceiving operations performed by the second access network device in each of the foregoing embodiments of FIG. 4, FIG. 5, and FIG. 7 to FIG. 11.
  • the processor 1320 is also configured to perform operations of the second access network device other than the receiving and sending operations in the above-mentioned embodiments of FIG. 4, FIG. 5, and FIG. 7 to FIG.
  • the processor 1320 and the communication interface 1310 may be used to execute the steps performed by the third access network device in the foregoing method embodiment, and details are not described herein again.
  • the processor 1320 calls the communication interface 1310 to execute the transceiving operation performed by the third access network device in each embodiment of FIG. 7 or FIG. 8.
  • the processor 1320 is further configured to perform operations of the third access network device in each embodiment of FIG. 7 or FIG. 8 except for the receiving and sending operations.
  • the processor 1320 is configured to receive the information of the broadcast period from the first access network device through the communication interface 1310, where the broadcast period is the period in which the second access network device broadcasts the SBB; and Receiving the SBB from the second access network device according to the broadcast period.
  • the processor 1320 and the communication interface 1310 may also be used to perform other corresponding steps or operations performed by the terminal in the foregoing method embodiment, which will not be repeated here.
  • the processor 1320 and the communication interface 1310 may also be used to execute other steps executed by the above-mentioned terminal, which will not be repeated here.
  • the processor 1320 calls the communication interface 1310 to execute the receiving and sending operations performed by the terminal in the above-mentioned embodiments of FIGS. 5-11.
  • the processor 1320 is also configured to perform operations of the terminal in addition to the receiving and sending operations in the above-mentioned respective embodiments of FIG. 5 to FIG. 11.
  • the device 1300 may further include at least one memory 1330 for storing program instructions and/or data.
  • the memory 1330 and the processor 1320 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1320 may operate in cooperation with the memory 1330.
  • the processor 1320 may execute program instructions stored in the memory 1330. At least one of the at least one memory may be included in the processor.
  • the embodiment of the present application does not limit the specific connection medium between the communication interface 1310, the processor 1320, and the memory 1330.
  • the memory 1330, the communication interface 1320, and the communication interface 1310 are connected by a bus 1340.
  • the bus is represented by a thick line in FIG. 13, and the connection mode between other components is only for schematic illustration. , Is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of presentation, only one thick line is used in FIG. 13, but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or Perform the methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random-access memory (random-access memory, RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function for storing program instructions and/or data.
  • the embodiments of the present application provide a computer-readable storage medium that stores computer-readable instructions.
  • the computer-readable instructions run on a communication device, the communication device executes the foregoing method embodiments.
  • the embodiments of the present application provide a computer program product containing instructions.
  • the computer program product runs on a communication device, the communication device executes the foregoing method embodiments.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Abstract

一种同步信号/广播信号块的广播方法及装置。方法包括：第一接入网设备RAN1确定请求第二接入网设备RAN2为终端分配资源，RAN1向RAN2发送用于指示RAN2广播同步信号/广播信号块SSB的第一消息。RAN2相应开始广播SSB。第一消息还可包括SSB的广播周期。广播周期还可由RAN1发送给终端。RAN2可根据具体情况停止广播SSB。例如，RAN2向RAN1发送终端的接入状态报告，RAN1参考接入状态报告通知RAN2停止广播。SSB的开始广播和停止广播可以按照小区粒度进行。方法及装置适用双连接或切换场景，能应用在5G或未来通信系统中，实现系统能耗的降低。

Description

一种同步信号/广播信号块的广播方法及装置 技术领域
本申请涉及通信技术领域，特别涉及一种同步信号/广播信号块的广播方法及装置。
背景技术
网络系统中高能耗是一个痛点问题。
发明内容
本申请提供一种同步信号/广播信号块的广播方法及装置，以期降低系统能耗。
第一方面，提供一种同步信号/广播信号块SSB的广播方法。该方法可以按照下述步骤实现：第一接入网设备确定请求第二接入网设备为终端分配资源，第一接入网设备向第二接入网设备发送第一消息，所述第一消息用于指示所述第二接入网设备广播同步信号/广播信号块(synchronization signal/PBCH block,SSB)SSB。第一接入网设备在确定请求第二接入网设备为终端分配资源时，向第二接入网设备发送用于指示广播SSB的消息。第一接入网设备确定请求第二接入网设备为终端分配资源,通过第一接入网设备指示第二接入网设备广播SSB，能够使得第二接入网设备在接收到指示的时候，才开始广播SSB，避免第二接入网设备一直广播SSB，能够降低第二接入网设备能耗，从而降低整个系统的能耗。
在一个可能的设计中，所述第一消息包括广播周期，所述广播周期为所述第二接入网设备广播SSB的周期。通过第一接入网设备向第二接入网设备发送该广播周期，第二接入网设备可以按照该广播周期来广播SSB。在另一个可能的设计中，第一接入网设备向第二接入网设备发送包括广播周期的消息，所述广播周期为所述第二接入网设备广播SSB的周期。该消息可以是除第一消息之外的其他消息。通过第一接入网设备向第二接入网设备发送包括广播周期的消息，第二接入网设备可以按照该广播周期来广播SSB。通过设置广播周期可以使得系统更灵活、更低能耗。例如，设置广播周期大于默认周期，可以进一步节省能耗。若设置广播周期小于默认周期，能够使得终端更快的接入第二接入网设备。
在一个可能的设计中，第一接入网设备向终端发送广播周期。所述广播周期为所述第二接入网设备广播SSB的周期。这样，使得终端获得第二接入网设备广播SSB的广播周期，从而终端可以按照该广播周期来接收第二接入网设备的SSB。这样能够避免终端按照其他周期搜索SSB，因搜索不到SSB而选择其他的网络接入，有助于保证终端正常接入第二接入网设备。
在一个可能的设计中，所述第一接入网设备向所述第二接入网设备发送第二消息，所述第二消息用于指示所述第二接入网设备停止广播SSB。通过指示停止广播SSB，能进一步节省第二接入网设备的能耗开销，从而进一步降低系统能耗。
在一个可能的设计中，在所述第一接入网设备向所述第二接入网设备发送第二消息之前，所述第一接入网设备接收来自所述第二接入网设备的第三消息，所述第三消息用于指示终端接入第二接入网设备的状态。可选的，终端接入第二接入网设备的状态可以是被请求分配资源的终端接入第二接入网设备的状态。这样，通过第三消息使得第一接入网设备能够获知终端接入第二接入网设备的情况，从而第一接入网设备能够根据第三消息指示的 终端接入第二接入网设备的状态，来判断是否向所述第二接入网设备指示停止广播SBB，进一步地，通过及时向第二接入网指示停止广播SBB，能够节省第二接入网设备的能耗。
在一个可能的设计中，终端接入第二接入网设备的状态具体可以包括：(1)所有终端已接入第二接入网设备；(2)部分终端已接入第二接入网设备。在第(2)种可能的情况下，第三消息可以携带接入第二接入网设备的终端的标识；和/或，第三消息可以携带未接入第二接入网设备的终端的标识。
在一个可能的设计中，第一接入网设备接收来自第二接入网设备用于指示第二接入网设备决定停止广播SBB的消息。通过停止广播SBB，能节省第二接入网设备的能耗开销。这样，第一接入网设备可以根据该消息确定第二接入网设备已决定停止广播SBB。并在后续需要第二接入网设备为终端分配资源时，再次向第二接入网设备发送与第一消息功能相同/相似的消息。
在一个可能的设计中，第一接入网设备向终端发送第四消息，第四消息可以包括一个门限，记为第一门限；或者第四消息用于指示终端的上报条件，例如该上报条件包括终端在测量的第一接入网设备的下行信号强度大于或等于第一门限时触发上报。第一接入网设备通过向终端发送第四消息指示终端上报，从而能够根据终端的上报内容确定可以请求第二接入网设备为终端分配资源，从而第一接入网设备可以指示第二接入网设备广播SBB。进一步地，通过第一接入网设备指示第二接入网设备广播SBB，能够使得第二接入网设备在接收到指示的时候，开始广播SBB，相比第二接入网设备一直广播SBB的方案，能够降低第二接入网设备能耗。
在一个可能的设计中，所述第一接入网设备接收来自所述终端的第五消息，第五消息可以包括终端测量的第一接入网设备的下行信号强度；或者，第五消息可以用于指示终端测量的第一接入网设备的下行信号强度大于或等于第一门限。当应用在双连接架构或多连接架构下时，第一接入网设备能够通过终端上报的第五消息来判断第二接入网设备是否适合为该终端分配资源，从而第一接入网设备确定指示第二接入网设备广播SSB。进一步地，通过第一接入网设备指示第二接入网设备广播SSB，能够使得第二接入网设备在接收到指示的时候，开始广播SSB，相比第二接入网设备一直广播SSB的方案，能够降低第二接入网设备的能耗。
在一个可能的设计中，第一接入网设备向终端发送第六消息，第六消息可以包括一个门限，记为第二门限；或者第六消息用于指示终端的上报条件，例如该上报条件包括终端在测量的第二接入网设备的下行信号强度大于或等于第二门限时触发上报。第一接入网设备通过向终端发送第六消息指示终端上报，能够使得终端根据第二接入网设备的下行信号强度来触发上报。使得第一接入网设备能够从终端获取更准确的信息，来判断是否可以请求第二接入网设备为终端分配资源。在判断为是时，第一接入网设备可以指示第二接入网设备广播SSB。进一步地，通过第一接入网设备指示第二接入网设备广播SSB，能够使得第二接入网设备在接收到指示的时候，开始广播SSB，相比第二接入网设备一直广播SSB的方案，能够降低第二接入网设备能耗。
在一个可能的设计中，所述第一接入网设备接收来自所述终端的第七消息，第七消息可以包括终端测量的第二接入网设备的下行信号强度；或者，第七消息可以用于指示终端测量的第二接入网设备的下行信号强度大于或等于第二门限。第一接入网设备能够通过终端上报的第七消息，更精确的判断第二接入网设备是否适合为终端分配资源。在判定为是 时，第一接入网设备可以指示第二接入网设备广播SSB。进一步地，通过第一接入网设备指示第二接入网设备广播SSB，能够使得第二接入网设备在接收到指示的时候，开始广播SSB，相比第二接入网设备一直广播SSB的方案，能够降低第二接入网设备的能耗。
在一个可能的设计中，所述第一接入网设备接收来自第三接入网设备的第八消息，所述第八消息用于指示所述终端的辅助接入网设备需要从所述第三接入网设备切换到所述第二接入网设备，或者用于指示需要添加所述第二网络设备为所述终端的辅接入网设备。第三接入网设备为辅接入网设备，在切换场景下，通过第一接入网设备从第三接入网设备接收指示切换的消息，来确定指示第二接入网设备开始广播SSB的时机。进一步地，通过第一接入网设备指示第二接入网设备广播SSB，能够使得第二接入网设备在接收到指示的时候，开始广播SSB，相比第二接入网设备一直广播SSB的方案，能够降低第二接入网设备能耗。
在一个可能的设计中，所述第二接入网设备为gNB。
在一个可能的设计中，第一消息可以小区粒度指示第二接入网设备广播SBB。例如，第一消息中携带一个或多个小区的标识，用于指示第二接入网设备的该一个或多个小区广播SBB。
在一个可能的设计中，第二消息可以小区粒度指示停止第二接入网设备广播SBB。例如，第一消息中携带一个或多个小区的标识，用于指示停止第二接入网设备的该一个或多个小区广播SBB。
第二方面，提供一种SBB的广播方法，该方法可以通过以下步骤实现：第二接入网设备接收来自第一接入网设备的第一消息；所述第二接入网设备根据所述第一消息广播SBB。通过第二接入网设备在接收到第一消息时再开始广播SBB，避免第二接入网设备一直广播SBB，能够降低第二接入网设备能耗，从而降低整个系统的能耗。
在一个可能的设计中，所述第一消息包括广播周期，所述广播周期为所述第二接入网设备广播SSB的周期。通过第二接入网设备从第一接入网设备接收该广播周期，第二接入网设备可以按照该广播周期来广播SSB。在另一个可能的设计中，第二接入网设备接收来自第一接入网设备发送的包括广播周期的消息，所述广播周期为所述第二接入网设备广播SSB的周期。通过第二接入网设备接收来自第一接入网设备的包括广播周期的消息，第二接入网设备可以按照该广播周期来广播SSB。若该广播周期大于默认的广播周期，通过增大第二接入网设备广播SSB的周期，可以进一步节省能耗；若该广播周期大于默认的广播周期，能够使得终端更快的接入第二接入网设备。
在一个可能的设计中，所述第二接入网设备向所述第一接入网设备发送消息，该消息包括广播周期，所述广播周期为所述第二接入网设备广播SSB的周期。通过第二接入网设备向第一接入网设备指示自身广播SSB的广播周期，第一接入网设备可以将广播周期发送给终端，使得终端获得第二接入网设备的广播周期。按照第二接入网设备的广播周期接收SSB。避免终端按照其他周期搜索SSB时，SSB因搜索不到SSB而选择其他的网络接入，有助于保证终端正常接入第二接入网设备。
在一个可能的设计中，第二接入网设备停止广播SBB。
在一个可能的设计中，所述第二接入网设备接收来自所述第一接入网设备的第二消息；所述第二接入网设备根据所述第二消息，停止广播SBB。通过指示停止广播SBB，能进一步节省第二接入网设备的能耗开销。
在一个可能的设计中，在向所述第二接入网设备发送第二消息之前，所述第二接入网设备向所述第一接入网设备发送第三消息，所述第三消息用于指示终端接入第二接入网设备的状态。可选的，终端接入第二接入网设备的状态可以是被请求分配资源的终端接入第二接入网设备的状态。这样，通过第三消息使得第一接入网设备能够获知终端接入第二接入网设备的情况，从而第一接入网设备能够根据第三消息指示的终端接入第二接入网设备的状态，来判断是否向所述第二接入网设备指示停止广播SBB，进一步地，通过及时向第二接入网设备指示停止广播SBB，能够进一步节省第二接入网设备的能耗。
在一个可能的设计中，终端接入第二接入网设备的状态具体可以包括：(1)所有终端已接入第二接入网设备；(2)部分终端已接入第二接入网设备。在第(2)种可能的情况下，第三消息可以携带接入第二接入网设备的终端的标识；和/或，第三消息可以携带未接入第二接入网设备的终端的标识。
在一个可能的设计中，所述第二接入网设备根据自身的情况决定停止广播SBB。所述自身的情况可以是指，终端接入第二接入网设备的状态。通过第二接入网设备及时停止广播SBB，能够节省第二接入网设备广播SBB的能耗。
在一个可能的设计中，在第二接入网设备决定停止广播SBB的情况下，第二接入网设备还可以通知第一接入网设备：第二接入网设备决定停止广播SBB。
在一个可能的设计中，第二接入网设备接收来自第三接入网设备的该上行测量配置，该上行测量配置中可以包括上行测量信号的资源的信息，该上行测量配置可以用于通知第二接入网设备接收终端的上行测量信号。所述第二接入网设备向第三接入网设备发送上行测量报告，所述上行测量报告包括从终端接收到的上行参考信号强度大于或等于第二门限，或从终端接收到的上行测量信号的强度值。这样，可以使得第三接入网设备根据该上行测量报告决定切换事件，即决定将终端的辅接入网设备从第三接入网设备切换到第二接入网设备。进一步地，第三接入网设备可以向第一接入网设备发送请求消息来请求第一接入网设备发起切换，即将终端的辅助接入网设备从第三接入网设备切换到第二接入网设备，从而终端能够获得更好的辅接入网设备的服务。
在一个可能的设计中，第一消息可以小区粒度指示第二接入网设备广播SBB。例如，第一消息中携带一个或多个小区的标识，用于指示第二接入网设备的该一个或多个小区广播SBB。
在一个可能的设计中，第二消息可以小区粒度指示停止第二接入网设备广播SBB。例如，第一消息中携带一个或多个小区的标识，用于指示停止第二接入网设备的该一个或多个小区广播SBB。
第三方面，提供一种辅接入网设备的切换方法，该方法的执行主体为第三接入网设备，该方法可以通过以下步骤来实现：第三接入网设备接收来自第二接入网设备的消息，该消息可以是上行测量报告，所述消息可以包括第二接入网设备从终端接收的上行测量信号强度大于第二门限的信息；所述第三接入网设备向第一接入网设备发送请求消息，所述请求消息用于指示所述终端的辅助接入网设备需要从所述第三接入网设备切换到所述第二接入网设备。这样第一接入网设备可以在接收到该请求消息时，确定第二接入网设备需要为终端分配资源，即可以进一步确定指示第二接入网设备广播SBB的时机。避免第二接入网设备一直广播SBB，能够降低第二接入网设备能耗，从而降低整个系统的能耗。
在一个可能的设计中，所述第三接入网设备向所述第二接入网设备发送上行测量配置， 所述上行测量配置中可以包括上行测量信号的资源的信息，该上行测量配置可以用于通知第二接入网设备接收终端的上行测量信号。这样，第二接入网设备收到该上行测量配置以后，就可以在该上行测量配置指示的资源上接收终端发送的上行测量信号，从而判断终端是否移动到了自己的服务范围。
在一个可能的设计中，所述上行测量配置包括所述第二门限或事件触发信息。该第二门限或事件触发信息可以用于指示第二接入网设备在满足一定的条件后，向第三接入网设备发送上行测量报告。
在一个可能的设计中，所述上行测量配置包括所述终端的标识。
在一个可能的设计中，第三接入网设备向终端发送上行测量配置。通过第三接入网设备向终端发送上行测量配置，终端按照上行测量配置指示的资源上发送上行测量信号，第二接入网设备才会在上行测量配置指示的资源上检测到终端发送的上行测量信号。
第四方面，提供一种SBB的广播方法该方法可以包括以下步骤：终端接收来自第一接入网设备的消息，记为第四消息，第四消息可以包括一个门限，记为第一门限；或者第四消息用于指示终端的上报条件，例如该上报条件包括终端在测量的第一接入网设备的下行信号强度大于或等于第一门限时触发上报。所述终端向所述第一接入网设备发送第五消息，第五消息可以包括终端测量的第一接入网设备的下行信号强度；或者，第五消息可以用于指示终端测量的第一接入网设备的下行信号强度大于或等于第一门限。通过接收第四消息，可以在满足上报条件时向第一接入网设备上报第五消息，从而使得第一接入网设备能够通过终端上报的第五消息，确定第二接入网适合做该终端的辅助接入网设备。进一步的，第一接入网设备可以指示第二接入网设备广播SBB，实现第二接入网设备根据第一接入网设备的指示广播SSB，在不广播SBB时达到节能的目的。
可选的，下行信号强度可以是下行信号功率或者信噪比。
在一个可能的设计中，第四消息可以是广播消息，则第五消息可以是RRC消息。或者，第四消息中包括的是测量配置信息，则第五消息可以是测量报告。
在一个可能的设计中，所述终端测量的第一接入网设备的下行信号强度大于或等于所述第一门限时，向所述第一接入网设备发送所述第五信息。
在一个可能的设计中，所述终端接收来自所述第一接入网设备的广播周期，所述广播周期为第二接入网设备向终端发送SBB的周期。通过第一接入网设备将广播周期发送给终端，使得终端获得第二接入网设备的广播周期。按照第二接入网设备的广播周期接收SBB。避免终端按照短周期搜索SBB时，因搜索不到SBB而选择其他的网络接入，有助于保证终端正常接入第二接入网设备。
第五方面，提供一种SBB的广播方法，该方法可以通过以下步骤来实现：终端接收来自第一接入网设备的包括广播周期的消息，所述广播周期为第二接入网设备广播SBB的周期；所述终端根据所述广播周期接收来自所述第二接入网设备的SBB。通过终端从第一接入网设备接收到第二接入网设备广播SBB的周期，使得终端可以按照该周期来检测第二接入网设备广播的SBB，避免终端按照其它周期搜索SBB时，因搜索不到SBB而选择其他的网络接入，有助于保证终端正常接入第二接入网设备。
在一个可能的设计中，所述广播周期为所述第二接入网设备的一个或多个小区广播SBB的周期；所述终端根据所述广播周期接收来自所述第二接入网设备的一个或多个小区的SBB。
第六方面，提供一种SBB的广播方法，该方法可以通过以下步骤实现：第一接入网设备确定请求第二接入网设备为终端分配资源，第一接入网设备向第二接入网设备发送第一消息，该第一消息中携带第二接入网设备广播公共控制信号的第二广播周期，第二广播周期小于第一广播周期，所述第一广播周期是所述第一接入网设备向所述第二接入网设备发送第一消息之前所述第二接入网设备广播公共控制信号的周期。
再一方面，提供一种SBB的广播方法，该方法可以通过以下步骤实现：第二接入网设备以第一广播周期广播SBB。第一接入网设备向第二接入网设备发送第一消息，该第一消息中携带第二接入网设备广播SBB的第二广播周期，第二接入网设备接收第一接入网设备发送的该第一消息；或者，第二接入网设备确定广播SBB的第二广播周期，并向第一接入网设备发送第二消息，该第二消息中携带该第二接入网设备确定的第二广播周期。第一接入网设备接收第二接入网设备发送的该第二消息。第二广播周期可以大于或小于第一广播周期。若第二广播周期大于第一广播周期，通过增大第二接入网设备广播SBB的周期，可以进一步节省能耗。若第二广播周期小于第一广播周期，第一接入网设备确定第二接入网设备为终端分配资源的时候，可以向第二接入网设备发送该第一消息，可以通过该第一消息指示第二接入网设备将第一广播周期调整为第二广播周期，第二广播周期小于第一广播周期，所以第二接入网设备的广播周期认为是由长周期变为短周期，这样，能够使得终端更快的接入第二接入网设备。第二接入网设备以较长的第一广播周期广播SBB，相比关闭广播SBB来说，不需要频繁开始和停止广播SBB，从而节省因开始和停止广播SBB带来的信令开销。
在一个可能的设计中，第一接入网设备向终端发送第二消息，终端接收第一接入网设备发送的第二消息。该消息中携带第二接入网设备广播SBB的第二广播周期的信息。通过第一接入网设备将第二接入网设备广播SBB的第二广播周期发送给终端，使得终端可以按照第二接入网设备的广播周期接收SBB。避免终端按照小于第二接入网设备广播周期的周期搜索SBB时，SBB因搜索不到SBB而选择其他的网络接入，有助于终端正常接入第二接入网设备。
在一个可能的设计中，该第一消息中携带一个或多个小区的标识，用于指示第二接入网设备的该一个或多个小区广播SBB的第二广播周期。
在一个可能的设计中，该第一消息中携带一个或多个小区的标识，用于指示第二接入网设备的该一个或多个小区广播SBB的第二广播周期。
第七方面，提供一种通信装置，该通信装置可以是接入网设备，例如第一接入网设备，也可以是第一接入网设备中的装置(例如，芯片，或者芯片系统，或者电路)，或者是能够和第一接入网设备匹配使用的装置。一种设计中，该通信装置可以包括执行第一方面或第六方面中所描述第一接入网设备执行的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该通信装置可以包括处理模块和通信模块。处理模块用于调用通信模块执行接收和/或发送的功能。示例性地：处理模块，用于确定请求第二接入网设备为终端分配资源；通信模块，用于向第二接入网设备发送第一消息，所述第一消息用于指示所述第二接入网设备广播SBB。
第八方面，提供一种通信装置，该通信装置可以是接入网设备，例如第二接入网设备，也可以是第二接入网设备中的装置(例如，芯片，或者芯片系统，或者电路)，或者是能够和第二接入网设备匹配使用的装置。一种设计中，该通信装置可以包括执行第二方面或 第六方面中所描述第二接入网设备执行的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该通信装置可以包括处理模块和通信模块。处理模块用于调用通信模块执行接收和/或发送的功能。示例性地：通信模块，用于接收来自第一接入网设备的第一消息；处理模块，用于根据所述第一消息调用所述通信模块广播SBB。
第九方面，提供一种通信装置，该通信装置可以是接入网设备，例如第三接入网设备，也可以是第三接入网设备中的装置(例如，芯片，或者芯片系统，或者电路)，或者是能够和第二接入网设备匹配使用的装置。一种设计中，该通信装置可以包括执行第三方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该通信装置可以包括处理模块和通信模块。处理模块用于调用通信模块执行接收和/或发送的功能。示例性地：通信模块，用于接收来自第二接入网设备的上行测量报告，所述上行测量报告包括所述第二接入网设备从终端接收的上行测量信号的功率大于设定阈值的信息；所述通信模块，还用于向第一接入网设备发送请求消息，所述请求消息用于指示所述终端需要从所述第三接入网设备切换到所述第二接入网设备。
第十方面，提供一种通信装置，该通信装置可以是终端，也可以是终端中的装置(例如，芯片，或者芯片系统，或者电路)，或者是能够和终端匹配使用的装置。一种设计中，该通信装置可以包括执行第四方面或第五方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该通信装置可以包括处理模块和通信模块。处理模块用于调用通信模块执行接收和/或发送的功能。示例性地：通信模块，用于接收来自第一接入网设备的广播消息，所述广播消息包括触发事件信息，所述触发事件信息用于指示所述终端的上报条件。所述通信模块，还用于向所述第一接入网设备发送无线资源控制RRC消息，所述RRC消息包括指示信息，所述指示信息用于指示所述终端满足所述上报条件。示例性地：通信模块，用于接收来自第一接入网设备的广播周期的信息，所述广播周期为第二接入网设备广播SBB的周期；以及用于根据所述广播周期接收来自所述第二接入网设备的SBB。
第十一方面，本申请实施例提供一种通信装置，例如该通信装置为第一接入网设备，所述通信装置包括通信接口和处理器，所述通信接口用于该装置与其它设备进行通信，例如数据或信号的收发。示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为第二接入网设备或终端。处理器用于调用一组程序、指令或数据，执行上述第一方面描述的方法。所述装置还可以包括存储器，用于存储处理器调用的程序、指令或数据。所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的、指令或数据时，可以实现上述第一方面描述的方法。
第十二方面，本申请实施例提供一种通信装置，例如该通信装置为第二接入网设备，所述通信装置包括通信接口和处理器，所述通信接口用于该装置与其它设备进行通信，例如数据或信号的收发。示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为第一接入网设备、第三接入网设备或终端。处理器用于调用一组程序、指令或数据，执行上述第二方面描述的方法。所述装置还可以包括存储器，用于存储处理器调用的程序、指令或数据。所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的、指令或数据时，可以实现上述第二方面描述的方法。
第十三方面，本申请实施例提供一种通信装置，例如该通信装置为第三接入网设备，所述通信装置包括通信接口和处理器，所述通信接口用于该装置与其它设备进行通信，例如数据或信号的收发。示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为第一接入网设备、第二接入网设备或终端。处理器用于调用一组程序、指令或数据，执行上述第三方面描述的方法。所述装置还可以包括存储器，用于存储处理器调用的程序、指令或数据。所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的、指令或数据时，可以实现上述第三方面描述的方法。
第十四方面，本申请实施例提供一种通信装置，所述通信装置包括通信接口和处理器，所述通信接口用于该装置与其它设备进行通信，例如数据或信号的收发。示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为第一接入网设备。处理器用于调用一组程序、指令或数据，执行上述第四方面或第五方面描述的方法。所述装置还可以包括存储器，用于存储处理器调用的程序、指令或数据。所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的、指令或数据时，可以实现上述第四方面描述的方法。
第十五方面，本申请实施例中还提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当所述计算机可读指令在计算机上运行时，使得计算机执行如各方面或各方面中任一种可能的设计中所述的方法。
第十六方面，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述第一方面或第一方面中任一种可能的设计中所述的方法，或用于实现上述第六方面或第六方面中任一种可能的设计中所述第一接入网设备执行的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十七方面，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述第二方面或第二方面中任一种可能的设计中所述的方法，或用于实现上述第六方面或第六方面中任一种可能的设计中所述第二接入网设备执行的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十八方面，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述第三方面或第三方面中任一种可能的设计中所述的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十九方面，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述第四方面、第五方面、第四方面中任一种可能的设计或第五方面中任一种可能的设计中所述的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第二十方面，本申请实施例提供了一种系统，所述系统包括第一接入网设备和第二接入网设备，所述第一接入网设备用于执行上述第一方面或任一可能的设计中的方法，所述第二接入网设备用于执行上述第二方面或任一可能的设计中的方法。
在一个可能的设计中，所述系统还包括第三接入网设备，所述第三接入网设备用于执行上述第三方面或任一可能的设计中的方法。
在一个可能的设计中，所述系统还包括终端，所述终端用于执行上述第四方面、第五方面、第四方面或第五方面的任一可能的设计中的方法。
第二十一方面，本申请实施例提供了一种系统，所述系统包括第一接入网设备和第二 接入网设备，第一接入网设备用于，确定请求第二接入网设备为终端分配资源；向第二接入网设备发送第一消息，所述第一消息用于指示所述第二接入网设备开始广播SBB；所述第二接入网设备用于，接收来自第一接入网设备第一消息，根据该第一消息广播SBB。
附图说明
图1为本申请实施例中通信系统架构示意图；
图2是本申请实施例中基于非独立组网(non-standalone，NSA)的系统架构示意图；
图3为本申请实施例中基于独立组网(standalone，SA)的系统架构示意图；
图4为本申请实施例中SBB的广播方法流程示意图之一；
图5为本申请实施例中SBB的广播方法流程示意图之二；
图6为本申请实施例提供的一种通信方法的流程示意图；
图7为本申请实施例提供的另一种通信方法的流程示意图；
图8为本申请实施例提供的再一种通信方法的流程示意图；
图9为本申请实施例中SBB的广播方法的流程示意图之三；
图10为本申请实施例中SBB的广播方法的流程示意图之四；
图11为本申请实施例中SBB的广播方法的流程示意图之五；
图12为本申请实施例中通信装置结构示意图之一；
图13为本申请实施例中通信装置结构示意图之二。
具体实施方式
本申请实施例提供的一种SBB的广播方法及装置。装置与方法的实施可以相互参见，重复之处不再赘述。本申请实施例的描述中，“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。本申请中所涉及的至少一个是指一个或多个；多个，是指两个或两个以上。
另外，需要理解的是，在本申请的描述中，“第一”、“第二”、“第三”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。本申请实施例提供的SBB的广播方法可以应用于第五代5G通信系统，例如5G新空口(new radio，NR)通信系统，还可以应用于未来的各种通信系统。
下面将结合附图，对本申请实施例进行详细描述。
结合图1所示，为本申请实施例提供的SBB的广播方法可以适用的一种通信系统。通信系统包括第一接入网设备101-1和第二接入网设备101-2。该通信系统还可以包括终端设备102和核心网设备103。接入网设备或终端设备可以是硬件，也可以是从功能上划分的软件或者以上二者的结合。第一接入网设备101-1和第二接入网设备101-2可以通过接口(例如，Xn接口或X2接口)相连。第一接入网设备101-1或第二接入网设备101-2可以向终端设备102发送下行数据，也可以接收终端设备102发送的上行数据。
第一接入网设备101-1和第二接入网设备101-2，为无线接入网(radio access network，RAN)中的节点，又可以称为基站，还可以称为RAN节点(或设备)。一些接入网设备的例子可以包括：下一代基站(next generationnodeB，gNB)、下一代演进的基站(next  generationevolved nodeB，Ng-eNB)、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)，或5G通信系统中的接入网设备，或者未来可能的通信系统中的接入网设备。
用于实现接入网设备的功能的装置可以是接入网设备；也可以是能够支持接入网设备实现该功能的装置，例如芯片系统，该装置可以被安装在接入网设备中。以下描述本申请实施例提供的技术方案时，以用于实现接入网设备的功能的装置是接入网设备为例，来描述本申请实施例提供的技术方案。
终端设备102，又可以称之为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等，是一种向用户提供语音或数据连通性的设备，也可以是物联网设备。例如，终端设备102包括具有无线连接功能的手持式设备、车载设备等。终端设备102可以是：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备(例如智能手表、智能手环、计步器等)，车载设备(例如，汽车、自行车、电动车、飞机、船舶、火车、高铁等)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、智能家居设备(例如，冰箱、电视、空调、电表等)、智能机器人、车间设备、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端，或智慧家庭(smart home)中的无线终端、飞行设备(例如，智能机器人、热气球、无人机、飞机)等。
本申请实施例中，用于实现终端设备的功能的装置可以是终端设备；也可以是能够支持终端设备实现该功能的装置，例如芯片系统，该装置可以被安装在终端设备中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中，以用于实现终端设备的功能的装置是终端或UE为例，来描述本申请实施例提供的技术方案。
本申请实施例中，术语“通信”还可以描述为“数据传输”、“信息传输”或“传输”。该技术方案可用于进行调度实体和从属实体间的无线通信，本领域技术人员可以将本申请实施例提供的技术方案用于进行其它调度实体和从属实体间的无线通信，例如宏基站和微基站之间的无线通信。
在本申请中，“指示”可以包括直接指示和间接指示，也可以包括显式指示和隐式指示。将某一信息所指示的信息称为待指示信息，则具体实现过程中，对待指示信息进行指示的方式可以有很多种，例如但不限于，可以直接指示待指示信息，如指示待指示信息本身或者该待指示信息的索引等。也可以通过指示其他信息来间接指示待指示信息，其中该其他信息与待指示信息之间存在关联关系。还可以仅仅指示待指示信息的一部分，而待指示信息的其他部分则是已知的或者提前约定的。例如，还可以借助预先约定(例如协议规定)的各个信息的排列顺序来实现对特定信息的指示，从而在一定程度上降低指示开销。
本申请实施例中，当描述到一个消息的指示功能时，可以通过多种方式实现该指示功能。比如消息A用于指示B，则可以通过以下几种方式实现：消息A中包含指示B的指 示信息。或者消息A的消息类型指示B。或者消息A中包含指示B的信元。
本申请实施例中，SBB可以包括同步信号/广播信号块(synchronization signal/PBCH block,SSB)。SS/PBCH block可以被称为SSB。SSB可以包括以下至少一项：主同步信号(primary synchronization signal,PSS)，辅同步信号(secondary synchronization signal,SSS)，和物理广播信道(physical broadcast channel,PBCH)。
以下给出几种第一接入网设备101-1和第二接入网设备101-2的可能示例。
示例一：
图2是本申请实施例中基于NSA的系统架构示意图。如图2所示，第一接入网设备为4G通信系统中的(long term evolution，LTE)接入网设备(例如eNB)，第二接入网设备为5G NR中的接入网设备(例如gNB)。eNB与gNB可以通过接口(例如，X2-C接口)进行连接。核心网控制面设备为移动管理实体(mobility management entity，MME)。eNB与MME可以通过接口(例如，S1接口)相连。gNB与核心网控制面设备没有连接。终端从eNB接入网络，并连接到核心网，终端可以从eNB接收来自核心网的下行控制面数据。终端连接到gNB，可以接收来自gNB的数据面的下行数据。4G的用户面的核心网设备为服务网关(serving gateway，S-GW)。eNB和gNB与S-GW相连，可以通过S1-U接口相连。终端从eNB接入网络后，可以从eNB和gNB分别接收下行用户面数据。
示例二：
图3是本申请实施例中基于SA的系统架构示意图。如图3所示，第一接入网设备和第二接入网设备为5G NR中的基站(gNB)，例如第一接入网设备用gNB#1表示，第二接入网设备用gNB#2表示。两个gNB可以为终端提供双连接(dual-connectivity，DC)服务。其中一个gNB作为主接入网设备或主节点(master node，MN)，另外一个gNB作为辅接入网设备或辅节点(secondary node，SN)。MN和SN之间可以通过接口(例如，Xn-C接口)相连。核心网的控制面设备为接入和移动性管理功能(access and mobility management function，AMF)。MN与AMF可以通过接口(例如，NG-C接口)相连。SN与核心网没有控制面连接。终端从MN接入网络，并连接到核心网，终端可以从MN接收来自核心网的下行控制面数据。NR的用户面的核心网设备为用户面功能(user plane function，UPF)。MN和SN与UPF相连，可以通过NG-U接口相连。终端从MN接入网络后，可以从MN和SN分别接收下行用户面数据。图2和图3示出了本申请可以适用于控制面和数据面分离的架构。但值得注意的是，本申请并不局限于所举例的控制面和数据面分离的架构。
如图4所示，本申请实施例提供的SBB的广播方法的具体流程如下所述。
S400、第一接入网设备确定请求第二接入网设备为终端分配资源。
在双连接或多连接的场景下，S400也可以为：第一接入网设备确定添加第二接入网设备为终端的辅节点(secondary node)。相应地，第一接入网设备可以认为是主接入网设备，主接入网设备也可以称为主节点；第二接入网设备可以认为是辅接入网设备，辅接入网设备也可以称为辅节点。
本申请实施例还可以适用于其他场景，例如切换场景。相应地，S400也可以为：第一接入网设备确定将终端切换到第二接入网设备。此时，第一接入网设备可以认为是源接入网设备，第二接入网设备可以认为是目标接入网设备。
S401、第一接入网设备向第二接入网设备发送第一消息，第二接入网设备接收来自第一接入网设备的第一消息。该第一消息用于指示第二接入网设备广播SBB。
示例的，第一消息中可以包含指示信息，该指示信息用于指示第二接入网设备广播SBB。或者，第一消息的消息类型指示第二接入网设备广播SBB。或者，第一消息中可以包含指示第二接入网设备广播SBB的信元。可选的，该第一消息可以指示第二接入网设备下的一个或多个小区广播SBB。例如第一消息中携带一个或多个小区的标识，用于指示该一个或多个小区广播SBB。
在第一接入网设备确定请求第二接入网设备为终端分配资源的情况下，第一接入网设备指示第二接入网设备广播SBB，能够使得第二接入网设备在接收到指示的时候，才广播SBB，相比第二接入网设备一直广播SBB的方案，能够降低第二接入网设备能耗。第二接入网设备可以无需一直周期性地广播SBB，从而能够降低第二接入网设备能耗，进而降低整个系统的能耗。
示例的，第一消息还可用于指示第二接入网设备广播SBB和系统广播信息块1(System information blocks 1，SIB1)。这样，第二接入网设备广播SBB和SIB1后，终端即可以通过第二接入网的空口得到第二接入网的SIB1消息，从而获得第二接入网的接入参数，而无需从第一接入网设备的无线资源控制(RRC)消息中获得，节省了RRC信令。
在一种实施方式中，在第一接入网设备向第二接入网设备发送的第一消息中还可以携带广播周期，该广播周期是第二接入网设备广播SBB的周期。第二接入网设备接收来自第一接入网设备的第一消息后，开始广播SBB。当然，该广播周期也可以在除第一消息之外的其他消息中携带。若第二接入网设备接收到来自第一接入网设备的广播周期，则第二接入网设备会按照第一接入网设备指示的广播周期来广播SBB。
在另一种实施方式中，第二接入网设备可以自己决定其广播SBB的周期，并将该广播周期通知第一接入网设备。第一接入网设备也可进一步通知终端。
无论第二接入网设备通过第一接入网设备通知广播SBB的周期，还是自己决定广播SBB的周期，第二接入网设备都可以确定接下来广播SBB的周期。进一步地，通过第一接入网设备将第二接入网设备广播SBB的周期通知给终端，能够使得终端获取第二接入网设备广播SBB的周期，使得终端更准确的监听到第二接入网设备广播的SBB，从而终端可以正确接入第二接入网设备。
实际应用中，接入网设备广播SBB可能具有默认的周期，接入网设备会按照默认的周期来广播SBB，终端也会按照默认的周期来检测SBB。本申请实施例中，通过第一接入网设备向第二接入网设备通知广播SBB的周期(可以简称为广播周期)，或者第二接入网设备自身决定广播周期，至少具有以下有益效果。若广播周期大于默认的周期，通过增大第二接入网设备广播SBB的周期，可以进一步节省能耗。若广播周期小于默认的周期，通过减小第二接入网设备广播SBB的周期，可以加快终端接入第二接入网设备的速度。第一接入网设备还可以将该广播周期发送给终端，使得终端获得第二接入网设备SBB的广播周期。终端按照第二接入网设备的广播周期接收SBB。避免终端按照其他周期搜索SBB时，因搜索不到SBB而选择其他的网络接入，有助于保证终端正常接入第二接入网设备。以NSA架构为例，eNB作为主接入网设备，gNB作为辅接入网设备。gNB广播SBB(例如，SSB)的周期可为5ms、10ms、20ms、40ms、80ms、160ms中的任何一个。周期越小，终端接入速度越快，因为终端可以很快搜索到SBB，从而可以进行小区驻留以及小区接入。周期越大，能耗也就越低。在实际系统的部署中，可以默认采用20ms的SSB广播周期。在gNB低负载情况下，可以通过本申请实施例的方法确定大于20ms的广播周期来广播SSB，从 而节省gNB的能耗。
第一消息的消息名称没有限制。如果SBB包括SSB，第一消息可以是SSB广播请求(SSB broadcast request)消息。
第二接入网设备开始广播SSB后，陆续会有终端接收到SSB，终端基于SSB进行下行同步，接入到第二接入网设备。或者，终端基于SSB进行下行同步，并发送上行探测用参考信号(sounding reference signal，SRS)，从而使得第二接入网设备可以进行上行测量。
第二接入网设备广播SSB一段时间后，可以停止广播SSB，从而节省第二接入网设备的能耗。停止广播的触发时机可以由第二接入网设备决定，也可以由第一接入网设备决定，并通知第二接入网设备。
例如，在S401之后，还可能包括以下步骤。
S402、第二接入网设备停止广播SBB。
第二接入网设备停止广播SBB的实现方式可以是由第一接入网设备通知。例如，在S402之前，还可能包括以下步骤：
S403、第一接入网设备向第二接入网设备发送第二消息；第二接入网设备接收来自第一接入网设备的该第二消息。第二消息用于指示第二接入网设备停止广播SBB。
示例的，第二消息中可以包含指示第二接入网设备停止广播SBB的指示信息。或者第二消息的消息类型指示第二接入网设备停止广播SBB。或者，第二消息中可以包含指示第二接入网设备停止广播SBB的信元。可选的，第二消息可以小区粒度指示停止广播SBB。例如，第二消息中携带一个或多个小区的标识，用于指示该一个或多个小区停止广播SBB。
第二信息的消息名称没有限制，例如，第二信息可以是RAN配置更新(RAN configuration update)消息。
第一接入网设备可以根据一定的策略来决定向第二接入网设备发送该第二消息。例如，第一接入网设备可以根据是否需要第二接入网设备继续为终端提供资源来决定。一种实现方式如下：通过在步骤S403之前的步骤S404实现。
S404、第二接入网设备向第一接入网设备发送第三消息；第一接入网设备接收来自第二接入网设备的该第三消息。第三消息用于指示终端接入第二接入网设备的状态。
具体地，第三消息中可以包含用于指示终端接入第二接入网设备的状态的指示信息。或者，第三消息的消息类型指示终端接入第二接入网设备的状态。或者，第三消息中可以包含指示终端接入第二接入网设备的状态的信元。
其中，终端接入第二接入网设备的状态可以是S400中被请求分配资源的终端接入第二接入网设备的状态。终端接入第二接入网设备的状态具体可能包括：
(1)所有终端已接入第二接入网设备。
(2)部分终端已接入第二接入网设备。
在第(2)种可能的情况下，第三消息可以携带接入第二接入网设备的终端的标识；或者，第三消息携带未接入第二接入网设备的终端的标识；或者，第三消息携带被请求分配资源的各个终端的标识，以及每个标识对应的该终端是否接入第二接入网设备的信息。
若第三消息携带接入第二接入网设备的终端的标识，第一接入网设备可以根据接入第二接入网设备的终端的标识，确定未接入第二接入网设备的终端。
若第三消息携带未接入第二接入网设备的终端的标识，第一接入网设备可以根据未接入第二接入网设备的终端的标识，确定已接入第二接入网设备的终端。可选的，第二接入 网设备可以通过以下方式获得未接入第二接入网设备的终端的标识：第一接入网设备可以向第二接入网设备请求为多个终端分配资源，例如第一接入网设备可以向第二接入网设备发送请求为多个终端分配资源的消息，该消息中包括被请求分配资源的多个终端的标识。第二接入网设备根据该多个终端的标识和已经接入第二接入网设备的终端，可以确定未接入第二接入网设备的终端的标识。
若第三消息携带被请求分配资源的各个终端的标识以及每个标识对应的该终端是否接入第二接入网设备的信息，则第一接入网设备可以根据第三消息携带的该信息，确定被请求分配资源的各个终端接入第二接入网设备的状态。
(3)被请求分配资源的终端接入第二接入网设备的一个或多个小区的状态。
在第(3)种可能的情况下，第三消息可以携带终端的标识、小区的标识和指示信息，用于指示被请求分配资源的终端接入第二接入网设备下的小区的状态。第三消息也可以指示第二接入网设备下的每一个小区的终端接入情况。其中，一个小区的终端接入情况包括：处于该小区的服务范围内，且被请求分配该小区为SN的全部终端已成功接入该小区；或者处于该小区的服务范围内，且被请求分配该小区为SN的部分终端成功接入该小区，或者是否有被请求分配该小区为SN的终端需要接入该小区。
当第三消息以小区粒度指示被请求分配资源的终端接入第二接入网设备的状态时，第一接入网设备也可以以小区粒度向第二接入网设备发送第二消息。即，第二消息用于指示一个或多个小区停止广播SBB。
第三信息的消息名称没有限制，例如，第三消息可以是接入报告消息。
在S404的基础上，第一接入网设备可以根据第二接入网设备发送的第三消息，来确定向第二接入网设备发送该第二消息，以及确定第二消息所指示的内容。
第二接入网设备停止广播SBB的另一个可能的实现方式是，第二接入网设备根据自身的情况决定停止广播SBB。例如，在S402之前，还可能包括以下步骤：
S405、第二接入网设备根据自身的情况决定停止广播SBB。
举例来说，第一接入网设备确定请求第二接入网设备为终端1，终端2和终端3分配资源。第一接入网设备向第二接入网设备发送第一消息，指示第二接入网设备广播SBB。当终端1，终端2和终端3都成功接入到了第二接入网设备时，例如，终端1，终端2和终端3都已经完成了初始接入，第二接入网设备决定停止广播SBB。或者当第二接入网设备收到终端1，终端2和终端3接入成功的消息以后，第二接入网设备决定停止广播SBB。当终端1，终端2和终端3都已经成功接入到了第二接入网设备后，第二接入网设备可以启动定时器。若在该定时器超时之前，第二接入网设备再次收到指示开始广播SBB的消息，(例如，需要第二接入网设备为其它终端分配资源时，第一接入网设备会再发出该消息)SBB则继续广播SBB。若在该定时器超时后，第二接入网设备没有再次收到指示广播SBB的消息，则第二接入网设备停止广播SBB。
在第二接入网设备决定停止广播SBB的情况下，第二接入网设备还可以通知第一接入网设备：第二接入网设备决定停止广播SBB。例如，在S405之后，还可以包括S406。
S406、第二接入网设备向第一接入网设备发送用于指示第二接入网设备决定停止广播SBB的消息，第一接入网设备从第二接入网设备接收该消息。
S402与S406没有执行顺序的限制，可以交换顺序或同时进行。
这样，第一接入网设备可以确定第二接入网设备已决定停止广播SBB。并在后续需要 第二接入网设备为终端分配资源时，再次向第二接入网设备发送与第一消息功能相同/相似的消息。可选的，第二接入网设备可以以小区粒度通知第一接入网设备停止广播SBB。例如，通过在通知的消息中携带一个或多个小区的标识，可以向第一接入网设备指示：第二接入网设备决定针对该一个或多个小区的标识所指示的小区停止广播SBB。
综上，通过第一接入网设备指示第二接入网设备开始广播SBB，可以减少第二接入网设备一直广播SBB带来的能耗，从而减少整个系统的开销。通过指示第二接入网设备关闭广播SBB，可以进一步减少第二接入网设备广播SBB带来的能耗，从而减少整个系统的开销。
基于上述描述，以下以双连接架构或多连接架构为应用场景，对SBB的广播方法做进一步详细说明。第一接入网设备为主接入网设备。如图5所示，具体实现过程如下所述。
S501、第一接入网设备确定添加第二接入网设备为终端的辅节点(SN)。
在双连接架构或多连接架构的场景下，S400接入网设备确定第二接入网设备为终端分配资源的步骤，就可以描述为S501所述的步骤。
S502、第一接入网设备向第二接入网设备发送SgNB/SN增加请求(SgNB addition request)消息。第二接入网设备接收来自第一接入网设备的SgNB/SN增加请求消息。
在一个可能的实现方式中，该SgNB/SN增加请求消息中携带指示信息，例如该指示信息称为第一指示信息，该第一指示信息用于指示第二接入网设备广播SBB。可选的，该SgNB/SN增加请求消息中还可以携带第二接入网设备广播SBB的广播周期，记为广播周期1。
第二接入网设备可以在接收到该SgNB/SN增加请求消息时，开始广播SBB。
在另一个可能的实现方式中，该SgNB/SN增加请求消息中不包括该第一指示信息，即第一接入网设备不会在该SgNB/SN增加请求消息中携带指示第二接入网设备广播SBB的指示信息。或者，该SgNB/SN增加请求消息中可以包括第二指示信息，该第二指示信息用于指示第二接入网设备广播SBB的条件，例如，该条件可以是第二接入网设备在接收到SN重配置完成消息时再开始广播SBB。又例如，该条件还可以是在接收到SgNB/SN增加请求经过设定时长后再开始广播SBB。这种实现方式下，第二接入网设备不会在接收到SgNB/SN增加请求时立即广播SBB，因此这种实现方式可以适用于终端不需要在MN确定为该终端添加SN时立即监听SN的SBB。例如这种实现方式可以适用于对终端进行SN预配置的场景。SN预配置是指对终端执行SN的RRC配置过程，但是终端不需要接入SN，即终端不需要与SN执行随机接入过程。
S503、第二接入网设备向第一接入网设备发送SgNB/SN增加请求确认消息(SgNB addition request acknowledge)。第一接入网设备从第二接入网设备接收SgNB/SN增加请求确认消息。
如果第二接入网设备在S502之后已经广播SBB，那么，可选的在该SgNB/SN增加请求确认消息中可以携带第二接入网设备广播SBB的广播周期，记为广播周期2。如果S502中第二接入网设备收到了广播周期1，广播周期2可以与广播周期1相同或不同。即第二接入网设备可以在接收到广播周期1的情况下，不按照广播周期1广播SBB，而是自行决定SBB的广播周期2，并将广播周期2通知给第一接入网设备。
S504、第一接入网设备向终端发送RRC重配置(RRC connection reconfiguration)消息。终端从第一接入网设备接收该RRC重配置消息。
可选的，该RRC重配置消息包括第二接入网设备广播SBB的广播周期。例如，若第一接入网设备没有收到第二接入网设备通知的广播周期2，则该RRC重配置消息中包括的广播周期可以是广播周期1；若第一接入网设备收到第二接入网设备通知的广播周期2，则该RRC重配置消息中包括的广播周期可以是广播周期2。
若SBB的广播周期默认采用20ms，第二接入网设备可以以更短的周期广播SBB，例如以5ms的广播周期广播SBB，这样能够使得终端更快的接入第二接入网设备。或者，第二接入网设备可以以更长的周期广播SBB，例如以160ms的周期广播SBB，这样能够更加节省第二接入网设备的能耗。第二接入网设备通知第一接入网设备SBB的广播周期，并且由第一接入网设备将第二接入网设备广播SBB的周期通知给终端，终端能够获知第二接入网设备广播SBB的广播周期。这样可以避免终端按照默认的广播周期搜索SBB，因搜索不到而选择其他的网络接入。举例来说，终端按照默认的20ms的广播周期来搜索SBB，而实际上第二接入网设备广播SBB的周期为160ms，终端在20ms内没有搜索到SBB可能会选择其他网络接入，导致接入该第二接入网设备失败。通过告知终端第二接入网设备广播SBB的广播周期，可以避免这个问题，使得终端更准确的接入第二接入网设备。
S505、终端向第一接入网设备发送RRC重配置完成消息(RRC connection reconfiguration complete)，第一接入网设备接收来自终端的RRC重配置完成消息。
S506、第一接入网设备向第二接入网设备发送SN重配置完成(SgNB reconfiguration complete)消息。第二接入网设备接收来自第一接入网设备的SN重配置完成消息。
若在S502的SgNB/SN增加请求消息中没有携带第一指示信息，即第一接入网设备没有指示第二接入网设备广播SBB，则该SN重配置完成消息中可以包括第一指示信息，用于指示第二接入网设备广播SBB。也就是说，图4所示的实施例中，第一接入网设备向第二接入网设备发送的第一消息，可能是S502的SgNB/SN增加请求消息，也可能是S506的SN重配置完成消息。当第一消息是S506的SN重配置完成消息时，可以适用于如上面S502中描述的SN预配置的场景，这样可以进一步地降低SN广播SBB的功耗，也就能够节省双连接架构或多连接架构整个系统的功耗。
若在S502中携带第一指示信息，则在S506之后，还可以执行S507～S508。
S507、终端通过随机接入过程(random access procedure)接入第二接入网设备，在接入后第二接入网设备就可以作为双连接架构或多连接架构中的SN，为终端提供服务。
S508、第二接入网设备停止广播SBB。
在终端接入第二接入网设备之后，第二接入网设备可以停止广播SBB。实际应用中，可能有第一接入网设备为多个终端请求添加第二接入网设备为SN，则第二接入网设备可以根据多个终端的接入状态，决定是否停止广播SBB。还可能第二接入网设备在接收到第一接入网设备指示停止广播SBB的消息后，停止广播SBB。具体第二接入网设备停止广播SBB相关方案细节，可以参照图4所示实施例的描述。通过第二接入网设备及时地停止广播SBB，能够节省第二接入网设备的功耗。
S509、第二接入网设备向第一接入网设备发送gNB配置更新(gNB configuration update)消息。
可选的，该消息可以携带指示信息，记为第三指示信息。该第三指示信息用于指示SN决定停止或者已经停止广播SBB。
可以理解，图5所示实施例和图4所示实施例的描述可以相互参见和补充。
基于上述实施例的描述，图6示出了本申请实施例提供的一种通信方法。如图6所示，在第一接入网设备确定请求第二接入网设备为终端分配资源之前，还可能包括以下步骤。
S601、第一接入网设备向终端发送第四消息，终端接收来自第一接入网设备的第四消息。
第四消息可以包括一个门限，记为第一门限；或者第四消息用于指示终端的上报条件，例如该上报条件包括终端在测量的第一接入网设备的下行信号强度大于或等于第一门限时触发上报。
可选的，第四消息可能是广播消息。广播消息中包括触发事件信息。该触发事件信息用于指示第一门限，或该触发事件信息用于指示终端的上报条件，例如，该上报条件包括终端测量第一接入网设备的下行信号强度大于或者等于第一门限时触发上报。
可选的，第四消息中也可能包括测量配置信息，这种情况下，该第四消息可以是RRC消息，例如，RRC重配置消息。测量配置信息中可以用于指示第一门限；或该测量配置信息用于指示终端的上报条件，上报条件可以包括终端测量第一接入网设备的下行信号强度大于或者等于第一门限时触发上报。
其中，本申请实施例中，下行信号强度可以是下行信号功率或者信噪比。
S602、终端向第一接入网设备发送第五消息，第一接入网设备接收来自终端的第五消息。
第五消息可以包括终端测量的第一接入网设备的下行信号强度；或者，第五消息可以用于指示终端测量的第一接入网设备的下行信号强度大于或等于第一门限。
终端在接收到来自第一接入网设备的第四消息时，根据第四消息中包括的第一门限或上述上报条件，判断测量的第一接入网设备的下行信号强度是否大于或等于第一门限，若是，则表明满足上报条件，则终端触发上报第五消息。
若第四消息是广播消息，则第五消息可以是RRC消息；若第四消息中包括的是测量配置信息，则第五消息可以是测量报告。
可以理解的是，第四消息中包括第一门限时，第五消息可以包括终端测量的第一接入网设备的下行信号强度；第四消息中包括第一门限时，第五消息也可以用于指示终端测量的第一接入网设备的下行信号强度大于或等于第一门限。第四消息用于指示终端的上报条件时，第五消息可以包括终端测量的第一接入网设备的下行信号强度；第四消息用于指示终端的上报条件时，第五消息也可以用于指示终端测量的第一接入网设备的下行信号强度大于或等于第一门限。
在S602之后，可以执行上述图4所示实施例中的S400，即第一接入网设备确定请求第二接入网设备为终端分配资源。第一接入网设备根据第五消息中包括的终端测量的第一接入网设备的下行信号强度，可以判断终端测量的第一接入网设备的下行信号强度是否大于或等于第一门限，若是，则确定请求第二接入网设备为终端分配资源。或者，若第五消息用于指示终端测量的第一接入网设备的下行信号强度大于或等于第一门限，则第一接入网设备根据第五消息确定请求第二接入网设备为终端分配资源。
第一接入网设备在根据第五消息确定请求第二接入网设备为终端分配资源时，可以通过以下方式实现。第一接入网设备可以获取第一接入网设备的下行信号强度与第二接入网设备的下行信号强度的关系(简称：信号关系)。例如，终端接收来自第一接入网设备的 下行信号强度(或信号强度范围)为A时，终端接收来自第二接入网设备的下行信号强度(或信号强度范围)为B，A与B之间具有一定的关系。第一接入网设备可以从核心网设备或操作维护管理(operation administration and maintenance，OAM)设备获取该信号关系。第一接入网设备也可以基于历史测量的信息来获取该信号关系。
第一接入网设备接收来自终端的第五消息时，可以根据该信号关系，确定终端应接收第二接入网设备的下行信号强度。进一步地，第一接入网设备根据确定的终端应接收第二接入网设备的下行信号强度，确定可以请求第二接入网设备为终端分配资源。
在另一种实现方式中，第一接入网设备不需要根据该信号关系来做进一步的判断，而是在设置第一门限时已考虑了该信号关系。即，一旦第一接入网设备接收到第五消息，就可以确定可以请求第二接入网设备为终端分配资源。
图7示出了本申请实施例提供的另一种通信方法。如图7所示，第三接入网设备作为辅接入网设备为终端提供服务。第一接入网设备作为主接入网设备为终端提供服务。图7所示的实施例描述了终端的辅接入网设备需要从第三接入网设备切换为第二接入网设备的应用场景。在这种场景下，S400中第一接入网设备确定请求第二接入网设备为终端分配资源，可以理解为，第一接入网设备确定将终端的辅接入网设备从第三接入网设备切换为第二接入网设备。
具体地，在第一接入网设备确定请求第二接入网设备为终端分配资源之前，还可能包括以下步骤。
S701、第三接入网设备向第二接入网设备发送上行测量配置，第二接入网设备接收来自第三接入网设备的该上行测量配置。
该上行测量配置中可以包括上行测量信号的资源的信息，该上行测量配置可以用于通知第二接入网设备接收终端的上行测量信号。第二接入网设备收到该上行测量配置以后，就可以在该上行测量配置指示的资源上接收终端发送的上行测量信号，从而判断终端是否移动到了自己的服务范围。可选的，该上行测量配置中还可以包括第二门限或事件触发信息。该第二门限或事件触发信息可以用于指示第二接入网设备在满足一定的条件后执行S704，即向第三接入网设备发送上行测量报告。例如第二接入网设备接收的来自终端的上行测量信号强度大于第二门限时向第三接入网设备发送上行测量报告。上行测量信号强度可以是上行测量信号功率或信噪比。
该上行测量配置中还可以包括终端的标识。上行测量信号可以是SRS。
上行测量配置可以携带在X2AP/XnAP消息中，X2AP消息是指通过X2接口传输的应用层(application)消息，XnAP消息是指通过Xn接口传输的应用层消息。
S702、第三接入网设备向终端发送上行测量配置，终端接收该上行测量配置。
第三接入网设备可以先向第一接入网设备发送该上行测量配置，由第一接入网设备向终端转发该上行测量配置。该上行测量配置中可以包括发送上行测量信号的资源的信息。
通过第三接入网设备向终端发送该上行测量配置，终端能够确定发送上行测量信号的资源的信息。终端可以在该上行测量配置所指示的资源上发送上行测量信号。
S701和S702没有严格的执行顺序，可以同时进行或交换顺序执行。
S703、终端发送上行测量信号。
第二接入网设备可以接收来自终端的上行测量信号，第三接入网设备也可能接收来自终端的上行测量信号。
S704、第二接入网设备向第三接入网设备发送上行测量报告，第三接入网设备接收来自第二接入网设备的该上行测量报告。
第二接入网设备根据上行测量配置中的第二门限或事件触发信息，在满足第二门限或事件触发信息所指示的条件时，向第三接入网设备发送上行测量报告。上行测量报告可以包括第二接入网设备从终端接收的上行测量信号强度大于第二门限的信息。该上行测量报告可以承载在X2AP/XnAP消息中。该上行测量报告可以包括指示信息，用于指示第二接入网设备从终端接收的上行测量信号强度大于或等于第二门限。或者该上行测量报告包括第二接入网设备从终端接收的上行测量信号的强度值。
上行测量报告可以是小区级别的，可以针对一个小区或多个小区。如果上行测量报告是小区级别的，则上行测量报告还可以携带小区的标识，表征该小区的标识所指示的小区的上行测量信号强度大于第二门限。
S705、第三接入网设备进行切换决策，决定终端的辅接入网设备需要从第三接入网设备切换到第二接入网设备。
无论第三接入网设备是否接收到终端发送的上行测量信号，第三接入网设备可以根据第二接入网设备发送的上行测量报告，进行切换决策。例如第三接入网设备根据上行测量报告确定第二接入网设备接收来自终端的上行测量信号强度高于第二门限，则决定进行切换。
若第三接入网设备接收到终端发送的上行测量信号，则第三接入网设备还可以结合第二接入网设备发送的上行测量报告与自身接收到的来自终端的上行测量信号，进行切换决策。例如，第三接入网设备将自身接收到的来自终端的上行测量信号、与S704接收来自第二接入网设备的上行测量报告中第二接入网设备从终端接收的上行测量信号进行比较，若上行测量报告中第二接入网设备从终端接收的上行测量信号大于或等于第三接入网设备接收到来自终端的上行测量信号，那么第三接入网设备决定切换事件。或者，若上行测量报告中第二接入网设备从终端接收的上行测量信号与第三接入网设备接收到来自终端的上行测量信号的差值大于设定阈值，则第三接入网设备决定切换事件。
S706、第三接入网设备向第一接入网设备发送第六消息，第一接入网设备从第三接入网设备接收该第六消息。
该第六消息用于指示终端的辅助接入网设备需要从第三接入网设备切换到第二接入网设备。
例如该请求消息为SN变化请求(SN change required)消息。
该请求消息中包括第二接入网设备的标识，如果是小区粒度的切换指示，可以包括第二接入网设备的小区的标识。
在S706之后，则第一接入网设备确定将终端的辅接入网设备从第三接入网设备切换为第二接入网设备。
或者，在S706之后，则执行上述图4所示实施例中的S400，或者图5所示实施例中的S501，即第一接入网设备确定请求第二接入网设备为终端分配资源。
基于上述实施例的描述，图8示出了本申请实施例提供的另一种通信方法。如图8所示，第三接入网设备作为辅接入网设备为终端提供服务。第一接入网设备作为主接入网设备为终端提供服务。图8所示的实施例描述了终端的辅接入网设备需要从第三接入网设备切换为第二接入网设备的应用场景。在这种场景下，S400中第一接入网设备确定请求第二 接入网设备为终端分配资源，可以理解为，第一接入网设备确定将终端的辅接入网设备从第三接入网设备切换为第二接入网设备。
具体地，第一接入网设备确定请求第二接入网设备为终端分配资源，可以通过以下方式实现。
S801、第一接入网设备分别向第二接入网设备和第二接入网设备发送上行测量配置，第二接入网设备和第三接入网设备分别接收来自第一接入网设备的该上行测量配置。
该上行测量配置中可以包括上行测量信号的资源的信息，该上行测量配置可以用于通知第二接入网设备和第三接入网设备接收终端的上行测量信号。第二接入网设备和第三接入网设备收到该上行测量配置以后，就可以在该上行测量配置指示的资源上接收终端发送的上行测量信号。可选的，该上行测量配置中还可以包括第二门限或事件触发信息。该第二门限或事件触发信息可以用于指示第二接入网设备或第三接入网设备在满足一定的条件后，向第一接入网设备发送上行测量报告。例如第二接入网设备或第三接入网设备接收的来自终端的上行测量信号强度大于第二门限时向第三接入网设备发送上行测量报告。其中，第一接入网设备向第二接入网设备和第三接入网设备发送的上行测量配置中的门限可以相同或不同。若不同，则第二接入网设备和第三接入网设备分别按照所接收到的门限值判断是否满足上报条件，在满足上报条件时向第一接入网设备发送上行测量报告。
S802、第一接入网设备向终端发送上行测量配置，终端接收该上行测量配置。
该上行测量配置中可以包括发送上行测量信号的资源的信息。终端能够根据该上行测量配置确定发送上行测量信号的资源的信息。终端可以在该上行测量配置所指示的资源上发送上行测量信号。
S801和S802没有严格的执行顺序，可以同时进行或交换顺序执行。
S803、终端发送上行测量信号。
第一接入网设备、第二接入网设备和第三接入网设备都可能接收来自终端的上行测量信号。
S804、第二接入网设备/第三接入网设备向第一接入网设备发送上行测量报告，第一接入网设备接收来自第二接入网设备/第三接入网设备的上行测量报告。
本步骤可以参考S704的描述，第三接入网设备向第一接入网设备发送上行测量报告的方法也可以参照第二接入网设备向第一接入网设备发送上行测量报告的方法，在此不再赘述。
S805、第一接入网设备进行切换决策，决定终端的辅接入网设备需要从第三接入网设备切换到第二接入网设备。即第一接入网设备确定请求第二接入网设备为终端分配资源。
第一接入网设备进行切换决策的方法，可以参照S705中第三接入网设备进行切换决策的方法。即可以根据接收的上行测量报告直接进行切换决策，也可以根据自身接收的上行测量信号和上行测量报告中的上行测量信号进行比较，来进行切换决策。具体方法可以参照S705的描述细节，在此不再赘述。
基于上述实施例的描述，图9示出了本申请实施例提供的另一种SBB的广播方法。如图9所示，该方法包括以下步骤。
S901、第一接入网设备向终端发送广播消息，终端接收来自第一接入网设备的广播消息。
广播消息中包括触发事件信息，该触发事件信息用于指示第三门限，或该触发事件信 息用于指示终端的上报条件，例如，该上报条件包括终端测量第一接入网设备的下行信号强度大于或者等于第三门限时触发上报。
S902、终端向第一接入网设备发送消息，例如可以是RRC消息，第一接入网设备接收来自终端的该RRC消息。
该RRC消息可以包括终端测量的第一接入网设备的下行信号强度，或者，该RRC消息可以用于指示终端测量的第一接入网设备的下行信号强度大于或等于第三门限。第三门限可以与上文的第一门限相同。
S903、第一接入网设备向第二接入网设备发送第一消息，第二接入网设备接收来自第一接入网设备的第一消息。第一消息指示第二接入网设备广播SBB。
步骤S903具体可以参考S401的步骤。
具体来说，第一接入网设备根据终端上报的RRC消息，初步确定可以请求第二接入网设备为终端分配资源，则第一接入网设备向第二接入网设备发送第一消息，指示第二接入网设备广播SBB。
S904、第二接入网设备根据第一消息广播SBB。
S905、第一接入网设备向终端发送测量配置信息，终端接收来自第一接入网设备的测量配置信息。该测量配置信息用于通知终端测量第二接入网设备的下行信号，例如该下行信号可以是SBB。
测量配置信息可以包括第四门限；或者测量配置信息用于指示终端的上报条件，例如该上报条件包括终端在测量的第二接入网设备的下行信号强度大于或等于第四门限时触发上报。
终端根据测量配置信息测量第二接入网设备的下行信号。
S906、终端向第一接入网设备发送测量报告，第一接入网设备接收来自终端的测量报告。
终端根据测量的第二接入网设备广播的SBB，在满足上报条件时触发上报。
第一接入网设备可以根据终端发送的测量报告，更精确的判断第二接入网设备是否适合为终端分配资源。若是，则维持第二接入网设备广播SBB的状态，否则指示第二接入网设备停止广播SBB。
通过图9所示实施例的方法，第一接入网设备可以更准确地判断是否适合请求第二接入网设备为终端分配资源。若适合，第二接入网设备维持广播SBB，方便终端进行接入。在不适合时，第一接入网设备通知第二接入网设备停止广播SBB，以节省第二接入网设备广播SBB的能耗。
基于上述实施例的描述，图10示出了本申请实施例提供的另一种SBB的广播方法。如图10所示，该方法包括以下步骤。本实施例可以应用于双连接架构或多连接架构的应用场景，第一接入网设备为主接入网设备，第二接入网设备为即将为终端服务的接入网设备。也可以应用与切换的应用场景，第一接入网设备为源接入网设备，第二接入网设备为目标接入网设备。
S1001、第一接入网设备向第二接入网设备发送SRS请求消息，第二接入网设备接收来自第一接入网设备的该SRS请求消息。
该SRS请求消息用于请求第二接入网设备为一个或多个终端分配SRS资源。
可选的，该SRS请求消息还可以包括终端的标识，用于指示为标识对应的终端分配 SRS资源。若该SRS请求消息中没有携带终端的标识，则该SRS请求消息用于请求第二接入网设备所分配的SRS资源可以给多个终端共享。
实际应用中，在没有终端初始接入第二网络设备的场景下或者没有终端需要与第二网络设备进行下行同步的时候，第二接入网设备可以关闭SBB的广播。这样能够节省第二接入网设备的能耗。
S1002、第二接入网设备向第一接入网设备发送SRS请求回复消息，第一接入网设备接收来自第二接入网设备的该SRS请求回复消息。
该SRS请求回复消息包括第二接入网设备为一个或多个终端分配的SRS资源。
S1001和S1002可以通过Xn/X2接口建立的过程实现。例如SRS请求消息可以是Xn/X2接口建立请求消息，SRS请求回复消息可以是Xn/X2接口建立请求回复消息。
S1003、第一接入网设备向终端发送RRC消息，终端接收第一接入网设备发送的RRC消息。
例如RRC消息为RRC重配置消息。
该RRC消息包括第二接入网设备分配的SRS资源，该SRS资源用于终端发送SRS。
S1004、第一接入网设备向第二接入网设备发送第一消息。第二接入网设备接收来自第一接入网设备的第一消息。该第一消息用于指示第二接入网设备广播SBB。该步骤具体可以参考S401。
S1004与S1003的执行顺序不作限定，可以同时进行，也可以交换顺序执行。
可选的，S1001中的SRS请求消息的功能可以具有第一消息的功能，即SRS请求消息可以用于指示第二接入网设备广播SBB，这种情况下S1004可以省略。
S1005、第二接入网设备广播SBB。终端接收第二接入网设备广播的SBB。
S1006、终端基于第二接入网设备广播的公共控制信息进行下行同步。
S1007、终端向第二接入网设备发送上行SRS，第二接入网设备接收来自终端的上行SRS。
在S1007之后，还可以执行S1008～S1010，或者在S1007之后还可以执行S1011，以实现第二接入网设备停止广播SBB的过程。S1008～S1010和S1011任选其一执行，即执行S1008～S1010，不执行S1011；或者，执行S1011，不执行S1008～S1010。
S1008、第二接入网设备向第一接入网设备发送消息，第一接入网设备接收来自第二接入网设备的该消息。
该消息可以是SRS通知消息或其他名称的消息。该消息用于向第一接入网设备通知该第二接入网设备已经接收到终端发送的上行SRS。可选的，该消息可以包括终端的标识和/或SRS的配置。第一接入网设备可以通过终端的标识确定第二接入网设备接收到了哪些终端的上行SRS，从而第一接入网设备可以进一步判断是否指示第二接入网设备停止广播下行SBB。
本步骤可以作为图4实施例中S404的一种可能的实现方式。
S1009、第一接入网设备向第二接入网设备发送消息；第二接入网设备接收来自第一接入网设备的该消息。该消息用于指示第二接入网设备停止广播SBB。
本步骤可以作为图4实施例中S403的一种可能的实现方式。
S1010、第二接入网设备向第一接入网设备发送S1009中消息的响应消息，第一接入网设备接收第二接入网设备发送的该响应消息。
该响应消息用于向第一接入网设备通知该第二接入网设备已经停止广播下行SBB。
本步骤为可选的，也可以不执行。
S1011、第二接入网设备向第一接入网设备发送消息，该消息用于指示第二接入网设备决定停止广播下行SBB。第一接入网设备接收第二接入网设备发送的该消息。
第二接入网设备检测到终端发送的上行SRS后决定停止广播下行SBB。
本步骤可以作为图4实施例中S406的一种可能的实现方式。
在图10所示的本实施例中，一种可能的应用场景是：第一接入网设备和第二接入网设备可以是双连接或多连接架构的两个设备，第一接入网设备为主接入网设备，第二接入网设备为辅接入网设备。第一接入网设备在确定第二接入网设备为终端分配资源时，向第二接入网设备指示开始广播SBB，指示开始广播SBB的功能可以通过S1001或S1004来实现。另一种可能的应用场景是：第一接入网设备为源接入网设备、第二接入网设备为目标接入网设备。在S1007之后，第二接入网设备根据接收到的终端的上行SRS，可以判断终端是否处于该第二接入网设备的服务范围内。若是，则第二接入网设备确定终端可以由第一接入网设备切换到第二接入网设备。在S1008第二接入网设备向第一接入网设备发送的消息，可以用于指示第一接入网设备执行切换，即将该终端从第一接入网设备切换到第二接入网设备。
图11示出了本申请实施例提供的另一种SBB的广播方法。该方法包括如下步骤：
S1101、第一接入网设备向第二接入网设备发送消息，该消息中携带第二接入网设备广播SBB的广播周期，第二接入网设备接收第一接入网设备发送的该消息。
当然，第二接入网设备广播SBB的广播周期也可能由第二接入网设备自己确定。这种情况下，该方法可以不包括步骤S1101，而包括步骤S1102。
可选地，在S1101之前，还可以包括步骤S1100。步骤S1100可以参考步骤S400的介绍，不再赘述。
S1102、第二接入网设备确定广播SBB的广播周期，并向第一接入网设备发送消息，该消息中携带该第二接入网设备确定的广播周期。第一接入网设备接收第二接入网设备发送的该消息。
示例的，S1101和S1102中所述的消息可以作如下解释。该消息可以指示第二接入网设备下的一个或多个小区广播SBB的广播周期。例如该消息中携带一个或多个小区的标识，用于指示该一个或多个小区广播SBB的广播周期。该消息的名称没有限制。例如，该消息可以是RAN配置更新消息。
S1101和S1102可以选择其中一个步骤执行。在S1101或者在S1102之后，可以执行S1103。
S1103、第一接入网设备向终端发送消息，终端接收第一接入网设备发送的消息。该消息中携带第二接入网设备广播SBB的广播周期的信息。
S1104、终端按照该广播周期接收来自第二接入网设备的SBB。
例如，第一接入网设备向终端发送RRC重配置消息，该RRC重配置消息中携带广播周期。终端接收来自第一接入网设备的RRC重配置消息，按照该RRC重配置消息中携带的广播周期接收来自第二接入网设备的SBB，并向第一接入网设备发送RRC重配置完成消息。可以理解的是，在S1102的基础上，第一接入网设备向终端发送的广播周期信息可以是第二接入网设备发送给第一接入网设备，第一接入网设备再发送(例如，透传)给终 端设备的。除了通过RRC消息告知终端第二接入网设备的SBB广播周期，第一接入网设备还可以在广播消息中告知终端第二接入网设备的SBB广播周期，例如第一接入网设备在SIB10中告知终端第二接入网设备的SBB广播周期。
上述各个步骤所述的广播周期可以是小区粒度的，例如，针对第二接入网设备下的一个或多个小区设置广播周期，第一接入网设备向第二接入网设备发送广播周期时，携带小区标识，指示小区对应的广播周期。或者，第二接入网设备向第一接入网设备发送广播周期时，携带小区标识，指示小区对应的广播周期。
在步骤S1101或S1102之前，如果第二接入网设备没有在广播SBB，则在S1101或S1102后，可以按照步骤S1101或S1102中的消息所指示的广播周期广播SBB。如果在步骤S1101或S1102之前，第二接入网设备以第一广播周期在广播SBB，在步骤S1101或S1102后，则按照步骤S1101或S1102中的消息所指示的广播周期广播SBB。为描述方便，S1101中或S1102的广播周期可以称为第二广播周期。
可选的，S1101和S1102中所述的第二广播周期小于第一广播周期。
例如，第一广播周期为160ms，以较长的160ms的广播周期来广播SBB，能够节省第二接入网设备的能耗。当第一接入网设备确定请求第二接入网设备为终端分配资源时，第一接入网设备可以进行步骤S1101和S1103。通过步骤S1101，可以通知第二接入网设备的广播周期调整为第二广播周期。第二广播周期可以为小于160ms的周期，例如20ms。通过步骤S1103，可以使终端获取第二广播周期。第二接入网设备将广播周期缩短，可以使终端更快的接入第二接入网设备。待终端接入第二接入网设备后，第一接入网设备可以通知第二接入网设备将广播周期调长并相应通知终端，例如可以调回第一广播周期，从而节省第二接入网设备的能耗。通过第一接入网设备向第二接入网设备指示上述广播周期或者第二接入网设备向第一接入网设备指示上述广播周期，第一接入网设备将广播周期发送给终端，使得终端可以获得第二接入网设备的广播周期。按照第二接入网设备的广播周期接收SBB。通过增大第二接入网设备广播SBB的周期，可以进一步节省能耗。通过减小第二接入网设备广播SBB的周期，可以加快终端接入第二接入网设备的速度。通过将广播周期发送给终端，避免终端按照小于第二接入网设备广播周期的周期搜索SBB时，SBB因搜索不到SBB而选择其他的网络接入，有助于终端正常接入第二接入网设备。
本申请实施例所述的各个消息(例如第一消息、第二消息、第三消息、第四消息、第五消息或第六消息)可以复用现有协议的消息，具体复用现有协议的消息名称可以是上述对各个消息举例的消息名称，也可以是其它消息名称。各消息也可以是新定义的消息，新定义的消息的名称不作限定。例如，第一消息可以为SBB触发请求消息，第二消息可以为SBB广播停止消息，第三消息可以是接入报告(access reporting)。
需要说明的是，本申请中的各个应用场景中的举例仅仅表现了一些可能的实现方式，是为了对本申请的方法更好的理解和说明。本领域技术人员可以根据本申请提供的SBB的广播方法，得到一些演变形式的举例。
上述本申请提供的实施例中，分别从第一接入网设备、第二接入网设备、第三接入网设备、终端、以及各个设备之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，第一接入网设备、第二接入网设备、第三接入网设备和终端设备可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模 块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
如图12所示，本申请实施例还提供了一种装置1200，该装置1200可以是终端设备或接入网设备，接入网设备包括第一接入网设备、第二接入网设备或第三接入网设备。也可以是终端设备或接入网设备中的装置，或者是能够和终端设备或接入网设备匹配使用的装置。一种设计中，该装置1200可以包括执行上述方法实施例中终端设备或接入网设备执行的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该装置可以包括处理模块1201和通信模块1202。处理模块1201用于调用通信模块1202执行接收和/或发送的功能。
当用于执行第一接入网设备执行的方法时：
处理模块1201，用于确定请求第二接入网设备为终端分配资源；
通信模块1202，用于向第二接入网设备发送第一消息，第一消息用于指示第二接入网设备广播SBB。
可选的，处理模块1201和通信模块1202还可以用于执行上述第一接入网设备执行的其它步骤，在此不再赘述。例如，处理模块1201调用通信模块1202执行上述图4～图11各个实施例中第一接入网设备所执行的收发操作。处理模块1201还用于执行上述图4～图11各个实施例中第一接入网设备除收发操作之外的操作。
当用于执行第二接入网设备执行的方法时：
通信模块1202，用于接收来自第一接入网设备的第一消息，第一消息用于指示所述第二接入网设备广播SBB；
处理模块1201，用于根据第一消息调用通信模块1202广播SBB。
可选的，处理模块1201和通信模块1202还用于还可以用于执行上述第二接入网设备执行的其它步骤，在此不再赘述。例如，处理模块1201调用通信模块1202执行上述图4、图5、图7～图11各个实施例中第二接入网设备所执行的收发操作，处理模块1201还用于执行上述图4、图5、图7～图11各个实施例中第二接入网设备除收发操作之外的操作。
当执行终端执行的方法时：通信模块1202，用于接收来自第一接入网设备的广播周期的信息，该广播周期为第二接入网设备广播SBB的周期；以及用于根据所述广播周期接收来自所述第二接入网设备的SBB。
处理模块1201和通信模块1202还可以用于执行上述方法实施例终端执行的其它对应的步骤或操作，在此不再一一赘述。例如，处理模块1201调用通信模块1202执行上述图5～图11各个实施例中终端所执行的收发操作。处理模块1201还用于执行上述图5～图11各个实施例中终端除收发操作之外的操作。
本申请实施例中对模块的划分是示意性的，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，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
如图13所示为本申请实施例提供的装置1300，用于实现上述方法中终端设备或接入网设备的功能。接入网设备包括第一接入网设备、第二接入网设备和第三接入网设备。当实现接入网设备的功能时，该装置可以是接入网设备，也可以是接入网设备中的装置,或者是能够和接入网设备匹配使用的装置。当实现终端设备的功能时，该装置可以是终端设备，也可以是终端设备中的装置,或者是能够和终端设备匹配使用的装置。其中，该装置 可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。装置1300包括至少一个处理器1320，用于实现本申请实施例提供的方法中终端设备或接入网设备的功能。装置1300还可以包括通信接口1310。在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，用于通过传输介质和其它设备进行通信。例如，通信接口1310用于装置1300中的装置可以和其它设备进行通信。示例性地，装置1300是第一接入网设备时，该其它设备可以是第二接入网设备或终端设备。装置1300是第二接入网设备时，该其它设备可以是第一接入网设备、第三接入网设备或终端设备。装置1300是第三接入网设备时，该其它设备可以是第二接入网设备、第一接入网设备或终端。装置1300是终端时，该其它设备可以是第一接入网设备、第二接入网设备或第三接入网设备。处理器1320利用通信接口1310收发数据，并用于实现上述方法实施例所述的方法。
示例性地，当实现第一接入网设备的功能时，处理器1320用于确定请求第二接入网设备为终端分配资源；通信接口1310，用于向第二接入网设备发送第一消息，第一消息用于指示第二接入网设备广播SBB。处理器1320和通信接口1310还可以用于执行上述第一接入网设备执行的其它步骤，在此不再赘述。例如，处理器1320调用通信接口1310执行上述图4～图11各个实施例中第一接入网设备所执行的收发操作。处理器1320还用于执行上述图4～图11各个实施例中第一接入网设备除收发操作之外的操作。
当实现第二接入网设备的功能时，通信接口1310，用于接收来自第一接入网设备的第一消息，第一消息用于指示所述第二接入网设备广播SBB；处理器1320，用于根据第一消息调用通信接口1310广播SBB。处理器1320和通信接口1310还可以用于执行上述第二接入网设备执行的其它步骤，在此不再赘述。例如，处理器1320调用通信接口1310执行上述图4、图5、图7～图11各个实施例中第二接入网设备所执行的收发操作。处理器1320还用于执行上述图4、图5、图7～图11各个实施例中第二接入网设备除收发操作之外的操作。
当实现第三接入网设备的功能时，处理器1320和通信接口1310可以用于执行上述方法实施例中第三接入网设备执行的步骤，在此不再赘述。例如，处理器1320调用通信接口1310执行上述图7或图8各个实施例中第三接入网设备所执行的收发操作。处理器1320还用于执行上述图7或图8各个实施例中第三接入网设备除收发操作之外的操作。
当实现终端的功能时，处理器1320，用于通过通信接口1310接收收来自第一接入网设备的广播周期的信息，该广播周期为第二接入网设备广播SBB的周期；以及用于根据所述广播周期接收来自所述第二接入网设备的SBB。处理器1320和通信接口1310还可以用于执行上述方法实施例终端执行的其它对应的步骤或操作，在此不再一一赘述。当执行终端执行的方法时，处理器1320和通信接口1310还可以用于执行上述终端执行的其它步骤，在此不再赘述。例如，处理器1320调用通信接口1310执行上述图5～图11各个实施例中终端所执行的收发操作。处理器1320还用于执行上述图5～图11各个实施例中终端除收发操作之外的操作。
装置1300还可以包括至少一个存储器1330，用于存储程序指令和/或数据。存储器1330和处理器1320耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器1320可能和存储器1330协同操作。处理器1320可能执行存储器1330中存储的程序指令。 所述至少一个存储器中的至少一个可以包括于处理器中。
本申请实施例中不限定上述通信接口1310、处理器1320以及存储器1330之间的具体连接介质。本申请实施例在图13中以存储器1330、通信接口1320以及通信接口1310之间通过总线1340连接，总线在图13中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图13中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
装置1200和装置1300具体是芯片或者芯片系统时，通信模块1202和通信接口1310所输出或接收的可以是基带信号。装置1200和装置1300具体是设备时，通信模块1202和通信接口1310所输出或接收的可以是射频信号。在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
本申请实施例提供了一种计算机可读存储介质，存储有计算机可读指令，当计算机可读指令在通信装置上运行时，使得通信装置执行上述方法实施例。
本申请实施例提供了一种包含指令的计算机程序产品，当计算机程序产品在通信装置上运行时，使得通信装置执行上述方法实施例。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样，倘若本申请实施例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，则本申请也意图包含这些改动和变型在内。

Claims (33)

  1. 一种同步信号/广播信号块SSB的广播方法，其特征在于，包括：
    第一接入网设备确定请求第二接入网设备为终端分配资源；
    所述第一接入网设备向所述第二接入网设备发送第一消息，所述第一消息用于指示所述第二接入网设备广播SSB。
  2. 如权利要求1所述的方法，其特征在于，所述第一消息包括广播周期，所述广播周期为所述第二接入网设备广播所述SSB的周期。
  3. 如权利要求2所述的方法，其特征在于，所述方法还包括：
    所述第一接入网设备向所述终端发送所述广播周期。
  4. 如权利要求1～3任一项所述的方法，其特征在于，所述方法还包括：
    所述第一接入网设备向所述第二接入网设备发送第二消息，所述第二消息用于指示所述第二接入网设备停止广播SSB。
  5. 如权利要求4所述的方法，其特征在于，在第一接入网设备向所述第二接入网设备发送第二消息之前，所述方法还包括：
    所述第一接入网设备接收来自所述第二接入网设备的第三消息，所述第三消息用于指示：所述终端接入所述第二接入网设备的状态。
  6. 如权利要求1～5任一项所述的方法，其特征在于，所述第一接入网设备确定请求第二接入网设备为终端分配资源之前，所述方法还包括：
    所述第一接入网设备向终端发送第四消息，所述第四消息包括第一门限；或者，所述第四消息指示终端的上报条件，所述上报条件包括终端在测量的第一接入网设备的下行信号强度大于或等于第一门限时触发上报；
    所述第一接入网设备接收来自所述终端的第五消息，所述第五消息包括所述终端测量的所述第一接入网设备的下行信号强度；或者，所述第五消息用于指示所述终端测量的所述第一接入网设备的下行信号强度大于或等于所述第一门限。
  7. 如权利要求1～6任一项所述的方法，其特征在于，所述方法还包括：
    所述第一接入网设备向终端发送第六消息，所述第六消息包括第二门限；或者，所述第六消息指示终端的上报条件，所述上报条件包括终端在测量的第二接入网设备的下行信号强度大于或等于第二门限时触发上报；
    所述第一接入网设备接收来自所述终端的第七消息，所述第七消息包括所述终端测量的所述第二接入网设备的下行信号强度；或者，所述第五消息用于指示所述终端测量的所述第二接入网设备的下行信号强度大于或等于所述第二门限。
  8. 如权利要求1～5任一项所述的方法，其特征在于，所述第一接入网设备确定请求第二接入网设备为终端分配资源之前，所述方法还包括：
    所述第一网络设备接收来自第三网络设备的第八消息，所述第八消息用于指示所述终端的辅接入网设备需要从所述第三网络设备切换到所述第二网络设备，或者用于指示需要添加所述第二网络设备为所述终端的辅接入网设备。
  9. 一种同步信号/广播信号块SSB的广播方法，其特征在于，包括：
    第二接入网设备接收来自第一接入网设备第一消息，所述第一消息用于指示所述第二接入网设备广播SSB；
    所述第二接入网设备广播SSB。
  10. 如权利要求9所述的方法，其特征在于，所述第一消息包括广播周期，所述广播周期为所述第二接入网设备广播SSB的周期。
  11. 如权利要求9或10所述的方法，其特征在于，所述方法还包括：
    所述第二接入网设备停止广播SSB。
  12. 如权利要求11所述的方法，其特征在于，所述方法还包括：所述第二接入网设备接收来自所述第一接入网设备的第二消息，所述第二消息用于指示所述第二接入网设备停止广播SSB。
  13. 如权利要求9～12所述的方法，其特征在于，所述方法还包括：所述第二接入网设备向所述第一接入网设备发送第三消息，所述第三消息用于指示：所述终端接入所述第二接入网设备的状态。
  14. 一种同步信号/广播信号块SSB的广播方法，其特征在于，包括：
    终端接收来自第一接入网设备的包括广播周期的消息，所述广播周期为第二接入网设备广播SSB的周期；
    所述终端根据所述广播周期接收来自所述第二接入网设备的SSB。
  15. 如权利要求14所述的方法，其特征在于，所述广播周期包括所述第二接入网设备的一个或多个小区广播SSB的周期；
    所述终端根据所述广播周期接收来自第二接入网设备的SSB，包括：所述终端根据所述广播周期接收来自所述第二接入网设备的一个或多个小区的SSB。
  16. 一种通信装置，其特征在于，包括：
    处理模块，用于确定请求第二接入网设备为终端分配资源；
    通信模块，用于向所述第二接入网设备发送第一消息，所述第一消息用于指示所述第二接入网设备广播同步信号/广播信号块SSB。
  17. 如权利要求16所述的装置，其特征在于，所述第一消息包括广播周期，所述广播周期为所述第二接入网设备广播SSB的周期。
  18. 如权利要求17所述的装置，其特征在于，所述通信模块还用于：
    向所述终端发送所述广播周期。
  19. 如权利要求16～18任一项所述的装置，其特征在于，所述通信模块还用于：
    向所述第二接入网设备发送第二消息，所述第二消息用于指示所述第二接入网设备停止广播SSB。
  20. 如权利要求19所述的装置，其特征在于，所述通信模块还用于：
    在向所述第二接入网设备发送第二消息之前，接收来自所述第二接入网设备的第三消息，所述第三消息用于指示：所述终端接入所述第二接入网设备的状态。
  21. 如权利要求16～20任一项所述的装置，其特征在于，所述通信模块还用于：
    在所述处理模块确定请求第二接入网设备为终端分配资源之前，向终端发送第四消息，所述第四消息包括第一门限；或者，所述第四消息指示终端的上报条件，所述上报条件包括终端在测量的第一接入网设备的下行信号强度大于或等于第一门限时触发上报；
    接收来自所述终端的第五消息，所述第五消息包括所述终端测量的所述第一接入网设备的下行信号强度；或者，所述第五消息用于指示所述终端测量的所述第一接入网设备的下行信号强度大于或等于所述第一门限。
  22. 如权利要求16～21任一项所述的装置，其特征在于，所述通信模块还用于：
    向终端发送第六消息，所述第六消息包括第二门限；或者，所述第六消息指示终端的上报条件，所述上报条件包括终端在测量的第二接入网设备的下行信号强度大于或等于第二门限时触发上报；
    接收来自所述终端的第七消息，所述第七消息包括所述终端测量的所述第二接入网设备的下行信号强度；或者，所述第五消息用于指示所述终端测量的所述第二接入网设备的下行信号强度大于或等于所述第二门限。
  23. 如权利要求16～20任一项所述的装置，其特征在于，所述通信模块还用于：
    在所述处理模块确定请求第二接入网设备为终端分配资源之前，接收来自第三网络设备的第八消息，所述第八消息用于指示所述终端的辅接入网设备需要从所述第三网络设备切换到所述第二网络设备，或者用于指示需要添加所述第二网络设备为所述终端的辅接入网设备。
  24. 一种通信装置，其特征在于，包括：
    通信模块，用于接收来自第一接入网设备第一消息，所述第一消息用于指示所述第二接入网设备广播同步信号/广播信号块SBB；
    处理模块，用于广播SBB。
  25. 如权利要求24所述的装置，其特征在于，所述第一消息包括广播周期，所述广播周期为所述第二接入网设备广播SBB的周期。
  26. 如权利要求24或25所述的装置，其特征在于，所述处理模块还用于停止广播SBB。
  27. 如权利要求26所述的装置，其特征在于，所述通信模块还用于：收来自所述第一接入网设备的第二消息，所述第二消息用于指示所述第二接入网设备停止广播SBB。
  28. 如权利要求24～27任一项所述的装置，其特征在于，所述通信模块还用于：向所述第一接入网设备发送第三消息，所述第三消息用于指示：所述终端接入所述第二接入网设备的状态。
  29. 一种通信装置，其特征在于，包括：
    通信模块，用于接收来自第一接入网设备的包括广播周期的消息，所述广播周期为第二接入网设备广播同步信号/广播信号块SBB的周期；
    所述通信模块，还用于根据所述广播周期接收来自所述第二接入网设备的SBB。
  30. 如权利要求29所述的装置，其特征在于，所述广播周期包括所述第二接入网设备的一个或多个小区广播SBB的周期；
    所述通信模块用于根据所述广播周期接收来自所述第二接入网设备的一个或多个小区的SBB。
  31. 一种通信装置，其特征在于，包括处理器和通信接口，所述通信接口用于与其它通信装置进行通信；所述处理器用于运行一组程序，以使得所述通信装置以实现权利要求1至13任一项所述的方法。
  32. 一种通信装置，其特征在于，包括处理器和通信接口，所述通信接口用于与其它通信装置进行通信；所述处理器用于运行一组程序，以使得所述通信装置以实现权利要求14或15所述的方法。
  33. 一种计算机可读存储介质，其特征在于，所述计算机存储介质中存储有计算机可读指令，当所述计算机可读指令在通信装置上运行时，使得所述通信装置执行权利要求1至15任一项所述的方法。
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