WO2023098616A1 - 小区选择方法、小区重选方法及通信装置 - Google Patents

小区选择方法、小区重选方法及通信装置 Download PDF

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Publication number
WO2023098616A1
WO2023098616A1 PCT/CN2022/134651 CN2022134651W WO2023098616A1 WO 2023098616 A1 WO2023098616 A1 WO 2023098616A1 CN 2022134651 W CN2022134651 W CN 2022134651W WO 2023098616 A1 WO2023098616 A1 WO 2023098616A1
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Prior art keywords
cell
ccc
bcc
information
terminal device
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PCT/CN2022/134651
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English (en)
French (fr)
Inventor
马川
晋英豪
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华为技术有限公司
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Publication of WO2023098616A1 publication Critical patent/WO2023098616A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Definitions

  • the present application relates to the field of communication technologies, and in particular to a cell selection method, a cell reselection method, and a communication device.
  • carriers can be divided into basic carrier (basic component carrier, BCC) and capacity carrier (capacity component carrier, CCC).
  • BCC basic carrier
  • CCC capacity carrier
  • the BCC cell broadcasts the synchronization signal block (synchronization signal block, SSB) and At the same time as the system information (system information, SI), the SI of the CCC cell is also broadcast.
  • the CCC cell does not broadcast SI, but only broadcasts a discovery reference signal (DRS).
  • DRS discovery reference signal
  • the terminal device When the terminal device accesses the network for the first time, it needs to select a cell that meets the cell selection criteria to camp on, that is, the terminal device needs to perform cell selection when it accesses the network for the first time.
  • the terminal device searches for a BCC cell and the BCC cell satisfies the cell selection criterion, the terminal device may directly select the BCC cell to camp on, or may select a CCC cell associated with the BCC cell to camp on. Therefore, how to select a suitable cell for terminal equipment to camp on is an urgent problem to be solved.
  • the embodiment of the present application discloses a cell selection method, a cell reselection method and a communication device, which can select a suitable cell to reside in.
  • the embodiment of the present application provides a cell selection method, including:
  • the broadcast message includes indication information, and the indication information is used to indicate to camp on a first CCC cell, where the first CCC cell is a CCC cell associated with a BCC cell, and the BCC cell is a cell searched by the terminal device a BCC cell that satisfies the cell selection criterion; and determine whether to camp on the first CCC cell according to the indication information and the cell selection criterion.
  • the terminal device can clearly know that it can camp on the first CCC cell by receiving the broadcast message, thereby effectively improving the situation that the terminal device camps on other cells such as the BCC cell but the BCC cell is overloaded, so that The terminal device can camp on a suitable cell.
  • the indication information indicates that the terminal device may camp on the first CCC cell, and whether the terminal device camps on the first CCC cell may be further determined according to a cell selection criterion.
  • the foregoing broadcast message is sent by a network device communicating with the terminal device.
  • the terminal device determines whether to camp on the first CCC cell according to the indication information included in the received broadcast message and the cell selection criterion. If the first CCC cell satisfies the cell selection criterion, it is determined to camp on the first CCC cell.
  • the network device instructs the terminal device to camp on the first CCC cell by using the indication information, and can instruct the terminal device to select an appropriate cell to camp on.
  • the first CCC cell is any one of one or more CCC cells associated with the BCC cell.
  • the terminal device determines through the received broadcast message that it can camp on any one of the one or more CCC cells associated with the above BCC cell.
  • the terminal device may search for the one or more CCC cells, and select a CCC cell that satisfies the cell selection criterion among the one or more CCC cells to camp on, thereby reducing the load of the BCC cell.
  • the indication information includes identification information of the first CCC cell.
  • the terminal device determines that it can camp on the first CCC cell by carrying the identification information of the first CCC cell in the indication information.
  • the above-mentioned first CCC cell is a cell determined by the network device and is suitable for the terminal device to camp on, for example, the first CCC cell is in a low load state, or the first CCC cell receives less interference.
  • the terminal device can more accurately know a suitable cell that can camp on, so that the terminal device camps on a suitable cell, so as to ensure the communication quality between the terminal device and the network device.
  • the broadcast message includes indication information, including:
  • the broadcast message includes the information of the first CCC cell, and the indication information is included in the information of the first CCC cell.
  • the terminal device may determine that it can camp on the first CCC cell through the indication information carried in the information of the first CCC cell.
  • the above-mentioned first CCC cell is a cell suitable for the terminal device to camp on determined by the network device, for example, the first CCC cell is in a low load state, or the first CCC cell suffers less interference.
  • the terminal device can more accurately know the suitable cell that can be camped on, so that the terminal device can camp on a suitable cell, so as to ensure the communication quality between the terminal device and the network device.
  • the information about the first CCC cell includes an identifier of the first CCC cell and access information of the first CCC cell.
  • the identifier of the first CCC cell is used to enable the terminal device to quickly search for the first CCC cell
  • the access information of the first CCC cell includes the cell selection parameters of the first CCC cell
  • the terminal device can Determine whether the first CCC cell satisfies the cell selection criterion according to the cell selection parameter of the first CCC cell.
  • the information of the above-mentioned first CCC cell includes the identifier of the first CCC cell and the access information of the first CCC cell, and the terminal device can quickly search for the above-mentioned first CCC cell according to the identifier of the first CCC cell and determine whether the first CCC cell is The cell selection criterion is satisfied, thereby improving the efficiency of cell selection.
  • the first CCC cell is in a low load state.
  • the above-mentioned first CCC cell is in a low-load state
  • the network device instructs the terminal device to camp in the first CCC cell through the indication information carried in the broadcast message, which can ensure the communication quality between the terminal device and the network device .
  • the broadcast message further includes information about the BCC cell.
  • the above broadcast message may be a broadcast message broadcast by a BCC cell deployed on the above network device, and the above broadcast message includes information about the BCC cell.
  • the terminal device may determine whether the BCC cell satisfies the cell selection criterion according to the information of the BCC cell.
  • the broadcast message of the BCC cell carries the information of the BCC cell and the indication information used to instruct the terminal device to camp on the first CCC cell. When the cell selection criterion is satisfied, determining whether to camp on the first CCC cell according to the above indication information and the cell selection criterion can improve the efficiency of cell selection.
  • the determining whether to camp on the first CCC cell according to the indication information and the cell selection criterion includes:
  • first CCC cell does not meet the cell selection criterion, determine not to camp on the first CCC cell; or, if the first CCC cell meets the cell selection criterion, determine to camp Reserve the first CCC cell.
  • the first CCC cell when the first CCC cell satisfies the foregoing cell selection criterion, it is determined to camp on the first CCC cell. In a case where the first CCC cell does not satisfy the above cell selection criterion, it is determined not to camp on the first CCC cell.
  • the cell where the terminal device resides needs to meet the cell selection criteria, so as to ensure that the terminal device can communicate with the network device normally.
  • the method further includes:
  • the above-mentioned BCC cell satisfies the above-mentioned cell selection criteria, and the terminal device determines to camp on the above-mentioned BCC cell when it is determined not to camp in the above-mentioned first CCC cell, and completes the cell selection process to ensure that the terminal device can communicate with
  • the network devices communicate normally.
  • the receiving the broadcast message includes:
  • the broadcast message is received.
  • the network device when the above-mentioned BCC cell is in a high-load state, the network device sends the above-mentioned broadcast message including the indication information, and carries the indication information in the broadcast message to instruct the terminal device to camp on the first CCC cell, thereby reducing the The load of the BCC cell.
  • the embodiment of the present application provides a cell reselection method, including:
  • the broadcast message includes neighboring cell information of the serving cell, where the neighboring cell information includes information about a CCC cell and information about a BCC cell associated with the CCC cell;
  • the foregoing broadcast message may be sent by a network device where a serving cell of the terminal device is deployed.
  • the above-mentioned broadcast message includes neighboring cell information of the serving cell, and the neighboring cell information includes the information of the CCC cell and the information of the BCC cell associated with the CCC cell, and the above-mentioned CCC cell is a neighboring cell of the serving cell.
  • the terminal device can quickly determine the BCC cell associated with the CCC cell according to the information of the BCC cell, thereby improving the efficiency of cell reselection.
  • the determining to reselect to the CCC cell according to the information of the BCC cell and a cell reselection criterion includes:
  • the terminal device since the system information of the above-mentioned CCC cell is broadcast by the above-mentioned BCC cell, the terminal device needs to confirm that the above-mentioned BCC cell is found before determining to reselect to the CCC cell.
  • the terminal device searches for a CCC cell according to the information of the above CCC cell.
  • the CCC cell meets the cell reselection criteria, it searches for a BCC cell according to the information of the above BCC cell. If the above BCC cell is found, the terminal device determines to reselect to the CCC community.
  • the terminal device searches for the CCC cell and the BCC cell respectively according to the information of the above-mentioned CCC cell and the above-mentioned BCC cell, and can quickly search for the above-mentioned CCC cell and BCC cell, reducing the search time of the CCC cell and BCC cell, thereby improving the efficiency of cell reselection .
  • the determining to reselect to the CCC cell includes:
  • the reference signal received power RSRP of the BCC cell is greater than a first threshold and the reference signal received quality RSRQ of the BCC cell is greater than a second threshold, it is determined to reselect to the CCC cell.
  • the system information of the above CCC cell is broadcast by the above BCC cell.
  • the terminal device can obtain the system information of the CCC cell from the broadcast message of the BCC cell , the terminal device determines to reselect to the above CCC cell, so as to ensure smooth progress of cell reselection.
  • the CCC cell when the CCC cell is an intra-frequency neighbor cell of the serving cell, the CCC cell satisfies the cell reselection criteria, including:
  • the CCC cell is the cell with the largest R value among the same-frequency neighboring cells of the serving cell; and the duration of the R value of the CCC cell greater than the R value of the serving cell is greater than or equal to the first duration; wherein, the The R value of the CCC cell is determined according to the RSRP of the CCC cell, and the R value of the serving cell is determined according to the RSRP of the serving cell.
  • the CCC cell when the CCC cell is a neighboring cell of the same priority and different frequency of the serving cell, the CCC cell satisfies the cell reselection criteria, including:
  • the CCC cell is the cell with the largest R value in the same priority and different frequency adjacent cells of the serving cell, and the duration of the R value of the CCC cell is greater than the R value of the serving cell is greater than or equal to the second duration;
  • the R value of the CCC cell is determined according to the Reference Signal Received Power RSRP of the CCC cell
  • the R value of the serving cell is determined according to the RSRP of the serving cell.
  • the CCC cell when the CCC cell is a low-priority inter-frequency neighbor cell of the serving cell, the CCC cell satisfies the cell reselection criteria, including: the The RSRP of the CCC cell is greater than the third threshold and the duration for which the RSRP of the serving cell is less than the fourth threshold is greater than or equal to the third duration; or, the reference signal reception quality RSRQ of the CCC cell is greater than the fifth threshold and the serving cell The duration during which the RSRQ is less than the sixth threshold is greater than or equal to the fourth duration.
  • the cell reselection criteria including: the The RSRP of the CCC cell is greater than the third threshold and the duration for which the RSRP of the serving cell is less than the fourth threshold is greater than or equal to the third duration; or, the reference signal reception quality RSRQ of the CCC cell is greater than the fifth threshold and the serving cell The duration during which the RSRQ is less than the sixth threshold is greater than or equal to the fourth duration.
  • the CCC cell when the CCC cell is a high-priority inter-frequency neighbor cell of the serving cell, the CCC cell satisfies the cell reselection criteria, including: the The duration for which the RSRP of the CCC cell is greater than the seventh threshold is greater than or equal to the fifth duration; or, the duration for which the RSRQ of the CCC cell is greater than the eighth threshold is greater than or equal to the sixth duration.
  • the information about the BCC cell includes an identifier of the BCC cell and/or a channel number of the BCC cell.
  • the information of the BCC cell above includes the identity of the BCC cell and/or the channel number of the BCC cell, and the terminal device can quickly search for the above BCC cell according to the identity of the BCC cell or the channel number of the BCC cell, thereby reducing the number of BCC cells. Cell search time.
  • the embodiment of the present application provides a communication device, including;
  • the transceiver module is configured to receive a broadcast message, the broadcast message includes indication information, and the indication information is used to indicate to camp on a first CCC cell, the first CCC cell is a CCC cell associated with a BCC cell, and the BCC cell A BCC cell that satisfies the cell selection criteria searched for by the terminal device;
  • a processing module configured to determine whether to camp on the first CCC cell according to the indication information and the cell selection criterion.
  • the first CCC cell is any one of one or more CCC cells associated with the BCC cell.
  • the indication information includes identification information of the first CCC cell.
  • the broadcast message includes indication information, including: the broadcast message includes information about a first CCC cell, and the indication information is included in the information about the first CCC cell.
  • the information about the first CCC cell includes an identifier of the first CCC cell and access information of the first CCC cell.
  • the first CCC cell is in a low load state.
  • the broadcast message further includes the information of the BCC cell.
  • the processing module is specifically configured to determine not to camp on the first CCC cell when the first CCC cell does not satisfy the cell selection criterion; or , if the first CCC cell satisfies the cell selection criterion, determine to camp on the first CCC cell.
  • the processing module is further configured to determine to camp on the BCC cell when it is determined not to camp on the first CCC cell.
  • the transceiver module is specifically configured to receive the broadcast message when the BCC cell is in a high load state.
  • the embodiment of the present application provides a communication device, including:
  • a transceiver module configured to receive a broadcast message, where the broadcast message includes neighboring cell information of the serving cell, and the neighboring cell information includes information of a CCC cell and information of an associated BCC cell of the CCC cell;
  • a processing module configured to determine to reselect to the CCC cell according to the information of the BCC cell and a cell reselection criterion.
  • the processing module is specifically configured to search for the CCC cell according to the information of the CCC cell; if the CCC cell satisfies the cell reselection criterion, according to The information of the BCC cell is searched for the BCC cell; if the BCC cell is found, it is determined to reselect to the CCC cell.
  • the processing module is specifically configured to: when the reference signal received power RSRP of the BCC cell is greater than a first threshold and the reference signal received quality RSRQ of the BCC cell is greater than a second threshold In the case of , determine to reselect to the CCC cell.
  • the CCC cell when the CCC cell is an intra-frequency neighbor cell of the serving cell, the CCC cell satisfies the cell reselection criterion, including: the CCC cell is The cell with the largest R value in the same-frequency neighboring cells of the serving cell; and the duration for which the R value of the CCC cell is greater than the R value of the serving cell is greater than or equal to the first duration; wherein, the R value of the CCC cell is greater than or equal to the first duration; The value is determined according to the RSRP of the CCC cell, and the R value of the serving cell is determined according to the RSRP of the serving cell.
  • the CCC cell when the CCC cell is a neighboring cell of the same priority and different frequency of the serving cell, the CCC cell satisfies the cell reselection criteria, including: the The CCC cell is the cell with the largest R value in the same priority and different frequency adjacent cells of the serving cell, and the duration of the R value of the CCC cell is greater than the R value of the serving cell is greater than or equal to the second duration; wherein, The R value of the CCC cell is determined according to the RSRP of the CCC cell, and the R value of the serving cell is determined according to the RSRP of the serving cell.
  • the CCC cell when the CCC cell is a low-priority inter-frequency neighbor cell of the serving cell, the CCC cell satisfies the cell reselection criteria, including: the The RSRP of the CCC cell is greater than the third threshold and the duration for which the RSRP of the serving cell is less than the fourth threshold is greater than or equal to the third duration; or, the reference signal reception quality RSRQ of the CCC cell is greater than the fifth threshold and the serving cell The duration during which the RSRQ is less than the sixth threshold is greater than or equal to the fourth duration.
  • the cell reselection criteria including: the The RSRP of the CCC cell is greater than the third threshold and the duration for which the RSRP of the serving cell is less than the fourth threshold is greater than or equal to the third duration; or, the reference signal reception quality RSRQ of the CCC cell is greater than the fifth threshold and the serving cell The duration during which the RSRQ is less than the sixth threshold is greater than or equal to the fourth duration.
  • the CCC cell when the CCC cell is a high-priority inter-frequency neighbor cell of the serving cell, the CCC cell satisfies the cell reselection criterion, including: the The duration for which the RSRP of the CCC cell is greater than the seventh threshold is greater than or equal to the fifth duration; or, the duration for which the RSRQ of the CCC cell is greater than the eighth threshold is greater than or equal to the sixth duration.
  • the information about the BCC cell includes an identifier of the BCC cell and/or a channel number of the BCC cell.
  • an embodiment of the present application provides a communication device, where the communication device includes a processor, configured to execute the method described in the first aspect or any possible implementation manner of the first aspect.
  • the processor is used to execute a program stored in the memory, and when the program is executed, the method shown in the first aspect or any possible implementation manner of the first aspect is executed.
  • the process of sending information in the above-mentioned method can be understood as the process of outputting the above-mentioned information by the processor.
  • the processor When the processor outputs the above information, the processor outputs the above information to the transceiver for transmission by the transceiver. After the above information is output by the processor, other processing may be required before reaching the transceiver.
  • the processor receives incoming information, the transceiver receives the aforementioned information and inputs it to the processor. Furthermore, after the transceiver receives the above information, the above information may need to be processed before being input to the processor.
  • the above-mentioned processor may be a processor dedicated to performing these methods, or may be a processor that executes computer instructions in a memory to perform these methods, such as a general-purpose processor.
  • the above-mentioned memory can be a non-transitory (non-transitory) memory, such as a read-only memory (read only memory, ROM), which can be integrated with the processor on the same chip, or can be respectively arranged on different chips.
  • ROM read-only memory
  • the embodiment does not limit the type of the memory and the arrangement of the memory and the processor. It can be understood that the description of the processor and the memory is also applicable to the sixth aspect shown below, and the sixth aspect will not be described in detail for the convenience of repeating the description.
  • the memory is located outside the communication device.
  • the memory is located in the above communication device.
  • the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.
  • the communication device further includes a transceiver, where the transceiver is configured to receive a signal or send a signal.
  • an embodiment of the present application provides a communication device, where the communication device includes a processor configured to execute the method described in the second aspect or any possible implementation manner of the second aspect.
  • the processor is used to execute the program stored in the memory, and when the program is executed, the method shown in the above second aspect or any possible implementation manner of the second aspect is executed.
  • the memory is located outside the communication device.
  • the memory is located in the above communication device.
  • the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.
  • the communication device further includes a transceiver, where the transceiver is configured to receive a signal or send a signal.
  • the embodiment of the present application provides a communication device, where the communication device includes a logic circuit and an interface, and the logic circuit is coupled to the interface; and the interface is configured to receive a broadcast message.
  • the logic circuit is configured to determine whether to camp on the first CCC cell according to a broadcast message.
  • the embodiment of the present application provides a communication device, where the communication device includes a logic circuit and an interface, and the logic circuit is coupled to the interface; and the interface is configured to receive a broadcast message.
  • the logic circuit is configured to determine to reselect to the CCC cell according to a broadcast message.
  • the embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program, and when it is run on a computer, any of the above-mentioned first aspect or the first aspect is possible The method shown in the implementation is executed.
  • the embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program, and when it is run on a computer, it makes possible any of the above-mentioned second aspect or the second aspect.
  • the method shown in the implementation is executed.
  • the embodiment of the present application provides a computer program product, the computer program product includes a computer program or computer code, and when it is run on a computer, the above first aspect or any possible implementation of the first aspect The method shown is executed.
  • the embodiment of the present application provides a computer program product, the computer program product includes a computer program or computer code, when it is run on a computer, it makes the second aspect or any possible implementation of the second aspect The method shown is executed.
  • an embodiment of the present application provides a computer program.
  • the computer program When the computer program is run on a computer, the method shown in the above-mentioned first aspect or any possible implementation manner of the first aspect is executed.
  • an embodiment of the present application provides a computer program.
  • the computer program When the computer program is run on a computer, the method shown in the second aspect or any possible implementation manner of the second aspect is executed.
  • FIG. 1 is a schematic diagram of a communication scenario provided by an embodiment of the present application.
  • FIG. 2A is a schematic structural diagram of a multi-carrier network provided by an embodiment of the present application.
  • FIG. 2B is a schematic structural diagram of a multi-carrier network provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a cell broadcast provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another cell broadcast provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a cell selection method provided in an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another cell selection method provided by the embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another cell selection method provided by the embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another cell selection method provided by the embodiment of the present application.
  • FIG. 9 is a schematic flowchart of another cell selection method provided by the embodiment of the present application.
  • FIG. 10 is a schematic flowchart of a cell reselection method provided by an embodiment of the present application.
  • FIG. 11 is a schematic flowchart of another cell reselection method provided by an embodiment of the present application.
  • FIG. 12 is a schematic flowchart of another cell reselection method provided by the embodiment of the present application.
  • Fig. 13 is a schematic flowchart of another cell reselection method provided by the embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, for example: global system of mobile communication (globalsystem of mobile communication, GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long termevolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, the future fifth generation (5th generation, 5G) system or new Wireless (new radio, NR), etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • long term evolution long termevolution, LTE
  • LTE frequency division duplex FDD
  • the terminal equipment in the embodiment of the present application may refer to user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication Device, User Agent, or User Device.
  • user equipment user equipment, UE
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication Device, User Agent, or User Device.
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a wireless communication function Handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in future 5G networks or terminals in future evolved public land mobile network (PLMN) equipment, etc., which are not limited in this embodiment of the present application.
  • PLMN public land mobile network
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be an evolved base station (evolutional nodeB, eNB or eNodeB) in an LTE system, or a cloud wireless access network (cloud radio access network (CRAN), or the network device can be a relay station, access point, vehicle-mounted device, wearable device, network device in the future 5G network or network device in the future evolved PLMN network, etc. , the embodiment of the present application is not limited.
  • FIG. 1 is a schematic diagram of a communication scenario in an embodiment of the present application.
  • the communication scenario includes at least one terminal device 101 and at least one network device 102 , and one terminal device 101 and one network device 102 are taken as an example in FIG. 1 .
  • the network device 102 may be an access network device, such as a base station.
  • Network device 102 includes one or more cells.
  • cell selection refers to the process in which a terminal device selects a cell that satisfies the cell selection criteria and camps on when it first accesses the network. For example, cell selection may occur when the terminal device is turned on or re-enters the network after disconnecting from the network.
  • the cell selection may also occur when the terminal equipment enters the idle state from the connected state.
  • Cell reselection refers to the process that a terminal device reselects a cell and camps on when there is a cell with better signal quality than the current serving cell after the terminal device accesses the network. For example, cell reselection may occur when the terminal equipment is in an idle state.
  • a multi-carrier network may transmit data in a parallel manner using multiple carrier signals, where each carrier may correspond to a cell.
  • a carrier may also be called a component carrier (component carrier, CC).
  • CC component carrier
  • multiple carriers in a multi-carrier network may be co-sited, that is, multiple carriers may be deployed on the same base station.
  • FIG. 2A two carriers are taken as an example in FIG. 2A , the two carriers are carrier 1 and carrier 2 respectively, and carrier 1 and carrier 2 are deployed on the same base station.
  • multiple carriers in a multi-carrier network may also be deployed at different sites, that is, multiple carriers may be deployed on different base stations.
  • FIG. 2B two carriers are taken as an example in FIG. 2B , the two carriers are carrier 1 and carrier 2 respectively, and carrier 1 and carrier 2 are respectively deployed on different base stations.
  • each cell in a multi-carrier network broadcasts its own synchronization signal block (synchronization signal slock, SSB) and system information (system information, SI) independently.
  • SSB synchronization signal block
  • SI system information
  • Fig. 3 shows an example of cell broadcasting in a multi-carrier network, and Fig. 3 takes two cells as an example.
  • the two cells are CC1 and CC2 respectively, CC1 broadcasts the SSB and SI of CC1, and CC2 broadcasts the SSB and SI of CC2.
  • carriers can be divided into basic carrier (basic component carrier, BCC) and capacity carrier (capacity component carrier, CCC). While the BCC cell broadcasts the SSB and SI of the own cell, it also broadcasts the SSB and SI of the CCC cell. Si.
  • the CCC cell does not broadcast the SSB and SI of the cell, but only broadcasts a discovery reference signal (DRS).
  • DRS has the basic function of the SSB, that is, the DRS can complete downlink time and frequency synchronization. However, the number of orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols occupied by the DRS is less than that occupied by the SSB.
  • SSB occupies 4 OFDM symbols
  • DRS may occupy 1 to 3 OFDM symbols.
  • Fig. 4 shows an example of cell broadcasting in an energy-saving architecture of a multi-carrier network, and Fig. 4 takes two cells as an example.
  • the two cells are BCC cell and CCC cell respectively, the BCC cell broadcasts the SI of the SSB and BCC cell and the SI of the CCC cell, and the CCC cell broadcasts the DRS.
  • one BCC cell may be associated with one or more CCC cells, that is, the broadcast message of one BCC cell may include system information of one or more CCC cells. Since the CCC cell does not broadcast the SI, the terminal device can acquire the SI of the CCC cell in the broadcast message of the BCC cell associated with the CCC cell.
  • the CCC cell does not broadcast the SSB and SI, but only broadcasts the DRS, which saves the OFMD symbols used to transmit the SI and SSB of the CCC cell, and can increase the time-domain shutdown. opportunity to achieve the purpose of saving power.
  • the BCC cell since the BCC cell needs to broadcast the SI of the CCC cell, the power consumption of the BCC cell will increase. However, the increased power consumption of the BCC cell is less than the saved power consumption of the CCC cell, so the overall power consumption of the multi-carrier network can be reduced.
  • a terminal device accesses the network for the first time, for example, the terminal device is powered on, exits the radio resource control (radio resource control, RRC) connected state (connected state), enters the network coverage area, or has a radio link failure (radio link failure, In the case of RLF), it is necessary to select a cell to reside in or RRC to reestablish. This process is called cell selection.
  • RRC radio resource control
  • RLF radio link failure
  • the terminal device may perform cell search on multiple frequencies. For example, a terminal device can search for the cell with the strongest signal strength on each frequency. If a cell meeting the cell selection criterion is found, the cell is selected for camping.
  • the foregoing multiple frequencies may be frequency points where cells in the mobile network configured by the terminal device are located.
  • the multiple frequencies mentioned above can be configured in a SIM (subscriber identity module) card.
  • the above cell selection criteria include S criteria.
  • the above S criterion includes: S1>0 and S2>0.
  • the above S1 may be denoted as Srxlev, indicating the cell selection receiving level value of the cell.
  • S2 may be denoted as Squal, which represents the cell selection quality value of the cell.
  • the above S1 and S2 satisfy the following formula:
  • Q1 is the reference signal receiving power (reference signal receiving power, RSRP) of the broadcast message (such as SSB or SI) of the cell
  • Q rxlevmin represents the minimum RSRP required for the cell to reside
  • Q rxlevminoffset represents the offset of Q rxlevmin
  • Pcompensation represents the power compensation value
  • Qoffsettemp represents the temporary offset
  • Q2 is the reference signal receiving quality (RSRQ) of the cell
  • Q qualmin represents the minimum RSRQ required for cell camping
  • Q qualminoffset represents the offset of Q qualmin .
  • the foregoing Q1 and Q2 may be obtained by the terminal device measuring the signal strength of the received broadcast message (eg SSB, SI) of the cell.
  • the above parameters Q rxlevmin , Q rxlevminoffset , Q qualmin , Q qualminoffset , P compensation , and Q offsetttemp may be included in the system information of the cell or may be derived from parameters in the system information of the cell.
  • Q rxlevmin , Q rxlevminoffset , Q qualmin , Q qualminoffset , P compensation , and Q offsettemp are called cell selection parameters in the embodiments of the present application.
  • the above cell selection criterion also includes a network belonging criterion.
  • the above network attribution criteria include: the network to which the cell belongs is any one of the terminal device's selected network, registered network or equivalent network.
  • the above cell selection criterion also includes a cell availability criterion.
  • the above cell availability criteria include: the cell is not barred or reserved, and the cell is not in the tracking areas included in the roaming forbidden tracking area (forbidden tracking areas for roaming) list.
  • the above cell selection criterion is only an example, and the cell selection criterion may change with the evolution of the standard technology, and in this case, it is also applicable to the method provided in the embodiment of the present application. Therefore, the cell selection criteria shown above should not be construed as limiting the implementation of this application.
  • a terminal device in RRC idle state and RRC inactive state can reselect another cell to camp on. This process is called cell re-selection.
  • the terminal device first measures the neighboring cells of the serving cell, and if a neighboring cell meeting the cell reselection criteria is measured, it reselects to the neighboring cell.
  • cell reselection may include intra-frequency cell reselection (intra-frequency cell reselection) and inter-frequency cell reselection (inter-frequency cell reselection).
  • Intra-frequency cell reselection means that the terminal device reselects to a neighboring cell with the same frequency as the serving cell.
  • Inter-frequency cell reselection means that the terminal device reselects to a neighboring cell with a frequency different from that of the serving cell.
  • the foregoing serving cell refers to a cell where the terminal device currently resides.
  • inter-frequency cell reselection is further divided into inter-frequency cell reselection with the same priority, inter-frequency cell reselection with low priority, and inter-frequency cell reselection with high priority.
  • Same priority and different frequency cell reselection means to reselect to the different frequency neighbor cell with the frequency priority equal to the serving cell low priority different frequency cell reselection means to reselect to the different frequency neighbor cell with the frequency priority lower than the serving cell
  • the priority of the above frequency is configured by the network device.
  • the terminal device when the signal strength of the serving cell of the terminal device satisfies S1 ⁇ S1 intra or S2 ⁇ S2 intra , the terminal device performs intra-frequency neighbor cell measurement.
  • S1 intra and S2 intra are the threshold values of S1 and S2 respectively, and the S1 of the terminal device in the serving cell is smaller than the threshold value S1 intra or the serving cell
  • S1 intra and S2 intra may be included in the system information of the serving cell.
  • the terminal device receives the system information broadcast by the serving cell, and obtains S1 intra and S2 intra from the system information of the serving cell.
  • the terminal device measures each same-frequency neighboring cell of the serving cell.
  • the terminal device measures a same-frequency neighbor cell, that is, receives the broadcast message of the same-frequency neighbor cell, such as SSB or SI.
  • the terminal device first determines whether the signal strength of the same-frequency neighboring cell satisfies the S criterion.
  • S criterion refer to the relevant description of the aforementioned cell selection. If the same-frequency neighboring cell satisfies the above S criterion, then calculate the R value of the same-frequency neighboring cell.
  • the R value of the co-frequency adjacent cell satisfies the following formula:
  • Qn is the RSRP of the broadcast message (such as SSB or SI) of the same-frequency neighboring cell
  • Q offset is the offset of the same-frequency neighboring cell relative to the serving cell
  • Q offsettemp, n is the offset of the same-frequency neighboring cell quantity.
  • Q offset and Q offsettemp,n are included in the system information of the serving cell.
  • the terminal device measures at least one same-frequency neighboring cell satisfying the S criterion, and calculates the R value of the at least one same-frequency neighboring cell. If within the specified time interval, the R value of the first same-frequency neighboring cell remains greater than the R value of the serving cell, and the first same-frequency neighboring cell satisfies the network belonging criterion and the cell availability criterion, the terminal device determines to reselect to the first same-frequency neighboring cell. Frequency neighbors.
  • the above-mentioned first same-frequency neighboring cell is the one with the largest R value among the above-mentioned at least one same-frequency neighboring cell.
  • the above specified time interval may be specified by a protocol, or configured by a network device.
  • the R value of the above-mentioned serving cell satisfies the following formula:
  • Qs is the RSRP of the broadcast message (such as SSB, SI) of the serving cell
  • Q hyst is the hysteresis of the serving cell
  • Q offsettemp,s is the offset of the serving cell.
  • the two parameters Q hyst and Q offsettemp,s are included in the system information of the serving cell, and Qs can be obtained by measuring the signal strength of the SSB broadcast by the serving cell.
  • the foregoing Q offset , Q offsettemp,n , Q hyst , and Q offsettemp,s may be referred to as cell reselection parameters.
  • the above R value of the cell may indicate the cell reselection priority of the cell.
  • the terminal device when the signal strength of the serving cell satisfies S1 ⁇ S1 non-intra or S2 ⁇ S2 non-intra , the terminal device performs the same priority and different frequency neighbor cell measurement.
  • S1 and S2 can refer to the relevant description in the aforementioned cell selection.
  • the above-mentioned S1 non-intra and S2 non-intra are the threshold values of S1 and S2 respectively, and the S1 of the terminal device in the serving cell is smaller than the threshold value S1 non-intra Or when the S2 of the serving cell is less than or equal to the threshold value S2 non-intra , the same priority and different frequency neighbor cell measurement is performed so as to reselect to the same priority and different frequency neighbor cell.
  • S1 non-intra and S2 non-intra are included in the system information of the serving cell.
  • the terminal device receives the system information broadcast by the serving cell, and obtains S1 non-intra and S2 non-intra from the system information.
  • the terminal device measures each neighboring cell of the same priority and different frequency of the serving cell. If the measured adjacent cell with the same priority and different frequency satisfies the S criterion, calculate the R value of the adjacent cell with the same priority and different frequency.
  • calculate the R value of the adjacent cell with the same priority and different frequency For the calculation of the R value of the above-mentioned same-priority and different-frequency adjacent cells, refer to the relevant description of the R value of the same-frequency adjacent cells reselected by the same-frequency cell.
  • the terminal device measures at least one same-priority and different-frequency neighboring cell satisfying the S criterion, and calculates the R value of the above-mentioned at least one same-priority and different-frequency neighboring cell. If within the specified time interval, the R value of the first same-priority and different-frequency neighboring cell remains greater than the R value of the serving cell, and the first same-priority and different-frequency neighboring cell satisfies the network belonging criterion and the cell availability criterion, the terminal device determines Reselect to the first neighbor cell with the same priority and different frequency.
  • the first same-priority and different-frequency neighboring cell is the one with the largest R value among the at least one same-priority and different-frequency neighboring cell.
  • R value of the serving cell refer to the relevant description of the above-mentioned R value of the same-frequency cell reselection of the serving cell.
  • the terminal device when the signal strength of the serving cell satisfies S1 ⁇ S1 non-intra or S2 ⁇ S2 non-intra , the terminal device performs low-priority inter-frequency neighboring cell measurement.
  • S1 and S2 can refer to the relevant description in the aforementioned cell selection.
  • S1 non-intra and S2 non-intra are the threshold values of S1 and S2 respectively, and the S1 of the terminal device in the serving cell is less than the threshold value S1non-intra or When the S2 of the serving cell is less than or equal to the threshold value S2 non-intra , low-priority inter-frequency neighbor cell measurement is performed so as to reselect to a low-priority inter-frequency neighbor cell.
  • S1 non-intra and S2 non-intra are included in the system information of the serving cell.
  • the terminal device receives the system information broadcast by the serving cell, and obtains S1 non-intra and S2 non-intra from the system information.
  • the terminal device measures a first low-priority inter-frequency neighboring cell, where the first low-priority inter-frequency neighboring cell is any one of at least one low-priority inter-frequency neighboring cell of the serving cell.
  • the terminal device determines to reselect to the first low-priority inter-frequency neighbor cell.
  • the above low priority inter-frequency neighboring cell reselection conditions include the following conditions:
  • Th s,low,p , Th x,low,p , Th s,low,q , Th x,low,q represent threshold values, and these parameters are included in the system information of the serving cell.
  • the terminal device determines to reselect to the first low-priority inter-frequency neighboring cell.
  • the above low-priority inter-frequency neighboring cell reselection conditions are only examples, and the low-priority inter-frequency neighboring cell reselection conditions in this embodiment of the application are not limited to the above two examples, and may also include New other low-priority inter-frequency neighbor reselection conditions appear. Therefore, the low-priority inter-frequency neighboring cell reselection conditions shown above should not be understood as limiting the implementation of this application.
  • the terminal device measures the high-priority inter-frequency neighboring cells of the serving cell.
  • the terminal device may periodically measure a high-priority inter-frequency neighboring cell, so as to reselect to a high-priority inter-frequency neighboring cell.
  • the terminal device measures the first high-priority inter-frequency neighboring cell, where the first high-priority inter-frequency neighboring cell is any one of at least one high-priority inter-frequency neighboring cell of the serving cell.
  • the terminal device determines to reselect to the first high-priority inter-frequency neighbor cell.
  • the above high-priority inter-frequency neighboring cell reselection conditions include the following conditions:
  • the first high-priority inter-frequency neighboring cell maintains S1>Th x,high,p within a specified time interval;
  • the first high-priority inter-frequency neighboring cell maintains S2>Th x,high,q within a specified time interval.
  • Th x, high, p and Th x, high, q represent threshold values, and these parameters are included in the system information of the serving cell.
  • the above high-priority inter-frequency neighbor reselection conditions are only examples, and the high-priority inter-frequency neighbor reselection conditions in this embodiment of the application are not limited to the above two examples, and may also include New other high-priority inter-frequency neighbor reselection conditions appear. Therefore, the high-priority inter-frequency neighboring cell reselection conditions shown above should not be understood as a limitation on the implementation of this application.
  • FIG. 5 is a schematic flowchart of a method for selecting a cell provided in an embodiment of the present application. As shown in Fig. 5, the cell selection method includes but not limited to the following steps.
  • the terminal device receives a broadcast message sent by the network device, where the broadcast message includes indication information, and the indication information is used to indicate to camp on a first CCC cell, where the first CCC cell is a CCC cell associated with a BCC cell, and the The BCC cell mentioned above is a BCC cell that satisfies the cell selection criterion searched by the terminal device.
  • the foregoing broadcast message may be any broadcast message broadcast by a network device communicating with the terminal device, or may be a broadcast message broadcast by a BCC cell deployed on the foregoing network device.
  • the foregoing broadcast message includes indication information, and the indication information is used to instruct the terminal device to camp on the first CCC cell associated with the BCC cell. It can be understood that the above indication information may also be used to instruct the terminal device to preferentially camp on the first CCC cell among the above BCC cell and one or more CCC cells associated with the BCC cell.
  • the terminal device determines whether the first CCC cell satisfies the cell selection criteria.
  • the above cell selection criteria may include S criteria, that is, S1>0 and S2>0.
  • the above-mentioned BCC cell satisfies the cell selection criterion, that is, S1>0 and S2>0 of the above-mentioned BCC cell.
  • the calculation formulas of S1 and S2 of the BCC cell refer to relevant descriptions in the aforementioned cell selection. It can be understood that for specific descriptions about cell selection criteria, reference may also be made to the above, which will not be described in detail here.
  • the foregoing terminal device finding the BCC cell means that the terminal device detects a broadcast message (such as SSB, SI) broadcast by the BCC cell. After the terminal device detects the broadcast message broadcast by the above-mentioned BCC cell, it measures the received broadcast message to obtain the RSRP and RSRQ of the broadcast message of the BCC cell. The above-mentioned BCC cell of the terminal device is searched by the terminal device and meets the cell selection criteria The BCC community.
  • a broadcast message such as SSB, SI
  • the above cell selection criterion also includes a network belonging criterion and a cell availability criterion.
  • a network belonging criterion and a cell availability criterion.
  • a cell availability criterion For the specific description of the above-mentioned network belonging criterion and cell availability criterion, reference may be made to the above, and details will not be detailed here.
  • the above-mentioned BCC cell and the above-mentioned first CCC cell may be deployed on the same network device (co-site deployment), or may be deployed on different network devices (off-site deployment).
  • the above broadcast message further includes information of the BCC cell.
  • the information of the above BCC cell may include the identifier of the BCC cell and the access information of the BCC cell.
  • the above-mentioned broadcast message is a broadcast message of a BCC cell.
  • the terminal device determines whether the BCC cell satisfies the above-mentioned cell selection criterion according to the information of the BCC cell included in the broadcast message.
  • the access information of the above-mentioned BCC cell includes the cell selection parameters of the BCC
  • the terminal device detects the RSRP and RSRQ of the received broadcast message, and calculates the S1 and S2 of the BCC cell according to the above-mentioned RSRP, RSRQ and the cell selection parameters of the BCC cell.
  • S1 and S2 of the BCC cell satisfy S1>0 and S2>0, it is determined that the BCC cell satisfies the above cell selection criterion.
  • the above BCC cell identity may include a PCI or a cell identity (cell identity).
  • the above-mentioned access information of the BCC cell may include cell selection parameters of the BCC cell, a barring factor (Barring Factor) used for cell access control, and the like.
  • Barring Factor Barring Factor
  • the above BCC cell information may further include configuration information of the BCC cell.
  • the configuration information of the above-mentioned BCC cell may include the time domain and frequency domain positions of the physical downlink control channel (physical downlink control channel, PCCCH) and the physical downlink shared channel (physical downlink shared channel, PDSCH), physical random access channel (physical random access channel) channel, PRACH) root sequence index, etc.
  • the above broadcast message may be a broadcast message broadcast by a BCC cell deployed on the above network device, and the above broadcast message includes information about the BCC cell.
  • the terminal device may determine whether the BCC cell satisfies the cell selection criterion according to the information of the BCC cell.
  • the broadcast message of the BCC cell carries the information of the BCC cell and the indication information used to instruct the terminal device to camp on the first CCC cell. When the cell selection criterion is satisfied, determining whether to camp on the first CCC cell according to the above indication information and the cell selection criterion can improve the efficiency of cell selection.
  • the above-mentioned receiving broadcast message includes the following steps:
  • the network device when the above-mentioned BCC cell is in a high-load state, the network device sends the above-mentioned broadcast message including indication information to instruct the terminal device to camp on the first CCC cell, so as to reduce the load of the BCC cell.
  • the network device when the interference of the first CCC cell is small, sends the broadcast message including the indication information to instruct the terminal device to camp on the first CCC cell.
  • the smaller interference of the first CCC cell may mean that the interference of the first CCC cell is smaller than the interference of the BCC cell, or may mean that the interference of the first CCC cell is smaller than a set threshold. Since the interference of the first CCC cell is relatively small, the terminal device accessing the first CCC cell can use relatively small power to transmit data, thereby improving transmission power efficiency.
  • Case 1 the above-mentioned first CCC cell is any one of one or more CCC cells associated with the above-mentioned BCC cell.
  • the above-mentioned BCC cell may be associated with one or more CCC cells, and the above-mentioned indication information is used to instruct the terminal device to camp on any one of the one or more CCC cells associated with the above-mentioned BCC cell.
  • the terminal device determines through the received broadcast message that it can camp on any one of the one or more CCC cells associated with the above BCC cell.
  • the terminal device may search for the one or more CCC cells, and select a CCC cell that satisfies the cell selection criterion among the one or more CCC cells to camp on, thereby reducing the load of the BCC cell.
  • the indication information includes the identification information of the first CCC cell, that is, the first CCC cell is the CCC cell corresponding to the identification information carried in the indication information.
  • the terminal device determines that it can camp on the first CCC cell by carrying the identification information of the first CCC cell in the indication information.
  • the above-mentioned first CCC cell is a cell determined by the network device and is suitable for the terminal device to camp on, for example, the first CCC cell is in a low load state, or the first CCC cell receives less interference.
  • the terminal device can more accurately know a suitable cell that can camp on, so that the terminal device camps on a suitable cell, so as to ensure the communication quality between the terminal device and the network device.
  • the above-mentioned first CCC cell is in a low load state.
  • the above-mentioned first CCC cell being in a low load state may refer to a CCC cell whose occupancy rate of a resource block (resource block, RB) of the first CCC cell is less than a set threshold, for example, the occupancy rate of the RB of the first CCC cell less than 30%.
  • the low load state of the first CCC cell may also mean that the number of RRC connected users of the first CCC cell is less than a set threshold, for example, the number of RRC connected users of the first CCC cell is less than 600. It should be understood that the aforementioned RB occupancy rate of less than 30% and the number of RRC connected users less than 600 are just examples, and should not be construed as limiting the present application.
  • the fact that the above-mentioned first CCC cell is in a low-load state may also be understood as that the load of the first CCC cell is smaller than the load of the above-mentioned BCC cell.
  • the indication information may carry identification information of multiple CCC cells, and the first CCC cell is any one of the multiple CCC cells.
  • the above indication information is used to instruct the terminal device to camp on any one of the above multiple CCC cells.
  • the above-mentioned indication information carries the identification information of the above-mentioned first CCC cell to instruct the terminal device to camp on the above-mentioned first CCC cell, which can ensure Communication quality between end devices and network devices.
  • the above broadcast message includes the information of the first CCC cell, and the above indication information is included in the information of the first CCC cell, that is, the above-mentioned first CCC cell is one or more CCC cells associated with the BCC cell.
  • a CCC cell carrying the above indication information is included in the information of the first CCC cell, that is, the above-mentioned first CCC cell is one or more CCC cells associated with the BCC cell.
  • the terminal device may determine that it can camp on the first CCC cell according to the indication information carried in the information of the first CCC cell.
  • the above-mentioned first CCC cell is a cell suitable for the terminal device to camp on determined by the network device, for example, the first CCC cell is in a low load state, or the first CCC cell suffers less interference.
  • the terminal device can more accurately know the suitable cell that can be camped on, so that the terminal device can camp on a suitable cell, so as to ensure the communication quality between the terminal device and the network device.
  • the information about the first CCC cell includes an identifier of the first CCC cell and access information of the first CCC cell.
  • the identifier of the first CCC cell may include a physical cell identifier (physical cell identifier, PCI) or a cell identity (cell identity).
  • the above identifier of the first CCC cell is used to enable the terminal device to quickly search for the first CCC cell.
  • the access information of the first CCC cell includes parameter information of the first CCC cell, the parameter information is used to determine the information of the cell selection parameters of the first CCC cell, and the cell selection parameters include Q rxlevmin and Q rxlevminoffset of the first CCC cell , Q qualmin , Q qualminoffset .
  • the terminal device may determine whether the first CCC cell satisfies the above cell selection criterion according to the cell selection parameters of the first CCC cell and the detected signal strength of the SSB of the first CCC cell.
  • the access information of the first CCC cell may further include a barring factor used for cell access control and the like.
  • the above-mentioned information of the first CCC cell may also include configuration information of the first CCC cell, such as: the time domain and frequency domain positions of the Physical Downlink Control Channel (PCCCH) and the Physical Downlink Shared Channel (PDSCH), physical random access The root sequence index of the incoming channel (PRACH), etc.
  • configuration information of the first CCC cell such as: the time domain and frequency domain positions of the Physical Downlink Control Channel (PCCCH) and the Physical Downlink Shared Channel (PDSCH), physical random access The root sequence index of the incoming channel (PRACH), etc.
  • the identifier of the first CCC cell is used to enable the terminal device to quickly search for the first CCC cell
  • the access information of the first CCC cell includes the cell selection parameters of the first CCC cell
  • the terminal device can Determine whether the first CCC cell satisfies the cell selection criterion according to the cell selection parameter of the first CCC cell.
  • the information of the above-mentioned first CCC cell includes the identifier of the first CCC cell and the access information of the first CCC cell, and the terminal device can quickly search for the above-mentioned first CCC cell according to the identifier of the first CCC cell and determine whether the first CCC cell is The cell selection criterion is satisfied, thereby improving the efficiency of cell selection.
  • the above-mentioned first CCC cell is in a low load state.
  • the fact that the first CCC cell is in a low load state may be understood as that the load of the first CCC cell is smaller than the load of the BCC cell.
  • the above-mentioned broadcast message may include information of multiple CCC cells associated with the above-mentioned BCC, and the above-mentioned first CCC cell is one of the CCC cell information among the above-mentioned multiple CCC cells that carries indication information.
  • the above-mentioned broadcast message may include a plurality of indication information, and the above-mentioned multiple indication information may be respectively included in the information of the above-mentioned multiple CCC cells, the above-mentioned multiple CCC cells are CCC cells in a low-load state, and the above-mentioned first CCC The cell is one of the above multiple CCC cells.
  • the network device instructs the terminal device to camp on any one of the above multiple CCC cells by carrying the above indication information in the information of the multiple CCCs in the low load state.
  • the above-mentioned first CCC cell is in a low-load state, and the network device instructs the terminal device to camp on the first CCC cell through the indication information carried in the information of the first CCC cell, which can ensure that the terminal device and the network device communication quality between them.
  • the terminal device determines whether to camp on the first CCC cell according to the foregoing indication information and the cell selection criterion.
  • the above indication information is used to instruct the terminal device to camp on the first CCC cell, and before the terminal device camps on the first CCC cell, it needs to determine whether the first CCC cell satisfies the cell selection criterion. If the first CCC cell satisfies the above cell selection criterion, the terminal device may camp on the first CCC cell.
  • the broadcast message includes an identifier of the first CCC cell and access information of the first CCC cell, such as a cell identifier and a channel number of the first CCC cell.
  • the terminal device searches for the first CCC cell according to the information of the first CCC cell, for example, searches for a cell whose cell ID is the cell ID of the first CCC cell on a channel corresponding to the channel number of the first CCC cell. If the terminal device searches for a cell whose cell identifier is the cell identifier of the first CCC cell on the frequency channel, it determines that the first CCC cell is found.
  • the terminal device finds the above-mentioned first CCC cell, that is, the terminal device receives a broadcast message, such as a DRS, broadcast by the first CCC cell. After receiving the DRS of the first CCC cell, the terminal device determines whether the first CCC cell satisfies the above cell selection criterion according to the signal strength of the received DRS.
  • a broadcast message such as a DRS
  • the terminal device can clearly know that it can camp on the first CCC cell by receiving the broadcast message, thereby effectively improving the situation that the terminal device camps on other cells such as the BCC cell but the BCC cell is overloaded, so that The terminal device can camp on a suitable cell.
  • the indication information indicates that the terminal device can camp on the first CCC cell, and whether the terminal device camps on the first CCC cell can be further determined according to a cell selection criterion.
  • the above-mentioned determination of whether to camp on the first CCC cell according to the indication information and the cell selection criterion includes the following steps:
  • the broadcast message includes the identifier of the first CCC cell
  • the terminal device searches for the first CCC cell according to the identifier of the first CCC cell, and detects the RSRP and RSRQ of the DRS of the first CCC cell.
  • the terminal device determines the cell selection parameters of the first CCC cell according to the access information of the first CCC cell.
  • S1 and S2 of the first CCC cell are calculated by using the RSRP and RSRQ of the first CCC cell and the cell selection parameters of the first CCC cell. If S1 and S2 of the first CCC cell satisfy S1>0 and S2>0, it is determined that the first CCC cell satisfies the foregoing cell selection criterion. Otherwise, it is determined that the first CCC cell does not satisfy the cell selection criterion.
  • the terminal device determines to camp on the foregoing first CCC cell. In the case that the first CCC cell does not satisfy the cell selection criterion, the terminal device determines not to camp in the first CCC cell, so as to ensure that the terminal device can communicate normally with the network device.
  • the cell selection method further includes the following steps:
  • the above-mentioned BCC cell is a BCC cell that satisfies the above-mentioned cell selection criterion searched by the terminal device. Therefore, if the above-mentioned first CCC cell does not meet the above-mentioned cell selection criterion, the terminal device may select the above-mentioned BCC cell to camp on. That is, after the terminal device determines not to camp on the first CCC cell, it determines to camp on the BCC cell.
  • the terminal device may also search for other CCC cells in the one or more CCC cells except the first CCC cell, and determine according to the above cell selection criteria Whether to reside in other CCC cells mentioned above. In a case where there is a CCC cell that satisfies the cell selection criterion among the one or more CCC cells, the terminal device determines to camp on the CCC cell that satisfies the cell selection criterion. In a case where none of the above one or more CCC cells satisfies the above cell selection criterion, the terminal device determines to camp on the above BCC cell.
  • the above-mentioned BCC cell satisfies the above-mentioned cell selection criteria, and the terminal device determines to camp on the above-mentioned BCC cell when it is determined not to camp in the above-mentioned first CCC cell, and completes the cell selection process to ensure that the terminal device can communicate with
  • the network devices communicate normally.
  • FIG. 6 is a schematic flowchart of another method for selecting a cell according to an embodiment of the present application. As shown in Fig. 6, the cell selection method includes but not limited to the following steps.
  • a terminal device receives a broadcast message sent by a network device.
  • the foregoing broadcast message is broadcast by a BCC cell deployed on the network device.
  • the broadcast message includes information of the BCC cell, the information of the BCC cell includes access information of the BCC cell, and the access information includes cell selection parameters of the BCC cell.
  • the terminal device measures the RSRP and RSRQ of the broadcast message, and then calculates S1 and S2 of the BCC cell according to the RSRP and RSRQ of the broadcast message and the cell selection parameters of the BCC cell. In the case that S1 and S2 of the BCC cell satisfy S1>0 and S2>0, it is determined that the BCC cell satisfies the above cell selection criteria.
  • the above-mentioned BCC cell is a BCC cell that satisfies the above-mentioned cell selection criterion and is searched by the terminal device on multiple frequencies.
  • the terminal device searches multiple BCC cells on multiple frequencies, that is, detects broadcast messages (such as SSB, SI) of multiple BCC cells on multiple frequencies.
  • broadcast messages such as SSB, SI
  • the terminal device detects the broadcast message of the BCC cell, and determines whether the BCC cell satisfies the cell selection criteria. If the BCC cell does not meet the above cell selection criterion, continue to search for a BCC cell that meets the above cell selection criterion.
  • the terminal device determines whether the broadcast message includes indication information.
  • the above indication information is used to instruct the terminal device to camp on the first CCC cell associated with the above BCC cell.
  • the above-mentioned first CCC cell is any one of one or more CCC cells associated with the above-mentioned BCC cell.
  • the terminal device can choose the above BCC cell to camp on, or choose any one of the one or more CCC cells associated with the above BCC cell to camp on. Applications are not limited.
  • the terminal device determines the load status of the BCC cell.
  • the terminal device selects the above-mentioned BCC cell to camp on.
  • the terminal device searches for the aforementioned one or more CCC cells according to the information of the CCC cells included in the broadcast message. If a CCC cell satisfying the above cell selection criterion is found, it is determined to camp on the CCC cell.
  • the terminal device searches for the first CCC cell.
  • the broadcast message includes information about the first CCC cell, such as a cell identifier and a channel number of the first CCC cell.
  • the terminal device searches for the first CCC cell according to the information of the first CCC cell, for example, searches for a cell whose cell ID is the cell ID of the first CCC cell on a channel corresponding to the channel number of the first CCC cell. If the terminal device searches for a cell whose cell identifier is the cell identifier of the first CCC cell on the frequency channel, it determines that the first CCC cell is found.
  • the terminal device determines whether to camp on the first CCC cell according to the cell selection criterion.
  • the terminal device finds the above-mentioned first CCC cell, that is, the terminal device receives a broadcast message, such as a DRS, broadcast by the first CCC cell. After receiving the DRS of the first CCC cell, the terminal device measures the DRS of the first CCC cell to obtain the RSRP and RSRQ of the DRS of the first CCC cell.
  • a broadcast message such as a DRS
  • the information of the first CCC cell further includes access information of the first CCC cell, and the access information includes cell selection parameters of the first CCC cell.
  • the terminal device calculates S1 and S2 of the first CCC cell according to the above-mentioned RSRP and RSRQ of the DRS and the cell selection parameters of the first CCC cell. In a case where S1 and S2 of the first CCC cell satisfy S1>0 and S2>0, it is determined that the first CCC cell satisfies the foregoing cell selection criteria.
  • the terminal device determines to camp on the first CCC cell.
  • the terminal device determines not to camp on the first CCC cell.
  • the terminal device searches for other CCC cells except the first CCC cell among the one or more CCC cells, and determines whether to camp on the other CCC cells according to the above cell selection criterion.
  • the terminal device determines to select the above BCC cell to camp on.
  • the terminal device determines through the received broadcast message that it can camp on any one of the one or more CCC cells associated with the above BCC cell.
  • the terminal device may search for the one or more CCC cells, and select a CCC cell that satisfies the cell selection criterion among the one or more CCC cells to camp on, thereby reducing the load of the BCC cell.
  • the transmission power efficiency can also be improved by instructing the terminal device to camp on the first CCC cell through the indication information.
  • FIG. 7 is a schematic flowchart of another cell selection method provided in an embodiment of the present application, which can also be understood as a supplement or modification of the cell selection method in FIG. 6 above. As shown in Fig. 7, the cell selection method includes but not limited to the following steps.
  • step 701 The BCC cell satisfies the cell selection criteria.
  • step 701 reference may be made to the relevant description of step 601, which will not be described in detail here.
  • step 702. Determine whether indication information is included in the broadcast message. If yes, execute step 703.
  • the terminal device may select the above-mentioned BCC cell to camp on, or may search for one or more CCC cells associated with the BCC cell, and select from one or more CCC cells Select a CCC cell that satisfies the cell selection criteria to camp on, which is not limited in this application.
  • step 705 Whether a searched CCC cell satisfies a cell selection criterion. If yes, go to step 705; if not, go to step 703.
  • the terminal device determines through the received broadcast message that it can camp on any one of the one or more CCC cells associated with the above BCC cell.
  • the terminal device may search for the one or more CCC cells, and select a CCC cell that satisfies the cell selection criterion among the one or more CCC cells to camp on, thereby reducing the load of the BCC cell.
  • the transmission power efficiency can also be improved by instructing the terminal device to camp on the first CCC cell through the indication information.
  • FIG. 8 is a schematic flowchart of another method for selecting a cell provided in an embodiment of the present application. As shown in Fig. 8, the cell selection method includes but not limited to the following steps.
  • a terminal device receives a broadcast message sent by a network device.
  • the foregoing broadcast message is broadcast by a BCC cell deployed on the network device.
  • the broadcast message includes information of the BCC cell, the information of the BCC cell includes access information of the BCC cell, and the access information includes cell selection parameters of the BCC cell.
  • the terminal device measures the RSRP and RSRQ of the broadcast message, and then calculates S1 and S2 of the BCC cell according to the RSRP and RSRQ of the broadcast message and the cell selection parameters of the BCC cell. In the case that S1 and S2 of the BCC cell satisfy S1>0 and S2>0, it is determined that the BCC cell satisfies the above cell selection criteria.
  • the foregoing BCC cell is a BCC cell that satisfies the foregoing cell selection criterion and is searched by the terminal device on multiple frequencies.
  • the terminal device searches multiple BCC cells on multiple frequencies, that is, detects broadcast messages (such as SSB, SI) of multiple BCC cells on multiple frequencies.
  • broadcast messages such as SSB, SI
  • the terminal device detects the broadcast message of the BCC cell, and determines whether the BCC cell satisfies the cell selection criteria. If the BCC cell does not meet the above cell selection criterion, continue to search for a BCC cell that meets the above cell selection criterion.
  • the terminal device searches for the foregoing first CCC cell.
  • the first CCC cell is associated with the BCC cell.
  • the broadcast message further includes information about the first CCC cell, and the information about the first CCC cell includes indication information.
  • the foregoing indication information is used to instruct the terminal device to camp on the first CCC cell.
  • the information about the first CCC cell further includes an identifier of the first CCC cell.
  • the terminal device searches for the first CCC cell according to the identifier of the first CCC cell.
  • the identity of the first CCC cell includes the cell identity and the channel number of the first CCC cell, and the terminal device searches for a cell whose cell identity is the cell identity of the first CCC cell on the channel corresponding to the channel number of the first CCC cell. If the terminal device searches for a cell whose cell identifier is the cell identifier of the first CCC cell on the frequency channel, it determines that the first CCC cell is found.
  • the above-mentioned first CCC cell is in a low load state.
  • the above-mentioned first CCC cell being in a low load state may refer to a CCC cell whose occupancy rate of a resource block (resource block, RB) of the first CCC cell is less than a set threshold, for example, the occupancy rate of the RB of the first CCC cell less than 30%.
  • the low load state of the first CCC cell may also mean that the number of RRC connected users of the first CCC cell is less than a set threshold, for example, the number of RRC connected users of the first CCC cell is less than 600.
  • the fact that the first CCC cell is in a low load state may be understood as that the load of the first CCC cell is smaller than the load of the BCC cell.
  • the above-mentioned broadcast message may include information of multiple CCC cells associated with the above-mentioned BCC, and the above-mentioned first CCC cell is one of the CCC cell information among the above-mentioned multiple CCC cells that carries indication information.
  • the above-mentioned broadcast message may include a plurality of indication information, and the above-mentioned multiple indication information may be respectively included in the information of the above-mentioned multiple CCC cells, the above-mentioned multiple CCC cells are CCC cells in a low-load state, and the above-mentioned first CCC The cell is one of the above multiple CCC cells.
  • the network device instructs the terminal device to camp on any one of the above multiple CCC cells by carrying the above indication information in the information of the multiple CCCs in the low load state.
  • the terminal device may select the above-mentioned BCC cell to camp on, or may select the above-mentioned BCC cell Any one of the associated one or more CCC cells camps on, which is not limited in this application.
  • the terminal device determines the load state of the BCC cell.
  • the terminal device selects the above-mentioned BCC cell to camp on.
  • the terminal device searches for the aforementioned one or more CCC cells according to the information of the CCC cells included in the broadcast message. If a CCC cell satisfying the above cell selection criterion is found, it is determined to camp on the CCC cell.
  • the terminal device determines whether to camp on the first CCC cell according to a cell selection criterion.
  • the terminal device finds the above-mentioned first CCC cell, that is, the terminal device receives a broadcast message, such as a DRS, broadcast by the first CCC cell. After receiving the DRS of the first CCC cell, the terminal device measures the DRS of the first CCC cell to obtain the RSRP and RSRQ of the DRS of the first CCC cell.
  • a broadcast message such as a DRS
  • the information about the first CCC cell further includes access information of the first CCC cell.
  • the access information of the first CCC cell includes cell selection parameters of the first CCC cell.
  • the terminal device calculates S1 and S2 of the first CCC cell according to the above-mentioned RSRP and RSRQ of the DRS and the cell selection parameters of the first CCC cell. In a case where S1 and S2 of the first CCC cell satisfy S1>0 and S2>0, it is determined that the first CCC cell satisfies the foregoing cell selection criteria.
  • the terminal device determines to camp on the first CCC cell.
  • the terminal device determines not to camp on the first CCC cell.
  • the terminal device when the terminal device determines not to camp on the first CCC cell, the terminal device searches for the CCC cell whose CCC cell information includes the above indication information among the one or more CCC cells. If there is a second CCC cell that satisfies the cell selection criterion among the CCC cells that include the indication information in the information about the CCC cell, the terminal device determines to camp on the second CCC cell.
  • the terminal device may determine to camp on the above-mentioned BCC cell, or may search for the above-mentioned one or
  • the information of the CCC cells among the plurality of CCC cells does not include the third CCC cell of the indication information, and determine whether to camp on the third CCC cell according to the cell selection criterion.
  • the terminal device may determine that it can camp on the first CCC cell through the indication information carried in the information of the first CCC cell.
  • the above-mentioned first CCC cell is a cell determined by the network device as suitable for the terminal device to camp on, for example, the first CCC cell is in a low load state, or the first CCC cell receives less interference.
  • the terminal device can more accurately know a suitable cell that can be camped on, so that the terminal device camps on a suitable cell, so as to ensure the communication quality between the terminal device and the network device.
  • FIG. 9 is a schematic flowchart of another method for selecting a cell according to an embodiment of the present application. It can also be understood as a supplement or modification to the cell selection method in FIG. 8 above. As shown in Fig. 9, the cell selection method includes but not limited to the following steps.
  • step 901 The above BCC cell satisfies the cell selection criterion.
  • step 901 reference may be made to the relevant description of step 801, which will not be described in detail here.
  • step 902. Search for at least one CCC cell corresponding to the indication information. If the search is not over, then step 904 is indicated; if the search is over, then step 905 is executed.
  • the above indication information is included in the above broadcast message, and the above indication information is used to instruct the terminal device to camp on any one of the above at least one CCC cell.
  • the above-mentioned indication information may include the identification information of the at least one CCC cell, and the terminal device may determine that any of the at least one CCC cell that can camp on the above-mentioned at least one CCC cell one.
  • the broadcast message includes information about the at least one CCC cell, and the indication information may include at least one indication information.
  • the information of each CCC cell of the at least one CCC cell may include one indication information.
  • the terminal device determines that it can camp on any one of the at least one CCC cell according to the indication information carried in the information of the at least one CCC cell.
  • step 903. Whether a searched CCC cell satisfies a cell selection criterion. If yes, indicate step 904; if no, continue to execute step 902.
  • the terminal device After completing the search for the at least one CCC cell and determining that none of the at least one CCC cell satisfies the cell selection criterion, the terminal device determines to camp on the above BCC cell.
  • the broadcast information may further include the fourth CCC cell, and the information about the fourth CCC cell does not include the indication information.
  • the terminal device may continue to search for the fourth CCC cell, and determine whether to camp in the fourth CCC cell according to the cell selection criterion .
  • the above at least one CCC cell determines a suitable cell for the terminal device to camp on for the network device, for example, at least one CCC cell is in a low load state, or the at least one CCC cell receives less interference.
  • the terminal device can determine at least one CCC cell that can camp on through the indication information, and determine whether to camp on the at least one CCC cell according to the cell selection criteria, so that the terminal device camps on a suitable cell to ensure Communication quality between end devices and network devices.
  • the system information of a CCC cell is broadcast by its associated BCC cell.
  • the terminal device When the terminal device is performing cell reselection, if it searches for a CCC neighboring cell that meets the cell reselection criteria, it cannot directly reselect to the CCC neighboring cell, but needs to ensure that it can receive the broadcast of the BCC cell associated with the CCC neighboring cell information. After the terminal device determines that it can receive the broadcast message of the BCC cell associated with the CCC neighboring cell, it determines that it can reselect to the above CCC neighboring cell.
  • the embodiment of the present application provides a cell reselection method, which can quickly search for a BCC cell associated with a CCC neighbor cell.
  • FIG. 10 is a schematic flowchart of a cell reselection method provided in an embodiment of the present application. As shown in Fig. 10, the cell reselection method includes but not limited to the following steps.
  • a terminal device receives a broadcast message sent by a network device, where the broadcast message includes neighboring cell information of a serving cell, and the neighboring cell information includes information about a CCC cell and information about a BCC cell associated with the CCC cell.
  • the foregoing broadcast cell is broadcast by the serving cell of the terminal device.
  • the CCC cell is a neighboring cell of the serving cell of the terminal device
  • the BCC cell is a BCC cell associated with the CCC cell.
  • the information of the CCC cell includes an identifier of the CCC cell and a cell reselection parameter of the CCC cell.
  • the identity of the CCC cell may include the PCI or cell identity of the CCC cell, and the cell reselection parameters may include Q offset , Q offsettemp,n , Q hyst and Q offsettemp,s .
  • the above-mentioned information of the BCC cell includes an identifier of the BCC cell, such as a PCI or a cell identifier of the BCC cell.
  • the above-mentioned information of the BCC cell may also include the channel number of the BCC cell.
  • the terminal device determines to reselect to the CCC cell according to the information of the BCC cell and a cell reselection criterion.
  • the above-mentioned cell reselection criteria include: within a specified time interval, if the R value of the same-frequency neighbor cell with the largest R value remains greater than the R value of the serving cell, reselect to the above-mentioned R value.
  • the same-frequency neighbor cell with the largest value is the same-frequency neighbor cell with the largest value.
  • the above cell reselection criteria include: within the specified time interval, if the R value of the same priority and different frequency neighbor cell with the largest R value remains greater than the R value of the serving cell, then reselect to The same-priority inter-frequency neighboring cell with the largest R value above.
  • the above cell reselection criteria include: within a specified time interval, if the S1 of the broadcast message of a low-priority inter-frequency neighboring cell remains greater than the threshold value Th x,low,p , and The S1 of the serving cell is less than the threshold value Th s,low,p , or the S2 of the broadcast message of the low-priority inter-frequency neighboring cell remains greater than the threshold value Th x,low,q , and the S2 of the serving cell is less than the threshold value Th s,low,q , it is determined to reselect to the low-priority inter-frequency neighbor cell.
  • the above cell reselection criteria include: within a specified time interval, if the S1 of the broadcast message of a high-priority inter-frequency neighboring cell remains greater than the threshold value Th x,high,p , or If the S2 of the high-priority inter-frequency neighboring cell remains greater than the threshold value Th x,high,q , then the high-priority inter-frequency neighboring cell is reselected.
  • the above cell reselection criterion is only an example. With the evolution of standard technology, the cell reselection criterion may change. In this case, it is also applicable to the method provided in the embodiment of the present application. Therefore, the cell reselection criteria shown above should not be construed as limiting the implementation of this application.
  • the terminal device since the above-mentioned CCC cell only broadcasts DRS, and the system information of the CCC cell is broadcast by the above-mentioned BCC cell, to reselect the above-mentioned CCC cell, the terminal device needs to ensure that it can receive the broadcast message broadcast by the BCC cell, and the broadcast message broadcast by the BCC cell
  • the broadcast message includes system information of the above CCC cell.
  • the terminal device determines whether to reselect to the CCC cell according to the information of the BCC cell and the cell reselection criterion.
  • the above-mentioned determination of reselection to the CCC cell based on the information of the BCC cell and the cell reselection criteria includes but is not limited to the following steps:
  • the information of the CCC cell includes an identifier of the CCC cell, a frequency channel number, and a cell reselection parameter of the CCC cell.
  • the terminal device searches for a CCC cell according to the information of the CCC cell, for example, searches for a cell whose cell ID is the cell ID of the CCC cell on a channel corresponding to the channel number of the CCC cell. If the terminal device searches for a cell whose cell identifier is the cell identifier of the CCC cell on the frequency channel, it determines that the CCC cell is found.
  • the terminal device searches for the above CCC cell, that is, the terminal device receives a broadcast message, such as a DRS, broadcast by the CCC cell. After receiving the DRS of the CCC cell, the terminal device measures the DRS of the CCC cell to obtain the RSRP and RSRQ of the DRS of the CCC cell.
  • a broadcast message such as a DRS
  • the terminal device determines whether the above-mentioned CCC cell satisfies the above-mentioned cell reselection criterion according to the RSRP and RSRQ of the DRS of the above-mentioned CCC cell and the above-mentioned cell reselection parameters.
  • the terminal device searches for the BCC cell according to the information of the BCC cell.
  • the information of the BCC cell includes an identifier of the BCC cell and/or a channel number of the BCC cell.
  • the terminal device searches for the BCC cell according to the information of the BCC cell, for example, searches for a cell whose cell ID is the cell ID of the BCC cell on a channel corresponding to the channel number of the BCC cell. If the terminal device searches for a cell whose cell identifier is the cell identifier of the BCC cell on the above frequency channel, it determines that the BCC cell is found.
  • the information of the BCC cell above includes the identity of the BCC cell and/or the channel number of the BCC cell, and the terminal device can quickly search for the above BCC cell according to the identity of the BCC cell or the channel number of the BCC cell, thereby reducing the number of BCC cells. Cell search time.
  • the terminal device finds the above-mentioned BCC cell, that is, when the terminal device receives the broadcast message of the above-mentioned BCC cell, it determines to reselect to the above-mentioned CCC cell. After the terminal device searches for the BCC cell, if it obtains the system information of the CCC cell from the broadcast message of the BCC cell, it reselects to the CCC cell.
  • the terminal device since the system information of the above-mentioned CCC cell is broadcast by the above-mentioned BCC cell, the terminal device needs to confirm that the above-mentioned BCC cell is found before determining to reselect to the CCC cell.
  • the terminal device searches for a CCC cell according to the information of the above CCC cell.
  • the CCC cell meets the cell reselection criteria, it searches for a BCC cell according to the information of the above BCC cell. If the above BCC cell is found, the terminal device determines to reselect to the CCC community.
  • the terminal device searches for the CCC cell and the BCC cell respectively according to the information of the above-mentioned CCC cell and the above-mentioned BCC cell, and can quickly search for the above-mentioned CCC cell and BCC cell, reducing the search time of the CCC cell and BCC cell, thereby improving the efficiency of cell reselection .
  • the above determination to reselect to the CCC cell includes the following steps:
  • the reference signal received power RSRP of the BCC cell is greater than a first threshold and the reference signal received quality RSRQ of the BCC cell is greater than a second threshold, it is determined to reselect to the CCC cell.
  • the terminal device finds the above-mentioned BCC cell, that is, the terminal device receives the broadcast message of the above-mentioned BCC cell.
  • the first threshold is a threshold value of RSRP of the broadcast message of the BCC cell
  • the second threshold is a threshold value of RSRQ of the broadcast message of the BCC cell.
  • the terminal device measures the broadcast message of the BCC cell to obtain the RSRP and RSRQ of the broadcast message of the BCC cell.
  • the terminal device can obtain the system information of the CCC cell from the above broadcast message.
  • the terminal device determines to reselect to the CCC cell.
  • the BCC cell when the reference signal received power RSRP of the broadcast message of the BCC cell is greater than a first threshold and the reference signal reception quality RSRQ of the broadcast message of the BCC cell is greater than a second threshold, the BCC cell satisfies the cell selection criterion, That is, S1 and S2 of the above-mentioned BCC cell satisfy S1>0 and S2>0.
  • S1 and S2 of the BCC cell refer to the relevant description of the aforementioned cell selection.
  • the above broadcast message of the BCC cell includes cell reselection parameters of the BCC cell.
  • the foregoing first threshold and second threshold may be determined by cell selection parameters of the BCC cell.
  • the above-mentioned first threshold may be the sum of Q rxlevmin , Q rxlevminoffset , P compensation and Q offsettemp .
  • the above second threshold may be the sum of Q qualmin , Q qualminoffset and Q offsetttemp .
  • the system information of the above CCC cell is broadcast by the above BCC cell.
  • the terminal device can obtain the system information of the CCC cell from the broadcast message of the BCC cell , the terminal device determines to reselect to the above CCC cell, so as to ensure smooth progress of cell reselection.
  • the above-mentioned CCC cell meeting the above-mentioned cell reselection criteria may include the following situations:
  • Case 1 When the CCC cell is an intra-frequency neighbor cell of the serving cell, the CCC cell satisfies the cell reselection criteria, including:
  • the CCC cell is the cell with the largest R value among the same-frequency neighboring cells of the serving cell; and the duration of the CCC cell's R value greater than the R value of the serving cell is greater than or equal to the first duration;
  • the R value of the CCC cell is determined according to the Reference Signal Received Power RSRP of the CCC cell
  • the R value of the serving cell is determined according to the RSRP of the serving cell
  • the above-mentioned first duration may be a duration configured by the network device, or may be a duration specified by a protocol.
  • Qs is the RSRP of the SSB of the serving cell
  • Q hyst is the hysteresis of the serving cell
  • Q offsettemp,s is the offset of the serving cell.
  • the above-mentioned broadcast message is broadcast by the serving cell
  • the above-mentioned Qs may be the RSRP of the above-mentioned broadcast message, that is, the above-mentioned Qs may be obtained by measuring the above-mentioned broadcast message by the terminal device.
  • the above-mentioned Qn is the RSRP of the DRS of the above-mentioned CCC cell
  • Q off set is the offset of the above-mentioned CCC cell relative to the serving cell
  • Q offsettemp,n is the offset of the above-mentioned CCC cell.
  • Q offset and Q offsettemp,n are included in the system information of the serving cell.
  • the above broadcast message includes information of multiple same-frequency neighboring cells of the serving cell.
  • the terminal device searches the multiple same-frequency neighboring cells according to the information of the multiple same-frequency neighboring cells, and calculates the R value of the multiple same-frequency neighboring cells according to the calculation formula of the R value of the CCC cell.
  • the above-mentioned CCC cell is the cell with the largest R value among the above-mentioned multiple same-frequency neighboring cells.
  • the terminal device After calculating the R value of the CCC cell and the R value of the serving cell, the terminal device determines that the CCC cell satisfies The above cell reselection criteria.
  • the CCC cell is the cell with the largest R value in the same priority and different frequency adjacent cells of the serving cell, and the duration of the R value of the CCC cell is greater than the R value of the serving cell is greater than or equal to the second duration;
  • the R value of the CCC cell is determined according to the reference signal received power RSRP of the CCC cell and the offset of the CCC cell
  • the R value of the serving cell is determined according to the RSRP of the serving cell, the The offset and hysteresis of the serving cell are determined.
  • the above-mentioned second duration may be a duration configured by the network device, or may be a duration specified by a protocol.
  • Qs is the RSRP of the SSB of the serving cell
  • Q hyst is the hysteresis of the serving cell
  • Q offsettemp,s is the offset of the serving cell.
  • the above-mentioned broadcast message is broadcast by the serving cell
  • the above-mentioned Qs may be the RSRP of the above-mentioned broadcast message, that is, the above-mentioned Qs may be obtained by measuring the above-mentioned broadcast message by the terminal device.
  • the above-mentioned Qn is the RSRP of the DRS of the above-mentioned CCC cell
  • Q offset is the offset of the above-mentioned CCC cell relative to the serving cell
  • Q offsettemp,n is the offset of the above-mentioned CCC cell.
  • Q offset and Q offsettemp,n are included in the system information of the serving cell.
  • the above broadcast message includes information of multiple neighboring cells of the same priority and different frequencies of the serving cell.
  • the terminal device searches the above-mentioned multiple same-priority and different-frequency neighboring cells according to the information of the above-mentioned multiple same-priority and different-frequency neighboring cells, and calculates the above-mentioned multiple same-priority and different-frequency neighboring cells according to the calculation formula of the R value of the CCC cell.
  • R value The above-mentioned CCC cell is the cell with the largest R value among the above-mentioned multiple same-priority and different-frequency neighboring cells.
  • the terminal device After calculating the R value of the CCC cell and the R value of the serving cell, the terminal device determines that the CCC cell satisfies the requirement of the above cell Reselect criteria.
  • Case 3 When the CCC cell is a low-priority inter-frequency neighbor cell of the serving cell, the CCC cell satisfies the cell reselection criteria, including:
  • the duration for which the RSRP of the CCC cell is greater than a third threshold and the RSRP of the serving cell is less than a fourth threshold is greater than or equal to a third duration
  • a duration in which the reference signal reception quality RSRQ of the CCC cell is greater than a fifth threshold and the RSRQ of the serving cell is less than a sixth threshold is greater than or equal to a fourth duration.
  • the third duration may be a duration configured by the network device, or may be a duration specified by a protocol
  • the fourth duration may be a duration configured by the network device, or may be a duration specified by a protocol.
  • the above-mentioned third duration and the above-mentioned fourth duration may be equal.
  • the third threshold is the cell reselection threshold of the RSRP of the broadcast message (for example, DRS) of the CCC cell.
  • the fourth threshold is the cell reselection threshold of the RSRP of the broadcast message (for example, DRS or SSB) of the serving cell.
  • the third time period if the RSRP of the DRS of the CCC cell remains greater than the third threshold, and the RSRP of the broadcast message of the serving cell remains smaller than the fourth threshold, then it is determined that the CCC cell satisfies the cell reselection criterion.
  • the length of the third time period is greater than or equal to the third time period.
  • the starting moment of the third time period may be the moment when the terminal device searches for the CCC cell.
  • the fifth threshold is the cell reselection threshold of the RSRQ of the broadcast message (for example, DRS) of the CCC cell.
  • the sixth threshold is the cell reselection threshold of the RSRQ of the broadcast message (for example, DRS or SSB) of the serving cell.
  • the length of the fourth time period is greater than or equal to the fourth time period.
  • the start time of the fourth time period may be the time when the terminal device searches for the CCC cell.
  • the CCC cell satisfies at least one of the following two conditions:
  • Th s,low,p , Th x,low,p , Th s,low,q , Th x,low,q represent corresponding threshold values, and these parameters may be included in the above broadcast message.
  • the third threshold may be determined by the cell reselection parameter of the CCC cell.
  • the cell reselection parameters of the CCC cell are included in the information of the CCC cell, and the cell reselection parameters of the CCC cell include Q rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp and Th x,low,p .
  • the S1 of the above-mentioned CCC cell is greater than Th x,low,p , that is, the RSRP of the CCC cell is greater than the sum of Q rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp and Th x,low,p of the CCC cell, and the above-mentioned third threshold can be Q The sum of rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp and Th x,low,p .
  • the fourth threshold may be determined by a cell selection parameter of the serving cell.
  • the cell reselection parameters of the serving cell may be included in the broadcast message.
  • the above cell reselection parameters of the serving cell include Q rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp and Th s,low,p .
  • the above S1 of the serving cell is smaller than Th s,low,p , that is, the RSRP of the serving cell is smaller than Q rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp and Th s,low,p of the serving cell.
  • the fourth threshold may be the sum of Q rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp and Th s,low,p of the serving cell.
  • the fifth threshold may be determined by the cell reselection parameter of the CCC cell.
  • the above cell reselection parameters of the CCC cell may also include Q qualmin , Q qualminoffset , Q offsettemp and Th x,low,q of the CCC cell.
  • the S2 of the above CCC cell is greater than Th x,low,q in the fourth time period, that is, the RSRQ of the CCC cell is greater than the sum of Q qualmin , Q qualminoffset , Q offsetttemp and Th x,low,q in the fourth time period.
  • the above fifth threshold may be the sum of Q qualmin , Q qualminoffset , Q offsettemp and Th x,low,q .
  • the sixth threshold may be determined by the cell reselection parameters of the serving cell, and the cell reselection parameters of the serving cell may also include Q qualmin , Q qualminoffset , Q offsettemp and Th s,low,q of the serving cell.
  • the aforementioned serving cell is smaller than Th s,low,q , that is, the RSRQ of the serving cell is smaller than the sum of Q qualmin , Q qualminoffset , Q offsetttemp and Th s,low,q .
  • the above sixth threshold may be the sum of Q qualmin , Q qualminoffset , Q offsettemp and Th s,low,q .
  • the duration for which the RSRP of the CCC cell is greater than the seventh threshold is greater than or equal to the fifth duration
  • the duration during which the RSRQ of the CCC cell is greater than the eighth threshold is greater than or equal to the sixth duration.
  • the fifth duration may be a duration configured by the network device, or may be a duration specified by a protocol.
  • the above-mentioned sixth duration may be a duration configured by a network device, or may be a duration specified by a protocol.
  • the seventh threshold is the threshold value of the RSRP of the DRS of the CCC cell.
  • the CCC cell is a high-priority inter-frequency neighbor cell of the serving cell
  • the length of the fifth time period is greater than or equal to the fifth time period.
  • the starting time of the fifth time period may be the time when the terminal device searches for the CCC cell.
  • the eighth threshold is the threshold value of the RSRQ of the DRS of the CCC cell.
  • the CCC cell is a high-priority inter-frequency neighboring cell of the serving cell
  • the length of the sixth time period is greater than or equal to the sixth time period.
  • the start time of the sixth time period may be the time when the terminal device searches for the CCC cell.
  • the above-mentioned CCC cell satisfies one of the following conditions:
  • Condition 1 The CCC cell maintains S1>Th x,high,p within the fifth time period
  • the seventh threshold may be determined by the cell reselection parameter of the CCC cell.
  • the cell reselection parameters of the CCC cell are included in the information of the CCC cell, and the cell reselection parameters of the CCC cell include Q rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp and Th x,high,p .
  • the above CCC cell keeps S1 greater than Th x,high,p in the fifth time period, that is, the RSRP of the CCC cell is greater than Q rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp and Th x,high in the fifth time period of the CCC cell , p
  • the above-mentioned seventh threshold may be the sum of Q rxlevmin , Q rxlevminoffset , P compensation , Q offsetttemp and Th x,high,p .
  • the above-mentioned eighth threshold may be determined by the above-mentioned cell reselection parameter of the CCC cell.
  • the above cell reselection parameters of the CCC cell may also include Q qualmin , Q qualminoffset , Q offsettemp and Th x,high,q of the CCC cell.
  • the S2 of the above CCC cell is greater than Th x,high,q in the sixth time period, that is, the RSRQ of the CCC cell is greater than the sum of Q qualmin , Q qualminoffset , Q offsetttemp and Th x,high,q in the sixth time period.
  • the above fifth threshold may be the sum of Q qualmin , Q qualminoffset , Q offsettemp and Th x,high,q .
  • the above-mentioned broadcast message includes neighboring cell information of the serving cell, and the neighboring cell information includes information of a CCC cell and information of a BCC cell associated with the CCC cell, and the aforementioned CCC cell is a neighboring cell of the serving cell.
  • the terminal device can quickly determine the BCC cell associated with the CCC cell according to the information of the BCC cell, thereby improving the efficiency of cell reselection.
  • FIG. 11 is a schematic flowchart of another cell reselection method provided by the embodiment of the present application. As shown in Fig. 11, the cell reselection method includes but not limited to the following steps.
  • a terminal device receives a broadcast message sent by a network device, where the broadcast message includes neighboring cell information of a serving cell.
  • the foregoing broadcast message is broadcast by the serving cell of the terminal device.
  • the neighboring cell information includes information of at least one neighboring cell of the serving cell.
  • the terminal device may search and measure the at least one neighboring cell according to the information of the at least one neighboring cell, so as to perform cell reselection.
  • the above cell reselection criterion may refer to the relevant description in FIG. 10 .
  • the first neighboring cell is a neighboring cell satisfying the cell reselection criterion among the at least one neighboring cell.
  • the information of any one of the multiple neighboring cells includes the cell identity of the neighboring cell and the cell reselection parameters of the neighboring cell.
  • the terminal device searches and measures the neighbor cell according to the identity of each neighbor cell of the at least one neighbor cell, and determines whether the neighbor cell satisfies the cell reselection criterion according to the cell reselection parameter of the neighbor cell.
  • the above-mentioned first neighboring cell satisfies the cell reselection criterion may refer to the relevant description of the CCC cell satisfying the cell reselection criterion described in FIG. 10 .
  • the first neighboring cell is a CCC cell
  • search for a BCC cell associated with the first neighboring cell If the first neighboring cell is a CCC cell, search for a BCC cell associated with the first neighboring cell.
  • the terminal device needs to determine that it can receive the broadcast message of the BCC cell associated with the first neighboring cell, so as to obtain the system information of the first neighboring cell. Therefore, in the case that the above-mentioned first neighboring cell is a CCC cell, the terminal device searches for the above-mentioned BCC cell according to the information of the above-mentioned BCC cell. After receiving the broadcast message of the BCC cell and obtaining the system information of the first neighboring cell from the broadcast message of the BCC cell, the terminal device determines to reselect to the first neighboring cell.
  • the information of the first neighboring cell further includes information of a BCC cell associated with the first neighboring cell.
  • the terminal device searches for the BCC cell according to the information of the BCC cell.
  • the above-mentioned information of the BCC cell includes an identifier of the BCC cell, a frequency channel number, and a cell reselection parameter of the above-mentioned CCC cell.
  • the terminal device searches for the BCC cell according to the information of the BCC cell, for example, searches for a cell whose cell ID is the cell ID of the BCC cell on a channel corresponding to the channel number of the BCC cell. If the terminal device searches for a cell whose cell identifier is the cell identifier of the BCC cell on the above frequency channel, it determines that the BCC cell is found.
  • the reference signal received power RSRP of the BCC cell is greater than the ninth threshold and the reference signal received quality RSRQ of the BCC cell is greater than the tenth threshold, it is determined that a BCC cell is found.
  • the ninth threshold is the threshold value of RSRP of the broadcast message of the BCC cell
  • the tenth threshold is the threshold value of RSRQ of the broadcast message of the BCC cell.
  • the terminal device determines that the BCC cell has been searched.
  • the BCC cell satisfies the cell selection criterion, That is, S1 and S2 of the above-mentioned BCC cell satisfy S1>0 and S2>0.
  • S1 and S2 of the BCC cell refer to the relevant description of the aforementioned cell selection.
  • the above broadcast message of the BCC cell includes cell reselection parameters of the BCC cell.
  • the foregoing ninth threshold and tenth threshold may be determined by cell selection parameters of the BCC cell.
  • the above ninth threshold may be the sum of Q rxlevmin , Q rxlevminoffset , P compensation and Q offsettemp .
  • the above tenth threshold may be the sum of Q qualmin , Q qualminoffset and Q offsetttemp .
  • the terminal device searches for the BCC cell, that is, after receiving the broadcast message of the BCC cell, it obtains the system information of the first neighbor cell from the broadcast message of the BCC cell, and determines to reselect to the first neighbor cell. district.
  • the terminal device before determining to reselect to the first neighboring cell, the terminal device also needs to determine that the first neighboring cell satisfies the network belonging criterion and the cell availability criterion.
  • the terminal device determines to reselect to the first neighboring cell when determining that the first neighboring cell satisfies the network belonging criterion and the cell availability criterion.
  • the terminal device determines not to reselect to the above-mentioned first neighboring cell.
  • the terminal device determines to reselect to the foregoing first neighboring cell.
  • the system information of the first neighboring cell is broadcast by the first neighboring cell, so the terminal device can directly reselect to the first neighboring cell.
  • the broadcast message includes information of multiple neighboring cells of the serving cell
  • the terminal device searches and measures the neighboring cells of the serving cell, and determines the first neighboring cell that satisfies the cell reselection condition from the multiple neighboring cells. district.
  • the information of the first neighboring cell includes the information of the BCC cell associated with the first neighboring cell.
  • the terminal device can quickly determine the BCC cell associated with the first neighboring cell according to the information of the BCC cell, reduce the search time of the BCC cell, and improve the efficiency of cell reselection.
  • FIG. 12 is a schematic flow chart of another cell reselection method provided in the embodiment of the present application, which can also be understood as a supplement or modification of the above cell reselection method in FIG. 11 .
  • the cell reselection method can be applied in the same-frequency cell reselection process, as shown in FIG. 12 , the cell reselection method includes but is not limited to the following steps.
  • the at least one same-frequency neighboring cell is a same-frequency neighboring cell of the serving cell of the terminal device.
  • the terminal device may receive a broadcast message of the serving cell, where the broadcast message carries the information of the at least one same-frequency neighboring cell.
  • the terminal device searches for the at least one same-frequency neighboring cell according to the information of the at least one same-frequency neighboring cell. For each searched neighboring cell of the same frequency, the terminal device measures the signal strength of the neighboring cell of the same frequency, for example, measures RSRP and RSRQ of broadcast messages of the neighboring cell of the same frequency.
  • the terminal device sorts the at least one intra-frequency neighboring cell according to the cell reselection priority.
  • the above cell reselection priority may be represented by the R value of the cell.
  • the terminal device searches for at least one same-frequency neighboring cell, and calculates the R value of each same-frequency neighboring cell.
  • the calculation of the R value of the same-frequency adjacent cell can refer to the above, and will not be described in detail here.
  • the terminal device After calculating the R value of each same-frequency neighboring cell, the terminal device sorts the at least one same-frequency neighboring cell according to the R value.
  • step 1204 Whether the first intra-frequency neighboring cell satisfies a cell reselection criterion. If yes, execute step 1204; if no, continue to execute step 1201.
  • the first same-frequency neighboring cell is the same-frequency neighboring cell with the largest R value among the at least one same-frequency neighboring cell.
  • the first intra-frequency neighboring cell is a CCC cell. If yes, go to step 1205; if not, go to step 1207.
  • the information of the first same-frequency neighboring cell includes information of a BCC cell associated with the first same-frequency neighboring cell.
  • the terminal device searches for the BCC cell according to the information of the BCC cell.
  • the information of the first same-frequency neighboring cell includes information of the BCC cell associated with the first same-frequency neighboring cell.
  • the terminal device can quickly determine the BCC cell associated with the first intra-frequency neighbor cell according to the information of the BCC cell, reduce the search time of the BCC cell, and improve the efficiency of cell reselection.
  • FIG. 13 is a schematic flowchart of another cell reselection method provided by the embodiment of the present application, which can also be understood as a supplement or modification of the above cell reselection method in FIG. 11 .
  • the cell reselection method can be applied in the inter-frequency cell reselection process, as shown in FIG. 13 , the cell reselection method includes but not limited to the following steps.
  • the inter-frequency adjacent cell is an inter-frequency adjacent cell of the serving cell.
  • the message broadcast by the serving cell includes the information of the inter-frequency neighboring cell, and the terminal device can obtain the above-mentioned information of the inter-frequency neighboring cell through the broadcast message broadcast by the serving cell.
  • step 1302. Whether the inter-frequency neighboring cell satisfies a cell reselection criterion. If yes, execute step 1303; if not, continue to execute step 1301.
  • step 1303. Whether the inter-frequency neighboring cell is a CCC cell. If yes, go to step 1304; if not, go to step 1306.
  • the information of the inter-frequency neighboring cell includes the above-mentioned information of the BCC cell.
  • the terminal device can quickly search for the above-mentioned BCC cell according to the information of the above-mentioned BCC cell.
  • the information of the inter-frequency neighboring cell includes the information of the BCC cell associated with the inter-frequency neighboring cell.
  • the terminal device can quickly determine the BCC cell associated with the above-mentioned inter-frequency neighboring cell according to the information of the above-mentioned BCC cell, and reduce the search time of the BCC cell, thereby improving the efficiency of cell reselection.
  • the present application divides the communication device into functional modules according to the above method embodiments.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in this application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.
  • the communication device according to the embodiment of the present application will be described in detail below with reference to FIG. 14 to FIG. 16 .
  • FIG. 14 is a schematic structural diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 14 , the communication device 140 includes a processing module 1401 and a transceiver module 1402 .
  • the communication device may be the terminal device shown above. That is, the communication device shown in FIG. 14 may be used to perform the steps or functions performed by the terminal device in the above method embodiments.
  • the transceiver module 1402 is configured to receive a broadcast message, where the broadcast message includes indication information, and the indication information is used to indicate to camp on a first CCC cell, and the first CCC cell is associated with a BCC cell
  • the CCC cell, the BCC cell is a BCC cell that meets the cell selection criteria searched by the terminal device;
  • the processing module 1401 is configured to determine whether to camp on the first CCC cell according to the indication information and the cell selection criterion.
  • the processing module 1401 is specifically configured to determine not to camp on the first CCC cell if the first CCC cell does not meet the cell selection criterion; or, if the first CCC cell meets the cell selection criteria In the case of the cell selection criterion, determine to camp on the first CCC cell.
  • the processing module 1401 is further configured to determine to camp on the BCC cell when it is determined not to camp on the first CCC cell.
  • the transceiver module 1402 is specifically configured to receive the broadcast message when the BCC cell is in a high load state.
  • the transceiver module 1402 is configured to receive a broadcast message, where the broadcast message includes neighboring cell information of the serving cell, and the neighboring cell information includes information of a CCC cell and an associated BCC cell of the CCC cell Information;
  • the processing module 1401 is configured to determine to reselect to the CCC cell according to the information of the BCC cell and a cell reselection criterion.
  • the processing module 1401 is specifically configured to search for the CCC cell according to the information of the CCC cell; if the CCC cell satisfies the cell reselection criterion, search for the CCC cell according to the information of the BCC cell BCC cell: if the BCC cell is found, determine to reselect to the CCC cell.
  • the transceiver module 1402 can also be used to execute step 501, step 601, step 701, step 801, step 901, step 1001, and step 1101, and the processing module 1401 can also be used to execute step 502, step 602, step 603, Step 604, step 702, step 703, step 704, step 705, step 706, step 802, step 803, step 902, step 903, step 904, step 905, step 1002, step 1102, step 1103 and step 1104.
  • the processing module 1401 may be one or more processors, and the transceiver module 1402 may be a transceiver.
  • the processing module 1401 may be one or more processors (or the processing module 1401 may be one or more logic circuits), and the transceiver module 1402 may be an input/output interface. Details will be given below.
  • the processing module 1401 may be one or more processors, and the transceiver module 1402 may be a transceiver.
  • the processor and the transceiver may be coupled, and the connection manner of the processor and the transceiver is not limited in the embodiment of the present application.
  • the communication device 150 includes one or more processors 1501 and transceivers 1502 .
  • the transceiver 1502 is used to receive broadcast messages.
  • the processor 1501 is configured to determine whether to camp on the first CCC cell according to the indication information included in the broadcast message and the cell selection criterion.
  • the transceiver 1502 is used to receive a broadcast message
  • the processor 1501 is used to determine the reselection according to the broadcast message to the CCC community.
  • the transceiver may include a receiver and a transmitter, the receiver is used to perform a function (or operation) of reception, and the transmitter is used to perform a function (or operation) of transmission ). And the transceiver is used to communicate with other devices/devices through the transmission medium.
  • the communication device 150 may further include one or more memories 1503 for storing program instructions and/or data.
  • the memory 1503 is coupled to the processor 1501.
  • the coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1501 may cooperate with the memory 1503 .
  • the processor 1501 can execute program instructions stored in the memory 1503 .
  • at least one of the above one or more memories may be included in the processor.
  • a specific connection medium among the transceiver 1502, the processor 1501, and the memory 1503 is not limited.
  • the memory 1503, the processor 1501, and the transceiver 1502 are connected through a bus 1504.
  • the bus is represented by a thick line in FIG. 15, and the connection between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 15 , 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, etc., and may realize Or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.
  • the memory may include but not limited to hard disk drive (hard disk drive, HDD) or solid-state drive (solid-state drive, SSD) and other non-volatile memory, random access memory (Random Access Memory, RAM), Erasable Programmable ROM (EPROM), Read-Only Memory (ROM) or Portable Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM), etc.
  • the memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures, and can be read and/or written by a computer (such as the communication device shown in this application, etc.), but is not limited thereto.
  • the memory in the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, and is used for storing program instructions and/or data.
  • the processor 1501 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of the software programs.
  • the memory 1503 is mainly used to store software programs and data.
  • the transceiver 1502 may include a control circuit and an antenna, and the control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • the processor 1501 can read the software program in the memory 1503, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 1501 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1501, and the processor 1501 converts the baseband signal into data and processes the data deal with.
  • the radio frequency circuit and the antenna can be set independently from the processor for baseband processing.
  • the radio frequency circuit and antenna can be arranged remotely from the communication device. .
  • the communication device shown in the embodiment of the present application may have more components than those shown in FIG. 15 , which is not limited in the embodiment of the present application.
  • the method performed by the processor and the transceiver shown above is only an example, and for the specific steps performed by the processor and the transceiver, reference may be made to the method introduced above.
  • the processing module 1401 may be one or more logic circuits, and the transceiver module 1402 may be an input/output interface.
  • the input-output interface is also called a communication interface, or an interface circuit, or an interface, or the like.
  • the communication device shown in FIG. 16 includes a logic circuit 1601 and an interface 1602 . That is, the above-mentioned processing module 1401 can be realized by a logic circuit 1601 , and the transceiver module 1402 can be realized by an interface 1602 .
  • the logic circuit 1601 may be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc.
  • the interface 1602 may be a communication interface, an input/output interface, or a pin.
  • FIG. 16 takes the aforementioned communication device as a chip as an example, and the chip includes a logic circuit 1601 and an interface 1602 .
  • the logic circuit and the interface may also be coupled to each other.
  • the embodiment of the present application does not limit the specific connection manner of the logic circuit and the interface.
  • the interface 1602 is used to receive broadcast messages.
  • the logic circuit 1601 is configured to determine whether to camp on the first CCC cell according to the indication information contained in the broadcast message and the cell selection criterion.
  • the interface 1602 when the communication device is used to execute the method or function or steps performed by the terminal device, the interface 1602 is used to receive a broadcast message.
  • the communication device shown in the embodiment of the present application may implement the method provided in the embodiment of the present application in the form of hardware, or may implement the method provided in the embodiment of the present application in the form of software, which is not limited in the embodiment of the present application.
  • the present application further provides a computer program, which is used to implement the operations and/or processing performed by the first communication device in the method provided in the present application.
  • the present application also provides a computer program, which is used to implement the operations and/or processing performed by the second communication device in the method provided in the present application.
  • the present application also provides a computer-readable storage medium, where computer code is stored in the computer-readable storage medium, and when the computer code is run on the computer, the computer is made to perform the operations performed by the first communication device in the method provided by the present application and/or processing.
  • the present application also provides a computer-readable storage medium, where computer code is stored in the computer-readable storage medium, and when the computer code is run on the computer, the computer is made to perform the operations performed by the second communication device in the method provided by the present application and/or processing.
  • the present application also provides a computer program product.
  • the computer program product includes computer code or computer program.
  • the operations performed by the first communication device in the method provided by the present application and the /or processing is performed.
  • the present application also provides a computer program product.
  • the computer program product includes computer code or computer program.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to realize the technical effects of the solutions provided by the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the storage medium includes several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned readable storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk, etc., which can store program codes. medium.

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Abstract

本申请实施例提供一种小区选择方法、小区重选方法及通信装置，该小区选择方法包括：接收广播消息，所述广播消息包括指示信息，所述指示信息用于指示驻留第一CCC小区，所述第一CCC小区为与BCC小区关联的CCC小区，所述BCC小区为终端设备搜索到的满足小区选择准则的BCC小区；根据所述指示信息及所述小区选择准则确定是否驻留所述第一CCC小区。通过指示信息能够指示终端设备选择合适的小区进行驻留。

Description

小区选择方法、小区重选方法及通信装置
本申请要求于2021年12月01日提交中国专利局、申请号为202111456379.3、申请名称为“小区选择方法、小区重选方法及通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种小区选择方法、小区重选方法及通信装置。
背景技术
在多载波网络的节能架构中，载波可以分为基础载波(basic component carrier，BCC)与容量载波(capacity component carrier，CCC)，BCC小区广播本小区的同步信号块(synchronization signal block，SSB)和系统信息(system information，SI)的同时，还广播CCC小区的SI。CCC小区不广播SI，只广播探测参考信号(discovery reference signal，DRS)。
终端设备在第一次接入网络时需要选择满足小区选择准则的小区进行驻留，即终端设备在第一次接入网络时需要进行小区选择。示例性地，在终端设备搜索到一个BCC小区且该BCC小区满足小区选择准则的情况下，终端设备可以直接选择该BCC小区驻留，也可以选择该BCC小区关联的CCC小区驻留。因此，终端设备如何选择合适的小区驻留是亟需解决的问题。
发明内容
本申请实施例公开了一种小区选择方法、小区重选方法及通信装置，能够选择合适的小区驻留。
第一方面，本申请实施例提供一种小区选择方法，包括：
接收广播消息，所述广播消息包括指示信息，所述指示信息用于指示驻留第一CCC小区，所述第一CCC小区为与BCC小区关联的CCC小区，所述BCC小区为终端设备搜索到的满足小区选择准则的BCC小区；根据所述指示信息及所述小区选择准则确定是否驻留所述第一CCC小区。
在本申请实施例中，终端设备通过接收广播消息可以明确获知其可以驻留第一CCC小区，从而有效改善了终端设备驻留到其他小区如BCC小区但是该BCC小区负载过重的情况，使得该终端设备可以驻留到合适的小区。需要说明的是，该指示信息指示终端设备可以驻留到第一CCC小区，至于该终端设备是否驻留该第一CCC小区，则可以根据小区选择准则进一步确定。
在本申请实施例中，上述广播消息由与终端设备通信的网络设备发送。终端设备根据接收到的广播消息中包括的指示信息以及小区选择准则确定是否驻留第一CCC小区。若第一CCC小区满足小区选择准则，则确定驻留第一CCC小区。网络设备通过指示信息指示终端设备驻留第一CCC小区，能够指示终端设备选择合适的小区驻留。
在第一方面的一种可能实施方式中，所述第一CCC小区为所述BCC小区关联的一个或多个CCC小区中的任一个。
在本申请实施例中，终端设备通过接收到的广播消息确定可以驻留与上述BCC小区关联的一个或多个CCC小区中的任一个CCC小区。终端设备可以搜索上述一个或多个CCC小区，并选择上述一个或多个CCC小区中满足小区选择准则的CCC小区进行驻留，从而减轻了BCC小区的负载。
在第一方面的一种可能实施方式中，所述指示信息包括所述第一CCC小区的标识信息。
在本申请实施例中，终端设备通过在指示信息中携带第一CCC小区的标识信息确定可以驻留第一CCC小区。可以理解的是，上述第一CCC小区为网络设备确定的适合终端设备驻留的小区，例如第一CCC小区处于低负载状态，或者第一CCC小区所受的干扰较小。终端设备通过指示信息中携带的CCC小区的标识信息可以更精确地获知合适的、可以驻留的小区，使得终端设备驻留到合适的小区，以保证终端设备与网络设备之间的通信质量。
在第一方面的一种可能实施方式中，所述广播消息包括指示信息，包括：
所述广播消息包括第一CCC小区的信息，所述指示信息包含在所述第一CCC小区的信息中。
在本申请实施例中，终端设备可以通过第一CCC小区的信息中携带的指示信息确定可以驻留第一CCC小区。可以理解的是，上述第一CCC小区为网络设备确定适合终端设备驻留的小区，例如第一CCC小区处于低负载状态，或者第一CCC小区所受的干扰较小。终端设备通过在CCC小区的信息中携带指示信息可以更精确地获知合适的、可以驻留的小区，使得终端设备驻留到合适的小区，以保证终端设备与网络设备之间的通信质量。
在第一方面的一种可能实施方式中，所述第一CCC小区的信息包括所述第一CCC小区的标识和所述第一CCC小区的接入信息。
在本申请实施例中，上述第一CCC小区的标识用于使终端设备快速搜索到上述第一CCC小区，上述第一CCC小区的接入信息包括第一CCC小区的小区选择参数，终端设备可以根据上述第一CCC小区的小区选择参数确定第一CCC小区是否满足上述小区选择准则。上述第一CCC小区的信息中包括第一CCC小区的标识和第一CCC小区的接入信息，终端设备可以根据第一CCC小区的标识快速搜索到上述第一CCC小区以及确定第一CCC小区是否满足小区选择准则，从而提高小区选择的效率。
在第一方面的一种可能实施方式中，所述第一CCC小区处于低负载状态。
在本申请实施例中，上述第一CCC小区处于低负载状态，网络设备通过广播消息中携带的指示信息来指示终端设备驻留第一CCC小区，可以保证终端设备与网络设备之间的通信质量。
在第一方面的一种可能实施方式中，所述广播消息还包括所述BCC小区的信息。
在本申请实施例中，上述广播消息可以是部署在上述网络设备上的BCC小区广播的广播消息，上述广播消息中包括BCC小区的信息。终端设备可以根据上述BCC小区的信息确定上述BCC小区是否满足小区选择准则。BCC小区的广播消息中携带BCC小区的信息以及用于指示终端设备驻留第一CCC小区的指示信息，终端设备根据上述BCC小区的信息确定上述BCC小区是否满足小区选择准则，以及在上述BCC小区满足小区选择准则的情况下根据上述指示信息以及小区选择准则确定是否驻留第一CCC小区，可以提高小区选择的效率。
在第一方面的一种可能实施方式中，所述根据所述指示信息及小区选择准则确定是否驻留所述第一CCC小区，包括：
在所述第一CCC小区不满足所述小区选择准则的情况下，确定不驻留所述第一CCC小区；或者，在所述第一CCC小区满足所述小区选择准则的情况下，确定驻留所述第一CCC 小区。
在本申请实施例中，在第一CCC小区满足上述小区选择准则的情况下，确定驻留第一CCC小区。在第一CCC小区不满足上述小区选择准则的情况下，确定不驻留第一CCC小区。终端设备驻留的小区需要满足小区选择准则，以保证终端设备能够与网络设备正常通信。
在第一方面的一种可能实施方式中，所述确定不驻留所述第一CCC小区之后，所述方法还包括：
确定驻留所述BCC小区。
在本申请实施例中，上述BCC小区满足上述小区选择准则，终端设备在确定不驻留上述第一CCC小区的情况下，确定驻留上述BCC小区，完成小区选择过程，以保证终端设备能够与网络设备正常通信。
在第一方面的一种可能实施方式中，所述接收广播消息，包括：
在所述BCC小区处于高负载状态的情况下，接收所述广播消息。
在本申请实施例中，在上述BCC小区处于高负载状态的情况下，网络设备发送上述包括指示信息的广播消息，通过在广播消息中携带指示信息指示终端设备驻留第一CCC小区，从而减轻BCC小区的负载。
第二方面，本申请实施例提供一种小区重选方法，包括：
接收广播消息，所述广播消息包括服务小区的邻区信息，所述邻区信息包括CCC小区的信息以及所述CCC小区的关联的BCC小区的信息；
根据所述BCC小区的信息以及小区重选准则，确定重选到所述CCC小区。
在本申请实施例中，上述广播消息可以由终端设备的服务小区所部署在的网络设备发送。上述广播消息包括服务小区的邻区信息，邻区信息中包括CCC小区的信息以及与CCC小区关联的BCC小区的信息，上述CCC小区为服务小区的邻区。终端设备可以根据上述BCC小区的信息，可以快速确定与上述CCC小区关联的BCC小区，从而提高小区重选的效率。
在第二方面的一种可能实施方式中，所述根据所述BCC小区的信息以及小区重选准则，确定重选到所述CCC小区，包括：
根据所述CCC小区的信息搜索所述CCC小区；在所述CCC小区满足所述小区重选准则的情况下，根据所述BCC小区的信息搜索所述BCC小区；在搜索到所述BCC小区的情况下，确定重选到所述CCC小区。
在本申请实施例中，由于上述CCC小区的系统信息由上述BCC小区广播，因此终端设备确定重选到CCC小区之前，需要确定搜索到上述BCC小区。终端设备根据上述CCC小区的信息搜索CCC小区，在CCC小区满足小区重选准则的情况下，再根据上述BCC小区的信息搜索BCC小区，在搜索到上述BCC小区的情况下，终端设备确定重选到CCC小区。终端设备根据上述CCC小区的信息和上述BCC小区的信息搜索分别搜索CCC小区和BCC小区，可以快速搜索到上述CCC小区和BCC小区，减少CCC小区和BCC的搜索时间，从而提高小区重选的效率。
在第二方面的一种可能实施方式中，所述确定重选到所述CCC小区，包括：
在所述BCC小区的参考信号接收功率RSRP大于第一阈值以及所述BCC小区的参考信号接收质量RSRQ大于第二阈值的情况下，确定重选到所述CCC小区。
在本申请实施例中，上述CCC小区的系统信息由上述BCC小区广播。在所述BCC小区的参考信号接收功率RSRP大于第一阈值以及所述BCC小区的参考信号接收质量RSRQ大于第二阈值的情况下，终端设备能够从BCC小区的广播消息中获取CCC小区的系统信息，终 端设备确定重选到上述CCC小区，从而保证小区重选的顺利进行。
在第二方面的一种可能实施方式中，在所述CCC小区为所述服务小区的同频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：
所述CCC小区为所述服务小区的同频邻区中R值最大的小区；且所述CCC小区的R值大于所述服务小区的R值的持续时长大于或等于第一时长；其中，所述CCC小区的R值是根据所述CCC小区的参考信号接收功率RSRP确定的，所述服务小区的R值是根据所述服务小区的RSRP确定的。
在第二方面的一种可能实施方式中，在所述CCC小区为所述服务小区的同优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：
所述CCC小区为所述服务小区的同优先级异频邻区中R值最大的小区，且所述CCC小区的R值大于所述服务小区的R值的持续时长大于或等于第二时长；其中，所述CCC小区的R值是根据所述CCC小区的参考信号接收功率RSRP确定的，所述服务小区的R值是根据所述服务小区的RSRP确定的。
在第二方面的一种可能实施方式中，在所述CCC小区为所述服务小区的低优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：所述CCC小区的RSRP大于第三阈值且所述服务小区的RSRP小于第四阈值的持续时长大于或等于第三时长；或者，所述CCC小区的参考信号接收质量RSRQ大于第五阈值且所述服务小区的RSRQ小于第六阈值的持续时长大于或等于第四时长。
在第二方面的一种可能实施方式中，在所述CCC小区为所述服务小区的高优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：所述CCC小区的RSRP大于第七阈值的持续时长大于或等于第五时长；或者，所述CCC小区的RSRQ大于第八阈值的持续时长大于或等于第六时长。
在第二方面的一种可能实施方式中，所述BCC小区的信息包括所述BCC小区的标识和/或所述BCC小区的频道编号。
在本申请实施例中，上述BCC小区的信息包括BCC小区的标识和/或BCC小区的频道编号，终端设备可以根据BCC小区的标识或者BCC小区的频道编号快速搜索到上述BCC小区，从而减少BCC小区的搜索时间。
第三方面，本申请实施例提供一种通信装置，包括；
收发模块，用于接收广播消息，所述广播消息包括指示信息，所述指示信息用于指示驻留第一CCC小区，所述第一CCC小区为与BCC小区关联的CCC小区，所述BCC小区为终端设备搜索到的满足小区选择准则的BCC小区；
处理模块，用于根据所述指示信息及所述小区选择准则确定是否驻留所述第一CCC小区。
在第三方面的一种可能实施方式中，所述第一CCC小区为所述BCC小区关联的一个或多个CCC小区中的任一个。
在第三方面的一种可能实施方式中，所述指示信息包括所述第一CCC小区的标识信息。
在第三方面的一种可能实施方式中，所述广播消息包括指示信息，包括：所述广播消息包括第一CCC小区的信息，所述指示信息包含在所述第一CCC小区的信息中。
在第三方面的一种可能实施方式中，所述第一CCC小区的信息包括所述第一CCC小区的标识和所述第一CCC小区的接入信息。
在第三方面的一种可能实施方式中，所述第一CCC小区处于低负载状态。
在第三方面的一种可能实施方式中，所述广播消息还包括所述BCC小区的信息。
在第三方面的一种可能实施方式中，所述处理模块，具体用于在所述第一CCC小区不满足所述小区选择准则的情况下，确定不驻留所述第一CCC小区；或者，在所述第一CCC小区满足所述小区选择准则的情况下，确定驻留所述第一CCC小区。
在第三方面的一种可能实施方式中，所述处理模块，还用于在确定不驻留所述第一CCC小区的情况下，确定驻留所述BCC小区。
在第三方面的一种可能实施方式中，所述收发模块，具体用于在所述BCC小区处于高负载状态的情况下，接收所述广播消息。
关于第三方面或第三方面的各种可能的实施方式所带来的技术效果，可参考对于第一方面或第一方面的各种可能的实施方式的技术效果的介绍。
第四方面，本申请实施例提供一种通信装置，包括：
收发模块，用于接收广播消息，所述广播消息包括服务小区的邻区信息，所述邻区信息包括CCC小区的信息以及所述CCC小区的关联的BCC小区的信息；
处理模块，用于根据所述BCC小区的信息以及小区重选准则，确定重选到所述CCC小区。
在第四方面的一种可能实施方式中，所述处理模块，具体用于根据所述CCC小区的信息搜索所述CCC小区；在所述CCC小区满足所述小区重选准则的情况下，根据所述BCC小区的信息搜索所述BCC小区；在搜索到所述BCC小区的情况下，确定重选到所述CCC小区。
在第四方面的一种可能实施方式中，所述处理模块，具体用于在所述BCC小区的参考信号接收功率RSRP大于第一阈值以及所述BCC小区的参考信号接收质量RSRQ大于第二阈值的情况下，确定重选到所述CCC小区。
在第四方面的一种可能实施方式中，在所述CCC小区为所述服务小区的同频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：所述CCC小区为所述服务小区的同频邻区中R值最大的小区；且所述CCC小区的R值大于所述服务小区的R值的持续时长大于或等于第一时长；其中，所述CCC小区的R值是根据所述CCC小区的参考信号接收功率RSRP确定的，所述服务小区的R值是根据所述服务小区的RSRP确定的。
在第四方面的一种可能实施方式中，在所述CCC小区为所述服务小区的同优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：所述CCC小区为所述服务小区的同优先级异频邻区中R值最大的小区，且所述CCC小区的R值大于所述服务小区的R值的持续时长大于或等于第二时长；其中，所述CCC小区的R值是根据所述CCC小区的参考信号接收功率RSRP确定的，所述服务小区的R值是根据所述服务小区的RSRP确定的。
在第四方面的一种可能实施方式中，在所述CCC小区为所述服务小区的低优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：所述CCC小区的RSRP大于第三阈值且所述服务小区的RSRP小于第四阈值的持续时长大于或等于第三时长；或者，所述CCC小区的参考信号接收质量RSRQ大于第五阈值且所述服务小区的RSRQ小于第六阈值的持续时长大于或等于第四时长。
在第四方面的一种可能实施方式中，在所述CCC小区为所述服务小区的高优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：所述CCC小区的RSRP大于第七阈值的持续时长大于或等于第五时长；或者，所述CCC小区的RSRQ大于第八阈值的持续时长大于或等于第六时长。
在第四方面的一种可能实施方式中，所述BCC小区的信息包括所述BCC小区的标识和/或所述BCC小区的频道编号。
关于第四方面或第四方面的各种可能的实施方式所带来的技术效果，可参考对于第二方面或第二方面的各种可能的实施方式的技术效果的介绍。
第五方面，本申请实施例提供一种通信装置，该通信装置包括处理器，用于执行上述第一方面或第一方面的任意可能的实现方式所示的方法。或者，该处理器用于执行存储器中存储的程序，当该程序被执行时，上述第一方面或第一方面的任意可能的实现方式所示的方法被执行。
对于上述各个通信装置来说，在执行上述方法的过程中，上述方法中有关发送信息的过程，可以理解为由处理器输出上述信息的过程。处理器输出上述信息时，处理器将该上述信息输出给收发器，以便由收发器进行发射。该上述信息在由处理器输出之后，还可能需要进行其他的处理，然后才到达收发器。类似的，处理器接收输入的信息时，收发器接收该上述信息，并将其输入处理器。更进一步的，在收发器收到该上述信息之后，该上述信息可能需要进行其他的处理，然后才输入处理器。
对于处理器所涉及的发射、发送和接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则均可以更加一般性的理解为处理器输出和接收、输入等操作，而不是直接由射频电路和天线所进行的发射、发送和接收操作。
在实现过程中，上述处理器可以是专门用于执行这些方法的处理器，也可以是执行存储器中的计算机指令来执行这些方法的处理器，例如通用处理器。上述存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。可理解，对于处理器和存储器的说明同样适用于下文示出的第六方面，为便于赘述第六方面不再详述。
在一种可能的实现方式中，存储器位于上述通信装置之外。
在一种可能的实现方式中，存储器位于上述通信装置之内。
本申请实施例中，处理器和存储器还可以集成于一个器件中，即处理器和存储器还可以被集成在一起。
在一种可能的实现方式中，通信装置还包括收发器，该收发器，用于接收信号或发送信号。
第六方面，本申请实施例提供一种通信装置，该通信装置包括处理器，用于执行上述第二方面或第二方面的任意可能的实现方式所示的方法。或者，处理器用于执行存储器中存储的程序，当该程序被执行时，上述第二方面或第二方面的任意可能的实现方式所示的方法被执行。
在一种可能的实现方式中，存储器位于上述通信装置之外。
在一种可能的实现方式中，存储器位于上述通信装置之内。
在本申请实施例中，处理器和存储器还可以集成于一个器件中，即处理器和存储器还可以被集成在一起。
在一种可能的实现方式中，通信装置还包括收发器，该收发器，用于接收信号或发送信号。
第七方面，本申请实施例提供一种通信装置，该通信装置包括逻辑电路和接口，所述逻辑电路和所述接口耦合；所述接口，用于接收广播消息。所述逻辑电路，用于根据广播消息确定是否驻留所述第一CCC小区。
关于该广播消息和第一CCC小区等的具体说明可以参考第一方面，这里不再详述。
第八方面，本申请实施例提供一种通信装置，该通信装置包括逻辑电路和接口，所述逻辑电路和所述接口耦合；所述接口，用于接收广播消息。所述逻辑电路，用于根据广播消息确定重选到所述CCC小区。
关于该广播消息和CCC小区等的具体说明可以参考第二方面，这里不再详述。
第九方面，本申请实施例提供一种计算机可读存储介质，该计算机可读存储介质用于存储计算机程序，当其在计算机上运行时，使得上述第一方面或第一方面的任意可能的实现方式所示的方法被执行。
第十方面，本申请实施例提供一种计算机可读存储介质，该计算机可读存储介质用于存储计算机程序，当其在计算机上运行时，使得上述第二方面或第二方面的任意可能的实现方式所示的方法被执行。
第十一方面，本申请实施例提供一种计算机程序产品，该计算机程序产品包括计算机程序或计算机代码，当其在计算机上运行时，使得上述第一方面或第一方面的任意可能的实现方式所示的方法被执行。
第十二方面，本申请实施例提供一种计算机程序产品，该计算机程序产品包括计算机程序或计算机代码，当其在计算机上运行时，使得上述第二方面或第二方面的任意可能的实现方式所示的方法被执行。
第十三方面，本申请实施例提供一种计算机程序，该计算机程序在计算机上运行时，上述第一方面或第一方面的任意可能的实现方式所示的方法被执行。
第十四方面，本申请实施例提供一种计算机程序，该计算机程序在计算机上运行时，上述第二方面或第二方面的任意可能的实现方式所示的方法被执行。
附图说明
以下对本申请实施例用到的附图进行介绍。
图1是本申请实施例提供的一种通信场景的示意图；
图2A是本申请实施例提供的一种多载波网络的结构示意图；
图2B是本申请实施例提供的一种多载波网络的结构示意图；
图3是本申请实施例提供的一种小区广播的示意图；
图4是本申请实施例提供的另一种小区广播的示意图；
图5是本申请实施例提供的一种小区选择方法的流程示意图；
图6是本申请实施例提供的另一种小区选择方法的流程示意图；
图7是本申请实施例提供的另一种小区选择方法的流程示意图；
图8是本申请实施例提供的另一种小区选择方法的流程示意图；
图9是本申请实施例提供的另一种小区选择方法的流程示意图；
图10是本申请实施例提供的一种小区重选方法的流程示意图；
图11是本申请实施例提供的另一种小区重选方法的流程示意图；
图12是本申请实施例提供的另一种小区重选方法的流程示意图；
图13是本申请实施例提供的另一种小区重选方法的流程示意图；
图14为本申请实施例提供的一种通信装置的结构示意图；
图15为本申请实施例提供的另一种通信装置的结构示意图；
图16为本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(globalsystem of mobile communication，GSM)系统、码分多址(code division multipleaccess，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long termevolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobiletelecommunication system，UMTS)、全球互联微波接入(worldwide interoperabilityfor microwave access，WiMAX)通信系统、未来的第五代(5th generation，5G)系统或新无线(new radio，NR)等。
本申请实施例中的终端设备可以指用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiationprotocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备可以是LTE系统中的演进型基站(evolutional nodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络设备或者未来演进的PLMN网络中的网络设备等，本申请实施例并不限定。
图1是本申请实施例的通信场景的示意图。该通信场景中包括至少一个终端设备101和至少一个网络设备102，图1中以一个终端设备101和一个网络设备102为例。所述网络设备102可以为接入网设备，例如基站。网络设备102包括一个或多个小区。当终端设备101移动到小区的覆盖范围内时，可以执行小区选择或小区重选。其中，小区选择是指终端设备在第一次接入网络时选择满足小区选择准则的小区并进行驻留的过程，例如，小区选择可以发生在终端设备开机时或脱网之后重新入网的时候。或者小区选择也可以发生在终端设备从连接态进入空闲态的时候。小区重选是指终端设备在接入网络之后，当存在比当前服务小区信号质量更好的小区的情况下，终端设备重新选择小区并驻留的过程。例如，小区重选可以发生在终端设备为空闲态的时候。
在详细介绍本申请的方法之前，首先对本申请涉及的一些概念作简单介绍。
1、多载波网络
多载波网络可以采用多个载波信号的并行方式传输数据，其中，每个载波可以对应一个小区。在多载波网络中，载波也可以称为分量载波(component carrier，CC)。示例性地，多载波网络中的多个载波可以共站部署，即多个载波可以部署在同一个基站上。如图2A所示， 图2A中以两个载波为例，这两个载波分别为载波1和载波2，载波1与载波2部署在同一个基站上。示例性地，多载波网络中的多个载波也可以异站部署，即多个载波可以部署在不同的基站上。如图2B所示，图2B中以两个载波为例，这两个载波分别为载波1和载波2，载波1与载波2分别部署在不同的基站上。
通常情况下，多载波网络中每个小区独立广播各自的同步信号块(synchronization signal slock，SSB)和系统信息(system information，SI)。图3示出了多载波网络中小区广播的一种示例，图3以两个小区为例。这两个小区分别为CC1和CC2，CC1广播CC1的SSB和SI，CC2广播CC2的SSB和SI。
在多载波网络的节能架构中，载波可以分为基础载波(basic component carrier，BCC)与容量载波(capacity component carrier，CCC)，BCC小区广播本小区的SSB和SI的同时，还广播CCC小区的SI。而CCC小区不广播本小区的SSB和SI，只广播探测参考信号(discovery reference signal，DRS)。示例性地，DRS具备SSB的基础功能，即DRS可以完成下行时间和频率的同步。但是DRS所占用的正交频分复用(orthogonal frequency divisition multiplexing，OFDM)符号数少于SSB所占用的OFDM符号。例如，SSB占用4个OFDM符号，DRS可以占用1至3个OFDM符号。图4示出了多载波网络的节能架构中小区广播的一种示例，图4以两个小区为例。这两个小区分别为BCC小区和CCC小区，BCC小区广播SSB和BCC小区的SI以及CCC小区的SI，CCC小区广播DRS。
示例性地，一个BCC小区可以关联一个或多个CCC小区，即一个BCC小区的广播消息中可以包括一个或多个CCC小区的系统信息。由于CCC小区不广播SI，终端设备可以在CCC小区关联的BCC小区的广播消息中获取该CCC小区的SI。
在多载波网络的节能架构中，对于CCC小区来说，CCC小区不广播SSB和SI，只广播DRS，节省了用于传输CCC小区的SI和SSB的OFMD符号，进而可以增加时域关断的机会，实现节省功耗的目的。对于BCC小区来说，由于BCC小区需要广播CCC小区的SI，会导致BCC小区的功耗增加。但是BCC小区增加的功耗小于CCC小区节省的功耗，因此可以减少多载波网络的整体功耗。
2、小区选择
终端设备在第一次接入网络时，例如终端设备在开机、退出无线资源控制(radio resource control，RRC)连接态(connected state)、进入网络覆盖区域、发生无线链路失败(radio link failure，RLF)的情况下，需要选择一个小区驻留或者RRC重建，这一过程称为小区选择(cell selection)。
示例性地，在小区选择过程中，终端设备可以在多个频率上进行小区搜索。例如，终端设备可以在每个频率上搜索信号强度最强的小区。若搜索到满足小区选择准则的小区，则选择该小区进行驻留。示例性地，上述多个频率可以为终端设备配置的移动网络中小区所在的频率点。例如，上述多个频率可以配置在SIM(subscriber identity module)卡中。
示例性地，上述小区选择准则包括S准则。上述S准则包括：S1>0且S2>0。
示例性地，上述S1可以记为Srxlev，表示小区的小区选择接收电平值。上述S2可以记为Squal，表示小区的小区选择质量值。上述S1和S2满足如下公式：
S1＝Q1-(Q rxlevmin+Q rxlevminoffset)-P compensation-Q offsettemp
S2＝Q2-(Q qualmin+Q qualminoffset)-Q offsettemp
其中，Q1为小区的广播消息(例如SSB或SI)的参考信号接收功率(reference signal receiving power，RSRP)，Q rxlevmin表示小区驻留所需的最小RSRP，Q rxlevminoffset表示Q rxlevmin 的偏移量，Pcompensation表示功率补偿值，Qoffsettemp表示临时的偏移量。Q2为小区的参考信号接收质量(reference signal receiving quality，RSRQ)，Q qualmin表示小区驻留所需的最小RSRQ，Q qualminoffset表示Q qualmin的偏移量。
示例性地，上述Q1和Q2可以由终端设备对接收到的小区的广播消息(例如SSB、SI)的信号强度进行测量得到。上述参数Q rxlevmin，Q rxlevminoffset，Q qualmin，Q qualminoffset，P compensation，Q offsettemp可以包含在小区的系统信息中或者可以由小区系统信息中的参数推导得出。为了便于描述，本申请实施例中将Q rxlevmin，Q rxlevminoffset，Q qualmin，Q qualminoffset，P compensation，Q offsettemp称为小区选择参数。
示例性地，上述小区选择准则还包括网络归属准则。上述网络归属准则包括：小区所属的网络是终端设备的所选网络(selected network)、注册网络(registered network)或者等效网络(equivalent network)中的任一项。
示例性地，上述小区选择准则还包括小区可用准则。上述小区可用准则包括：小区没有被禁止(barred)或者被预留(reserved)，小区不在漫游禁止跟踪区(forbidden tracking areas for roaming)列表所包含的跟踪区之中。
需要说明的是，上述小区选择准则仅为示例，随着标准技术的演进，小区选择准则可能会发生变化，在该情况下，同样适用于本申请实施例提供的方法。因此，不应将上文所示的小区选择准则理解为对本申请实施的限定。
3、小区重选
处于RRC空闲态(idle state)和RRC非激活态(inactive state)的终端设备可以重新选择其他小区进行驻留，这一过程称为小区重选(cell re-selection)。在小区重选过程中，终端设备首先对服务小区的邻区进行测量，若测量到满足小区重选准则的邻区，则重选到该邻区。
示例性地，小区重选可以包括同频小区重选(intra-frequency cell reselection)和异频小区重选(inter-frequency cell reselection)。同频小区重选是指终端设备重选到与服务小区(serving cell)频率相同的邻区。异频小区重选是指终端设备重选到与服务小区频率不同的邻区。上述服务小区是指终端设备当前驻留的小区。根据服务小区所在频率和邻区所在频率的优先级，异频小区重选又分为同优先级异频小区重选、低优先级异频小区重选、高优先级异频小区重选。同优先级异频小区重选表示重选到频率优先级等于服务小区的异频邻区，低优先级异频小区重选表示重选到频率优先级低于服务小区的异频邻区，高优先级异频小区重选表示重选到频率优先级高于服务小区的异频邻区。示例性地，上述频率的优先级由网络设备配置。
(1)同频小区重选
示例性地，在终端设备的服务小区的信号强度满足S1≤S1 intra或者S2≤S2 intra时，终端设备进行同频邻区测量。其中，S1和S2的计算公式可以参见前述小区选择中的相关描述，上述S1 intra和S2 intra分别为S1和S2的门限值，终端设备在服务小区的S1小于门限值S1 intra或者服务小区的S2小于或等于门限值S2 intra时，进行同频邻区测量，以便重选到同频邻区。示例性地，S1 intra和S2 intra可以包含在服务小区的系统信息中。终端设备接收服务小区广播的系统信息，从服务小区的系统信息中得到S1 intra和S2 intra。
示例性地，终端设备对服务小区的各个同频邻区进行测量。终端设备测量到一个同频邻区，即接收到该同频邻区的广播消息，例如SSB或SI。终端设备首先确定该同频邻区的信号强度是否满足S准则，S准则可以参见前述小区选择的相关描述。若该同频邻区满足上述S准则，则计算该同频邻区的R值。该同频邻区的R值满足如下公式：
R＝Qn-Q offset-Q offsettemp,n
其中，Qn为该同频邻区的广播消息(例如SSB或SI)的RSRP，Q offset为该同频邻区相对服务小区的偏移量，Q offsettemp,n为该同频邻区的偏移量。Q offset和Q offsettemp,n包含在服务小区的系统信息中。
示例性地，终端设备测量到满足上述S准则的至少一个同频邻区，并计算上述至少一个同频邻区的R值。若在规定时间间隔内，第一同频邻区的R值保持大于服务小区的R值，且第一同频邻区满足网络归属准则和小区可用准则，则终端设备确定重选到第一同频邻区。其中，上述第一同频邻区为上述至少一个同频邻区中R值最大的一个。示例性地，上述规定时间间隔可以是由协议规定的，或者由网络设备配置。
示例性地，上述服务小区的R值满足如下公式：
R＝Qs+Q hyst-Q offsteeemp,s
其中，Qs为服务小区的广播消息(例如SSB、SI)的RSRP，Q hyst为服务小区的滞后量(hysteresis)，Q offsettemp,s为服务小区的偏移量。示例性地，Q hyst和Q offsettemp,s两个参数包含在服务小区的系统信息中，Qs可以通过对服务小区广播的SSB的信号强度进行测量得到。为了便于描述，本申请实施例中可以将上述Q offset，Q offsettemp,n，Q hyst，Q offsettemp,s称为小区重选参数。
示例性地，上述小区的R值可以表示小区的小区重选优先级。
(2)同优先级异频小区重选
示例性地，在服务小区的信号强度满足S1≤S1 non-intra或者S2≤S2 non-intra时，终端设备进行同优先级异频邻区测量。其中，S1和S2可以参见前述小区选择中的相关描述，上述S1 non-intra和S2 non-intra分别为S1和S2的门限值，终端设备在服务小区的S1小于门限值S1 non-intra或者服务小区的S2小于或等于门限值S2 non-intra时，进行同优先级异频邻区测量，以便重选到同优先级异频邻区。示例性地，S1 non-intra和S2 non-intra包含在服务小区的系统信息中。终端设备接收服务小区广播的系统信息，从该系统信息中得到S1 non-intra和S2 non-intra。
示例性地，终端设备对服务小区的各个同优先级异频邻区进行测量。若测量到的同优先级异频邻区满足S准则，则计算该同优先级异频邻区的R值。上述同优先级异频邻区的R值的计算参见前述同频小区重选中同频邻区的R值的相关描述。
示例性地，终端设备测量到满足上述S准则的至少一个同优先级异频邻区，并计算上述至少一个同优先级异频邻区的R值。若在规定时间间隔内，第一同优先级异频邻区的R值保持大于服务小区的R值，且第一同优先级异频邻区满足网络归属准则和小区可用准则，则终端设备确定重选到第一同优先级异频邻区。其中，第一同优先级异频邻区为上述至少一个同优先级异频邻区中R值最大的一个。上述服务小区的R值的计算参见前述同频小区重选中服务小区的R值的相关描述。
(3)低优先级异频邻区重选
示例性地，在服务小区的信号强度满足S1≤S1 non-intra或者S2≤S2 non-intra时，终端设备进行低优先级异频邻区测量。其中，S1和S2可以参见前述小区选择中的相关描述，上述S1 non-intra和S2 non-intra分别为S1和S2的门限值，终端设备在服务小区的S1小于门限值S1non-intra或者服务小区的S2小于或等于门限值S2 non-intra时，进行低优先级异频邻区测量，以便重选到低优先级异频邻区。示例性地，S1 non-intra和S2 non-intra包含在服务小区的系统信息中。终端设备接收服务小区广播的系统信息，从该系统信息中得到S1 non-intra和S2 non-intra。
示例性地，终端设备对第一低优先级异频邻区进行测量，上述第一低优先级异频邻区为服务小区的至少一个低优先级异频邻区中的任一个。在上述第一低优先级异频邻区满足S准则、网络归属准则、小区可用准则的情况下，若第一低优先级异频邻区满足低优先级异频邻 区重选条件中的一项或多项，则终端设备确定重选到第一低优先级异频邻区。上述低优先级异频邻区重选条件包括如下条件：
条件一：服务小区的S1<Th s,low,p且第一低优先级异频邻区在规定时间间隔内保持S1>Th x,low,p；
条件二：服务小区的S2<Th s,low,q且第一低优先级异频邻区在规定时间间隔内保持S2>Th x,low,q。
其中，Th s,low,p，Th x,low,p，Th s,low,q，Th x,low,q表示的是门限值，这些参数包含在服务小区的系统信息中。在上述第一低优先级异频邻区满足上述低优先级异频邻区重选条件的中的任一项的情况下，终端设备确定重选到第一低优先级异频邻区。
应理解的是，上述低优先级异频邻区重选条件仅为示例，本申请实施例的低优先级异频邻区重选条件不限于上述两种示例，还可以包括随着技术的发展出现的新的其他低优先级异频邻区重选条件。因此，不应将上文所示的低优先级异频邻区重选条件理解为对本申请实施的限定。
(4)高优先级异频小区重选
终端设备对服务小区的高优先级异频邻区进行测量。示例性地，终端设备可以周期性地对高优先级异频邻区进行测量，以便重选到高优先级异频邻区。
示例性地，终端设备对第一高优先级异频邻区进行测量，第一高优先级异频邻区为服务小区的至少一个高优先级异频邻区中的任一个。在上述第一高优先级异频邻区满足S准则、网络归属准则、小区可用准则的情况下，若第一高优先级异频邻区满足高优先级异频邻区重选条件，则终端设备确定重选到第一高优先级异频邻区。上述高优先级异频邻区重选条件包括如下条件：
条件一：第一高优先级异频邻区在规定时间间隔内保持S1>Th x,high,p；
条件二：第一高优先级异频邻区在规定时间间隔内保持S2>Th x,high,q。
其中，Th x,high,p和Th x,high,q表示的是门限值，这些参数包含在服务小区的系统信息中。在第一高优先级异频邻区满足上述高优先级异频邻区重选条件中的任一项的情况下，终端设备确定重选到第一高优先级异频邻区。
应理解的是，上述高优先级异频邻区重选条件仅为示例，本申请实施例的高优先级异频邻区重选条件不限于上述两种示例，还可以包括随着技术的发展出现的新的其他高优先级异频邻区重选条件。因此，不应将上文所示的高优先级异频邻区重选条件理解为对本申请实施的限定。
请参见图5，图5为本申请实施例提供的一种小区选择方法的流程示意图。如图5所示，该小区选择方法包括但不限于如下步骤。
501，终端设备接收网络设备发送的广播消息，所述广播消息包括指示信息，所述指示信息用于指示驻留第一CCC小区，所述第一CCC小区为与BCC小区关联的CCC小区，所述BCC小区为终端设备搜索到的满足小区选择准则的BCC小区。
示例性地，上述广播消息可以是与终端设备通信的网络设备广播的任意广播消息，也可以是部署在上述网络设备上的BCC小区广播的广播消息。上述广播消息包括指示信息，指示信息用于指示终端设备驻留与BCC小区关联的第一CCC小区。可以理解的是，上述指示信息也可以用于指示终端设备在上述BCC小区以及与BCC小区关联的一个或多个CCC小区中优先驻留第一CCC小区。终端设备在接收上述广播消息之后，确定第一CCC小区是否满足 小区选择准则。
示例性地，上述小区选择准则可以包括S准则，即S1>0且S2>0。上述BCC小区满足小区选择准则，即上述BCC小区的S1>0且S2>0。其中，BCC小区的S1和S2的计算公式参数前述小区选择中的相关描述。可理解，关于小区选择准则的具体说明还可以参考上文，这里不再一一详述。
示例性地，上述终端设备搜索到BCC小区指的是终端设备检测到BCC小区广播的广播消息(例如SSB、SI)。终端设备在检测到上述BCC小区广播的广播消息之后，对接收到的广播消息进行测量，得到BCC小区的广播消息的RSRP和RSRQ，终端设备上述BCC小区为终端设备搜索到的且满足小区选择准则的BCC小区。
示例性地，上述小区选择准则还包括网络归属准则以及小区可用准则。上述网络归属准则和小区可用准则的具体说明可以参考上文，这里不再一一详述。
示例性地，上述BCC小区与上述第一CCC小区可以部署在同一个网络设备上(共站部署)，也可以部署在不同的网络设备上(异站部署)。
在一种实施方式中，上述广播消息还包括BCC小区的信息。上述BCC小区的信息可以包括BCC小区的标识、BCC小区的接入信息。
示例性地，上述广播消息是BCC小区的广播消息，终端设备在接收上述广播消息后，根据广播消息包括的BCC小区的信息确定BCC小区是否满足上述小区选择准则。例如，上述BCC小区的接入信息中包括BCC的小区选择参数，终端设备检测接收到的广播消息的RSRP和RSRQ，根据上述RSRP、RSRQ以及BCC小区的小区选择参数计算BCC小区的S1和S2。在BCC小区的S1和S2满足S1>0且S2>0的情况下，确定上述BCC小区满足上述小区选择准则。
示例性地，上述BCC小区的标识可以包括PCI或者小区标识(cell identity)。上述BCC小区的接入信息可以包括BCC小区的小区选择参数、用于小区接入控制的禁止因子(Barring Factor)等。
示例性地，上述BCC小区的信息还可以包括BCC小区的配置信息。上述BCC小区的配置信息可以包括物理下行控制信道(physical downlink control channel，PCCCH)和物理下行共享信道(physical downlink shared channel，PDSCH)的时域和频域位置、物理随机接入信道(physical random access channel，PRACH)的根序列索引等。
在本申请实施例中，上述广播消息可以是部署在上述网络设备上的BCC小区广播的广播消息，上述广播消息中包括BCC小区的信息。终端设备可以根据上述BCC小区的信息确定上述BCC小区是否满足小区选择准则。BCC小区的广播消息中携带BCC小区的信息以及用于指示终端设备驻留第一CCC小区的指示信息，终端设备根据上述BCC小区的信息确定上述BCC小区是否满足小区选择准则，以及在上述BCC小区满足小区选择准则的情况下根据上述指示信息以及小区选择准则确定是否驻留第一CCC小区，可以提高小区选择的效率。
在一种实施方式中，上述接收广播消息，包括如下步骤：
在上述BCC小区处于高负载状态的情况下，接收广播消息。
示例性地，在上述BCC小区处于高负载状态的情况下，网络设备发送上述包含指示信息的广播消息，以指示终端设备驻留第一CCC小区，从而减轻BCC小区的负载。
在一种实施方式中，在第一CCC小区的干扰较小的情况下，网络设备发送上述包含指示信息的广播消息，以指示终端设备驻留第一CCC小区。示例性地，上述第一CCC小区的干扰较小可以是指第一CCC小区的干扰小于上述BCC小区的干扰，也可以是指第一CCC小区 的干扰小于设定阈值。由于第一CCC小区的干扰较小，终端设备接入第一CCC小区，可以使用较小的功率来传输数据，从而提升传输的功率效率。
为了更详细地解释上述第一CCC小区，本申请实施例还提供以下几种情况：
情况一：上述第一CCC小区为上述BCC小区关联的一个或多个CCC小区中的任一个。
示例性地，上述BCC小区可以关联一个或多个CCC小区，上述指示信息用于指示终端设备驻留与上述BCC小区关联的一个或多个CCC小区中的任一个。
本申请实施例中，终端设备通过接收到的广播消息确定可以驻留与上述BCC小区关联的一个或多个CCC小区中的任一个CCC小区。终端设备可以搜索上述一个或多个CCC小区，并选择上述一个或多个CCC小区中满足小区选择准则的CCC小区进行驻留，从而减轻了BCC小区的负载。
情况二：上述指示信息包括上述第一CCC小区的标识信息，即上述第一CCC小区为指示信息中携带的标识信息对应的CCC小区。
示例性地，终端设备通过在指示信息中携带第一CCC小区的标识信息确定可以驻留第一CCC小区。可以理解的是，上述第一CCC小区为网络设备确定的适合终端设备驻留的小区，例如第一CCC小区处于低负载状态，或者第一CCC小区所受的干扰较小。终端设备通过指示信息中携带的CCC小区的标识信息可以更精确地获知合适的、可以驻留的小区，使得终端设备驻留到合适的小区，以保证终端设备与网络设备之间的通信质量。
示例性地，上述第一CCC小区处于低负载状态。示例性地，上述第一CCC小区处于低负载状态可以是指第一CCC小区的资源块(resource block，RB)的占用率小于设定阈值的CCC小区，例如第一CCC小区的RB的占用率小于30％。示例性地，上述第一CCC小区处于低负载状态也可以指的是第一CCC小区的RRC连接用户数小于设定阈值，例如第一CCC小区的RRC连接用户数小于600。应理解，上述RB的占用率小于30％以及RRC连接用户数小于600只是示例，不应对本申请构成限定。
示例性地，上述第一CCC小区处于低负载状态也可以理解为第一CCC小区的负载小于上述BCC小区的负载。
应该理解的是，上述指示信息中可以携带多个CCC小区的标识信息，上述第一CCC小区为上述多个CCC小区中的任一个。上述指示信息用于指示终端设备驻留上述多个CCC小区中的任一个。
在本申请实施例中，在上述第一CCC小区处于低负载状态的情况下，在上述指示信息中携带上述第一CCC小区的标识信息，以指示终端设备驻留上述第一CCC小区，可以保证终端设备与网络设备之间的通信质量。
情况三：上述广播消息包括第一CCC小区的信息，上述指示信息包含在第一CCC小区的信息中，即上述第一CCC小区为与BCC小区关联的一个或多个CCC小区中小区的信息中携带上述指示信息的CCC小区。
本申请实施例中，终端设备可以通过第一CCC小区的信息中携带的指示信息确定可以驻留第一CCC小区。可以理解的是，上述第一CCC小区为网络设备确定适合终端设备驻留的小区，例如第一CCC小区处于低负载状态，或者第一CCC小区所受的干扰较小。终端设备通过在CCC小区的信息中携带指示信息可以更精确地获知合适的、可以驻留的小区，使得终端设备驻留到合适的小区，以保证终端设备与网络设备之间的通信质量。
示例性地，上述第一CCC小区的信息包括第一CCC小区的标识和第一CCC小区的接入信息。上述第一CCC小区的标识可以包括物理小区标识(physical cell identifier，PCI)或者 小区标识(cell identity)。上述第一CCC小区的标识用于使终端设备快速地搜索到第一CCC小区。上述第一CCC小区的接入信息包括第一CCC小区的参数信息，上述参数信息用于确定第一CCC小区的小区选择参数的信息，小区选择参数包括上述第一CCC小区的Q rxlevmin，Q rxlevminoffset，Q qualmin，Q qualminoffset。终端设备可以根据第一CCC小区的小区选择参数以及检测到的第一CCC小区的SSB的信号强度确定第一CCC小区是否满足上述小区选择准则。
示例性地，上述第一CCC小区的接入信息还可以包括用于小区接入控制的禁止因子等。
示例性地，上述第一CCC小区的信息还可以包括第一CCC小区的配置信息，例如：物理下行控制信道(PCCCH)和物理下行共享信道(PDSCH)的时域和频域位置、物理随机接入信道(PRACH)的根序列索引等。
在本申请实施例中，上述第一CCC小区的标识用于使终端设备快速搜索到上述第一CCC小区，上述第一CCC小区的接入信息包括第一CCC小区的小区选择参数，终端设备可以根据上述第一CCC小区的小区选择参数确定第一CCC小区是否满足上述小区选择准则。上述第一CCC小区的信息中包括第一CCC小区的标识和第一CCC小区的接入信息，终端设备可以根据第一CCC小区的标识快速搜索到上述第一CCC小区以及确定第一CCC小区是否满足小区选择准则，从而提高小区选择的效率。
示例性地，上述第一CCC小区处于低负载状态。示例性地，上述第一CCC小区处于低负载状态可以理解为上述第一CCC小区的负载小于上述BCC小区的负载。
示例性地，上述广播消息可以包括与上述BCC关联的多个CCC小区的信息，上述第一CCC小区为上述多个CCC小区中CCC小区的信息中携带指示信息的一个。示例性地，上述广播消息中可以包括多个指示信息，上述多个指示信息可以分别包含在上述多个CCC小区的信息中，上述多个CCC小区处于低负载状态的CCC小区，上述第一CCC小区为上述多个CCC小区中的一个。网络设备通过在处于低负载状态的多个CCC的信息中携带上述指示信息来指示终端设备驻留上述多个CCC小区中的任一个。
在本申请实施例中，上述第一CCC小区处于低负载状态，网络设备通过在第一CCC小区的信息中携带的指示信息来指示终端设备驻留第一CCC小区，可以保证终端设备与网络设备之间的通信质量。
502，终端设备根据上述指示信息及所述小区选择准则确定是否驻留所述第一CCC小区。
示例性地，上述指示信息用于指示终端设备驻留第一CCC小区，在终端设备驻留第一CCC小区之前需要确定第一CCC小区是否满足小区选择准则。在第一CCC小区满足上述小区选择准则的情况下，终端设备可以驻留到该第一CCC小区。
示例性地，上述广播消息中包括上述第一CCC小区的标识和第一CCC小区的接入信息，例如第一CCC小区的小区标识和频道编号。终端设备根据上述第一CCC小区的信息搜索第一CCC小区，例如在与第一CCC小区的频道编号对应的频道上搜索小区标识为第一CCC小区的小区标识的小区。若终端设备在上述频道上搜索到小区标识为第一CCC小区的小区标识的小区，则确定搜索到第一CCC小区。
示例性地，终端设备搜索到上述第一CCC小区，即终端设备接收到第一CCC小区广播的广播消息，例如DRS。终端设备在接收到第一CCC小区的DRS后，根据接收到的DRS的信号强度确定上述第一CCC小区是否满足上述小区选择准则。
在本申请实施例中，终端设备通过接收广播消息可以明确获知其可以驻留第一CCC小区，从而有效改善了终端设备驻留到其他小区如BCC小区但是该BCC小区负载过重的情况，使得该终端设备可以驻留到合适的小区。需要说明的是，该指示信息指示终端设备可以驻留到 第一CCC小区，至于该终端设备是否驻留该第一CCC小区，则可以根据小区选择准则进一步确定。
在一种实施方式中，上述根据所述指示信息及小区选择准则确定是否驻留所述第一CCC小区，包括如下步骤：
在所述第一CCC小区不满足所述小区选择准则的情况下，确定不驻留所述第一CCC小区；
在所述第一CCC小区满足所述小区选择准则的情况下，确定驻留所述第一CCC小区。
示例性地，上述广播消息包括第一CCC小区的标识，终端设备根据上述第一CCC小区的标识搜索第一CCC小区，并检测第一CCC小区的DRS的RSRP和RSRQ。终端设备根据上述第一CCC小区的接入信息确定第一CCC小区的小区选择参数。利用第一CCC小区的RSRP、RSRQ以及第一CCC小区的小区选择参数计算第一CCC小区的S1和S2。若第一CCC小区的S1和S2满足S1>0且S2>0，则确定第一CCC小区满足上述小区选择准则。否则，确定上述第一CCC小区不满足上述小区选择准则。
在上述第一CCC小区满足上述小区选择准则的情况下，终端设备确定驻留上述第一CCC小区。在上述第一CCC小区不满足上述小区选择准则的情况下，终端设备确定不驻留上述第一CCC小区，以保证终端设备能够与网络设备正常通信。
在一种实施方式中，上述确定不驻留所述第一CCC小区之后，上述小区选择方法还包括如下步骤：
确定驻留上述BCC小区。
示例性地，上述BCC小区为终端设备搜索到的满足上述小区选择准则的BCC小区，因此在上述第一CCC小区不满足上述小区选择准则的情况下，终端设备可以选择上述BCC小区进行驻留。即终端设备确定不驻留上述第一CCC小区之后，确定驻留上述BCC小区。
可以理解的是，终端设备在确定不驻留上述第一CCC小区之后，还可以搜索上述一个或多个CCC小区中除了上述第一CCC小区之外的其他CCC小区，并根据上述小区选择准则确定是否驻留上述其他CCC小区。在上述一个或多个CCC小区中存在一个满足上述小区选择准则的CCC小区的情况下，终端设备确定驻留该满足小区选择准则的CCC小区。在上述一个或多个CCC小区都不满足上述小区选择准则的情况下，终端设备确定驻留上述BCC小区。
在本申请实施例中，上述BCC小区满足上述小区选择准则，终端设备在确定不驻留上述第一CCC小区的情况下，确定驻留上述BCC小区，完成小区选择过程，以保证终端设备能够与网络设备正常通信。
请参见图6，图6为本申请实施例提供的另一种小区选择方法的流程示意图。如图6所示，该小区选择方法包括但不限于如下步骤。
601，终端设备接收网络设备发送的广播消息。
示例性地，上述广播消息由部署在网络设备上的BCC小区广播。上述广播消息包括BCC小区的信息，上述BCC小区的信息包括BCC小区的接入信息，上述接入信息包括BCC小区的小区选择参数。终端设备在接收到上述广播消息之后，测量该广播消息的RSRP和RSRQ，再根据广播消息的RSRP和RSRQ以及BCC小区的小区选择参数计算BCC小区的S1和S2。在BCC小区的S1和S2满足S1>0且S2>0的情况下，确定该BCC小区满足上述小区选择准则。
示例性地，上述BCC小区为终端设备在多个频率上搜索到的满足上述小区选择准则的 BCC小区。终端设备在多个频率上搜索多个BCC小区，即在多个频率上检测多个BCC小区的广播消息(例如SSB、SI)。在搜索到上述多个BCC小区中的任一个BCC小区的情况下，即终端设备检测到该BCC小区的广播消息，确定该BCC小区是否满足小区选择准则。若该BCC小区不满足上述小区选择准则，则继续搜索满足上述小区选择准则的BCC小区。
602，在上述BCC小区满足小区选择准则的情况下，终端设备确定上述广播消息中是否包括指示信息。
示例性地，上述指示信息用于指示终端设备驻留与上述BCC小区关联的第一CCC小区。上述第一CCC小区为与上述BCC小区关联的一个或多个CCC小区中的任一个。
在上述广播消息不包括上述指示信息的情况下，终端设备可以选择上述BCC小区进行驻留，也可以选择与上述BCC小区关联的一个或多个CCC小区中的任一个CCC小区进行驻留，本申请不做限定。
在一种实施方式中，在上述广播消息不包括上述指示信息的情况下，终端设备确定上述BCC小区的负载状态。在上述BCC小区处于低负载状态的情况下，终端设备选择上述BCC小区进行驻留。在上述BCC小区处于高负载状态的情况下，终端设备根据广播消息中包括的CCC小区的信息搜索上述一个或多个CCC小区。在搜索到一个满足上述小区选择准则的CCC小区的情况下，确定驻留该CCC小区。
603，在上述广播消息中包括上述指示信息的情况下，终端设备搜索第一CCC小区。
示例性地，上述广播消息中包括上述第一CCC小区的信息，例如第一CCC小区的小区标识和频道编号。终端设备根据上述第一CCC小区的信息搜索第一CCC小区，例如在与第一CCC小区的频道编号对应的频道上搜索小区标识为第一CCC小区的小区标识的小区。若终端设备在上述频道上搜索到小区标识为第一CCC小区的小区标识的小区，则确定搜索到第一CCC小区。
604，终端设备根据小区选择准则确定是否驻留第一CCC小区。
示例性地，终端设备搜索到上述第一CCC小区，即终端设备接收到第一CCC小区广播的广播消息，例如DRS。终端设备在接收到第一CCC小区的DRS后，对第一CCC小区的DRS进行测量，得到第一CCC小区的DRS的RSRP和RSRQ。
示例性地，上述第一CCC小区的信息还包括第一CCC小区的接入信息，上述接入信息包括第一CCC小区的小区选择参数。终端设备根据上述DRS的RSRP和RSRQ以及第一CCC小区的小区选择参数计算第一CCC小区的S1和S2。在第一CCC小区的S1和S2满足S1>0且S2>0的情况下，确定第一CCC小区满足上述小区选择准则。
在上述第一CCC小区满足上述小区选择准则的情况下，终端设备确定驻留第一CCC小区。
在上述第一CCC小区不满足上述小区选择准则的情况下，终端设备确定不驻留第一CCC小区。终端设备搜索上述一个或多个CCC小区中除了第一CCC小区之外的其他CCC小区，并根据上述小区选择准则确定是否驻留上述其他CCC小区。
示例性地，在上述一个或多个CCC小区均不满足上述小区选择准则的情况下，终端设备确定选择上述BCC小区进行驻留。
在本申请实施例中，终端设备通过接收到的广播消息确定可以驻留与上述BCC小区关联的一个或多个CCC小区中的任一个CCC小区。终端设备可以搜索上述一个或多个CCC小区，并选择上述一个或多个CCC小区中满足小区选择准则的CCC小区进行驻留，从而减轻了BCC小区的负载。在上述第一CCC小区受到的干扰较小的情况下，通过指示信息指示终端设备驻 留第一CCC小区还可以提升传输的功率效率。
请参见图7，图7为本申请实施例提供的另一种小区选择方法的流程示意图，也可以理解为是上述图6中的小区选择方法的补充或变形。如图7所示，该小区选择方法包括但不限于如下步骤。
701，搜索BCC小区并接收广播消息。
该BCC小区满足小区选择准则。步骤701的具体说明可以参考步骤601的相关说明，这里不再详述。
702，确定广播消息中是否包括指示信息。若是，则执行步骤703。
可理解，关于上述指示信息的具体说明可以参考上文，这里不再详述。示例性地，在上述广播消息不包括上述指示信息的情况下，终端设备可以选择上述BCC小区进行驻留，也可以搜索与BCC小区关联的一个或多个CCC小区，从一个或多个CCC小区中选择一个满足小区选择准则的CCC小区进行驻留，本申请不做限定。
703，搜索与BCC小区关联的一个或多个CCC小区。若搜索结束，则执行步骤706；若搜索未结束，则执行步骤704。
704，搜索到的一个CCC小区是否满足小区选择准则。若是，则执行步骤705；若否，则转入执行步骤703。
705，确定驻留该CCC小区。
706，确定驻留该BCC小区。
在本申请实施例中，终端设备通过接收到的广播消息确定可以驻留与上述BCC小区关联的一个或多个CCC小区中的任一个CCC小区。终端设备可以搜索上述一个或多个CCC小区，并选择上述一个或多个CCC小区中满足小区选择准则的CCC小区进行驻留，从而减轻了BCC小区的负载。在上述第一CCC小区受到的干扰较小的情况下，通过指示信息指示终端设备驻留第一CCC小区还可以提升传输的功率效率。
请参见图8，图8为本申请实施例提供的另一种小区选择方法的流程示意图。如图8所示，该小区选择方法包括但不限于如下步骤。
801，终端设备接收网络设备发送的广播消息。
示例性地，上述广播消息由部署在网络设备上的BCC小区广播。上述广播消息包括BCC小区的信息，上述BCC小区的信息包括BCC小区的接入信息，上述接入信息包括BCC小区的小区选择参数。终端设备在接收到上述广播消息之后，测量该广播消息的RSRP和RSRQ，再根据广播消息的RSRP和RSRQ以及BCC小区的小区选择参数计算BCC小区的S1和S2。在BCC小区的S1和S2满足S1>0且S2>0的情况下，确定该BCC小区满足上述小区选择准则。
示例性地，上述BCC小区为终端设备在多个频率上搜索到的满足上述小区选择准则的BCC小区。终端设备在多个频率上搜索多个BCC小区，即在多个频率上检测多个BCC小区的广播消息(例如SSB、SI)。在搜索到上述多个BCC小区中的任一个BCC小区的情况下，即终端设备检测到该BCC小区的广播消息，确定该BCC小区是否满足小区选择准则。若该BCC小区不满足上述小区选择准则，则继续搜索满足上述小区选择准则的BCC小区。
802，在上述BCC小区满足小区选择准则的情况下，终端设备搜索上述第一CCC小区。
示例性地，上述第一CCC小区与上述BCC小区关联。上述广播消息中还包括上述第一CCC小区的信息，上述第一CCC小区的信息中包括指示信息。上述指示信息用于指示终端设备驻留第一CCC小区。
示例性地，上述第一CCC小区的信息还包括第一CCC小区的标识。终端设备根据上述第一CCC小区的标识搜索第一CCC小区。例如，上述第一CCC小区的标识包括第一CCC小区的小区标识和频道编号，终端设备在与第一CCC小区的频道编号对应的频道上搜索小区标识为第一CCC小区的小区标识的小区。若终端设备在上述频道上搜索到小区标识为第一CCC小区的小区标识的小区，则确定搜索到第一CCC小区。
在一种实施方式中，上述第一CCC小区处于低负载状态。
示例性地，上述第一CCC小区处于低负载状态可以是指第一CCC小区的资源块(resource block，RB)的占用率小于设定阈值的CCC小区，例如第一CCC小区的RB的占用率小于30％。示例性地，上述第一CCC小区处于低负载状态也可以指的是第一CCC小区的RRC连接用户数小于设定阈值，例如第一CCC小区的RRC连接用户数小于600。
示例性地，上述第一CCC小区处于低负载状态可以理解为上述第一CCC小区的负载小于上述BCC小区的负载。
示例性地，上述广播消息可以包括与上述BCC关联的多个CCC小区的信息，上述第一CCC小区为上述多个CCC小区中CCC小区的信息中携带指示信息的一个。示例性地，上述广播消息中可以包括多个指示信息，上述多个指示信息可以分别包含在上述多个CCC小区的信息中，上述多个CCC小区处于低负载状态的CCC小区，上述第一CCC小区为上述多个CCC小区中的一个。网络设备通过在处于低负载状态的多个CCC的信息中携带上述指示信息来指示终端设备驻留上述多个CCC小区中的任一个。
示例性地，在上述一个或多个CCC小区中不存在CCC小区的信息中包括指示信息的第一CCC小区的情况下，终端设备可以选择上述BCC小区进行驻留，也可以选择与上述BCC小区关联的一个或多个CCC小区中的任一个CCC小区进行驻留，本申请不做限定。
在一种实施方式中，在上述一个或多个CCC小区中不存在CCC小区的信息中包括指示信息的第一CCC小区的情况下，终端设备确定上述BCC小区的负载状态。在上述BCC小区处于低负载状态的情况下，终端设备选择上述BCC小区进行驻留。在上述BCC小区处于高负载状态的情况下，终端设备根据广播消息中包括的CCC小区的信息搜索上述一个或多个CCC小区。在搜索到一个满足上述小区选择准则的CCC小区的情况下，确定驻留该CCC小区。
803，终端设备根据小区选择准则确定是否驻留上述第一CCC小区。
示例性地，终端设备搜索到上述第一CCC小区，即终端设备接收到第一CCC小区广播的广播消息，例如DRS。终端设备在接收到第一CCC小区的DRS后，对第一CCC小区的DRS进行测量，得到第一CCC小区的DRS的RSRP和RSRQ。
示例性地，上述第一CCC小区的信息还包括第一CCC小区的接入信息。上述第一CCC小区的接入信息包括第一CCC小区的小区选择参数。终端设备根据上述DRS的RSRP和RSRQ以及第一CCC小区的小区选择参数计算第一CCC小区的S1和S2。在第一CCC小区的S1和S2满足S1>0且S2>0的情况下，确定第一CCC小区满足上述小区选择准则。
示例性地，在上述第一CCC小区满足上述小区选择准则的情况下，终端设备确定驻留第一CCC小区。在上述第一CCC小区不满足上述小区选择准则的情况下，终端设备确定不驻留第一CCC小区。
示例性地，在终端设备在确定不驻留上述第一CCC小区的情况下，终端设备搜索上述一个或多个CCC小区中CCC小区的信息中包括上述指示信息的CCC小区。若上述CCC小区的信息中包括上述指示信息的CCC小区中存在满足上述小区选择准则的第二CCC小区，则 终端设备确定驻留该第二CCC小区。
示例性地，在上述CCC小区的信息中包括上述指示信息的CCC小区中不存在上述满足小区选择准则的第二小区的情况下，终端设备可以确定驻留上述BCC小区，也可以搜索上述一个或多个CCC小区中CCC小区的信息不包括上述指示信息的第三CCC小区，并根据小区选择准则确定是否驻留上述第三CCC小区。
在本申请实施例中，终端设备可以通过第一CCC小区的信息中携带的指示信息确定可以驻留第一CCC小区。可以理解的是，上述第一CCC小区为网络设备确定适合终端设备驻留的小区，例如第一CCC小区处于低负载状态，或者第一CCC小区所受的干扰较小。终端设备通过在CCC小区的信息中携带指示信息可以更精确地获知合适的、可以驻留的小区，使得终端设备驻留到合适的小区，以保证终端设备与网络设备之间的通信质量。
请参见图9，图9为本申请实施例提供的另一种小区选择方法的流程示意图。也可以理解为是上述图8中的小区选择方法的补充或变形。如图9所示，该小区选择方法包括但不限于如下步骤。
901，搜索BCC小区并接收广播消息。
上述BCC小区满足小区选择准则。步骤901的具体说明可以参考步骤801的相关描述，在此不再详述。
902，搜索指示信息对应的至少一个CCC小区。若搜索未结束，则指示步骤904；若搜索结束，则执行步骤905。
示例性的，上述指示信息包含在上述广播消息中，上述指示信息用于指示终端设备驻留上述至少一个CCC小区中的任一个。上述CCC小区与上述BCC小区关联的CCC小区。
在一种实施方式中，上述指示信息中可以包括上述至少一个CCC小区的标识信息，终端设备可以通过指示信息中包括的至少一个CCC小区的标识信息确定可以驻留上述至少一个CCC小区中的任一个。
在另一种实施方式中，上述广播消息包括上述至少一个CCC小区的信息，上述指示信息可以包括至少一个指示信息。示例性地，上述至少一个CCC小区的每一个CCC小区的信息中可以包括一个指示信息。终端设备通过上述至少一个CCC小区的信息中携带的指示信息确定可以驻留到上述至少一个CCC小区中的任一个。
903，搜索到的一个CCC小区是否满足小区选择准则。若是，则指示步骤904；若否，则继续执行步骤902。
904，确定驻留该CCC小区。
905，确定驻留该BCC小区。
终端设备在完成对上述至少一个CCC小区的搜索，确定上述至少一个CCC小区均不满足小区选择准则的情况下，确定驻留上述BCC小区。
可以理解的是，上述广播信息中还可以包括第四CCC小区，上述第四CCC小区的信息中不包括上述指示信息。终端设备在搜索完上述至少一个CCC小区，确定上述至少一个CCC小区均不满足上述小区选择准则的情况下，可以继续搜索第四CCC小区，并根据小区选择准则确定是否驻留上述第四CCC小区。
可以理解的是，上述至少一个CCC小区为网络设备确定适合终端设备驻留的小区，例如至少一个CCC小区处于低负载状态，或者至少一个CCC小区所受的干扰较小。在本申请实施例中，终端设备可以通过指示信息确定可以驻留的至少一个CCC小区，并根据小区选择准则确定是否驻留上述至少一个CCC小区，使得终端设备驻留到合适的小区，以保证终端设备 与网络设备之间的通信质量。
在多载波网络的节能架构中，CCC小区的系统信息由其关联的BCC小区广播。终端设备在进行小区重选时，若搜索到一个满足小区重选准则的CCC邻区，不能直接重选到该CCC邻区，而是需要确保可以接收到该CCC邻区关联的BCC小区的广播消息。在终端设备确定能够接收到该CCC邻区关联的BCC小区的广播消息，确定可以重选到上述CCC邻区。因此，在终端设备搜索到一个满足小区重选准则的CCC邻区之后，需要进一步搜索该CCC邻区关联的BCC小区。本申请实施例提供一种小区重选方法，能够快速搜索到与CCC邻区关联的BCC小区。
请参见图10，图10为本申请实施例提供的一种小区重选方法的流程示意图。如图10所示，该小区重选方法包括但不限于如下步骤。
1001，终端设备接收网络设备发送的广播消息，所述广播消息包括服务小区的邻区信息，所述邻区信息包括CCC小区的信息以及所述CCC小区的关联的BCC小区的信息。
示例性地，上述广播小区是由终端设备的服务小区广播的。上述CCC小区为终端设备的服务小区的邻区，上述BCC小区为上述CCC小区关联的BCC小区。
示例性地，上述CCC小区的信息包括CCC小区的标识以及上述CCC小区的小区重选参数。上述CCC小区的标识可以包括CCC小区的PCI或者小区标识(cell identity)，上述小区重选参数可以包括Q offset、Q offsettemp,n、Q hyst以及Q offsettemp,s。
示例性地，上述BCC小区的信息包括BCC小区的标识，例如BCC小区的PCI或者小区标识。示例性地，上述BCC小区的信息还可以包括BCC小区的频道编号。
1002，终端设备根据所述BCC小区的信息以及小区重选准则，确定重选到所述CCC小区。
示例性地，在同频小区重选中，上述小区重选准则包括：在规定时间间隔内，若R值最大的同频邻区的R值保持大于服务小区的R值，则重选到上述R值最大的同频邻区。
在同优先级异频小区重选中，上述小区重选准则包括：在规定时间间隔内，若R值最大的同优先级异频邻区的R值保持大于服务小区的R值，则重选到上述R值最大的同优先级异频邻区。
在低优先级异频小区重选中，上述小区重选准则包括：在规定时间间隔内，若一个低优先级异频邻区的广播消息的S1保持大于门限值Th x,low,p，且服务小区的S1小于门限值Th s,low,p，或者该低优先级异频邻区的广播消息的S2保持大于门限值Th x,low,q，且服务小区的S2小于门限值Th s,low,q，则确定重选到该低优先级异频邻区。
在高优先级异频小区重选中，上述小区重选准则包括：在规定时间间隔内，若一个高优先级异频邻区的广播消息的S1保持大于门限值Th x,high,p，或者该高优先级异频邻区的S2保持大于门限值Th x,high,q，则重选到该高优先级异频邻区。
需要说明的是，上述小区重选准则仅为示例，随着标准技术的演进，小区重选准则可能会发生变化，在该情况下，同样适用于本申请实施例提供的方法。因此，不应将上文所示的小区重选准则理解为对本申请实施的限定。
示例性地，由于上述CCC小区只广播DRS，CCC小区的系统信息由上述BCC小区广播，因此终端设备要重选到上述CCC小区，需要确保能够接收到BCC小区广播的广播消息，BCC小区广播的广播消息中包括上述CCC小区的系统信息。终端设备根据上述BCC小区的信息以及小区重选准则确定是否重选到上述CCC小区。
在一种实施方式中，上述根据BCC小区的信息以及小区重选准则，确定重选到所述CCC 小区，包括但不限于如下步骤：
根据所述CCC小区的信息搜索所述CCC小区；
在所述CCC小区满足所述小区重选准则的情况下，根据所述BCC小区的信息搜索所述BCC小区；
在搜索到所述BCC小区的情况下，确定重选到所述CCC小区。
示例性地，上述CCC小区的信息包括CCC小区的标识、频道编号以及上述CCC小区的小区重选参数。终端设备根据上述CCC小区的信息搜索CCC小区，例如在与CCC小区的频道编号对应的频道上搜索小区标识为CCC小区的小区标识的小区。若终端设备在上述频道上搜索到小区标识为CCC小区的小区标识的小区，则确定搜索到CCC小区。
示例性地，终端设备搜索到上述CCC小区，即终端设备接收到CCC小区广播的广播消息，例如DRS。终端设备在接收到CCC小区的DRS后，对CCC小区的DRS进行测量，得到CCC小区的DRS的RSRP和RSRQ。
终端设备根据上述CCC小区的DRS的RSRP和RSRQ以及上述小区重选参数确定上述CCC小区是否满足上述小区重选准则。
在上述CCC小区满足上述小区重选准则的情况下，终端设备根据上述BCC小区的信息搜索上述BCC小区。
示例性地，所述BCC小区的信息包括所述BCC小区的标识和/或所述BCC小区的频道编号。终端设备根据上述BCC小区的信息搜索BCC小区，例如在与BCC小区的频道编号对应的频道上搜索小区标识为BCC小区的小区标识的小区。若终端设备在上述频道上搜索到小区标识为BCC小区的小区标识的小区，则确定搜索到BCC小区。在本申请实施例中，上述BCC小区的信息包括BCC小区的标识和/或BCC小区的频道编号，终端设备可以根据BCC小区的标识或者BCC小区的频道编号快速搜索到上述BCC小区，从而减少BCC小区的搜索时间。
在终端设备搜索到上述BCC小区，即终端设备接收到上述BCC小区的广播消息的情况下，确定重选到上述CCC小区。终端设备在搜索到上述BCC小区之后，若从上述BCC小区的广播消息中获取到上述CCC小区的系统信息，则重选到上述CCC小区。
在本申请实施例中，由于上述CCC小区的系统信息由上述BCC小区广播，因此终端设备确定重选到CCC小区之前，需要确定搜索到上述BCC小区。终端设备根据上述CCC小区的信息搜索CCC小区，在CCC小区满足小区重选准则的情况下，再根据上述BCC小区的信息搜索BCC小区，在搜索到上述BCC小区的情况下，终端设备确定重选到CCC小区。终端设备根据上述CCC小区的信息和上述BCC小区的信息搜索分别搜索CCC小区和BCC小区，可以快速搜索到上述CCC小区和BCC小区，减少CCC小区和BCC的搜索时间，从而提高小区重选的效率。
在一种实施方式中，上述确定重选到所述CCC小区，包括如下步骤：
在上述BCC小区的参考信号接收功率RSRP大于第一阈值以及上述BCC小区的参考信号接收质量RSRQ大于第二阈值的情况下，确定重选到上述CCC小区。
终端设备搜索到上述BCC小区，即终端设备接收到上述BCC小区的广播消息。示例性地，上述第一阈值为上述BCC小区的广播消息的RSRP的门限值，上述第二阈值为上述BCC小区的广播消息的RSRQ的门限值。终端设备在接收到上述BCC小的广播消息之后，对BCC小区的广播消息进行测量，得到BCC小区的广播消息的RSRP和RSRQ。在终端设备接收到的BCC小区的广播消息的RSRP大于第一阈值且BCC小区的广播消息的RSRQ大于第二阈 值的情况下，终端设备能够从上述广播消息中获取到CCC小区的系统信息。因此，在上述BCC小区的广播消息的参考信号接收功率RSRP大于第一阈值以及上述BCC小区的广播消息的参考信号接收质量RSRQ大于第二阈值的情况下，终端设备确定重选到上述CCC小区。
示例性地，在上述BCC小区的广播消息的参考信号接收功率RSRP大于第一阈值以及上述BCC小区的广播消息的参考信号接收质量RSRQ大于第二阈值的情况下，上述BCC小区满足小区选择准则，即上述BCC小区的S1和S2满足S1>0且S2>0。其中，BCC小区的S1和S2的计算公式参见前述小区选择的相关描述。
示例性地，上述BCC小区的广播消息中包括BCC小区的小区重选参数。上述第一阈值和第二阈值可以由BCC小区的小区选择参数确定。例如，上述第一阈值可以为Q rxlevmin、Q rxlevminoffset、P compensation以及Q offsettemp的和。上述第二阈值可以为Q qualmin、Q qualminoffset以及Q offsettemp的和。
在本申请实施例中，上述CCC小区的系统信息由上述BCC小区广播。在所述BCC小区的参考信号接收功率RSRP大于第一阈值以及所述BCC小区的参考信号接收质量RSRQ大于第二阈值的情况下，终端设备能够从BCC小区的广播消息中获取CCC小区的系统信息，终端设备确定重选到上述CCC小区，从而保证小区重选的顺利进行。
示例性地，上述CCC小区满足上述小区重选准则可以包括如下几种情况：
情况一：在所述CCC小区为所述服务小区的同频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：
所述CCC小区为所述服务小区的同频邻区中R值最大的小区；且所述CCC小区的R值大于所述服务小区的R值的持续时长大于或等于第一时长；
其中，所述CCC小区的R值是根据所述CCC小区的参考信号接收功率RSRP确定的，所述服务小区的R值是根据所述服务小区的RSRP确定的。
示例性地，上述第一时长可以为网络设备配置的一个时长，也可以是由协议规定的时长。
上述服务小区的R值的计算公式如下：
R＝Qs+Q hyst-Q offsettemp,s
其中，Qs为服务小区的SSB的RSRP，Q hyst为服务小区的滞后量(hysteresis)，Q offsettemp,s为服务小区的偏移量。示例性地，上述广播消息由服务小区广播，上述Qs可以为上述广播消息的RSRP，即上述Qs可以由终端设备对上述广播消息进行测量得到。
上述CCC小区的R值的计算公式如下：
R＝Qn-Q offset-Q offsettemp,n
其中，上述Qn为上述CCC小区的DRS的RSRP，Q o ff set为上述CCC小区的相对服务小区的偏移量，Q offsettemp,n为上述CCC小区的偏移量。Q offset和Q offsettemp,n包含在服务小区的系统信息中。
示例性地，上述广播消息中包括服务小区的多个同频邻区的信息。终端设备根据上述多个同频邻区的信息搜索上述多个同频邻区，并按照上述CCC小区的R值的计算公式计算上述多个同频邻区的R值。上述CCC小区为上述多个同频邻区中R值最大的小区。
终端设备在计算得到上述CCC小区的R值和上述服务小区的R值之后，若上述CCC小区的R值大于服务小区的R值的持续时长大于或等于上述第一时长，则确定上述CCC小区满足上述小区重选准则。
情况二：在所述CCC小区为所述服务小区的同优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：
所述CCC小区为所述服务小区的同优先级异频邻区中R值最大的小区，且所述CCC小区的R值大于所述服务小区的R值的持续时长大于或等于第二时长；
其中，所述CCC小区的R值是根据所述CCC小区的参考信号接收功率RSRP以及所述CCC小区的偏移量确定的，所述服务小区的R值是根据所述服务小区的RSRP、所述服务小区的偏移量以及滞后量确定的。
示例性地，上述第二时长可以为网络设备配置的一个时长，也可以是由协议规定的时长。
上述服务小区的R值的计算公式如下：
R＝Qs+Q hyst-Q offsettemp,s
Qs为服务小区的SSB的RSRP，Q hyst为服务小区的滞后量(hysteresis)，Q offsettemp,s为服务小区的偏移量。示例性地，上述广播消息由服务小区广播，上述Qs可以为上述广播消息的RSRP，即上述Qs可以由终端设备对上述广播消息进行测量得到。
上述CCC小区的R值的计算公式如下：
R＝Qn-Q offset-Q offsettemp,n
其中，上述Qn为上述CCC小区的DRS的RSRP，Q offset为上述CCC小区的相对服务小区的偏移量，Q offsettemp,n为上述CCC小区的偏移量。Q offset和Q offsettemp,n包含在服务小区的系统信息中。
示例性地，上述广播消息中包括服务小区的多个同优先级异频邻区的信息。终端设备根据上述多个同优先级异频邻区的信息搜索上述多个同优先级异频邻区，并按照上述CCC小区的R值的计算公式计算上述多个同优先级异频邻区的R值。上述CCC小区为上述多个同优先级异频邻区中R值最大的小区。
终端设备在计算得到上述CCC小区的R值和上述服务小区的R值之后，若上述CCC小区的R值大于服务小区的R值的持续时长大于上述第二时长，则确定上述CCC小区满足上述小区重选准则。
情况三：在所述CCC小区为所述服务小区的低优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：
所述CCC小区的RSRP大于第三阈值且所述服务小区的RSRP小于第四阈值的持续时长大于或等于第三时长；
或者，所述CCC小区的参考信号接收质量RSRQ大于第五阈值且所述服务小区的RSRQ小于第六阈值的持续时长大于或等于第四时长。
示例性地，上述第三时长可以为网络设备配置的一个时长，也可以是由协议规定的时长，上述第四时长可以为网络设备配置的一个时长，也可以是由协议规定的时长。示例性地，上述第三时长和上述第四时长可以相等。
上述第三阈值为上述CCC小区的广播消息(例如DRS)的RSRP的小区重选门限值。上述第四阈值为上述服务小区的广播消息(例如DRS或者SSB)的RSRP的小区重选门限值。在第三时间段内，上述CCC小区的DRS的RSRP保持大于上述第三阈值，且上述服务小区的广播消息的RSRP保持小于上述第四阈值，则确定上述CCC小区满足上述小区重选准则。上述第三时间段的长度大于或等于上述第三时长。示例性地，上述第三时间段的起始时刻可以为终端设备搜索到上述CCC小区的时刻。
上述第五阈值为上述CCC小区的广播消息(例如DRS)的RSRQ的小区重选门限值。上述第六阈值为上述服务小区的广播消息(例如DRS或者SSB)的RSRQ的小区重选门限值。在第四时间段内，上述CCC小区的DRS的RSRQ保持大于上述第五阈值，且上述服务小区 的广播消息的RSRQ保持小于上述第六阈值，则确定上述CCC小区满足上述小区重选准则。示例性地，上述第四时间段的长度大于或等于上述第四时长。示例性地，上述第四时间段的起始时刻可以为终端设备搜索到上述CCC小区的时刻。
示例性地，在上述CCC小区满足上述小区重选准则的情况下，CCC小区至少满足以下两种情况中的一种：
条件一：服务小区S1<Th s,low,p且CCC小区在第三时间段内保持S1>Th x,low,p，
条件二：服务小区S2<Th s,low,q且CCC小区在第四时间段内保持S2>Th x,low,q，
其中，上述服务小区的S1、CCC小区的S1、服务小区的S2以及CCC小区的S2的计算公式参见前述小区选择的相关描述。Th s,low,p，Th x,low,p，Th s,low,q，Th x,low,q表示相应的门限值，这些参数可以包含在上述广播消息中。
示例性地，上述第三阈值可以由上述CCC小区的小区重选参数确定。上述CCC小区的小区重选参数包含在上述CCC小区的信息中，上述CCC小区的小区重选参数包括Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th x,low,p。上述CCC小区的S1大于Th x,low,p，即CCC小区的RSRP大于CCC小区的Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th x,low,p的和，上述第三阈值可以为Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th x,low,p的和。
示例性地，上述第四阈值可以由上述服务小区的小区选择参数确定。上述服务小区的小区重选参数可以包含在上述广播消息中。上述服务小区的小区重选参数包括Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th s,low,p。上述服务小区的S1小于Th s,low,p，即服务小区的RSRP小于服务小区的Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th s,low,p。上述第四阈值可以为上述服务小区的Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th s,low,p的和。
示例性地，上述第五阈值可以由上述CCC小区的小区重选参数确定。上述CCC小区的小区重选参数还可以包括CCC小区的Q qualmin、Q qualminoffset、Q offsettemp以及Th x,low,q。上述CCC小区的S2在第四时间段内大于Th x,low,q，即在第四时间段内CCC小区的RSRQ大于Q qualmin、Q qualminoffset、Q offsettemp以及Th x,low,q的和。上述第五阈值可以为Q qualmin、Q qualminoffset、Q offsettemp以及Th x,low,q的和。
示例性地，上述第六阈值可以由服务小区的小区重选参数确定，上述服务小区的小区重选参数还可以包括服务小区的Q qualmin、Q qualminoffset、Q offsettemp以及Th s,low,q。上述服务小区小于Th s,low,q，即服务小区的RSRQ小于Q qualmin、Q qualminoffset、Q offsettemp以及Th s,low,q的和。上述第六阈值可以为Q qualmin、Q qualminoffset、Q offsettemp以及Th s,low,q的和。
情况四：在所述CCC小区为所述服务小区的高优先级异频邻区的情况下，所述CCC小区满足所述小区重选准则，包括：
所述CCC小区的RSRP大于第七阈值的持续时长大于或等于第五时长；
或者，所述CCC小区的RSRQ大于第八阈值的持续时长大于或等于第六时长。
示例性地，上述第五时长可以为网络设备配置的一个时长，也可以是由协议规定的时长。上述第六时长可以为网络设备配置的一个时长，也可以是由协议规定的时长。
上述第七阈值为上述CCC小区的DRS的RSRP的门限值。在CCC小区为服务小区的高优先级异频邻区的情况下，若CCC小区的RSRP在第五时间段内保持大于上述第七阈值，则确定上述CCC小区满足上述小区重选准则。示例性地，上述第五时间段的长度大于或等于上述第五时长。示例性地，上述第五时间段的起始时刻可以为终端设备搜索到上述CCC小区的时刻。
上述第八阈值为上述CCC小区的DRS的RSRQ的门限值。在CCC小区为服务小区的高 优先级异频邻区的情况下，若上述CCC小区的RSRQ在第六时间段内保持大于上述第八阈值，则确定上述CCC小区满足小区重选准则。示例性地，上述第六时间段的长度大于或等于上述第六时长。示例性地，上述第六时间段的起始时刻可以为终端设备搜索到上述CCC小区的时刻。
示例性地，在上述CCC小区满足上述小区重选准则的情况下，上述CCC小区的满足以下条件之一：
条件一：CCC小区在第五时间段内保持S1>Th x,high,p，
条件二：CCC小区在第六时间段内保持S2>Th x,high,q，
示例性地，上述第七阈值可以由上述CCC小区的小区重选参数确定。上述CCC小区的小区重选参数包含在上述CCC小区的信息中，上述CCC小区的小区重选参数包括Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th x,high,p。上述CCC小区在第五时间段内保持S1大于Th x,high,p，即在第五时间段内CCC小区的RSRP大于CCC小区的Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th x,high,p的和，上述第七阈值可以为Q rxlevmin、Q rxlevminoffset、P compensation、Q offsettemp以及Th x,high,p的和。
示例性地，上述第八阈值可以由上述CCC小区的小区重选参数确定。上述CCC小区的小区重选参数还可以包括CCC小区的Q qualmin、Q qualminoffset、Q offsettemp以及Th x,high,q。上述CCC小区的S2在第六时间段内大于Th x,high,q，即在第六时间段内CCC小区的RSRQ大于Q qualmin、Q qualminoffset、Q offsettemp以及Th x,high,q的和。上述第五阈值可以为Q qualmin、Q qualminoffset、Q offsettemp以及Th x,high,q的和。
在本申请实施例中，上述广播消息包括服务小区的邻区信息，邻区信息中包括CCC小区的信息以及与CCC小区关联的BCC小区的信息，上述CCC小区为服务小区的邻区。终端设备可以根据上述BCC小区的信息，可以快速确定与上述CCC小区关联的BCC小区，从而提高小区重选的效率。
请参见图11，图11为本申请实施例提供的另一种小区重选方法的流程示意图。如图11所示，该小区重选方法包括但不限于如下步骤。
1101，终端设备接收网络设备发送的广播消息，所述广播消息包括服务小区的邻区信息。
示例性地，上述广播消息由终端设备的服务小区广播的。上述邻区信息包括上述服务小区的至少一个邻区的信息。终端设备可以根据上述至少一个邻区的信息搜索并测量上述至少一个邻区，以便进行小区重选。
1102，确定满足小区重选准则的第一邻区。
示例性地，上述小区重选准则可以参见图10中的相关描述。
示例性地，上述第一邻区为上述至少一个邻区中满足上述小区重选准则的邻区。上述多个邻区中的任一个邻区的信息中包括该邻区的小区标识以及该邻区的小区重选参数。终端设备根据上述至少一个邻区的每一个邻区的标识搜索并测量该邻区，并根据该邻区的小区重选参数确定该邻区是否满足上述小区重选准则。
示例性地，上述第一邻区满足小区重选准则可以参见图10所描述的CCC小区满足小区重选准则的相关描述。
1103，在上述第一邻区为CCC小区的情况下，搜索与第一邻区关联的BCC小区。
示例性地，在上述第一邻区为CCC小区的情况下，终端设备需要确定能够接收到第一邻区关联的BCC小区的广播消息，以获取上述第一邻区的系统信息。因此在上述第一邻区为 CCC小区的情况下，终端设备根据上述BCC小区的信息搜索上述BCC小区。终端设备在接收到上述BCC小区的广播消息且从BCC小区的广播消息中获取上述第一邻区的系统信息的情况下，确定重选到上述第一邻区。
示例性地，在上述第一邻区为CCC小区的情况下，上述第一邻区的信息中还包括与第一邻区关联的BCC小区的信息。终端设备根据上述BCC小区的信息搜索上述BCC小区。
示例性地，上述BCC小区的信息包括BCC小区的标识、频道编号以及上述CCC小区的小区重选参数。终端设备根据上述BCC小区的信息搜索BCC小区，例如在与BCC小区的频道编号对应的频道上搜索小区标识为BCC小区的小区标识的小区。若终端设备在上述频道上搜索到小区标识为BCC小区的小区标识的小区，则确定搜索到BCC小区。
在一种实施方式中，在上述BCC小区的参考信号接收功率RSRP大于第九阈值以及上述BCC小区的参考信号接收质量RSRQ大于第十阈值的情况下，确定搜索到BCC小区。
示例性地，上述第九阈值为上述BCC小区的广播消息的RSRP的门限值，上述第十阈值为上述BCC小区的广播消息的RSRQ的门限值。终端设备在接收到上述BCC小的广播消息之后，对BCC小区的广播消息进行测量，得到BCC小区的广播消息的RSRP和RSRQ。在终端设备接收到的BCC小区的广播消息的RSRP大于第九阈值且BCC小区的广播消息的RSRQ大于第十阈值的情况下，终端设备能够从上述BCC小区的广播消息中获取到第一邻区的系统信息。因此，在上述BCC小区的广播消息的参考信号接收功率RSRP大于第九阈值以及上述BCC小区的广播消息的参考信号接收质量RSRQ大于第十阈值的情况下，终端设备确定搜索到上述BCC小区。
示例性地，在上述BCC小区的广播消息的参考信号接收功率RSRP大于第九阈值以及上述BCC小区的广播消息的参考信号接收质量RSRQ大于第十阈值的情况下，上述BCC小区满足小区选择准则，即上述BCC小区的S1和S2满足S1>0且S2>0。其中，BCC小区的S1和S2的计算公式参见前述小区选择的相关描述。
示例性地，上述BCC小区的广播消息中包括BCC小区的小区重选参数。上述第九阈值和第十阈值可以由BCC小区的小区选择参数确定。例如，上述第九阈值可以为Q rxlevmin、Q rxlevminoffset、P compensation以及Q offsettemp的和。上述第十阈值可以为Q qualmin、Q qualminoffset以及Q offsettemp的和。
1104，在搜索到上述BCC小区的情况下，确定重选到上述第一邻区。
示例性地，终端设备在搜索到上述BCC小区，即接收到上述BCC小区的广播消息之后，从上述BCC小区的广播消息中获取上述第一邻区的系统信息，确定重选到上述第一邻区。
示例性地，终端设备在确定重选到上述第一邻区之前，还需要确定上述第一邻区满足网络归属准则和小区可用准则。终端设备在确定上述第一邻区满足网络归属准则以及小区可用准则的情况下，确定重选到上述第一邻区。
在终端设备不能搜索到上述BCC小区或者不能从上述BCC小区的广播消息中获取第一邻区的系统信息的情况下，终端设备确定不重选到上述第一邻区。
示例性地，在上述第一邻区不为CCC小区的情况下，终端设备确定重选到上述第一邻区。在上述第一邻区不为CCC小区的情况下，上述第一邻区的系统信息由第一邻区广播，因此终端设备可以直接重选到第一邻区。
在本申请实施例中，广播消息包括服务小区的多个邻区的信息，终端设备对服务小区的邻区进行搜索并测量，从上述多个邻区中确定满足小区重选条件的第一邻区。在第一邻区为CCC小区的情况下，第一邻区的信息中包括与第一邻区关联的BCC小区的信息。终端设备 可以根据上述BCC小区的信息，可以快速确定与上述第一邻区关联的BCC小区，减少BCC小区的搜索时间，从而提高小区重选的效率。
请参见图12，图12为本申请实施例提供的另一种小区重选方法的流程示意图，也可以理解为是上述图11中的小区重选方法的补充或变形。该小区重选方法可以应用于同频小区重选过程中，如图12所示，该小区重选方法包括但不限于如下步骤。
1201，搜索并测量至少一个同频邻区。
示例性地，上述至少一个同频邻区为终端设备的服务小区的同频邻区。终端设备可以接收服务小区的广播消息，该广播消息中携带上述至少一个同频邻区的信息。终端设备根据该至少一个同频邻区的信息搜索上述至少一个同频邻区。对于搜索到的每一同频邻区，终端设备测量该同频邻区的信号强度，例如测量该同频邻区的广播消息的RSRP和RSRQ。
1202，对至少一个同频邻区进行排序。
示例性地，终端设备按照小区重选优先级对上述至少一个同频邻区进去排序。
示例性地，上述小区重选优先级可以由小区的R值表示。终端设备搜索上述至少一个同频邻区，并计算每一个同频邻区的R值。同频邻区的R值的计算可以参考上文，这里不再详述。
终端设备计算每个同频邻区的R值之后，按照R值的大小对上述至少一个同频邻区进行排序。
1203，第一同频邻区是否满足小区重选准则。若是，则执行步骤1204；若否，则继续执行步骤1201。
该第一同频邻区为上述至少一个同频邻区中R值最大的一个同频邻区。上述小区重选准则可以参见上文的相关描述，这里不再详述。
1204，第一同频邻区为CCC小区。若是，则执行步骤1205；若否，则执行步骤1207。
1205，搜索第一同频邻区关联的BCC小区。
该第一同频邻区的信息中包括与第一同频邻区关联的BCC小区的信息。终端设备根据上述BCC小区的信息搜索上述BCC小区。
1206，是否搜索到上述BCC小区。若是，则执行步骤1207；若否，则继续执行步骤1201。
1207，确定重选到第一同频邻区。
图12中各个步骤的具体说明可以参见图10、图11的相关描述，此处不再赘述。
在本申请实施例中，在第一同频邻区为CCC小区的情况下，第一同频邻区的信息中包括与第一同频邻区关联的BCC小区的信息。终端设备可以根据上述BCC小区的信息，可以快速确定与上述第一同频邻区关联的BCC小区，减少BCC小区的搜索时间，从而提高小区重选的效率。
请参见图13，图13为本申请实施例提供的另一种小区重选方法的流程示意图，也可以理解为是上述图11中的小区重选方法的补充或变形。该小区重选方法可以应用于异频小区重选过程中，如图13所示，该小区重选方法包括但不限于如下步骤。
1301，搜索并测量异频邻区。
示例性地，该异频邻区为服务小区的异频邻区。服务小区广播的消息中包括该异频邻区的信息，终端设备可以通过服务小区广播的广播消息获取上述异频邻区的信息。
1302，该异频邻区是否满足小区重选准则。若是，则执行步骤1303；若否，则继续执行步骤1301。
1303，该异频邻区是否为CCC小区。若是，则执行步骤1304；若否，则执行步骤1306。
1304，搜索该异频邻区关联的BCC小区。
示例性地，在该异频邻区为CCC小区的情况下，该异频邻区的信息中包括上述BCC小区的信息。终端设备可以根据上述BCC小区的信息快速搜索上述BCC小区。
1305，是否搜索到上述BCC小区。若是，则执行步骤1306；若否，则继续执行步骤1301。
1306，确定重选到该异频邻区。
图13中各个步骤的具体说明可以参见图10、图11的相关描述，此处不再赘述。
在本申请实施例中，在异频邻区为CCC小区的情况下，该异频邻区的信息中包括与该异频邻区关联的BCC小区的信息。终端设备可以根据上述BCC小区的信息，可以快速确定与上述异频邻区关联的BCC小区，减少BCC小区的搜索时间，从而提高小区重选的效率。
上述详细阐述了本申请实施例的方法，下面提供了本申请实施例的装置。
本申请根据上述方法实施例对通信装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。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。需要说明的是，本申请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。下面将结合图14至图16详细描述本申请实施例的通信装置。
图14是本申请实施例提供的一种通信装置的结构示意图，如图14所示，该通信装置140包括处理模块1401、收发模块1402。
在本申请的一些实施例中，该通信装置可以是上文示出的终端设备。即图14所示的通信装置可以用于执行上文方法实施例中由终端设备执行的步骤或功能等。
在一种实现方式中，收发模块1402，用于接收广播消息，所述广播消息包括指示信息，所述指示信息用于指示驻留第一CCC小区，所述第一CCC小区为与BCC小区关联的CCC小区，所述BCC小区为终端设备搜索到的满足小区选择准则的BCC小区；
处理模块1401，用于根据所述指示信息及所述小区选择准则确定是否驻留所述第一CCC小区。
可选的，处理模块1401，具体用于在所述第一CCC小区不满足所述小区选择准则的情况下，确定不驻留所述第一CCC小区；或者，在所述第一CCC小区满足所述小区选择准则的情况下，确定驻留所述第一CCC小区。
可选的，处理模块1401，还用于在确定不驻留上述第一CCC小区的情况下，确定驻留所述BCC小区。
可选的，收发模块1402，具体用于在所述BCC小区处于高负载状态的情况下，接收所述广播消息。
可理解，关于该广播消息、指示消息、小区选择准则、第一CCC小区以及BCC小区等的具体说明可以参考上文所示的方法实施例，如图5、图6、图7、图8、图9所示的方法，这里不再详述。
在另一种实现方式中，收发模块1402，用于接收广播消息，所述广播消息包括服务小区的邻区信息，所述邻区信息包括CCC小区的信息以及所述CCC小区的关联的BCC小区的信息；
处理模块1401，用于根据所述BCC小区的信息以及小区重选准则，确定重选到所述CCC小区。
可选的，处理模块1401，具体用于根据所述CCC小区的信息搜索所述CCC小区；在所述 CCC小区满足所述小区重选准则的情况下，根据所述BCC小区的信息搜索所述BCC小区；在搜索到所述BCC小区的情况下，确定重选到所述CCC小区。
可理解，关于该广播消息、邻区信息、小区重选准则、CCC小区以及BCC小区等的具体说明可以参考上文所示的方法实施例，如图10、图11、图12、图13所示的方法，这里不再详述。
可理解，本申请实施例示出的收发模块和处理模块的具体说明仅为示例，对于收发模块和处理模块的具体功能或执行的步骤等，可以参考上述方法实施例，这里不再详述。示例性的，该收发模块1402还可以用于执行步骤501、步骤601、步骤701、步骤801、步骤901步骤1001以及步骤1101，处理模块1401还可以用于执行步骤502、步骤602、步骤603、步骤604、步骤702、步骤703、步骤704、步骤705、步骤706、步骤802、步骤803、步骤902、步骤903、步骤904、步骤905、步骤1002、步骤1102、步骤1103以及步骤1104。
以上介绍了本申请实施例的通信装置，以下介绍所述通信装置可能的产品形态。应理解，但凡具备上述图14所述的通信装置的功能的任何形态的产品，都落入本申请实施例的保护范围。还应理解，以下介绍仅为举例，不限制本申请实施例的通信装置的产品形态仅限于此。
图14所示的通信装置中，处理模块1401可以是一个或多个处理器，收发模块1402可以是收发器。或者，处理模块1401可以是一个或多个处理器(或者处理模块1401可以是一个或多个逻辑电路)，收发模块1402可以是输入输出接口。以下将详细说明。
在一种可能的实现方式中，图14所示的通信装置中，处理模块1401可以是一个或多个处理器，收发模块1402可以是收发器。本申请实施例中，处理器和收发器可以被耦合等，对于处理器和收发器的连接方式，本申请实施例不作限定。
如图15所示，该通信装置150包括一个或多个处理器1501和收发器1502。
在一种实现方式中，当该通信装置用于执行上述终端设备执行的步骤或方法或功能时，收发器1502，用于接收广播消息。处理器1501，用于根据所述广播消息包含的指示信息及所述小区选择准则确定是否驻留所述第一CCC小区。
可理解，关于该广播消息、指示信息、小区选择准则以及第一CCC小区等的具体说明可以参考上文所示的方法实施例，如图5、图6、图7、图8、图9所示的方法，这里不再详述。
在另一种实现方式中，当该通信装置用于执行上述终端设备执行的步骤或方法或功能时，收发器1502，用于接收广播消息，处理器1501，用于根据该广播消息确定重选到CCC小区。
可理解，关于该广播消息、CCC小区的具体说明可以参考上文所示的方法实施例，如图10、图11、图12、图13所示的方法，这里不再详述。
可理解，对于处理器和收发器的具体说明还可以参考图14所示的处理模块、收发模块的介绍，这里不再赘述。
在图15所示的通信装置的各个实现方式中，收发器可以包括接收机和发射机，该接收机用于执行接收的功能(或操作)，该发射机用于执行发射的功能(或操作)。以及收发器用于通过传输介质和其他设备/装置进行通信。
可选的，通信装置150还可以包括一个或多个存储器1503，用于存储程序指令和/或数据。存储器1503和处理器1501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1501可能和存储器1503协同操作。处理器1501可以执行存储器1503中存储的程序指令。可选的，上述一个或多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收发器1502、处理器1501以及存储器1503之间的具体连接介质。本申请实施例在图15中以存储器1503、处理器1501以及收发器1502之间通过总线1504连接，总线在图15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15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。
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、分立硬件组件等，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等。
本申请实施例中，存储器可包括但不限于硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等非易失性存储器，随机存储记忆体(Random Access Memory，RAM)、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、只读存储器(Read-Only Memory，ROM)或便携式只读存储器(Compact Disc Read-Only Memory，CD-ROM)等等。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程序代码，并能够由计算机(如本申请示出的通信装置等)读和/或写的任何存储介质，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。
处理器1501主要用于对通信协议以及通信数据进行处理，以及对整个通信装置进行控制，执行软件程序，处理软件程序的数据。存储器1503主要用于存储软件程序和数据。收发器1502可以包括控制电路和天线，控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当通信装置开机后，处理器1501可以读取存储器1503中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器1501对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到通信装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器1501，处理器1501将基带信号转换为数据并对该数据进行处理。
在另一种实现中，所述的射频电路和天线可以独立于进行基带处理的处理器而设置，例如在分布式场景中，射频电路和天线可以与独立于通信装置，呈拉远式的布置。
可理解，本申请实施例示出的通信装置还可以具有比图15更多的元器件等，本申请实施例对此不作限定。以上所示的处理器和收发器所执行的方法仅为示例，对于该处理器和收发器具体所执行的步骤可参照上文介绍的方法。
在另一种可能的实现方式中，图14所示的通信装置中，处理模块1401可以是一个或多个逻辑电路，收发模块1402可以是输入输出接口。该输入输出接口，又或者称为通信接口，或者接口电路，或接口等等。如图16所示，图16所示的通信装置包括逻辑电路1601和接口1602。即上述处理模块1401可以用逻辑电路1601实现，收发模块1402可以用接口1602实现。其中，该逻辑电路1601可以为芯片、处理电路、集成电路或片上系统(system on chip，SoC)芯片等，接口1602可以为通信接口、输入输出接口、管脚等。示例性的，图16是以上述通信装置为芯片为例出的，该芯片包括逻辑电路1601和接口1602。
本申请实施例中，逻辑电路和接口还可以相互耦合。对于逻辑电路和接口的具体连接方式，本申请实施例不作限定。
在一种实现方式中，当通信装置用于执行上述终端设备执行的方法或功能或步骤时，接口1602，用于接收广播消息。逻辑电路1601，用于根据广播消息包含的指示信息以及小区选择准则确定是否驻留所述第一CCC小区。
可理解，关于该广播消息、指示信息、小区选择准则以及第一CCC小区等的具体说明可以参考上文所示的方法实施例，如图5、图6、图7、图8、图9所示的方法，这里不再详述。
在另一种实现方式中，当通信装置用于执行上述终端设备执行的方法或功能或步骤时，接口1602，用于接收广播消息。逻辑电路1601，用于根据广播消息确定重选到所述CCC小区。
可理解，关于该广播消息、CCC小区的具体说明可以参考上文所示的方法实施例，如图10、图11、图12、图13所示的方法，这里不再详述。
可理解，本申请实施例示出的通信装置可以采用硬件的形式实现本申请实施例提供的方法，也可以采用软件的形式实现本申请实施例提供的方法等，本申请实施例对此不作限定。
对于图14所示的各个实施例的具体实现方式，还可以参考上述各个实施例，这里不再详述。
此外，本申请还提供一种计算机程序，该计算机程序用于实现本申请提供的方法中由第一通信装置执行的操作和/或处理。
本申请还提供一种计算机程序，该计算机程序用于实现本申请提供的方法中由第二通信装置执行的操作和/或处理。
本申请还提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机代码，当计算机代码在计算机上运行时，使得计算机执行本申请提供的方法中由第一通信装置执行的操作和/或处理。
本申请还提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机代码，当计算机代码在计算机上运行时，使得计算机执行本申请提供的方法中由第二通信装置执行的操作和/或处理。
本申请还提供一种计算机程序产品，该计算机程序产品包括计算机代码或计算机程序，当该计算机代码或计算机程序在计算机上运行时，使得本申请提供的方法中由第一通信装置执行的操作和/或处理被执行。
本申请还提供一种计算机程序产品，该计算机程序产品包括计算机代码或计算机程序，当该计算机代码或计算机程序在计算机上运行时，使得本申请提供的方法中由第二通信装置执行的操作和/或处理被执行。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例提供的方案的技术效果。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个可读存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的可读存储介质包括：U盘、移动硬盘、只读存储器(read-only memory,ROM)、随机存取存储器(random access memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种小区选择方法，其特征在于，包括：
    接收广播消息，所述广播消息包括指示信息，所述指示信息用于指示驻留第一容量载波CCC小区，所述第一CCC小区为与基础载波BCC小区关联的CCC小区，所述BCC小区为终端设备搜索到的满足小区选择准则的BCC小区；
    根据所述指示信息及所述小区选择准则确定是否驻留所述第一CCC小区。
  2. 根据权利要求1所述的方法，其特征在于，所述第一CCC小区为所述BCC小区关联的一个或多个CCC小区中的任一个。
  3. 根据权利要求1所述的方法，其特征在于，所述指示信息包括所述第一CCC小区的标识信息。
  4. 根据权利要求1所述的方法，其特征在于，所述广播消息包括指示信息，包括：
    所述广播消息包括第一CCC小区的信息，所述指示信息包含在所述第一CCC小区的信息中。
  5. 根据权利要求4所述的方法，其特征在于，所述第一CCC小区的信息包括所述第一CCC小区的标识和所述第一CCC小区的接入信息。
  6. 根据权利要求3-5任一项所述的方法，其特征在于，所述第一CCC小区处于低负载状态。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述广播消息还包括所述BCC小区的信息。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述根据所述指示信息及小区选择准则确定是否驻留所述第一CCC小区，包括：
    在所述第一CCC小区不满足所述小区选择准则的情况下，确定不驻留所述第一CCC小区；或者，
    在所述第一CCC小区满足所述小区选择准则的情况下，确定驻留所述第一CCC小区。
  9. 根据权利要求8所述的方法，其特征在于，所述确定不驻留所述第一CCC小区之后，所述方法还包括：
    确定驻留所述BCC小区。
  10. 根据权利要求1-9任一项所述的方法，其特征在于，所述接收广播消息，包括：
    在所述BCC小区处于高负载状态的情况下，接收所述广播消息。
  11. 一种小区重选方法，其特征在于，包括：
    接收广播消息，所述广播消息包括服务小区的邻区信息，所述邻区信息包括CCC小区的信息以及所述CCC小区的关联的BCC小区的信息；
    根据所述BCC小区的信息以及小区重选准则，确定重选到所述CCC小区。
  12. 根据权利要求11所述的方法，其特征在于，所述根据所述BCC小区的信息以及小区重选准则，确定重选到所述CCC小区，包括：
    根据所述CCC小区的信息搜索所述CCC小区；
    在所述CCC小区满足所述小区重选准则的情况下，根据所述BCC小区的信息搜索所述BCC小区；
    在搜索到所述BCC小区的情况下，确定重选到所述CCC小区。
  13. 根据权利要求12所述的方法，其特征在于，所述确定重选到所述CCC小区，包括：
    在所述BCC小区的参考信号接收功率RSRP大于第一阈值以及所述BCC小区的参考信号接收质量RSRQ大于第二阈值的情况下，确定重选到所述CCC小区。
  14. 根据权利要求11-13任一项所述的方法，其特征在于，所述BCC小区的信息包括所述BCC小区的标识和/或所述BCC小区的频道编号。
  15. 一种通信装置，其特征在于，包括：
    收发模块，用于接收广播消息，所述广播消息包括指示信息，所述指示信息用于指示驻留第一CCC小区，所述第一CCC小区为与BCC小区关联的CCC小区，所述BCC小区为终端设备搜索到的满足小区选择准则的BCC小区；
    处理模块，用于根据所述指示信息及所述小区选择准则确定是否驻留所述第一CCC小区。
  16. 根据权利要求15所述的通信装置，其特征在于，所述第一CCC小区为所述BCC小区关联的一个或多个CCC小区中的任一个。
  17. 根据权利要求15所述的通信装置，其特征在于，所述指示信息包括所述第一CCC小区的标识信息。
  18. 根据权利要求15所述的通信装置，其特征在于，所述广播消息包括指示信息，包括：
    所述广播消息包括第一CCC小区的信息，所述指示信息包含在所述第一CCC小区的信息中。
  19. 根据权利要求17或18所述的通信装置，其特征在于，所述第一CCC小区处于低负载状态。
  20. 根据权利要求15-19任一项所述的通信装置，其特征在于，所述广播消息还包括所述BCC小区的信息。
  21. 根据权利要求15-20任一项所述的通信装置，其特征在于，所述处理模块，具体用于 在所述第一CCC小区不满足所述小区选择准则的情况下，确定不驻留所述第一CCC小区；或者，在所述第一CCC小区满足所述小区选择准则的情况下，确定驻留所述第一CCC小区。
  22. 根据权利要求21所述的通信装置，其特征在于，所述处理模块，还用于在确定不驻留所述第一CCC小区的情况下，确定驻留所述BCC小区。
  23. 根据权利要求15-22任一项所述的通信装置，其特征在于，所述收发模块，具体用于在所述BCC小区处于高负载状态的情况下，接收所述广播消息。
  24. 一种通信装置，其特征在于，包括：
    收发模块，用于接收广播消息，所述广播消息包括服务小区的邻区信息，所述邻区信息包括CCC小区的信息以及所述CCC小区的关联的BCC小区的信息；
    处理模块，用于根据所述BCC小区的信息以及小区重选准则，确定重选到所述CCC小区。
  25. 根据权利要求24所述的通信装置，其特征在于，所述处理模块，具体用于根据所述CCC小区的信息搜索所述CCC小区；在所述CCC小区满足所述小区重选准则的情况下，根据所述BCC小区的信息搜索所述BCC小区；在搜索到所述BCC小区的情况下，确定重选到所述CCC小区。
  26. 根据权利要求25所述的通信装置，其特征在于，所述处理模块，具体用于在所述BCC小区的参考信号接收功率RSRP大于第一阈值以及所述BCC小区的参考信号接收质量RSRQ大于第二阈值的情况下，确定重选到所述CCC小区。
  27. 根据权利要求24-26任一项所述的通信装置，其特征在于，所述BCC小区的信息包括所述BCC小区的标识和/或所述BCC小区的频道编号。
  28. 一种通信装置，其特征在于，包括处理器和存储器；
    所述处理器用于存储计算机执行指令；
    所述处理器用于执行所述计算机执行指令，以使权利要求1-10任一项所述的方法被执行；或者，以使权利要求11-14任一项所述的方法被执行。
  29. 一种通信装置，其特征在于，包括逻辑电路和接口，所述逻辑电路和接口耦合；
    所述接口用于输入和/或输出代码指令，所述逻辑电路用于执行所述代码指令，以使权利要求1-10任一项所述的方法被执行；或者，以使权利要求11-14任一项所述的方法被执行。
  30. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序被执行时，权利要求1-10任一项所述的方法被执行；或者，权利要求11-14任一项所述的方法被执行。
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CN101848466A (zh) * 2009-03-25 2010-09-29 中兴通讯股份有限公司 一种多载波系统的载波选择方法
CN110351797A (zh) * 2013-10-30 2019-10-18 华为终端有限公司 一种终端驻留小区的方法、装置及移动终端
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CN101848466A (zh) * 2009-03-25 2010-09-29 中兴通讯股份有限公司 一种多载波系统的载波选择方法
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