WO2024037495A1 - 通信方法、系统、核心网网元和用户设备 - Google Patents

通信方法、系统、核心网网元和用户设备 Download PDF

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Publication number
WO2024037495A1
WO2024037495A1 PCT/CN2023/112887 CN2023112887W WO2024037495A1 WO 2024037495 A1 WO2024037495 A1 WO 2024037495A1 CN 2023112887 W CN2023112887 W CN 2023112887W WO 2024037495 A1 WO2024037495 A1 WO 2024037495A1
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Prior art keywords
indication message
plmn
network selection
selection parameter
network element
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English (en)
French (fr)
Inventor
黎明雪
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup

Definitions

  • the present disclosure relates to the field of communication technology, and in particular, to a communication method, system, core network element and user equipment (User Equipment, UE).
  • UE User Equipment
  • the UE selects a PLMN from multiple public land mobile networks (Public Land Mobile Network, PLMN) based on the preset information in the UE's subscriber identity card, and further resides in a certain cell of the PLMN to establish Data Connections.
  • PLMN Public Land Mobile Network
  • a communication method including: a core network element sending an indication message to a user equipment UE to indicate whether the UE selects a public land mobile network PLMN according to an auxiliary network selection parameter.
  • the indication message includes a first indication message, and the first indication message is used to instruct the UE to select a PLMN according to the secondary network selection parameter in the first indication message.
  • the core network element sending the indication message to the UE includes: the core network element sending the first indication message to the UE multiple times, wherein for two consecutive first indication messages sent twice, Instruction message, the auxiliary network selection parameter in the previous first indication message is different from the auxiliary network selection parameter in the subsequent first indication message.
  • the core network element sending the first indication message to the UE multiple times includes: after sending the previous first indication message, the signal quality and network load of the candidate PLMN are determined.
  • the core network element sends the latter first indication message, and the latter first indication message is used to instruct the UE to perform the following operations according to the following first indication message:
  • the auxiliary network selection parameters are used to determine whether to select the candidate PLMN.
  • the auxiliary network selection parameters include a signal threshold; when the signal quality of the candidate PLMN is less than or equal to the first predetermined quality, or when the network load of the candidate PLMN is greater than or equal to the first predetermined load , the signal threshold in the latter first indication message is greater than the signal threshold in the previous first indication message; when the signal quality of the candidate PLMN is greater than or equal to the second predetermined quality, or in the network of the candidate PLMN When the load is less than or equal to the second predetermined load, the signal threshold in the subsequent first indication message is smaller than the signal threshold in the previous first indication message.
  • the indication message includes a second indication message, the second indication message being used to instruct the UE not to select a PLMN according to the secondary network selection parameter.
  • the core network element sending the indication message to the UE includes: when the signal quality of the candidate PLMN is greater than or equal to a third predetermined quality, the core network element sends the second indication to the UE. information.
  • the core network element sends the indication message to the UE only when the UE is a data-centric UE.
  • the method further includes: the core network element receiving a registration request from the UE; the core network element obtaining the user subscription information of the UE; and the core network element according to The user subscription information determines whether the UE is a data-centric UE.
  • a communication method including: a UE receiving an indication message from a core network element; and the UE determining, according to the indication message, whether to select a PLMN according to an auxiliary network selection parameter.
  • the UE determines whether to select a PLMN according to the auxiliary network selection parameter according to the indication message, including: in the case where the indication message is a first indication message carrying the auxiliary network selection parameter, the The UE determines to select a PLMN according to the auxiliary network selection parameter, and saves the auxiliary network selection parameter.
  • the UE saves the secondary network selection parameters to a subscriber identity card in the UE.
  • the UE determines whether to select the PLMN according to the auxiliary network selection parameter according to the indication message. In the case where the indication message is a second indication message, the UE determines not to select the PLMN according to the auxiliary network selection parameter. Select Parameters Select PLMN.
  • the UE deletes the auxiliary network selection parameter if the indication message is the second indication message and the UE has saved the auxiliary network selection parameter.
  • the method further includes: in the case where it is determined to select a PLMN according to the auxiliary network selection parameter, the UE selects a PLMN according to priorities of a plurality of candidate PLMNs and the auxiliary network selection parameter.
  • the auxiliary network selection parameters include a signal threshold; the UE selecting a PLMN according to the priorities of multiple candidate PLMNs and the auxiliary network selection parameters includes: the UE determines whether to select the first priority PLMN. A candidate PLMN; when the received signal quality of at least one cell of the first candidate PLMN is greater than or equal to the signal threshold, the UE selects the first candidate PLMN; in each of the first candidate PLMN When the received signal quality of the cell is less than the signal threshold, the UE does not select the first candidate PLMN, and uses the second candidate PLMN of the second priority as the first candidate PLMN to repeat the judgment, Wherein, the level of the second priority is smaller than the level of the first priority, and the second priority and the first priority are the priorities of the plurality of candidate PLMNs in order from high to low. Two adjacent priorities in the case of sequential arrangement.
  • the UE is a data-centric UE.
  • the core network element is a mobility management function network element.
  • the indication message is a non-access stratum message.
  • the auxiliary network selection parameters include signal thresholds.
  • the signal threshold includes a signal strength threshold.
  • a communication method including: sending an indication message to a user equipment UE to indicate whether the UE selects a public land mobile network PLMN according to an auxiliary network selection parameter.
  • a core network element including: a sending module configured to send an indication message to a UE to indicate whether the UE selects a PLMN according to an auxiliary network selection parameter.
  • a core network element including: a memory; and a processor coupled to the memory, configured to execute any one of the above based on instructions stored in the memory. methods described in the examples.
  • a user equipment including: a receiving module configured to receive an indication message from a core network element; and a determining module configured to determine whether to determine whether to The auxiliary network selection parameter selects PLMN.
  • a user equipment including: a memory; and a processor coupled to the memory, configured to execute any one of the above embodiments based on instructions stored in the memory. the method described.
  • a communication system including: the core network element described in any of the above embodiments; and the user equipment described in any of the above embodiments.
  • a computer-readable storage medium including computer program instructions, wherein when the computer program instructions are executed by a processor, the method described in any of the above embodiments is implemented.
  • a computer program product including a computer program, wherein when the computer program is executed by a processor, the method described in any of the above embodiments is implemented.
  • the core network element sends an indication message to the UE to indicate whether the UE selects a PLMN according to the auxiliary network selection parameter.
  • the core network can flexibly control whether the UE selects a PLMN based on the auxiliary network selection parameters according to actual needs. In this way, the success rate of the UE in establishing the data connection can be improved while also improving the efficiency of the UE in establishing the data connection.
  • Figure 1 is a schematic flowchart of a communication method according to some embodiments of the present disclosure
  • Figure 2 is a schematic flowchart of a communication method according to other embodiments of the present disclosure.
  • Figure 3 is a schematic flowchart of a communication method according to further embodiments of the present disclosure.
  • Figure 4 is a schematic flowchart of a communication method according to further embodiments of the present disclosure.
  • Figure 5 is a schematic structural diagram of a core network element according to some embodiments of the present disclosure.
  • Figure 6 is a schematic structural diagram of a UE according to some embodiments of the present disclosure.
  • FIG. 7 is a schematic structural diagram of an electronic device according to some embodiments of the present disclosure.
  • any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values.
  • the UE selects a PLMN according to the auxiliary network selection parameters in the preset information except for the priorities of multiple PLMNs, so as to increase the possibility of the UE camping in a cell with better signal quality and improve the success of the UE in establishing a data connection. Rate.
  • the efficiency of the UE in establishing a data connection will be reduced. For example, for a PLMN with good signal quality, even if the PLMN is directly selected without selecting parameters based on the auxiliary network, the UE can still camp in a cell with good signal quality and successfully establish a data connection.
  • the UE regardless of the signal quality of the PLMN, the UE always selects the PLMN according to the auxiliary network selection parameters, thereby reducing the efficiency of the UE in establishing a data connection.
  • Embodiments of the present disclosure provide a communication method.
  • the communication method includes: sending an indication message to the UE to indicate whether the UE selects the public land mobile network PLMN according to the auxiliary network selection parameter.
  • the communication method may include, but is not limited to, being performed by core network elements.
  • An embodiment of a communication method performed by a core network element will be described below with reference to Figure 1 .
  • Figure 1 is a flowchart of a communication method according to some embodiments of the present disclosure.
  • the communication method includes step 102.
  • the core network element sends an indication message to the UE to indicate whether the UE selects a PLMN according to the secondary network selection parameters.
  • the auxiliary network parameters may include auxiliary network parameters corresponding to each candidate PLMN. In this case, indicate Whether the UE selects a PLMN based on the secondary network selection parameters, that is, indicates whether the UE determines whether to select the candidate PLMN based on the secondary network parameters corresponding to the candidate PLMN.
  • auxiliary network parameters corresponding to different candidate PLMNs may be the same or different.
  • the auxiliary network selection parameters include signal thresholds, eg, signal thresholds for received signal quality.
  • the signal threshold for received signal quality is greater than the cell selection criterion (Cell Selection Criterion, also known as the S criterion).
  • the signal threshold includes a signal strength threshold.
  • the auxiliary network parameters may include the signal strength threshold of the received signal strength corresponding to each candidate PLMN.
  • the indication message includes a first indication message, and the first indication message is used to instruct the UE to select a PLMN according to the secondary network selection parameter.
  • the core network element sends a first indication message to the UE to instruct the UE to determine whether to select the candidate PLMN based on the signal threshold corresponding to the candidate PLMN, thereby improving the success rate of the UE in establishing a data connection.
  • the indication message includes a second indication message, and the second indication message is used to instruct the UE not to select a PLMN according to the secondary network selection parameter.
  • the core network element sends a second indication message to the UE to instruct the UE not to determine whether to select the candidate PLMN based on the signal threshold corresponding to the candidate PLMN, thereby improving the efficiency of the UE in establishing a data connection.
  • the indication message is a Non Access Stratum (NAS) message.
  • NAS Non Access Stratum
  • the first indication message is a NAS message; for another example, the second indication message is a NAS message.
  • the core network element is a mobility management function element.
  • the mobility management function network element can be the Mobility Management Entity (MME) in the 4G core network or the Access and Mobility Management Function (AMF) network element in the 5G core network.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • mobility management function network element can also be other network elements with similar functions in other core networks (for example, 6G core network, etc.).
  • the core network element sends an indication message to the UE to indicate whether the UE selects a PLMN according to the auxiliary network selection parameter.
  • the core network can flexibly control whether the UE is based on actual needs.
  • the auxiliary network selection parameter selects PLMN. In this way, the success rate of the UE in establishing the data connection can be improved while also improving the efficiency of the UE in establishing the data connection.
  • auxiliary network selection parameters are burned into the user identification card when the card is produced, or are sent to the user through the user interface by the Over-the-Air Technology (OTA) platform. identification card.
  • OTA Over-the-Air Technology
  • the UE can only select a PLMN based on fixed auxiliary network selection parameters, resulting in the failure of the UE to effectively improve the success rate of establishing a data connection.
  • the present disclosure also proposes the following embodiments.
  • the indication message includes a first indication message, and the first indication message is used to instruct the UE to select a PLMN according to the secondary network selection parameters in the first indication message.
  • the first indication message carries the auxiliary network selection parameter, that is, the first indication message carries the value of the signal threshold.
  • the core network can adjust the signal threshold value corresponding to the candidate PLMN according to the actual situation such as the current signal quality of the candidate PLMN.
  • the core network element may send a first indication message to the UE to instruct the UE to determine whether to select the candidate PLMN based on the signal threshold corresponding to the candidate PLMN, thereby improving the success rate of the UE in establishing a data connection.
  • the core network element sends a first indication message to the UE to instruct the UE to select a PLMN according to the secondary network selection parameters in the first indication message.
  • the core network can control and send the auxiliary network selection parameters to the UE, so as to flexibly control the UE to select a PLMN based on different auxiliary network selection parameters. In this way, the success rate of the UE establishing a data connection can be further improved.
  • the first indication message is used to instruct the UE to set the auxiliary network selection parameters.
  • the UE before receiving the first indication message, the UE does not save the secondary network selection parameters, that is, the UE does not select the PLMN according to the secondary network selection parameters. Afterwards, the core network element sends a first indication message to the UE to instruct the UE to save the auxiliary network selection parameters in the first indication message. After saving the auxiliary network selection parameters, the UE can select a PLMN according to the saved auxiliary network selection parameters. In this way, the setting of auxiliary network selection parameters can be achieved.
  • the first indication message is used to instruct the UE to update the auxiliary network selection parameter.
  • the UE before receiving the first indication message, the UE has saved the secondary network selection parameters, that is, the UE has been able to select the PLMN according to the saved secondary network selection parameters.
  • the core network element sends a first indication message to the UE to instruct the UE to update the saved auxiliary network selection parameter to the auxiliary network selection in the first indication message. parameter.
  • the UE no longer selects a PLMN based on the previously saved secondary network selection parameters, but selects a PLMN based on the secondary network selection parameters in the first indication message. In this way, the auxiliary network selection parameters can be updated.
  • the auxiliary network selection parameters saved by the UE before receiving the first instruction message for update are burned into the user identity card when the card is produced, or are sent to the user identity card by the OTA platform through the user plane. middle.
  • the auxiliary network selection parameters saved by the UE before receiving the first indication message for update are sent by the core network element to the UE through another first indication message.
  • the core network element sends the first indication message carrying the auxiliary network selection parameter to the UE multiple times.
  • the auxiliary network selection parameter in the previous first indication message is different from the auxiliary network selection parameter in the following first indication message.
  • the previous first indication message is the first indication message sent previously among the first indication messages sent twice adjacently
  • the latter first indication message is the latter one among the first indication messages sent twice adjacently.
  • the latter first instruction message is used to instruct the UE to update the auxiliary network selection parameters.
  • the previous first indication message is used to instruct the UE to set the auxiliary network selection parameters. In other embodiments, the previous first indication message is also used to instruct the UE to update the auxiliary network selection parameters.
  • the core network element sends the first indication message to the UE multiple times, and the auxiliary network selection parameters in the two first indication messages sent twice are different.
  • the core network can more flexibly control the UE to select a PLMN based on different auxiliary network selection parameters. In this way, the success rate of the UE establishing a data connection can be further improved.
  • the core network element after sending the previous first indication message, if at least one of the signal quality and network load of the candidate PLMN meets the predetermined condition, the core network element sends the next first indication message.
  • the latter first indication message is used to instruct the UE to determine whether to select a candidate PLMN according to the auxiliary network selection parameter in the latter first indication message.
  • the core network element first sends the previous first indication message to the UE to instruct the UE to determine whether to select a candidate PLMN based on the auxiliary network selection parameter corresponding to the candidate PLMN in the previous first indication message.
  • At least one of the signal quality and network load of the candidate PLMN changes at a relatively large scale, until the predetermined conditions are met.
  • the core network element sends the next first indication message to the UE to instruct the UE to no longer determine whether to select the candidate PLMN based on the auxiliary network selection parameter corresponding to the candidate PLMN in the previous first indication message, but instead Determine whether to select the candidate PLMN according to the auxiliary network selection parameter corresponding to the candidate PLMN in the subsequent first indication message.
  • the core network element when at least one of the signal quality and network load of the candidate PLMN satisfies the predetermined condition, the core network element sends a first instruction message for update to instruct the UE according to the first instruction message.
  • the auxiliary network selection parameters determine whether to select a candidate PLMN.
  • the core network can flexibly adjust the auxiliary network selection parameters corresponding to the candidate PLMN according to the signal quality or network load of the candidate PLMN, so as to instruct the UE to determine whether to select the candidate PLMN according to the auxiliary network selection parameters corresponding to the candidate PLMN.
  • auxiliary network selection parameters include signal thresholds.
  • the signal threshold in the subsequent first indication message is greater than the signal threshold in the previous first indication message.
  • the signal threshold in the latter first indication message is smaller than the previous one.
  • the first indicates the signal threshold in the message.
  • the first predetermined quality and the second predetermined quality may be the same or different.
  • the first predetermined quality is different from the second predetermined quality, and the second predetermined quality is greater than the first predetermined quality.
  • the first predetermined load and the second predetermined load may be the same or different.
  • the first predetermined load is different from the second predetermined load, and the first predetermined load is greater than the second predetermined load.
  • the greater the signal threshold corresponding to the candidate PLMN the smaller the possibility that the UE will select the candidate PLMN based on the signal threshold corresponding to the candidate PLMN.
  • the smaller the signal threshold corresponding to the candidate PLMN the greater the possibility that the UE will select the candidate PLMN based on the signal threshold corresponding to the candidate PLMN.
  • the core network element increases the signal threshold corresponding to the candidate PLMN; and when the signal quality of the candidate PLMN becomes better or the network load decreases, the core network element increases the signal threshold corresponding to the candidate PLMN. In this case, the core network element reduces the signal threshold corresponding to the candidate PLMN. In this way, the possibility of the UE selecting a candidate PLMN with better signal quality or smaller network load can be improved, thereby improving the possibility of the UE camping in a cell with better signal quality or smaller network load. In this way, it can further improve the UE
  • the success rate of establishing a data connection can also reduce the possibility of network congestion in candidate PLMNs and help achieve load balancing among candidate PLMNs.
  • the value of the signal threshold can be adjusted according to the signal quality of the candidate PLMN or the actual network load.
  • the signal threshold of the received signal quality is not greater than the maximum signal quality of the candidate PLMN; for another example, the signal threshold of the received signal quality is not greater than a certain proportion of the maximum signal quality of the candidate PLMN, for example, 80%, 70%, or 60%.
  • the second indication message for instructing the UE not to select a PLMN according to the auxiliary network selection parameters will be further described below with reference to some embodiments.
  • the core network element when the signal quality of the candidate PLMN is greater than or equal to the third predetermined quality, the core network element sends a second indication message to the UE.
  • the third predetermined quality is greater than the aforementioned first predetermined quality and second predetermined quality.
  • the signal quality of the candidate PLMN is greater than or equal to the third predetermined quality, which indicates that the signal quality of the candidate PLMN is very good.
  • the core network element sends the second indication message to the UE.
  • the core network element sends a second indication message to the UE to instruct the UE not to determine whether to select the candidate PLMN based on the signal threshold corresponding to the candidate PLMN, but to directly select the candidate PLMN.
  • the core network can control the UE to not determine whether to select the candidate PLMN based on the auxiliary network selection parameters when the signal quality of the candidate PLMN is very good, thereby improving the efficiency of the UE in establishing a data connection and ensuring that the UE establishes a data connection. success rate.
  • data-centric (also known as data-only) UEs will select a PLMN based on the auxiliary network selection parameters.
  • voice-centric typically do not select a PLMN based on secondary network selection parameters.
  • present disclosure also proposes the following embodiments.
  • the core network element sends the indication message to the UE only if the UE is a data-centric UE. For example, core network elements will not send indication messages to voice-centric UEs. In this way, the processing pressure of core network elements can be reduced and the possibility of core network element failure can be reduced.
  • Figure 2 is a schematic flowchart of a communication method according to other embodiments of the present disclosure.
  • the communication method also includes steps 202 to 206.
  • step 202 the core network element receives the registration request from the UE.
  • the UE after powering on, the UE sends a registration request. In other embodiments, from the untrusted After the area covered by the signal moves to an area covered by the signal, the UE sends a registration request. In some embodiments, the UE sends a registration request when performing periodic registration updates.
  • step 204 the core network element obtains the user subscription information of the UE.
  • the core network element obtains the user subscription information of the UE from a unified data management (Unified Data Management, UDM) network element.
  • UDM Unified Data Management
  • the core network element determines whether the UE is a data-centric UE based on the user subscription information.
  • step 102 is performed.
  • step 102 is performed. For another example, if it is determined that the UE is a voice-centric UE, step 102 is not performed.
  • the core network element can accurately determine whether the UE is a data-centric UE according to the user subscription information of the UE, so as to ensure that the indication message is sent to the UE only when the UE is a data-centric UE.
  • Figure 3 is a schematic flowchart of a communication method according to further embodiments of the present disclosure.
  • the communication method includes steps 302 to 304.
  • step 302 the UE receives an indication message from a core network element.
  • the UE is a data-centric UE, such as an Internet of Things UE.
  • step 304 the UE determines whether to select a PLMN according to the auxiliary network selection parameters according to the indication message.
  • the UE determines to select the PLMN according to the secondary network selection parameters, and saves the secondary network selection parameters. In this way, the UE can subsequently perform PLMN selection based on the saved auxiliary network selection parameters.
  • the first indication message carries secondary network selection parameters corresponding to the candidate PLMN.
  • the UE determines whether to select the candidate PLMN based on the auxiliary network selection parameter corresponding to the candidate PLMN.
  • the UE may save the auxiliary network selection parameter carried in the first indication message to the user identity card in the UE.
  • the subscriber identification card can be a Universal Subscriber Identity Module (USIM) card, a Subscriber Identity Module (SIM) card, etc.
  • USB Universal Subscriber Identity Module
  • SIM Subscriber Identity Module
  • the UE determines not to select the PLMN according to the secondary network selection parameter.
  • the UE when the indication message is the second indication message and the UE has saved the auxiliary network selection parameter, the UE deletes the auxiliary network selection parameter. For example, if the auxiliary network selection parameter is stored in the subscriber identity card of the UE, the UE deletes the auxiliary network selection parameter from the subscriber identity card. In this way, it can ensure that the UE's subsequent PLMN selection is not based on auxiliary network selection parameters.
  • the second indication message is used to instruct the UE not to determine whether to select the candidate PLMN based on the auxiliary network selection parameter corresponding to the candidate PLMN.
  • the UE deletes the secondary network selection parameter corresponding to the candidate PLMN.
  • the UE determines whether to select a PLMN according to the auxiliary network selection parameters according to the instruction message from the core network element. In this way, the success rate of the UE in establishing the data connection can be improved while also improving the efficiency of the UE in establishing the data connection.
  • Figure 4 is a schematic flowchart of a communication method according to further embodiments of the present disclosure.
  • the communication method also includes step 402.
  • step 402 if it is determined that the PLMN is selected according to the secondary network selection parameter, the UE selects the PLMN according to the priorities of the plurality of candidate PLMNs and the secondary network selection parameter.
  • the priorities of multiple candidate PLMNs can be determined based on a PLMN Selector List (PLMN Selector List).
  • PLMN Selector List may be an operator-defined PLMN selection list or a user-defined PLMN selection list.
  • the PLMN selection list can be saved in the subscriber identity card of the UE.
  • auxiliary network selection parameters include signal thresholds.
  • the UE selects a PLMN based on the priorities of multiple candidate PLMNs and the secondary network selection parameters in the following manner.
  • the UE determines whether to select the first candidate PLMN with the first priority.
  • the UE selects the first candidate PLMN.
  • the UE when the received signal quality of each cell of the first candidate PLMN is less than the signal threshold corresponding to the first candidate PLMN, the UE does not select the first candidate PLMN and uses the second candidate PLMN with the second priority as the first candidate PLMN.
  • the candidate PLMN repeats the above determination, that is, determines whether to select the second candidate PLMN.
  • the level of the second priority is smaller than the level of the first priority, and the second priority and the first priority are two adjacent ones when the priorities of multiple candidate PLMNs are arranged in order from high to low. priority.
  • the UE determines whether to select each candidate PLMN in descending order according to the priority of multiple candidate PLMNs until it selects a candidate PLMN whose received signal quality in at least one cell is greater than or equal to the signal threshold.
  • the UE first determines whether to select PLMN A with the highest priority level. During this process, the UE attempts to search for each cell of PLMN A and access a certain cell of PLMN A. At the same time, the UE measures the received signal quality of each cell of PLMN A to determine whether the received signal quality of each cell is greater than or equal to that of PLMN A. corresponding signal threshold. The UE finds that the received signal quality of each cell of PLMN A is less than the signal threshold corresponding to PLMN A.
  • the UE continues to determine whether to select PLMN B whose priority level is second to PLMN A. During this process, the UE attempts to search for each cell of PLMN B and access a certain cell of PLMN B. At the same time, the UE measures the received signal quality of each cell of PLMN B to determine whether the received signal quality of each cell is greater than or equal to the signal threshold corresponding to PLMN B. The UE finds that the received signal quality of at least one cell of PLMN B is greater than or equal to the signal threshold corresponding to PLMN B.
  • the UE selects PLMN B and camps in a cell of PLMN B to establish a data connection.
  • the UE can select a suitable candidate PLMN according to the priorities of multiple candidate PLMNs and the auxiliary network selection parameters.
  • the communication method shown in Figures 1 and 2 also includes one or more steps in the communication method shown in Figures 3 and 4.
  • the communication method includes step 102 and steps 302 to 304.
  • the communication method includes steps 202 to 206, step 102, and steps 302 to 304.
  • the communication method includes steps 202 to 206, step 102, and steps 302 to 306.
  • Figure 5 is a schematic structural diagram of a core network element according to some embodiments of the present disclosure.
  • the core network element 500 includes a sending module 501.
  • the sending module 501 is configured to send an indication message to the UE to indicate whether the UE selects the PLMN according to the secondary network selection parameter.
  • core network element 500 may also include other various modules to perform operations performed by the core network element in any of the above embodiments.
  • Figure 6 is a schematic structural diagram of a UE according to some embodiments of the present disclosure.
  • UE 600 includes a receiving module 601 and a determining module 602.
  • the receiving module 601 is configured to receive an indication message from a core network element.
  • the determining module 602 is configured to determine, according to the indication message, whether to select the PLMN according to the auxiliary network selection parameter.
  • the UE 600 may also include various other modules to perform operations performed by the UE in any of the above embodiments.
  • FIG. 7 is a schematic structural diagram of an electronic device according to some embodiments of the present disclosure.
  • the electronic device 700 includes a memory 701 and a processor 702 coupled to the memory 701 .
  • the processor 702 is configured to execute the communication method of any of the above embodiments based on instructions stored in the memory 701 .
  • Memory 701 may include, for example, system memory, fixed non-volatile storage media, and the like.
  • System memory may store, for example, operating systems, application programs, boot loaders, and other programs.
  • the electronic device 700 may also include an input-output interface 703, a network interface 704, a storage interface 705, and the like. These interfaces 703, 704, and 705, and the memory 701 and the processor 702 may be connected through a bus 706, for example.
  • the input and output interface 703 provides a connection interface for input and output devices such as a monitor, mouse, keyboard, and touch screen.
  • Network interface 704 provides a connection interface for various networked devices.
  • the storage interface 705 provides a connection interface for external storage devices such as SD cards and USB disks.
  • the electronic device 700 may be a core network element or a UE in any of the above embodiments.
  • the electronic device 700 when configured to perform the communication methods of FIG. 1, FIG. 2 and related embodiments, the electronic device 700 is a core network element.
  • the electronic device 700 when configured to perform the communication methods of FIG. 3, FIG. 4 and related embodiments, the electronic device 700 is a UE.
  • An embodiment of the present disclosure also provides a communication device, including a module configured to perform the communication method of any one of the above embodiments.
  • the communication device may be a core network element.
  • the communication device may be a UE.
  • An embodiment of the present disclosure also provides a communication system, including the core network element (for example, core network element 500) of any of the above embodiments and the UE (for example, UE 600) of any of the above embodiments.
  • the core network element for example, core network element 500
  • the UE for example, UE 600
  • Embodiments of the present disclosure also provide a computer-readable storage medium, which includes computer program instructions.
  • the computer program instructions are executed by a processor, the communication method of any of the above embodiments is implemented.
  • An embodiment of the present disclosure also provides a computer program product, including a computer program, which implements the communication method of any of the above embodiments when executed by a processor.
  • embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk memory, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. .
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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Abstract

本公开提供了一种通信方法、系统、核心网网元和用户设备,涉及通信技术领域,所述方法包括:核心网网元向UE发送指示消息,以指示所述UE是否根据辅助网络选择参数选择PLMN。

Description

通信方法、系统、核心网网元和用户设备
相关申请的交叉引用
本申请是以CN申请号为202210991884.6,申请日为2022年8月17日的申请为基础,并主张其优先权,该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及通信技术领域,尤其是一种通信方法、系统、核心网网元和用户设备(User Equipment,UE)。
背景技术
相关技术中,UE根据UE的用户识别卡中的预置信息从多个公共陆地移动网络(Public Land Mobile Network,PLMN)中选择一个PLMN,并进一步驻留在该PLMN的某一小区,以建立数据连接。
发明内容
根据本公开实施例的一方面,提供一种通信方法,包括:核心网网元向用户设备UE发送指示消息,以指示所述UE是否根据辅助网络选择参数选择公共陆地移动网络PLMN。
在一些实施例中,所述指示消息包括第一指示消息,所述第一指示消息用于指示所述UE根据所述第一指示消息中的所述辅助网络选择参数选择PLMN。
在一些实施例中,核心网网元向UE发送指示消息包括:所述核心网网元多次向所述UE发送所述第一指示消息,其中,对于相邻两次发送的两条第一指示消息,前一条第一指示消息中的所述辅助网络选择参数不同于后一条第一指示消息中的所述辅助网络选择参数。
在一些实施例中,所述核心网网元多次向所述UE发送所述第一指示消息包括:在发送所述前一条第一指示消息后,在候选PLMN的信号质量和网络负载中的至少一项满足预定条件的情况下,所述核心网网元发送所述后一条第一指示消息,所述后一条第一指示消息用于指示所述UE根据所述后一条第一指示消息中的所述辅助网络选择参数判断是否选择所述候选PLMN。
在一些实施例中,所述辅助网络选择参数包括信号门限;在候选PLMN的信号质量小于或等于第一预定质量的情况下,或者在候选PLMN的网络负载大于或等于第一预定负载的情况下,所述后一条第一指示消息中的信号门限大于所述前一条第一指示消息中的信号门限;在候选PLMN的信号质量大于或等于第二预定质量的情况下,或者在候选PLMN的网络负载小于或等于第二预定负载的情况下,所述后一条第一指示消息中的信号门限小于所述前一条第一指示消息中的信号门限。
在一些实施例中,所述指示消息包括第二指示消息,所述第二指示消息用于指示所述UE不根据所述辅助网络选择参数选择PLMN。
在一些实施例中,核心网网元向UE发送指示消息包括:在候选PLMN的信号质量大于或等于第三预定质量的情况下,所述核心网网元向所述UE发送所述第二指示消息。
在一些实施例中,仅在所述UE是以数据为中心的UE的情况下,所述核心网网元向所述UE发送所述指示消息。
在一些实施例中,所述方法还包括:所述核心网网元接收来自所述UE的注册请求;所述核心网网元获取所述UE的用户签约信息;和所述核心网网元根据所述用户签约信息,确定所述UE是否是以数据为中心的UE。
根据本公开实施例的另一方面,提供一种通信方法,包括:UE接收来自核心网网元的指示消息;和所述UE根据所述指示消息,确定是否根据辅助网络选择参数选择PLMN。
在一些实施例中,所述UE根据所述指示消息,确定是否根据辅助网络选择参数选择PLMN包括:在所述指示消息是携带所述辅助网络选择参数的第一指示消息的情况下,所述UE确定根据所述辅助网络选择参数选择PLMN,并保存所述辅助网络选择参数。
在一些实施例中,所述UE将所述辅助网络选择参数保存至所述UE中的用户识别卡。
在一些实施例中,所述UE根据所述指示消息,确定是否根据辅助网络选择参数选择PLMN包括:在所述指示消息是第二指示消息的情况下,所述UE确定不根据所述辅助网络选择参数选择PLMN。
在一些实施例中,在所述指示消息是所述第二指示消息、且所述UE已保存所述辅助网络选择参数的情况下,所述UE删除所述辅助网络选择参数。
在一些实施例中,所述方法还包括:在确定根据所述辅助网络选择参数选择PLMN的情况下,所述UE根据多个候选PLMN的优先级和所述辅助网络选择参数选择PLMN。
在一些实施例中,所述辅助网络选择参数包括信号门限;所述UE根据多个候选PLMN的优先级和所述辅助网络选择参数选择PLMN包括:所述UE判断是否选择第一优先级的第一候选PLMN;在所述第一候选PLMN的至少一个小区的接收信号质量大于或等于所述信号门限的情况下,所述UE选择所述第一候选PLMN;在所述第一候选PLMN的各个小区的接收信号质量均小于所述信号门限的情况下,所述UE不选择所述第一候选PLMN,并将第二优先级的第二候选PLMN作为所述第一候选PLMN重复所述判断,其中,所述第二优先级的级别小于所述第一优先级的级别,且所述第二优先级和所述第一优先级是所述多个候选PLMN的优先级按照从高到低的顺序排列的情况下的相邻的两个优先级。
在一些实施例中,所述UE为以数据为中心的UE。
在一些实施例中,所述核心网网元为移动性管理功能网元。
在一些实施例中,所述指示消息为非接入层消息。
在一些实施例中,所述辅助网络选择参数包括信号门限。
在一些实施例中,所述信号门限包括信号强度门限。
根据本公开实施例的还一方面,提供一种通信方法,包括:向用户设备UE发送指示消息,以指示所述UE是否根据辅助网络选择参数选择公共陆地移动网络PLMN。
根据本公开实施例的还一方面,提供一种核心网网元,包括:发送模块,被配置为向UE发送指示消息,以指示所述UE是否根据辅助网络选择参数选择PLMN。
根据本公开实施例的还一方面,提供一种核心网网元,包括:存储器;以及耦接至所述存储器的处理器,被配置为基于存储在所述存储器中的指令,执行上述任意一个实施例所述的方法。
根据本公开实施例的还一方面,提供一种用户设备,包括:接收模块,被配置为接收来自核心网网元的指示消息;和确定模块,被配置为根据所述指示消息,确定是否根据辅助网络选择参数选择PLMN。
根据本公开实施例的还一方面,提供一种用户设备,包括:存储器;以及耦接至所述存储器的处理器,被配置为基于存储在所述存储器中的指令,执行上述任意一个实施例所述的方法。
根据本公开实施例的还一方面,提供一种通信系统,包括:上述任意一个实施例所述的核心网网元;和上述任意一个实施例所述的用户设备。
根据本公开实施例的还一方面,提供一种计算机可读存储介质,包括计算机程序指令,其中,所述计算机程序指令被处理器执行时实现上述任意一个实施例所述的方法。
根据本公开实施例的还一方面,提供一种计算机程序产品,包括计算机程序,其中,所述计算机程序被处理器执行时实现上述任意一个实施例所述的方法。
本公开实施例中,核心网网元向UE发送指示消息,以指示UE是否根据辅助网络选择参数选择PLMN。这种方式下,核心网可以根据实际需要灵活控制UE是否根据辅助网络选择参数选择PLMN。如此,可以在提高UE建立数据连接的成功率的同时,提高UE建立数据连接的效率。
下面通过附图和实施例,对本公开的技术方案做进一步的详细描述。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本公开的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是根据本公开一些实施例的通信方法的流程示意图;
图2是根据本公开另一些实施例的通信方法的流程示意图;
图3是根据本公开又一些实施例的通信方法的流程示意图;
图4是根据本公开又一些实施例的通信方法的流程示意图;
图5是根据本公开一些实施例的核心网网元的结构示意图;
图6是根据本公开一些实施例的UE的结构示意图;
图7是根据本公开一些实施例的电子装置的结构示意图。
具体实施方式
下面将结合本公开实施例中的附图,对本公开实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本公开一部分实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有作出创造性劳动的前提下所获得 的所有其他实施例,都属于本公开保护的范围。
除非另外具体说明,否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本公开的范围。
同时,应当明白,为了便于描述,附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论,但在适当情况下,所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有示例中,任何具体值应被解释为仅仅是示例性的,而不是作为限制。因此,示例性实施例的其它示例可以具有不同的值。
应注意到:相似的标号和字母在下面的附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步讨论。
发明人注意到,UE根据预置信息中除多个PLMN的优先级外的辅助网络选择参数选择PLMN,以提高UE驻留在信号质量较好的小区的可能性,提高UE建立数据连接的成功率。
然而,在某些情况下,当根据辅助网络选择参数选择PLMN时,会导致UE建立数据连接的效率降低。例如,对于信号质量好的PLMN,即便不根据辅助网络选择参数而是直接选择该PLMN,UE仍然能够驻留在信号质量较好的小区、成功建立数据连接。
相关技术中,无论PLMN的信号质量如何,UE总是根据辅助网络选择参数选择PLMN,从而降低了UE建立数据连接的效率。
为了解决上述问题,本公开实施例提出了如下解决方案。
本公开实施例提供一种通信方法。通信方法包括:向UE发送指示消息,以指示UE是否根据辅助网络选择参数选择公共陆地移动网络PLMN。
通信方法可以包括但不限于由核心网网元执行。下面结合图1对核心网网元执行通信方法的实施例进行说明。
图1是根据本公开一些实施例的通信方法的流程示意图。
如图1所示,通信方法包括步骤102。
在步骤102,核心网网元向UE发送指示消息,以指示UE是否根据辅助网络选择参数选择PLMN。
辅助网络参数可以包括各个候选PLMN对应的辅助网络参数。这种情况下,指示 UE是否根据辅助网络选择参数选择PLMN,即,指示UE是否根据候选PLMN对应的辅助网络参数判断是否选择该候选PLMN。
应理解,不同候选PLMN对应的辅助网络参数可以相同或不同。
在一些实施例中,辅助网络选择参数包括信号门限,例如,接收信号质量的信号门限。接收信号质量的信号门限大于小区选择准则(Cell Selection Criterion,也称为S准则)。
在一些实施例中,信号门限包括信号强度门限。例如,辅助网络参数可以包括各个候选PLMN对应的接收信号强度的信号强度门限。
在一些实施例中,指示消息包括第一指示消息,第一指示消息用于指示UE根据辅助网络选择参数选择PLMN。
例如,对于信号质量较差的候选PLMN,期望的是UE根据候选PLMN对应的信号门限判断是否选择该候选PLMN。这种情况下,核心网网元向UE发送第一指示消息,以指示UE根据候选PLMN对应的信号门限判断是否选择该候选PLMN,从而提高UE建立数据连接的成功率。
在另一些实施例中,指示消息包括第二指示消息,第二指示消息用于指示UE不根据辅助网络选择参数选择PLMN。
例如,对于信号质量较好的PLMN,期望的是UE无需根据候选PLMN对应的信号门限判断是否选择该候选PLMN,而是直接选择该PLMN。这种情况下,核心网网元向UE发送第二指示消息,以指示UE不根据候选PLMN对应的信号门限判断是否选择该候选PLMN,从而提高UE建立数据连接的效率。
在一些实施例中,指示消息是非接入层(Non Access Stratum,NAS)消息。例如,第一指示消息为NAS消息;又例如,第二指示消息为NAS消息。
在一些实施例中,核心网网元是移动性管理功能网元。例如,移动性管理功能网元可以是4G核心网中的移动性管理实体(Mobility Management Entity,MME)或5G核心网中的接入和移动性管理功能(Access and Mobility Management Function,AMF)网元。
应理解,移动性管理功能网元还可以是其它核心网(例如,6G核心网等)中具备类似功能的其它网元。
上述实施例中,核心网网元向UE发送指示消息,以指示UE是否根据辅助网络选择参数选择PLMN。这种方式下,核心网可以根据实际需要灵活控制UE是否根据 辅助网络选择参数选择PLMN。如此,可以在提高UE建立数据连接的成功率的同时,提高UE建立数据连接的效率。
发明人还注意到,相关技术中,辅助网络选择参数在制卡时被烧制在用户识别卡中,或者,由空中下载技术(Over-the-Air Technology,OTA)平台通过用户面发送至用户识别卡中。
这些方式下,UE只能根据固定的辅助网络选择参数选择PLMN,导致UE建立数据连接的成功率得不到有效提高。有鉴于此,本公开还提出如下实施例。
在一些实施例中,指示消息包括第一指示消息,第一指示消息用于指示UE根据第一指示消息中的辅助网络选择参数选择PLMN。
以辅助网络选择参数包括信号门限为例来说,第一指示消息携带辅助网络选择参数,即第一指示消息携带信号门限的值。
例如,由于候选PLMN的信号质量不断变化,期望的是UE可以根据不同值的信号门限判断是否选择该候选PLMN。这种情况下,核心网可以根据候选PLMN当前的信号质量等实际情况调整该候选PLMN对应的信号门限的值。
然后,核心网网元可以向UE发送第一指示消息,以指示UE根据候选PLMN对应的信号门限判断是否选择该候选PLMN,从而可以提高UE建立数据连接的成功率。
上述实施例中,核心网网元向UE发送第一指示消息,以指示UE根据第一指示消息中的辅助网络选择参数选择PLMN。这种方式下,核心网可以通过控制面向UE发送辅助网络选择参数,以便灵活控制UE根据不同的辅助网络选择参数选择PLMN。如此,可以进一步提高UE建立数据连接的成功率。
在一些实施例中,第一指示消息用于指示UE设置辅助网络选择参数。
例如,在接收第一指示消息之前,UE没有保存辅助网络选择参数,即,UE不根据辅助网络选择参数选择PLMN。之后,核心网网元向UE发送第一指示消息,以指示UE保存第一指示消息中的辅助网络选择参数。在保存辅助网络选择参数后,UE可以根据保存的辅助网络选择参数选择PLMN。如此,可以实现辅助网络选择参数的设置。
在另一些实施例中,第一指示消息用于指示UE更新辅助网络选择参数。
例如,在接收第一指示消息之前,UE已保存辅助网络选择参数,即,UE已经能够根据保存的辅助网络选择参数选择PLMN。之后,核心网网元向UE发送第一指示消息,以指示UE将保存的辅助网络选择参数更新为第一指示消息中的辅助网络选择 参数。这种情况下,UE不再根据之前保存的辅助网络选择参数选择PLMN,而是根据第一指示消息中的辅助网络选择参数选择PLMN。如此,可以实现辅助网络选择参数的更新。
作为一些实现方式,UE在接收用于更新的第一指示消息之前保存的辅助网络选择参数是在制卡时烧制在用户识别卡中的,或是由OTA平台通过用户面发送至用户识别卡中的。
作为另一些实现方式,UE在接收用于更新的第一指示消息之前保存的辅助网络选择参数是核心网网元通过另一第一指示消息发送给UE的。下面结合一些实施例对这些实现方式进行说明。
在一些实施例中,在步骤102中,核心网网元多次向UE发送携带辅助网络选择参数的第一指示消息。
这里,对于相邻两次发送的两条第一指示消息,前一条第一指示消息中的辅助网络选择参数不同于后一条第一指示消息中的辅助网络选择参数。可以理解,前一条第一指示消息即相邻两次发送的第一指示消息中前一次发送的第一指示消息,后一条第一指示消息即相邻两次发送的第一指示消息中后一次发送的第一指示消息。
即,后一条第一指示消息用于指示UE更新辅助网络选择参数。在一些实施例中,前一条第一指示消息用于指示UE设置辅助网络选择参数。在另一些实施例中,前一条第一指示消息也用于指示UE更新辅助网络选择参数。
上述实施例中,核心网网元多次向UE发送第一指示消息,并且,相邻两次发送的两条第一指示消息中的辅助网络选择参数不同。这种方式下,核心网可以更灵活地控制UE根据不同的辅助网络选择参数选择PLMN。如此,可以进一步提高UE建立数据连接的成功率。
在一些实施例中,在发送前一条第一指示消息后,在候选PLMN的信号质量和网络负载中的至少一项满足预定条件的情况下,核心网网元发送后一条第一指示消息。
这里,后一条第一指示消息用于指示UE根据后一条第一指示消息中的辅助网络选择参数判断是否选择候选PLMN。
例如,核心网网元首先向UE发送前一条第一指示消息,以指示UE根据前一条第一指示消息中某一候选PLMN对应的辅助网络选择参数判断是否选择该候选PLMN。
之后,该候选PLMN的信号质量和网络负载中的至少一项以较大幅度发生变化, 直至满足预定条件。
这种情况下,核心网网元向UE发送后一条第一指示消息,以指示UE不再根据前一条第一指示消息中该候选PLMN对应的辅助网络选择参数判断是否选择该候选PLMN,而是根据后一条第一指示消息中该候选PLMN对应的辅助网络选择参数判断是否选择该候选PLMN。
上述实施例中,在候选PLMN的信号质量和网络负载中的至少一项满足预定条件的情况下,核心网网元发送用于更新的第一指示消息,以指示UE根据该第一指示消息中的辅助网络选择参数判断是否选择候选PLMN。如此,核心网可以根据候选PLMN的信号质量或网络负载灵活地调整候选PLMN对应的辅助网络选择参数,以指示UE根据候选PLMN对应的辅助网络选择参数判断是否选择候选PLMN。
在一些实施例中,辅助网络选择参数包括信号门限。
作为一些实现方式,在候选PLMN的信号质量小于或等于第一预定质量的情况下,或者在候选PLMN的网络负载(例如,与驻留在该候选PLMN的各个小区的UE的总数量正相关)大于或等于第一预定负载的情况下,后一条第一指示消息中的信号门限大于前一条第一指示消息中的信号门限。
反之,在候选PLMN的信号质量大于或等于第二预定质量的情况下,或者在候选PLMN的网络负载小于或等于第二预定负载的情况下,后一条第一指示消息中的信号门限小于前一条第一指示消息中的信号门限。
第一预定质量与第二预定质量可以相同或不同。例如,第一预定质量与第二预定质量不同,第二预定质量大于第一预定质量。
第一预定负载与第二预定负载也可以相同或不同。例如,第一预定负载与第二预定负载不同,第一预定负载大于第二预定负载。
应理解,候选PLMN对应的信号门限越大,UE根据候选PLMN对应的信号门限判断选择该候选PLMN的可能性越小。反之,候选PLMN对应的信号门限越小,UE根据候选PLMN对应的信号门限判断选择该候选PLMN的可能性越大。
上述实现方式下,在候选PLMN的信号质量变差或网络负载增大的情况下,核心网网元增大候选PLMN对应的信号门限;而在候选PLMN的信号质量变好或网络负载减小的情况下,核心网网元减小候选PLMN对应的信号门限。这种方式下,可以提高UE选择信号质量较好或网络负载较小的候选PLMN的可能性,从而可以提高UE驻留在信号质量较好或网络负载较小的小区的可能性。如此,既可以进一步提高UE 建立数据连接的成功率,又可以降低候选PLMN发生网络拥塞的可能性,有利于实现各候选PLMN之间的负载均衡。
应理解,信号门限的值可以根据候选PLMN的信号质量或网络负载的实际情况进行调整。例如,接收信号质量的信号门限不大于候选PLMN的最大信号质量;又例如,接收信号质量的信号门限不大于候选PLMN的最大信号质量的一定比例,例如,80%、70%、60%。
下面结合一些实施例进一步说明用于指示UE不根据辅助网络选择参数选择PLMN的第二指示消息。
在一些实施例中,在候选PLMN的信号质量大于或等于第三预定质量的情况下,核心网网元向UE发送第二指示消息。第三预定质量大于前述第一预定质量和第二预定质量。
候选PLMN的信号质量大于或等于第三预定质量,这表示候选PLMN的信号质量很好。这种情况下,期望的是UE不根据候选PLMN对应的辅助网络选择参数判断是否选择该候选PLMN。故,核心网网元向UE发送第二指示消息。
例如,核心网网元向UE发送第二指示消息,以指示UE不根据候选PLMN对应的信号门限判断是否选择该候选PLMN,而是可以直接选择该候选PLMN。
如此,核心网可以控制UE在候选PLMN的信号质量很好的情况下,不根据辅助网络选择参数判断是否选择该候选PLMN,从而可以在提高UE建立数据连接的效率的同时,保证UE建立数据连接的成功率。
发明人还注意到,由于具备不移动性,以数据为中心(data-centric,也称为只有数据,即,data-only)的UE,特别是物联网UE会根据辅助网络选择参数选择PLMN。反之,诸如以语音为中心(voice-centric)的其它UE通常不会根据辅助网络选择参数选择PLMN。有鉴于此,本公开还提出如下实施例。
在一些实施例中,仅在UE是以数据为中心的UE的情况下,核心网网元向UE发送指示消息。例如,核心网网元不会向以语音为中心的UE发送指示消息。如此,可以降低核心网网元的处理压力,降低核心网网元故障的可能性。
图2是根据本公开另一些实施例的通信方法的流程示意图。
如图2所示,通信方法还包括步骤202~步骤206。
在步骤202,核心网网元接收来自UE的注册请求。
在一些实施例中,在开机后,UE发送注册请求。在另一些实施例中,在从无信 号覆盖的区域移动到有信号覆盖的区域后,UE发送注册请求。在又一些实施例中,在周期性地进行注册更新时,UE发送注册请求。
在步骤204,核心网网元获取UE的用户签约信息。
在一些实施例中,核心网网元从统一数据管理(Unified Data Management,UDM)网元获取UE的用户签约信息。
在步骤206,核心网网元根据用户签约信息,确定UE是否是以数据为中心的UE。
如果确定UE是以数据为中心的UE,则执行步骤102。
例如,如果确定UE是物联网UE,则执行步骤102。又例如,如果确定UE是以语音为中心的UE,则不执行步骤102。
如此,核心网网元可以根据UE的用户签约信息准确地确定UE否是以数据为中心的UE,以确保仅在UE是以数据为中心的UE的情况下,向UE发送指示消息。
图3是根据本公开又一些实施例的通信方法的流程示意图。
如图3所示,通信方法包括步骤302~步骤304。
在步骤302,UE接收来自核心网网元的指示消息。
在一些实施例中,UE是为以数据为中心的UE,例如,物联网UE。
在步骤304,UE根据指示消息,确定是否根据辅助网络选择参数选择PLMN。
在一些实施例中,在指示消息是携带辅助网络选择参数的第一指示消息的情况下,UE确定根据辅助网络选择参数选择PLMN,并保存辅助网络选择参数。如此,UE后续可以根据保存的辅助网络选择参数进行PLMN选择。
例如,第一指示消息携带候选PLMN对应的辅助网络选择参数。这种情况下,UE根据候选PLMN对应的辅助网络选择参数判断是否选择该候选PLMN。
作为一些实现方式,UE可以将第一指示消息中携带的辅助网络选择参数保存至UE中的用户识别卡。
例如,用户识别卡可以是全球用户身份模块(Universal Subscriber Identity Module,USIM)卡、用户身份模块(Subscriber Identity Module,SIM)卡等。
在另一些实施例中,在指示消息是第二指示消息的情况下,UE确定不根据辅助网络选择参数选择PLMN。
作为一些实现方式,在指示消息是第二指示消息、且UE已保存辅助网络选择参数的情况下,UE删除辅助网络选择参数。例如,辅助网络选择参数保存在UE的用户识别卡中,则UE从用户识别卡中删除辅助网络选择参数。如此,可以确保UE后续 不根据辅助网络选择参数进行PLMN选择。
例如,第二指示消息用于指示UE不根据候选PLMN对应的辅助网络选择参数判断是否选择该候选PLMN。这种情况下,UE删除该候选PLMN对应的辅助网络选择参数。
上述实施例中,UE根据来自核心网网元的指示消息,确定是否根据辅助网络选择参数选择PLMN。如此,可以在提高UE建立数据连接的成功率的同时,提高UE建立数据连接的效率。
图4是根据本公开又一些实施例的通信方法的流程示意图。
如图4所示,通信方法还包括步骤402。
在步骤402,在确定根据辅助网络选择参数选择PLMN的情况下,UE根据多个候选PLMN的优先级和辅助网络选择参数选择PLMN。
例如,多个候选PLMN的优先级可以基于PLMN选择列表(PLMN Selector List)确定。PLMN选择列表可以是运营商定义的PLMN选择列表或用户定义的PLMN选择列表。PLMN选择列表可以保存在UE的用户识别卡中。
在一些实施例中,辅助网络选择参数包括信号门限。这种情况下,UE按照以下方式根据多个候选PLMN的优先级和辅助网络选择参数选择PLMN。
首先,UE判断是否选择第一优先级的第一候选PLMN。
在第一候选PLMN的至少一个小区的接收信号质量大于或等于第一候选PLMN对应的信号门限的情况下,UE选择第一候选PLMN。
反之,在第一候选PLMN的各个小区的接收信号质量均小于第一候选PLMN对应的信号门限的情况下,UE不选择第一候选PLMN,并将第二优先级的第二候选PLMN作为第一候选PLMN重复上述判断,即,判断是否选择第二候选PLMN。
这里,第二优先级的级别小于第一优先级的级别,且第二优先级和第一优先级是多个候选PLMN的优先级按照从高到低的顺序排列的情况下的相邻的两个优先级。
即,这些实施例中,UE按照多个候选PLMN的优先级从高到低的顺序依次判断是否选择每个候选PLMN,直至选择至少一个小区的接收信号质量大于或等于信号门限的某个候选PLMN。
例如,UE首先判断是否选择优先级的级别最高的PLMN A。在这一过程中,UE尝试搜索PLMN A的各小区,并接入PLMN A的某一小区。同时,UE测量PLMN A的各小区的接收信号质量,以确定各小区的接收信号质量是否大于或等于PLMN A对 应的信号门限。UE发现PLMN A的各小区的接收信号质量均小于PLMN A对应的信号门限。
这种情况下,UE继续判断是否选择优先级的级别仅次于PLMN A的PLMN B。在这一过程中,UE尝试搜索PLMN B的各小区,并接入PLMN B的某一小区。同时,UE测量PLMN B的各小区的接收信号质量,以确定各小区的接收信号质量是否大于或等于PLMN B对应的信号门限。UE发现PLMN B的至少一个小区的接收信号质量大于或等于PLMN B对应的信号门限。
这种情况下,UE选择PLMN B,并驻留在PLMN B的某一小区,以建立数据连接。
如此,UE可以根据多个候选PLMN的优先级和辅助网络选择参数选择合适的候选PLMN。
关于图3和图4所示通信方法的其它实施例可以参见图1和图2所示通信方法的相关实施例,这里不再赘述。
在一些实施例中,图1、图2所示的通信方法也包括图3、图4所示的通信方法中的一个或多个步骤。例如,通信方法包括步骤102以及步骤302~步骤304。又例如,通信方法包括步骤202~206、步骤102以及步骤302~步骤304。再例如,通信方法包括步骤202~206、步骤102以及步骤302~步骤306。
图5是根据本公开一些实施例的核心网网元的结构示意图。
如图5所示,核心网网元500包括发送模块501。
发送模块501被配置为向UE发送指示消息,以指示UE是否根据辅助网络选择参数选择PLMN。
应理解,核心网网元500还可以包括其它各种模块,以执行上述任意一个实施例的核心网网元执行的操作。
图6是根据本公开一些实施例的UE的结构示意图。
如图6所示,UE 600包括接收模块601和确定模块602。
接收模块601被配置为接收来自核心网网元的指示消息。
确定模块602被配置为根据指示消息,确定是否根据辅助网络选择参数选择PLMN。
应理解,UE 600还可以包括其它各种模块,以执行上述任意一个实施例的UE执行的操作。
图7是根据本公开一些实施例的电子装置的结构示意图。
如图7所示,电子装置700包括存储器701以及耦接至该存储器701的处理器702,处理器702被配置为基于存储在存储器701中的指令,执行上述任意一个实施例的通信方法。
存储器701例如可以包括系统存储器、固定非易失性存储介质等。系统存储器例如可以存储有操作系统、应用程序、引导装载程序(Boot Loader)以及其他程序等。
电子装置700还可以包括输入输出接口703、网络接口704、存储接口705等。这些接口703、704、705之间、以及存储器701与处理器702之间例如可以通过总线706连接。输入输出接口703为显示器、鼠标、键盘、触摸屏等输入输出设备提供连接接口。网络接口704为各种联网设备提供连接接口。存储接口705为SD卡、U盘等外置存储设备提供连接接口。
应理解,电子装置700可以是上述任意一个实施例的核心网网元或UE。例如,在被配置为执行图1、图2及相关实施例的通信方法时,电子装置700是核心网网元。又例如,在被配置为执行图3、图4及相关实施例的通信方法时,电子装置700是UE。
本公开实施例还提供一种通信装置,包括被配置为执行上述任意一个实施例的通信方法的模块。在一些实施例中,通信装置可以是核心网网元。在另一些实施例中,通信装置可以是UE。
本公开实施例还提供一种通信系统,包括上述任意一个实施例的核心网网元(例如,核心网网元500)和上述任意一个实施例的UE(例如,UE 600)。
本公开实施例还提供了一种计算机可读存储介质,包括计算机程序指令,该计算机程序指令被处理器执行时实现上述任意一个实施例的通信方法。
本公开实施例还提供了一种计算机程序产品,包括计算机程序,该计算机程序被处理器执行时实现上述任意一个实施例的通信方法。
至此,已经详细描述了本公开的各实施例。为了避免遮蔽本公开的构思,没有描述本领域所公知的一些细节。本领域技术人员根据上面的描述,完全可以明白如何实施这里公开的技术方案。
本说明书中各个实施例均采用递进的方式描述,每个实施例重点说明的都是与其它实施例的不同之处,各个实施例之间相同或相似的部分相互参见即可。对于装置、系统实施例而言,由于其与方法实施例基本对应,所以描述的比较简单,相关之处参见方法实施例的部分说明即可。
本领域内的技术人员应当明白,本公开的实施例可提供为方法、系统、或计算机程序产品。因此,本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用非瞬时性存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解,可由计算机程序指令实现流程图中一个流程或多个流程和/或方框图中一个方框或多个方框中指定的功能。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
虽然已经通过示例对本公开的一些特定实施例进行了详细说明,但是本领域的技术人员应该理解,以上示例仅是为了进行说明,而不是为了限制本公开的范围。本领域的技术人员应该理解,可在不脱离本公开的范围和精神的情况下,对以上实施例进行修改或者对部分技术特征进行等同替换。本公开的范围由所附权利要求来限定。

Claims (29)

  1. 一种通信方法,包括:
    核心网网元向用户设备UE发送指示消息,以指示所述UE是否根据辅助网络选择参数选择公共陆地移动网络PLMN。
  2. 根据权利要求1所述的方法,其中,所述指示消息包括第一指示消息,所述第一指示消息用于指示所述UE根据所述第一指示消息中的所述辅助网络选择参数选择PLMN。
  3. 根据权利要求2所述的方法,其中,核心网网元向UE发送指示消息包括:
    所述核心网网元多次向所述UE发送所述第一指示消息,其中,对于相邻两次发送的两条第一指示消息,前一条第一指示消息中的所述辅助网络选择参数不同于后一条第一指示消息中的所述辅助网络选择参数。
  4. 根据权利要求3所述的方法,其中,所述核心网网元多次向所述UE发送所述第一指示消息包括:
    在发送所述前一条第一指示消息后,在候选PLMN的信号质量和网络负载中的至少一项满足预定条件的情况下,所述核心网网元发送所述后一条第一指示消息,所述后一条第一指示消息用于指示所述UE根据所述后一条第一指示消息中的所述辅助网络选择参数判断是否选择所述候选PLMN。
  5. 根据权利要求4所述的方法,其中,所述辅助网络选择参数包括信号门限;
    在候选PLMN的信号质量小于或等于第一预定质量的情况下,或者在候选PLMN的网络负载大于或等于第一预定负载的情况下,所述后一条第一指示消息中的信号门限大于所述前一条第一指示消息中的信号门限;
    在候选PLMN的信号质量大于或等于第二预定质量的情况下,或者在候选PLMN的网络负载小于或等于第二预定负载的情况下,所述后一条第一指示消息中的信号门限小于所述前一条第一指示消息中的信号门限。
  6. 根据权利要求1-5任意一项所述的方法,其中,所述指示消息包括第二指示消息,所述第二指示消息用于指示所述UE不根据所述辅助网络选择参数选择PLMN。
  7. 根据权利要求6所述的方法,其中,核心网网元向UE发送指示消息包括:
    在候选PLMN的信号质量大于或等于第三预定质量的情况下,所述核心网网元向所述UE发送所述第二指示消息。
  8. 根据权利要求1-7任意一项所述的方法,其中,
    仅在所述UE是以数据为中心的UE的情况下,所述核心网网元向所述UE发送所述指示消息。
  9. 根据权利要求8所述的方法,还包括:
    所述核心网网元接收来自所述UE的注册请求;
    所述核心网网元获取所述UE的用户签约信息;和
    所述核心网网元根据所述用户签约信息,确定所述UE是否是以数据为中心的UE。
  10. 一种通信方法,包括:
    UE接收来自核心网网元的指示消息;和
    所述UE根据所述指示消息,确定是否根据辅助网络选择参数选择PLMN。
  11. 根据权利要求10所述的通信方法,其中,所述UE根据所述指示消息,确定是否根据辅助网络选择参数选择PLMN包括:
    在所述指示消息是携带所述辅助网络选择参数的第一指示消息的情况下,所述UE确定根据所述辅助网络选择参数选择PLMN,并保存所述辅助网络选择参数。
  12. 根据权利要求11所述的方法,其中,所述UE将所述辅助网络选择参数保存至所述UE中的用户识别卡。
  13. 根据权利要求10-12任意一项所述的方法,其中,所述UE根据所述指示消息,确定是否根据辅助网络选择参数选择PLMN包括:
    在所述指示消息是第二指示消息的情况下,所述UE确定不根据所述辅助网络选择参数选择PLMN。
  14. 根据权利要求13所述的方法,其中,
    在所述指示消息是所述第二指示消息、且所述UE已保存所述辅助网络选择参数的情况下,所述UE删除所述辅助网络选择参数。
  15. 根据权利要求10-14任意一项所述的方法,还包括:
    在确定根据所述辅助网络选择参数选择PLMN的情况下,所述UE根据多个候选PLMN的优先级和所述辅助网络选择参数选择PLMN。
  16. 根据权利要求15所述的方法,其中,所述辅助网络选择参数包括信号门限;
    所述UE根据多个候选PLMN的优先级和所述辅助网络选择参数选择PLMN包括:
    所述UE判断是否选择第一优先级的第一候选PLMN;
    在所述第一候选PLMN的至少一个小区的接收信号质量大于或等于所述信号门限的情况下,所述UE选择所述第一候选PLMN;
    在所述第一候选PLMN的各个小区的接收信号质量均小于所述信号门限的情况下,所述UE不选择所述第一候选PLMN,并将第二优先级的第二候选PLMN作为所述第一候选PLMN重复所述判断,
    其中,所述第二优先级的级别小于所述第一优先级的级别,且所述第二优先级和所述第一优先级是所述多个候选PLMN的优先级按照从高到低的顺序排列的情况下的相邻的两个优先级。
  17. 根据权利要求10-16任意一项所述的方法,其中,所述UE为以数据为中心的UE。
  18. 根据权利要求1-17任意一项所述的方法,其中,所述核心网网元为移动性管理功能网元。
  19. 根据权利要求1-17任意一项所述的方法,其中,所述指示消息为非接入层消息。
  20. 根据权利要求1-17任意一项所述的方法,其中,所述辅助网络选择参数包括信号门限。
  21. 根据权利要求20所述的方法,其中,所述信号门限包括信号强度门限。
  22. 一种通信方法,包括:
    向用户设备UE发送指示消息,以指示所述UE是否根据辅助网络选择参数选择公共陆地移动网络PLMN。
  23. 一种核心网网元,包括:
    发送模块,被配置为向UE发送指示消息,以指示所述UE是否根据辅助网络选择参数选择PLMN。
  24. 一种核心网网元,包括:
    存储器;以及
    耦接至所述存储器的处理器,被配置为基于存储在所述存储器中的指令,执行权利要求1-9任意一项所述的方法。
  25. 一种用户设备,包括:
    接收模块,被配置为接收来自核心网网元的指示消息;和
    确定模块,被配置为根据所述指示消息,确定是否根据辅助网络选择参数选择 PLMN。
  26. 一种用户设备,包括:
    存储器;以及
    耦接至所述存储器的处理器,被配置为基于存储在所述存储器中的指令,执行权利要求10-17任意一项所述的方法。
  27. 一种通信系统,包括:
    权利要求23或24所述的核心网网元;和
    权利要求25或26所述的用户设备。
  28. 一种计算机可读存储介质,包括计算机程序指令,其中,所述计算机程序指令被处理器执行时实现权利要求1-22任意一项所述的方法。
  29. 一种计算机程序产品,包括计算机程序,其中,所述计算机程序被处理器执行时实现权利要求1-22任意一项所述的方法。
PCT/CN2023/112887 2022-08-17 2023-08-14 通信方法、系统、核心网网元和用户设备 Ceased WO2024037495A1 (zh)

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