CN116528401B - Communication method, core network element, user equipment and communication system - Google Patents

Communication method, core network element, user equipment and communication system Download PDF

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Publication number
CN116528401B
CN116528401B CN202310786255.4A CN202310786255A CN116528401B CN 116528401 B CN116528401 B CN 116528401B CN 202310786255 A CN202310786255 A CN 202310786255A CN 116528401 B CN116528401 B CN 116528401B
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China
Prior art keywords
satp
base station
board base
network element
core network
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CN116528401A (en
Inventor
王恒
齐文
夏旭
贾靖
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/38—Connection release triggered by timers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Abstract

The disclosure provides a communication method, a core network element, user equipment and a communication system, and relates to the technical field of communication, wherein the communication method comprises the following steps: the core network element transmits SATP to the UE through the on-board base station to instruct the UE to stop transmitting signaling data to the core network through the on-board base station or another on-board base station within a period of time. Thus, the reliability of the on-board base station can be improved.

Description

Communication method, core network element, user equipment and communication system
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a communications method, a core network element, a User Equipment (UE), and a communications system.
Background
In the related art, an air-to-ground integrated network architecture is used to meet the increasing wireless communication demands. The air-ground integrated network architecture comprises a ground network and a non-ground network. An on-board base station is deployed on a satellite of a non-terrestrial network for access by UEs in the terrestrial network.
Disclosure of Invention
However, in the related art, the reliability of the on-board base station is not high.
The on-board base station communicates with the UE via a link (e.g., a serving link) with the UE and with the gateway station via a link (e.g., a feeder link) with the gateway station in the terrestrial network to communicate with the core network.
There is a case where a link between an on-board base station and a UE remains connected, but a link between an on-board base station and a gateway station is disconnected.
In this case, the UE may still transmit data to the on-board base station. The on-board base station may temporarily store the data from the UE and forward the data to the ground network when the link between the on-board base station and the gateway station resumes connection. These data sent by the UE to the on-board base station include signalling data to be sent to the core network.
However, such signaling data is not received by the core network due to being temporarily stored by the on-board base station, resulting in the UE not receiving a response from the core network.
According to the signaling procedure in the related art, the UE retransmits the signaling data multiple times. Because the on-board base station simultaneously provides services for a large number of UEs (especially a large number of terminals of the internet of things), the retransmission mechanism can cause signaling storm, thereby causing paralysis of the on-board base station. Therefore, the reliability of the satellite base station is not high.
In order to solve the above-described problems, the embodiments of the present disclosure propose the following solutions.
According to an aspect of the embodiments of the present disclosure, there is provided a communication method including: the core network element sends a satellite access policy SATP to the user equipment UE through the on-board base station to instruct the UE to stop sending signaling data to the core network through the on-board base station or another on-board base station within a period of time.
In some embodiments, the core network element is a policy control function PCF network element; and the PCF network element sends the SATP to the UE through an access and mobility management function AMF network element, a gateway station and the satellite base station in sequence.
In some embodiments, the PCF network element sends the SATP to the UE during a registration procedure of the UE.
In some embodiments, the PCF network element sends the SATP to the UE during a UE configuration update procedure in the registration procedure.
In some embodiments, the PCF network element sends the SATP to the UE via a message comprising a UE policy container.
In some embodiments, the SATP is carried in the UE policy container.
In some embodiments, the method further comprises: and the PCF network element sends the SATP to the AMF network element during a policy association establishment flow or a policy association modification flow.
In some embodiments, the SATP is configured to instruct the UE to be in a preset mode for a period of time to stop sending signaling data to a core network through the on-board base station or another on-board base station.
In some embodiments, the SATP includes first time information for indicating when the UE enters the preset mode.
In some embodiments, the first time information represents a duration between a time when the SATP is received by the UE and a time when the UE first enters the preset mode after receiving the SATP.
In some embodiments, the SATP includes second time information for indicating when the UE exits the preset mode.
In some embodiments, the second time information represents a maximum duration between a time at which the UE enters the preset mode each time and a time at which the preset mode exits.
In some embodiments, the SATP includes third time information representing a duration between times when the UE enters the preset mode two adjacent times.
In some embodiments, the SATP belongs to the same policy section.
According to another aspect of the embodiments of the present disclosure, there is provided a communication method including: and responding to a satellite access strategy SATP sent by a core network element through the on-board base station, and stopping the User Equipment (UE) from sending signaling data to the core network through the on-board base station or another on-board base station in a period of time.
In some embodiments, in response to the SATP, the UE is in a preset mode for a period of time to cease sending signaling data to a core network through the on-board base station or another on-board base station.
In some embodiments, the SATP includes first time information for indicating when the UE enters the preset mode.
In some embodiments, the first time information represents a duration between a time when the SATP is received by the UE and a time when the UE first enters the preset mode after receiving the SATP.
In some embodiments, the SATP includes second time information for indicating when the UE exits the preset mode.
In some embodiments, the second time information represents a maximum duration between a time at which the UE enters the preset mode each time and a time at which the preset mode exits.
In some embodiments, the SATP includes third time information representing a duration between times when the UE enters the preset mode two adjacent times.
In some embodiments, the UE exits the preset mode after each entry into the preset mode in response to signaling data from the core network.
According to yet another aspect of the embodiments of the present disclosure, there is provided a core network element, including: a module configured to perform the communication method performed by the core network element of any of the embodiments described above.
According to a further aspect of the embodiments of the present disclosure, there is provided a core network element, including: a memory; and a processor coupled to the memory and configured to perform the communication method performed by the core network element of any of the embodiments above based on instructions stored in the memory.
According to still another aspect of the embodiments of the present disclosure, there is provided a user equipment, including: a module configured to perform the communication method performed by the user equipment of any of the above embodiments.
According to still another aspect of the embodiments of the present disclosure, there is provided a user equipment, including: a memory; and a processor coupled to the memory and configured to perform the communication method performed by the user equipment of any of the above embodiments based on instructions stored in the memory.
According to still another aspect of the embodiments of the present disclosure, there is provided a communication system including: the core network element of any one of the embodiments above; and the user equipment as in any one of the above embodiments.
In some embodiments, the user equipment is an internet of things terminal.
According to a further aspect of the disclosed embodiments, a computer readable storage medium is provided, comprising computer program instructions, wherein the computer program instructions, when executed by a processor, implement the communication method according to any one of the embodiments described above.
In the embodiment of the disclosure, the core network element sends the SATP to the UE through the on-board base station to instruct the UE to stop sending signaling data to the core network through the on-board base station within a period of time when the UE accesses the on-board base station. In this way, the UE can stop sending signaling data to the core network through the accessed on-board base station within a period of time when the link between the accessed on-board base station and the gateway station is disconnected, so that the UE can be prevented from retransmitting the signaling data to the accessed on-board base station multiple times when the UE does not receive a response from the core network. Thus, the possibility of paralysis of the on-board base station can be reduced, and the reliability of the on-board base station can be improved.
The technical scheme of the present disclosure is described in further detail below through the accompanying drawings and examples.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a flow diagram of a communication method according to some embodiments of the present disclosure.
Fig. 2 is a flow chart of a communication method according to further embodiments of the present disclosure.
Fig. 3 is a flow diagram of a communication method according to further embodiments of the present disclosure.
Fig. 4 is a schematic structural diagram of a core network element according to some embodiments of the present disclosure.
Fig. 5 is a schematic structural diagram of a core network element according to further embodiments of the present disclosure.
Fig. 6 is a schematic diagram of a structure of a UE according to some embodiments of the present disclosure.
Fig. 7 is a schematic diagram of a UE according to further embodiments of the present disclosure.
Fig. 8 is a schematic diagram of a communication system according to some embodiments of the present disclosure.
Detailed Description
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments in this disclosure without inventive faculty, are intended to fall within the scope of this disclosure.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Fig. 1 is a flow diagram of a communication method according to some embodiments of the present disclosure.
As shown in fig. 1, the communication method includes step 102.
In step 102, the core network element transmits a satellite access policy (Satellite access Policy, SATP) to the UE via the on-board base station to instruct the UE to cease transmitting signaling data to the core network via the on-board base station for a period of time.
The core network element may be, for example, a core network element under a network architecture such as a fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G) and a sixth generation mobile communication technology (6th Generation Mobile Communication Technology,6G). The UE may be a mobile terminal such as a mobile phone or an internet of things terminal such as a monitoring sensor. Stopping the UE from sending signaling data to the core network through the on-board base station may include, but is not limited to, periodic registration requests, session establishment requests, and the like.
In some embodiments, the core network element sends SATP to the UE through a certain on-board base station to instruct the UE to stop sending signaling data to the core network through the same on-board base station for a period of time.
For example, in the case where the link between the UE and the on-board base station a remains connected (i.e., the UE is currently accessing the on-board base station a), and the link between the on-board base station a and the gateway station also remains connected, the core network element has known in advance that the link between the on-board base station a and the gateway station will be disconnected for a period of time when the link between the on-board base station a and the UE remains connected.
In this case, the core network element sends SATP to the UE through the on-board base station a to which the UE is connected, so as to instruct the UE to stop actively sending signaling data to be sent to the core network to the on-board base station a in a period of time when the link between the connected on-board base station a and the gateway station is disconnected.
In other embodiments, the core network element transmits SATP to the UE through one of the on-board base stations to instruct the UE to cease transmitting signaling data to the core network through another of the on-board base stations for a period of time.
For example, in case the link between the UE and the on-board base station a remains connected and the link between the on-board base station a and the gateway station also remains connected, the core network element has known in advance that the UE will access another on-board base station B and that the link between the on-board base station B and the gateway station will be disconnected for a period of time when the link between the on-board base station B and the UE remains connected.
In this case, the core network element sends SATP to the UE through the on-board base station a to which the UE is currently connected, so as to instruct the UE to stop actively sending signaling data to be sent to the core network to the on-board base station B in a period of time when the link between the connected on-board base station B and the gateway station is disconnected.
In still other embodiments, the core network element transmits SATP to the UE through one of the on-board base stations to instruct the UE to cease transmitting signaling data to the core network through the one of the on-board base stations for a period of time and to cease transmitting signaling data to the core network through another one of the on-board base stations for another period of time.
In the above embodiment, the core network element sends SATP to the UE through the on-board base station, so as to instruct the UE to stop sending signaling data to the core network through the on-board base station in a period of time when the UE accesses the on-board base station. In this way, the UE can stop sending signaling data to the core network through the accessed on-board base station within a period of time when the link between the accessed on-board base station and the gateway station is disconnected, so that the UE can be prevented from retransmitting the signaling data to the accessed on-board base station multiple times when the UE does not receive a response from the core network. Thus, the possibility of paralysis of the on-board base station can be reduced, and the reliability of the on-board base station can be improved.
The communication method shown in fig. 1 is further described below in connection with some embodiments.
In some embodiments, the core network element is a policy control function (Policy Control Function, PCF) network element. Thus, the existing PCF network element in the core network may send SATP to the UE without adding additional network elements in the core network.
As some implementations, the PCF network element sends SATP to the UE sequentially through an access and mobility management function (Access and Mobility Management Function, AMF) network element, a gateway station, and an on-board base station. In this way, the PCF network element may send SATP to the UE over an existing path.
In some embodiments, the PCF network element sends the SATP to the UE during a registration procedure (registration procedure) of the UE.
As some implementations, the PCF network element sends SATP to the UE during the UE configuration update procedure (UE configuration update procedure) in the registration procedure.
Thus, the PCF network element can send SATP to the UE through the existing signaling flow without adding additional signaling flow, thereby reducing signaling interaction.
In some embodiments, the PCF network element sends the SATP to the UE via a message containing a UE policy container (UE policy container). In this way, the PCF network element may send SATP to the UE via an existing message containing the UE policy container.
As some implementations, SATP is carried in the UE policy container. In this way, the PCF network element may send the SATP to the UE carried in the existing UE policy container field without adding additional fields.
For example, the PCF network element may send a message containing the UE policy container carrying SATP to the AMF network element with a Namf Communication N1N2 messaging service so that the AMF network element transparently passes the message to the UE through the on-board base station.
In some embodiments, the PCF network element may also send SATP to the AMF network element during a policy association establishment procedure (policy association establishment procedure) or a policy association modification procedure (policy association modification procedure). As such, the AMF network element may establish a policy association for the served UE.
The SATP sent by the core network element to the UE is further described below in connection with some embodiments.
In some embodiments, the SATP is used to instruct the UE to be in a preset mode for a period of time to stop sending signaling data to the core network through the on-board base station. In other words, in the preset mode, the UE stops transmitting signaling data to the core network through the on-board base station.
For example, the SATP may include a preset pattern indicator to indicate that the UE is in a preset pattern to stop transmitting signaling data to the core network through the on-board base station for a period of time.
As some implementations, SATP may instruct the UE to switch between two modes, a preset mode and a normal mode, respectively.
In the preset mode, the UE stops sending signaling data to the core network through the on-board base station, but can still send service data through the on-board base station. The on-board base station may temporarily store traffic data from the UE and forward the stored traffic data to the gateway station in case the link with the gateway station is restored. Since the preset mode of the UE corresponds to a stage in which the on-board base station provides temporary storage and subsequent forwarding services, the preset mode may also be referred to as a store-and-forward mode (Store and Forward mode, S & F mode).
In the normal mode, the UE can normally send signaling data of the core network to the on-board base station, and can normally send service data to the on-board base station.
In this way, the core network element may instruct the UE to be in the preset mode for a period of time, so that the UE stops actively sending signaling data of the core network to the on-board base station for a period of time.
In some embodiments, the SATP includes first time information for indicating when the UE enters a preset mode.
As some implementations, the first time information may represent a duration Tenter between a time when the UE receives the SATP and a time when the UE enters the preset mode for the first time after receiving the SATP.
In the above embodiment, the core network element transmits the SATP including the first time information to the UE, so that the UE stops transmitting the signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is just disconnected according to the first time information. Thus, the reliability of the satellite base station can be further improved.
In other embodiments, the SATP includes second time information for indicating when the UE exits the preset mode.
As some implementations, the second time information represents a maximum duration Tmax between a time when the UE enters the preset mode and a time when the UE exits the preset mode each time.
In other words, after each time the UE enters the preset mode, the UE needs to exit the preset mode after the time period Tmax, but the UE may also exit the preset mode in advance for other reasons. Thus, tmax is the maximum duration between the moment when the UE enters the preset mode each time and the moment when it exits the preset mode.
In the above embodiment, the core network element sends the SATP including the second time information to the UE, so that the UE exits the preset mode when the link between the accessed on-board base station and the gateway station is restored to the connection according to the second time information, and thus can send signaling data to the core network through the on-board base station. In this way, the communication quality of the UE can be improved.
In further embodiments, the SATP includes third time information representing a duration Tperiod between times when the UE has entered the preset mode two adjacent times.
The duration Tperiod represented by the third time information is the execution period. It will be appreciated that Tpmeriod is greater than the sum of Tenter and Tmax. That is, tperiod is greater than Tenter, and Tperiod is greater than Tmax.
In the above embodiment, the core network element only needs to send the SATP to the UE once through the on-board base station, so that the UE can periodically stay in a preset mode of stopping sending signaling data to the core network through the on-board base station according to the third time information in the SATP when the link between the accessed on-board base station and the gateway station is periodically disconnected. Therefore, the pressure of data transmission of the satellite base station can be reduced, and the reliability of the satellite base station can be further improved.
In still other embodiments, the SATP includes a priority.
As some implementations, the core network element may send an SATP list including a plurality of SATPs to the UE through the on-board base station. Different ones of the plurality of SATPs may correspond to different on-board base stations, and the different SATPs may include different priorities.
In the above embodiment, the core network element sends the SATP including the priority to the UE, so that in the case of sending the SATP list to the UE, the UE can accurately execute one SATP in the SATP list according to the priority of each SATP. In this way, the UE can be prevented from stopping sending signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is not disconnected according to the information (such as the first time information, the second time information and the third time information) in the wrong SATP, and the UE can be prevented from still not stopping sending signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is disconnected. Thus, the communication quality of the UE can be improved, and the reliability of the satellite base station can be improved.
In still other embodiments, the SATP includes a maximum amount of data. The maximum data amount represents the total amount of data that the UE can transmit to the on-board base station during each time in the preset mode, and may be in Megabytes (MB).
During the UE is in the preset mode, the on-board base station stores traffic data from the UE. The core network element transmits SATP including the maximum data amount to the UE so that the UE controls the total amount of data transmitted to the on-board base station during each time in the preset mode according to the maximum data amount. Therefore, the pressure of data storage of the satellite base station can be reduced, and the reliability of the satellite base station can be further improved.
In some embodiments, the SATP sent by the core network element includes at least one of first time information, second time information, third time information, priority, and maximum data amount.
For example, the SATP includes any one, any two, any three, or any four of the first time information, the second time information, the third time information, the priority, and the maximum data amount. For another example, the SATP includes first time information, second time information, third time information, priority, and a maximum data amount.
In some embodiments, the core network element may also instruct the UE to clear previously received failed SATPs. For example, after the core network element transmits the SATP corresponding to a certain satellite base station to the UE, information in the SATP changes. In this case, the SATP received by the UE fails, and the core network element may instruct the UE to clear the SATP. In this way, the pressure of the storage of the UE can be relieved, thereby improving the reliability of the UE.
In some embodiments, the SATP belongs to the same policy section (policy section). That is, SATP is not partitioned across policy sections.
The core network element sends the SATP as the same strategy node to the UE, so that the UE does not need to carry out combination processing after receiving the SATP. In this way, the processing pressure of the UE can be reduced to improve the reliability of the UE, and the UE can stop sending signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is disconnected more on time, so that the reliability of the on-board base station can be further improved.
Fig. 2 is a flow chart of a communication method according to further embodiments of the present disclosure.
As shown in fig. 2, the communication method includes step 202.
In step 202, in response to the SATP sent by the core network element through the on-board base station, the UE stops sending signaling data to the core network through the on-board base station for a period of time.
In some embodiments, in response to the SATP being sent by the core network element through a certain on-board base station, the UE stops sending signaling data to the core network through the same on-board base station for a period of time.
In other embodiments, the UE stops sending signaling data to the core network through another on-board base station for a period of time in response to the SATP sent by the core network element through one on-board base station.
In still other embodiments, in response to the SATP being transmitted by the core network element through one of the on-board base stations, the UE stops transmitting signaling data to the core network through the on-board base station for a period of time and stops transmitting signaling data to the core network through another of the on-board base stations for another period of time.
In the above embodiment, in response to the SATP sent by the core network element through the on-board base station, the UE stops sending signaling data to the core network through the on-board base station for a period of time. In this way, the UE may stop sending signaling data to the core network through the accessed on-board base station within a period of time when the link between the accessed on-board base station and the gateway station is disconnected, so that retransmission of the signaling data to the accessed on-board base station multiple times when no response from the core network is received can be avoided. Thus, the possibility of paralysis of the on-board base station can be reduced, and the reliability of the on-board base station is improved.
The communication method shown in fig. 2 is further described below in connection with some embodiments.
In some embodiments, the core network element is a PCF network element. As some implementations, the UE receives SATP sent by the PCF network element sequentially through the AMF network element, the gateway station, and the on-board base station.
In some embodiments, the UE receives SATP sent by the PCF network element during the registration procedure of the UE. As some implementations, the UE receives the SATP sent by the PCF network element during the UE configuration update procedure in the registration procedure.
In some embodiments, the UE receives SATP sent by the PCF network element via a message containing a UE policy container. For example, the UE receives a message transparently passed by the AMF network element that includes SATP and a UE policy container. As some implementations, SATP is carried in the UE policy container.
In some embodiments, the UE is an internet of things terminal, e.g., a monitoring sensor or the like. Because the Internet of things terminal is massive, the massive Internet of things terminal retransmits signaling data to the on-board base station more likely to cause breakdown of the on-board base station.
In the above embodiment, it is ensured that the terminal of the internet of things can stop sending signaling data to the core network through the satellite base station for a period of time in response to the SATP from the network element of the core network. This may further improve the reliability of the on-board base station.
The SATP received by the UE is further described below in connection with some embodiments.
In some embodiments, the SATP is used to instruct the UE to be in a preset mode for a period of time to stop sending signaling data to the core network through the on-board base station. In other words, in the preset mode, the UE stops transmitting signaling data to the core network through the on-board base station.
For example, the UE may be in a preset mode of stopping signaling data transmission to the core network through the on-board base station for a period of time according to a preset mode indicator in the SATP.
As some implementations, the UE may be configured to switch between a preset mode and a normal mode.
In a preset mode (i.e. a store-and-forward mode), the UE stops sending signaling data to the core network through the on-board base station, but can still send traffic data normally through the on-board base station. In the normal mode, the UE can normally transmit the signaling data of the core network through the on-board base station, and can normally transmit the service data through the on-board base station.
As such, in response to SATP, the UE may be in a preset mode for a period of time to cease transmitting signaling data to the core network through the on-board base station.
In some embodiments, the SATP includes first time information for indicating when the UE enters a preset mode.
As some implementations, the first time information may represent a duration Tenter between a time when the UE receives the SATP and a time when the UE enters the preset mode for the first time after receiving the SATP.
For example, in response to SATP from a core network element, the UE starts an entry timer. When the time counted by the entry timer reaches the Tenter, the UE enters a preset mode for the first time.
In the above embodiment, according to the first time information in the SATP, the UE may stop sending signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is just disconnected. Thus, the reliability of the satellite base station can be further improved.
In other embodiments, the SATP includes second time information for indicating when the UE exits the preset mode.
As some implementations, the second time information represents a maximum duration Tmax between a time when the UE enters the preset mode and a time when the UE exits the preset mode each time.
For example, the UE starts an exit timer (exit timer) each time a preset mode is entered. When the exit timer times up to Tmax, the UE exits the preset mode.
In the above embodiment, according to the second time information in the SATP, the UE can send signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is just restored to the connection. In this way, the communication quality of the UE can be improved.
In further embodiments, the SATP includes third time information representing a duration Tperiod between times when the UE has entered the preset mode two adjacent times.
For example, the UE starts a timer each time a preset mode is entered. When the timer reaches Tmax, the UE exits the preset mode. Then, when the timer continues to count to Tperiod, the UE enters the preset mode again and restarts the timer, so that the preset mode can be periodically entered and exited.
In the above embodiment, the UE may periodically stop sending the signaling data to the core network through the on-board base station according to the third time information in the SATP when the link between the accessed on-board base station and the gateway station is periodically disconnected. Therefore, the pressure of data transmission of the satellite base station can be reduced, and the reliability of the satellite base station can be further improved.
In still other embodiments, the SATP includes a priority.
For example, the UE may receive an SATP list including a plurality of SATPs transmitted by a core network element through an on-board base station. Different ones of the plurality of SATPs may correspond to different on-board base stations, and the different SATPs may include different priorities.
In this case, in response to the SATP list, the UE may perform one of the highest priority SATPs in the SATP list. That is, the SATP in step 202 may be the one with the highest priority in the SATP list.
In the above embodiment, the UE may accurately determine, in the case of receiving the SATP list, one SATP to be executed according to the priority in the SATP, so as to stop sending signaling data to the core network through the satellite base station corresponding to the SATP for a period of time. In this way, the UE can be prevented from stopping sending signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is not disconnected according to the information (such as the first time information, the second time information and the third time information) in the wrong SATP, and the UE can be prevented from still not stopping sending signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is disconnected. Thus, the communication quality of the UE can be improved, and the reliability of the satellite base station can be improved.
In still other embodiments, the SATP includes a maximum amount of data. The maximum data amount represents the total amount of data that the UE can transmit to the on-board base station during each time in the preset mode, which may be in megabytes.
During the UE is in the preset mode, the on-board base station stores traffic data. The UE controls the total amount of data transmitted to the on-board base station during each time in the preset mode according to the maximum amount of data in the SATP. Therefore, the pressure of data storage of the satellite base station can be reduced, and the reliability of the satellite base station is further improved.
In some embodiments, the SATP received by the UE includes at least one of first time information, second time information, third time information, priority, and maximum data amount.
For example, the SATP includes any one, any two, any three, or any four of the first time information, the second time information, the third time information, the priority, and the maximum data amount. For another example, the SATP includes first time information, second time information, third time information, priority, and a maximum data amount.
In some embodiments, the UE exits the preset mode after each entry into the preset mode in response to signaling data from the core network.
The UE is able to receive signalling data from the core network indicating that the link between the satellite base station to which the UE has access and the gateway station is connected. In this case, the UE exits the preset mode in time in response to the signaling data of the core network, so as to normally transmit the signaling data to the core network through the on-board base station. In this way, the communication quality of the UE can be improved.
In some embodiments, the UE may also clear previously received failed SATPs. As some implementations, the UE may clear the failed SATP according to the indication of the core network element. As other implementations, the UE may autonomously clear the failed SATP. Therefore, the storage pressure of the UE can be relieved, and the reliability of the UE is improved.
In some embodiments, SATP belongs to the same policy section. In this case, on the one hand, the UE does not need to perform the combining process after receiving the SATP, so that the processing pressure of the UE can be reduced to improve the reliability of the UE. On the other hand, the UE can stop sending signaling data to the core network through the on-board base station when the link between the accessed on-board base station and the gateway station is disconnected more on time, so that the reliability of the on-board base station can be further improved.
Fig. 3 is a flow diagram of a communication method according to further embodiments of the present disclosure.
Fig. 3 schematically shows that the core network element in step 102 and step 202 is a PCF network element. As shown in FIG. 3, the communication method includes steps 302-308.
In step 302, the PCF network element sends a message containing the UE policy container to the AMF network element with the Namf communication N1N2 messaging service, and the AMF network element receives the message from the PCF network element.
The UE policy container carries SATP. In some embodiments, the UE policy container in the message carries one SATP. In other embodiments, the UE policy container in the message carries an SATP list comprising a plurality of SATPs.
Each SATP may include a priority, a store-and-forward mode indicator, and a store-and-forward policy. The store-and-forward policy may include first time information, second time information, third time information, and a maximum data amount.
Taking a certain SATP as an example, the format may be satp= { priority= 1,S&F Mode Indicator =on, S & F policy= { Enter timer=100, max S & F time=300, max data volume=100, period=3600 }.
"priority=1" means that the priority of the SATP is 1."S & F Mode indicator=on" indicates that the store-and-forward Mode Indicator (i.e., preset Mode Indicator) is On. "S & F Policy" means a store-and-forward Policy including Tenter indicated by the first time information, tmax indicated by the second time information, tperiod indicated by the third time information, and the maximum data amount.
"Enter timer=100" indicates that Tenter is 100 seconds, and is used to instruct the UE to Enter the store-and-forward mode 100 seconds after receiving the SATP.
"Max S & F time=300" means Tmax is 300 seconds for instructing the UE to exit the store-and-forward mode every 300 seconds after entering the store-and-forward mode.
"period=3600" indicates Tperiod of 3600 seconds, and is used to instruct the UE to enter the store-and-forward mode again when 3600 seconds after entering the store-and-forward mode each time.
"max data volume=100" means that the maximum data amount is 100MB, for indicating that the total amount of data transmitted to the on-board base station by the UE during each time in the store-and-forward mode does not exceed 100MB.
In step 304, the amf network element performs UE policy delivery. That is, the AMF network element transmits a message containing the UE policy container to the UE, and the UE receives the message containing the UE policy container.
As some implementations, the AMF network element transparently passes messages containing the UE policy container to the UE.
In step 306, the UE sends a UE policy delivery result to the AMF network element, and the AMF network element receives the UE policy delivery result from the UE.
In step 308, the amf network element forwards the response of the UE to the PCF network element with a Namf Communication N1message notification (namf_communication_n1 message), and the PCF network element receives the response of the UE.
In step 310, the UE performs SATP in response to SATP from the PCF network element.
The procedure for the UE to perform SATP is described below with the foregoing satp= { priority= 1,S&F Mode Indicator =on, S & F policy= { Enter timer=100, max S & F time=300, max data volume=100, period=3600 }.
Upon receiving the SATP, the UE starts an entry timer. Before the entry timer counts up to 100 seconds, the UE is in normal mode, i.e. capable of transmitting traffic data and signaling data of the core network through the on-board base station.
When the entry timer reaches 100 seconds, the UE enters a store-and-forward mode and starts an exit timer and an execution period timer. Before the exit timer counts up to 300 seconds, the UE is in store-and-forward mode, i.e., capable of sending traffic data through the on-board base station, but not capable of sending signaling data to the core network through the on-board base station.
When the exit timer counts up to 300 seconds, or when the exit timer counts up to 300 seconds but receives signaling data from the core network, the UE exits the store-and-forward mode and enters the normal mode.
Before the execution period timer times 3600 seconds, the UE is in normal mode.
When the execution period timer reaches 3600 seconds, the UE enters the store-and-forward mode again, and starts the exit timer and the execution period timer again. The subsequent flow is consistent with the foregoing, and will not be described here again.
In the above embodiment, the PCF network element may send the SATP to the UE based on the existing signaling procedure, and the UE may receive the SATP from the PCF network element based on the existing signaling procedure. Therefore, the reliability of the satellite base station can be improved on the basis of not adding additional signaling flow and not adding additional core network elements.
The embodiment of the disclosure also provides a core network element. The core network element may be, for example, a PCF network element.
In some embodiments, the core network element comprises means for performing the communication method performed by the core network element of any of the embodiments described above.
In other embodiments, the core network element includes a memory, and a processor coupled to the memory. The processor is configured to perform the communication method performed by the core network element of any of the above embodiments based on instructions stored in the memory.
Fig. 4 is a schematic structural diagram of a core network element according to some embodiments of the present disclosure.
As shown in fig. 4, the core network element 400 may comprise a sending module 401.
The transmitting module 401 may be configured to transmit SATP to the UE through the on-board base station to instruct the UE to stop transmitting signaling data to the core network through the on-board base station for a period of time.
The core network element 400 may further include other modules to perform operations performed by the core network element (e.g., PCF network element) of any of the embodiments described above, which are not described in detail herein.
Fig. 5 is a schematic structural diagram of a core network element according to further embodiments of the present disclosure.
As shown in fig. 5, the core network element 500 includes a memory 501 and a processor 502 coupled to the memory 501, where the processor 502 is configured to execute the communication method performed by the core network element of any of the above embodiments based on the instructions stored in the memory 501.
Memory 501 may include, for example, system memory, fixed nonvolatile storage media, and the like. The system memory may store, for example, an operating system, application programs, boot Loader (Boot Loader), and other programs.
The core network element 500 may further comprise an input-output interface 503, a network interface 504, a storage interface 505, etc. These input/output interfaces 503, network interface 504, storage interface 505, and memory 501 and processor 502 may be connected by, for example, a bus 506. The input output interface 503 provides a connection interface for input output devices such as a display, mouse, keyboard, touch screen, etc. Network interface 504 provides a connection interface for various networking devices. The storage interface 505 provides a connection interface for external storage devices such as SD cards, U discs, and the like.
The embodiment of the disclosure also provides the UE. The UE may be, for example, an internet of things terminal that monitors latency tolerance of a sensor.
In some embodiments, the UE includes means for performing the communication method performed by the UE of any of the embodiments described above.
In other embodiments, the core network element includes a memory, and a processor coupled to the memory. The processor is configured to perform the communication method performed by the UE of any of the above embodiments based on instructions stored in the memory.
Fig. 6 is a schematic diagram of a structure of a UE according to some embodiments of the present disclosure.
As shown in fig. 6, the UE 600 may include a policy enforcement module 601.
The policy enforcement module 601 may be configured to stop sending signaling data to the core network through the on-board base station for a period of time in response to the core network element transmitting SATP through the on-board base station.
The UE 600 may also include other modules to perform the operations performed by the UE of any of the embodiments described above, which are not described in detail herein.
Fig. 7 is a schematic diagram of a UE according to further embodiments of the present disclosure.
As shown in fig. 7, the UE 700 includes a memory 701 and a processor 702 coupled to the memory 701, the processor 702 being configured to perform the communication method performed by the UE of any of the above embodiments based on instructions stored in the memory 701.
The memory 701 may include, for example, system memory, fixed nonvolatile storage media, and the like. The system memory may store, for example, an operating system, application programs, boot Loader (Boot Loader), and other programs.
The UE 700 may also include an input-output interface 703, a network interface 704, a storage interface 705, and the like. These input/output interfaces 703, network interfaces 704, storage interfaces 705, and between the memory 701 and the processor 702 may be connected by a bus 706, for example. The input/output interface 703 provides a connection interface for input/output devices such as a display, mouse, keyboard, touch screen, etc. The network interface 704 provides a connection interface for various networking devices. The storage interface 705 provides a connection interface for external storage devices such as SD cards, U discs, and the like.
Fig. 8 is a schematic diagram of a communication system according to some embodiments of the present disclosure.
As shown in fig. 8, the communication system includes a core network element 801 and a UE 802. The core network element 801 may be, for example, the core network element 400/500. The UE 802 may be, for example, the UE 600/700. The core network element 801 is schematically shown in fig. 8 as a PCF network element.
In some embodiments, the communication system further comprises an on-board base station 803 and a gateway station 804. The UE 802 is schematically shown in fig. 8 to communicate with an on-board base station 803 based on a service link, and the on-board base station 803 to communicate with a gateway station 804 based on a feeder link.
The on-board base station 803 may be configured to receive traffic data from the UE 802 in case of a service link connection, a feeder link disconnection, and store the traffic data to forward the stored traffic data to the gateway station 804 in case of a feeder link restoration connection.
In some embodiments, in the case that the core network element 801 is a PCF network element, the communication system further includes an AMF network element 805 shown in fig. 8.
The AMF network element 805 may be configured to send SATP from the PCF network element 801 to the UE 802. For example, AMF network element 805 may send SATP from PCF network element 801 to UE 802 via gateway station 804 and on-board base station 803 in sequence.
The disclosed embodiments also provide a computer readable storage medium comprising computer program instructions which, when executed by a processor, implement the communication method of any of the above embodiments.
The disclosed embodiments also provide a computer program product comprising a computer program which, when executed by a processor, implements the communication method of any of the above embodiments.
Thus, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, so that the same or similar parts between the embodiments are mutually referred to. For the core network element, the UE and the communication system embodiments, the description is relatively simple, and the relevant points are referred to in the description of the method embodiments, since they basically correspond to the method embodiments.
It will be appreciated by those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining 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 storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that functions specified in one or more of the flowcharts and/or one or more of the blocks in the block diagrams may be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (26)

1. A method of communication, comprising:
during the registration process of User Equipment (UE), a Policy Control Function (PCF) network element transmits a satellite access policy (SATP) to the UE through an on-board base station to instruct the UE to be in a preset mode in a period of time so as to stop transmitting signaling data to a core network through the on-board base station or another on-board base station;
wherein in the preset mode, the UE is capable of transmitting traffic data through the on-board base station or another on-board base station, and the SATP includes a maximum data amount representing a total amount of data that the UE is capable of transmitting to the on-board base station or another on-board base station during each time in the preset mode.
2. The method according to claim 1, wherein:
the PCF network element sends the SATP to the UE through an access and mobility management function AMF network element, a gateway station and the satellite base station in sequence.
3. The method of claim 1, wherein the PCF network element sends the SATP to the UE during a UE configuration update procedure in the registration procedure.
4. The method of claim 3, wherein the PCF network element sends the SATP to the UE via a message comprising a UE policy container.
5. The method of claim 4, wherein the SATP is carried in the UE policy container.
6. The method of claim 1, further comprising:
and the PCF network element sends the SATP to an AMF network element during a policy association establishment flow or a policy association modification flow.
7. The method of claim 1, wherein the SATP further comprises first time information indicating when the UE enters the preset mode.
8. The method of claim 7, wherein the first time information represents a duration between a time when the SATP is received by the UE and a time when the UE first enters the preset mode after receiving the SATP.
9. The method of claim 1, wherein the SATP further comprises second time information indicating when the UE exits the preset mode.
10. The method of claim 9, wherein the second time information represents a maximum duration between a time of each entry of the UE into the preset mode and a time of exit of the preset mode.
11. The method of claim 1, wherein the SATP further comprises third time information representing a duration between times when the UE enters the preset mode two adjacent times.
12. The method of claim 1, wherein the SATP belongs to the same policy section.
13. A method of communication, comprising:
responding to a satellite access strategy SATP sent by a policy control function PCF network element through an on-board base station during a registration process of User Equipment (UE), wherein the UE is in a preset mode in a period of time so as to stop sending signaling data to a core network through the on-board base station or another on-board base station;
wherein in the preset mode, the UE is capable of transmitting traffic data through the on-board base station or another on-board base station, and the SATP includes a maximum data amount representing a total amount of data that the UE is capable of transmitting to the on-board base station or another on-board base station during each time in the preset mode.
14. The method of claim 13, wherein the SATP further comprises first time information indicating when the UE enters the preset mode.
15. The method of claim 14, wherein the first time information represents a duration between a time when the SATP is received by the UE and a time when the UE first enters the preset mode after receiving the SATP.
16. The method of claim 13, wherein the SATP further comprises second time information indicating when the UE exits the preset mode.
17. The method of claim 16, wherein the second time information represents a maximum duration between a time of each entry of the UE into the preset mode and a time of exit of the preset mode.
18. The method of claim 13, wherein the SATP further comprises third time information representing a duration between times when the UE enters the preset pattern twice.
19. The method of claim 13, wherein the UE exits the preset mode after each entry into the preset mode in response to signaling data from a core network.
20. A core network element, being a policy control function network element, comprising:
a module configured to perform the communication method of any of claims 1-12.
21. A core network element, being a policy control function network element, comprising:
a memory; and
a processor coupled to the memory and configured to perform the communication method of any of claims 1-12 based on instructions stored in the memory.
22. A user equipment, comprising:
a module configured to perform the communication method of any of claims 13-19.
23. A user equipment, comprising:
a memory; and
a processor coupled to the memory and configured to perform the communication method of any of claims 13-19 based on instructions stored in the memory.
24. A communication system, comprising:
the core network element of claim 20 or 21; and
the user equipment of claim 22 or 23.
25. The communication system of claim 24, wherein the user equipment is an internet of things terminal.
26. A computer readable storage medium comprising computer program instructions, wherein the computer program instructions, when executed by a processor, implement the communication method of any of claims 1-19.
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