CN117833981A - Method, system, equipment and medium for reducing message delay of low-orbit satellite system - Google Patents

Method, system, equipment and medium for reducing message delay of low-orbit satellite system Download PDF

Info

Publication number
CN117833981A
CN117833981A CN202311781457.6A CN202311781457A CN117833981A CN 117833981 A CN117833981 A CN 117833981A CN 202311781457 A CN202311781457 A CN 202311781457A CN 117833981 A CN117833981 A CN 117833981A
Authority
CN
China
Prior art keywords
satellite
upf
message
terminal
sends
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311781457.6A
Other languages
Chinese (zh)
Inventor
万南平
郝莉
于永涛
施渊籍
石晶林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhongke Nanjing Mobile Communication And Computing Innovation Research Institute
Original Assignee
Zhongke Nanjing Mobile Communication And Computing Innovation Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhongke Nanjing Mobile Communication And Computing Innovation Research Institute filed Critical Zhongke Nanjing Mobile Communication And Computing Innovation Research Institute
Priority to CN202311781457.6A priority Critical patent/CN117833981A/en
Publication of CN117833981A publication Critical patent/CN117833981A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

The invention discloses a method, a system, equipment and a medium for reducing message delay of a low-orbit satellite system. For the method of the embodiment of the invention, in the process of first sending the message to the second terminal by the first terminal, the UPF of the ground station is utilized to find out the first route information and feed back the first route information to the UPF of the first satellite where the first terminal is located, so that the UPF of the first satellite can directly transmit the message to the UPF of the second satellite based on the first route information when the subsequent first terminal sends the message to the second terminal each time, thereby realizing that the message is only transmitted between satellites when the terminals interact, and reducing the processing of forwarding through the ground station. Therefore, by utilizing the method of the embodiment of the invention, the transmission delay of the low-orbit satellite system can be reduced by at least 50%, and the use of satellite-ground link resources is reduced.

Description

Method, system, equipment and medium for reducing message delay of low-orbit satellite system
Technical Field
The present invention relates to the field of satellite network communications technologies, and in particular, to a method, a system, an apparatus, and a medium for reducing packet delay in a low-orbit satellite system.
Background
The 3GPP has developed standardization work for NTN (Non-Terrestrial Network ) and sat_arch, aiming at combining a 5G network with satellites. ITU-R developed the ngat_sat legislation and proposed the integration of satellite systems into next generation mobile communication systems. The 3GPP officially studied NTN was originally approved for the project of Study (SI) on NTN in R15 released in 3 months 2017. Thereafter, 3GPP has been identifying key challenges, attempting to extend the standardized air interface waveforms and protocols of terrestrial cellular networks to the sky, and proposing potential solutions to integrate NTNs into 5G NR systems.
The 3GPP 38821 protocol defines a 5G NTN network, gNB is deployed on a satellite, and after the 5GC is deployed on a ground gateway station, gNB interacts with the 5GC through an inter-satellite link and a satellite-ground link. UE1 and UE2 execute registration and PDU session establishment to complete network access, IP service interaction is carried out between UE1 and UE2, on the basis of enabling LAN technology by 5GC, a message of UE1 reaches UPF of the ground 5GC through an inter-satellite link/an inter-satellite link, and the UPF reaches UE2 through the inter-satellite link/the inter-satellite link. In the whole interaction process, inter-satellite link/satellite-ground link resources are required to be consumed, and meanwhile, transmission delay is also large.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a method for reducing message delay of a low-orbit satellite system, which solves the problems of overlarge transmission delay and satellite-ground link resource occupation of the current low-orbit satellite communication.
The invention also provides a low-orbit satellite system message delay reducing system, a low-orbit satellite system message delay reducing device and a computer readable storage medium.
According to an embodiment of the first aspect of the present invention, a method for reducing message delay in a low-orbit satellite system includes the following steps:
the first terminal and the second terminal access the network and establish PDU conversation, and apply for the I-UPF resource of the first satellite and the I-UPF resource of the second satellite respectively;
the first terminal sends a first message to the I-UPF of the first satellite, and the I-UPF of the first satellite sends the first message to the UPF of the affiliated ground station;
based on the address of the second terminal, the UPF of the ground station searches the I-UPF of the second satellite where the second terminal is located so as to obtain first routing information;
the UPF of the ground station sends the first message to the I-UPF of the second satellite and feeds back the first route information to the I-UPF of the first satellite;
the I-UPF of the second satellite sends the first message to the second terminal;
the first terminal sends a second message to the I-UPF of the first satellite, and based on the first route information, the I-UPF of the first satellite directly sends the second message to the I-UPF of the second satellite;
and the I-UPF of the second satellite sends the second message to the second terminal.
The method for reducing the message delay of the low-orbit satellite system has the following advantages:
in the process that the first terminal sends the message to the second terminal for the first time, the UPF of the ground station is utilized to find out the first route information and feed the first route information back to the UPF of the first satellite where the first terminal is located, so that when the subsequent first terminal sends the message to the second terminal each time, the UPF of the first satellite can directly transmit the message to the UPF of the second satellite based on the first route information, and therefore the message is only transmitted between satellites during terminal interaction, and the process of forwarding through the ground station is reduced. Therefore, by utilizing the method of the embodiment of the invention, the transmission delay of the low-orbit satellite system can be reduced by at least 50%, and the use of satellite-ground link resources is reduced.
According to some embodiments of the present invention, the method for reducing message latency in a low-orbit satellite system further includes the following steps:
the second terminal sends a third message to the I-UPF of the second satellite, and the I-UPF of the second satellite sends the third message to the UPF of the affiliated ground station;
based on the address of the first terminal, the UPF of the ground station searches the I-UPF of the first satellite where the first terminal is located so as to obtain second routing information;
the UPF of the ground station sends the third message to the I-UPF of the first satellite and feeds back the second routing information to the I-UPF of the second satellite;
the I-UPF of the first satellite sends the third message to the first terminal;
the second terminal sends a fourth message to the I-UPF of the second satellite, and based on the second routing information, the I-UPF of the second satellite directly sends the fourth message to the I-UPF of the first satellite;
and the I-UPF of the first satellite sends the fourth message to the first terminal.
According to some embodiments of the present invention, when the satellite where the second terminal is located is changed from the second satellite to a third satellite, the method for reducing the message delay of the low-orbit satellite system further includes the following steps:
the first terminal sends a fifth message to the I-UPF of the first satellite;
based on the first routing information, the I-UPF of the first satellite sends the fifth message to the I-UPF of the second satellite, the second terminal fails to receive the fifth message, and the I-UPF of the first satellite sends the fifth message to the UPF of the affiliated ground station;
the UPF of the ground station updates and searches the I-UPF of the third satellite where the second terminal is located so as to obtain third routing information;
the UPF of the ground station sends the fifth message to the I-UPF of the third satellite and feeds back the third route information to the I-UPF of the first satellite;
the I-UPF of the third satellite sends the fifth message to the second terminal;
the first terminal sends a sixth message to the I-UPF of the first satellite, and based on the third routing information, the I-UPF of the first satellite directly sends the sixth message to the I-UPF of the third satellite;
and the I-UPF of the third satellite sends the sixth message to the second terminal.
A low-orbit satellite system message delay reducing system according to an embodiment of the second aspect of the present invention is configured to execute the method for reducing a message delay of a low-orbit satellite system according to any one of the embodiments of the first aspect of the present invention, and includes:
the plurality of terminals at least comprises a first terminal and a second terminal;
a plurality of satellites, each of which is in communication connection with a plurality of terminals, the plurality of satellites including at least a first satellite, a second satellite, and a third satellite;
and the ground station is respectively connected with a plurality of satellites in communication.
The low-orbit satellite system for reducing the message delay system has at least the following beneficial effects:
by applying the method of the embodiment of the invention to the system of the embodiment of the invention, in the process of first sending the message to the second terminal by the first terminal, the UPF of the ground station is utilized to find out the first route information and feed back the first route information to the UPF of the first satellite where the first terminal is located, so that the UPF of the first satellite can directly transmit the message to the UPF of the second satellite based on the first route information when the subsequent first terminal sends the message to the second terminal each time, thereby realizing the transmission of the message only between satellites during terminal interaction, and further reducing the processing of forwarding through the ground station. Therefore, by utilizing the system of the embodiment of the invention, the transmission delay of the low-orbit satellite system can be reduced by at least 50%, and the use of satellite-ground link resources is reduced.
A low-orbit satellite system message delay reducing device according to an embodiment of the third aspect of the present invention comprises at least one control processor and a memory for communication connection with the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform a low-orbit satellite system message latency reduction method according to any of the embodiments of the first aspect of the present invention.
According to a fourth aspect of the present invention, there is provided a computer-readable storage medium storing computer-executable instructions for causing a computer to perform a method for reducing message latency in a low-earth-orbit satellite system according to the first aspect of the present invention.
It is to be understood that the advantages of the third aspect and the fourth aspect compared with the related art are the same as those of the first aspect compared with the related art, and reference may be made to the related description in the first aspect, which is not repeated herein.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart showing the steps of a method for reducing message latency in a low-orbit satellite system according to one embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for reducing message delay in a low-orbit satellite system according to an embodiment of the invention;
FIG. 3 is a schematic flow chart of a method for reducing message delay in a low-orbit satellite system according to another embodiment of the invention;
fig. 4 is a schematic diagram of a low-orbit satellite system message latency reduction system according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, the description of first, second, etc. is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be determined reasonably by a person skilled in the art in combination with the specific content of the technical solution.
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings, in which it is apparent that the embodiments described below are some, but not all embodiments of the invention.
Referring to fig. 1, a method for reducing message delay in a low-orbit satellite system according to an embodiment of the present invention includes the following steps:
the first terminal and the second terminal access the network and establish PDU conversation, and apply for the I-UPF resource of the first satellite and the I-UPF resource of the second satellite respectively;
the first terminal sends a first message to the I-UPF of the first satellite, and the I-UPF of the first satellite sends the first message to the UPF of the affiliated ground station;
based on the address of the second terminal, the UPF of the ground station searches the I-UPF of a second satellite where the second terminal is located so as to obtain first routing information;
the UPF of the ground station sends a first message to the I-UPF of the second satellite, and feeds back the first route information to the I-UPF of the first satellite;
the I-UPF of the second satellite sends a first message to the second terminal;
the first terminal sends a second message to the I-UPF of the first satellite, and based on the first route information, the I-UPF of the first satellite directly sends the second message to the I-UPF of the second satellite;
the I-UPF of the second satellite sends a second message to the second terminal.
As shown in fig. 1, specifically, it should be noted that the method of the embodiment of the present invention is applied to a 5G core network, where PDU (Protocol Data Unit) is an information protocol data unit exchanged between peer layers by a protocol of a protocol layer. And a PDU session refers to a process of communication between a UE and the data network DN (Data Network), and after the PDU session is established, a data transmission channel between the UE and the DN is established. The PDU session information includes related information such as a number, IMSI, IMEI, PDU session ID, session type (lPv, IPv6, IPv4v6, ethenet, unstructured), uplink and downlink rate charging ID, roaming status information, IP information of UE, PCF information, qos information, tunnel information, destination address, SMF identification, slice information (if supported), default DRB information, data network name, AMF information, user location information, session management information, UPF ID, online charging identification, offline charging identification, and the like. Therefore, in the 5G core network, the terminal initiates an application for establishing a PDU session when there is a service demand.
Further, UPF (User Plane Function) refers to a user plane function, which is an important component of the 3gpp 5G core network system architecture and is mainly responsible for the functions related to routing and forwarding of the 5G core network user plane data packets. UPF plays a significant role in 5G edge computing and network slicing technology for low latency and large bandwidth. The UPF is used as a 5GC network user plane element and mainly supports the routing and forwarding of UE service data, the data and service identification, the action and policy execution and the like. The UPF interacts with session management functions (SMF, session Management Function) through the N4 interface, directly accepts SMF control and management, and performs processing of traffic flows according to various policies issued by the SMF.
Further, the UPF main functions include: an interconnection point between the wireless access network and the data network DN for encapsulation and decapsulation of GTP tunnel protocols (gtp_u, GPRS Tunneling Protocol for User Plane) of the user plane; a protocol data unit Session Anchor (PSA) for providing mobility upon wireless access; the routing and local splitting of the 5G SA packet serves as a relay UPF (I-UPF) acting as an upstream classifier (UL-CL, uplink Classifier) or a branching node UPF (Branching Point UPF); in addition, UPF has functions of application monitoring, data flow QoS handling, flow usage reporting, IP management, mobility adaptation, policy control, and charging. It can be understood that in the embodiment of the present invention, the UPF adopted by the satellites is an I-UPF, i.e. a relay UPF, and the UPF adopted by the ground station is a PSA-UPF, i.e. an anchor UPF.
Specifically, referring to fig. 2 in combination, first, on the basis of a defined network architecture of the 3gpp 38821 protocol, an inserted I-UPF manner is used in PDU session establishment, while the I-UPF is deployed on a satellite. Then, for the scenes of the UE1 and the UE2 under different satellites, when the UE1 sends the message to the UE2, the method can be used for directly connecting the inter-satellite I-UPF message, and reduces the forwarding processing through the ground PSA-UPF.
In this embodiment, in the process of first sending a message from a first terminal to a second terminal, the UPF of the ground station is used to find out first routing information and feed back the first routing information to the UPF of the first satellite where the first terminal is located, so that when the subsequent first terminal sends the message to the second terminal each time, the UPF of the first satellite can directly transmit the message to the UPF of the second satellite based on the first routing information, thereby realizing that the message is only transmitted between satellites when the terminals interact, and reducing the processing of forwarding through the ground station. Therefore, by utilizing the method of the embodiment of the invention, the transmission delay of the low-orbit satellite system can be reduced by at least 50%, and the use of satellite-ground link resources is reduced.
In some embodiments, the method for reducing message latency in a low-orbit satellite system further comprises the steps of:
the second terminal sends a third message to the I-UPF of the second satellite, and the I-UPF of the second satellite sends the third message to the UPF of the affiliated ground station;
based on the address of the first terminal, the UPF of the ground station searches the I-UPF of the first satellite where the first terminal is located so as to obtain second routing information;
the UPF of the ground station sends a third message to the I-UPF of the first satellite and feeds back second routing information to the I-UPF of the second satellite;
the I-UPF of the first satellite sends a third message to the first terminal;
the second terminal sends a fourth message to the I-UPF of the second satellite, and based on the second routing information, the I-UPF of the second satellite directly sends the fourth message to the I-UPF of the first satellite;
the I-UPF of the first satellite sends a fourth message to the first terminal.
Specifically, referring to fig. 2 in combination, it may be understood that, on the basis that the UE1 sends a message to the UE2 may be implemented through an inter-satellite I-UPF message Wen Zhi, correspondingly, the embodiment of the present invention further implements that the UE2 sends a message to the UE1 may be implemented through an inter-satellite I-UPF message. Therefore, the effect of complete direct connection when the terminals send messages to each other is finally realized, and the use of satellite-ground link resources is greatly reduced.
In some embodiments, when the satellite in which the second terminal is located is changed from the second satellite to the third satellite, the method for reducing the message delay of the low-orbit satellite system further comprises the following steps:
the first terminal sends a fifth message to the I-UPF of the first satellite;
based on the first route information, the I-UPF of the first satellite sends a fifth message to the I-UPF of the second satellite, the second terminal fails to receive the fifth message, and the I-UPF of the first satellite sends the fifth message to the UPF of the affiliated ground station;
updating the UPF of the ground station to find the I-UPF of a third satellite where the second terminal is located so as to obtain third routing information;
the UPF of the ground station sends a fifth message to the I-UPF of the third satellite and feeds back the third route information to the I-UPF of the first satellite;
the I-UPF of the third satellite sends a fifth message to the second terminal;
the first terminal sends a sixth message to the I-UPF of the first satellite, and based on the third routing information, the I-UPF of the first satellite directly sends the sixth message to the I-UPF of the third satellite;
and the I-UPF of the third satellite sends a sixth message to the second terminal.
In particular, referring to fig. 3, it can be appreciated that the satellite in which the terminal is located is not fixed and may be affected by weather, distance, satellite failure, etc., such that the terminal may establish contact with different satellites under different conditions. Therefore, after the method of the embodiment of the invention is utilized to realize the direct intercommunication of the message transmission between the UE1 and the UE2, once the satellite connected with any terminal changes, the message can not be directly communicated between the UE1 and the UE2. Therefore, in this embodiment, the destination address is found again by using the ground station UPF, so that the routing information is updated, and the through-message link between the UE1 and the UE2 can be re-established finally.
It should be noted that, the embodiment of the present invention is only represented by the first terminal, the second terminal, the first satellite, the second satellite, and the third satellite as an explanation of the method of the present embodiment, and the method of the embodiment of the present invention may be applied to links formed by a plurality of terminals, a plurality of satellites, and a site station, and implementation of the method of the embodiment of the present invention is not limited to the first terminal, the second terminal, the first satellite, the second satellite, and the third satellite.
In addition, the embodiment of the invention also provides a low-orbit satellite system message delay reducing system, which is used for executing the method for reducing the message delay of the low-orbit satellite system according to the embodiment of the first aspect of the invention, and comprises the following steps: a plurality of terminals, a plurality of satellites, a ground station. The plurality of terminals at least comprises a first terminal and a second terminal; the plurality of satellites are respectively in communication connection with the plurality of terminals, and at least comprise a first satellite, a second satellite and a third satellite; the ground stations are each communicatively coupled to a plurality of satellites.
In particular, referring to fig. 4, it may be understood that the system of the embodiment shown in the figure selects only the first terminal, the second terminal, the first satellite, and the second satellite from the plurality of terminals and the plurality of satellites as examples to perform the method of the embodiment of the present invention. As can be seen from fig. 4, each satellite has at least the functions of RAN and I-UPF, where RAN (Radio Access Network) refers to the radio access network. Whereas for a ground station it has at least the functionality of AMF, SMF, UPF, UDM, where AMF refers to access and mobility management functions; SMF refers to session management function; UDM refers to a unified data management function.
In this embodiment, by applying the method of the embodiment of the present invention to the system of the embodiment of the present invention, in the process of first sending a message from a first terminal to a second terminal, the UPF of the ground station is used to find out first routing information and feed back the first routing information to the UPF of the first satellite where the first terminal is located, so that when the subsequent first terminal sends a message to the second terminal each time, the UPF of the first satellite can directly transmit the message to the UPF of the second satellite based on the first routing information, thereby implementing that the message is only transmitted between satellites during terminal interaction, and reducing the processing of forwarding through the ground station. Therefore, by utilizing the system of the embodiment of the invention, the transmission delay of the low-orbit satellite system can be reduced by at least 50%, and the use of satellite-ground link resources is reduced.
In addition, the embodiment of the invention also provides a device for reducing message delay of the low-orbit satellite system, which comprises the following steps: at least one control processor and a memory for communication connection with the at least one control processor.
The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
A non-transitory software program and instructions required to implement a method for reducing message latency in a low-orbit satellite system according to the above embodiments are stored in a memory, and when executed by a processor, perform a method for reducing message latency in a low-orbit satellite system according to the above embodiments, for example, perform the method of fig. 1 described above.
Embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions that are executed by one or more control processors to cause the one or more control processors to perform the method for reducing message latency in a low-earth-orbit satellite system in the method embodiment described above, for example, to perform the method described above in fig. 1.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (6)

1. The method for reducing message delay of the low-orbit satellite system is characterized by comprising the following steps of:
the first terminal and the second terminal access the network and establish PDU conversation, and apply for the I-UPF resource of the first satellite and the I-UPF resource of the second satellite respectively;
the first terminal sends a first message to the I-UPF of the first satellite, and the I-UPF of the first satellite sends the first message to the UPF of the affiliated ground station;
based on the address of the second terminal, the UPF of the ground station searches the I-UPF of the second satellite where the second terminal is located so as to obtain first routing information;
the UPF of the ground station sends the first message to the I-UPF of the second satellite and feeds back the first route information to the I-UPF of the first satellite;
the I-UPF of the second satellite sends the first message to the second terminal;
the first terminal sends a second message to the I-UPF of the first satellite, and based on the first route information, the I-UPF of the first satellite directly sends the second message to the I-UPF of the second satellite;
and the I-UPF of the second satellite sends the second message to the second terminal.
2. The method for reducing message latency in a low-orbit satellite system according to claim 1, further comprising the steps of:
the second terminal sends a third message to the I-UPF of the second satellite, and the I-UPF of the second satellite sends the third message to the UPF of the affiliated ground station;
based on the address of the first terminal, the UPF of the ground station searches the I-UPF of the first satellite where the first terminal is located so as to obtain second routing information;
the UPF of the ground station sends the third message to the I-UPF of the first satellite and feeds back the second routing information to the I-UPF of the second satellite;
the I-UPF of the first satellite sends the third message to the first terminal;
the second terminal sends a fourth message to the I-UPF of the second satellite, and based on the second routing information, the I-UPF of the second satellite directly sends the fourth message to the I-UPF of the first satellite;
and the I-UPF of the first satellite sends the fourth message to the first terminal.
3. The method for reducing message latency in a low-orbit satellite system according to claim 2, wherein when the satellite in which the second terminal is located is changed from the second satellite to a third satellite, the method for reducing message latency in a low-orbit satellite system further comprises the steps of:
the first terminal sends a fifth message to the I-UPF of the first satellite;
based on the first routing information, the I-UPF of the first satellite sends the fifth message to the I-UPF of the second satellite, the second terminal fails to receive the fifth message, and the I-UPF of the first satellite sends the fifth message to the UPF of the affiliated ground station;
the UPF of the ground station updates and searches the I-UPF of the third satellite where the second terminal is located so as to obtain third routing information;
the UPF of the ground station sends the fifth message to the I-UPF of the third satellite and feeds back the third route information to the I-UPF of the first satellite;
the I-UPF of the third satellite sends the fifth message to the second terminal;
the first terminal sends a sixth message to the I-UPF of the first satellite, and based on the third routing information, the I-UPF of the first satellite directly sends the sixth message to the I-UPF of the third satellite;
and the I-UPF of the third satellite sends the sixth message to the second terminal.
4. A low-orbit satellite system message latency reduction system for performing the low-orbit satellite system message latency reduction method according to any one of claims 1 to 3, comprising:
the plurality of terminals at least comprises a first terminal and a second terminal;
a plurality of satellites, each of which is in communication connection with a plurality of terminals, the plurality of satellites including at least a first satellite, a second satellite, and a third satellite;
and the ground station is respectively connected with a plurality of satellites in communication.
5. A low-orbit satellite system message delay reducing device, comprising at least one control processor and a memory for communication connection with the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the low-orbit satellite system reduced message latency method according to any one of claims 1 to 3.
6. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the low-orbit satellite system message latency reduction method according to any one of claims 1 to 3.
CN202311781457.6A 2023-12-22 2023-12-22 Method, system, equipment and medium for reducing message delay of low-orbit satellite system Pending CN117833981A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311781457.6A CN117833981A (en) 2023-12-22 2023-12-22 Method, system, equipment and medium for reducing message delay of low-orbit satellite system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311781457.6A CN117833981A (en) 2023-12-22 2023-12-22 Method, system, equipment and medium for reducing message delay of low-orbit satellite system

Publications (1)

Publication Number Publication Date
CN117833981A true CN117833981A (en) 2024-04-05

Family

ID=90503782

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311781457.6A Pending CN117833981A (en) 2023-12-22 2023-12-22 Method, system, equipment and medium for reducing message delay of low-orbit satellite system

Country Status (1)

Country Link
CN (1) CN117833981A (en)

Similar Documents

Publication Publication Date Title
US11510131B2 (en) Configuration method, data transmission method, and apparatus
US11212867B2 (en) Method and apparatus for transmitting and receiving data in wireless communication system
US11848744B2 (en) Non-access stratum connection handling for wireless devices
US20210329487A1 (en) Data transmission method and apparatus, and service switching method and apparatus
CN105409319B (en) Contention-based integration of device-to-device (D2D for short) networks with wireless infrastructure
EP3637846B1 (en) Method and device for use in configuring novel quality of service architecture in dual connectivity system
US9622276B2 (en) Method and device for determining to establish multi-protocol label switching traffic engineering tunnel
CN113225836B (en) Communication method, system, device and storage medium for low earth orbit satellite and 5G core network
RU2563841C2 (en) Identification of relay centres in communication network
WO2017215401A1 (en) Message processing method and device
US11968565B2 (en) User plane information reporting method and apparatus
KR20190008983A (en) METHOD AND APPARATUS FOR PERFORMING REFLECTIVE SERVICE QUALITY (QoS) IN A WIRELESS COMMUNICATION SYSTEM
CN112584441B (en) Method and device for determining NAS connection attribute of terminal, AMF, terminal and base station
EP4039061A1 (en) A method of and equipment for performing transfer of data packets in end-to-end multi-hop sidelink radio communication
CN115699816A (en) Method for sidelink relay communication under dual connectivity
EP2416530B1 (en) Method, network system and device for realizing data retransmission
US20220338295A1 (en) Sidelink bearer managing method and apparatus, terminal, and medium
CN103096507B (en) The method for building up of a kind of data channel and device
CN117833981A (en) Method, system, equipment and medium for reducing message delay of low-orbit satellite system
AU2018407956B2 (en) Mobile communication system, method and device
CN115669213A (en) Relay device selection method, device, equipment and storage medium
CN116232432B (en) Satellite communication method, relay user plane module and 5G core network system
CN115804238A (en) Multicast and broadcast service establishment
WO2022205326A1 (en) Integrated access and backhaul donor migration methods and systems
WO2024016323A1 (en) Method and apparatus for supporting mbs in an iab network

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination