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CN-122001441-A - IMS data transmission method, system, SMF, UPF and storage medium

CN122001441ACN 122001441 ACN122001441 ACN 122001441ACN-122001441-A

Abstract

The disclosure relates to a transmission method, a system, SMF, UPF and a storage medium of IMS data, and relates to the technical field of satellite communication. The transmission method of the IMS data of the IP multimedia system is executed by a session management function SMF, and comprises the steps of sending a first message to a first user plane function UPF, wherein the first message comprises a processing rule executed by the first UPF on IMS data related to first user equipment UE, and the processing rule comprises a rule for realizing user equipment-satellite-user equipment USU communication between the first UE and second UE by replacing a destination address in the IMS data.

Inventors

  • QI WEN
  • NIE HENG
  • WANG HENG
  • ZONG JIAYING

Assignees

  • 中国电信股份有限公司技术创新中心
  • 中国电信股份有限公司

Dates

Publication Date
20260508
Application Date
20241108

Claims (20)

  1. 1. A transmission method of IMS data of an IP multimedia system is executed by a session management function SMF, and comprises the following steps: And sending a first message to a first user plane function UPF, wherein the first message comprises processing rules which are executed by the first UPF on IMS data related to a first user equipment UE, and the processing rules comprise rules for realizing user equipment-satellite-user equipment USU communication between the first UE and a second UE by replacing a destination address in the IMS data.
  2. 2. The transmission method according to claim 1, wherein, in case the first UPF is an uplink classifier UL CL UPF, the processing rule further comprises first indication information for indicating the first UPF to copy the IMS data.
  3. 3. The transmission method of claim 2, wherein the first indication information is further used to indicate that the first UPF copies the uplink IMS data related to the first UE, and then sends the uplink IMS data to a first access gateway AGW and a second UPF on the ground, where the second UPF is a UPF on the second UE side.
  4. 4. A transmission method according to claim 3, wherein the destination address in the upstream IMS data is initially configured as the address of the first AGW, the first indication information includes an address of the second UE, an address prefix of a terrestrial UPF, and an address prefix of a first packet data unit session anchor PSA UPF, the first indication information is used to instruct the first UPF to send a copy of the upstream IMS data to the terrestrial UPF based on the address prefix of the terrestrial UPF, to send the copy of the upstream IMS data to the first AGW through the terrestrial UPF, to replace the destination address of another copy of the upstream IMS data with the address of the second UE based on the address prefix of the first PSA UPF, and to send the other copy of the upstream IMS data to the first PSA UPF to the second UE through the first PSA UPF.
  5. 5. The transmission method of claim 2, wherein the first indication information is further used to instruct the first UPF to copy the downlink IMS data related to the first UE, and send the copied downlink IMS data to a first access gateway AGW and the first UE on the ground, respectively.
  6. 6. The transmission method according to claim 5, wherein the destination address in the downlink IMS data is initially configured as an address of a second AGW, the first indication information includes an address of the first UE, an address of the second AGW, and an address prefix of a ground UPF, and the first indication information is used to instruct the first UPF to replace the destination address in the copied downlink IMS data with the address of the first AGW, and send the downlink IMS data to the ground UPF based on the address prefix of the ground UPF, so that the downlink IMS data is sent to the first AGW through the ground UPF, and instruct the first UPF to replace the destination address in the copied downlink IMS data with the address of the first UE and send the downlink IMS data to the first UE in a case where the destination address in the other downlink IMS data is the address of the second AGW.
  7. 7. The transmission method according to claim 2, wherein the processing rule further comprises second indication information for instructing the first UPF to send the first UE-related control signaling to a first access gateway AGW on the ground.
  8. 8. The transmission method of claim 2, wherein the first indication information is used to configure a traffic filter of the first UPF.
  9. 9. The transmission method according to claim 1, wherein, in case the first UPF is a packet data unit session anchor PSA UPF, the processing rule includes third indication information for indicating that the first UPF replaces the address of the first AGW with the address of the second UE in case the destination address in the upstream IMS data related to the first UE is the address of the first access gateway AGW on the ground.
  10. 10. The transmission method of claim 9, wherein the third indication information includes tunnel information of the first PSA UPF to a second PSA UPF, an address of the second UE, and the third indication information is used to indicate the uplink IMS data after the address is replaced by the first UPF, and is sent to the second PSA UPF based on the tunnel information, so that the second PSAUPF is sent to the second UE.
  11. 11. The transmission method according to claim 1, wherein, in a case where the first UPF is a packet data unit session anchor PSA UPF, the processing rule includes fourth indication information, configured to indicate that, in a case where a destination address in the downlink IMS data related to the first UE is an address of a second access gateway AGW on the ground, the first UPF replaces the address of the second AGW with the address of the first UE, where the second AGW is an AGW on the second UE side.
  12. 12. The transmission method of claim 11, wherein the fourth indication information includes an address of the first UE, an address of the second AGW, and the fourth indication information is used to instruct the first UPF to send the downlink IMS data with the address replaced to a first uplink classifier UL CL UPF for sending to the first UE through the first UL CL UPF.
  13. 13. The transmission method according to any of claims 1-12, wherein the IMS data comprises real time transport protocol RTP information, real time transport control protocol RTCP information.
  14. 14. The transmission method according to any one of claims 1-12, further comprising: And receiving a second message sent by a proxy call session control function (P-CSCF), wherein the second message comprises the address of the second UE, the address of the first AGW and the address of the second AGW.
  15. 15. The transmission method of claim 14, wherein the second message is a session initiation protocol SIP message.
  16. 16. The transmission method according to any one of claims 1-12, further comprising: receiving a third message sent by a proxy call session control function (P-CSCF), wherein the third message comprises fifth indication information for indicating the first UE and the second UE to execute the USU communication; And establishing an N4 session with the first UPF according to the fifth indication information.
  17. 17. A transmission method of IMS data of an IP multimedia system, performed by a user plane function UPF, wherein the UPF is used as a first UPF, the transmission method comprising: Receiving a first message sent by a Session Management Function (SMF), wherein the first message comprises processing rules executed by the first UPF on IMS data related to a first User Equipment (UE), and the processing rules comprise rules for realizing user equipment-satellite-user equipment (USU) communication between the first UE and a second UE by replacing a destination address in the IMS data; and processing the IMS data according to the processing rule.
  18. 18. The transmission method of claim 17, wherein the first UPF is configured as an uplink classifier UL CL UPF, the processing rule further comprises first indication information for indicating that the first UPF replicates the IMS data, and the processing the IMS data according to the processing rule comprises: And copying the IMS data according to the first indication information.
  19. 19. The transmission method of claim 18, wherein the first indication information is further used to indicate that the first UPF copies the uplink IMS data related to the first UE, and then sends the uplink IMS data to a first access gateway AGW and a second UPF on the ground, where the second UPF is a UPF of the second UE, and the processing the IMS data according to the processing rule further includes: And copying the uplink IMS data related to the first UE according to the first indication information, and then respectively sending the copied uplink IMS data to a first access gateway AGW and a second UPF on the ground.
  20. 20. The transmission method of claim 18, wherein the destination address in the uplink IMS data is initially configured as the address of the first AGW, the first indication information includes an address of the second UE, an address prefix of a terrestrial UPF, and an address prefix of a first packet data unit session anchor PSA UPF, and the copying the uplink IMS data related to the first UE according to the first indication information, and then sending the copied uplink IMS data to the first access gateway AGW and the second UPF on the ground respectively includes: Transmitting the copied piece of IMS data to the ground UPF based on the address prefix of the ground UPF so as to transmit the piece of IMS data to the first AGW through the ground UPF; And replacing the destination address of the copied another piece of IMS data with the address of the second UE, and transmitting the another piece of IMS data to the first PSA UPF based on the address prefix of the first PSA UPF so as to be transmitted to the second UE through the first PSA UPF.

Description

IMS data transmission method, system, SMF, UPF and storage medium Technical Field The disclosure relates to the technical field of satellite communication, and in particular relates to a transmission method, a system, an SMF (session initiation function), a UPF (unified packet transfer function) and a storage medium of IMS (IP multimedia subsystem) data. Background The convergence of the terrestrial base station with the satellite in the regeneration mode may provide a range of value added services to the terminal (or user equipment, UE). In particular, user equipment-Satellite-user equipment (USU) communication traffic that allows for on-board communication between UEs without going through a terrestrial network, under the coverage of one or more service satellites. The service can effectively eliminate the dependence on the ground gateway station, reduce the time delay of the user plane and provide a potential service scene for the space and the ground in the future. Disclosure of Invention The inventors have found that there is no relevant provision in the 3GPP (3 rd Generation Partnership Project, third generation partnership project) standard for USU communication, in particular, how to implement the USU communication via a UPF, which requires the deployment of UPF (User Plane Function ) on a satellite. One technical problem to be solved by the present disclosure is to propose a method for configuring a UPF to implement USU communication. According to some embodiments of the present disclosure, a method for transmitting IMS data of an IP multimedia system is provided, which is performed by a session management function SMF, and includes sending a first message to a first user plane function UPF, where the first message includes a processing rule that the first UPF performs on IMS data related to a first user equipment UE, and the processing rule includes a rule for implementing user equipment-satellite-user equipment USU communication between the first UE and a second UE by replacing a destination address in the IMS data. In some embodiments, in case the first UPF is an uplink classifier UL CL UPF, the processing rules further comprise first indication information for indicating that the first UPF duplicates the IMS data. In some embodiments, the first indication information is further used to instruct the first UPF to copy uplink IMS data related to the first UE, and then send the uplink IMS data to the first access gateway AGW and the second UPF on the ground, where the second UPF is a UPF on the second UE side. In some embodiments, the destination address in the upstream IMS data is initially configured as an address of the first AGW, the first indication information includes an address of the second UE, an address prefix of the terrestrial UPF, and an address prefix of the first packet data unit session anchor PSA UPF, the first indication information is used to indicate that the first UPF sends a copy of the upstream IMS data to the terrestrial UPF based on the address prefix of the terrestrial UPF, sends a copy of the upstream IMS data to the first AGW via the terrestrial UPF, replaces the destination address of the copy of the other copy of the upstream IMS data with the address of the second UE, and sends the other copy of the upstream IMS data to the first PSA UPF based on the address prefix of the first PSA UPF, so as to send the copy to the second UE via the first PSA UPF. In some embodiments, the first indication information is further used to instruct the first UPF to copy the downlink IMS data related to the first UE, and then send the copied downlink IMS data to the first access gateway AGW and the first UE on the ground, respectively. In some embodiments, the destination address in the downlink IMS data is initially configured as the address of the second AGW, the first indication information includes an address of the first UE, an address of the second AGW, and an address prefix of the ground UPF, the first indication information is used to instruct the first UPF to replace the destination address in the copied one piece of downlink IMS data with the address of the first AGW, and send the one piece of downlink IMS data to the ground UPF based on the address prefix of the ground UPF, so that the one piece of downlink IMS data is sent to the first AGW through the ground UPF, instruct the first UPF to replace the destination address in the copied other piece of downlink IMS data with the address of the first UE in case that the destination address in the other piece of downlink IMS data is the address of the second AGW, and send the other piece of downlink IMS data to the first UE. In some embodiments, the processing rules further comprise second indication information for instructing the first UPF to send the first UE-related control signaling to the first access gateway AGW on the ground. In some embodiments, the first indication information is used to configure a traffic filter of the