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CN-122002420-A - Mobility management method and related equipment for non-ground network

CN122002420ACN 122002420 ACN122002420 ACN 122002420ACN-122002420-A

Abstract

The invention discloses a mobility management method and related equipment for a non-ground network, which comprise the steps of operating a ground core network and an anchor gateway, realizing communication connection between the anchor gateway and each communication satellite and between the anchor gateway and the ground core network, maintaining a global session mapping table through the anchor gateway, carrying out mobility management on a user terminal according to the global session mapping table, and the like. According to the invention, a mobility anchor point gateway is deployed at the boundary of the non-ground network and the ground core network, the anchor point gateway is used as a fixed logic anchor point of a user session, and the details of the physical switching of the bottom satellite of the user terminal can be shielded towards the ground core network side by maintaining a dynamic global session mapping table and executing intelligent data packet redirection, so that the burden of the connection switching of the communication satellite of the user terminal on the ground core network is reduced, and the burden of the switching of the user terminal on the non-ground network is also reduced. The invention is widely applied to the technical field of communication.

Inventors

  • WU WEIZHI

Assignees

  • 广州爱浦路网络技术有限公司

Dates

Publication Date
20260508
Application Date
20260121

Claims (10)

  1. 1. A mobility management method for a non-terrestrial network, the non-terrestrial network comprising a plurality of communication satellites, each of the communication satellites being for switchable communication connection by a user terminal, the mobility management method for a non-terrestrial network comprising: operating a ground core network and an anchor point gateway; realizing communication connection between the anchor point gateway and each communication satellite; Realizing communication connection between the anchor point gateway and a ground core network; And maintaining a global session mapping table through the anchor gateway, and performing mobility management on the user terminal according to the global session mapping table, wherein the global session mapping table comprises dynamic information and static information, the dynamic information represents session mapping relations between the user terminal and the communication satellite and between the communication satellite and the anchor gateway, and the static information represents session mapping relations between the user terminal and the anchor gateway and between the anchor gateway and the ground core network.
  2. 2. The mobility management method for a non-terrestrial network according to claim 1, wherein the maintaining a global session mapping table comprises: When the user terminal initiates a session establishment request through any communication satellite, receiving the session establishment request through the anchor gateway; Responding to the session establishment request, distributing a user anchoring IP address for the user terminal, establishing core network side tunnel information and user session context, and determining the user anchoring IP address, the core network side tunnel information and the user session context as the static information; And responding to the session establishment request, determining a current service satellite identifier corresponding to the user terminal, establishing satellite side tunnel information, and determining the current service satellite identifier and the satellite side tunnel information as the dynamic information.
  3. 3. The mobility management method for a non-terrestrial network according to claim 1, wherein the maintaining a global session mapping table comprises: Receiving switching completion notification information when the user terminal switches the connected communication satellite, wherein the switching completion notification information is sent out by the user terminal or the communication satellite connected after switching; And responding to the switching completion notification information, and updating the dynamic information.
  4. 4. A mobility management method for a non-terrestrial network according to claim 3, wherein the maintaining a global session mapping table further comprises: Predicting the switching of the user terminal before receiving the switching completion notification information, and determining a target satellite, wherein the target satellite is the communication satellite to be switched and connected by the user terminal; and establishing a user plane tunnel with the target satellite.
  5. 5. The mobility management method for a non-terrestrial network according to claim 1, wherein said performing mobility management on the user terminal according to the global session map comprises: The uplink data packet is sent out by the user terminal and is transmitted transparently through the communication satellite connected with the user terminal; and sending the uplink data packet to the ground core network according to the static information.
  6. 6. The mobility management method for a non-terrestrial network according to claim 1, wherein said performing mobility management on the user terminal according to the global session map comprises: Acquiring a downlink data packet according to the static information, wherein the downlink data packet is sent out by the ground core network; and according to the dynamic information, the downlink data packet is sent to the communication satellite connected with the user terminal, and the communication satellite is triggered to forward to the user terminal.
  7. 7. A mobility management method for a non-terrestrial network according to any one of claims 1-6, wherein the running terrestrial core network and anchor gateway comprises: Operating at least one of the ground core networks; Decoupling at least one anchor gateway from at least one of the ground core networks when a first trigger condition is satisfied; the decoupled anchor point gateway is independent from any ground core network; and when the second trigger condition is met, coupling at least one anchor point gateway with the corresponding ground core network.
  8. 8. The mobility management method for a non-terrestrial network according to claim 7, wherein said enabling a communication connection between the anchor gateway and a terrestrial core network comprises: for the decoupled anchor gateway, establishing one-to-many connection of the anchor gateway with each of the ground core networks; for the anchor gateway being coupled, a one-to-one connection of the anchor gateway with the ground core network being coupled is established.
  9. 9. A computer arrangement comprising a memory for storing at least one program and a processor for loading the at least one program to perform the mobility management method for a non-terrestrial network according to any of claims 1-8.
  10. 10. A computer readable storage medium, in which a processor executable program is stored, characterized in that the processor executable program when being executed by a processor is for performing the mobility management method for a non-terrestrial network according to any of claims 1-8.

Description

Mobility management method and related equipment for non-ground network Technical Field The invention relates to the technical field of communication, in particular to a mobility management method and related equipment for a non-ground network. Background With the large-scale deployment of low-orbit satellite constellations, satellite networks (non-terrestrial networks, NTNs) have become a core component of 6G heaven-earth integrated networks. In low orbit satellite networks, satellites move at high speeds relative to the ground (e.g., about 90 minutes of orbit period), resulting in ground User Equipment (UE) having to frequently handoff the connected satellites. Such frequent switching presents a serious challenge to the conventional mobility management technology, for example, if switching is too frequent, an excessive burden is caused to key network facilities such as a non-terrestrial network and a terrestrial core network, so that the overall efficiency of the communication network is affected, and adverse phenomena such as connection interruption caused by the change of an IP address are also easy to occur to the user terminal. How to network facility efficiency, keep user service continuity, avoid connection interruption and other phenomena becomes a key technical problem in the satellite communication field. Disclosure of Invention In view of at least one of the above-mentioned technical problems, an object of the present invention is to provide a mobility management method and related device for a non-terrestrial network. In one aspect, an embodiment of the present invention includes a mobility management method for a non-terrestrial network including a plurality of communication satellites, each of the communication satellites being configured to be switchably connected in communication by a user terminal, the mobility management method for a non-terrestrial network including: operating a ground core network and an anchor point gateway; realizing communication connection between the anchor point gateway and each communication satellite; Realizing communication connection between the anchor point gateway and a ground core network; And maintaining a global session mapping table through the anchor gateway, and performing mobility management on the user terminal according to the global session mapping table, wherein the global session mapping table comprises dynamic information and static information, the dynamic information represents session mapping relations between the user terminal and the communication satellite and between the communication satellite and the anchor gateway, and the static information represents session mapping relations between the user terminal and the anchor gateway and between the anchor gateway and the ground core network. Further, the maintaining the global session mapping table includes: When the user terminal initiates a session establishment request through any communication satellite, receiving the session establishment request through the anchor gateway; Responding to the session establishment request, distributing a user anchoring IP address for the user terminal, establishing core network side tunnel information and user session context, and determining the user anchoring IP address, the core network side tunnel information and the user session context as the static information; And responding to the session establishment request, determining a current service satellite identifier corresponding to the user terminal, establishing satellite side tunnel information, and determining the current service satellite identifier and the satellite side tunnel information as the dynamic information. Further, the maintaining the global session mapping table includes: Receiving switching completion notification information when the user terminal switches the connected communication satellite, wherein the switching completion notification information is sent out by the user terminal or the communication satellite connected after switching; And responding to the switching completion notification information, and updating the dynamic information. Further, the maintaining the global session mapping table further includes: Predicting the switching of the user terminal before receiving the switching completion notification information, and determining a target satellite, wherein the target satellite is the communication satellite to be switched and connected by the user terminal; and establishing a user plane tunnel with the target satellite. Further, the performing mobility management on the ue according to the global session mapping table includes: The uplink data packet is sent out by the user terminal and is transmitted transparently through the communication satellite connected with the user terminal; and sending the uplink data packet to the ground core network according to the static information. Further, the performing mobility management on the ue according to the global sessi