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US 2022/0191746 A1Published application
Wireless communication network handovers of wireless user equipment that execute low-latency applications
AssigneeT-Mobile Innovations LLC
InventorZheng Cai
Life of this patent
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Abstract
A source Centralized Unit (CU) serves User Equipment (UE) based on UE application context for a low-latency application in the UE. In the source CU, a source Application Server (AS) uses a source User Plane Function (UPF) to serve the low-latency application in the UE. In response to a handover to a target CU, the source CU indicates the source UPF to the target CU. The target AS in the target CU uses the source UPF ID to retrieve the UE application context for the UE from the source AS. In the target CU, a target AS serves the low-latency application based on the retrieved UE application context.
Claims20
A method of operating a wireless communication network to serve User Equipment (UE) that executes a low-latency application, the method comprising:
- a source Application Server (AS) exchanging initial data with a source User Plane Function (UPF) for the low-latency application in the UE based on UE application context wherein the UE application context characterizes the low-latency application with context data that comprises one or more of an application version, a session ID, a user ID, session pointers, and application session metadata;
- the source UPF exchanging the initial data with the source AS and exchanging the initial data with a source wireless access node;
- the source wireless access node exchanging the initial data with the source UPF and wirelessly exchanging the initial data with the UE;
- the source AS transferring intermediate data to the source UPF for the low-latency application in the UE based on the UE application context;
- the source UPF receiving the intermediate data and transferring the intermediate data to the source wireless access node;
- the source wireless access node receiving the intermediate data and transferring the intermediate data to a target wireless access node;
- the target wireless access node receiving the intermediate data from the source wireless access node, wirelessly transferring the intermediate data to the UE, and transferring a handover notice to a wireless network core;
- the wireless network core receiving the handover notice and transferring the handover notice to a target UPF;
- the target UPF receiving the handover notice from the wireless network core and transferring the handover notice to the target AS;
- the target AS receiving the handover notice from the target UPF and responsively retrieving the UE application context for the UE from the source AS;
- the target AS exchanging additional data with the target UPF for the low-latency application in the UE based on the retrieved UE application context;
- the target UPF exchanging the additional data with the source AF and exchanging additional data with the target wireless access node;
- and
- the target wireless access node exchanging the additional data with the target UPF and wirelessly exchanging the additional data with the UE.
11 more elements
A wireless communication network to serve User Equipment (UE) that executes a low-latency application, the wireless communication network comprising:
- a source Application Server (AS) configured to exchange initial data with a source User Plane Function (UPF) for the low-latency application in the UE based on UE application context wherein the UE application context characterizes the low-latency application with context data that comprises one or more of an application version, a session ID, a user ID, session pointers, and application session metadata;
- the source UPF configured to exchange the initial data with the source AS and exchanging the initial data with a source wireless access node;
- the source wireless access node configured to exchange the initial data with the source UPF and wirelessly exchanging the initial data with the UE;
- the source AS configured to transfer intermediate data to the source UPF for the low-latency application in the UE based on the UE application context;
- the source UPF configured to receive the intermediate data and transfer the intermediate data to the source wireless access node;
- the source wireless access node configured to receive the intermediate data and transfer the intermediate data to a target wireless access node;
- the target wireless access node configured to receive the intermediate data from the source wireless access node, wirelessly transfer the intermediate data to the UE, and transfer a handover notice to a wireless network core;
- the wireless network core configured to receive the handover notice and transferring the handover notice to a target UPF;
- the target UPF configured to receive the handover notice from the wireless network core and transfer the handover notice to the target AS;
- the target AS configured to receive the handover notice from the target UPF and responsively retrieve the UE application context for the UE from the source AS;
- the target AS configured to exchange additional data with the target UPF for the low-latency application in the UE based on the retrieved UE application context;
- the target UPF configured to exchange the additional data with the source AF and exchange additional data with the target wireless access node;
- and
- the target wireless access node configured to exchange the additional data with the target UPF and wirelessly exchange the additional data with the UE.
11 more elements
Dependencies are inferred from the claim text.