Serving Gateway Bearer Update Timing Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the context of the System Architecture Evolution (SAE) of mobile communication systems, the Serving Gateway (Serving GW) faces challenges in determining the optimal time to update bearers between itself and the Packet Data Network Gateway (PDN GW), potentially leading to bearers being updated too early or too late during tracking area updates or handovers.
Innovation Solution
A method where the mobility management unit sends a bearer establishing request message with a bearer update indication to the Serving GW, specifying whether the bearer should be updated immediately or later, allowing the Serving GW to determine the appropriate timing for updating the bearer based on this indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the Serving GW updates the bearer immediately upon receiving the bearer establishing request message, then the bearer update speed is improved, but the network management accuracy deteriorates due to premature updates
Solution Approach 1:
The mobility management unit performs preliminary action by including the bearer update indication in the bearer establishing request message before the Serving GW executes the bearer update. This allows the Serving GW to know in advance whether to update immediately or later, preventing premature updates while maintaining efficient timing.
2Measurement precision
If the Serving GW waits to update the bearer until acquiring eNodeB address and TEID, then the network management accuracy is improved, but the bearer update delay increases
Solution Approach 1:
The solution makes the bearer update timing dynamic by introducing the bearer update indication parameter that can take different values (immediate or later). This allows the system to adapt the update timing to specific scenarios: immediate updates when speed is critical, or delayed updates when accuracy is more important, thus resolving the contradiction between speed and timing accuracy.
3Device complexity
If the Serving GW uses fixed bearer update timing rules, then the system complexity is reduced, but the adaptability to different mobility scenarios deteriorates
Solution Approach 1:
The invention changes the parameter of bearer update timing from a fixed rule to a configurable parameter (bearer update indication). This simple parameter change allows the system to adapt to different mobility scenarios (TAU vs. handover) without increasing overall system complexity, as the parameter is transmitted through existing signaling messages.
Data Source
AI summary
The present invention provides a method for indicating a serving gateway to update the bearer, comprising: a mobility management unit sending to a serving gateway a bearer establishing request message carrying a bearer update indication for indicating the serving gateway whether to update the bearer between the serving gateway and a packet data network gateway immediately; after receiving the bearer establishing request message, the serving gateway determining whether to update the bearer between the serving gateway and the packet data network gateway immediately according to the bearer update indication carried in the message. The method provided by the present invention can enable the serving gateway to easily judge when to update the bearer between the serving gateway and the packet data network gateway so as to avoid updating the bearer between the serving gateway and the packet data network gateway by the serving gateway too early or too late.