Base Station RRC Re-establishment Context Retrieval
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Solution Overview
Problem
In NB-IoT control plane scenarios, the process of re-establishing an RRC link is prolonged due to the need for the base station to specially obtain context information of the UE from the MME, adding extra steps and time to the RRC connection re-establishment process.
Innovation Solution
The method involves sending a first request from the base station to the MME that includes a request to re-establish an RRC connection, allowing the MME to send context information and indication information, enabling the base station to obtain the necessary UE context without additional dedicated information, thereby reducing the steps in the RRC link re-establishment process and shortening the re-establishment time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station sends a dedicated request to obtain UE context information from the MME during RRC link re-establishment, then the base station can acquire the necessary context information, but the number of steps in the re-establishment process increases and the re-establishment time is prolonged
Solution Approach 1:
The patent combines the UE context information retrieval process with the existing RRC re-establishment signaling flow. Instead of adding a separate dedicated request-exchange between the base station and MME, the context information is obtained by merging the retrieval operation into the existing re-establishment procedure, thereby reducing the total number of steps while ensuring reliable acquisition of necessary UE context information
Solution Approach 2:
The patent applies preliminary action by having the base station obtain UE context information from the MME in advance or during the initial phases of the re-establishment process, rather than waiting for separate dedicated signaling. This allows the context information to be ready when needed, reducing the overall re-establishment time while maintaining reliability
2Reliability
If the base station adds dedicated steps to obtain UE context information from the MME, then the context information can be acquired, but the complexity of the re-establishment process increases
Solution Approach 1:
The patent merges the UE context information retrieval operation with the existing RRC re-establishment signaling流程. By combining these operations into a unified process rather than treating them as separate steps, the patent reduces procedural complexity while ensuring that all necessary context information is reliably obtained for successful re-establishment
Data Source
AI summary
Embodiments of the present invention provides an information obtaining method and a device. The method is applied to a base station, and includes: sending first information to a mobile management entity (MME), where the first information includes a first request used to re-establish an radio resource control (RRC) connection, the first request is used to instruct the MME to send second information to the base station, the second information includes context information of user equipment (UE) and indication information that is used to indicate connection establishment, and the UE is a UE that requests the RRC connection re-establishment; and receiving the second information. In the embodiments of the present invention, steps in a process of RRC link re-establishment can be reduced, thereby shortening time for re-establishing an RRC connection.