Base Station Connection Resume Support Indication
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Solution Overview
Problem
In the LTE system, User Equipment (UE) cannot determine if a selected base station supports the connection resume function, leading to potential failures in the connection resume procedure due to unknown support by both the base station and the Mobility Management Entity (MME).
Innovation Solution
The base station transmits system information indicating whether it supports the connection resume function, and determines MME support through specific messages, allowing the UE to initiate the resume procedure only when both support the function, thereby avoiding failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station does not transmit system information indicating support for connection resume function, then the signaling overhead is reduced, but the UE cannot determine whether the selected base station supports the resume procedure, causing failure in the connection resume procedure
Solution Approach 1:
The patent extracts the connection resume function support indication from the general system information blocks and places it in a dedicated field within the system information. This allows the UE to efficiently determine base station support for the resume procedure without requiring the UE to read and parse entire system information blocks, thus reducing information loss while maintaining reliability.
Solution Approach 2:
The base station transmits the connection resume function support indication in advance through system information before the UE attempts to resume a connection. This preliminary action allows the UE to determine whether to initiate the resume procedure, preventing failed resume attempts and improving overall procedure success rate.
2Reliability
If the UE reads all system information blocks to determine base station support for resume function, then the UE can accurately determine support status, but the power consumption increases
Solution Approach 1:
The patent extracts the connection resume function support indication into a specific, easily identifiable field within the system information structure. This allows the UE to quickly locate and read only the necessary indication bit rather than parsing entire system information blocks, significantly reducing power consumption while maintaining accurate determination of base station support status.
Solution Approach 2:
The UE performs partial reading of system information by only accessing the specific field indicating connection resume function support, rather than reading all system information blocks. This partial action approach provides sufficient information for the UE to make informed decisions about resume procedure initiation, reducing energy expenditure while maintaining determination accuracy.
3Reliability
If the base station and MME do not coordinate on connection resume function support, then the system complexity is reduced, but the connection resume procedure may fail due to mismatched support status
Solution Approach 1:
The patent implements a feedback mechanism where the base station determines MME support status and uses this information to control transmission of the connection resume function support indication. This feedback loop ensures that the indication is only transmitted when both the base station and MME support the connection resume function, maintaining consistency and reliability without requiring complex continuous coordination between the base station and MME.
Solution Approach 2:
The base station performs preliminary determination of MME support status before transmitting system information containing the connection resume function support indication. This preliminary action ensures that both the base station and MME are confirmed to support the function before the UE is informed, preventing procedure failures due to mismatched support status while avoiding ongoing coordination complexity.
Data Source
AI summary
Method for accessing cell and base station are provided. The method includes: transmitting system information indicating whether the cell supports connection resume function to a UE; after receiving an RRC connection resume request from the UE, acquiring a resume identification of the UE from the RRC connection resume request; looking up context information of the UE based on the resume identification, and transmitting an RRC connection resume acknowledgement message to the UE after finding the context information; after determining an MME supports connection resume function, transmitting a context information activation request including identification information of the UE to the MME; receiving a context information activation acknowledgement message from the MME, which is transmitted after the MME finds the context information of the UE according to the identification information; and transmitting a notification message indicating that a bearer is resumed to the UE. Failure in connection resume procedure is avoided.