RNC Node B MBMS Capability Audit Mechanism
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Solution Overview
Problem
Current 3GPP protocols do not allow Radio Network Controller (RNC) to obtain the MBMS supporting ability of a cell before attempting to set up MICH and FACH channels, leading to unreliable configuration and increased system maintenance complexity.
Innovation Solution
RNC transmits an audit request message to Node B, which returns an audit response message containing MBMS supporting ability information, and Node B reports changes in this ability, enabling RNC to obtain real-time and accurate information through periodic audits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RNC attempts to set up MICH and FACH channels without knowing the MBMS supporting ability of the cell, then the configuration process can proceed, but the setup may fail and system maintenance complexity increases
Solution Approach 1:
The patent applies preliminary action by having Node B report its MBMS supporting ability to RNC before RNC attempts to set up MICH and FACH channels. The RNC receives this ability information in advance through a specific message interface, allowing it to make informed decisions about channel setup. This prevents unnecessary setup attempts and configuration failures, directly resolving the contradiction between configuration speed and reliability.
2Loss of information
If RNC obtains MBMS supporting ability information through trial setup and failure detection, then information can be obtained, but time is wasted and maintenance complexity increases
Solution Approach 1:
The patent eliminates time waste by implementing preliminary reporting of MBMS supporting ability. Node B proactively sends its capability information to RNC before any channel setup attempts. This allows RNC to immediately know whether the cell supports MBMS without needing to perform trial setups or detect failures, thus acquiring information instantly without time loss.
Solution Approach 2:
The patent implements feedback mechanism where Node B continuously reports its MBMS supporting ability status to RNC. This feedback loop ensures RNC always has current information about the cell's MBMS capability, eliminating the need for trial-and-error detection and reducing both information acquisition time and maintenance complexity.
3Measurement precision
If RNC performs periodic audits to obtain real-time MBMS supporting ability information, then information accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies dynamics by making the audit mechanism adaptive rather than fixed. RNC performs periodic audits at dynamically adjusted intervals based on the stability of the MBMS supporting ability information. When the network state is stable, audit frequency is reduced; when changes are detected or suspected, audit frequency increases. This dynamic approach maintains high information accuracy while minimizing unnecessary signaling overhead.
Data Source
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AI summary
A method for obtaining the MBMS supporting ability of a cell is disclosed. The method concludes: step 1 in which RNC transmits an audit request message to Node B; step 2, the Node B returns an audit response message containing the MBMS supporting ability information of the cell to the RNC. With the present invention, the RNC can obtain the MBMS supporting ability information of the cell, and obtain the MBMS supporting ability changing information of the cell in real time and correctly.