UMTS Traffic Volume Measurement Validity Control
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Solution Overview
Problem
The inconsistency in the 3GPP 25.331 specification regarding the validity of traffic volume measurements in UMTS communications systems leads to ambiguous behavior in user equipment (UE) when transitioning between CELL_FACH and CELL_DCH states, causing conflicts in measurement reporting and updates.
Innovation Solution
A method and apparatus that set the validity element for traffic volume measurements to prevent the value 'CELL_DCH' when the UE is in the CELL_FACH state, ensuring unambiguous behavior by setting it to 'all states' or 'all states except CELL_DCH', and rejecting messages attempting to set 'CELL_DCH' validity, thereby maintaining consistent measurement reporting across state transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the validity element is set to 'CELL_DCH' when the UE is in CELL_FACH state, then the measurement can be activated for DCH state, but it creates ambiguous behavior and conflicts in measurement reporting during state transitions
Solution Approach 1:
The patent applies preliminary anti-action by preventing the invalid configuration before it can cause problems. The UE checks whether the validity element is set to 'CELL_DCH' when in CELL_FACH state, and if so, rejects the measurement control message with an error indication. This preemptive rejection prevents the ambiguous behavior and measurement reporting conflicts that would otherwise occur during state transitions.
2Stability of the object's composition
If the UE stores measurement control information in CELL_FACH state for later use in CELL_DCH state, then measurement setup is maintained across states, but it creates inconsistency with system information block updates
Solution Approach 1:
The patent implements feedback by having the UE verify the validity element configuration before accepting measurement control information. When the UE is in CELL_FACH state and receives a measurement control message with validity element set to 'CELL_DCH', the UE detects this inconsistency and rejects the message. This feedback mechanism ensures that only valid and consistent measurement configurations are accepted, preventing information loss and maintaining integrity across state transitions.
Data Source
AI summary
The details of an apparatus and method are disclosed for ensuring that a traffic volume measurement message does not have a validity of CELL_DCH when the user equipment in a UMTS communications system is in CELL_FACH state. The validity is set to other than CELL_DCH at a UTRAN or the UE rejects a message having a validity of CELL_DCH when the UE is in CELL_FACH state.