Cell Barring via Error Thresholds in Wireless Systems
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Solution Overview
Problem
Wireless communication systems face challenges in handling erroneous messages from network cells, leading to service disruptions and 'trapping' of user equipment (UE) on dysfunctional cells, as traditional error handling strategies may result in prolonged inability to obtain service.
Innovation Solution
A method and apparatus that track errors during message decoding and initiate cell reselection procedures, considering a network cell as barred if errors exceed a threshold, allowing the UE to avoid malfunctioning cells and reselect a new one.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE is configured to ignore faulty messages from a network cell, then the UE can avoid service degradation from transient errors, but the UE may become trapped on a dysfunctional network cell and become substantially unable to obtain service
Solution Approach 1:
The patent implements dynamic error threshold adjustment where the UE monitors the number of erroneous messages received from a network cell and compares it against a configurable threshold. When the threshold is exceeded, the UE dynamically transitions from ignoring errors to initiating cell reselection procedures. This dynamic approach allows the system to adapt to different error conditions and respond appropriately, resolving the contradiction between maintaining service continuity and avoiding cell trapping.
Solution Approach 2:
The patent establishes a feedback mechanism where the UE continuously monitors message errors from the current network cell and uses this information to trigger cell reselection procedures when necessary. The feedback loop compares the number of erroneous messages against the threshold and adjusts UE behavior accordingly, enabling the system to distinguish between transient errors (where continued monitoring is beneficial) and persistent failures (where cell reselection is needed).
2Reliability
If the UE takes excessive precautionary action to avoid erroneous messages, then the UE can prevent service disruptions, but the UE may be overly reactive to transient errors and unable to obtain service from temporarily degraded cells
Solution Approach 1:
The patent changes the parameter of error tolerance by introducing a configurable threshold that determines when precautionary cell reselection should be triggered. By adjusting this threshold parameter, the system can differentiate between acceptable error rates (where the cell remains usable) and unacceptable error rates (where reselection is needed). This parameter-based approach prevents overly reactive behavior while maintaining reliable error handling.
3Stability of the object's composition
If the UE waits for extensive error accumulation before initiating cell reselection, then the UE can avoid premature cell changes, but the UE experiences prolonged service disruptions when the network cell becomes dysfunctional
Solution Approach 1:
The patent implements preliminary action by pre-configuring the error threshold and cell reselection procedures before service disruption occurs. When erroneous messages are received, the UE immediately compares the error count against the pre-established threshold and initiates reselection procedures without delay. This preliminary preparation ensures that the system responds appropriately to error conditions while maintaining stable cell connections during normal operation, preventing prolonged service disruptions.
Data Source
AI summary
Systems and methodologies are described herein that facilitate cell barring based on erroneous messages received within a wireless communication system. As described herein, in the event that a device fails to receive and/or decode respective messages transmitted from a network cell over a common communication channel, the device can implement one or more error handling procedures as described herein to reselect away from the network cell and/or a frequency associated with the network cell (e.g., as if the network cell was explicitly barred). Cell barring can be triggered as described herein based on a count of erroneous messages (e.g., consecutive messages, messages received within a predetermined time window, etc.), elapsed time between erroneous messages, or the like. Further, cell barring can be performed as described herein based on failure to acquire pre-scheduled system information, common system information determined to have invalid abstract syntax, or the like.