Mobile Terminal E-DCH Suspension for Neighbor Cell Interference
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Solution Overview
Problem
Mobile terminals operating in the CELL_FACH state often create neighbor cell interference due to lack of uplink power control, leading to inefficient operation and potential radio link failures, as existing signaling-based methods are complex or ineffective in all scenarios.
Innovation Solution
A method that determines the presence of reselection conditions based on reselection data, allowing the mobile terminal to suspend or release a network resource like the enhanced dedicated channel (E-DCH) to trigger a reselection of a new serving cell, thereby reducing neighbor cell interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mobile terminal operates in CELL_FACH state with enhanced uplink (Common E-DCH), then data transmission capability is improved, but neighbor cell interference increases
Solution Approach 1:
The patent applies preliminary action by having the mobile terminal proactively suspend or release the E-DCH resource before interference occurs or at the first sign of interference conditions. The terminal monitors for reselection conditions and preemptively modifies the E-DCH resource to prevent harmful interference to neighbor cells, rather than reacting after interference has already degraded performance
Solution Approach 2:
The patent inverts the traditional approach by having the mobile terminal autonomously suspend or release the E-DCH resource based on its own determination of reselection conditions, rather than waiting for network control signals. This inversion of control allows the terminal to self-regulate interference, switching from a network-controlled resource management model to a terminal-autonomous model that prioritizes interference mitigation
2Adaptability or versatility
If mobile terminal operates in CELL_FACH state, then uplink power control flexibility is improved, but ability to identify and control neighbor cell interference deteriorates
Solution Approach 1:
The patent applies self-service by enabling the mobile terminal to autonomously detect reselection conditions and determine when to suspend or release the E-DCH resource without requiring active communication with neighbor cells or complex network coordination. The terminal uses its own measurements and stored reselection data to self-determine interference conditions and self-regulate the resource, making the system self-sufficient in interference management
3Object-generated harmful factors
If signaling-based methods are used to control neighbor cell interference, then interference mitigation capability is improved, but system complexity increases
Solution Approach 1:
The patent extracts the interference control function from the complex signaling-based methods and implements it as a simplified autonomous decision-making process at the mobile terminal. By removing the need for complex inter-cell signaling and network coordination, the solution isolates the essential interference mitigation capability into a standalone terminal-based mechanism that achieves interference control without the overhead of complex system-wide signaling
Data Source
AI summary
A method, apparatus and computer program product are provided in order to trigger a reselection of a serving cell in an instance in which a mobile terminal may be creating neighbor cell interference. Based upon received reselection data, the mobile terminal may release and/or suspend a network resource, such as an enhanced dedicated channel in order to trigger a reselection of a new serving cell. In this regard, a method is provided that includes determining the presence of a reselection condition based on reselection data. In an instance in which the presence of the reselection condition is determined, the method includes causing a network resource to be modified. The method also includes causing a reselection of a serving cell.