Radio Resource Management via Load-Based Inactivity Detection
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Solution Overview
Problem
In wireless communication systems like UMTS with HSDPA, maintaining high-speed shared channels is inefficient due to resource wastage from inactive connections, leading to reduced system throughput, accessibility, and increased power consumption, especially when user mobility and channel variations cause unused resources to be retained, thereby limiting the number of active users and affecting cell handovers.
Innovation Solution
Implementing load-based inactivity detection to monitor and release resources allocated to inactive high-speed shared channel connections, transferring them to lower capacity channels when inactive for a predetermined time, thereby optimizing resource utilization and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resources are maintained for inactive HSDPA connections to ensure quick reactivation, then user service continuity is improved, but system throughput and resource utilization deteriorate due to resource wastage
Solution Approach 1:
The patent implements dynamic resource management by transitioning connections between active and inactive states based on activity monitoring. The system dynamically adjusts resource allocation by moving connections to inactive state after detecting inactivity, thereby optimizing resource utilization while maintaining the ability to quickly reactivate services when needed.
Solution Approach 2:
The system changes the operational parameters of connections by introducing an inactive state with reduced resource allocation. By monitoring activity levels and transitioning connections between different states (active/inactive), the system optimizes resource parameters to balance service continuity with throughput efficiency.
2Adaptability or versatility
If resources are allocated to maintain inactive connections, then accessibility for returning users is improved, but power consumption increases due to continuous resource maintenance
Solution Approach 1:
The system implements periodic activity monitoring for inactive connections to determine whether to maintain or release resources. By periodically checking activity levels and transitioning connections between active and inactive states, the system reduces power consumption while maintaining accessibility for users who resume activity within the monitoring period.
Solution Approach 2:
The system changes power consumption parameters by introducing an inactive state with reduced resource allocation. Connections transition from high-power active state to low-power inactive state based on activity detection, thereby reducing overall power consumption while maintaining the ability to quickly reactivate services.
3Adaptability or versatility
If resources are retained for potential active users, then service availability is improved, but the number of active users that can be supported deteriorates due to resource limitations
Solution Approach 1:
The system dynamically manages the quantity of active connections by transitioning inactive connections to a low-resource state. This dynamic state transition allows the system to maintain service availability for potential users while freeing up resources to support a larger number of actively transmitting users.
Solution Approach 2:
The system changes resource allocation parameters by introducing an inactive state with reduced resource consumption. This parameter change allows the same total resources to support both inactive connections (with minimal resources) and active users, thereby increasing the overall capacity for active users while maintaining service availability.
Data Source
AI summary
The data transmission activity of established connections is monitored along with a measure of the load or drain on communication resources. When the load on communication resources increases or when it moves past a threshold, inactivity over an connection is not permitted or is permitted for a shorter time before releasing that user's connection. On the other hand, lower loads allow for a longer (or no) inactivity period before disconnecting the connection. Once inactivity on a connection exceeds the time determined based on load, that connection may be transferred to a lower capacity channel, e.g., a common channel. Alternatively, that inactive connection may be disconnected.