Radio Network Controller Demotion Protocol for Cellular Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
State machine promotions and demotions in cellular communications networks lead to inefficient radio resource usage and energy consumption due to 'tail effects', where demotions can occur too early, interrupting background packet transmissions and degrading user experience.
Innovation Solution
A state-machine-aware application protocol that includes an online scheduler and a new batching protocol, where packets are labeled as 'N', 'B', and 'T' to manage demotions based on the completion of batching transfers and the presence of background packets, allowing for safe state transitions without interrupting ongoing transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If demotion is performed immediately after batching transfer completion, then radio resource usage efficiency is improved, but background packet transmission may be interrupted
Solution Approach 1:
The system performs preliminary detection of background packet status before executing demotion. The RNC checks whether background packets are present in the buffer before transitioning the state machine from CELL_DCH to CELL_FACH state, preventing premature demotion that would interrupt background transmissions
Solution Approach 2:
The system implements feedback mechanism by continuously monitoring the buffer status for background packets. The state machine demotion decision is based on real-time feedback about whether background packets are active, ensuring demotion only occurs when safe to do so without interrupting ongoing transmissions
2Reliability
If state machine demotion is delayed to ensure background packet completion, then transmission reliability is improved, but tail effects increase wasting energy and resources
Solution Approach 1:
The system performs preliminary checking of buffer status before demotion to determine the earliest safe demotion point. By proactively detecting when background packets are no longer present, the system can demote immediately without delay, avoiding unnecessary energy consumption during tail periods
Solution Approach 2:
The system uses its own buffer status information to make autonomous demotion decisions. The RNC monitors its own buffer for background packets and automatically determines when demotion is safe, eliminating the need for external coordination or delayed demotion strategies
3Adaptability or versatility
If frequent state promotions and demotions are performed, then system adaptability is improved, but management overhead increases
Solution Approach 1:
The system extracts and separates foreground and background packet handling into distinct processing paths. By identifying and isolating background packet status checking from the general packet processing flow, the system reduces management overhead while maintaining adaptability to different packet types
Data Source
AI summary
A method, computer readable medium and apparatus for performing a demotion in a cellular communications network are disclosed. For example, the method receives a packet indicating that a batching transfer is completed, determines if a background packet was received after receiving the packet indicating that the batching transfer is completed and demotes a state of a state machine implemented by a radio network controller to a lower state if the background packet was not received.