Base Station Connection Termination for Latency and Load Management
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Solution Overview
Problem
In mobile radio communications, maintaining low access latency while preventing data processing overload in radio access network nodes due to excessive control signaling is challenging, especially when managing mobility-related control processing loads in LTE systems.
Innovation Solution
The technology regulates data processing loads by determining connection activity levels and deciding whether to terminate connections based on the likelihood of handover requests and current data processing loads, informing neighboring base stations of load states to manage handover requests and reduce control processing loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If UEs stay in RRC connected state to reduce access latency, then access latency is reduced, but control signaling load and data processing load in base station increase
Solution Approach 1:
The patent dynamically changes the RRC connection state parameter based on activity level and data processing load conditions. When activity level is below threshold or load exceeds threshold, the connection is transitioned from connected to idle state, effectively using parameter changes to resolve the contradiction between maintaining low latency and reducing processing load.
Solution Approach 2:
The patent implements dynamic connection management where the RRC connection state is not fixed but adapts based on real-time conditions including activity level measurements and data processing load assessments. This dynamic approach allows the system to switch between connected and idle states optimally balancing latency and processing load.
2Reliability
If base station maintains connections with multiple UEs to provide continuous service, then service continuity is improved, but control processing load increases
Solution Approach 1:
The patent uses activity level as a parameter to determine when to transition connections from connected to idle state. By monitoring activity level and comparing against thresholds, the system dynamically adjusts connection states to maintain service continuity for active UEs while reducing control processing load by transitioning inactive UEs to idle state.
3Adaptability or versatility
If base station accepts all handover requests to maintain mobility, then mobility support is improved, but data processing overload increases
Solution Approach 1:
The patent implements feedback mechanisms where base stations exchange data processing load information with neighboring base stations. This feedback allows the system to make informed handover decisions, directing handovers to base stations with lower load and preventing handovers that would exacerbate overload conditions, thus maintaining mobility support while managing data processing load.
Solution Approach 2:
The patent makes handover acceptance dynamic based on real-time data processing load conditions. Base stations continuously assess their load and adjust handover acceptance decisions accordingly, transitioning from always accepting handovers to conditionally accepting handovers based on current processing capacity and activity levels.
Data Source
AI summary
A control signal data processing load associated with mobile terminals currently having a connection with a radio access network is regulated. The connection is terminated when the control processing cost for maintaining the connection exceeds the benefit of maintaining the connection to achieve shorter access latency. A connection activity level is determined for current connections between multiple mobile terminals and a base station. A current data processing load in the base station associated with the mobile terminal control signaling is calculated. A decision is made whether one or more of the mobile terminals is likely to request a handover of its respective connection to a neighboring base station. Based on the current load, the likelihood of requesting handover of the respective connection, and the connection activity level determined for the respective connection, a decision is made whether to terminate the respective connection.