Cell Re-Selection Control via Autonomous Priority Suspension
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Solution Overview
Problem
In wireless communication systems, particularly in LTE networks, the autonomous priority handling technique leads to uneven distribution of user equipment (UE) access across frequencies and cells, causing network optimization challenges due to uncontrolled cell re-selection based on UE priorities.
Innovation Solution
Implementing a method where the network controls the suspension and resumption of autonomous priority handling by setting timers and receiving dedicated priority signals, allowing the UE to re-select cells based on network-defined frequency priorities, thereby optimizing network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If autonomous priority handling is applied by UEs, then UEs can independently select cells based on their own priorities, but the distribution of UE access becomes uneven and network optimization becomes difficult
Solution Approach 1:
The patent implements dynamic switching between autonomous priority handling and network-controlled priority handling. The network can send suspension/resumption commands to dynamically adjust whether UEs apply autonomous priority handling, allowing the system to adapt between UE autonomy and network control based on current network conditions, thus resolving the contradiction between adaptability and control complexity
Solution Approach 2:
The patent changes the parameter of priority application state by introducing suspension and resumption mechanisms. The network controls whether the priority parameter is applied by UEs through timing commands, transforming the static autonomous priority handling into a dynamically controllable parameter state, thereby balancing UE adaptability with network optimization capability
2Adaptability or versatility
If UEs access cells based on autonomous priority handling, then service differentiation is achieved, but UE concentration on specific cells occurs causing overload
Solution Approach 1:
The patent introduces network feedback mechanisms where the network monitors UE access patterns and sends suspension commands when overload is detected on specific cells. This feedback loop allows the network to maintain service differentiation while preventing UE concentration by dynamically adjusting autonomous priority handling based on actual network conditions
Solution Approach 2:
The system dynamically switches between autonomous and network-controlled priority handling based on network load conditions. When cells become overloaded, the network suspends autonomous handling to redistribute UEs, thereby maintaining both service differentiation and network reliability through adaptive control
3Device complexity
If network controls cell re-selection through frequency priority, then network optimization is improved, but UE flexibility in service-specific access is reduced
Solution Approach 1:
The patent segments priority handling into two distinct modes: autonomous priority handling for service-specific access and network-controlled priority handling for overall network optimization. This segmentation allows both objectives to coexist by applying the appropriate control mode based on whether service differentiation or network-wide optimization is the priority
Data Source
AI summary
Provided is a method for re-selecting a cell by a terminal in a wireless communication system. The method comprises: determining whether conditions for suspending application of autonomous priority handling are satisfied, the autonomous priority handling applying a priority order of a terminal which is different from a frequency priority order configured from a network for a particular frequency; if conditions for suspension are satisfied, re-selecting a cell by applying the configured priority order from the network to the particular frequency; determining whether start conditions for applying the autonomous priority order are satisfied; and if the start conditions are satisfied, re-selecting a cell by applying the priority order of the terminal for the particular frequency.