Mobile Station Receiver Class Customization for Handover Optimization
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Solution Overview
Problem
In wireless communications systems, improved mobile station receivers with enhanced sensitivity lead to increased demand for Walsh code resources during soft handovers, resulting in inefficient network channel resource allocation and underutilization of advanced receiver capabilities.
Innovation Solution
A method where mobile stations provide receiver class information to the network, allowing customization of handover parameters based on individual receiver capabilities, such as interference cancellation and sensitivity, to optimize resource allocation and handover decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If improved receiver sensitivity is implemented in mobile stations, then receiver sensitivity is improved, but network channel resource allocation efficiency deteriorates
Solution Approach 1:
The patent applies local quality by customizing handover parameters specifically for improved mobile stations based on their receiver class capability. Instead of applying uniform handover parameters to all mobile stations, the system selectively adjusts parameters such as pilot signal strength thresholds and handoff margins only for stations with enhanced receivers, allowing them to detect weaker pilot signals and perform handovers at appropriate times without unnecessarily consuming Walsh code resources.
Solution Approach 2:
The patent implements parameter changes by modifying handover parameters based on the mobile station's receiver class capability. The system changes critical parameters including pilot signal strength thresholds, handoff margins, and Walsh code assignment criteria dynamically according to the mobile station's detection capability, thereby optimizing resource allocation while maintaining the benefits of improved receiver sensitivity.
2Measurement precision
If improved receiver sensitivity is implemented in mobile stations, then receiver sensitivity is improved, but Walsh code resource consumption increases
Solution Approach 1:
The patent applies local quality by implementing receiver class-specific handover parameter customization. Improved mobile stations are identified and assigned differentiated handover parameters that account for their enhanced detection capabilities, ensuring they only consume Walsh code resources when genuinely needed rather than during routine handovers that legacy stations would not trigger.
Solution Approach 2:
The patent applies partial action by selectively enabling enhanced handover detection only for improved mobile stations with advanced receivers. The system partially activates the enhanced detection capability by applying it only to stations that have explicitly indicated their improved receiver class capability through capability indication messages, rather than applying it universally to all mobile stations.
3Measurement precision
If advanced receiver capabilities are utilized, then receiver sensitivity is improved, but network resource utilization deteriorates
Solution Approach 1:
The patent applies dynamics by implementing dynamic handover parameter adjustment based on mobile station receiver class capability. The system continuously adapts handover parameters such as pilot signal strength thresholds and handoff margins according to the specific capabilities of each mobile station, allowing the network to optimize resource utilization in real-time rather than using static, one-size-fits-all parameters.
Solution Approach 2:
The patent implements parameter changes by modifying critical handover parameters including pilot signal strength thresholds, handoff margins, and Walsh code assignment criteria based on the mobile station's receiver class capability. These parameter changes enable the network to fully utilize advanced receiver capabilities while maintaining efficient resource allocation through capability-based differentiation.
Data Source
AI summary
A mobile station (201) having an improved receiver capability over legacy mobile stations may detect additional base stations (205, 209) for the candidate list (219). The mobile station (201) provides a receiver capability indication to the network via a message such as an origination message, a page response message, a handover message, or a registration message. The message may utilize one or more bit fields of an information packet (300), or otherwise an information element (401) to convey the receiver capability information. The BTS (203) or BSC (109) will accordingly customize the mobile station handover parameters to better utilize the mobile station capabilities.