Carrier Allocation Based on Insertion Loss
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Solution Overview
Problem
In cellular wireless networks, base stations face challenges in efficiently offloading UEs from heavily loaded carriers without causing service disruptions, especially when landline connections are impractical, and insertion loss varies across carriers, affecting signal quality.
Innovation Solution
A method where a base station selects a target carrier for UE offloading based on higher insertion loss, transitioning UEs to carriers with greater signal loss to alleviate load and improve service quality, particularly for UE-relays that can withstand reduced coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a base station offloads UEs from heavily loaded carriers to carriers with lower insertion loss, then signal quality improves, but carrier load balance deteriorates
Solution Approach 1:
The base station changes the carrier selection parameter from purely signal quality-based to a composite parameter that includes both insertion loss and UE mobility characteristics. For high-mobility UEs, the system selects carriers with lower insertion loss even if they are more heavily loaded, whereas for low-mobility UEs, it prioritizes carriers with lower load despite higher insertion loss. This parameter change resolves the contradiction by adapting the selection criteria to UE-specific characteristics.
Solution Approach 2:
The carrier offloading mechanism dynamically adjusts target carrier selection based on real-time UE mobility status and current carrier load conditions. The system continuously monitors UE mobility characteristics and transitions UEs between carriers with different insertion loss profiles according to their mobility state, creating a dynamic balance between signal quality and load distribution that adapts to changing network conditions.
2Reliability
If a base station prioritizes carriers with lower insertion loss for UE offloading, then signal quality improves, but the number of UEs that can be served on available carriers decreases
Solution Approach 1:
The system introduces UE mobility characteristics as an additional selection parameter, transforming the carrier selection from a single-criterion (insertion loss) process to a multi-criterion process. This allows the base station to serve a broader range of UEs by matching them to appropriate carriers based on their mobility profiles, thereby increasing overall UE serving capacity while maintaining quality standards for each segment.
Solution Approach 2:
The base station segments the UE population into different mobility categories (high-mobility and low-mobility UEs) and applies different carrier selection strategies to each segment. High-mobility UEs are directed to carriers optimized for signal quality, while low-mobility UEs are directed to carriers with better load characteristics. This segmentation increases overall system capacity by efficiently utilizing available carrier resources for different UE types.
3Productivity
If a base station transitions UEs to carriers with higher insertion loss, then carrier load balance improves, but signal quality deteriorates
Solution Approach 1:
The base station modifies the carrier selection parameters to include UE mobility characteristics, which fundamentally changes how insertion loss is weighed in the decision process. For high-mobility UEs, the system accepts higher insertion loss carriers because these UEs will quickly move through coverage areas, making long-term signal quality less critical. For low-mobility UEs, the system prioritizes signal quality by selecting lower insertion loss carriers. This parameter change enables improved load balance without uniformly sacrificing signal quality.
Solution Approach 2:
The system dynamically adapts carrier selection based on real-time UE mobility status, creating a flexible load balancing mechanism that maintains appropriate signal quality for each UE's specific circumstances. High-mobility UEs are dynamically assigned to carriers that can handle their transient connections, while low-mobility UEs are assigned to carriers providing optimized signal quality. This dynamic approach achieves load balance while preserving service quality through adaptive decision-making.
Data Source
AI summary
When a base station is going to offload a UE from a carrier and is faced with a choice of whether to transition the UE from that carrier to a first carrier or rather to a second carrier, the base station will select the first carrier as the target carrier based at least on a determination that the first carrier has higher insertion loss than the second carrier. In addition, to help offset service of the UE on the high-insertion-loss carrier, the base station may block other UEs from being served on the first carrier.