Dynamic Device Category Switching for Wearable Link Budget Optimization
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Solution Overview
Problem
Existing LTE device categories do not adequately address the need for improved link budget and quality of service (QoS) requirements, particularly for wearable devices that require a compromise between link budget and QoS.
Innovation Solution
The introduction of a new device category, Cat-A, which satisfies specified QoS requirements and link budget requirements, allowing UE devices to switch between different device categories based on link budget and QoS conditions, optimizing power consumption and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing LTE device categories are used, then device compatibility and communication standards are maintained, but link budget and quality of service requirements are not adequately addressed for wearable devices
Solution Approach 1:
The patent implements dynamic device category indication where a UE can switch between different device categories (e.g., Cat-M1, Cat-1, Cat-0) based on current QoS requirements and link budget conditions. The network can dynamically assign different device categories through RRC reconfiguration, allowing the system to adapt to changing operational conditions rather than being fixed to a single category.
Solution Approach 2:
The patent changes the device category parameter to optimize performance. By indicating different device categories (Cat-M1, Cat-1, Cat-0) with specific communication parameter sets, the system can adjust parameters such as bandwidth, power consumption, and data rates to match the current QoS and link budget requirements of wearable devices.
2Use of energy by moving object
If device category is fixed, then communication stability is maintained, but power consumption optimization and performance adaptation are limited
Solution Approach 1:
The patent enables dynamic switching between device categories based on power consumption requirements and performance needs. The UE can indicate support for multiple device categories and switch between them depending on whether power saving or high performance is the priority, allowing optimization of the power-performance tradeoff in real-time.
Solution Approach 2:
Different device categories have different power consumption characteristics and performance capabilities. By changing the device category parameter, the system can select operating modes that optimize power consumption for low-activity periods while maintaining high performance capability when needed, directly addressing the power-performance contradiction.
3Reliability
If link budget requirements are increased, then communication reliability improves, but QoS sensitivity increases and throughput may be limited
Solution Approach 1:
The patent allows dynamic selection of device categories based on current link budget conditions and QoS requirements. When link budget is sufficient, the system can switch to categories supporting higher throughput. When link budget is constrained, it switches to categories prioritizing reliability, thus dynamically balancing the reliability-throughput tradeoff.
Solution Approach 2:
Different device categories have different parameter sets including bandwidth allocations, modulation schemes, and throughput capabilities. By changing the device category parameter, the system can adjust these parameters to match current link budget conditions, ensuring reliable communication when resources are limited while enabling higher throughput when resources are abundant.
Data Source
AI summary
A user equipment (UE) device may communicate according to a new device category satisfying specified QoS (quality of service) requirements while also satisfying specified link budget requirements, and/or additional optimization requirements. The UE device may communicate with a cellular base station according to a first mode of operation associated with the new device category, and may switch to communicating with the cellular base station according to a second mode of operation associated with a second (pre-existing) device category in response to the link budget requirements exceeding a specified value and the quality of service requirements not being sensitive. The UE device may also switch to communicating with the cellular base station according to a third mode of operation associated with a third (pre-existing) device type in response to the link budget requirement not exceeding the specified value, or the QoS requirements being sensitive and a downlink throughput requirement exceeding a specified throughput value.