Wireless Device Messaging Control for Link Budget Constraints
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Solution Overview
Problem
Link budget limited wireless devices, such as wearable devices, experience frequent radio link failures and out-of-service conditions due to limited communication range and battery power constraints, leading to high power consumption in managing operational issues like tracking area updates and measurement reports.
Innovation Solution
Implement methods in wireless devices to selectively manage power consumption by skipping or delaying tracking area updates, storing measurement reports, and transitioning to idle states based on battery levels and signal quality, allowing devices to recover communication and prioritize data transmission over report sending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless device transmits tracking area update messages and measurement reports frequently to maintain service availability, then the reliability of communication service is improved, but the power consumption increases and battery life decreases
Solution Approach 1:
The patent applies partial action by selectively transmitting tracking area update messages and measurement reports only when necessary, rather than continuously. The device evaluates conditions such as battery level thresholds and signal quality metrics to determine whether to transmit these messages, thereby performing only the minimum necessary communication actions to maintain service availability while reducing overall power consumption.
Solution Approach 2:
The patent changes operational parameters dynamically based on device state. When battery level falls below a threshold or signal quality degrades, the device adjusts its behavior by skipping non-critical transmissions like tracking area updates. This parameter-based adaptation allows the system to maintain reliability when conditions permit while conserving energy when resources are constrained.
2Reliability
If the wireless device recovers communication after radio link failure by transmitting tracking area update messages, then the communication service is restored, but the battery power is depleted faster
Solution Approach 1:
After radio link failure recovery, the device performs partial action by conditionally transmitting tracking area update messages based on battery level assessment. If battery power is sufficient, the device transmits the message to restore full service. If battery power is low, the device skips the transmission and maintains a reduced operational state, thereby preserving battery life while still achieving communication recovery through alternative means.
Solution Approach 2:
The device applies self-service by autonomously evaluating its own battery status and signal conditions to determine whether to transmit recovery messages. This self-assessment mechanism allows the device to make intelligent decisions about resource allocation, balancing service restoration needs against power conservation requirements without external intervention.
3Reliability
If the wireless device performs cell search and transitions to connected state to maintain service, then the communication reliability is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic state transitions based on real-time conditions. The device monitors signal quality metrics and battery levels to determine whether to transition from idle to connected state. When signal quality is poor or battery is low, the device remains in idle state, performing cell search only when necessary. This dynamic adaptation allows the system to maintain connectivity when conditions permit while conserving energy when resources are constrained.
Solution Approach 2:
The device changes its operational state parameters dynamically based on environmental and resource conditions. By adjusting the threshold for transitioning to connected state and modifying cell search frequency based on battery level and signal quality, the system optimizes the balance between maintaining communication reliability and minimizing power consumption in varying operational contexts.
Data Source
AI summary
Systems, apparatuses, and methods for messaging improvements in link budget limited devices. A link budget limited device may be configured to suppress or delay tracking area update messages in various situations. Additionally, or alternatively, the link budget limited device may be configured to transition to idle mode instead of performing handover or recovery from radio link failure when the target base station has a signal quality less than a threshold. Additionally, or alternatively, the link budget limited device may be configured to suppress or delay measurement reports in poor signal quality conditions.