Uplink Power Restriction Detection for Wireless Handover
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Solution Overview
Problem
Existing cell handover methods in wireless communication technologies fail to accurately detect uplink power restrictions, leading to premature uplink coverage restriction and increased call drop rates due to imbalance between uplink and downlink power, as they rely solely on downlink signal quality for handover triggering.
Innovation Solution
A method and apparatus that detect the modulation and coding scheme and initial block error rate of uplink data packets to determine uplink power restrictions, using thresholds to characterize uplink signal quality and trigger handovers when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell handover is triggered based on downlink signal quality, then downlink coverage is maintained, but uplink coverage is restricted earlier causing call drop
Solution Approach 1:
The patent introduces an intermediary detection mechanism that uses uplink data packet transmission characteristics (MCS index and block error rate) as intermediate indicators to infer uplink power restriction status. This intermediary approach allows the system to detect uplink coverage issues before they cause call drops, resolving the contradiction between maintaining downlink coverage and preventing uplink restriction.
Solution Approach 2:
The patent implements a feedback mechanism where the base station continuously monitors uplink data packet transmission status, including MCS index changes and block error rates, and uses this feedback to detect uplink power restriction. This feedback loop enables proactive handover triggering based on actual uplink conditions rather than relying solely on downlink signal quality.
2Reliability
If uplink transmit power is restricted, then uplink coverage is limited, but handover is not triggered timely causing call drop
Solution Approach 1:
The patent applies preliminary action by detecting uplink power restriction through monitoring MCS index and block error rate before the uplink coverage restriction becomes severe enough to cause call drop. This early detection triggers handover in advance, preventing the harmful effect of call drop while maintaining service continuity.
Solution Approach 2:
The patent introduces dynamic detection of uplink power restriction status by continuously monitoring changes in MCS index and block error rate of uplink data packets. This dynamic approach allows the system to adapt to changing uplink conditions and trigger handover at the appropriate moment, resolving the timing contradiction.
3Area of stationary object
If downlink signal quality threshold is used for handover, then downlink coverage is optimized, but uplink-downlink coverage imbalance occurs
Solution Approach 1:
The patent segments the coverage optimization problem into separate downlink and uplink components. Downlink coverage is optimized using traditional signal quality thresholds, while uplink coverage is independently monitored through MCS index and block error rate detection. This segmentation allows each link to be optimized independently, resolving the coverage imbalance.
Solution Approach 2:
The patent applies local quality by introducing specialized detection mechanisms for uplink power restriction that are distinct from downlink signal quality measurement. The uplink detection focuses locally on transmission power characteristics through MCS and error rate analysis, while downlink optimization maintains its own metrics, allowing each direction to have optimized local characteristics.
Data Source
AI summary
Embodiments of the present invention provide a method, an apparatus, and a base station device for detecting uplink power. The method includes: detecting a modulation and coding scheme and an initial block error rate of an uplink data packet sent by a user equipment; determining, according to a relationship between an index of the detected modulation and coding scheme of the uplink data packet sent from the UE and a first threshold, and a relationship between the detected initial block error rate of the uplink data packet sent from the UE and a second threshold, whether uplink power of the user equipment is restricted.