Wireless Handover via Uplink Downlink Signal Negotiation
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Solution Overview
Problem
Current wireless handover techniques often compromise the efficiency and effectiveness of wireless network resource use by solely relying on downlink signal quality without considering uplink signal quality, leading to inefficient resource allocation and connectivity issues.
Innovation Solution
The system negotiates handover parameters between base stations based on both downlink and uplink signal qualities, ensuring optimal resource allocation and connectivity by exchanging signal quality reports and negotiating handover parameters via an interface, such as the Xn interface, to determine the best handover conditions for user devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover decision is based solely on downlink signal quality, then downlink communication effectiveness is improved, but uplink resource utilization deteriorates
Solution Approach 1:
The patent combines both downlink signal quality metrics (RSSI, RSRP, RSRQ) and uplink signal quality metrics (SRS-RSSI, SRS-RSRP) into a unified handover decision framework. The base station evaluates both downlink and uplink conditions simultaneously when determining whether to initiate handover, ensuring that resource allocation decisions account for bidirectional communication quality rather than relying solely on downlink measurements.
2Reliability
If handover is triggered based on downlink signal quality alone, then user device receives data effectively, but base station cannot receive uplink data efficiently
Solution Approach 1:
The patent implements a feedback mechanism where the base station measures uplink signal quality using sounding reference signals (SRS) and uses this feedback information to adjust handover decisions. The base station continuously monitors both downlink and uplink signal qualities and uses this combined feedback to determine optimal handover timing, preventing scenarios where downlink is strong but uplink fails.
3Reliability
If traditional handover methods are used, then device connectivity is maintained, but wireless network resource efficiency deteriorates
Solution Approach 1:
The patent changes the decision parameters for handover from considering only downlink signal quality to evaluating both downlink and uplink signal quality metrics. By modifying the handover trigger conditions to include uplink measurements (SRS-RSSI, SRS-RSRP) alongside downlink measurements, the system avoids unnecessary handovers and optimizes resource allocation, preventing resource waste while maintaining connectivity.
Data Source
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AI summary
The present disclosure describes techniques and systems for handing over a connection of a user device, within a wireless network, based on qualities of downlink signals and qualities of uplink signals. These techniques and systems include a base station and a neighboring base station negotiating handover parameters, based on the qualities of downlink signals as detected by a user device and the qualities of uplink signals as detected by the base station and the neighboring base station. The base station and neighboring base station negotiate the handover parameters via an interface connecting the base station to the neighboring base station.