Cell Handover Using RSRP Boundaries to Avoid Uplink Interference
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Solution Overview
Problem
Existing inter-cell handover methods prioritize neighboring cells based on downlink signal quality, failing to account for uplink interference, which significantly reduces user experience.
Innovation Solution
An interference processing method that determines a downlink RSRP boundary value to differentiate between normal and interference regions within a cell, enabling timely handover of user equipment (UE) to avoid uplink interference by selecting candidate target cells with guaranteed call quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If handover selection is based on downlink signal quality, then terminal can be handed in to neighboring cells with low downlink interference, but uplink interference cannot be avoided and call quality deteriorates
Solution Approach 1:
The patent segments the cell coverage area into normal coverage area and interference coverage area based on downlink RSRP boundary values. By dividing the coverage area, the system can identify and avoid uplink interference regions while maintaining downlink signal quality optimization, thus resolving the contradiction between downlink signal quality measurement and call quality reliability.
Solution Approach 2:
The patent performs preliminary identification of interference coverage areas by calculating downlink RSRP boundary values before handover execution. This preliminary action allows the system to predict and avoid uplink interference regions in advance, ensuring call quality while still optimizing downlink signal quality for handover selection.
2Ease of operation
If existing handover methods are used, then neighboring cell selection is simplified, but interference regions cannot be identified and UE cannot be migrated out timely
Solution Approach 1:
The patent performs preliminary calculation of downlink RSRP boundary values to identify interference coverage areas before handover execution. This preliminary identification enables timely migration of UEs out of interference regions while maintaining simplified handover operations, thus resolving the contradiction between ease of operation and handover success rate.
Solution Approach 2:
The patent introduces downlink RSRP boundary values as an intermediary parameter to identify interference coverage areas. This intermediary mechanism enables the system to detect and avoid interference regions without complicating the handover operation process, thus maintaining ease of operation while improving handover success rate.
3Measurement precision
If UE is handed in to neighboring cells with better downlink quality, then downlink signal quality is optimized, but uplink interference impact increases
Solution Approach 1:
The patent segments the cell coverage into normal coverage area and interference coverage area using downlink RSRP boundary values. This segmentation allows the system to optimize downlink signal quality by selecting neighboring cells with better downlink quality while simultaneously avoiding uplink interference by preventing handover into interference coverage areas.
Solution Approach 2:
The patent changes the handover decision parameter from solely downlink signal quality to a combination of downlink signal quality and downlink RSRP boundary values. This parameter change enables the system to optimize downlink signal quality while avoiding uplink interference by comparing measured downlink RSRP against the calculated boundary values.
Data Source
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AI summary
Disclosed are an interference processing method, apparatus and system, and a storage medium, belonging to the technical field of communications. The method comprises: determining a downlink reference signal receiving power (RSRP) boundary value of a cell; receiving a downlink RSRP measurement value reported by a user equipment (UE); and when the downlink RSRP measurement value is less than the downlink RSRP boundary value, migrating the UE out of the cell.