LTE Handover Judgment Using ECGI to Resolve PCI Aliasing
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Solution Overview
Problem
The existing LTE handover scenario judgment methods in cellular wireless communication systems suffer from a high error rate due to PCI aliasing, which makes it difficult to uniquely determine the target cell, leading to undesirable handover scenarios such as too early, too late, or wrong cell handovers, negatively impacting user experience and wasting network resources.
Innovation Solution
Incorporating the Evolved Cell Global Identifier (ECGI) in uplink messages to enable network-side handover scenario judgments, which is a unique identifier for layer 3, allowing for accurate determination of the target cell and reducing the error rate in handover scenario judgments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PCI (Physical Cell Identity) is used for handover scenario judgment, then the judgment process is simple, but the error rate is high due to PCI aliasing making it difficult to uniquely determine the target cell
Solution Approach 1:
The patent changes the identifier parameter from PCI (Physical Cell Identity) to ECGI (Evolved Cell Global Identifier). ECGI is a unique identifier that combines PLMN ID and Cell ID, eliminating the aliasing problem of PCI while enabling accurate handover scenario judgment. This parameter change directly resolves the contradiction between judgment accuracy and identifier complexity.
2Productivity
If handover parameters are not optimized, then the network configuration remains simple, but handover failures and ping-pong handovers occur frequently, wasting network resources
Solution Approach 1:
The patent implements a feedback mechanism where the network side receives handover scenario judgment results from the UE and uses this information to automatically optimize handover parameters. The base station adjusts handover parameters based on feedback about too early handovers, too late handovers, and wrong cell handovers, thereby improving network resource utilization through automated optimization.
Solution Approach 2:
The UE performs self-measurement and self-judgment of handover scenarios, reporting results to the network side. The network side then autonomously optimizes handover parameters without manual intervention, enabling the system to self-service and automatically improve performance while reducing resource waste.
3Reliability
If manual handover parameter configuration is used, then the system complexity is low, but handover performance cannot be dynamically optimized according to network changes
Solution Approach 1:
The patent enables the network to perform self-optimization of handover parameters through automated measurement, judgment, and adjustment processes. The base station automatically configures handover parameters based on network conditions and handover scenario feedback, improving handover reliability without requiring manual configuration while implementing dynamic adaptation to network changes.
Data Source
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AI summary
The disclosure provides a method and user equipment for reporting a handover scenario judgment parameter and a base station for a handover scenario judgment; the method includes: an uplink message transmitted by the User Equipment (UE) includes an Evolved Cell Global Identifier (ECGI) so that a network side performs a handover scenario judgment based on the ECGI, wherein the uplink message is a message that includes Radio Link Failure (RLF)-related measurement information, or the uplink message is a message that includes an indication of RLF-related measurement information. Therefore, the disclosure enables an accurate handover scenario judgment, thus avoiding the problem in the related art that the error rate of a handover scenario judgment is high.