CoMP Transmission Point Management via Reference Signal Configuration
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Solution Overview
Problem
The current LTE scheme lacks regulation for the addition and change of CoMP transmission points performing coordinated multi-point transmission/reception processes, which affects the efficiency and management of these processes.
Innovation Solution
A mobile communication method and system where a radio base station notifies configuration information of a reference signal to a mobile station for CoMP transmission points, allowing the mobile station to measure and report channel quality, enabling the radio base station to manage the addition or change of CoMP transmission points during the CoMP transmission/reception process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CoMP transmission/reception process is implemented to improve throughput in cell edge mobile stations, then system throughput is improved, but there is no regulation for addition and change of CoMP transmission points causing management complexity
Solution Approach 1:
The patent segments the CoMP transmission point management by introducing distinct reference signal configurations for different transmission points. Each transmission point has its own reference signal resource configuration, allowing independent measurement and management. This segmentation enables the system to handle multiple transmission points without increasing overall management complexity, as each can be configured and measured separately through standardized procedures.
Solution Approach 2:
The patent applies preliminary action by configuring reference signal resources for CoMP transmission points in advance through RRC connection reconfiguration messages. The base station pre-configures the mobile station with reference signal information for current and potential future transmission points, so that when transmission points are added or changed, the mobile station is already prepared to measure and report on them without requiring complex real-time management decisions.
2Measurement precision
If reference signal configuration is notified to mobile station for each transmission point, then channel quality measurement accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies universality by using a standardized reference signal configuration framework that serves multiple transmission points. The same RRC connection reconfiguration message structure and measurement reporting mechanisms are used across all CoMP transmission points, allowing the system to maintain high measurement precision through detailed configuration while avoiding redundant signaling. The universal framework enables efficient resource allocation and reduces overall signaling overhead compared to point-specific custom configurations.
Data Source
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AI summary
The addition and change of a CoMP transmission point performing a CoMP transmission/reception process is appropriately performed. A mobile communication method includes: a step of notifying, by a radio base station (eNB), configuration information of CSI-RS of a CoMP transmission point to a mobile station (UE) connected to a cell (#5) managed by the radio base station (eNB), when instructing an addition or change of the CoMP transmission point performing a CoMP transmission/reception process by "RRC Connection Reconfiguration"; a step of measuring, by the mobile station (UE), a CQI of the CoMP transmission point by using the CSI-RS of the CoMP transmission point, while performing the CoMP transmission/reception process; and a step of notifying, by the mobile station (UE), the CQI of the CoMP transmission point to the radio base station (eNB).