CoMP Signaling Control Information RRC DCI Coordination
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Solution Overview
Problem
In wireless communication systems, particularly in CoMP transmission/reception environments, there is a need for efficient signaling of control information to improve data reception performance and radio resource use efficiency, as existing methods struggle to effectively coordinate multipoint communication, leading to interference and reduced channel estimation accuracy.
Innovation Solution
A method for efficiently signaling control information in CoMP transmission, involving the configuration of CSI-RS resources and PDSCH RE mapping, using RRC and DCI signaling to notify terminals of relevant resource information, thereby enhancing channel estimation and reducing interference, particularly through the use of quasi co-location of CSI-RS and DM-RS resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CoMP transmission is implemented with multiple transmission points, then data transmission capacity and coverage are improved, but interference between transmission points increases and channel estimation accuracy deteriorates
Solution Approach 1:
The patent segments the control information signaling into two parts: semi-static configuration information (RRC signaling) and dynamic indication information (DCI signaling). This segmentation allows different types of information to be transmitted through appropriate channels, improving overall signaling efficiency and reducing interference in CoMP transmission.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network side device uses both RRC signaling and DCI signaling to coordinate multiple transmission points. This intermediary signaling system manages the complexity of multi-point coordination and mitigates interference through structured information exchange.
2Reliability
If control information is signaled using existing methods, then basic communication is maintained, but signaling efficiency is insufficient and resource utilization deteriorates
Solution Approach 1:
The patent applies multi-functionality by using RRC signaling for semi-static configuration and DCI signaling for dynamic indication. This universal approach allows the system to handle both static and dynamic control information efficiently, improving overall signaling productivity while maintaining communication reliability.
Solution Approach 2:
The patent introduces dynamics by combining static RRC configuration with dynamic DCI indication. This allows the control signaling system to adapt to changing transmission conditions in CoMP scenarios, improving signaling efficiency without compromising reliability.
3Loss of energy
If reference signal resources are not properly configured, then signaling overhead is reduced, but channel estimation accuracy and data reception performance deteriorate
Solution Approach 1:
The patent applies preliminary action by configuring CSI-RS resources and PDSCH RE mapping information in advance through RRC signaling. This pre-configuration reduces the need for repeated signaling and optimizes channel estimation accuracy before actual data transmission occurs.
Solution Approach 2:
The patent replaces excessive mechanical signaling with a more efficient system that uses RRC for configuration and DCI for dynamic indication. This substitution reduces signaling overhead while maintaining or improving channel estimation accuracy through optimized resource allocation.
Data Source
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AI summary
Disclosed is a method for signaling control information for coordinated multipoint (CoMP) transmission in a wireless communication system. The control information signaling method for CoMP transmission is performed by a base station and comprises providing, through RRC signaling, a terminal with setup information on each CSI-RS resource of a CoMP measurement group which is set in the terminal; and selectively providing, through DCI, the terminal with control information which indicates mapping of the PDSCH resource element corresponding to terminal and at least either pseudo-same positionality information of CSI-RS or pseudo-same positionality information of DM-RS. Thus, control information signaling for coordinated multipoint transmission can be efficiently performed.