Coordinated Carrier Transmission Control With Unified CSI Processes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The limitation of five CSI processes per component carrier in joint CA and CoMP operation restricts the simultaneous support of different CoMP schemes and increases UE complexity, leading to suboptimal performance in LTE Advanced systems.
Innovation Solution
A network node and mobile device configuration that allows for combined measurements across multiple transmission points, associating each CSI process with multiple carriers and IMRs, enabling efficient CSI feedback and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the system supports multiple CoMP schemes simultaneously with five CSI processes per component carrier, then the versatility of CoMP operation is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by enabling each CSI process to serve multiple functions: it can be associated with multiple carriers and multiple IMRs, allowing a single CSI process to support multiple CoMP schemes (joint transmission, dynamic point selection, coordinated scheduling/beamforming) simultaneously. This multi-functional design reduces the need for separate CSI processes for each scheme, thereby reducing UE complexity while maintaining versatility
2Productivity
If the system associates each CSI process with multiple carriers and IMRs, then the productivity of CSI feedback is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple configurations into a unified CSI process structure. By combining multiple carriers and multiple IMRs under a single CSI process, the system reduces the total number of CSI processes needed. This merging approach improves productivity by enabling more efficient resource utilization and reduced signaling overhead, while the standardized merging methodology keeps configuration complexity manageable
3Loss of information
If the system uses a limited number of CSI processes, then the loss of information is reduced, but the adaptability for different CoMP schemes decreases
Solution Approach 1:
By making each CSI process universal and capable of associating with multiple carriers and IMRs, the patent enables a limited number of CSI processes to cover multiple CoMP schemes. This multi-functionality ensures that no information is lost regarding channel state and interference measurements across different schemes, while keeping signaling overhead low due to the reduced number of CSI processes required
Data Source
AI summary
The invention provides a communication system and components thereof for controlling coordinated transmissions using a plurality of carriers operated by a plurality of transmission points. A transmission point configures a number of signal quality and interference measurements for a mobile telephone communicating over the plurality of carriers, each measurement being associated with multiple carriers and multiple measurement configurations. The mobile telephone performs the configured measurements with respect to each of the multiple carriers and reports the results of the relevant measurements to the transmission point.