CoMP Feedback Process Interdependency via Reference Relationships
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Solution Overview
Problem
Existing coordinated multi-point transmission systems face challenges in establishing interdependency between multiple feedback processes, leading to inefficiencies in channel state information feedback and increased computational complexity.
Innovation Solution
A method where a process reference relationship between configured processes is determined from configuration information transmitted by a base station, allowing parameters to be shared between processes, enabling PMI/RI information sharing under different interference assumptions and establishing interdependency between feedback processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple feedback processes are configured independently for different CoMP transmission schemes, then comprehensive channel state information can be obtained for various transmission points and interference assumptions, but the device complexity and computational overhead increase significantly
Solution Approach 1:
The patent merges multiple independent feedback processes into a unified feedback framework by establishing reference relationships between them. Specifically, it combines the feedback processes for different CoMP transmission schemes (e.g., DPS, DPB, JT) into a coordinated system where feedback reports share common parameters and reference the same measurement configurations, thereby reducing overall system complexity while maintaining comprehensive channel state information collection
Solution Approach 2:
The patent implements universality by designing a common feedback report structure that serves multiple transmission schemes simultaneously. The feedback report is configured to include parameters that are universally applicable across different CoMP schemes, allowing a single feedback mechanism to support multiple transmission modes (single-point, multi-point, dynamic point selection) without requiring separate independent feedback processes for each scheme
2Measurement precision
If separate feedback reports are generated for each transmission scheme with full parameters, then accurate channel state information is available for each scheme, but the feedback overhead and processing time increase
Solution Approach 1:
The patent extracts and identifies common parameters that are shared across different feedback processes for various CoMP transmission schemes. By separating the common elements (such as reference signal configurations, measurement resource indicators, and baseline channel state parameters) from the scheme-specific parameters, the system can generate streamlined feedback reports that maintain accuracy for each transmission scheme while avoiding redundant information transmission and processing
Solution Approach 2:
The patent performs preliminary configuration of feedback report structures and parameter mappings before actual feedback transmission. The network configures the UE with template definitions that pre-establish which parameters are shared across schemes and which are scheme-specific, allowing the UE to efficiently generate feedback reports by filling in measured values into pre-defined templates rather than constructing complete reports from scratch for each transmission scheme
3Measurement precision
If independent measurement sets are configured for each transmission scheme, then scheme-specific channel measurements are accurate, but the interdependency between feedback processes cannot be established
Solution Approach 1:
The patent introduces a new dimension of organization by establishing hierarchical reference relationships between feedback processes. Instead of treating all feedback processes as independent parallel entities, it creates a multi-level structure where feedback reports are organized in terms of their reference relationships (which process they reference and which reference them), enabling the system to maintain scheme-specific measurement accuracy while simultaneously establishing interdependencies across different transmission schemes through this reference dimension
Data Source
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AI summary
The present invention relates to the field of communications. Disclosed are a CoMP transmission feedback method, device and system, the method comprising: determining an inter-mode reference relationship between at least two configured modes according to configuration information transmitted by a base station (s101); at each feedback instance, determining the parameter in the current mode via the parameter in a reference mode and according to the reference relationship between modes (s102); and feeding back the channel state information containing the parameter in the current mode according to the configuration of the current mode (s103). The present invention realizes the sharing of pre-coding matrix indicator/rank indicator (PMI/RI) information among a plurality of channel quality indicators (CQIs) having different interference assumptions, and realizes the sharing of RI information among different transmission points, thus achieving a dependency relationship among a plurality of feedback modes.