MBSFN Feedback Reporting via CRS Position
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Solution Overview
Problem
In wireless communication systems, particularly in MBSFN transmission, there is a lack of effective methods for reporting feedback information, which hinders the optimization of signal strength and interference measurement across multiple cells, leading to suboptimal data transmission and reception.
Innovation Solution
A method for user equipment to receive configuration information for feedback information of MBSFN transmission and transmit feedback based on the position of a common reference signal (CRS) of an antenna port 0 in an interference cell, using specific symbols within an MBSFN subframe, to determine the received signal strength indicator (RSSI) accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If feedback information reporting methods are not established for MBSFN transmission, then system complexity remains low, but measurement precision of signal strength and interference is insufficient
Solution Approach 1:
The patent changes the measurement parameters by specifying exact resource regions (symbols 2-5 in first slot, symbols 0-5 in second slot) and frequency bands for MBSFN RSSI measurement. This standardized parameter selection improves measurement precision while keeping the implementation complexity manageable through clear specifications.
Solution Approach 2:
The patent introduces configuration information as an intermediary that carries measurement resource region indicators from the network to the user equipment. This intermediary structure enables precise measurement without requiring complex direct coordination, as the configuration information serves as a standardized interface for specifying measurement parameters.
2Productivity
If feedback information is not reported for MBSFN transmission, then device operation remains simple, but data transmission efficiency is suboptimal
Solution Approach 1:
The patent segments the feedback information into distinct components: configuration information reception, measurement resource region identification, MBSFN RSSI measurement, and feedback reporting. This segmentation allows the system to achieve improved data transmission efficiency through comprehensive feedback while keeping each operational step simple and well-defined.
Solution Approach 2:
The patent implements preliminary action by having the user equipment receive and store configuration information before performing measurements. This preliminary configuration step enables the subsequent measurement and feedback processes to proceed efficiently without requiring complex real-time decision-making, thus improving data transmission efficiency while maintaining ease of operation.
3Measurement precision
If interference measurement is not performed in MBSFN areas, then system operation remains simple, but signal quality assessment is insufficient
Solution Approach 1:
The patent applies local quality by specifying measurements in particular local resource regions (specific symbols and slots within MBSFN subframes) rather than requiring comprehensive system-wide measurements. This localized measurement approach achieves sufficient signal quality and interference assessment precision while avoiding the complexity of full-system measurement and reporting.
Data Source
AI summary
A method is provided for reporting feedback information of Multicast-Broadcast Single-Frequency Network (MBSFN) transmission by a user equipment in a wireless communication system. The user equipment receives configuration information for feedback information of the MBSFN transmission when the user equipment receives signals from a plurality of base stations based on the MBSFN transmission, and transmits the feedback information measured in a resource region according to the configuration information. The user equipment receives a common reference signal (CRS) of an antenna port 0 of an interference cell from the interference cell in an MBSFN area, and the feedback information is measured in the resource region considering a position of a symbol allocated the CRS of the antenna port 0 of the interference cell.