Mobile Station Channel State Feedback Encoding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation communication systems, the efficiency of resource use is compromised due to the increasing amount of feedback information required for channel state information (CSI) transmission, particularly as the number of mobile stations (MSs) increases, leading to reduced resource utilization.
Innovation Solution
A method where mobile stations (MSs) measure channel states and encode CSI using schemes corresponding to the adaptive modulation and coding (AMC) levels, transmitting the encoded information to the base station (BS) using either an Indicator/Position code or a Differential/Grouped code, reducing the amount of data required for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel state information is transmitted for all allocated channels, then channel state monitoring is complete, but resource use efficiency deteriorates due to excessive feedback information
Solution Approach 1:
The patent extracts only the essential channel state information corresponding to allocated channels from the complete set of possible channel states. By identifying and transmitting only the CSI for channels that are actually allocated to the mobile station, the system eliminates unnecessary feedback information while maintaining complete monitoring of relevant channels, thus resolving the contradiction between measurement precision and resource efficiency.
Solution Approach 2:
The patent applies partial action by transmitting channel state information only for a subset of allocated channels rather than all possible channels. This selective transmission approach ensures that sufficient CSI is provided for resource allocation decisions while avoiding the excessive transmission of complete channel state information, thereby improving resource use efficiency without compromising measurement precision for the necessary channels.
2Productivity
If feedback information amount is reduced, then resource use efficiency improves, but channel state information completeness deteriorates
Solution Approach 1:
The patent applies local quality by transmitting channel state information with differentiated precision and completeness based on the specific characteristics of each allocated channel. Rather than uniformly transmitting complete CSI for all channels, the system adjusts the level of detail transmitted for each channel based on its allocation status and importance, ensuring information completeness for critical channels while reducing feedback for less critical ones, thus balancing resource efficiency with information completeness.
3Loss of information
If all channel state information is transmitted, then information completeness is maintained, but data transmission amount increases
Solution Approach 1:
The patent extracts and transmits only the necessary channel state information corresponding to allocated channels, eliminating redundant information for unallocated channels. This extraction approach maintains information completeness for the channels that matter while significantly reducing the overall data transmission amount, directly resolving the contradiction between information completeness and data quantity.
Solution Approach 2:
The patent segments the channel state information transmission into distinct portions for different channel groups. By dividing the complete CSI into segments corresponding to different allocated channels and transmitting only the relevant segments, the system maintains completeness for necessary information while reducing the total data transmission amount, effectively resolving the contradiction between information completeness and data quantity.
Data Source
AI summary
A method is provided for transmitting/receiving data in a communication system. The method includes measuring, by a Mobile Station (MS), states of channels which are allocated in a scheme prearranged with a Base Station (BS), and encoding measured channel state information in a scheme corresponding to an allocation scheme of the allocated channels; and configuring a message including the encoded channel state information, and transmitting the configured message to the BS.