Downlink Quality Reporting via Random Access Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving downlink quality information, particularly in random access procedures and radio resource control connected states, which affects the performance of next-generation mobile communication systems requiring high throughput, low latency, and energy efficiency.
Innovation Solution
A method and apparatus for efficiently transmitting and receiving downlink quality information by using a physical uplink shared channel based on a random access response, including wideband downlink quality information and narrowband quality information, with frequency hopping configured for the physical downlink control channel, allowing for efficient channel quality measurement and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If downlink quality information is transmitted through traditional channels in random access procedure, then the random access procedure can be completed, but the transmission efficiency and accuracy of downlink quality information is insufficient
Solution Approach 1:
The patent combines downlink quality information transmission with the random access procedure by utilizing the physical uplink shared channel (PUSCH) that is already allocated for random access message transmission. Instead of using separate dedicated channels, the downlink quality information is merged into the existing random access messaging structure, thereby improving transmission efficiency without requiring additional resources.
Solution Approach 2:
The physical uplink shared channel is made multi-functional by enabling it to carry both random access messages and downlink quality information simultaneously. This universal usage of the PUSCH channel allows the system to achieve multiple objectives (random access completion and quality information reporting) through a single transmission mechanism, resolving the contradiction between efficiency and accuracy.
2Reliability
If frequency hopping is configured for physical downlink control channel, then frequency diversity gain is achieved, but the complexity of channel quality measurement increases
Solution Approach 1:
The patent segments the downlink quality information into wideband quality information and subband quality information. This segmentation allows the system to handle frequency hopping configurations efficiently by providing both overall wideband quality metrics and specific subband quality metrics, reducing the complexity of channel quality measurement while maintaining frequency diversity benefits.
Solution Approach 2:
The patent introduces subband quality information that provides localized quality measurements for specific frequency subbands. This local quality information complements the wideband quality information, enabling the system to manage the complexity of frequency hopping by providing granular quality data that can be used for targeted channel quality management without requiring complex overall analysis.
3Reliability
If wideband downlink quality information is transmitted, then frequency diversity is captured, but narrowband quality information for specific subbands is lost
Solution Approach 1:
The patent merges wideband downlink quality information and subband downlink quality information into a single transmission framework. By combining both types of quality information in the downlink quality report, the system simultaneously captures frequency diversity through wideband metrics and provides precise narrowband quality data for specific subbands, resolving the contradiction between capturing frequency diversity and maintaining narrowband measurement precision.
4Ease of operation
If random access procedure is used for initial access, then device can connect to network, but downlink quality information transmission is inefficient
Solution Approach 1:
The patent makes the random access procedure multi-functional by enabling it to serve both its traditional purpose of establishing initial network connection and the additional function of transmitting downlink quality information. Through this universal approach, the random access procedure efficiently handles both device connection and quality information transmission without requiring separate dedicated procedures, thereby improving overall transmission efficiency while maintaining ease of initial access.
Data Source
AI summary
The present invention relates to a method for transmitting and receiving downlink quality information in a wireless communication system and a device therefor. More particularly, the present invention relates to: a method comprising a step for transmitting and receiving a random access preamble, a step for transmitting and receiving a random access response on the basis of the random access response, and a step for transmitting and receiving the downlink quality information via a physical uplink shared channel on the basis of the random access response, wherein when frequency hopping is configured for a physical downlink control channel associated with the random access response, the downlink quality information includes information about wideband downlink quality; and a device therefor.