DRX Scheduling for Multicast HARQ Feedback Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multicast service solutions in 5G and future communication systems suffer from low reliability, and introducing multicast HARQ feedback affects conventional receiving mechanisms, necessitating improved reliability and accuracy in scheduling information reception.
Innovation Solution
A communication method involving a terminal device that sends feedback information, determines DRX configuration, and receives scheduling information based on DRX configuration, including HARQ RTT timers and RNTIs for multicast and unicast services, to enhance accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multicast HARQ feedback is introduced to improve reliability, then reliability of multicast service is improved, but conventional receiving mechanisms are affected and implementation complexity increases
Solution Approach 1:
The patent segments the DRX configuration into separate multicast-specific DRX configuration and unicast DRX configuration. The terminal device determines scheduling information reception based on these segmented configurations, allowing independent optimization of multicast and unicast mechanisms while maintaining overall system reliability without excessive complexity.
Solution Approach 2:
The patent applies local quality by providing dedicated DRX configuration parameters specifically for multicast services (including multicast HARQ feedback) while maintaining separate unicast DRX configuration. This allows each service type to have optimized parameters tailored to its specific requirements, improving reliability without forcing complex changes across the entire receiving mechanism.
2Measurement precision
If DRX configuration information is determined based on feedback information, then accuracy of receiving scheduling information is improved, but time delay increases
Solution Approach 1:
The patent implements preliminary action by having the terminal device determine DRX configuration information in advance based on feedback information before the actual scheduling information reception. The terminal device starts relevant timers (such as HARQ RTT timer and DRX retransmission timer) based on this pre-determined configuration, ensuring accurate and timely reception without additional delay.
Solution Approach 2:
The patent utilizes feedback mechanisms where the terminal device sends feedback information to the network device, and the network device adjusts scheduling based on this feedback. The terminal device then determines appropriate DRX configuration based on this feedback loop, improving accuracy while managing time delay through efficient feedback timing.
Data Source
AI summary
The present invention discloses a communication method and an apparatus. One example method includes: sending feedback information of a first data packet of a first multicast service; receiving discontinuous reception (DRX) configuration information corresponding to a first unicast service, the DRX configuration information corresponding to the first unicast service comprises duration of a second downlink hybrid automatic repeat request round trip time timer (HARQ RTT) timer and duration of a second downlink DRX retransmission timer, a data packet of the first unicast service is scrambled by cell radio network temporary identifier (C-RNTI); starting the second downlink HARQ RTT timer at a first moment after an end of sending the feedback information; and receiving based on the first unicast service scheduling information by the C-RNTI.