Terminal DRX Signaling During Non-Active Time Windows
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Solution Overview
Problem
The challenge of signal transmission between a terminal and a network device arises when cell DRX active time does not completely overlap cell DTX active time and/or C-DRX active time, leading to inefficiencies and increased power consumption.
Innovation Solution
The terminal is configured to send HARQ-ACK information and/or scheduling requests (SR) within the DRX non-active time of a cell, and receive downlink control information within the DTX non-active time, without waiting for the next active cycle, using predefined or network-indicated time periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the terminal waits for DRX active time to send uplink information, then power consumption is reduced, but transmission delay increases
Solution Approach 1:
The terminal is configured with multiple uplink resources in advance (including those during DRX non-active time), so when uplink information needs to be sent, the terminal can immediately use the appropriate resource without waiting for DRX active time, thereby reducing transmission delay while maintaining power savings
2Adaptability or versatility
If cell DRX and cell DTX are independently configured, then flexibility in configuring each mechanism is improved, but overlap between active times cannot be guaranteed
Solution Approach 1:
The patent introduces dynamic adjustment mechanisms where the network can configure multiple DRX parameters (short cycle, long cycle, switching conditions) and the terminal can adaptively switch between different DRX configurations based on traffic patterns, allowing the system to maintain both configuration flexibility and reliable active time overlap dynamically
Solution Approach 2:
The patent changes DRX parameter values (cycle lengths, active time durations, switching thresholds) to optimize the overlap between cell DRX and cell DTX active times, thereby maintaining configuration flexibility while ensuring reliable signal transmission windows
3Reliability
If the terminal sends information only during DRX active time, then power consumption is reduced, but transmission reliability deteriorates when active times do not overlap
Solution Approach 1:
The network pre-configures multiple uplink resources including those during DRX non-active time, so the terminal can reliably transmit uplink information immediately when needed without waiting for DRX active time, improving transmission reliability while maintaining power efficiency
Solution Approach 2:
The patent introduces an intermediary mechanism where the network configures and manages multiple DRX parameter sets and uplink resources, acting as a mediator between the terminal's power saving needs and the network's requirement for reliable signal transmission during non-overlapping active times
Data Source
AI summary
A communication method includes a terminal that receives first configuration information from a network device, where the first configuration information may include discontinuous reception (DRX) configuration information of a first cell, and the DRX configuration information of the first cell indicates DRX non-active time of the first cell. If the terminal is within the DRX non-active time of the first cell when needing to send first information, the terminal may not be constrained by DRX of the first cell, and the terminal may send, in the first cell, the first information within the DRX non-active time of the first cell, where the first information includes hybrid automatic repeat request-acknowledgment (HARQ-ACK) information and/or a scheduling request (SR).