DRX Packet Scheduling for Selective Carrier Wake-Up
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Solution Overview
Problem
Existing packet scheduling methods do not address the need for efficient DRX packet scheduling in carrier aggregation scenarios, particularly for discontinuous carrier aggregation where different radio frequency chains are required for primary and secondary cells, leading to unnecessary power consumption and inefficiency.
Innovation Solution
A packet scheduling method that includes receiving and sending indication information to user equipment to selectively wake up either the primary cell or secondary cell, or both, based on data transmission needs, using RRC signaling, MAC control elements, or DCI messages, with the option to enable cross-carrier scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all transceiver antennas are activated for carrier aggregation communication, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic activation of transceiver antennas based on DRX cycle phases and data transmission requirements. During DRX sleep periods, antennas are deactivated to save power; during active periods or when data transmission is detected, antennas are activated to ensure reliable communication. This dynamic switching resolves the contradiction by adapting system state to operational needs.
Solution Approach 2:
The patent segments the carrier aggregation system into independently controllable transceiver antenna groups corresponding to different cells (primary cell and secondary cells). This allows selective activation of only the necessary antennas for current communication needs, rather than keeping all antennas continuously active, thus reducing power consumption while maintaining required communication reliability.
2Productivity
If DRX packet wake-up is triggered for data transmission, then communication efficiency is improved, but unnecessary power consumption occurs when no data transmission is needed
Solution Approach 1:
The patent implements a feedback mechanism where the network device monitors data transmission status and sends indication information to the terminal device. When data transmission is detected, the network device triggers a DRX packet wake-up by sending indication information, which prompts the terminal to activate transceiver antennas. This feedback loop ensures wake-up occurs only when necessary, preventing unnecessary power consumption while maintaining communication efficiency.
Solution Approach 2:
The patent uses preliminary action by configuring DRX parameters and indication information in advance through RRC signaling or MAC control elements. The terminal device is pre-configured with DRX cycles and wake-up conditions, allowing it to enter low-power state proactively while being prepared for quick activation when data transmission is detected, thus balancing efficiency and power consumption.
3Adaptability or versatility
If indication information is sent via RRC signaling or MAC control elements, then scheduling flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by using different indication methods based on specific scenarios. RRC signaling or MAC control elements are used selectively for configuring DRX parameters and sending indication information only when necessary, rather than continuously. This reduces signaling overhead while maintaining scheduling flexibility where needed, avoiding excessive signaling in routine operations.
Data Source
AI summary
A packet scheduling method includes: receiving, by user equipment, first indication information sent by a network device, wherein the first indication information is configured to indicate a discontinuous reception (DRX) packet which needs to be woken up by the user equipment due to trigger of data transmission.