Wireless Device Scheduling Mode Switching for Latency and Power Trade-offs
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Solution Overview
Problem
Current wireless communications networks face challenges in efficiently supporting a wide range of devices with diverse data traffic profiles, particularly in achieving low latency and high reliability for services like Ultra Reliable Low Latency Communications (URLLC), due to issues with downlink control information decoding and resource allocation in 5G and LTE systems.
Innovation Solution
The implementation of a method where communications devices can switch between cross-slot and same-slot scheduling modes based on DCI signaling, allowing for improved power management and reliable data transmission by correctly decoding downlink control messages and allocating resources, thereby enhancing the reception of downlink data in wireless communications networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If same-slot scheduling mode is used, then latency is reduced, but power consumption increases
Solution Approach 1:
The patent implements dynamic mode switching between same-slot and cross-slot scheduling based on real-time DCI signaling. The communications device can adaptively change its reception mode (first format for same-slot, second format for cross-slot) according to network conditions and service requirements, allowing the system to optimize between latency and power consumption dynamically rather than being fixed in one mode
Solution Approach 2:
The patent changes the parameter of scheduling mode (same-slot vs cross-slot) and reception format based on DCI indications. By modifying these operational parameters dynamically, the system can achieve low latency when needed (same-slot mode) while conserving power during normal operations (cross-slot mode), directly addressing the contradiction between speed and energy consumption
2Use of energy by moving object
If cross-slot scheduling mode is used, then power consumption is reduced, but latency increases
Solution Approach 1:
The system dynamically switches between cross-slot and same-slot scheduling modes based on DCI signaling. When URLLC services or low-latency applications are detected, the system transitions to same-slot mode to reduce latency, while maintaining cross-slot mode for power-efficient operation during standard traffic conditions
Solution Approach 2:
The patent modifies the scheduling mode parameter (cross-slot vs same-slot) and reception format parameter based on network signaling. This allows the system to achieve power efficiency through cross-slot scheduling during normal operations while being capable of rapid transition to low-latency mode when service requirements demand it
3Adaptability or versatility
If mode switching is implemented, then adaptability to different traffic profiles is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal reception mechanism that can handle both same-slot and cross-slot scheduling modes through a single configurable framework. The communications device uses a unified reception procedure that adapts its format (first or second format) based on DCI indications, eliminating the need for separate dedicated receivers for each mode and reducing overall device complexity while maintaining high adaptability
Solution Approach 2:
The system uses DCI signaling as feedback from the network to indicate the appropriate scheduling mode and reception format. This feedback mechanism allows the device to automatically adapt to different traffic profiles (eMBB, URLLC, mMTC) without complex local decision-making logic, reducing device complexity while maintaining high adaptability to diverse service requirements
Data Source
AI summary
A method of receiving data by a communications device in a wireless communications network, the method comprising receiving a downlink control message transmitted in first downlink communications resources of a wireless access interface provided by the wireless communications network, the downlink control message providing an indication of second downlink communications resources from which the communications device can receive downlink data, and receiving the downlink data from the second downlink communications resources, wherein the communications device is configured to operate in a first reception mode in which a receiver of the communications device is configured to receive the downlink data transmitted according to a first format via the second downlink communications resources, or to operate in a second reception mode in which the receiver of the communications device is configured to receive the downlink data transmitted according to a second format via the second downlink communications resources.