Wake-Up Frame Transmission via EDCA Parameter Prioritization
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Solution Overview
Problem
Current methods for transmitting wake-up frames in low power wake-up receiver systems do not ensure high quality of service (QoS) performance, leading to potential latency and inefficiencies in communication due to the lack of a standardized approach for channel resource management and timing synchronization.
Innovation Solution
The proposed method involves determining an Enhanced Distributed Channel Access (EDCA) parameter set for wake-up frames to assess channel resource availability and prioritize channel contention, along with sending indication information to synchronize the transmission time, ensuring that wake-up frames are sent when the channel is idle and received accurately by the second device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a low power wake-up receiver is added to enable sleep mode operation, then power consumption is reduced, but channel access priority and QoS performance deteriorate
Solution Approach 1:
The system is divided into two independent transceiver paths: a low-power WUR path for wake-up frame reception and a primary transceiver path for data communication. This segmentation allows the WUR to operate independently with simplified channel access while the primary transceiver maintains full QoS capabilities, resolving the contradiction between power savings and service quality.
Solution Approach 2:
The WUR performs preliminary channel sensing and wake-up frame reception before the primary transceiver activates. By detecting wake-up frames in advance during sleep mode and preparing the device for wake-up, the system ensures that when the primary transceiver becomes active, it can immediately engage in high-priority channel access and data transmission, thus maintaining QoS performance while saving power during idle periods.
2Reliability
If the WUR continuously monitors the channel for wake-up frames, then wake-up reliability is improved, but power consumption increases
Solution Approach 1:
The WUR monitors the channel periodically at predetermined wake-up intervals rather than continuously. During each monitoring period, the WUR listens for wake-up frames, then returns to sleep mode. This periodic monitoring approach maintains wake-up reliability by ensuring the WUR checks for incoming frames at regular intervals while dramatically reducing power consumption compared to continuous monitoring.
3Loss of time
If the primary transceiver wakes up frequently to check for data, then data transmission timeliness is improved, but power consumption increases
Solution Approach 1:
The WUR acts as an intermediary between the external network and the primary transceiver during sleep mode. It receives and buffers wake-up frames, then triggers the primary transceiver to wake up only when necessary. This intermediary function eliminates the need for the primary transceiver to frequently wake up and check for data, as the WUR handles preliminary communication tasks, thereby reducing latency while maintaining low power consumption.
4Speed
If EDCA parameter sets are optimized for high priority channel access, then channel access speed is improved, but channel contention complexity increases
Solution Approach 1:
Different EDCA parameter sets are configured for different channel access scenarios: the WUR uses simplified parameters optimized for wake-up frame reception, while the primary transceiver uses comprehensive EDCA parameters for data communication. This local quality optimization allows each component to have tailored channel access characteristics without requiring the entire system to handle full complexity, thus improving channel access speed while managing contention complexity.
Data Source
AI summary
Embodiments of this application provide a wake-up frame transmission method and devices. The method includes: determining, by a first device, an enhanced distributed channel access (EDCA) parameter set of a wake-up frame, where the wake-up frame is used to wake up one or more second devices to receive a data frame; determining, by the first device based on the EDCA parameter set of the wake-up frame, whether a channel resource is in an idle state; and sending, by the first device, the wake-up frame to the second device when the channel resource is in the idle state. In the embodiments of this application, the first device can perform channel resource contention based on the EDCA parameter set corresponding to the wake-up frame, so that a service of a high priority can be obtained by transmitting a wake-up frame of a high priority, thereby improving QoS performance of the wake-up frame.