Electronic Device Overlapping RU Transmission for Real-Time Traffic
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Solution Overview
Problem
Existing wireless communication technologies, such as Wi-Fi and 5G, suffer from increased transmission latency due to the need for devices to wait for a wireless medium to become available and perform random backoff, which is detrimental to real-time applications like augmented reality and robot control services.
Innovation Solution
An electronic device is configured to transmit real-time data frames through overlapping resource units during the transmission of non-real-time data frames, allowing immediate transmission of real-time data without waiting for the wireless medium to become available, using a protocol that includes piggybacking real-time data onto ongoing data transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CSMA/CA protocol is used for medium access control, then wireless medium sharing between devices is enabled, but transmission latency increases due to waiting for medium availability and random backoff
Solution Approach 1:
The patent segments the wireless medium access into two distinct paths: a contention-based path for non-real-time traffic using CSMA/CA, and a dedicated path for real-time traffic using immediate transmission on overlapping RUs. This segmentation allows real-time data to bypass the latency-inducing backoff mechanism while non-real-time data continues to use the shared medium access protocol.
Solution Approach 2:
The patent introduces a trigger frame as an intermediary mechanism that coordinates immediate transmission. The trigger frame carries information about upcoming real-time data transmissions, allowing receiving devices to prepare and preventing collisions, thus enabling low-latency transmission without requiring traditional medium sensing and backoff.
2Reliability
If devices wait for wireless medium to become available before transmission, then collision avoidance is achieved, but real-time data transmission is delayed
Solution Approach 1:
The patent employs preliminary action by sending trigger frames before actual real-time data transmission. These trigger frames reserve the medium for immediate transmission, allowing the system to maintain collision avoidance through coordination while eliminating the need for waiting and backoff, thus achieving both reliability and high transmission speed.
3Stability of the object's composition
If random backoff is performed before transmission, then medium access conflict is reduced, but transmission latency for real-time applications increases
Solution Approach 1:
The patent applies dynamics by making the transmission mechanism adaptive based on traffic type. Real-time traffic uses immediate transmission with trigger frame coordination, while non-real-time traffic uses traditional CSMA/CA with backoff. This dynamic approach allows the system to maintain medium access stability for general traffic while achieving low latency for time-critical applications.
Data Source
AI summary
An electronic device includes at least one wireless communication module at least one processor connected to the wireless communication module, and a memory connected to the processor and configured to store instructions executable by the processor. The processor is configured to, during transmission of a first data frame including first data through a first resource unit (RU) on a first time resource, in response to detecting second data being enqueued in a transmission queue, transmit a second data frame including the second data through a second RU on a second time resource overlapping the first time resource during the transmission of the first data frame, using the wireless communication module. The first data frame and the second data frame may be included in a physical layer protocol data unit, and a start time of the second time resource may be different from a start time of the first time resource.