Wireless Data Delivery Timing via Indication Information
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Solution Overview
Problem
In wireless communication systems, the indeterminacy of transmission latency between transmit and receive end devices complicates the accurate timing of actions performed by the receive end device, as opposed to wired systems where latency is fixed, making it difficult to design operation instructions that ensure timely execution.
Innovation Solution
The method involves determining a specific moment or period when the receive end device needs to deliver data to its upper protocol layer and sending indication information from the transmit end device to instruct the receive end device on this timing, allowing it to perform actions accordingly, thereby mitigating the impact of transmission latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless transmission manner is used to replace wired transmission, then flexibility and cost of device layout are improved, but transmission latency becomes indeterminate, making it difficult to accurately predict action execution time
Solution Approach 1:
The transmit end device determines a first moment (a future time point) in advance and sends first indication information to the receive end device, instructing it to deliver data to the upper layer at that predetermined moment. This preliminary planning of the delivery timing allows the system to account for wireless transmission latency variability and ensure data is ready when needed, resolving the contradiction between wireless flexibility and timing predictability
2Reliability
If transmit end device waits for receive end device to confirm data reception before sending next data, then data delivery reliability is improved, but transmission efficiency deteriorates due to increased round-trip time
Solution Approach 1:
The transmit end device sends first indication information in advance that specifies a future first moment for data delivery. This allows the receive end device to prepare and deliver data at the predetermined time without requiring immediate confirmation from the transmit end, enabling continuous transmission while maintaining reliability through advance scheduling
3Speed
If receive end device delivers data to upper layer immediately upon reception, then processing speed is improved, but timing accuracy of action execution deteriorates due to transmission latency variability
Solution Approach 1:
Instead of immediately delivering data upon reception, the receive end device stores the received data and waits until the first moment specified in the first indication information. This preliminary storage followed by timed delivery ensures that actions are executed at the precisely intended time, maintaining both processing speed and timing accuracy
Solution Approach 2:
The first indication information serves as feedback from the transmit end device to the receive end device, specifying the exact moment when data should be delivered to the upper layer. This feedback mechanism allows the receive end to adjust its delivery timing based on the transmit end's requirements, ensuring synchronized action execution despite wireless latency variability
Data Source
AI summary
This application provides a communication method and a communications apparatus. The communication method includes: determining, by a transmit end device, a first moment, where the first moment is a moment when a receive end device needs to deliver first data to an upper layer of a communications protocol layer of the receive end device; and sending, by the transmit end device, first indication information and the first data, where the first information is used to instruct the receive end device to deliver the first data to the upper layer of the communications protocol layer of the receive end device at the first moment. The receive end device can be supported in determining the first moment based on the first indication information and delivering the first data to the upper layer of the communications protocol layer at the first moment.