MAC-Layer Transparent Transmission for Intelligent Cockpit Data
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Solution Overview
Problem
Existing data transmission methods in intelligent cockpits face inefficiencies due to complex protocol stack processing, failing to meet differentiated service transmission requirements of vehicular and non-vehicular devices, and resulting in low data transmission efficiency.
Innovation Solution
A data transmission method that simplifies processing at the MAC layers by using MAC layer transparency to transmit data directly between primary and secondary nodes, indicating service and resource information to facilitate efficient data transfer without additional header encapsulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional wireless communications protocol stack processing is used, then transmission requirements of different service types can be adapted, but processing steps become excessively complex and data transmission efficiency decreases
Solution Approach 1:
The patent extracts and removes the complex protocol stack processing steps from the data transmission path. By implementing MAC layer transparency, the protocol processing that was previously required at multiple layers (network layer, transport layer, etc.) is taken out and eliminated, leaving only essential MAC layer functions. This reduces processing complexity while maintaining the ability to handle different service types through simplified resource allocation and MAC layer control.
Solution Approach 2:
The patent segments the communication system into distinct functional components: a first communications apparatus (CDC), a second communications apparatus (in-vehicle device), and clearly defined MAC layer entities. By segmenting the protocol processing responsibilities and implementing transparency at the MAC layer, the system divides functionality to reduce overall complexity while preserving service differentiation capabilities through dedicated resource allocation for different service types.
2Adaptability or versatility
If conventional wireless communications protocol stack processing is used, then different service types can be supported, but data transmission efficiency becomes low
Solution Approach 1:
The patent extracts unnecessary protocol processing steps from the data transmission path, removing redundant encapsulation and decapsulation operations. By implementing MAC layer transparency, data can be transmitted directly at the MAC layer without traversing multiple protocol layers, significantly improving transmission efficiency while still supporting different service types through MAC layer resource allocation and control mechanisms.
3Reliability
If wired connection is used between CDC and vehicular device, then stable connection is achieved, but cable routing becomes difficult and space occupation problems occur
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless communication system. By using wireless communication between the CDC and in-vehicle devices, the physical cable routing problem is eliminated entirely. The wireless MAC layer transparent transmission mechanism provides connection stability equivalent to wired connections while removing all mechanical routing complexity and space occupation issues associated with cables.
Data Source
AI summary
A data transmission method, an apparatus, and a system are provided to optimize a data transmission manner in an intelligent cockpit scenario, and relate to the short-range communications field. In this application, a first communications apparatus may indicate, to a second communications apparatus, a first service and a first resource corresponding to the first service. When the second communications apparatus needs to send first data of the first service, a media access control layer of the second communications apparatus may transparently transmit the data of the first service. Correspondingly, when the first communications apparatus receives the first data of the first service, a media access control layer of the first communications apparatus transparently transmits the first data.