Relay Protocol Stack Simplification for Low-Latency Communication
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Solution Overview
Problem
Existing relay communication systems suffer from excessive latency due to the inclusion of a complete communication protocol stack, which hinders low-latency communication requirements.
Innovation Solution
The relay device's protocol stack is simplified to include a physical layer, media access control layer, and optional segmentation or resegmentation functions of the radio link control layer, or hybrid automatic repeat request functions, reducing data packet processing complexity and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complete communication protocol stack is used in the relay device, then communication reliability is improved, but transmission latency increases
Solution Approach 1:
The relay device's protocol stack is segmented into essential components only (physical layer, media access control layer, and selective radio link control layer functions), removing unnecessary higher-layer protocols. This segmentation maintains sufficient communication reliability for relay operations while significantly reducing processing latency by eliminating redundant protocol layers.
Solution Approach 2:
Unnecessary protocol layers and functions are extracted and removed from the relay device's protocol stack. Only the minimal required functions for reliable relay communication are retained, achieving low latency while preserving essential communication reliability through careful selection of retained components.
2Adaptability or versatility
If a complete communication protocol stack is used in the relay device, then protocol functionality is improved, but device complexity increases
Solution Approach 1:
The protocol stack is segmented to include only essential layers (physical layer, media access control layer) and selective radio link control functions. This segmentation maintains sufficient protocol functionality for relay operations while dramatically reducing device complexity by eliminating unnecessary higher-layer protocols.
Solution Approach 2:
Instead of implementing the complete protocol stack, only the partial set of essential protocol functions are implemented in the relay device. This partial action approach provides sufficient functionality for relay communication while avoiding the complexity overhead of full protocol implementation.
Data Source
AI summary
A relay device first receives a data packet from a network device through a first link, and sends the data packet to user equipment through a second link. A protocol stack of the relay device consists of a physical layer, a media access control layer, and a segmentation function or a resegmentation function of a radio link control layer; a protocol stack of the relay device consists of a physical layer, a media access control layer, a segmentation function or a resegmentation function of a radio link control layer, and an adaptation layer; or a protocol stack of the relay device consists of a physical layer and a hybrid automatic repeat request function of a media access control layer. The first link is a wireless communication link between the network device and the relay device, and the second link is a wireless direct communication link between the relay device and the user equipment.