MAC Layer Traffic Tunnel for Low Latency Wireless Routing
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Solution Overview
Problem
Existing IEEE 802.11 wireless networks face challenges in achieving end-to-end low latency and power savings, particularly in multi-interface devices, as they often require host processor and network stack involvement, leading to increased latency and power consumption during data transfer between devices.
Innovation Solution
Implementing a traffic tunnel that bypasses the host processor and network stack by directly routing packets between dual-band or virtual interfaces at the MAC layer, allowing for simultaneous dual band operation and power saving capabilities in IEEE 802.11 multi-interface devices, thereby reducing latency and conserving battery power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets are routed through the host processor and network stack, then network functionality and protocol handling are ensured, but latency increases and power consumption increases
Solution Approach 1:
The patent segments the network packet handling path into two separate paths: a standard path through the host processor for general network traffic, and a direct path through a dedicated network interface controller for time-sensitive traffic. This segmentation allows critical packets to bypass the host processor entirely, reducing latency while maintaining protocol handling capabilities for non-critical traffic.
Solution Approach 2:
The patent introduces a dedicated network interface controller as an intermediary component between the wireless interface and the host processor. This intermediary handles packet forwarding, protocol processing, and traffic management independently, allowing packets to be routed directly without requiring host processor intervention, thus reducing latency while ensuring reliable network functionality.
2Reliability
If packets are routed through the host processor and network stack, then comprehensive protocol processing is achieved, but power consumption increases
Solution Approach 1:
The patent segments power consumption across two components: the host processor handles protocol processing for non-time-critical traffic, while the dedicated network interface controller handles time-critical traffic independently. This allows the host processor to enter low-power states during periods of time-critical traffic, reducing overall power consumption while maintaining comprehensive protocol processing capabilities.
Solution Approach 2:
The dedicated network interface controller is designed to autonomously handle packet processing, filtering, and forwarding for time-sensitive traffic without requiring host processor involvement. This self-service capability reduces the computational burden on the host processor, enabling it to reduce power consumption while protocol processing continues through the independent controller.
3Adaptability or versatility
If dual-band operation is implemented, then connectivity versatility is improved, but device complexity increases
Solution Approach 1:
The patent merges the handling of dual-band wireless interfaces into a single dedicated network interface controller that can simultaneously manage both 2.4GHz and 5GHz bands. This consolidation approach maintains connectivity versatility across multiple bands while reducing device complexity by avoiding the need for separate processing paths for each band, as the unified controller handles all wireless interface operations independently of the host processor.
Data Source
AI summary
A communication circuitry includes a media access control including a first wireless interface and a second wireless interface. An application processor includes a network stack connected with the media access control. A communication packet is routed from the first wireless interface to the second wireless interface or from the second wireless interface to the first wireless interface without sending the communication packet to the network stack.