Dual Mode MAP Messages for G.HN Network Registration
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Solution Overview
Problem
Devices joining a network may not know the regional frequency regulations, leading to unreliable decoding of media access plan (MAP) messages, which are crucial for network operation, and existing solutions result in degraded performance due to filtering of sub-carriers not allowed by regional regulations.
Innovation Solution
A central coordinator transmits both active and default MAPs, with active MAPs using regional and permanent masks, and default MAPs including regional mask information, allowing new devices to tune reception parameters and extract regional mask information for proper decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active MAPs are transmitted using regional masks to comply with regional frequency regulations, then regulatory compliance is improved, but new devices cannot decode these MAPs reliably because they lack regional mask information
Solution Approach 1:
The MAP transmission is segmented into two distinct types: default MAPs transmitted without regional masks that all devices can decode, and active MAPs transmitted with regional masks for regulatory compliance. This segmentation allows new devices to first acquire regional mask information from default MAPs, then properly decode subsequent active MAPs according to their region's frequency regulations.
Solution Approach 2:
Default MAPs are transmitted preliminarily to provide new devices with regional mask information before active MAPs are transmitted. This preliminary action ensures that when new devices join the network, they first receive the regional mask data they need to properly decode subsequent MAPs, eliminating the decoding reliability problem.
2Reliability
If sub-carriers not allowed by regional regulations are filtered out, then regulatory compliance is improved, but performance degrades due to loss of available transmission channels
Solution Approach 1:
The system applies different transmission qualities to different sub-carriers based on regional regulations. The regional mask selectively enables or disables specific sub-carriers according to local frequency regulations, allowing each region to optimize its transmission performance by utilizing only the sub-carriers permitted in that specific region while maintaining regulatory compliance.
3Reliability
If MAPs are transmitted repeatedly to ensure reception, then reception reliability is improved, but network efficiency decreases due to increased traffic
Solution Approach 1:
The system implements a self-service mechanism where new devices autonomously acquire regional mask information by decoding default MAPs, and existing devices continue to use their stored regional mask information to decode active MAPs. This eliminates the need for repeated MAP transmissions to ensure reception, as each device type has the appropriate information to decode MAPs successfully on first attempt, thereby maintaining network efficiency.
Data Source
AI summary
A method for a central coordinator of a network includes transmitting an active media access plan (MAP) using at least a regional mask and a bit allocation table (BAT) associated with the regional mask and transmitting a default MAP using only a permanent mask and a BAT associated with the permanent mask. The default MAP includes at least regional mask information.