WiGig PPDU Bandwidth Duplication for Legacy-Compatible Throughput
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Solution Overview
Problem
Next Generation 60 GHz (NG60) WiGig devices need to maintain compatibility with legacy devices while achieving higher transmission speeds by supporting both Legacy Format (LF) and Mixed Format (MF) Physical Layer Convergence Protocol Data Units (PPDUs) using variable channel bandwidths to enhance transmission efficiency.
Innovation Solution
The solution involves configuring non-legacy A-PPDU transmission devices and methods that allow for the transmission of MF PPDUs using standard and variable channel bandwidths, optimizing the structure and formatting of headers and data fields to maximize efficiency, including the use of duplicating units and GI insertion to maintain interference avoidance and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If NG60 WiGig devices support variable channel bandwidth to achieve higher transmission speeds, then transmission efficiency is improved, but compatibility with legacy devices is compromised
Solution Approach 1:
The patent segments the PPDU structure into distinct fields (legacy header field and non-legacy header field) that can be independently configured. The legacy header field maintains compatibility with legacy devices while the non-legacy header field enables variable channel bandwidth support for NG60 devices, allowing both requirements to coexist in the same transmission frame.
Solution Approach 2:
The patent creates a universal PPDU format that serves multiple functions: the legacy header field ensures compatibility with legacy WiGig devices while the non-legacy header field enables advanced features for NG60 devices. This multi-functional structure allows a single transmission system to serve both legacy and next-generation devices simultaneously.
2Reliability
If Guard Interval (GI) is added to all PPDU fields to avoid interference, then interference avoidance is improved, but power consumption increases
Solution Approach 1:
The patent applies different GI configurations to different fields within the PPDU structure. Specifically, GI is selectively added to the non-legacy header field based on channel conditions and transmission requirements, while the legacy header field uses standard GI configuration. This localized approach ensures interference avoidance where needed while minimizing unnecessary power consumption.
Solution Approach 2:
Instead of adding GI to all fields unconditionally, the patent implements partial action by adding GI only to specific fields (non-legacy header) under specific conditions. This reduces the excessive action of universally applying GI to all PPDU fields, thereby lowering power consumption while maintaining sufficient interference avoidance.
Data Source
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AI summary
In a transmission device a duplicating unit duplicates, out of first physical layer convergence protocol data units (PPDUs) an (N - 1) count (where in N is an integer of 2 or greater) of a first PPDU transmitted at a standard channel bandwidth, in a frequency axis direction. A GI insertion unit adds a guard interval to each of the first PPDU transmitted at the standard channel bandwidth, the duplicated first PPDU transmitted at the standard channel bandwidth, a first PPDU, out of the first PPDUs, transmitted at a variable channel bandwidth that is N times the standard channel bandwidth, and a second PPDU transmitted at the variable channel bandwidth, and outputs as an aggregate physical layer convergence protocol data unit (A-PPDU). An RF frontend transmits the A-PPDU.