EDMG PPDU Structure for Millimeter-Wave Channel Bonding
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Solution Overview
Problem
Current wireless communication systems in the millimeter-wave band face challenges in achieving high data transmission rates and efficient beamforming training, particularly when using bonded channels, as existing protocols are not optimized for channel bonding, leading to suboptimal performance and increased complexity.
Innovation Solution
The implementation of an Enhanced Directional Multi-Gigabit (EDMG) Physical Layer Protocol Data Unit (PPDU) structure and Beam Refinement Protocol (BRP) packet structure that supports communication over bonded channels, allowing for efficient beamforming training by transmitting training fields using the entire bonded signal bandwidth, thereby addressing the limitations of existing protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing protocols are used for channel bonding, then compatibility with current systems is maintained, but data transmission rate and beamforming training efficiency are limited
Solution Approach 1:
The PPDU structure is segmented into distinct portions: a first portion transmitted in duplicate mode across multiple 2.16 GHz channels for robust header delivery, and a second portion transmitted over the bonded channel for high-rate data transfer. This segmentation allows optimization of different protocol elements for their specific functions while maintaining overall compatibility.
Solution Approach 2:
The protocol implements dynamic transmission modes by allowing the first portion of the PPDU to be transmitted in duplicate mode across multiple channels while the second portion uses the full bonded channel bandwidth. This dynamic approach enables the system to adapt transmission characteristics based on the specific needs of different data portions.
2Productivity
If training fields are transmitted using only a single channel, then protocol simplicity is maintained, but beamforming training efficiency is reduced
Solution Approach 1:
Multiple 2.16 GHz channels are merged into a single bonded channel for transmitting the second portion of the PPDU, including training fields. This merging enables the training fields to utilize the entire bonded signal bandwidth, significantly improving beamforming training efficiency while the duplicate transmission mode handles the complexity of coordination.
3Reliability
If duplicate mode transmission is used for the entire PPDU, then reliability is improved, but data transmission rate is reduced
Solution Approach 1:
The PPDU is divided into two portions with different transmission modes: the first portion (headers and control information) is transmitted in duplicate mode for reliability, while the second portion (data and training fields) is transmitted over the full bonded channel for high data rate. This segmentation optimizes both reliability and throughput.
Solution Approach 2:
Different transmission qualities are applied to different portions of the PPDU based on their specific requirements. Critical header information receives the higher reliability of duplicate transmission, while bulk data transmission utilizes the higher bandwidth of the bonded channel for maximum throughput.
Data Source
AI summary
Some demonstrative embodiments include apparatuses, devices, systems and methods of communicating an Enhanced Directional Multi-Gigabit (EDMG) Physical Layer Protocol Data Unit (PPDU). For example, an apparatus may include logic and circuitry configured to cause a wireless station to transmit a first portion of an EDMG PPDU in a duplicate mode including transmission of a plurality of duplicates of the first portion of the PPDU over a respective plurality of 2.16 Gigahertz (GHz) channels in a directional frequency band, the first portion of the EDMG PPDU including at least one header field of the EDMG PPDU; and to transmit a second portion of the EDMG PPDU over a signal bandwidth of a channel including the plurality of 2.16 GHz channels, the second portion of the EDMG PPDU including at least a Training (TRN) field of the EDMG PPDU.