EDMG PPDU Format for Multi-User MIMO Data Alignment
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Solution Overview
Problem
Current wireless communication systems in the millimeter-wave band face challenges in efficiently transmitting high-speed data over directional multi-gigabit channels, particularly in supporting multiple user MIMO communications and ensuring data alignment across users, which limits data transmission rates and network capacity.
Innovation Solution
The implementation of an Enhanced Directional Multi-Gigabit (EDMG) Physical Layer Protocol Data Unit (PPDU) format, which includes advanced encoding schemes like LDPC encoding and channel bonding, enables efficient transmission over multiple spatial streams and aligns data fields across users, supporting higher data rates and multi-user MIMO communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional wireless communication protocols are used in millimeter-wave band, then system compatibility is maintained, but data transmission rates are limited and network capacity is insufficient
Solution Approach 1:
The PPDU format is segmented into distinct fields including legacy fields for compatibility and new fields for enhanced functionality. The data portion is divided into multiple spatial streams that can be independently processed and transmitted, enabling high-speed data transmission while maintaining system compatibility through structured segmentation.
Solution Approach 2:
The patent introduces spatial dimension by implementing multi-user MIMO communications with multiple spatial streams. Data is transmitted across multiple dimensions (spatial streams, users, frequencies) simultaneously, transforming the traditional single-dimension transmission into a multi-dimensional communication framework that achieves 30 Gbps transmission rates.
2Productivity
If multi-user MIMO communications are implemented, then network capacity increases, but data alignment across users becomes complex
Solution Approach 1:
The patent applies preliminary action by performing LDPC encoding and data padding before transmission to ensure all users' data fields are pre-aligned to the same length. This preprocessing step eliminates the need for complex real-time alignment during transmission, simplifying the multi-user MIMO communication process while maintaining high network capacity.
Solution Approach 2:
The patent changes the parameter of data field length by using LDPC encoding and adaptive padding to standardize the length of data fields across multiple users. This parameter transformation ensures that all users' data can be transmitted simultaneously without alignment issues, enabling efficient multi-user MIMO operations.
3Reliability
If advanced encoding schemes like LDPC are used, then data transmission reliability improves, but processing complexity increases
Solution Approach 1:
The patent merges LDPC encoding with data padding operations into a unified encoding process. By combining these functions, the system achieves reliable data transmission through LDPC while simultaneously ensuring data field alignment, reducing the overall processing complexity compared to implementing these as separate operations.
Data Source
AI summary
Some demonstrative embodiments include apparatuses, devices, systems and methods of communicating a Physical Layer Protocol Data Unit (PPDU). For example, an Enhanced Directional Multi-Gigabit (DMG) (EDMG) station (STA) may be configured to encode a Physical Layer (PHY) Service Data Unit (PSDU) of at least one user in an EDMG PHY Protocol Data Unit (PPDU) according to an EDMG Low-Density Parity-Check (LDPC) encoding scheme, which is based at least on a count of one or more spatial streams for transmission to the user; and transmit the EDMG PPDU in a transmission over a channel bandwidth in a frequency band above 45 Gigahertz (GHz).