Relay Node Multiplexed Transmission for Wi-Fi 8 Latency Reduction
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Solution Overview
Problem
In wireless communication systems, particularly with Wi-Fi 8 relay nodes, the efficiency decreases and latency increases when the first and second hops operate on the same band, leading to significant overheads and reduced throughput due to the need for multiple physical layer protocol data units and acknowledgments in 2-hop relay scenarios.
Innovation Solution
Implementing multiplexed transmission and reception techniques where the Relay node sends messages to both the Access Point and the Station simultaneously in a single Physical Layer Protocol Data Unit (PPDU), reducing overheads by eliminating the need for separate acknowledgments and preambles in each hop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate acknowledgments and preambles are used in each hop, then reliable communication is ensured, but communication overhead increases and throughput decreases
Solution Approach 1:
The patent combines the first-hop acknowledgment and the second-hop data transmission into a single multiplexed PPDU. The relay node transmits both the acknowledgment for the first hop and the data for the second hop simultaneously in one physical layer protocol data unit, eliminating the need for separate transmissions and reducing overhead.
Solution Approach 2:
The patent introduces a multiplexing dimension that allows simultaneous transmission of multiple messages across different hops within a single time slot. By using multiplexed PPDUs, the system transitions from sequential hop-by-hop communication to parallel multi-hop communication, effectively adding a temporal and structural dimension to the data transmission.
2Productivity
If multiple physical layer protocol data units are used for 2-hop relay, then complete message transmission is achieved, but latency increases and efficiency decreases
Solution Approach 1:
The multiplexed transmission enables continuous and overlapping communication actions across multiple hops. The relay node can transmit the second-hop data while simultaneously receiving the first-hop data, creating a continuous flow of information without idle gaps between hops, thus eliminating latency caused by sequential transmissions.
Solution Approach 2:
The system performs preliminary actions by preparing and multiplexing multiple messages in advance. The relay node prepares both the acknowledgment and the next data packet before transmission, allowing them to be sent simultaneously in a single PPDU, which reduces the time required for complete message transmission.
3Productivity
If relay node transmits and receives simultaneously in same band, then throughput improves, but interference and collision risk increase
Solution Approach 1:
The patent segments the transmission medium into different logical channels within the same physical band. By using multiplexed PPDUs with distinct message identifiers and addressing fields, the system divides the communication into separate logical streams that can coexist in the same frequency band without interfering with each other, allowing simultaneous transmission and reception.
Data Source
AI summary
Provided herein are apparatuses and methods for multiplexed transmission and reception of Relay node. An apparatus includes interface circuitry; and processor circuitry coupled with the interface circuitry, wherein the processor circuitry is to: decode a first-hop message received from a first node via the interface circuitry to obtain a message body; generate, in response to the first-hop message, a first-hop response message for transmission to the first node; generate a second-hop message including the message body for transmission to a second node; and multiplex the first-hop response message with the second-hop message in a same frame for transmission of the first-hop response message and the second-hop message simultaneously. Other embodiments are described and claimed.