WLAN Downlink Multi-User Multiplexing via Traffic Puncturing
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Solution Overview
Problem
The challenge of efficiently handling downlink multi-user multiplexing in wireless local area networks (WLAN) to optimize resource usage and improve spectrum efficiency, particularly in environments with varying latency and throughput requirements, is unresolved.
Innovation Solution
A network device performs correlation operations on normal and low latency traffic to identify optimal puncturing points, allowing it to combine and transmit a punctured traffic stream that includes partial information of both, thereby optimizing resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional separate transmission methods are used for normal traffic and low latency traffic, then each traffic type can be transmitted reliably, but transmission resources are wasted and spectrum efficiency is low
Solution Approach 1:
The patent combines normal traffic and low latency traffic into a single punctured traffic stream for transmission. The network device performs correlation operations to identify overlapping portions between the two traffic types, then merges them by puncturing the normal traffic with the low latency traffic, allowing both to be transmitted simultaneously over the same resources, thereby improving spectrum efficiency while maintaining reliability through correlation-based separation at the receiver
Solution Approach 2:
The patent creates a universal transmission mechanism that handles both normal traffic and low latency traffic through a single punctured traffic stream. The correlation operation enables the system to universally process different traffic types with different latency requirements using the same transmission resources, making the system multi-functional and resource-efficient
2Productivity
If transmission resources are increased to handle both traffic types simultaneously, then throughput performance improves, but resource usage becomes inefficient
Solution Approach 1:
The patent applies partial action by transmitting only the necessary portions of normal traffic and low latency traffic through the punctured stream. The correlation operation identifies the minimum required transmission resources by finding overlapping portions, and the puncturing process transmits only the essential data portions, avoiding unnecessary resource consumption while maintaining adequate throughput performance
3Productivity
If correlation operations and puncturing processing are implemented, then spectrum efficiency improves, but device complexity increases
Solution Approach 1:
The patent replaces complex multi-stream processing mechanisms with a simplified single-stream puncturing approach. Instead of maintaining separate transmission channels for normal and low latency traffic, the system uses correlation operations to mathematically identify overlapping portions and applies puncturing to combine them into one stream, reducing the number of processing components needed while achieving spectral efficiency gains
Data Source
AI summary
A network device for handling downlink (DL) multi-user multiplexing for a wireless local area network (WLAN) comprises storage device(s) and processing circuit(s). The storage device(s) is configured to store instructions. The processing circuit(s) is configured to execute the instructions of: identifying a first traffic and a second traffic; in response to the first traffic being a normal traffic and the second traffic being a low latency traffic, performing a first correlation operation according to the first traffic and the second traffic, to generate a plurality of first correlation results; determining a first maximum correlation result and a first position index according to the plurality of first correlation results; and in response to the first maximum correlation result being greater than a first threshold, puncturing the first traffic with the second traffic according to the first maximum correlation result and the first position index.