Multi-Link Wireless Device TID Mapping for High-Density Throughput
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Solution Overview
Problem
Current wireless LAN technologies face limitations in supporting high-throughput communications, particularly in high-density environments, where existing standards like IEEE 802.11ac and 802.11ad struggle to provide efficient data transmission due to interference and range constraints, necessitating a method to effectively utilize multiple links for enhanced communication efficiency.
Innovation Solution
A multi-link device and method that utilizes a processor to manage physical layer protocol data units (PPDUs) with reverse direction grants and access category constraint signaling, allowing for the mapping of traffic identifiers (TIDs) or access categories (ACs) to specific links, enabling efficient frame transmission based on priority and availability, thereby optimizing data transmission across multiple links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple links are utilized for high-throughput communication, then data transmission speed and reliability are improved, but system complexity and interference management become more difficult
Solution Approach 1:
The patent segments the communication system into multiple independent links (first link and second link) operating on different frequency bands. Each link can be managed separately with its own transmission opportunities and resource allocation, allowing the system to achieve high throughput through parallel transmission while maintaining manageable complexity by treating each link as a distinct communication channel.
2Productivity
If multiple links are utilized for high-throughput communication, then data transmission speed and reliability are improved, but interference management becomes more difficult
Solution Approach 1:
The patent introduces a frequency dimension by operating multiple links on different frequency bands (e.g., 2.4 GHz and 5 GHz). This dimensional separation allows simultaneous transmissions on different links without mutual interference, enabling high throughput while naturally avoiding interference issues that would arise from single-frequency operations.
3Reliability
If TID-to-link mapping is implemented for priority-based transmission, then communication efficiency and reliability are improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-establishing TID-to-link mapping relationships before data transmission begins. Each traffic identifier (TID) is预先 assigned to specific links based on priority requirements, so that when data needs to be transmitted, the appropriate link is already determined without requiring complex real-time decision-making, thus improving reliability while keeping device complexity manageable.
Data Source
AI summary
A multi-link device using a plurality of links is disclosed. A processor receives, in any one link of the plurality of links, a first physical layer protocol data unit (PPDU) including access category (AC) constraint signaling and a reverse direction (RD) grant from a station which is a transmission opportunity (TXOP) holder or a service period (SP) source, and transmits, in the any one link, a second PPDU to the station in response to the first PPDU on the basis of the AC constraint signaling. The AC constraint signaling indicates whether a traffic identifier (TID) or AC of a frame included in the second PPDU is constrained.