Multi-Link Data Frame Fragmentation for Wireless Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless LAN technologies face challenges in supporting high-throughput applications and real-time transmission due to interference issues when performing simultaneous transmit and receive (STR) operations on multi-links, particularly when adjacent links experience signal interference, leading to inefficiencies in channel access and data transmission.
Innovation Solution
A method and apparatus that perform backoff operations on multiple links to synchronize data frame transmission and reception, utilizing fragmentation techniques to match transmission completion times across links and configuring transmit opportunities (TXOP) to include time for data frame transmission, block ACK reception, and subsequent data frame transmission, even when STR operations are not supported by all devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous transmit and receive (STR) operations are performed on multiple adjacent links, then transmission throughput is improved, but signal interference between links increases causing channel access failures
Solution Approach 1:
The patent segments the transmission process by dividing data frames into multiple parts (first data frame part, second data frame part) and transmitting them on different links at different times. This segmentation allows the system to avoid simultaneous transmission on adjacent links, reducing interference while still utilizing multiple links for improved throughput.
Solution Approach 2:
The patent implements dynamic link selection and transmission timing adjustment based on interference conditions. The transmitting device determines whether to perform STR operations or sequential transmissions by evaluating channel conditions and interference levels, dynamically adapting the transmission strategy to balance throughput and interference avoidance.
2Reliability
If channel sensing operations are performed to detect interference levels, then transmission reliability is improved, but transmission latency increases due to additional sensing time
Solution Approach 1:
The patent performs channel sensing operations in advance before actual data transmission begins. By conducting interference level detection and determining transmission strategies beforehand, the system ensures reliable transmission decisions are made while minimizing the time added to the actual data transfer process.
Solution Approach 2:
The transmitting device autonomously performs channel sensing, interference detection, and transmission timing adjustment without requiring external coordination or additional signaling overhead. This self-service approach allows the device to make real-time transmission decisions based on current channel conditions, maintaining reliability while minimizing latency.
3Adaptability or versatility
If data frames are fragmented to synchronize transmission completion times, then multi-link coordination is improved, but device complexity increases due to additional fragmentation operations
Solution Approach 1:
The patent divides data frames into multiple parts (first data frame part, second data frame part) with specific timing relationships. This segmentation enables precise control over transmission completion times on different links, improving multi-link coordination while keeping the fragmentation logic relatively simple and structured.
Data Source
AI summary
A method and a device for transmitting/receiving data in a communication system supporting a multi-link includes a method of a first device, including the steps of: performing a first back-off operation on a first data frame in a first link; performing a second back-off operation on a second data frame in a second link; transmitting the first data frame to a second device in the first link if the first back-off operation is successful; generating a second data frame part #1 and a second data frame part #2 by performing a fragmentation operation for the second data frame in order to match a transmission completion point of the second data frame with a transmission completion point of the first data frame if the second back-off operation is successful during the transmission of the first data frame; and transmitting the second data frame part #1 to the second device in the second link.