Dynamic OBSS Transmission Forbiddance via Color Field
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face interference issues due to overlapping basic service sets (OBSSs) that can degrade network performance by causing concurrent transmissions, leading to unreliable data delivery and reduced bandwidth.
Innovation Solution
A method where a transmitter in a first BSS identifies protected transmissions and dynamically forbids concurrent transmissions from overlapping OBSSs by setting specific values in frames, such as a color field or flag, and applying disincentive rules to prevent interference, ensuring reliable data delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OBSS transmitters are allowed to transmit concurrently to increase bandwidth utilization, then system productivity is improved, but transmission reliability deteriorates due to interference
Solution Approach 1:
The patent implements dynamic OBSS transmission forbiddance by allowing transmitters to adaptively set the 'obss-color' field in frame preambles. When a transmitter detects poor channel conditions or high interference, it can dynamically forbid OBSS transmissions by setting the color field to a specific value, thereby resolving the contradiction between bandwidth utilization and transmission reliability through real-time adaptation rather than static configuration
Solution Approach 2:
The patent changes the parameter of OBSS transmission permission by using the 'obss-color' field in the frame preamble to indicate whether OBSS transmissions are forbidden. By modifying this parameter dynamically based on channel conditions, the system can switch between allowing concurrent transmissions (high bandwidth utilization) and forbidding them (high transmission reliability), thus resolving the technical contradiction
2Reliability
If transmission forbiddance is applied to protect critical transmissions, then transmission reliability is improved, but bandwidth utilization deteriorates due to reduced concurrent transmissions
Solution Approach 1:
The patent applies transmission forbiddance locally rather than globally by using the 'obss-color' field to indicate forbiddance only for specific transmissions that require protection. This allows critical data transmissions to be protected while permitting other non-critical transmissions to proceed concurrently, thus maintaining bandwidth efficiency while improving data delivery quality for protected transmissions
Solution Approach 2:
The patent implements partial transmission forbiddance by selectively applying the forbiddance indication only when and where it is necessary for protecting critical transmissions. Rather than forbidding all OBSS transmissions universally, the system applies partial forbiddance based on the specific transmission's importance and channel conditions, thereby maintaining overall bandwidth efficiency while ensuring reliability for critical data
3Reliability
If transmitters continuously monitor and adjust OBSS forbiddance settings, then transmission reliability is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service by enabling transmitters to autonomously monitor channel conditions, evaluate the need for OBSS transmission protection, and dynamically set the 'obss-color' field without requiring centralized control or complex coordination with other transmitters. Each transmitter independently makes decisions based on local observations, thereby improving reliability while keeping device complexity manageable through decentralized autonomous operation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Techniques are provided for dynamic forbiddance of wireless transmissions by transmitters of one or more overlapping basic service set (OBSS) concurrent with transmissions of a transmitter in a first basic service set (BSS). A first transmitter of a first BSS may identify a transmission that is to be a protected transmission, and based on the identification may dynamically forbid one or more other transmitters of an OBSS that overlaps with the first BSS from concurrent transmissions with the protected transmission. An access point or station of an OBSS may receive an indication of the forbiddance of transmissions and may apply deferral rules to defer transmissions based on the forbiddance. One or more disincentive rules may be applied at the first transmitter to provide disincentives for forbidding OBSS reuse.