Mesh Control Using Preamble Link Information for CCI Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communications systems with mesh networks experience performance degradation due to co-channel interference (CCI) when multiple links use the same channel, leading to inefficient packet transmission and re-transmissions.
Innovation Solution
Implementing a method for mesh control that includes carrying link information in the preamble of data transmission frames, allowing devices to determine spatial reuse (SR) transmission availability based on source-destination relationships and predicted signal strengths, thereby mitigating CCI and enhancing system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple links in mesh network use the same channel to improve resource utilization, then channel efficiency is improved, but co-channel interference occurs causing performance degradation
Solution Approach 1:
The patent applies preliminary action by embedding link information (source-destination relationships and predicted signal strengths) in the preamble of data transmission frames before actual data transmission. This allows receiving devices to pre-calculate spatial reuse transmission availability and make informed decisions about whether to transmit on the same channel, preventing CCI before it occurs. The preamble contains advance information that enables proactive interference management.
Solution Approach 2:
The patent implements feedback by using predicted signal strength measurements and source-destination relationship information to dynamically determine spatial reuse transmission availability. Devices continuously monitor wireless transmissions, extract link information from preambles, and adjust their transmission decisions based on this feedback loop. This enables adaptive channel access that responds to real-time network conditions.
2Reliability
If devices wait for channel completion to avoid CCI, then transmission accuracy is improved, but overall system performance degrades due to increased latency
Solution Approach 1:
The patent applies local quality by enabling different transmission behaviors for different spatial locations and link types. Devices can perform spatial reuse transmissions locally when link information indicates sufficient signal strength and appropriate source-destination relationships, while avoiding transmissions that would interfere with other links. This creates location-specific transmission permissions that optimize both accuracy and throughput.
Solution Approach 2:
The patent changes the parameter of transmission availability from a binary wait-or-transmit decision to a continuous assessment based on predicted signal strength and link information. By calculating spatial reuse transmission availability using these parameters, devices can dynamically adjust their transmission behavior, transmitting when parameters indicate safety and waiting when parameters indicate potential interference, thus optimizing both accuracy and performance.
3Productivity
If spatial reuse transmission is allowed to improve throughput, then channel utilization is improved, but CCI may occur causing wrong transmission decisions
Solution Approach 1:
The patent uses preliminary action by embedding link information in preambles and performing preliminary calculations of spatial reuse transmission availability before actual data transmission. This preliminary assessment based on source-destination relationships and predicted signal strengths prevents wrong transmission decisions by evaluating interference potential in advance.
Solution Approach 2:
The patent introduces an intermediary mechanism - the spatial reuse transmission availability determination based on link information in preambles. This intermediary assessment layer sits between the desire to transmit and the actual transmission, evaluating whether the transmission would cause harmful CCI based on predicted signal strengths and source-destination relationships, thus mediating between throughput optimization and decision accuracy.
Data Source
AI summary
A method for performing mesh control in a wireless communications system and associated apparatus are provided. The method may include: carrying a set of link information in a preamble of a first data transmission frame transmitted from the first mesh device to a second mesh device, wherein the set of link information may include at least one indication among the following indications: a source-destination relationship indication between the first mesh device and the second mesh device and at least one predicted signal strength measured for the first mesh device and the second mesh device; wherein a third mesh device is arranged to monitor wireless transmission in the wireless communications system to obtain the set of link information from the first data transmission frame, and determine spatial reuse (SR) transmission availability of the third mesh device based on the set of link information.