In this lesson, I’ll cover the important concept of co-channel interference in wireless networks, focusing on why it occurs, its impact, and strategies for avoiding it. Co-channel interference (CCI) is a phenomenon that every wireless technician must understand to design efficient and interference-free wireless networks.
Introduction to Co-Channel Interference
As I mentioned in previous lectures, co-channel interference (CCI) is an essential factor to consider when planning a wireless network. Now, let’s dive directly into what co-channel interference is, why it happens, and how to manage it effectively.
What is Co-Channel Interference?
To understand co-channel interference, let’s imagine a network scenario with two access points, each configured to use the same channel—let’s say Channel 1 on the 2.4 GHz band.
Diagram 1: Illustration of Two Access Points Using Channel 1 with Overlapping Coverage
In a typical wireless environment, each access point provides coverage within its association boundary. Devices inside this boundary can connect or “associate” with the access point and exchange data. However, the access point’s signal doesn’t end at this boundary; it extends further, creating what’s known as a co-channel interference boundary.
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