Question

Which among the following statement is false about the primary user?

(a) Primary users are also known as licensed users

(b) Primary users have exclusive right to use a spectrum band

(c) Primary users are a part of the primary network

(d) Primary users compete with the secondary users to access the spectrum band

The question was asked by my school teacher while I was bunking the class.

This interesting question is from The xG Network Architecture in section Next Generation Wireless Network of Cognitive Radio

Answer 1

The correct answer is:

(d) Primary users compete with the secondary users to access the spectrum band

Explanation:

In the context of Cognitive Radio (CR) and Next Generation Wireless Networks (xG Networks), primary users (also known as licensed users) are the entities that have exclusive rights to a particular spectrum band. These rights are typically granted by regulatory bodies like the FCC. Let's break down the statements:

• (a) Primary users are also known as licensed users: This is true. Primary users hold the license to use a specific frequency band.

• (b) Primary users have exclusive right to use a spectrum band: This is true. Primary users have the legal rights to access and use a specific spectrum, which they can use without interference from others.

• (c) Primary users are a part of the primary network: This is true. Primary users belong to the primary network, which operates on the spectrum to which they have exclusive access.

• (d) Primary users compete with the secondary users to access the spectrum band: This is false. In cognitive radio networks, secondary users (unlicensed users) are allowed to access the spectrum temporarily when the primary users are not using it. The primary user does not compete with the secondary user to access the spectrum—they have priority access. Secondary users must avoid causing interference to primary users when they are active on the spectrum.

So, statement (d) is false, as primary users have priority access to the spectrum and do not compete with secondary users for access.