Hello, everyone!
Today, I would like to share with you an article on Basic Service Set in wireless communications.
Prerequisite * GSM in Wireless Communication - 1
* GSM in Wireless Communication - 2
Wireless communication, as we all know, takes place over the air. To regulate device connectivity, each wireless service area should be a closed group of mobile devices forming around a fixed device. Before mobile devices may communicate with one another, they must first advertise their capabilities, after which permission to join should be granted. This type of structure is known as a Basic service set, according to IEEE (BSS).
An access point (AP) is located at the heart of every BSS and delivers services that are required to create the wireless communication infrastructure. The AP employs a single wireless channel and operates in infrastructure mode. That channel must be used by all devices that want to connect to the AP.
BSS is bounded to the region covered by the AP, i.e. the area up to which the AP's signal is reachable, because its operation is dependent on it. The Basic Service Area (BSA) or cell is the name for this area. The cell is typically circular in shape, with AP at the middle. For the BSS, the AP acts as a single point of contact. To announce its presence to all devices in the cell, the AP employs a unique BSS identification (BSSID) based on its own MAC address.
To uniquely identify the AP, the AP additionally exposes a human-readable text string called Service Set identifier (SSID). BSSID stands for a machine-readable unique tag that identifies a wireless service, whereas SSID stands for a human-readable service tag.
The term "association" refers to a mobile device's membership in the BSS. The device becomes a BSS client or an 802.11 station once it is connected (STA). All data communication occurs through the AP utilizing BSSID as a source and destination address as long as devices are connected to the AP.
You might wonder why all traffic must go via the AP. They can communicate directly with other devices without having to go through AP. If we do not do so, the entire purpose of wireless service will be lost. Data sent over AP is more stable and regulated.
Repeater :
In wireless infrastructure, an access point (AP) is frequently connected to the switched networks. The signal coverage region of the BSS is limited (BSA). We can add extra APs to increase signal coverage, however this is not always achievable. In this case, a Repeater is the best option.
The repeater is simply an AP set to Repeater mode. A wireless repeater receives a signal and retransmits it in a new cell surrounding the repeater. To keep the original and replayed signals separated on a distinct channel, the repeater employs two transmitters and a receiver.
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