Mobile Communications IT 709

Bluetooth Technology

• Bluetooth operates under the IEEE 802.15.1 standard, designed for short-range communication and low power consumption.
• Functions as a cable replacement technology, enabling connections among devices like laptops, peripherals, and smartphones.
• Utilizes the 2.4 GHz unlicensed radio band, employing time-division multiplexing (TDM) with time slots of 625 microseconds.
• Frequency-hopping spread spectrum (FHSS) is used to minimize interference, rotating through 79 channels in a defined pseudo-random sequence.
• Offers data rates up to 4 Mbps for quick data transfer.
• Facilitates ad hoc networking with no need for infrastructure, allowing devices to self-organize into piconets with up to eight devices.
• Operates within a personal area network (PAN) radius of less than 10 meters, suitable for devices like mice, keyboards, and headphones.
• Communication within piconets involves a master device coordinating and granting send permissions to slave devices.

WiMAX Technology

• WiMAX stands for Worldwide Interoperability for Microwave Access and is based on the IEEE 802.16 standard.
• Intended to provide wireless broadband services with a range up to 31 miles and transmission speeds exceeding 100 Mbps.
• Acts as a wireless alternative to traditional broadband services such as cable, DSL, and T1/E1 connections.
• Functions similarly to Wi-Fi but delivers higher speeds over greater distances to serve more users, addressing gaps in broadband availability in rural and suburban areas.
• A WiMAX system consists of two main components: a tower that can cover areas up to 3,000 square miles (~8,000 square km) and a receiver, which could be a portable device or integrated into laptops.
• The WiMAX tower connects to the Internet via a high-bandwidth wired connection, resembling cellular technology in infrastructure.
• Implements a secure, dedicated wireless connection using low-frequency microwaves for data transmission.