1.3 Mobile Device Networks Flashcards

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Cell

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A geographical coverage area served by a cellular antenna (cell tower). Cells use specific frequencies to carry voice and data to devices within that area.

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Antenna

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A physical transmitter/receiver (cell tower) that provides radio coverage for a cellular cell. Antennas connect mobile devices to the carrier's network infrastructure.

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Frequency

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The radio spectrum band used to carry cellular signals. Different generations and services use different frequency ranges which affect coverage and throughput.

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3G

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A third-generation cellular technology that enabled practical mobile data, improving services like GPS, video conferencing, and mobile internet. It marked a major shift from voice-centric networks to data-capable ones.

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4G

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A fourth-generation cellular standard (often LTE) that significantly increased mobile data speeds, enabling richer multimedia and faster internet access on mobile devices. Typical peak bandwidths reach around 150 Mbps for LTE.

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LTE

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Long-Term Evolution, a 4G cellular technology based on GSM principles that offers high-speed data and low latency for smartphones and mobile broadband devices. LTE is often used interchangeably with 4G.

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LTEA

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LTE Advanced, an enhancement of LTE that provides higher throughput (up to about 300 Mbps) through techniques like carrier aggregation and improved modulation. It increases capacity and user experience for data-heavy applications.

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5G

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The fifth generation of cellular networks introduced around 2020, offering multi-gigabit potential on high-frequency bands and improved performance even on lower bands. 5G enables low-latency applications and massive IoT deployments.

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Bandwidth

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The maximum amount of data that can be transmitted over a network connection in a given time. Higher bandwidth allows for larger or more simultaneous data transfers.

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Throughput

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The actual data rate achieved over a network, often lower than theoretical bandwidth due to overhead and network conditions. Throughput determines real-world performance for applications.

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GSM

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Global System for Mobile Communications, a widely used standard for mobile networks that forms the basis for many 4G implementations. GSM introduced standardized voice and basic data services globally.

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EDGE

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Enhanced Data rates for GSM Evolution, a 2.5G/3G-era technology that improved data throughput on GSM networks prior to full 3G rollout. EDGE provided a bridge between basic GSM and more advanced mobile data standards.

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SIM

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Subscriber Identity Module, a removable card that stores subscriber credentials, carrier info, and small amounts of user data like contacts. Moving a SIM between phones can transfer your phone number and some stored data.

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eSIM

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An embedded SIM soldered into the device that can be programmed or transferred via software without a physical card. eSIMs simplify switching carriers and managing multiple profiles on one device.

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Hotspot

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A feature that allows a mobile device to share its cellular internet connection over Wi‑Fi (802.11) so other devices can connect through it. Hotspot use may be restricted or billed separately by carriers.

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802.11

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A family of Wi‑Fi standards that provide local wireless networking with high throughput and limited range. 802.11 networks are commonly used at home and in offices for internet access without wires.

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Access Point

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A device that provides a local 802.11 wireless network for devices to connect to. Access points handle local traffic and often bridge wireless clients to wired networks or the internet.

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Bluetooth

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A short-range wireless technology for connecting peripherals like headsets, speakers, and keyboards to mobile devices. Bluetooth uses a pairing process and small PINs to establish secure, repeatable connections.

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Pairing PIN

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A personal identification number used during Bluetooth pairing to verify and secure the connection between two devices. Some devices use a fixed PIN while others generate a dynamic code during pairing.

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GPS

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Global Positioning System, a satellite-based navigation system that uses signals from multiple satellites to calculate precise location (latitude, longitude, altitude). At least four satellite signals are typically required for accurate 3D positioning.