Mobile Computing Definitions

This glossary explains the meaning of key words and phrases that information technology (IT) and business professionals use when discussing mobile computing and related software products. You can find additional definitions by visiting WhatIs.com or using the search box below.

  • H

    handie talkie (HT, walkie talkie, handheld)

    A handie talkie, often referred to by its abbreviation, HT, is a handheld, portable two-way radio transceiver.

  • handoff

    In a cellular telephone network, handoff is the transition for any given user of signal transmission from one base station to a geographically adjacent base station as the user moves around.

  • Handspring

    Handspring was a company that manufactured portable computer/organizer hardware.

  • handtop (ultra personal computer)

    A handtop is a full-featured portable computer that is slightly larger than a PDA, but much smaller than a laptop.

  • HDML (Handheld Device Markup Language)

    HDML (Handheld Device Markup Language) - often compared to Wireless Markup Language (WML) - is a language that allows the text portions of Web pages to be presented on cellular telephones and personal digital assistants (PDA) via wireless access.

  • helical antenna

    A helical antenna is a specialized antenna that emits and responds to electromagnetic fields with rotating (circular)polarization.

  • hertz

    Hertz is a unit of frequency (of change in state or cycle in a sound wave, alternating current, or other cyclical waveform) of one cycle per second.

  • Hierarchical Mobile IPv6 (HMIPv6)

    Hierarchical Mobile IPv6 (HMIPv6) is the proposed enhancement of Mobile Internet Protocol versions 6 (MIPv6) that is designed to reduce the amount of signaling required and to improve handoffspeed for mobile connections.

  • HiperLAN

    MEO satellite"HiperLAN is a set of wireless local area network (WLAN) communication standards primarily used in European countries.

  • HomePNA

    HomePNA is an industry standard for interconnecting computers within a home using existing telephone lines and registered jack.

  • horn antenna

    A horn antenna is used for the transmission and reception of microwave signals.

  • hot spot

    For users of portable computers equipped for wireless, a hot spot (or hotspot) is a wireless LAN (local area network) node that provides Internet connection and virtual private network (VPN) access from a given location.

  • hot zone

    A hot zone is a wireless access area created by multiple hot spots located in close proximity to each other.

  • HSDPA (High-Speed Downlink Packet Access)

    High-Speed Downlink Packet Access (HSDPA) is a packet-based mobile telephony protocol used in 3G UMTS radio networks. (...Continued)

  • HSPA (high speed packet access)

    HSPA (high speed packet access) is a third-generation (3G) mobile broadband communications technology.

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