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23 Cards in this Set
- Front
- Back
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The area of a cell is approximately how many square miles?
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10
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The device that connects the base stations with the wired telephone network is the _________.
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MTSO
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Each of the following is a valid cellular telephone code except ___________.
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DSC
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_______________ occurs when a user begins moving towards another cell and the phone automatically associates with the base station of that cell.
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Hand-off
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The special frequency that a cellular phone and base station use for exchanging setup information is __________.
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control channel
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First Generation (1G) networks use analog signals and the maximum transmission speed is 9.6 Kbps.
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True
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1G technology is based on Advanced Mobile Phone Service (AMPS).
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True
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Division by frequency, so that each caller is allocated part of the spectrum for all of the time, is the basis of TDMA.
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False
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2G systems use digital instead of analog transmissions.
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True
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There are two different technologies that are used with 2G—WCDMA and CDMA2000.
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False
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The primary difference between 2G and 2.5G networks is that 2.5G networks are ____________ instead of circuit-switched networks.
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packet switched
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When migrating from a TDMA or GSM network, the next step would be to a ____________.
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GPRS network
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_______________ is considered a "booster" for GPRS systems and can transmit up to 384 Kbps.
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EDGE
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Generation __________ is intended to be a uniform and global worldwide standard for cellular wireless communication.
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three
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What is Short Message Service (SMS)?
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A system that allows delivery of short, text-based messages between wireless devices such as cellular phones and pagers.
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Explain how WAP works.
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A WAP cellphone runs a tiny browser program called a microbrowser that uses Wireless Markup Language. WML can only display text-based Web content. A gateway computer runs special software that translates HTML into WML.
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What are WML decks and cards?
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Cards are blocks of text-based Web data that is reformatted by a WAP gateway to display on the small screen of a cellular phone. A deck is one or more cards.
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What are differences between WAP and i-mode?
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i-mode is based on compact HTML and WAP is based on WML. cHTML is a subset of HTML and has its own set of tags and attributes. Users of i-mode are charged by the amount of information downloaded whereas WAP users are charged by the connection time.
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What are some advantages of Java 2 Micro Edition (J2ME)?
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J2ME allows applications to be developed for a mobile device. These applications can be made more intelligent than a browser, for example, allowing voice-activated dialing, date books and voice recorders.
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What is BREW? How is it different from other client software?
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BREW is a very small, memory efficient runtime environment that supports applications written in Java or C/C++. Applications can be downloaded on-the-fly to a cellular phone or connected other mobile device.
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List the three major ways in which satellites are used. Which is used for fixed broadband wireless?
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Research, weather and military, and reflectors. Reflectors are used for fixed broadband wireless.
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Describe Low Earth Orbit (LEO) satellites.
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LEOs orbit the Earth between 200 and 900 miles, must travel at high-speeds to stay in orbit, which means that they circle the earth in about 90 minutes. LEOs are used primarily for voice and broadband services. About 225 satellites are required to cover the entire planet but the signals have low latency so they are ideal for delay-sensitive data transmissions.
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How can the Geosynchronous Earth Orbit (GEO) satellite system cover the earth with only three satellites?
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Because of the distance at which GEOs orbit the planet, their footprint is very large.
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