Information about Hop (telecommunications)

In telecommunication, the term hop has the following meanings:
  1. The excursion of a radio wave from the Earth to the ionosphere and back to the Earth. The number of hops indicates the number of reflections from the ionosphere.
  2. A similar excursion from an earth station to a satellite to another station, counted similarly except that if the return trip is not by satellite, then it's only a half hop.
  3. A waveform transmitted for the duration of each relocation of the carrier frequency of a Frequency-hopping spread spectrum system.
  4. To modify a modulated waveform with constant center frequency so that it frequency hops.
  5. One step, from one router to the next, on the path of a packet on an Internet Protocol network (often discovered with pings or traceroutes).


Some of this text is taken from a public domain entry in Federal Standard 1037C in support of MIL-STD-188.
Telecommunication is the transmission of signals over a distance for the purpose of communication. In modern times, this process typically involves the sending of electromagnetic waves by electronic transmitters, but in earlier times telecommunication may have involved the use of
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Radio Wave may mean:
  • Radio frequency
  • Radio Wave 96.5, a radio station in Blackpool, UK

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EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001. Their greatest hit, their debut single "time after time", peaked at #13 in the Oricon singles chart.
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ionosphere is the uppermost part of the atmosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner edge of the magnetosphere.
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Waveform means the shape and form of a signal such as a wave moving in a solid, liquid or gaseous medium.

In many cases the medium in which the wave is being propagated does not permit a direct visual image of the form.
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Carrier frequency is a term used to designate:
  • The nominal frequency of a carrier wave
  • The center frequency of a frequency modulation signal
  • The frequency of the unmodulated electrical wave at the output of an amplitude modulated (AM), frequency modulated (FM), or

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Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver.
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center frequency of a filter or channel is a measure of a central frequency between the upper and lower cutoff frequencies. It is usually defined as either the arithmetic mean or the geometric mean of the lower cutoff frequency and the upper cutoff frequency of a band-pass system
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router is a device that extracts the destination of a packet it receives, selects the best path to that destination, and forwards data packets to the next device along this path.[1] They connect networks together; a LAN to a WAN for example, to access the Internet.
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Internet protocol may refer to:
  • The Internet Protocol, a data-oriented protocol used for communicating data across a packet-switched internetwork
  • The Internet protocol suite, a set of communications protocols that implement the protocol stack on which the Internet runs

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ping is a computer network tool used to test whether a particular host is reachable across an IP network. It works by sending ICMP “echo request” packets to the target host and listening for ICMP “echo response” replies.
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traceroute is a computer network tool used to determine the route taken by packets across an IP network. An IPv6 variant, traceroute6, is also widely available.

The traceroute tool is available on practically all Unix-like operating systems.
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Federal Standard 1037C, entitled Telecommunications: Glossary of Telecommunication Terms is a United States Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended.
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MIL-STD-188 is a series of U.S. military standards relating to telecommunications.

Purpose

Faced with “past technical deficiencies in telecommunications systems and equipment and software…that were traced to basic inadequacies in the application of
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