| TACS: Total Access Communication System |
Total Access Communication System (TACS) is the European version of AMPS -- the 1G technology for mobile wireless. ETACS was an extended version of TACS with more channels. TACS and ETACS are now obsolete in Europe, having been replaced by the more scalable and all-digital GSM system.
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| TAMS: Track and Manage Service |
Track and Manage Service (TAMS) offers scheduled reporting on the status reports of industry standard sensors, GPS position and other event status reports.
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| TAP: Telocator Alphanumeric Protocol |
Telocator Alphanumeric Protocol (TAP) is a simple protocol dedicated to the forwarding of alphanumeric pages. Although the features and capabilities of TAP are in TDP, the TAP protocol may co-exist with TDP. The TAP protocol may be utilized to forward binary data to RF-linked computers if input is formatted and processed.
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| TCH/F: Traffic Channel - full rate |
Traffic Channel - full rate (TCH/F) is a traffic channel using full rate voice coding.
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| TCH/H: Traffic Channel - half rate |
Traffic Channel - half rate (TCH/H) is a traffic channel using half rate voice coding.
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| TCH: Traffic Channel |
Traffic Channel (TCH) is a logical channel that allows the transmission of speech or data. In most second generation systems, the traffic channel can be either full or half rate.
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| TCM: Trellis Code Modulation |
Trellis Coded Modulation (TCM) is one of the coded modulation techniques used in digital communications. It combines the choice of a modulation scheme with that of a convolutional code together for the purpose of gaining noise immunity over encoded transmission without expanding the signal bandwidth or increasing the transmitted power.
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| TCP: Telocator Conversion Processor |
Telocator Conversion Processor (TCP) is a front end processor which executes the Telocator Format Conversion (TFC) process.
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| TCS: Telephony Control Protocol Specific |
The Telephony Control Protocol Specification (TCS) is a protocol in the Bluetooth protocol stack that defines ways to send audio calls between Bluetooth devices. It also controls the device mobility management procedures. It can be used to create a three-in-one phone:
1) On the move, a mobile phone connected to a cellular network;
2) At home, a cordless phone connected to a PSTN via a gateway or base station;
3) At the office, an intercom.
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| TD-CDMA: Time Division, Code Division Mu |
Time Division, Code Division Multiple Access (TD-CDMA) is a 3G proposal combining elements of TDMA and CDMA. It is developed and used primarily in China, combining time division multiplexing with CDMA techniques.
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| TD-SCDMA: Time Division Synchronous Code |
Time Division Synchronous Code Division Multiple Access (TD-SCDMA) is a new technology developed by Siemens and the China Academy of Telecommunication Technology (CATR). TD-SCDMA is part of the ITU 3G standard harmonization and will likely be adopted by some operators in China. This proposed standard is 1.6 MHz wide and uses multiple timeslots, synchronous CDMA, and new detection and interference cancellation schemes.
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| TDD: Time Division Duplex |
TDD: Time Division Duplex Time Division Duplexing (TDD) refers to a transmission scheme that allows an asymmetric flow for uplink and downlink transmission which is more suited to data transmission. In a Time Division Duplex system, a common carrier is shared between the uplink and downlink, the resource being switched in time. Users are allocated one or more timeslots for uplink and downlink transmission.
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| TDMA: Time Division Multiple Access |
Time Division Multiple Access (TDMA) divides a radio frequency available to a network into time slots and then allocates slots to multiple calls. So one frequency can support multiple, simultaneous data channels, using bandwidth more efficiently than earlier technologies. Available in 800-MHz or 1900-MHz frequencies, TDMA is used by the GSM digital cellular system.
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| TDN: Temporary Directory Number |
Temporary Directory Number (TDN) is a temporary identification number assigned to a mobile while attached to the network.
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| TDP: Telocator Data Protocol |
Telocator Data Protocol (TDP) is a suite of protocols used for sending messages from a computer, through a paging system, to a mobile receiving computer. Together, these protocols define the flow of messages from input devices through several processing steps until the entire message is received by an RF-linked computer. The set is compromised of several protocols, including TME, TRT, and TMC.
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| TDTD: Time Division Transmit Diversity |
Time Division Transmit Diversity (TDTD) is a technique utilizing multiple transmit stations to originate the downlink signal and improve performance. The transmit station used can be determined by either a fixed pattern or based on a QoS measurement made at the mobile. See also STD and TSTD.
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| Telematics |
Telematics means the integration of wireless communications, vehicle monitoring systems and location devices.
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| TFC: Telocator Format Conversion |
Telocator Format Conversion (TFC) describes how binary data messages may be forwarded to RF-linked computers through the use of TAP protocol.
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| TIA: Telecommunications Industry Associa |
Telecommunications Industry Association (TIA) is one of the Telecommunications standards setting bodies in the United States.
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| TID: Tunnel Identifier |
Tunnel Identifier (TID), containing an MM Context ID and an NSAPI, is used to identify a GTP tunnel between two GSNs in a GPRS network. A tunnel is created whenever an SGSN sends a Create PDP Context Request in a GPRS network.
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| Time dispersion |
Time dispersion is a manifestation of multipath propagation that stretches the signal in time so that the duration of the received signal is greater than the transmitted signal.
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| Time diversity |
Time diversity is the technique used by CDMA systems to overcome the effects of multipath fading. Through the use of a rake receiver, individual elements or fingers can be offset in time to account for different arrival times of multipath signals.
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| TinyOS |
TinyOS is an open source component-based operating system and platform targeting wireless sensor networks. TinyOS is an embedded operating system, written in NesC programming language, as a set of cooperating tasks and processes. It is designed to be able to incorporate rapid innovation as well as to operate within the severe memory constraints inherent in sensor networks. It is intended to be incorporated into smartdust.
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| TIPP: Telocator Interswitch Paging Proto |
Telocator Interswitch Paging Protocol (TIPP) is a TCP/IP-based inter-PMP protocol utilized to move information across a network of PMP's
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| TKIP: Temporal Key Integrirty Protocol |
Temporal Key Integrity Protocol (TKIP) is part of the IEEE 802.11i encryption standard for wireless LANs security. TKIP utilizes RC4 stream cippher with 128 bit key for encryption and 64 bit key for authentication. TKIP is the next generation of WEP (Wired Equivalency Protocol). TKIP provides per-packet key mixing, a message integrity check and a re-keying mechanism, thus fixing the flaws of WEP.
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