| E-AGCH: E-DCH Absolute Grant Channel |
E-DCH Absolute Grant Channel(E-AGCH) is one of the five Enhanced Dedicated Channels (E-DCH), which provides an absolute power level above the level for the DPDCH (associated with a DCH) that the UE should adopt. E-AGCH tell a UE how to regulate its transmit power level.
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| E-DCH: Enhanced Dedicated Channel |
Enhanced Dedicated Channel (E-DCH) is a transport uplink channel used in the 3G technologies (such as HSUPA) to improve capacity and data throughput and reduce the delays in dedicated channels in the uplink. The maximum theoretical uplink data rate that can be achieved is 5.6 Mbps. As with HSDPA, E-DCH relies on improvements implemented both in the PHY and the MAC layer. The definition of the E-DCH introduces five new physical layer channels: E-DPDCH, E-DPCCH, E-AGCH, E-RGCH and E-HICH.
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| E-DPCCH: E-DCH Dedicated Physical Contro |
E-DCH Dedicated Physical Control Channel (E-DPCCH) is one of the five Enhanced Dedicated Channels (E-DCH), which controls channels associated with the E-DPDCH providing information to the Node-B on how to decode the E-DPDCH.
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| E-DPDCH: E-DCH Dedicated Physical Data C |
E-DCH Dedicated Physical Data Control Channel (E-DPDCH) is one of the five Enhanced Dedicated Channels (E-DCH), which is the physical channel used by E-DCH for the transmission of user data.
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| E-GSM: Extended Global System for Mobile |
EGSM is an extension to the GSM900 spectrum. EGSM spectrum is 880-890 MHz paired with 925-935 MHz, which is just below the original GSM 900 band. EGSM is a small radio frequency band used in Europe to provide added network capacity for GSM 900 networks. The additional 10Mhz provides an additional 50 channels.
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| E-HICH: E-DCH HARQ Acknowledgement Indic |
E-DCH HARQ Acknowledgement Indicator Channel (E-HIGH) is one of the five Enhanced Dedicated Channels (E-DCH), which is used by Node-B to send HARQ ACK/NACK messages back to the UE.
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| E-RGCH: E-DCH Relative Grant Channel |
E-DCH Relative Grant Channel(E-RGCH) is one of the five Enhanced Dedicated Channels (E-DCH), which indicates to the UE whether to increase, decrease or keep unchanged the transmit power level of the E-DCH.
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| E-TAGS: Extended Total Access Communicat |
E-TAGS is Extension of the TACS (Total Access Communications System) system through the allocation of additional radio channels.
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| E-TDMA: Enhanced or exended TDMA |
Enhanced or exended TDMA (E-TDMA) is an enhanced version of TDMA which will not only serve cellular, but could provide PCN-like services within current spectrum allocations.
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| E-UTRA: Evolved-UMTS Terrestrial Radio A |
Evolved-UMTS Terrestrial Radio Access (E-UTRA or EUTRA), also known as UMTS Long Term Evolution (3GPP LTE) or Evolved UMTS Terrestrial Radio Access Network (EUTRAN), is specified in the 3GPP release 8. It is a key 3G technology to ensure the competitiveness of UMTS and provide a high-data-rate, low-latency and packet-optimized system. Besides peak data rates of 100 Mbps in downlink and 50 Mbps in uplink, a significant increase in spectrum efficiency and capacity as well as a significant latency reduction are planned. Commercial aspects like costs for installing and operating the network form also part of the requirements.
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| E.214 |
E.214 is a telephone numbering plan used for delivering mobility management related messages in GSM networks. The E.214 number derived from the IMSI E.214 numbers are composed of two parts. The first, the E.164 part, is made up of a country code followed by the network code. The second part of the number is made from the MSIN part of the IMSI which identifies an individual subscriber. For more details on the derivation of the E.214 number from the IMSI, see the article about the IMSI.
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| EA: Economic Area |
Economic Area (EA) is a geographic area over which a WCS operator is licensed to provide service. EAs are a group of counties in metropolitan areas having common financial, commercial and economic ties and were first used to license WCS service in the late '90s. EAs are about the size of a cellular MSA and cross state lines in some instances. EAs are used by the FCC to define areas of economic interest and are grouped into larger areas called REAGs.
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| EAP-TLS: Extensible Authentication Proto |
Extensible Authentication Protocol with Transport Layer Security (EAP-TLS) enables authenticaton between WLAN devices using certificates.
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| EAP: Extensible Authentication Protocol |
Extensible Authentication Protocol (EAP) is a general layer 2 protocol for authentication EAP supports multiple authentication mechanisms. EAP does not select a specific authentication mechanism at Link Control Phase, but rather postpones this until the Authentication Phase. This allows the authenticator to request more information before determining the specific authentication mechanism. This also permits the use of a "back-end" server which actually implements the various mechanisms while the PPP authenticator merely passes through the authentication exchange.
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| EAPoW: Extensible Authentication Protoco |
Extensible Authentication Protocol over Wireless (EAPoW) is a term used when EAPoL messages are encapsulated over 802.11 wireless frames.
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| Eb/N0: Bit Energy-to-Noise Density |
Bit Energy-to-Noise Density (Eb/N0) is the ratio of bit energy to noise density. This value is used to specify the lower limit of operation in most digital communications systems and is also used to measure radio channel performance.
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| EDACS: Enhanced Digital Access Communica |
Enhanced Digital Access Communication System (EDACS) is a radio communications protocol and product family invented in the General Electric Corporation, in the mid-1980s. EDACS was developed in competition with Motorola's Smartnet trunking system. It claimed, and continues to hold, significant market shares.
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| EDGE: Enhanced Data rates for GSM Evolut |
Enhanced Data Rates for Global Evolution (EDGE), also known as Enhanced GPRS (EGPRS), is a digital mobile phone technology which acts as a bolt-on enhancement to 2G and 2.5G General Packet Radio Service (GPRS) networks. This technology works in GSM networks. EDGE is a superset to GPRS and can function on any network with GPRS deployed on it, provided the carrier implements the necessary upgrades. EDGE uses the same spectrum allocated for GSM900, GSM1800 and GSM1900 operations.
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| EESM: Exponential Effective SIR Mapping |
Exponential Effective SIR Mapping (EESM) is a method to estimate demodulator performance in a channel with frequency selective signal and/or noise. In a sense, the EESM is a channel-dependent function that maps power level and MCS level to SINR values in the Additive White Gaussian Noise (AWGN) channel domain. This allows using this mapping along with AWGN assumptions (such as effect of an increase in power, CINR/MCS threshold tables) in order to predict the effect of MCS and boosting modification. The EESM method has been shown to yield an accurate estimation of the AWGN-equivalent SINR for frequency selective channels.
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| EFR: Enhanced Full Rate |
Enhanced Full Rate is a voice coding algorithm applied in PCS-1900 systems (and now in GSM-900 as well, first system installed in Hong Kong).
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| EGPRS: Enhanced General Packet Radio Ser |
Enhanced General Packet Radio Service (EGPRS), also known as Enhanced Data Rates for Global Evolution (EDGE), is a digital mobile phone technology. As an enhancement to GPRS, EGPRS improves spectral efficiency and data rates by adding new modulation and coding schemes. EGPRS uses the modulation technique 8PSK (8 Phase Shift Keying) to increase the achievable user data rate.
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| EHF: Extremely High Frequency |
Extremely High Frequency (EHF) is the RF spectrum between 30 GHz and 300 GHz.
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| EIA: Electronic Industry Association |
Electronic Industry Association (EIA) is a trade association and standards setting organization in the USA.
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| EIR: Equipment Identity Register |
Equipment Identity Register (EIR) is a database used by GSM and other second generation wireless systems used to identify the customer devices permitted to access the network. A device is usually placed in the EIR once its operation has been certified for the infrastructure in a laboratory or validation facility.
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| EIRP: Effective Isotropic Radiated Power |
Effective Isotropic Radiated Power (EIRP), also known as Equivalent Isotropically Radiated Power, is the amount of power that would have to be emitted by an isotropic antenna (that evenly distributes power in all directions and is a theoretical construct) to produce the peak power density observed in the direction of maximum antenna gain. EIRP can take into account the losses in transmission line and connectors and includes the gain of the antenna. The EIRP is often stated in terms of decibels over a reference power level, that would be the power emitted by an isotropic radiator with an equivalent signal strength. The EIRP allows making comparisons between different emitters regardless of type, size or form. From the EIRP, and with knowledge of a real antenna's gain, it is possible to calculate real power and field strength values.
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