Category Archive for: Telecommunication

Frequency Division Duplexing

Frequency–division duplexing (FDD) is a method for establishing a full-duplex communications link that uses two different radio frequencies for transmitter and receiver operation. The transmit direction and receive direction frequencies are separated by a defined frequency offset. Duplexing is the process of achieving two-way communications over a communications channel. It takes two forms: half duplex and…

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LTE band and frequency details

LTE frequency bands based in standards, and bands are growing and uses by various cellular systems . There are total 44 bands available and counting in future. There is a growing number of LTE frequency bands that are being designated as possibilities for use with LTE. Many of the LTE frequency bands are already in…

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The IMS core  network predominantly consists of the Call Session Control Function (CSCF) and the Home Subscriber Server (HSS). The Call  session control function plays an  important role in IMS. The CSCF node facilitates SIP  session setup and teardown. The HSS plays the role of a  location server in IMS,  in addition to acting as…

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Address discovery (P-CSCF) in IMS Core network

UE connects to the IMS Core NETWORK Prior to the network discovery. For UE IMS and P-CSCF are Outbound proxy .The P-CSCF is the entry point to the IMS domain and serves as the outbound proxy server for the UE. The UE attaches to the P-CSCF prior to performing IMS registrations and initiating SIP sessions.…

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various telecom networks evolve over time

Here are major telecom networks that has been evolved over a period of time to provide High speed and on time teleservices. LTE : Long Term Evolution latest currentoly uses in 4G all of below are 3G and older technology HSPA :high speed packet access used in 3G packet data transmission EDGE : Enhanced Data…

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application areas & future gaps for LTE

LTE – LONG TERM EVOLUTION Long-Term Evolution Time-Division Duplex (LTE-TDD), also referred to as TDD LTE, is a 4G telecommunications technology and standard co-developed by an international coalition of companies, including China Mobile, Datang Telecom, Huawei, ZTE, Nokia Solutions and Networks, Qualcomm, Samsung, and ST-Ericsson. It is one of the two mobile data transmission technologies…

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Carrier Aggregation in LTE-Advanced

For carrier aggregation in LTE there is a concept of Inter-band and intra-band Carrier Aggregation, with contagious and non-contagious bands. we consider a aggregation of band it happens at RLC and PDCP layer in LTE stack. For which each e-nodeB aggregated carrier known as Component carrier will make a aggregation of maximum 5 carrier.The component…

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LTE Band Information

Here are Information for a EUTRA Absolute radio-frequency channel number (EARFCN) LTE Frequency band with 36.101 (Rel 14 Dec 2016) Increasing band   Increasing band Band Name Downlink (MHz) Bandwidth DL/UL (MHz) Uplink (MHz) Duplex spacing (MHz) Low Middle High Low Middle High Earfcn Earfcn 1 2100 2110 0 2140 300 2170 599 60 1920 18000 1950…

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