GSM

What is HLR and VLR and its function in GSM

As From the Name VLR means Visitor Location Register and HLR means Home Location Register so it has all detail of subscriber so VLR has temporary details. Let’s check in...
Article Topics :

location area identity, subscriber, mobile, system, hlr, vlr, authentication, home location register, visitor location register, sms details, detail bill imformation, calling details data, hlr in telecom, vlr in telecomAuthentication, gsm, gsm basic, hlr, hlr vlr, hlr vlr in gsm, how hlr works in gsm, iphone geolocation without explicit authorization, vlr, vlr in gsm

How Adaptive Multi-Rate Codec (AMR) work in GSM ?

Adaptive Multi-Rate (AMR) codec consists of a family of codecs (source andchannel codecs with different trade-off bit-rates) operating in the GSM FRand HR channels modes The AMR system exploits the...
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adaptive, amr, CHANNEL, coding, fr, gsm, hr, lte, multi, quality, radio, rate, speech

Dedicated Control Channel (DCCH) in GSM

SDCCH (Stand-alone Dedicated Control Channel) Uplink and Downlink. Used for call setup, authentication, ciphering location update and SMS. SACCH (Slow Associated Control Channel) Downlink and Uplink. Used to transfer signal...
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call setup, cell, control channel, dcch, dcch control channel, downlink, forward link, gsm, lte, power control, reverse link, sacch, sdcch, timing advance, uplink

How Many Broadcast Channels & what’s it work in GSM ?

BCCH(Broadcast Control Channels) Downlink Only. Broadcast information of the serving cell (System Information). Transmitted on timeslot zero of BCCH carrier. Read only by idle mobile at least once every 30...
Article Topics :

BCCH, bsic, carrier, cell, CHANNEL, code, downlink, frame, frequency, gsm, idle, information, lte, mobile, SCH, system

Basic Work of MSC (Mobile Switching Centre)

Exchange where calls are established, maintained and released Database for all subscribers and their associated features. Communicates with the BSCs on the A interface and with PSTN on fixed line....
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a interface, bsc, call, communicate, database, features, gsm, lte, msc, subscribers, support

Advantages of Intelligent Network (IN)

Concept of Intelligent Network: The introduction of new services and access to the GSM service are based on the concept of Intelligent Network (IN). This is because of the independence...
Article Topics :

Intelligent Network (IN), Advantages of Intelligent Network, Mobility management, radio frequencies, radio control, GSM serversadvantage, conventional call, dedicated, gsm, in, intelligent, lte, managed, network, server, vlr

Downlink Logical Channel in GSM

In 2G GSM Technology in forward direction Downlink (GSM BTS to GSM Mobile). There are mainly five Downlink Logical Channel in GSM. Frequency correction channel (FCCH) Synchronous channel (SCH) Broadcast...
Article Topics :

paging channel, doanlink, gsm doanlink channel, logical bts to mobile gsm channel, bts to mobile forward channel, downlink gsm channel, 2g downlink channel, fcch, bcch, agch, pch, schBCCH, bsic, CHANNEL, channel coding, channel in gsm, frequency hopping, hlr, hopping, interference, interleaving, logical, physical, pn, vlr

Structure of Combined BCCH in GSM

It is used in the configuration of cells of low traffic density and small capacity. The Combined BCCH is only configured at timeslot 0. Channel combination: FCCH?SCH?BCCH?CCCH+SDCCH/4+SACCH/4 SDCCH/4: Stand-alone dedicated...
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Structure of Combined BCCH in GSMBCCH, capacity, ccch, cell, CHANNEL, combined, control, dedicated, fcch, gsm, pn, sacch, SCH, sdcch, vlr

Structure of Main BCCH in GSM

The TDMA/FDMA multiplexing is used in GSM, the information needed in the synchronization between MS and BTS is provided by FCCH+SCH. The MS determines the frequency of the BCCH carrier...
Article Topics :

synchronization, sch, timeslots, information, frequencyBCCH, bcch gsm1800, bsic, bts, cell, epc, fcch, fdma, gsm, lte, main bcch, pn, relation, rho, SCH, tdma, vlr

Physical Combination of Logical Channel in GSM

As shown above, CCCH=PCH+RACH+AGCH; downlink CCCH=PCH+AGCH; and uplink CCCH=RACH. In the above combinations, combination 3 and 4 must be allocated to slot 0 of the BCCH carrier configured for the...
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Physical Combination of Logical Channel in GSMAGCH, allocation, BCCH, carrier, ccch, cell, CHANNEL, channel in gsm, combination, epc, frame, gsm, hlr, lte, pch, physical, pn, rach, rho, sacch, timeslot, uplink, vlr, vrf

Uplink Logical Channel in GSM

1. Random access channel (RACH) It is an uplink channel used for MS randomly access to network by requesting for an SDCCH. The request includes a 3bit setup reason (call...
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Uplink Logical Channel in GSMaccess, BCCH, cell, CHANNEL, channel in gsm, gsm, hlr, message, network, power control, sacch, sdcch, uplink, vlr

Logical Channel Type in GSM

As we know, every cell has several TRX and every TRX includes 8 timeslots (i.e. providing 8 basic physical channels). In the radio subsystem, the physical channel supports the logical...
Article Topics :

traffic channel, control channel, physical channels, channel, logical, information, frequency BCCH, cell, epc, gsm, hlr, logical channel, logical channels in gsm, lte, mapped, message, physical channel, pn, radio subsystem, rho, support, timeslots, trx, vlr, vrf

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