What are UMTS data channels?
UMTS logical channels
| UMTS/WCDMA Logical Channel | Function |
|---|---|
| Common traffic channel(CTCH) | It is used to carry user traffic(e.g.cell broadcast SMS) |
| Paging control channel(PCCH) | It is used to carry paging messages directed towards UE |
| Broadcast control channel(BCCH) | It is used to carry broadcast messages towards UE |
Which channels are used for downlink in GSM UMTS?
There are mainly five Downlink Logical Channel in GSM.
- Frequency correction channel (FCCH)
- Synchronous channel (SCH)
- Broadcast control channel (BCCH)
- Paging channel (PCH)
- Access granted channel (AGCH)
Who developed standards for a UMTS network?
the European Telecommunications Standardization Institute (ETSI)
Abstract: The standards for the universal mobile telecommunications system (UMTS) are being developed by the European Telecommunications Standardization Institute (ETSI), UMTS is a set of standards aimed at the global market.
What is UMTS band?
The UMTS frequency bands are radio frequencies used by third generation (3G) wireless Universal Mobile Telecommunications System networks. They were allocated by delegates to the World Administrative Radio Conference (WARC-92) held in Málaga-Torremolinos, Spain between 3 February 1992 and 3 March 1992.
What are UMTS channels?
The UMTS channels are communication channels used by third generation (3G) wireless Universal Mobile Telecommunications System (UMTS) networks. UMTS channels can be divided into three levels: Abrev. Supports common procedures required to establish a dedicated link between the UE and the network.
What is the difference between UMTS and CDMA?
In this way roaming is possible without the need for a huge number of frequency bands needing to be incorporated within each mobile device. UMTS uses wideband CDMA as the radio transport mechanism and the UMTS frequency channels are spaced by 5 MHz.
What are the two UMTS air interfaces for UMTS-TDD?
The two UMTS air interfaces (UTRAs) for UMTS-TDD are TD-CDMA and TD-SCDMA. Both air interfaces use a combination of two channel access methods, code-division multiple access (CDMA) and time-division multiple access (TDMA): the frequency band is divided into time slots (TDMA), which are further divided into channels using CDMA spreading codes.
What was the first UMTS network?
In 2002, NTT DoCoMo’s FOMA 3G network was the first commercial UMTS network – using a pre-release specification, it was initially incompatible with the UMTS standard at the radio level but used standard USIM cards, meaning USIM card based roaming was possible (transferring the USIM card into a UMTS or GSM phone when travelling).