Operations and maintenance centre

In mobile networks, an operation and maintenance center is the central location to operate and maintain the network.

There are various types of OMCs depending on the functionality:

• OMC-B (for maintaining Node B)
• OMC-R (radio. for maintaining RNC)
• UMTS OMC-U
• GPRS OMC-G
• OMC-DO
• OMC-IP

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Cellular network standards

List of mobile phone generations

0G radio telephones (1946)

• MTS
• IMTS
• Altai
• OLT
• MTA - MTB - MTC - MTD
• Mobile TeleSeratout
• AMTS
• Autotel (PALM)
• ARP
• B-Netz
• AMR

1G (1979)

AMPS family	AMPS - N-AMPS TACS - ETACS
Other	NMT C-450 Hicap Mobitex DataTAC CT1

2G (1991)

GSM/3GPP family	GSM CSD - HSCSD
3GPP2 family	cdmaOne (IS-95)
AMPS family	D-AMPS (IS-54 and IS-136)
Other	CDPD iDEN PDC PHS CT2

2G transitional
(2.5G, 2.75G, 2.9G)

GSM/3GPP family	GPRS EDGE/EGPRS - Evolved EDGE
3GPP2 family	CDMA2000 1X (TIA/EIA/IS-2000) CDMA2000 1X Advanced
Other	WiDEN DECT

3G (1998)
IMT-2000 (2001)

3GPP family	UMTS UTRA-FDD / W-CDMA FOMA UTRA-TDD LCR / TD-SCDMA UTRA-TDD HCR / TD-CDMA
3GPP2 family	CDMA2000 1xEV-DO Release 0 (TIA/IS-856)

3G transitional
(3.5G, 3.75G, 3.9G)

3GPP family	HSPA HSDPA HSUPA HSPA+ DC-HSDPA LTE (E-UTRA)
3GPP2 family	CDMA2000 1xEV-DO Revision A (TIA/EIA/IS-856-A) EV-DO Revision B (TIA/EIA/IS-856-B) EV-DO Revision C
IEEE family	Mobile WiMAX IEEE 802.16e Flash-OFDM iBurst (IEEE 802.20) WiBro
ETSI family	HiperMAN

4G (2009)
IMT Advanced (2013)

3GPP family	LTE Advanced (E-UTRA) LTE Advanced Pro (4.5G/4.9G)
IEEE family	WiMAX (IEEE 802.16m) WiMax 2.1 WiBro

5G (2018)
IMT-2020 (2021)

3GPP family	5G NR 5G-Advanced NR-IIoT LTE-M NB-IoT
Other	DECT-5G

Related articles

• Cellular networks
• Mobile telephony
• History
• Comparison of standards
• Channel access methods
  • FDMA
    • OFDMA
  • TDMA
    • STDMA
  • SSMA
    • CDMA
  • SDMA
• Spectral efficiency comparison table
• Frequency bands
  • GSM
  • UMTS
  • LTE
  • 5G NR
  • CDMA
• Mobile broadband
• Multimedia Broadcast Multicast Service
• NGMN Alliance
• Push-to-talk
• MIMO
• IMS
  • VoLTE
  • ViLTE
  • VoNR
  • ViNR
  • Wi-Fi Calling
• Osmocom

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