add slides about cellular acronym evolution
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Cellular Acronym Evolution
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==========================
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Harald Welte
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:copyright: Harald Welte (Liense: CC-BY-SA)
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:backend: slidy
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:max-width: 45em
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== Classic GSM
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GSM:: Global System for Mobile Communications (was: Groupe Special Mobile)
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Network is split in
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BSS:: Base Station Subsystem
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NSS:: Network Switching Subsystem
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== Classic GSM Networks: Subscriber Side
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ME:: Mobile Equipment
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SIM:: Subscriber Identity Module
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MS:: Mobile Station (ME + SIM)
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Um:: User interface (mobile)
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== Classic GSM Networks: BSS
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BSS:: Base Station Subsystem
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BTS:: Base Transceiver Station
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Abis:: Interface BTS - BSC
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BSC:: Base Station Controller
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A:: Interface BSC - MSC
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== Classic GSM Networks: NSS
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MSC:: Mobile Switching Center
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VLR:: Visitor Location Register
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HLR:: Home Location Register
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SMSC:: SMS Service Center
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== GPRS extends GSM
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CCU:: Circuit Control Unit
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PCU:: Packet Control Unit
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Gb:: Interface PCU - SGSN
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SGSN:: Serving GPRS Support Node
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GGSN:: Gateway GPRS Support Node
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== UMTS
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UMTS:: Univesal Mobile Telephony System
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WCDMA:: Wideband Carrier Division Multiple Access
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Network is split in RAN + CN
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RAN:: Radio Access Network
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CN:: Core Network
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== UMTS Subscriber Side
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ME:: Mobile Equipment (no change)
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UICC:: Univresal Integrated Chip Circuit
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USIM:: UMTS SIM (Application on UICC), successor of SIM
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UE:: User Equipment (Successor of MS)
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Uu:: User interface, universal. Successor of Um
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== UMTS Radio Access Network (RAN)
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RAN:: Successor of BSS
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GERAN:: GPRS/EDGE RAN (legacy part)
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UTRAN:: Universal Telephony RAN (UMTS RAN)
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NodeB:: Successor of BTS
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Iub:: Interface NodeB - RNC (Successor of Abis)
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RNC:: Successor of BSC
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Iu-CS:: Interface RNC - MSC (Successor of A)
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Iu-PS:: Interface RNC - SGSN (Successor of Gb)
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== UMTS Core Netwokr (CN)
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MSC:: Mobile Switching Center
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VLR:: Visitor Location Register
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HLR:: Home Location Register
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SMSC:: SMS Service Center
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SGSN:: Serving GPRS Support Node
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Gn:: Interface between SGSN and GGSN
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GGSN:: Gateway GPRS Support Node
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(no acronym changes)
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== UMTS Release 4
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The MSC functionality is split between control and user plane;
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MSS:: Mobile Switching Center Server
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MGW:: Media GateWay
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== LTE (Long Term Evolution)
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After your network is already universal, what else can happen? It
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*evolves*...
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LTE UE:: UserEquipment (no rename)
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LTE Uu:: LTE User interface (universal)
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E-UTRAN:: Evolved UTRNA (successor to UTRAN)
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eNodeB:: Evolved NodeB (successor to NodeB)
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S1:: Interface between eNodeB and MME (successor to Iu-PS)
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== LTE (Long Term Evolution)
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MME:: Mobility Management Engine (partial successor to SGSN)
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S11:: Interface between MME and S-GW
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S-GW:: Serving GateWay (partial successor to SGSN)
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S5:: Interface between S-GW and P-GW (successor to Gn)
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P-GW:: Packet Data Network GateWay (successor to GGSN)
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(RNC has completely been removed, eNodeBs arrange hand-overs directly
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among each other)
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== Radio Interface Protocol Stacks
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[options="header"]
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|===
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| GSM | GPRS | UMTS | LTE
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| - | SNDCP | PDCP | PDCP
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| RR | GRR | RRC | LTE RRC
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| LAPD | RLC/MAC | RLC/MAC | LTE RLC/MAC
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| Um | Um | Uu | LTE Uu
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|===
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== Radio Interface Logical Channels
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[options="header"]
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|===
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| GSM | GPRS | UMTS | LTE
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| BCCH | (P)BCC | BCCH | BCCH
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| CCCH | (P)CCCH | CCCH | CCCH
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| SDCCH | - | DCCH | DCCH
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| TCH | - | DTCH | DTCH
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| - | PCCH | PCCH | PCCH
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|===
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In GSM, logical channels are directly on top of the physical layer,
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while UMTS and LTE introduce complex physica and transport channel
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concepts underneath the logical channel.
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== UMTS Physical / Transport / Logical Channels
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image::765px-UMTS_Channels.svg.png[]
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By Timothy Colgan - Own work, CC BY-SA 3.0,
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https://commons.wikimedia.org/w/index.php?curid=19454393
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== The End
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