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diff --git a/2016/cellular_acronym_evolution/765px-UMTS_Channels.svg.png b/2016/cellular_acronym_evolution/765px-UMTS_Channels.svg.png Binary files differnew file mode 100644 index 0000000..4820749 --- /dev/null +++ b/2016/cellular_acronym_evolution/765px-UMTS_Channels.svg.png diff --git a/2016/cellular_acronym_evolution/cellular_acronym_evolution.adoc b/2016/cellular_acronym_evolution/cellular_acronym_evolution.adoc new file mode 100644 index 0000000..bb58fc5 --- /dev/null +++ b/2016/cellular_acronym_evolution/cellular_acronym_evolution.adoc @@ -0,0 +1,157 @@ +Cellular Acronym Evolution +========================== +Harald Welte +:copyright: Harald Welte (Liense: CC-BY-SA) +:backend: slidy +:max-width: 45em + +== Classic GSM + +GSM:: Global System for Mobile Communications (was: Groupe Special Mobile) + +Network is split in + +BSS:: Base Station Subsystem +NSS:: Network Switching Subsystem + +== Classic GSM Networks: Subscriber Side + +ME:: Mobile Equipment +SIM:: Subscriber Identity Module +MS:: Mobile Station (ME + SIM) + +Um:: User interface (mobile) + +== Classic GSM Networks: BSS + +BSS:: Base Station Subsystem + +BTS:: Base Transceiver Station +Abis:: Interface BTS - BSC +BSC:: Base Station Controller +A:: Interface BSC - MSC + +== Classic GSM Networks: NSS + +MSC:: Mobile Switching Center +VLR:: Visitor Location Register +HLR:: Home Location Register +SMSC:: SMS Service Center + +== GPRS extends GSM + +CCU:: Circuit Control Unit +PCU:: Packet Control Unit +Gb:: Interface PCU - SGSN +SGSN:: Serving GPRS Support Node +GGSN:: Gateway GPRS Support Node + +== UMTS + +UMTS:: Univesal Mobile Telephony System +WCDMA:: Wideband Carrier Division Multiple Access + +Network is split in RAN + CN + +RAN:: Radio Access Network +CN:: Core Network + +== UMTS Subscriber Side + +ME:: Mobile Equipment (no change) +UICC:: Univresal Integrated Chip Circuit +USIM:: UMTS SIM (Application on UICC), successor of SIM +UE:: User Equipment (Successor of MS) + +Uu:: User interface, universal. Successor of Um + +== UMTS Radio Access Network (RAN) + +RAN:: Successor of BSS +GERAN:: GPRS/EDGE RAN (legacy part) +UTRAN:: Universal Telephony RAN (UMTS RAN) +NodeB:: Successor of BTS +Iub:: Interface NodeB - RNC (Successor of Abis) +RNC:: Successor of BSC +Iu-CS:: Interface RNC - MSC (Successor of A) +Iu-PS:: Interface RNC - SGSN (Successor of Gb) + +== UMTS Core Netwokr (CN) + +MSC:: Mobile Switching Center +VLR:: Visitor Location Register +HLR:: Home Location Register +SMSC:: SMS Service Center +SGSN:: Serving GPRS Support Node +Gn:: Interface between SGSN and GGSN +GGSN:: Gateway GPRS Support Node + +(no acronym changes) + +== UMTS Release 4 + +The MSC functionality is split between control and user plane; + +MSS:: Mobile Switching Center Server +MGW:: Media GateWay + +== LTE (Long Term Evolution) + +After your network is already universal, what else can happen? It +*evolves*... + +LTE UE:: UserEquipment (no rename) +LTE Uu:: LTE User interface (universal) +E-UTRAN:: Evolved UTRNA (successor to UTRAN) +eNodeB:: Evolved NodeB (successor to NodeB) +S1:: Interface between eNodeB and MME (successor to Iu-PS) + +== LTE (Long Term Evolution) + +MME:: Mobility Management Engine (partial successor to SGSN) +S11:: Interface between MME and S-GW +S-GW:: Serving GateWay (partial successor to SGSN) +S5:: Interface between S-GW and P-GW (successor to Gn) +P-GW:: Packet Data Network GateWay (successor to GGSN) + +(RNC has completely been removed, eNodeBs arrange hand-overs directly +among each other) + +== Radio Interface Protocol Stacks + +[options="header"] +|=== +| GSM | GPRS | UMTS | LTE +| - | SNDCP | PDCP | PDCP +| RR | GRR | RRC | LTE RRC +| LAPD | RLC/MAC | RLC/MAC | LTE RLC/MAC +| Um | Um | Uu | LTE Uu +|=== + +== Radio Interface Logical Channels + +[options="header"] +|=== +| GSM | GPRS | UMTS | LTE +| BCCH | (P)BCC | BCCH | BCCH +| CCCH | (P)CCCH | CCCH | CCCH +| SDCCH | - | DCCH | DCCH +| TCH | - | DTCH | DTCH +| - | PCCH | PCCH | PCCH +|=== + +In GSM, logical channels are directly on top of the physical layer, +while UMTS and LTE introduce complex physica and transport channel +concepts underneath the logical channel. + +== UMTS Physical / Transport / Logical Channels + +image::765px-UMTS_Channels.svg.png[] + +By Timothy Colgan - Own work, CC BY-SA 3.0, +https://commons.wikimedia.org/w/index.php?curid=19454393 + + +== The End + +Questions? |
