Empfohlen
Weitere ähnliche Inhalte
Was ist angesagt?
Was ist angesagt? (20)
Ähnlich wie LTE crash course
Ähnlich wie LTE crash course (20)
Kürzlich hochgeladen
Kürzlich hochgeladen (20)
LTE crash course
- 1. LTE, a crash course
- 2. LTE, A CRASH COURSE Long Term Evolution Backward compatibility Simplified architecture Higher throughput and lower latency 1
- 3. LTE, A CRASH COURSE First out TeliaSonera InOslo and Stockholm 14 December 2009 2
- 4. LTE, A CRASH COURSE Pre LTE Hirarchicalnetworks Physicaly separated Secure locations of devices Separate voice channel through curcit switching 3
- 5. LTE, A CRASH COURSE Architecture 4
- 6. LTE, A CRASH COURSE Level of Deployment 5
- 7. LTE, A CRASH COURSE Features High throughput Reduces latency Improved mobility Power conserving Flexible cell size Interoperability MBSFN 6
- 8. LTE, A CRASH COURSE Voice No native support Alternatives – VoLTE – Voice over LTE – CSFB – Circuit Switched Fallback – SVLTE – Simultaneous Voice and LTE – (Skype, Google Talk, WebRTC) 7
- 9. LTE, A CRASH COURSE Abbreviations E-UTRAN – Evolved UTRAN UE – User Equipment eNodeB – evolved NodeB SAE – System Architecture Evolution SWG – Serving Gateway MME – Mobile Management Entity HSS – Home Subscriber Server NAS – Non Access Stratum PGW – PDN Gateway 8
- 10. LTE, A CRASH COURSE Why is increased security needed? Antennas at public locations Transport over common networks Transport over know protocol stack 9
- 11. LTE, A CRASH COURSE How is increased security accomplished? Certificate and public key authentication of trusted network equipment IPSec from eNodeB Key hierarchy 10
- 12. LTE, A CRASH COURSE Nexus and LTE Protocol Gateway – Automatic Enrollment – Automatic Renewal – Support for both SCEP (draft23) and CMP (RFC4210) Verified supported eNodeBs – Ericsson RBS6000 release L12A (SCEP) – NSN eNB release REL30 (CMP) – Huawei eNB release eRAN 3.0 (CMP) – Juniper SRX (SCEP) 11
Hinweis der Redaktion
- When creating the new standard it needs to be able to coexist with existing standards to make transition posible (see ipv6)??With the increase of data traffic in mobile devices and the need for a better user experience (quicker load time).
- A 4G modem
- Old 3G architecture was hierarchicalAll connections had to go through the RNCWith LTE the architecture is flat and eNodeB´s can connect to each otherGives simpler networksLower latencyAnd higher throughputCoordination of handover is helped by
- 8 May 2012(red) Countries with commercial LTE service(blue) Countries with commercial LTE network deployment ongoing or planned(light blue) Countries with LTE trial systems(gray) none
- Down 300Mbit/s up 75Mbit/sSub 5ms for smallip-packages and lower setup and handover timeMove at speeds up to 500km/hBy using SC-FDMA on uplink power can be savedTens of meters to 100 km radius cellsCo-exist with legacy standards (GSM/EDGE, UMTS and CDMA200)Multicast-Broadcast single frequency network, possibility for mobile TV could compete with DVB-H
- LTE is IP based not circuit switched and has only support for data nativelyVoLTE = based on IMS (IP Multimedia Subsystem) a protocol above LTE packet systemCSFB = As it sounds fall back to the old Circuit Switched network as soon as the user wants to do a voice call. (longer call setup delay)SVLTE = use LTE foor data and CS for voice, phone has to selectSkype, Google Talk, WebRTC = The natural evolution, but will not happen soon since operators make much money on calls
- E-UTRAN = the air interface of LTE, will replace old UMTS, HSDPA and HSUPA, higher throughput and lower latencyUE = User Equipment, i.e. the phone or modemeNodeB = E-UTRAN NodeB or Evolved Node B, is the component within the E-UTRAN that communicates with UEs, it is the antennaSAE = This is the name for the core network architectureSWG = Routes user data, anchor in handovers, and MME = A control node, UE authentication, internal handover controll between eNB, handle idle UE, select SWG for UE after authenticationHSS = Database for user/subscriber informationNAS = Mobility and the session management between UE and MME, establish and maintain IP connectivity between UE and PGWPGW = connection to the rest of the world
- With the increased number of devices that will connect we will need to have antennas in more placesAs the protocol is ip based we can connect to common networks for the transport and a secure channel will be established over IPSecSince it is transported over IP there exists a vide range of tools to analyze and attack the traffic
- PKI to setup trustedCommunication from antennas to MME and SWGComplex key hierarchy's to give two way authentication all the way through the network