Difference between revisions of "LTE"
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+ | {| | ||
+ | |- | ||
+ | |[[image:LTE1.png|thumb|left|600px|EPS Network elements]] | ||
+ | |- | ||
+ | |[[image:LTE2.png|thumb|left|600px|Functional split between E-UTRAN and EPC]] | ||
+ | |- | ||
+ | |[[image:LTE3.png|thumb|left|300px|Overall E-UTRAN architecture]] | ||
+ | |- | ||
+ | |[[image:LTE4.png|thumb|left|600px|Roaming architecture for 3GPP access with P-GW in home network]] | ||
+ | |- | ||
+ | |[[image:LTE5.png|thumb|left|600px|Architecture for 3G UMTS internetworking]] | ||
+ | |- | ||
+ | |[[image:LTE6.png|thumb|left|600px|The E-TRAN user plane protocol stack]] | ||
+ | |- | ||
+ | |[[image:LTE7.png|thumb|left|600px|The E-TRAN control plane protocol stack ]] | ||
+ | |- | ||
+ | |[[image:LTE8.png|thumb|left|600px|Standardized QCIs for LTE (QoS)]] | ||
+ | |- | ||
+ | |[[image:LTE9.png|thumb|left|600px|LTE/SAE bearer across the different interfaces]] | ||
+ | |- | ||
+ | |[[image:LTE10.png|thumb|left|600px| Example message flow for a LTE/SAE bearer establishment]] | ||
+ | |- | ||
+ | |[[image:LTE11.png|thumb|left|300px|S1 - Control plane protocol stack]] | ||
+ | |- | ||
+ | |[[image:LTE12.png|thumb|left|300px|S1-U user plane protocol stack]] | ||
+ | |- | ||
+ | |[[image:LTE13.png|thumb|left|600px|S1 based handover procedure]] | ||
+ | |- | ||
+ | |[[image:LTE14.png|thumb|left|600px|X2 based handover procedure]] | ||
+ | |- | ||
+ | |} | ||
=Abbreviations= | =Abbreviations= | ||
{|border=1 ;style="margin: 0 auto; text-align: center;cellpadding="5" cellspacing="0" | {|border=1 ;style="margin: 0 auto; text-align: center;cellpadding="5" cellspacing="0" | ||
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| EUTRAN ||Evolved UTRAN || | | EUTRAN ||Evolved UTRAN || | ||
|- | |- | ||
− | |||
| EPC || Evolved Packet Core || | | EPC || Evolved Packet Core || | ||
|- | |- | ||
− | |||
| CN || Core Network || | | CN || Core Network || | ||
|- | |- | ||
| QoS ||Quality of Service || | | QoS ||Quality of Service || | ||
|- | |- | ||
+ | | P-GW || PDN Gateway || Responsible for IP address allocation for the UE and enforment of QoS | ||
+ | |- | ||
+ | | S-GW || Serving Gateway || All UE IP packets pass through the S-GW. Serves as UE anchor as UE moves between e-NodeBs | ||
+ | |- | ||
+ | |eNodeB || Evolved Node B || The hardware that communicates directly to the UE | ||
+ | |- | ||
+ | | PCRF || Policy Control and Charging Rules || Provides the QoS classification and bit rate | ||
+ | |- | ||
+ | | HSS || Home Subscriber Server || Contains users SAE subscription, such as QoS profile | ||
+ | |- | ||
+ | | MME || Mobility Management Entity || Control node processing the signaling between the UE and CN | ||
+ | |- | ||
+ | | NAS || Non Access Stratum || The protocols running between the UE and CN | ||
+ | |- | ||
+ | | S-TMSI || SAE Temporary Mobile Subscriber Identity || Identifies the UE to the MME | ||
+ | |- | ||
+ | | TA || Tracking Area || A logical concept of an area where a user can move around without updating the MME | ||
+ | |- | ||
+ | | AS || Access Stratum || Acts as data link layer between UE and S-GW | ||
+ | |- | ||
+ | | NAS || Non Access Stratum Protocol || Support mobility between UE and P-GW | ||
+ | |- | ||
+ | | X2 || Interface between eNodeBs || Handover coordination | ||
+ | |- | ||
+ | | S1-MME || Control Interface between eNodeBs and MME<ref>[http://lteworld.org/forums/lteworld-forum/how-ue-attach-lte-network lteworld on UE attach]</ref>|| | ||
+ | |- | ||
+ | | S1-U || User plane Interface || between eNodeBs and S-GW. User data to Gateway | ||
+ | |- | ||
+ | | RRM || Radio Resource Management || All functions related to radio bearer control to UE's | ||
+ | |- | ||
+ | | RAN ||Radio Access Network || Protocols layers between EnodeBs and UEs (All controlled by EnodeBs) | ||
+ | |- | ||
+ | | PLMN || Public Land Mobile Network || A network run by an operator in on country | ||
+ | |- | ||
+ | | RAT || Radio Access Technology || Such as 2G, 3G GRPS/UMTS, LTE | ||
+ | |- | ||
+ | | PMIP || Proxy Mobile IP || Home P-GW acts as IP proxy for UE on other RAT's | ||
+ | |- | ||
|} | |} | ||
+ | |||
+ | =Links= | ||
+ | *[http://lteworld.org/lte-protocols-specifications lteworld.org LTE Protocols & Specifications] ***** | ||
+ | *[http://www.roke.co.uk/resources/white-papers/0485-LTE-Radio-Bearer-QoS.pdf White Paper: Radio baerer QoS] | ||
+ | |||
=References= | =References= | ||
<references/> | <references/> | ||
+ | |||
+ | [[Category:LTE]] |
Latest revision as of 11:59, 22 January 2014
Abbreviations
Abb. | meaning | Notes |
---|---|---|
LTE | Long Term Evolution | The evolution of UMTS - Often refered to as 4G Mobile network |
SAE | System Architecture Evolution | The "non-radio" part of the network |
EPS | Evolved Packet System | EPS is the network consisting of LTE and SAE[1] |
UE | User Equipment | Typically mobile units |
PDN | Packet Data network | IP based network |
UMTS | Universal Mobile Telecommunications Network | Often refered to as 3G Mobile network |
UTRAN | Universal Terrestrial Radio Access Network | The radio technology used between mobile terminals and the access network |
EUTRAN | Evolved UTRAN | |
EPC | Evolved Packet Core | |
CN | Core Network | |
QoS | Quality of Service | |
P-GW | PDN Gateway | Responsible for IP address allocation for the UE and enforment of QoS |
S-GW | Serving Gateway | All UE IP packets pass through the S-GW. Serves as UE anchor as UE moves between e-NodeBs |
eNodeB | Evolved Node B | The hardware that communicates directly to the UE |
PCRF | Policy Control and Charging Rules | Provides the QoS classification and bit rate |
HSS | Home Subscriber Server | Contains users SAE subscription, such as QoS profile |
MME | Mobility Management Entity | Control node processing the signaling between the UE and CN |
NAS | Non Access Stratum | The protocols running between the UE and CN |
S-TMSI | SAE Temporary Mobile Subscriber Identity | Identifies the UE to the MME |
TA | Tracking Area | A logical concept of an area where a user can move around without updating the MME |
AS | Access Stratum | Acts as data link layer between UE and S-GW |
NAS | Non Access Stratum Protocol | Support mobility between UE and P-GW |
X2 | Interface between eNodeBs | Handover coordination |
S1-MME | Control Interface between eNodeBs and MME[2] | |
S1-U | User plane Interface | between eNodeBs and S-GW. User data to Gateway |
RRM | Radio Resource Management | All functions related to radio bearer control to UE's |
RAN | Radio Access Network | Protocols layers between EnodeBs and UEs (All controlled by EnodeBs) |
PLMN | Public Land Mobile Network | A network run by an operator in on country |
RAT | Radio Access Technology | Such as 2G, 3G GRPS/UMTS, LTE |
PMIP | Proxy Mobile IP | Home P-GW acts as IP proxy for UE on other RAT's |