Difference between revisions of "LTE"
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Revision as of 08:35, 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 |