What is S1AP in LTE?
The S1 Application Protocol (S1AP) provides the control plane signalling between E-UTRAN and evolved packet core (EPC). The used interface is S1-MME which is located between eNB and MME. The S1AP protocol provides transport function between UE and MME by offering NAS signalling transport.
What is a S1 connection?
The S1 interface supports a multipoint connection among MMEs/serving gateways and eNBs. The S1-MME is responsible for EPC bearer setup and release procedures, HO signaling, paging, and non-access stratum (NAS) signaling transport.
What is S1 setup request?
This message is sent by the eNB to transfer information for a TNL association.
What is the air interface between eNodeB and user equipment UE?
2.1 LTE Protocol Stack The LTE (long term evolution) air interface provides connectivity between the user equipment (UE) and the eNB (eNodeB). It is split into a control plane and a user plane, as described in Chapter 1.
What is MME UE S1AP ID?
The MME-UE-S1AP-ID IE uniquely identifies the UE association over the S1 interface within the MME.
What are LTE protocols & specifications?
What are LTE protocols & specifications?
- Air Interface Physical Layer.
- GPRS Tunnelling Protocol User Plane (GTP-U)
- GTP-U Transport.
- Medium Access Control (MAC)
- Non-Access-Stratum (NAS) Protocol.
- Packet Data Convergence Protocol (PDCP)
- Radio Link Control (RLC)
- Radio Resource Control (RRC)
What is the architecture of 4G?
The high-level network architecture of LTE is comprised of following three main components: The User Equipment (UE). The Evolved UMTS Terrestrial Radio Access Network (E-UTRAN). The Evolved Packet Core (EPC)….2G/3G Versus LTE.
| 2G/3G | LTE |
|---|---|
| GGSN/PDSN-HA | PDN-GW |
| HLR/AAA | HSS |
| VLR | MME |
| SS7-MAP/ANSI-41/RADIUS | Diameter |
What is UE context in 5G?
The UE signals the completion of the NAS security procedure. The message contains the IMEISV. 12:Namf_Communication_RegistrationComplete_Notify Since the AMF has changed the new AMF notifies the old AMF that the registration of the UE in the new AMF is completed. 5G-EIR.
What is downlink NAS transport?
The Downlink NAS Transport procedure is used when the AMF only needs to send a NAS message transparently via the NG-RAN node to the UE, and a UE-associated logical NG-connection exists for the UE or the AMF has received the RAN UE NGAP ID IE in an INITIAL UE MESSAGE message or if the NG-RAN node has already initiated a …
What is eNodeB in LTE?
eNodeB is a 3GPP-compliant implementation of 4G LTE base station. It consists of independent Network Functions, which implement 3GPP-compliant LTE RAN protocols namely: PHY, MAC, RLC, PDCP, RRC, S1AP see Figure below.
How does UE connect to eNodeB?
UE establishes the RRC Connection with the eNodeB. 2. The UE sends the ATTACH REQUEST message together with a PDN CONNECTIVITY REQUEST for the PDN (IP) connectivity on the established RRC Connection. As part of this, the eNodeB establishes the S1 logical connection with the MME for this UE.
Do the S1 interface applications include support for s1-ap elementary procedures?
The S1 Interface Applications include support of the S1-AP Elementary Procedures as defined in TS 36.413, TS 23.401 and TS 23.682.
How does the S1 interface work?
The S1 interface supports a multi-point connection among MMEs/S-GWs and eNBs. The S1-MME carries S1 application protocol (S1-AP) messages, using SCTP2 over IP to provide guaranteed data delivery. Each SCTP association between an eNB and an MME can support multiple UEs.
What is S1AP (S1AP)?
The S1 Application Protocol (S1AP) provides the control plane signalling between E-UTRAN and evolved packet core (EPC). The used interface is S1-MME which is located between eNB and MME.
What is the S1 application protocol?
The S1 Application Protocol (S1AP) provides the control plane signalling between E-UTRAN and evolved packet core (EPC).