What is attach type in LTE?
There are three different types of attach as listed below. EPS attach : indicate the attach for EPS services only) Combined EPS/IMSI attach : indicate the attach for both EPS and non-EPS services. EPS emergency attach : indicate the attach for emergency bearer services.
What is Emergency Attach in LTE?
The attach type IE is used for signaling either a “combined” or “emergency” attach. A UE that is “combined” attached might send a PDN connectivity request for emergency bearer services. After setup of such a bearer, if CSFB is requested, CSFB procedure will proceed with no interaction.
What are the details sent to Enodebs during initial attach request?
The eNodeB sends the RRC Connection Reconfiguration message including the EPS Radio Bearer Identity to the UE, and the Attach Accept message will be sent along to the UE.
What is attach request?
Attach Request is a NAS layer message procedure. It will be initiated by UE to MME. As eNB will not have NAS protocol, the Attach request will be included inside RRC Connection Setup Complete message. “dedicatedInfoNAS” is the Information Element inside RRC Connection Setup Complete.
What SDF means?
Service Data Flow. Describes a flow of packets which represent a service being delivered to a subscriber, such as a flow of voice packets associated with a call or streaming data from a website.
What is attach procedure?
LTE attach procedure is the procedure in which the UE registers to the network, and creates the EPS Bearer between the UE and the PGW, in order to be able to send and receive data, to and from the PDN.
What is initial attach?
Cases of Initial Attach. When a UE initially attaches to a network, an MME initiates a different procedure depending on the type of such attach. The procedure begins when a user sends an Attach Request message to an MME, and ends when the MME returns an Attach Accept message to the UE.
What is SDF and TFT in LTE?
SDF(service data flow) are used to map packets to the TFT(traffic flow template) based on 5 tuples and TFT is responsible for maping packet to the respective bearer which matches the QOS of bearer and the packet.
What is SDF and MSF?
The SDF will replace the fixed rate reverse repo (FRRR) as the floor of the liquidity adjustment facility corridor. Both the standing facilities — the MSF (marginal standing facility) and the SDF will be available on all days of the week, throughout the year.
What is modified bearer in LTE?
· The purpose of the EPS bearer context modification procedure is to modify an EPS bearer context with a specific QoS and TFT. · This procedure is initiated by the network, but it may also be initiated as part of the UE requested bearer resource allocation/modification procedure.
Why SDF is introduced?
SDF is designed to absorb surplus liquidity which is transient in nature reflected in the increase in deposits of the government with the RBI.
What is SDF full form?
The Reserve Bank of India (RBI) on April 8 announced the introduction of the standing deposit facility (SDF) as the basic tool to absorb excess liquidity under the new monetary policy.