Table of Contents
- 1 What is intra RAT handover?
- 2 Which type of handover happens between 3g and 4G?
- 3 What is MME and HSS?
- 4 What is CSFB in telecom?
- 5 What is intra cell handover in LTE?
- 6 What is the difference between HLR and HSS?
- 7 What is intra-rat handover in 3G?
- 8 When to delay sending the inter-rat measurement report?
What is intra RAT handover?
1) Intra-RAT handover: This is a handover that occurs within the LTE system in which node transition occurs between sectors within an eNodeB, between eNodeBs within an EPC switch, or between EPC switches. A handover between eNodeBs within an EPC switch may be an X2 or S1 handover.
What is inter rat?
Inter-RAT (IRAT) handover A mobile terminal, while connected using a RAT, performs neighbour cell measurements and sends measurement report to the network. Based on this measurement report provided by the mobile terminal, the network can initiate handover from one RAT to another, e.g. from WCDMA to GSM or vice versa.
Which type of handover happens between 3g and 4G?
UMTS inter RAT handover: This form of handover occurs when mobiles have to change between Radio Access Technologies, e.g. UMTS to / from GSM or UMTS to / from 4G LTE, etc..
What are the types of handover in LTE?
LTE supports two types of handover: X2-based handover and S1-based handover.
What is MME and HSS?
The MME is the key control-node for the LTE access-network. It is responsible for idle mode User Equipment (UE) paging and tagging procedure including retransmissions. The MME also terminates the S6a interface towards the HSS for roaming UEs.
What are the different types of handover in GSM?
There are two types of handover. Soft handover and hard handover. Hard handover: hard handover is one in which the channel source cell is released before the channel in the target is engaged.
What is CSFB in telecom?
Circuit Switched Fallback (CSFB), with the help of a global system for mobile communication (GSM) or another circuit-switched network, delivers voice and SMS services to LTE devices. The necessity for a Circuit Switch FallBack for the packet-based all-IP network, LTE, which cannot support circuit-switched calls.
What is rat type in 3GPP?
The RAT-Type AVP (AVP code 1032) is of type Enumerated and is used to identify the radio access technology that is serving the UE. NOTE 2: Values 1000-1999 are used for 3GPP specific radio access technology types. NOTE 3: Values 2000-2999 are used for 3GPP2 specific radio access technology types.
What is intra cell handover in LTE?
The Intra Cell Handover functionality gives the user the ability to perform CS handovers procedures in the same Cell.
What is 3G handover?
Handovers are an important part of every cellular communication system. They are used for providing mobility in cellular architectures. The whole process of tearing down the existing connection in the current cell and establishing a new connection in the appropriate cell is called “handover”.
What is the difference between HLR and HSS?
HLR Home Location Register: HLR is a subscriber database in GSM architecture that contains the subscriber profiles and information about the subscriber’s physical location. HSS Home Subscriber Server: HSS is a subscriber database in UMTS architecture that is similar to the GSM Home Location Register (HLR).
What is the difference between GGSN and PGW?
P-GW—In 2G and 3G networks, the node that handled all user packets to and from the user equipment is called the GGSN. In the LTE architecture, this is the Packet Gateway (P-GW) or sometimes seen as the Packet Data Network Gateway (PDN-GW).
What is intra-rat handover in 3G?
Intra-RAT handover occurs when a user moves from one 3G cell to another. The user, in this case remains in the 3G network. Network designers try to ensure that the network has enough resources to carry out an Intra-RAT handover as Inter-RAT can result in the call being dropped at times.
What is inter rat handover between GSM and GSM-WCDMA?
Handover between GSM-WCDMA •Limited UMTS coverage •UMTS network busy whereas spare capacity is available on GSM network •Two types of Inter RAT handover: 1-GSM to UMTS 2-UMTS to GSM UMTS to GSM handover
When to delay sending the inter-rat measurement report?
The method of claim 1, further comprising: delaying sending the inter-RAT measurement report when a current call is in the call setup or when at least one of the UE, the serving network or the target network do not support the inter-RAT handover during the call setup. 9.
What is the difference between intra-LTE handover and inter-LTE handover?
Intra-LTE Handover: In this case source and target cells are part of the same LTE network. Inter-LTE Handover: Handover happens towards other LTE nodes. (Inter-MME and Inter-SGW)