Paging in LTE network is used to inform and notify UE about various events. The propose of paging procedure is: … To inform UE about ETWS primary notification and ETWS secondary notification. To inform CMAS notification.
What is paging in 5G NR?
Directional air interface in 5G communications. Paging is an important mechanism that helps with directing an incoming call to a UE when it is an Idle mode DRX (IDRX) to conserve energy. Network broadcasts the paging messages in the cells to convey an intimation about the incoming call to the UE in IDRX mode [9].
Which node initiates paging when you is getting incoming call?
There are two types of paging with respect to which node will initiate paging i.e., eNodeB initiated Paging and MME initiated paging. This paging is used to inform a UE about : Change in system information. Emergency notifications.
What is NB in paging?
NB: This parameter depicts the number of paging subframes within a Default Paging Cycle. If NB is set equal to T, then every frame contains one Paging subframe. If NB is set to 2T, then every frame will contain 2 paging subframes. If NB is set to 1/2T then every second frame will have a paging subframe.What is idle mode DRX?
DRX can be employed in both idle and connected modes in LTE, but the exact functionality differs to some extent. In idle mode, the DRX cycle is the same thing as the paging cycle, as the UE expects to only receive paging messages. The UE reads the paging channel at certain subframes within specific radio frames.
What is 5G S TMSI?
The 5G S-TMSI is a shortened version of the 5G-GUTI, designed to facilitate efficiency in radio signalling procedures such as Paging and Service Request.
What is paging message?
Paging is the mechanism in which Network tells UE saying “I have something for you”. Then UE decode the content (Paging Cause) of the Paging message and UE has to initiate the appropriate the procedure. In most cases, this paging process happens while UE is in idle mode.
What is Guti in LTE?
In LTE, the GUTI is the Globally Unique Temporary ID, and identifies the mobile device to the LTE network. … By allocating a temporary ID to the device, the MME maintains the security of the IMSI (International Mobile Subscriber Identification) when transmitting over radio interface.What is LTE UE?
In the Universal Mobile Telecommunications System (UMTS) and 3GPP Long Term Evolution (LTE), user equipment (UE) is any device used directly by an end-user to communicate. It can be a hand-held telephone, a laptop computer equipped with a mobile broadband adapter, or any other device.
What is SIB1 in LTE?SystemInformationBlockType1 (SIB1) contains information relevant when evaluating if a UE is allowed to access a cell. Also, it supplies the UE with the scheduling of other system information.
Article first time published onWhat happens when UE is switched on in LTE?
A UE performs cell search on all frequencies before selecting or re-selecting to a cell. In an LTE system, two types of synchronization signals for cell search: primary synchronization signals (PSS) and secondary synchronization signals (SSS). … The UE calculate the PCI by using (3 x cell group number + cell number) .
What is LTE handover?
Abstract: Handover in LTE occurs when a device moves from the cell coverage serving it towards another; a process where the user established session must not be interrupted due to this cell change.
How UE is connected 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.
What is paging time window?
ptwSpecifies the Paging Time Window (PTW) value received from the UE in the Attach REquest/TAU Request message. The PTW value is an integer ranging from 0 to 20 seconds. … MME sends Downlink Buffer Duration IE in Downlink Data Notification Acknowledgment message to the gateway when MME is unable to page the UE.
What is inactivity timer in LTE?
When the eNodeB detects a UE which does not have any traffic to send and receive during a defined period of time, usually referred to an inactivity timer (20s, 10s etc…) which is defined in eNodeB and also is configurable, then the eNB can initiate procedures to place the UE in idle mode.
What is PSF LTE?
psf is a PDCCH subframe in which UE listens for PDCCH. In FDD every subframe is a DL/UL subframe so every subframe can be a psf whereas in TDD, only DL subframes are considered to be psfs.
What is TMSI in GSM?
The Temporary Mobile Subscriber Identity (TMSI) is a temporary identification number that is used in the GSM network instead of the IMSI to ensure the privacy of the mobile subscriber. The TMSI prohibits tracing of the identity of a mobile subscriber by interception of the traffic on the radio link.
What is AMF region ID?
AMF Region ID addresses the case that there are more AMFs in the network than the number of AMFs that can be supported by AMF Set ID and AMF Pointer by enabling operators to re-use the same AMF Set IDs and AMF Pointers in different regions.
What is P TMSI?
The P-TMSI is a temporary identity issued to a GPRS enabled mobile, unique within a given RA (Routing Area), and is used by the GPRS network to page the specified mobile. The P-TMSI is comprised of 32bits and is associated with the TLLI (Temporary Logical Link Identifier).
What happens while UE first time switch on?
When the UE powers on, it checks if it is possible to camp on the last registered PLMN (Public Land Mobile Network). If no any stored system on the UE, UE will perform the initial cell selection: Scan all RF frequencies band (ex 900MHz,1800MHz,1900MHz….) and which band are using by network.
What is evolved Node B?
E-UTRAN Node B, also known as Evolved Node B (abbreviated as eNodeB or eNB), is the element in E-UTRA of LTE that is the evolution of the element Node B in UTRA of UMTS. … Traditionally, a Node B has minimum functionality, and is controlled by a Radio Network Controller (RNC).
What LTE category is 5G?
Similar to 4G, 5G doesn’t have a particular technical meaning and is really just a broad group of “5th Generation” cellular technologies.
What is the use of Plmn?
A public land mobile network (PLMN) is any wireless communications system intended for use by terrestrial subscribers in vehicles or on foot. Such a system can stand alone, but often it is interconnected with a fixed system such as the public switched telephone network (PSTN).
What is Guti and Gummei?
The GUTI (Globally Unique Temporary Identity) has two main components, the GUMMEI (Globally Unique MME Identifier) that uniquely identifies the MME that allocated the GUTI and the M-TMSI (M-Temporary Mobile Subscriber Identity) that provides for an unambiguous identity of the UE within this MME.
What is Plmn selection in LTE?
PLMN stands for Public Land Mobile Network. The LTE compliant UE is responsible for selecting a PLMN for subsequent cell selection. A PLMN is identified by its PLMN identity broadcast within SIB-1. A single cell can belong to multiple PLMNs, so SIB-1 may broadcast a list of PLMN identities.
What is MIB and SIB?
System information also provides the parameters necessary to access the network and detect paging messages ” System information is broadcast using a Master Information Block (MIB) and a series of System Information Blocks (SIB).
What is difference between MIB and SIB in LTE?
Static part is called as MIB and is transmitted using BCH and carried by PBCH once every 40ms. … Dynamic part is called as SIB and is mapped on RRC SI messages(SI-1,2,3,4,5,6,7,8,9,10,11) over DL-SCH and transmitted using PDSCH at periodic intervals. SI-1 transmitted every 80ms, SI-2 every 160ms and SI-3 every 320 ms.
What MIB contains in LTE?
In LTE, MIB contains very limited information. It contains information about the cell bandwidth, some information about PHICH (Physical HARQ Indicator Channel) and the SFN. The SIB’s as I mentioned are transmitted on DL-SCH mapped on PDSCH.
What is PSS and SSS in LTE?
In LTE, there are two downlink synchronization signals which are used by the UE to obtain the cell identity and frame timing. Primary synchronization signal (PSS) Secondary synchronization signal (SSS)
What does camping on a cell mean?
“Camp on” is the UE state in which the UE stays on a cell and is ready to initiate a potential dedicated service or to receive an ongoing broadcast service. Camping on a cell by the UE in RRC_IDLE has several purposes: reception of system information for the camped cell (see Section 3.2);
What is idle mode and connected mode in LTE?
LTE has specified two UE states i.e. Idle mode and connected mode to avoid unnecessary signalling. When the UE does not have any data to send it is said to be in idle mode, and when the data is being send or communication is taking place then the UE is said to be in connected state.
