What are HLR and VLR explain the function of HLR and VLR?
In general, HLR contains information about all subscribers within a network, while VLR contains more dynamic information relevant to subscribers roaming within the VLR area. HLR acts as a fixed reference point for a particular mobile station (subscriber), while its VLR can vary depending on mobility and network design.
What is HLR VLR and AUC?
Role of HLR VLR and AUC: It gives the information of the subscriber to the msc. When a user want to connect call then BSC transfer the call to the msc, MSC wants information whether the subscriber is from the same msc or from other for this MSC call to the HLR and VLR.
What are the three main parts of a GSM architecture or structure?
The GSM architecture consists of three major interconnected subsystems that interact with themselves and with users through certain network interface. The subsystems are Base Station Subsystem (BSS), Network Switching Subsystem (NSS) and Operational Support Subsystem (OSS).
What is GSM frame structure?
The GSM frame structure is designated as hyperframe, superframe, multiframe and frame. The minimum unit being frame (or TDMA frame) is made of 8 time slots. One GSM hyperframe composed of 2048 superframes. Each GSM superframe composed of multiframes (either 26 or 51 as described below).
What is HLR VLR and AuC?
What is LTE frame structure?
In LTE, DL and UL transmissions are organized into radio frames of 10 ms each. Each frame is divided into ten equally sized subframes. The duration of each subframe is 1 ms. Moreover, each subframe is further divided into two equally sized time slots, that is, each slot is 0.5 ms.
What is the role of VLR in GSM architecture?
VLR ( visitor location register): it is the component of gsm architecture. VLR is connected with MSC and contain information about the mobile subscriber which came from the other MSC. when the subscribe from other MSC came into the MSC the MSC want the information of that user and it calls to the vVLR and BSC for this.
What is GSM and its architecture?
GSM is an open and digital cellular technology used for mobile communication. It uses 4 different frequency bands of 850 MHz, 900 MHz, 1800 MHz and 1900 MHz . It uses the combination of FDMA and TDMA. This article includes all the concepts of GSM architecture and how it works.
How is GPRS different from GSM?
The GSM is a circuit-switched type of network. The GPRS is a packet-switched type of network. The GSM technology provides a data rate of about 9.6 kbps (kilobytes per second) for all of its users. The GPRS technology provides a data rate of about 14.4 kbps to 115.2 (kilobytes per second) for all of its users.
What is MIB and SIB in LTE?
Carries physical layer information of LTE cell which in turn help receive further SIs, i.e. system bandwidth. SIB1. Contains information regarding whether or not UE is allowed to access the LTE cell. It also defines the scheduling of the other SIBs.
How many types of frame structures are there?
In general, there are two main categories of frame structures, namely the braced frame structure and rigid frame structure.
What is FCCH and SCH in mobile computing?
The group of Broadcast Channel is subdivided into three channels: Broadcast Control Channel (BCCH) Frequency Correction Channel (FCCH) Synchronization Channel (SCH)
What is Sdcch in GSM?
Standalone Dedicated Control Channel. This channel is used in the GSM system to provide a reliable connection for signalling and SMS (Short Message Service) messages. The SACCH (Slow Associated Control Channel) is used to support this channel.
What is the use of HLR?
The Home Location Register (HLR) is the main database of permanent subscriber information for a mobile network. The HLR is an integral component of CDMA (code division multiple access), TDMA (time division multiple access), and GSM (Global System for Mobile communications) networks.
What is the difference between HLR and VLR?
Capacity of HLR and VLR can directly affect the subscriber capacity of the mobile network operator. HLR contains entries for each and every subscriber (MSISDN Number) within a mobile network. Mostly HLR contains static and permanent information about a subscriber.
What is the impact of HLR and VLR on subscriber capacity?
Capacity of HLR and VLR can directly affect the subscriber capacity of the mobile network operator. HLR contains entries for each and every subscriber (MSISDN Number) within a mobile network.
What is HLR and how does it work?
HLR stores a teleservice list for Voice and SMS. Upon location update the list of services is transferred to VLR/MSC, then the roaming network uses the information to allow or disallow the call. The following are the key parameters stored in HLR.
What is HLR lookup in VoIP?
Real-Time Information, HLR Lookup, provides real-time information for a roaming subscriber, this enables the service user to plan advertisements according to the roaming places. Used by VoIP providers, A VoIP provider, e.g. Skype, can make a lookup before terminating a call to the roaming device.