Maciej Stasiak, Mariusz Głąbowski Arkadiusz Wiśniewski, Piotr Zwierzykowski Modeling and Dimensioning of Mobile Networks: from GSM to LTE.

Slides:



Advertisements
Similar presentations
GSM infrastructure MSC, BSC, BTS, VLR, HLR, GSGN, GSSN
Advertisements

General Packet Radio Service (GPRS)
Tutorial 6 Mobile Communication Networks Mohamed Esam.
An Overview of GPRS Shourya Roy Pradeep Bhatt Gururaja K.
Islamic University-Gaza Faculty of Engineering Electrical & Computer Engineering Department Global System for Mobile Communication GSM Group Alaa Al-ZatmaHosam.
CELLULAR COMMUNICATIONS GSM/GPRS/EDGE. Groupe Speciale Mobile/Global System for Mobile.
GSM Global System for Mobile Communications
1 Channel Overview 3 Types 1.Broadcast Control Channel: Point to Multipoint, Downlink (BTS) to MS) (A)BCCH (Board cast Control Channel) It inform the Mobile.
GSM System Architecture
Telefónica Móviles España GPRS (General Packet Radio Service)
Lecture 13 – Evolution of Cellular Systems Introduction 1st Generation cellular systems 2nd Generation cellular systems 3rd Generation cellular systems.
Mobile Communication MMS / GPRS. What is GPRS ? General Packet Radio Service (GPRS) is a new bearer service for GSM that greatly improves and simplifies.
Sami Alanazi Net-535 –Fall 2013 Princess Nora University.
Lecture 12: NMT, GSM, UMTS Anders Västberg Slides are a selection from the slides from chapter 10 from:
GSM—Global System for Mobile. 2 How does GSM handle multiple users The 1G cellular systems used FDMA. The first cellular standard adopting TDMA was GSM,
GSM standard (continued)
The Wireless Communication System Xihan Lu. Wireless Communication Cellular phone system Cordless telephone system Bluetooth Infrared communication Microwave.
Mobile Communication Division
GSM Security Overview (Part 1)
GPRS Muhammad Al-khaldi Sultan Al-Khaldi
Cellular Mobile Communication Systems Lecture 7
Mobile Handset Cellular Network Basics + GSM. Cellular Network Basics There are many types of cellular services; before delving into details, focus on.
MOBILE PHONE ARCHITECTURE & TECHNOLOGY. HISTORY  The idea of the first cellular network was brainstormed in 1947  Disadvantages  All the analogue system.
 The GSM network is divided into two systems. each of these systems are comprised of a number of functional units which are individual components of the.
General Packet Radio Service (GPRS) A new Dimension to Wireless Communication.
Cellular Phone Networks Some slides are based on: Computer Networking: A Top Down Approach Featuring the Internet, 3rdedition. Jim Kurose, Keith RossAddison-Wesley,
Evolution from GMS to UMTS
1 © 2007 Nokia Optimization of EGPRS Link Adaptation Thesis work presentation Author: Jussi Nervola Supervisor:Professor.
Wireless Networks Instructor: Fatima Naseem Computer Engineering Department, University of Engineering and Technology, Taxila.
GSM Continued.
Lectured By: Vivek Dimri Assistant Professor, CSE Dept. SET, Sharda University, Gr. Noida.
GSM,GPRS & CDMA Technology
Presentation by Papua New Guinea Telecommunication & Radiocommunication Technical Authority (PANGTEL) For: PNG COMPUTER SOCIETY ANNUAL SEMINAR, 4th November.
GSM Signaling Protocol Architecture. Protocols above the link layer of the GSM signaling protocol architecture provide specific functions: Radio Resource.
Polytechnic University1 GSM MAC Original by: Ahmed Ibrahim, Chang Wu Ma, Danny Mangra, EL604, Fall 2001; Modified by Prof. M. Veeraraghavan Architecture.
Network components of the Switching Subsystem The switching Subsystem comprises the following subsystems. MSC (Mobile Switching Centre) HLR (Home location.
Speech decoding Channel decoding De-interleaving Burst Formatting
Yschen, CSIE, CCU1 Chapter 9: Existing Wireless Systems: 2G, GSM System Associate Prof. Yuh-Shyan Chen Dept. of Computer Science and Information Engineering.
Wireless Communications Technology Lesson 5: GSM Bellevue Community College Bob Young, Instructor.
GSM Mobile Computing IT644.

UMTS: Universal Mobile Telecommunications System
Overview of cellular system
Ασύρματα Δίκτυα και Κινητές Επικοινωνίες
Global System for Mobile (GSM)
GSM System Survey Channel Concepts Syed Amir Abbas.
2001/12/21Prof. Huei-Wen Ferng1 Chapter 7 The 2nd Generation Cellular Systems GSM: Pan-European Digital Cellular System.
Communication Protocol Engineering Lab. Hyoung Joo. Nam. 1 GSM System Overview Wireless and Mobile Network Architecture Nam Hyoung-Joo
Presented by S.SATHISH, , M.Tech(COS).
GPRS 1. Before GPRS: HSCSD  HSCSD or High Speed Circuit Switched Data was the first upgrade to be standardized by ETSI to bring high speed data to GSM.
(Global System for Mobile Communication)
Cellular Networks 1. Overview 1G Analog Cellular 2G TDMA - GSM 2G CDMA - IS G 3G 4G and Beyond Cellular Engineering Issues 2.
GPRS General Packet Radio Service Shay Toder – Ori Matalon The Department of Communication System Engineering Ben-Gurion University June 19, 2002.
1 Lecture 19 EEE 441 Wireless And Mobile Communications.
Cellular Network Base stations transmit to and receive from mobiles at the assigned spectrum Multiple base stations use the same spectrum The service area.
GLOBAL SYSTEM FOR MOBILE COMMUNICATION
7 - 1 Chapter 7 GSM: Pan-European Digital Cellular System.
EDGE TECHNOLOGY AN EVOLUTION IN MOBILE TECHNOLOGY PRESENTED BY KIRAN KUMAR.
1 Lecture 20 EEE 441 Wireless And Mobile Communications.
1 Wireless Networks Lecture 18 GPRS: General Packet Radio Service (Part II) Dr. Ghalib A. Shah.
9 Transmission and Switching Mohamed Ashour, German University in Cairo Mohamed Ashour Lecture Fall 2011 AC = authentication center BSS = base station.
Visit for more Learning Resources
Wireless Network PMIT- By-
Third Generation (3G) Cellular Network 3G System
Global System for Mobile Communications
GSM,GPRS & CDMA Technology
Name:Shivalila A H,Shima
Subject Name: GSM Subject Code: 10EC843
GPRS GPRS stands for General Packet Radio System. GPRS provides packet radio access for mobile Global System for Mobile Communications (GSM) and time-division.
Chapter 7 The 2nd Generation Cellular Systems
Presentation transcript:

Maciej Stasiak, Mariusz Głąbowski Arkadiusz Wiśniewski, Piotr Zwierzykowski Modeling and Dimensioning of Mobile Networks: from GSM to LTE

Maciej Stasiak, Mariusz Głąbowski Arkadiusz Wiśniewski, Piotr Zwierzykowski GSM Modeling and Dimensioning of Mobile Networks: from GSM to LTE

GSM system – introduction 1/3 GSM – Global System for Mobile Communication Operates in 900 and 1800 MHz Access to the radio link is based on frequency division multiple access (FDMA) and time division multiple access (TDMA) Each band available for the system is divided into channels with bandwidth of 200 kHz For the GSM 900 system there are 124 available channels (separate for the uplink and downlink direction), and for the GSM channels

GSM system – introduction 2/3 Feature/BandwidthGSM 900GSM 1800 Uplink (MHz) Downlink (MHz) Number of available channels

GSM system – introduction 3/3

GSM system – architecture 1/6 In the GSM system three basic subsystems can be distinguished: o base station subsystem (BSS) o core network (CN) o user equipment (UE) Between particular elements of the system the interfaces are defined

GSM system – architecture 2/6 Base station subsystem – includes system of base stations and their controllers Base station provide optimum radio coverage of a given area and communicates with user equipment over air interface The operation of the base station subsystem is controlled by the base station controller (BSC) This manages radio resources allocation, controlls the setting- up of calls, gathers results of measurements carried out by base station and mobile station The BSC is also responisble for power controll and handover controll Interface A enables the BSS system to be connected to mobile switching center (MSC) Interface G b connects BSS with packet switching element

GSM system – architecture 3/6 The main elements of the core network are: o mobile switching center (MSC) o visitor’s location register (VLR) o home location register (HLR) o authentication ceter (AUC) o equipment identification register (EIR) o serving GPRS support node (SGSN) o gateway GPRS support node (GGSN)

GSM system – architecture 4/6

GSM system – architecture 5/6 MSC basic task is to control and regulate services provided by the system, circuit switching, and gathering billing information VLR registry keeps information concerning mobile stations available in the area of one, or several, MSC switching centers SGSN is the equivalent of the MSC switching center of packet switching GGSN is an interface between the mobile packet network and external packet networks

GSM system – architecture 6/6 HLR is a central database that contains details of each mobile phone subscriber authorized to use the GSM core network and includes authorization data AUC generates sets of keys used in encryption of transmission, identifies the mobile station and the network, and controls and regulates the integrity of transmitted data EIR is a data base that keeps a list of numbers identifying a given mobile station – IMEI (International Mobile Equipment Identity)

GSM system – time structure 1/3 In the GSM system each carrier frequency is divided into eight time slots Packet transmission is commenced every ms and single bit lasts 3.69 µs Typical packet, except access packet, has 148 bits, thus its duration is about 546 µs The duration of a single time slot is 577 µs, wich allows for maintaining a steady interval between successively transmitted packets

GSM system – time structure 2/3

GSM system – time structure 3/3

GSM system – logical channels 1/4 Logical channels can be divided into two categories: o control channels – are used to set up a connection in the radio network for transmission of control data o traffic channels – are used to transmit user data In the GSM system, speech signals are transmitted with traffic channels (TCHs). Speech can be transmitted at full rate, 13 kbps, or at half rate, 6.5 kbps

GSM system – logical channels 2/4

GSM system – logical channels 3/4 Frequency correction channel (FCCH) – used by the mobile station to tune to the carrier frequency, a frequency correction burst is transmitted on the channel by generating unmodulated sine waves Synchronization channel (SCH) – transmits base station identity code (BSIC), which allows the mobile station to identify the base station and to convey synchronization information Broadcast control channel (BCCH) – used for transmission of control information such as: radio channel frequency used by a given cell, neighbor cell list, information on the paging channel, configuration of logical channels in the base station Paging channel (PCH) – with the PCH the base station initiates a connection with the mobile station

GSM system – logical channels 4/4 Random access channel (RACH) – used by mobile station for initial access to a system (with the RACH the mobile station initiates a connection with base station) Access grant channel (AGCH) – used by the base station to assign resources to a mobile station requesting access to the network Stand alone dedicated control channel (SDCCH) – used to provide a reliable connection for signaling and SMS messages, for authentication, and to provide information on location update Slow associated control channel (SACCH) – supports the SDCCH channel, used for sending network measurement reports and information related to power control procedures Fast associated control channel (FACCH) – coupled with the speech channel, used for immediate transmission of information related to, for example, cell handover

High Speed Circuit Switched Data 1/4 High Speed Circuit Switched Data is an additional feature of the GSM network and was introduced in phase 2 HSCSD technology enables a simultaneous application of several speech channels for a single data transmission link A connection can be set up that makes use simultaneously of n channels (time slots) in the radio interface, where n takes on the values n = 1; 2;...; 8 A HSCSD connection can be set up only when the mobile station is capable of using several radio channels simultaneously Additional modifications are needed in the BSS system that involve multiplexing of a component data stream in one 64 kbps channel of A interface

High Speed Circuit Switched Data 2/4 A HSCSD connection can have a symmetrical configuration – the same number of speech channels is allocated for the uplink and the downlink direction – or a non-symmetrical configuration A non-symmetrical configuration is chosen when the subscriber requirements cannot be accomplished in a symmetrical configuration The maximum link transmission speed that can be achieved by the HSCSD technology depends on the number of channels used in the radio interface and on the applied coding Due to a necessity of transmitting all channels included in a HSCSD connection in one link 64 kbps in interface A, the transmission speed is limited to 57.6 kbps

High Speed Circuit Switched Data 3/4 Data rate performance in radio interface [kbps] TCH/F4.8TCH/F9.6TCH/F kbps1N/A 9.6 kbps21N/A 14.4 kbps3N/A kbps42N/A 28.8 kbpsN/A kbpsN/A kbpsN/A kbpsN/A 4

High Speed Circuit Switched Data 4/4

GPRS Packet Transmission 1/6 The implementation of packet transmission in the GSM system requires changes in the structure of the system New elements are included in the network – SGSN and GGSN nodes According to the assumptions given in 3GPP specification, GPRS should allow: o pulse data transmission in which time interval between individual moments of transmission is considerably higher than the average transmission delay o frequent transmission (several times per minute) of small amount of data (bursty data transfer up to 500 octets) o occasional transmission of large volumes of data

GPRS Packet Transmission 2/6 The GPRS technology makes it possible to transmit data in several channels. Within one packet connection, the mobile station as well as the base station can make simultaneous use of 8 time slots in a frame All users of a packet service can share resources available for data transmission that are allocated, due to the asymmetry of traffic, separately for the uplink and for the downlink direction The radio interface resources can be dynamically shared by speech service and packet data transmission depending on the configuration of the network

GPRS Packet Transmission 3/6 Following logical channels, responsible for transmission of data and signalling information are introduced: o Packet Common Control Channel (PCCCH) Packet Random Access Channel (PRACH) – used by the mobile station to initiate uplink transfer of user data or signalling information Packet Paging Channel (PPCH) – used to page a mobile station preceding downlink direction packet transfer. The channel can also be used for establishing speech connections Packet Access Grant Channel (PAGCH) – used in the packet transfer establishment phase to send resource assignment to a mobile station preceding packet transfer Packet Notification Channel (PNCH) – used to send point to multipoint multicast notification information to a group of mobile stations preceding multicast packet transfer

GPRS Packet Transmission 4/6 Following logical channels, responsible for transmission of data and signalling information are introduced: o Packet Broadcast Control Channel (PBCCH) – used to broadcast packet system information o Packet Data Traffic Channel (PDTCH) – allocated for user data transfer. Several PDTCH channels can be allocated to a given mobile station. They can be allocated temporarily to one or more mobile stations o Packet Associated Control Channel (PACCH) – used to transmit signalling information related to a given mobile station, such as those related to power control or packet reception acknowledgement messages o Packet Timing Advance Control Channel, Uplink (PTCCH/U) – used to ensure that the correct timing advance is maintained for each mobile station. In the uplink direction, the channel is used by a mobile station to send an access burst o Packet Timing Advance Control Channel, Downlink (PTCCH/D) – used to send packets in the downlink direction to assess the needed timing advance in order to achieve frame synchronization

GPRS Packet Transmission 5/6 Four coding schemes (CS) have been defined for the GPRS transmission: CS-1, CS-2, CS-3 and CS-4 Particular schemes are characterized by different user data transmission speed and by a various degree of error protection procedures CS-1 coding, due to its highest level of protection (error correction), is used for channels with highest interference and for signalling channels CS-4 coding enables the fastest data transmission speed – 21,4 kbps for one channel, but has no protection

GPRS Packet Transmission 6/6 Coding schemeCoding efficiencyData rate [kbps] CS-11/29.05 CS-22/313.4 CS-33/415.6 CS

EDGE Packet Trasnmission 1/2 Voice transmission in the GSM system and the GPRS packet transmission uses the Gaussian minimum shift keying (GMSK) modulation. This is a binary modulation with speed of kbps EDGE technology achives higher speed value with the same bandwidth of the radio channel thanks multivalue, eight- level phase shift keying modulation (8PSK) EDGE uses nine coding schemes: MCS-1 – MCS-9 Each coding scheme is characterized by a different data transmission speed and data protection Transmission speed for one PDTCH channel with MCS-1 coding is 8.8 kbps, for MCS-9 coding scheme is 59.2 kbps

EDGE Packet Trasnmission 2/2 Coding schemeCoding efficiencyModulationData rate [kbps] MCS-91.08PSK59.2 MCS PSK54.4 MCS PSK44.8 MCS PSK MCS PSK22.4 MCS-41.0GMSK17.6 MCS-30.85GMSK MCS-20.66GMSK11.2 MCS-10.53GMSK8.8