Base level umts networks are generally capable of downlink speeds as 384 kbps. This gsm tutorial covers gsm basics, gsm architecture and gsm system features. Codedivision multiple access cdma is a channel access method used by various radio. Cdma 2000 1x architecture and feature computer network. Often described as a true intelligence network, gsm is called the first true wireless network because. Gsm and cdma are competing wireless technologies with gsm enjoying about an 82% market share globally. All ip in 3g cdma networks covers all the key aspects of umts and its implementation from both the engineering designer and the operator and service providers point of view. Youve probably heard of these acronyms when you were told that you cant use a certain phone on your mobile network because theyre using different technologies that are not compatible. Includes new chapters on lte, wimax, and backhaul major revamp to the core network chapter new and expanded material on network design considerations, highspeed packet access, mimo, hsdpahsupa, femtocells, cloud devices, locationbased services, and more updated standards for implementing wireless local area network computer communication. A gsm is more flexible than cdma as the sim can be replaced with other gsm devices.
Pdf code division multiple access cdma system in multipath. The architecture of the cdma mobile sys tem cms is. Umts makes use of wcdma, a technology that shares much with cdma networks used throughout the world, though it is not compatible with them. Abstract as the networks improves, demands for rapid data. Comparison 1g 2g 3g 4g 5g period 1980 1990 1990 2000 2000 2010 2010 2020 2020 2030 bandwidth 150900mhz 900mhz 100mhz 100mhz x bw pr.
It addresses the essential tasks involved in the umts network deployment in new regions and within existing 2g2. Technical introduction to cdma 1 course rf100 chapter 7 technical introduction to cdma 2 course outline. The gsm architecture consists of multiple network elements. Umts network is called a third generation network3g. Wcdma including the ran radio access network and the cn core network. By standard the gsm network is divided into four 4 subsystems 1. In 1985, the fcc allocated three frequency bands to spread spectrum communications. Both frequency division duplex fdd and time division duplex tdd variants are supported. Cdma i about the tutorial code division multiple access cdma is a channel access method normally used by 3g radio communication technology as well as in some other technologies. In 2000, gsm become very popular technology worldwide. Cdma is almost exclusively used in the united states and some parts of canada and japan.
Careful network planning is thus a primary aspect of implementing gsmcdma networks network planning is an ongoing process requiring inputs from a lot of competence areas, such as transmission, access systems, data communications. Gsm is the short form of global system for mobile communications. Code division multiple access or cdma has its roots in wwii era spread spectrum technology. Gprs network in 3g is similar to that of the 2g gsm network. An important function of oss is to provide a network overview and support the.
The purpose of oss is to offer the customer costeffective support for centralized, regional, and local operational and maintenance activities that are required for a gsm network. Logically, the cn is divided into the cs circuit switched domain and the ps packet switched. Study these interview mcq questions and answers on 3g umts cdma2000 cdma network architecture and interfaces. A dynamic cdma network for multicore systems sciencedirect. Sip signaling is performed to authenticate and establish a connection to the subscriber access network. Wcdma the radio technology of umts is a part of the itu imt2000 family of 3g standards. Interim standard 95 is95 was the first ever cdmabased digital cellular technology.
Code division multiple access technology guided by. Cdma systems are equipment with a protocol that allows the system to adjust in these situations. The umts terrestrial radio access network utran consists in bs node the 3g term for bts and radio network controllers rncs connected by atm network. Umts network is called a third generation network 3g. Multiple users occupying the same band by having different codes is known as cdma code division multiple access system let w spread bandwidth in hz r 1tb date rate s received power of the desired signal in w j received power for undesired signals like multiple access users, multipath. Both the technologies can be used with 3g standard phones, but 3g gsm speeds can be faster than 3g cdma speeds.
Umts is evolved from gprs to replace the radio access network. The ms is the mobile subscriber equipment, which can originate and receive calls and communicate with the bts. The network has three main components network interface ni, cdma transmitter and an arbiter block. Rates for global evolution edge cdma, are 3g gsm based standards. The proposed d protocol is employed to design a 14node dynamic cdma network architecture, where in 8bit walsh code is used. Contents o cellular communication multiple access method cdma introduction o cdma network architecture o call processing in cdma network.
As such the system must monitor its noise floor or ambient noise. Contents o cellular communication multiple access method cdma introduction o cdma network architecture o call. The global system for mobile communications gsm which is a standard for 2g second generation cellular networks has created an avenue for. As shown in figure 3, these areas include cells, location areas las, mscvlr service areas, and public land mobile network plmn areas. Codedivision multiple access cdma is a channel access method used by various radio communication technologies. Gsm standard still evolving and improved with new features and services. An ms has a number of identities including the international mobile. Basic cdma network architecture access manager or cbsc switch bts gps gps gpsr cm slm gpsr tfu cdsu disco cdsu tfu1 cdsu. Gsm is in use over 80% of the worlds mobile networks in over 210 countries as compared to cdma. Cdma 2000 1x architecture and feature free download as powerpoint presentation. In these computer networks notes pdf, we will study the concepts of data communication and computer networks which comprises of the study of the standard models for the layered protocol architecture to communicate between autonomous computers in a.
The technicality of cdma technology has given significant advantages over other parallel technologies in terms of spectrum efficiency and overall. Download fulltext pdf a cdma network architecture using optimized sectoring article pdf available in ieee transactions on vehicular technology 5. The gsm base station subsystem bss and the wcdma radio access network ran are both connected to the gsm core network for providing a radio connection to the handset. The proprietary name for is95 is cdmaone it is a 2g mobile telecommunications standard that uses cdma, a multiple access scheme for digital radio, to send. A design of the codedivision multiple access cdma cellular system architecture is presented. Cdma network architecture consists of following elements mobile station ms. A system and methodology for implementing an allinternet protocol for voice and data communications on a code division multiple access cdma network. Pdf a cdma network architecture using optimized sectoring. Cdmabased networkonchip architecture daewook kim, manho kim and gerald e. The umts architecture takes advantage of the existing gsm and gprs networks which serve as a core network in umts infrastructure. The base station architecture is based on a universal platform that can support cdma and other cellular standards such as amps and tdma in the same base.
The cdma network operates in the frequency spectrum of cdma 850 mhz and 1900 mhz while the gsm network operates in the frequency spectrum of gsm 850 mhz and 1900 mhz. Network architecture based on the dualstack solution. Global system for mobile communication technology mobile device investigations program technical operations division. Comprehensive and up to date information about the is2000 1x releases a through d, including 1xevdv, as well as 1xevdo or is856 revisions 0 and a standards. Pdf many digital cellular and mobile systems are in use today. The technicality of cdma technology has given significant advantages over other parallel technologies in terms of spectrum efficiency and overall performance. To much noise will cause interference leading to degraded service or dropped calls.
It has an open, distributed architecture the separation of switching and service control functions full use of ss7 as the signaling infrastructure its clearly defined and specified interfaces. Pdf architectural design of a code division multiple. Cdma is actually a newer technology than gsm and it offers some of the newest calling and data options evdo rev. It was developed by qualcomm and later adopted as a standard by the telecommunications industry association in tiaeiais95 release published in 1995.
Gsm network areas the gsm network is made up of geographic areas. To permit this without undue interference between the users, cdma. Flexibility gsm is more flexible than cdma as wide range of phones can be used with this service. Umts works on wcdma, cdma2000 and tdscdma implementations by 3gpp. This type of sim card mobility is analogous to terminal mobility, but provides a personalmobilitylike service within the gsm mobile network refer to chapter 11 for more details. A sim card is required for the working of gsm device. Topics in our studying in our computer networks notes pdf. A 3g mobile network offers good download and upload speeds. In other words, asynchronous cdma is ideally suited to a mobile network where large. In these computer networks notes pdf, we will study the concepts of data communication and computer networks which comprises of the study of the standard models for the layered protocol architecture to communicate between autonomous. The architecture of cdma2000 data system is based on the following components as shown in figure 4. Cdma architecture cell breathing cdma is a noisegenerated technology. A presentation of cdma2000 technology from the fundamental concepts, architectures and protocols to the network engineering and planning principles. In this paper, we advance overloaded cdma interconnect oci to enhance the capacity of cdma network onchip noc crossbars by increasing the number of usable spreading codes.
The ran is used to process all the radiorelated functions, while the cn is used to process all voice calls and data connections within the umts system, and implements the function of external network switching and routing. Cdma is known to be an outdated technology largely due to networks global reach issue but it is not so. Presents solutions for the integration and coexistence of 2g and 3g systems and. This allows several users to share a band of frequencies see bandwidth. Study these interview mcq questions and answers on 3g umts wcdma network architecture and interfaces. The cdma mobile system architecture wiley online library. Cdma, which stands for code division multiple access, is a competing cell phone service technology to gsm, the worlds most widely used cell phone standard. A method and apparatus are provided for connecting a mobile device to a subscriber access network, such as 3g network over an untrusted network, such as a wireless local area network wlan. The methodology is preferably also employed when migrating from a legacy, circuitedswitched system to the improved packetswitched, allip. Cdma established the foundation for 3g technologies is95 cdmaone initial cdma standard from qualcomm may 1995 mobile 3g evolved into two competing standards both based on cdma cdma2000 uses 1. Cdma is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel. This basic tutorial on gsm architecture also covers gsm burst types, gsm frame structure, gsm channels, gsm physical layer and so on. Rium based cdma phones using optical fiber network. Cdma20001x radio access network ran packet control function pcf.
Gsmcdma networks planning and design of gsmcdma networks a good geographical coverage is the basis. Evolutionary analysis of gsm, umts and lte mobile network. An access control server is employed to handle packetized communications within the cdma network. Codedivision multiple access cdma has been proposed to implement onchip crossbars due to its. Cdma can be implemented in several ways, two of which are frequency hopping and direct sequencing.
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