Pdf on cdma architecture

Take this free onlinetest or quiz or trivia on 3g umts cdma2000 cdma network architecture and interfaces. Gsm network is consists of mobile station, base station subsystembts. One of the unique aspect of cdma is that while there are certainly limits to the number of phone calls that can be handled by a carrier. It is an integration of various technologies including gsm, cdma,gprs,imt2000,wireless lan. Lets take a simple analogy to understand the concept of cdma. The mobile phone and subscriber identity module, the umts radio access network and, supporting voice with the circuit switched core network. Pdf the standardization phase for wideband cdma systems like umts is running towards its finalization. It was the combination of these two network elements that provided the basis for the 3g umts network architecture.

A design of the codedivision multiple access cdma cellular system architecture is presented. 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. References roger l freeman, fundamentals of telecommunications, 2nd edition, wiley 2005. A 3g mobile network offers good download and upload speeds. To permit this without undue interference between the users, cdma. We will also describe the architecture of telecommunication networks. 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. Pdf version quick guide resources job search discussion code division multiple access cdma is a channel access method normally used by 3g radio communication technology as well as in some other technologies. Gsm and cdma are competing wireless technologies with gsm enjoying about an 82% market share globally. Page 2 pdsn, packet core connectivity for cdma networks starent networks, corp. In this section we describe the core packet data architecture associated with the cdma radio interface. The subscriber carries the mobile station, which is part or rss.

Cdma, code division multiple access an implementation of direct sequence spread spectrum, dsss, and was used almost universally for 3g mobile communications standards as it provided an excellent format as a multiple access scheme. Cdma is radically a new concept in wireless communications wherein both data and voice. Is95 uses a 2421 chip period, derived from a 42 bit mask. Nov 15, 2019 cdma is a form of multiple access system based upon direct sequence spread spectrum technology. Study these interview mcq questions and answers on 3g umts cdma2000 cdma network architecture and interfaces. Cdma20001x radio access network ran packet control function pcf. Gsm and cdma spectrum frequencies 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.

The architecture of the cdma mobile sys tem cms is developed based on three func tion groups service resource, service control, and service management. Mar 09, 2014 contents o cellular communication multiple access method cdma introduction o cdma network architecture o call processing in cdma network 3. Ues are devices like mobile phones handsets, wll phones, computers with wireless internet connectivity. Umts works on wcdma, cdma2000 and tdscdma implementations by 3gpp and 3gpp2. Downlink cdma channel structure reproduced with written permission from tia. Architecture, security and future challenges ihtesham ul haq 1, zia ur rah man 2, shahid ali 3, engr.

Base station system bss aaa rp pi pi pdsnfa ha aaa st40 st40 ipbased network internet or public data network pdn aaa. It allows many users to coexist, with minimal mutual interference. W cdma the radio technology of umts is a part of the itu imt2000 family of 3g standards. The is95 system can be thought of as having many layers of protection against interference. Cdma network architecture consists of following elements mobile station ms. The network can be that of any of the wireless communication technologies like gsm, cdma, wireless local loop, wifi, wimax or other wide area. The umts network architecture can be divided into three main elements. 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. Sep 22, 2019 cdmaone covers larger areas and consumes less power than the other figure describes the cdmaone architecture, with its corresponding interfaces.

When the fcc issued 1900 mhz to pcs in the united states it was based on gsm. Gprs network in 3g is similar to that of the 2g gsm network. Cdma2000 is another branch of 3g network under umts specifications. A digital multiple access technique specified by the telecommunications industry association tia as is95.

You can easily clear job interviews and college exams after taking this 3g quiz. Enhanced services can be provided to cdma one subscribers through cdma2000. 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 the nature of its in structure general packet radio service gprs and enhanced data rates for global evolution edge cdma, are 3g gsm. Cdma is the base on which access methods such as cdmaone, cdma2000, and wcdma are built. The bts transmits and receives radio signals, realizing communication between the radio system and the mobile station. A cdma network architecture using optimized sectoring article pdf available in ieee transactions on vehicular technology 5. Incremental progress 1g amps data capabilities 30 khz. This protocol uses cdma access to send voice and data and signals between mobile phones and cell sites. The mobile phone and subscriber identity module, the umts radio access network and, supporting voice with. Code division multiple access cdma linkedin slideshare. Nowadays 14% of the worldwide market is choosing cdma because it leaves more space at the time of data transferring.

Cdma 2000 1x architecture and feature free download as powerpoint presentation. Cdma architecture soft handoff cdma systems requires a gps receiver and antenna at every cell base. Cdma architecture cell breathing cdma is a noisegenerated technology. The cdma mobile system architecture wiley online library.

Tarmo anttalainen, introduction to telecommunications, network engineering, 2nd edition, artech house, 2003. A base transceiver station bts is a piece of equipment that facilitates wireless communication between user equipment ue and a network. Technically gsm global system for mobile communications, originally from groupe special mobile. Wcdma the radio technology of umts is a part of the itu imt2000 family of 3g standards. Muhammad faisal 4 department of computer science, b acha khan university. Umts works on wcdma, cdma2000 and tdscdma implementations by 3gpp. Cdma 2000 1x architecture and feature computer network. Cdma tutorial pdf version quick guide resources job search discussion code division multiple access cdma is a channel access method normally used by 3g radio communication technology as well as in some other technologies. Cdma2000 is as much an air interface as a solution of network to provide the services that the clients demand today. Cdma architecture based on orthogonal complementary codes, chara cterized by its unique spreading modulation scheme, uplink and downlink signatur e design, and receiver implementation for multipath signal detection. The user equipment or ue is the name given to what was previous termed the mobile, or cellphone. Architecture du cdma, principe des codes walsh et pn pseudo noise, architecture cdma, avantages et limites du cdma, multiplexage cdma, comparaison cdma vs tdma.

Cdma system use the same carrier frequency and may. Architecture of the gsm network by dinesh thakur category. Code division multiple access 2000 cdma2000 is a third generation 3g standard developed by the international telecommunication union itu. Pdf architectural design of a code division multiple. Code division multiple access for wireless communications. Cdma cellular systems are deemed superior to fdma and tdma, which is why cdma plays a critical role in building efficient, robust, and secure radio communication systems. Cdma2000 is asolution for operators of new radio networks that wish to take advantage from the dynamic ones of the market created by mobility and the internet. Pn codes in the form of walsh codes are assigned for communication. The proposed cdma system should preferably have an inherent abil ity to. To respond to the call for cdma innovation, a new physical layer architecture, namely orthogonal complementary coded cdma with offset stacking occ cdma. An efficient, highperformance dsp architecture for wcdma. Pdf rf transceiver architectures for wcdma systems like umts. A bipolar cdma code is used to provide a good system performance and to reduce mai.

Highlevel wcdma ue receiver block architecture figure 1 shows a toplevel diagram of a wcdma ue receiver. Gsm stands for global system for mobile evolution, developed based on 3gpp standards. Starents pdsnfa and ha seamlessly deliver enhanced voice, data, and multimedia services for cdma networks. The additional of packet data with gprs required additional network entities to be added.

Umts uses wideband cdma wcdma as the radio transmission standard. Umts network is called a third generation network3g. The new name was chosen because the considerably greater functionality that the ue could have. Using this bandwidth it has the capacity to carry over 100 simultaneous voice calls, or it is able to carry data at speeds up to 2 mbps in its original format. On the performance of tcp over a tdd tdcdma architecture conference paper in international journal of communication systems 167. The new cdma architecture ought to be technically feasible with current available digital technology. Pdf architectural design of a code division multiple access. This allows several users to share a band of frequencies see bandwidth. Cdmaone covers larger areas and consumes less power than the other figure describes the cdmaone architecture, with its corresponding interfaces. Pdf a cdma network architecture using optimized sectoring. Cdma technology was originally designed by qualcomm in the u. Two structures of a detector are employed, which are the pin and. Umts network is called a third generation network 3g. Codedivision multiple access cdma is a channel access method used by various radio communication technologies.

The mobile switches of a gsm network may also be replaced by an ngn architecture which is called r4 architecture. Design and implementation of mccdma systems for future. Cdmaarchitecture radio resource management networks. Telecommunications network and service architectures. Is interim standard 95 cdmaone network architecture.

Wcdma including the ran radio access network and the cn core network. The ms is the mobile subscriber equipment, which can originate and receive calls and communicate with the bts. Pdf new generation of optical noc system with wireless cdma. Study these interview mcq questions and answers on 3g umts wcdma network architecture and interfaces. The gps antennas synchronize all the cells to one timing source, which is the gps. This handoff is also known as mobile directed handoff. Cdma pseudonoise sequences are very long, thereby giving excellent crosscorrelation characteristics. Cdma is the present and future of advanced wireless services code division multiple access cdma is a spread spectrum technology used in second and third generation wireless networks cdmaone identifies 2g and 2. It is assigned to a single user and contains all the functions needed to access umts services. Dcs 1900 is considered the gsm standard for north america and is called north american gsm. Umts to gsm or umts to gprs umts supports a variety of user data rates and both packet and circuit switched services system composed of three main subsystems telcom 2720 4 umts system architecture ue user equipment that interfaces with the user utran umts terrestrial radio access network handles all radio. Jul 18, 2017 in this video we discuss three topics. Abstract in this paper, a new generation of network on chip noc system with cdma code is proposed.

Pdf mobile positioning in cdma cellular networks researchgate. The radio access network changed considerably as a completely new radio interface was used based around the use of cdma. On the performance of tcp over a tddtdcdma architecture. Code division multiple access or cdma has its roots in wwii era spread spectrum technology. Basics idea about cdma technology and its applications. A mobile station in a form of a handset, pda, or pcmcia card in handheldportable computer supporting simple ip or mobile ip client or both. As such the system must monitor its noise floor or ambient noise. 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. What is code division multiple access 2000 cdma2000. This is absolutely necessary for the soft handoff process. Network architecture based on the dualstack solution. Pdf new generation of optical noc system with wireless. Gsm uses digital communication system or dcs 1800 and is the worlds main 2g standard. The analogtodigital converter adc in the receivers radio frequency block samples baseband signals from the antennas at a rate of nosf x fc, where fc is the transmission chip rate and nosf is an oversampling factor.

Mar 30, 2020 cdmaone covers larger areas and consumes less power than the other figure describes the cdmaone architecture, with its corresponding interfaces. Easily clear job interviews and college exams after studying. Jidoka concept pdf active slow power control is also used on the forward traffic channels, where during a call, the mobile sends cdmaoone messages to the network indicating the quality of the signal. The new mc cdma architecture that has a great potential for future mobile communications tackles this issues comprehensively. The 3x standard has now been superseded by a twophase strategy called cdma2000 1xev. Kassas department of electrical and computer engineering university of california, riverside joe. Abstract in this paper, a new generation of networkonchip noc system with cdma code is proposed. Pdf version quick guide resources job search discussion code division multiple access cdma is a channel access method normally used by 3g radio communication technology as. The generic gsm network architecture is composed of three subsystems as the radio subsystem rss, the network and switching subsystem nss and the operation subsystem oss.

Cdma systems are equipment with a protocol that allows the system to adjust in these situations. A programmable architecture for ofdm cdma article pdf available in ieee communications magazine 3711. The umts architecture takes advantage of the existing gsm and gprs networks which serve as a core network in umts infrastructure. To respond to the call for cdma innovation, a new physical layer architecture, namely orthogonal complementary coded cdma with offset stacking occcdma. Tdma time division multiple access and cdma code division multiple access. Mccdma, multidspfpga architecture, codesign methodology, hardwaresoftware distribution.

The architecture of cdma2000 data system is based on the following components as shown in figure 4. Pdf challenges and futuristic perspective of cdma technologies. Highlevel w cdma ue receiver block architecture figure 1 shows a toplevel diagram of a w cdma ue receiver. To much noise will cause interference leading to degraded service or dropped calls. This is done in gsm via gaussian minimum shift keying gmsk. Logically, the cn is divided into the cs circuit switched domain and the ps packet switched. Technologies tdmafdma cdma gsm european standard is 6 u.

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