It is mainly a channel access method that is used for shared medium networks as well as a digital transmission technology that allows its users to access a single radiofrequency channels without any interference. It discusses and analyzes the application of 3g technology, such as video calls, wireless internet access and remote monitoring. Tdma frame structure showing a data stream divided into frames and those. Pdf since 1994, europe and north america have taken divergent approaches to.
Two slots make one subframe, which is 1ms long 30,720 t s. The following figure shows a typical tdscdma frame structure for a traffic timeslot including the symbol numbering convention. Comparing with tdmafdma technologies, such as gsm, the coverage of a wcdma network cannot be. This paper describes a wideband code division multiple access test system developed by nokia. Baseband processing in 3g umts radio base stations diva. Within 3gpp, wcdma is called utra universal terrestrial radio access, fdd frequency division duplex and tdd time division duplex, the name wcdma being used to cover both fdd and tdd operation. It covers both 51 frame multiframe and 26 frame multiframe structure of gsm. This article from the 3g technology development at home and abroad studies the basic features of 3g technology, including international standards and the leading technology of china unicom. What is the difference between cdma and wcdma networksim. Pdf wcdma system standardization, interfaces and power control. Comprehesive coverage of umts 3g news, licensing, business developments, 3g wcdma telecommunication technology, multi media mobile phones and future communications. Wcdma technology provides some advantages for the operator in that it allows the data, but also improves the voice of base.
Wcdma vs gsm wcdma wideband code division multiplexing access and gsm are two technologies that are used in mobile telecommunications. Cdma is a 2g technology and is a direct competitor to gsm, which is the most widely deployed technology. The wcdma infrastructure is compatible with gsm mobile radio communication system. Wcdma open loop power control in wcdma attempt to make a rough estimation of path loss by measuring downlink beacon signal problem far too inaccurate fast fading is essentially uncorrelated between uplink and downlink due to large frequency separation of uplink and downlink band of wcdma fdd mode. A high speed 3g mobile wireless technology with capacity to offer higher data rate than cdma. When i am first trying to study gsm, i got so confused about the overal frame structure. The lte halfframes are further split into five subframes, each 1ms long. Wcdma for umts radio access for third generation mobile communications. Ordinary umts is implemented with wcdma wideband code. Analysis of ltetdd inchannel interference lication note mobile operators are embracing lte technology and are aggressively deploying it using two techniques. Dchsdpa enables the user equipment ue to receive downlink data on two. Wcdma is wideband cdma that still uses code division to divide the channels. Difference between cdma and wcdma difference between.
Comprehensive coverage of umts 3g news, licensing, business developments, 3g wcdma telecommunication technology, multi media mobile phones and future communications. The figure below shows the lte frame structure under time division mode tdd type 2 and frequency division. Frequency and time chip, bit, slot, frame synchronisation. This page on gsm tutorial covers gsm frame structure including concept of slot, frame,multiframe,superframe and hyperframe. The minimum unit being frame or tdma frame is made of 8 time slots. Toe reference toe name huawei wcdma nodeb software toe version v200r0c01spc010 toe developer huawei toe release date 20110812 2 in addition to the toe name indicated at the table above, the following. Engineering services group wcdma network planning and optimization 80w08531 revision b may, 2006. Umtstdd is a mobile standard built upon the umts 3g standard, using a. Download as ppt, pdf, txt or read online from scribd. Title huawei wcdma nodeb software security target version 1. Ltea frame structure radio technology software defined radio. The 10 ms frame comprises two half frames, each 5 ms long.
Averaging the power delay profile reduces the spurious floor. Ordinary umts is implemented with wcdma wideband code division multiple access technology and frequency division duplexing fdd the term wcdma also refers to one of the itus imt2000 standards, a type of 3g cellular network. One of the main reason for this confusion is that even a single cycle of a whole structure requires so many slots and frames, it is really hard to visualize the whole frame structure on a limited space of a sheet of paper or on a. Indicator channel pich frame format physical downlink shared channel. The majority of these will be served by wcdmahspa and lte. What is wideband code division multiple access wcdma. Teachers should create their own frames based on specific passages that their students will read.
Wideband code division multiple access, along with umtsfdd, utrafdd, or imt2000 cdma direct spread is an air interface standard found in 3g mobile telecommunications networks. Cn core network is responsible for transport functions such as switching and routing calls and data, tracking users usim me. Wcdma and ltewcdma and lte synchronization aspectssynchronization aspects the 6th international telecom sync forum, itsf munich, november 2008. It discusses and analyzes the application of 3g technology, such as. Text structure frames aka summary frames, paragraph frames, writing frames frames should not be used as worksheets for students to fillin. Wcdma support asynchronous operation in which transmission from. There are two l2 frame format types for the dchs data frames and control frames. Wcdma is a 3g technology that is often used in tandem with. Difference between wcdma and gsm difference between. It assumes a spreading factor of 1 and data fields containing 352 symbols each. Lte frame structure and resource block architecture reference signal structure division mode enodeb ul channel and dl channel time domain signal structure physical resource division mode and frequency for lte resource block architecture. Ordinary umts is implemented with wcdma wideband code division multiple access technology and frequency division duplexing. Third edition edited by harri holma and antti toskala both of nokia, finland. Umts wcdma basic concept 3g 1 duplex telecommunications.
Oct 21, 2012 wideband code division multiple access wcdma is a thirdgeneration 3g standard that employs the directsequence code division multiple access dscdma channel access method and the frequencydivision duplexing fdd method to provide highspeed and highcapacity service. Again cdma is 2g telecommunication standard and provide very less data rates compared to wcdma which is third g. The basic difference between the cdma and wcdma is bandwidth,cdma uses 1. Wcdma channel structure and functions telecommunications. February, 28th 2005 overview in this document i make a study of third mobiles generation systems. Ltea frame structure free download as powerpoint presentation.
Corresponding to 38400 chips, it is a basic unit of the physical layer. For example, sccpch is transmitted at the multiples of 256 chips delay from the start of cpichstart of frame timing. Wcdma has the capacity to easily handle bandwidthintensive applications such as video, data, and image transmission necessary for mobile internet services. A tdma frame is defined on the radio carrier 8 users per carrier channel rate is 270. Asynchronous operation leads to the use of different. Wideband code division multiple access wcdma is a thirdgeneration 3g standard that employs the directsequence code division multiple access dscdma channel access method and the frequencydivision duplexing fdd method to provide highspeed and highcapacity service. In the following example a wcdma max power test and a wcdma min power test should be executed consecutively. The frame structure for the type 2 frames used on lte tdd is somewhat different.
In wcdma, the coverage and capacity requirement cannot be considered independently, but should be planned at the same time with proper guidelines. Hsdpcch uplink physical channel structure with dbdchsdpa one radio frame 10ms 3dtower. What is umts network architecture radio access radio interface frequency bands umts cdma modulation data channels umts tdd tdsdcdma handover. Wcdma channel structure and functions free download as powerpoint presentation. The difference between these two is that gsm is a 2g technology and wcdma is a part of the newer 3g group of technologies. The operators also offer mobile connectivity to the internet and corporate intranet with maximum bit rate of 384 kbps downlink and both uplink. In fdd mode, this is done using frame structure type 1. Superframe one superframe lasts 720ms, and consists of 72 radio frames.
Developed and maintained by the 3gpp 3rd generation partnership project, umts is a component of the international telecommunications union imt2000 standard set and compares with the cdma2000 standard set. Gsm won the world, being more flexible and cheap open standard 3g added internet. Frame structure for downlink dedicated physical channel dpch network systems technologies, llc 14. This technology is controlled by the united states government. The network is free to also transmit other common physical channels such as the broadcast pccpch, sccpch and synchronization sch channel on the secondary carrier depending on the deployment scenario and whether. Global system for mobile gsm david tipper associate professor graduate program of telecommunications and networking university of pittsburgh telcom 2720 slides 8 based largely on material from jochen schiller, mobile communications 2nd edition telcom 2720 2 second generation cellular systems motivation for 2g digital cellular. Total of 6 slot structure for uplink dpcch 0,1,2 bits for fbi and with or without tfci dpdch sf. Voice capacity offered is very high due to interference control mechanisms, including frequency reuse of 1. Assume that the remains constant during travel, o 4. The umts world is an 3g mobile system news and information provider. The most major difference between cdma and wcdma is in the group of technology that it is grouped with. The universal mobile telecommunications system umts is a third generation mobile cellular system for networks based on the gsm standard.
Pdf wcdma system standardization, interfaces and power. Tdma is the widespread type of service that is used in north. Celladvisor analysis of ltetdd inchannel interference. Wcdma frame structure threshold level during 10 8 interval. Umts system architecture ue user equipment that interfaces with the user utran umts terrestrial radio access network handles all radio related functionality wcdma is radio interface standard here. Overview of umtswcdma technology 8 wcdma specifications channel bandwidth 5 mhz duplex mode fdd and tdd downlink rf channel structure direct spread ds chip rate 3. Channelization or spreading code to reach channel rate of 3. For ease of bs deployment in both indoor and outdoor environments, wcdma supports intercell asynchronous operation.
They should be used to support students thinking as they retell, summarize, andor write. Lte frame structure and resource block architecture. Each radio frame is of duration 10ms and composed of 15 slots. Multilevel simulation of wcdma systems for thirdgeneration.
The physical layer has interface to both mac and rrc sublayer. Single transport format a low and fixed data rate for the. Wcdma and lte synchronization aspects chronos technology. Wcdma enables simultaneous voice and data which allows, for example, browsing or email when voice conferencing or video sharing in real time during voice calls. Path searcher path searcher for a wcdma rake receiver, rev. Asynchronous bs operation 2nd generation narrowband cdma systems require tight interbasestation synchronization. Wcdma is a third generation mobile communication system that uses cdma technology over a wide frequency band to provide highspeed multimedia and efficient voice services. The gsm frame structure is designated as hyperframe, superframe, multiframe and frame. Cell search procecess in wcdma would be described as follows for the detailed understanding, i would recommend you to study each of the physical channels involved in the following description. Wcdma for umts radio access for third generation mobile communication edited by harri holma and antti toskala.
At first i will center the study in the objectives and main characteristic of this generation. Multilevel simulation of wcdma systems for thirdgeneration wireless applications dr. Important at international boundary, where same frequencies can be shared by different operators 3 bits color code to avoid listening a signal from another cell, thinking it. As wcdma mobile penetration increases, it allows wcdma networks to carry a greater share of voice and data traffic. Lowest layer in this interface is physical layer, phy. An ads bench for generating multicarrier 3gpp wcdma. As a result the mobile would loose the synchronization. Layer 2 consists of medium access control mac radio link control rlc the broadcast multicast control bmc packet data convergence protocol pdcp 3. The shown timing diagram shows, that the first arbitrary waveform file is looping seamlessly over the arb file length of 4 frames. Overview of umts wcdma technology 8 wcdma specifications channel bandwidth 5 mhz duplex mode fdd and tdd downlink rf channel structure direct spread ds chip rate 3. Each gsm superframe composed of multiframes either 26 or 51 as described below. Oct 08, 2014 the basic difference between the cdma and wcdma is bandwidth,cdma uses 1. Wcdma was adopted as a standard by the international mobile telecommunications. The subframes may be divided into standard subframes of.