Layer 2 consists of medium access control mac radio link control rlc the broadcast multicast control bmc packet data convergence protocol pdcp 3. Wcdma channel structure and functions free download as powerpoint presentation. A tdma frame is defined on the radio carrier 8 users per carrier channel rate is 270. The frame structure of the physical channels is shown. Consider a onering model where there are k scatterers ipcated t. The operators also offer mobile connectivity to the internet and corporate intranet with maximum bit rate of 384 kbps downlink and both uplink. Wcdma for umts radio access for third generation mobile communications. Multilevel simulation of wcdma systems for thirdgeneration wireless applications dr. Superframe one superframe lasts 720ms, and consists of 72 radio frames.
Being newer and more advanced, wcdma is now the technology that people want and it is slowly being deployed in a lot of. Channelization or spreading code to reach channel rate of 3. It discusses and analyzes the application of 3g technology, such as. Umtstdd is a mobile standard built upon the umts 3g standard, using a. 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. 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. This relation between coverage and capacity is often referred to as the breathing effect of wcdma. The physical layer has interface to both mac and rrc sublayer.
The gsm frame structure is designated as hyperframe, superframe, multiframe and frame. This technology is controlled by the united states government. Indicator channel pich frame format physical downlink shared channel. Asynchronous bs operation 2nd generation narrowband cdma systems require tight interbasestation synchronization. Oct 08, 2014 the basic difference between the cdma and wcdma is bandwidth,cdma uses 1. Ordinary umts is implemented with wcdma wideband code division multiple access technology and frequency division duplexing. 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. Ltea frame structure free download as powerpoint presentation. An ads bench for generating multicarrier 3gpp wcdma. For ease of bs deployment in both indoor and outdoor environments, wcdma supports intercell asynchronous operation.
Each gsm superframe composed of multiframes either 26 or 51 as described below. Wcdma frame structure threshold level during 10 8 interval. Third edition edited by harri holma and antti toskala both of nokia, finland. 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. Wcdma is a 3g technology that is often used in tandem with. The 10 ms frame comprises two half frames, each 5 ms long. 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. What is wideband code division multiple access wcdma. Dchsdpa enables the user equipment ue to receive downlink data on two.
Physical channels1 the physical channel is in a 3layer structure by the time. 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. Wcdma channel structure and functions telecommunications. They should be used to support students thinking as they retell, summarize, andor write. Wcdma system standardization, interfaces and power control. Wcdma is wideband cdma that still uses code division to divide the channels. Lte frame structure and resource block architecture. In wcdma, the coverage and capacity requirement cannot be considered independently, but should be planned at the same time with proper guidelines. 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. The frame structure for the type 2 frames used on lte tdd is somewhat different. The figure below shows the lte frame structure under time division mode tdd type 2 and frequency division.
The most major difference between cdma and wcdma is in the group of technology that it is grouped with. Umts wcdma basic concept 3g 1 duplex telecommunications. Total of 6 slot structure for uplink dpcch 0,1,2 bits for fbi and with or without tfci dpdch sf. Tdma is the widespread type of service that is used in north. 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. 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. 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. Wcdma technology provides some advantages for the operator in that it allows the data, but also improves the voice of base. Lowest layer in this interface is physical layer, phy. Comprehesive coverage of umts 3g news, licensing, business developments, 3g wcdma telecommunication technology, multi media mobile phones and future communications. Cdma is a 2g technology and is a direct competitor to gsm, which is the most widely deployed technology. Hsdpcch uplink physical channel structure with dbdchsdpa one radio frame 10ms 3dtower. Wcdma vs gsm wcdma wideband code division multiplexing access and gsm are two technologies that are used in mobile telecommunications. At first i will center the study in the objectives and main characteristic of this generation.
Voice capacity offered is very high due to interference control mechanisms, including frequency reuse of 1. As wcdma mobile penetration increases, it allows wcdma networks to carry a greater share of voice and data traffic. Multilevel simulation of wcdma systems for thirdgeneration. When i am first trying to study gsm, i got so confused about the overal frame structure. Pdf wcdma system standardization, interfaces and power. Averaging the power delay profile reduces the spurious floor. Wcdma and lte synchronization aspects chronos technology. 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. Wcdma support asynchronous operation in which transmission from. The universal mobile telecommunications system umts is a third generation mobile cellular system for networks based on the gsm standard. Wcdma and ltewcdma and lte synchronization aspectssynchronization aspects the 6th international telecom sync forum, itsf munich, november 2008.
All frames have a header field and a field for payload. Wcdma was adopted as a standard by the international mobile telecommunications. Difference between cdma and wcdma difference between. Again cdma is 2g telecommunication standard and provide very less data rates compared to wcdma which is third g. Path searcher path searcher for a wcdma rake receiver, rev. Two slots make one subframe, which is 1ms long 30,720 t s. Celladvisor analysis of ltetdd inchannel interference. 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.
Ltea frame structure radio technology software defined radio. The subframes may be divided into standard subframes of. 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. Cn core network is responsible for transport functions such as switching and routing calls and data, tracking users usim me. Corresponding to 38400 chips, it is a basic unit of the physical layer. The following figure shows a typical tdscdma frame structure for a traffic timeslot including the symbol numbering convention. Comprehensive coverage of umts 3g news, licensing, business developments, 3g wcdma telecommunication technology, multi media mobile phones and future communications.
Single transport format a low and fixed data rate for the. Browse internet while downloading a file from a corporate intranet server in the background research for these was conducted by itu and other. This page on gsm tutorial covers gsm frame structure including concept of slot, frame,multiframe,superframe and hyperframe. The difference between these two is that gsm is a 2g technology and wcdma is a part of the newer 3g group of technologies. 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.
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. Ordinary umts is implemented with wcdma wideband code. This paper describes a wideband code division multiple access test system developed by nokia. 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. 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. The majority of these will be served by wcdmahspa and lte.
Gsm won the world, being more flexible and cheap open standard 3g added internet. What is the difference between cdma and wcdma networksim. Pdf since 1994, europe and north america have taken divergent approaches to. The basic difference between the cdma and wcdma is bandwidth,cdma uses 1. 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.
In this paper i will discuss about wcdma system, to know it is standardization, it is interfaces and power control. 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. In fdd mode, this is done using frame structure type 1. Wcdma has the capacity to easily handle bandwidthintensive applications such as video, data, and image transmission necessary for mobile internet services. February, 28th 2005 overview in this document i make a study of third mobiles generation systems. The wcdma infrastructure is compatible with gsm mobile radio communication system. 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. A high speed 3g mobile wireless technology with capacity to offer higher data rate than cdma. It discusses and analyzes the application of 3g technology, such as video calls, wireless internet access and remote monitoring. Asynchronous operation leads to the use of different. It assumes a spreading factor of 1 and data fields containing 352 symbols each. Tdma frame structure showing a data stream divided into frames and those.
For example, sccpch is transmitted at the multiples of 256 chips delay from the start of cpichstart of frame timing. Difference between wcdma and gsm difference between. Download as ppt, pdf, txt or read online from scribd. Baseband processing in 3g umts radio base stations diva. The minimum unit being frame or tdma frame is made of 8 time slots. Each radio frame is of duration 10ms and composed of 15 slots. What is umts network architecture radio access radio interface frequency bands umts cdma modulation data channels umts tdd tdsdcdma handover. Frame structure for downlink dedicated physical channel dpch network systems technologies, llc 14. Frequency and time chip, bit, slot, frame synchronisation. Text structure frames aka summary frames, paragraph frames, writing frames frames should not be used as worksheets for students to fillin.
Comparing with tdmafdma technologies, such as gsm, the coverage of a wcdma network cannot be. Assume that the remains constant during travel, o 4. There are two l2 frame format types for the dchs data frames and control frames. Title huawei wcdma nodeb software security target version 1. The umts world is an 3g mobile system news and information provider. Wcdma for umts radio access for third generation mobile communication edited by harri holma and antti toskala. Pdf wcdma system standardization, interfaces and power control. It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher bandwidth applications including streaming and. Analysis of ltetdd inchannel interference lication note mobile operators are embracing lte technology and are aggressively deploying it using two techniques. As a result the mobile would loose the synchronization. It covers both 51 frame multiframe and 26 frame multiframe structure of gsm. Engineering services group wcdma network planning and optimization 80w08531 revision b may, 2006. The lte halfframes are further split into five subframes, each 1ms long. In the following example a wcdma max power test and a wcdma min power test should be executed consecutively.
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