Aug 19, 2009 wideband code division multiple access wcdma is the physical layer used for universal terrestrial radio access utra fdd mode. 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. What is the difference between cdma and wcdma networksim. The wcdma technology provides the umts system some of the new functionalities on the air interface. Since the primary scrambling codes are grouped into 64 groups of 8 scrambling codes and the ssch has. The 3g systems support wide band services like high speed internet access. Qos control integrity protection of signalling messages, using a checksum algorithm.
Overview of umts wcdma technology 7 wcdma characterictics support two basic modes. The following is a list of mobile telecommunications networks using thirdgeneration universal mobile telecommunications system umts technology. Jun 19, 2015 wcdma wide band code division multiple access umts before we talk about 4g or gsm. Upper layer layer 3 signaling standard for cdma2000. Parts of the wcdma standard are based on gsm technology. Uchar snddata this radio bearer setup message should match to the. Outline session 1 requirements, historical background, standardization process, 3gpp cdma basics session 2 layer 1. The term is often used interchangeably with umts, which stands for universal mobile telecommunications systems. It is a third generation network developed by ntt docomo and from 2g network cdma. Short for wideband cdma codedivision multiple access, a 3g technology that increases data transmission rates in gsm systems by using the cdma air interface instead of tdma. Wcdma 3g pg2 is a cellular communication module that connects powermaster intrusion alarm system to the alarm central station.
Mac, rlc, pdcp, rrc session 4 performance evaluation. Introduction to tems drive testing is the most common and maybe the best way to analyze network performance. Hsdpa and hsupa were introduced in 3gpp release 5 and 3gpp release 6, respectively. To download this document in power point file click here ppt email this blogthis. Well the theory is that hsdpa doesnt utilizes its ful potential. Mapinfo rf tool for gsm wcdma and lte this version is update from previous version of myrfgsm tool. Radio link control protocol 3 levels of service transparent mode no segmentation and reassembly of rlc sdus no rlc headers are added no delivery guarantees limited to system information, paging messages, and the exchange of rrc connection establishment messages associated with ccch unacknowledged mode segmentation of rlc. Wcdma stands for wideband code division multiple access. This is first technology in which video call possible means voice and data simultaneously transmitted and received between mobile or data card and bts base transmission station. Layer 3 procedures rrc setup and rrc release measurement reports active set update radio bearer setup and reconfiguration transport channel reconfiguration physical channel reconfiguration all call setup and tear down messages such as pdp activationdeactivation, alertingrelease etc these are call control and session management messages. Wcdma was adopted as a standard by the itu under the name imt2000 direct spread. Oct 08, 2014 the basic difference between the cdma and wcdma is bandwidth,cdma uses 1. W cdma wideband code division multiple access wcdma wideband code division multiple access is the radio access scheme used for third generation cellular systems that are being rolled out in various parts of the globe. In january 1998, european telecommunications standards institute etsi decided to choose the wcdma technology to be the multiple access techniques for the thirdgeneration mobile telephone.
When more mobile devices become wcdma capable, the load of gsm layers can be offloaded, while starting lte 1800 mhz refarming from urban towards suburban areas. Upper layer layer 3 signaling standard for cdma2000 spread. The cross reference between gsm, umts, 3gpp and etsi identities can be found under. Prepared by, syed masroor ali pakistan signaling protocol in gsm in any telecommunication system, signaling is required to coordinate the distributed entities of the network. Wcdma and gsm layer priorities gsm lte telecommunication. Wideband code division multiple access wcdma is the physical layer used for universal terrestrial radio access utra fdd mode. To save battery life, im planning to switch from the automatic to the manual mode, and i want to know what happens if i stick to gsm or wcdma. Wcdma wide band code division multiple access umts before we talk about 4g or gsm. Wcdma3g pg2 is a cellular communication module that connects powermaster intrusion alarm system to the alarm central station.
Tinnirello used for routing can be grouped into implicit registration sets if one of the set is registered then the others are as well. Energy consumption of alwayson applications in wcdma networks pdf. Analyzing wcdma call flow using tems wcdma l3 messages log files analysis. It is a layer that exists between ue and enb and exists at the ip level layer 3network layer. This enables a highspeed and highly reliable primary or backup communication channel. The more general term evolved radio access network eran, can also be used as part of signaling protocols, as the term access stratum as can be used. By 2010, 3g technology had become the latest in wireless network speeds and capabilities. Reception of an rrc connection reject message by the ue. It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher. This list does not aim to cover all networks, but instead focuses on networks deployed on frequencies other than 2100 mhz which is commonly deployed around the globe and on multiband deployments. Voice capacity offered is very high due to interference control mechanisms, including frequency reuse of 1. Wcdma vs gsm wcdma wideband code division multiplexing access and gsm are two technologies that are used in mobile telecommunications. Again cdma is 2g telecommunication standard and provide very less data rates compared to wcdma which is. Wcdma, radio network controller, handover, troubleshooting.
Umts uses wideband cdma wcdma as the radio transmission standard. Systesm information layer 3 messages linkedin slideshare. You must know wcdma which stands for wide band code division multiple access. This technical specification ts has been produced by etsi 3rd. Arib selected wcdma, with both fdd and tdd modes operation, in 1997.
Browse internet while downloading a file from a corporate intranet server in the background research for these was conducted by itu and other. Name direction description 1 measurement report ue node b the ue sends a report to the node b including the best detected neighbors and their rscp and ecno and the scrambling code on the uldcch 2 active set update node b ue the node b sends this message to command the ue to add, remove or replace the active set as. The radio resource control rrc protocol is used in umts and lte on the air interface. Analyzing wcdma call flow using tems wcdma l3 messages log. The basic difference between the cdma and wcdma is bandwidth,cdma uses 1. Wcdma is based on cdma and is the technology used in umts. Wcdma is a 3g technology while gsm is a 2g technology.
Using this bandwidth it has the capacity to carry over 100 simultaneous voice calls, or it is able to carry data at. How to verify your lte protocol and rf interactions. 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 comparison reveals that eutran consists of one type of nodes, namely evolved node b enodeb, and the variety of interconnections is. What is the technical difference between selecting gsm and selecting wcdma in network mode settings menu. Wcdma, also known as w cdma or wideband code division multiple access, is a communications standard used in 3g mobile networks. It is one of the main systems used for third generation, or 3g, mobile communication networks. Wcdma was chosen in arib before the process was completed in etsi.
Since the primary scrambling codes are grouped into 64 groups of 8 scrambling codes and. Wcdma city a 112510120110 lups, 20rncs tb 65k wcdma southeast country 0311 lups 897 gb 35k tdscdma city b 11011105 lups, 2rncs 518 gb 15k gprs city c 0603 gb 16 gb 2k table 1. Reception of an rrc connection release message by the ue. 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. 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. The downside to picking wcdma is that it will stop your phone from using 2g networks at all so if youre in an area with no 3g support, then your phone will have no data signal but if youre in an area that you know has good 3g signal, then selecting this will save power. The wcdma technology in japan was very similar to that being considered in europe in etsi.
Wideband code division multiple access wcdma is a cdma channel that is four times wider than the current channels that are typically used in 2g networks in north america. As a result of being fixed, the number of samples per chip will. As wcdma mobile penetration increases, it allows wcdma networks to carry a greater share of voice and data traffic. Jul 02, 2016 3g is new upgraded cdma technology, in simple word its wide band code devision multiple access technology. Wcdma technology provides some advantages for the operator in that it allows the data, but also improves the voice of base. The ue attempts then to read the pcpich so as to extract the primary scrambling code used in the cell. It supports cellular voice, text messaging, mms, and highspeed data transmission. It will also provide mobile broadband access of several mbits to smartphones and data cards in laptops and pcs. What is gsmwcdma and should i leave my settings like this or. Spreading and scrambling transport channel combining soft handover compressed mode power control. Optimizationoptimization is intended to provide the best network quality using available resources as efficiently as possible 3.
Most wcdma phones include gsm as well, for backward compatibility. I have include wcdma and lte on top of current gsm version. 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. Wcdma 2100 mhz introduction and wcdma 900 mhz refarming are typically focused on different environments. The module reports through the 3g network and if not available can switch to report via gprs data channel andor through the gsm network. Wideband codedivision multiple access w cdma is one of the main technologies for the implementation of thirdgeneration 3g cellular systems. Again cdma is 2g telecommunication standard and provide very less data rates compared to wcdma which is third g.
The pcpich is always scrambled by the primary scrambling code of the cell and is spread a factor 256 and an ovsf whose index is zero. Nokia siemens networks lte 1800 mhz introducing lte with. The implementation of w cdma will be a technical challenge because of. Technically wcdma is merely one example of umts technology. What is gsmwcdma and should i leave my settings like this. Wcdma a brief overview stefan parkvall ericsson research slide 2.
Overview of umtswcdma technology 7 wcdma characterictics support two basic modes. In europe, spirent communications in paris is a big user for wcdma including many other companies. Rrc messages are transported via the pdcp protocol. Being newer and more advanced, wcdma is now the technology that people want and it is slowly. The signaling protocol in gsm is structured into three general layers as shown in the following figure. Spreading and scrambling transport channel combining soft handover. The customers and resource in question have typically been messages and storage space in message storage applications or. Wcdma mobility troubleshooting studies and enhancements core. User identity 3 implicitly registered id set 1 public user identity 4 implicitly registered id set 2 service profile 1 service profile 2 service profile 3 ims subscription v. Wcdma is the standard that most gsm carriers moved to when upgrading to 3g. 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. It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher bandwidth. Role of wcdma in 3g mobile communication pc dreams. As part of 3g, it gave network providers the ability to support broadband internet services on mobile devices.
1446 1114 1093 1609 940 998 267 146 110 1396 202 479 671 482 1462 409 1008 361 731 1317 1014 437 1125 466 1466 1038 1517 738 887 309 324 128 185 1038 844 1464 969 457