Cdma stands for code division multiple access, invented in the 1940s it was originally designed to control torpedos during the second world war. Differentiate between gsm and cdma telecommunications akshay kumar 070815 pdf. Understanding the difference between gsm and cdma will allow you to choose a carrier that uses the preferable network technology for your needs. This article discusses on the difference between gsm and cdma in terms of technology, security, global reach, sim card, flexibility, radiation emitted. Cdma and gsm are two different technologies used by the carriers and its a difference in the hardware that makes it not possible for you to convert a. The basic difference between gsm and cdma is that gsm is specific to a sim card that is used with the mobile phone. In north america, especially in rural areas, more coverage is offered by cdma as compared to gsm. Whether you use a cdma or gsm network, it does not matter.
The main difference you need to know is that gsm uses a sim card, and cdma does not. Luckily, us mobile has excellent cellular coverage using the best gsm and cdma networks in the us. Gsms highspeed wireless data technology, gprs general packet radio service, usually offers a slower data bandwidth for wireless data connection than cdmas highspeed technology 1xrtt, short for single carrier radio transmission technology, which has. Gsm is in use by 76% of users as compared to cdma which is in use by 24% users. While there are technical differences in how each handles network traffic, for consumers the difference boils down to the fact that gsmbased smartphones store customer id data in sim cards. Both acronyms tend to group together a bunch of technologies run by the same entities. These two technologies differ in the way calls and data travel over the mobile phone networks take place. Difference between cdma and gsm difference between.
The main distinction between gsm and cdma is that in gsm, the customer. The difference between gsm and cdma is how data is received and broadcast in cellphones. On the other hand, in cdma the network identifies a handset by the information stored in the internal memory and hence, its handset specific. On comparing both the technologies gsm has some limitation when the call quality is concerned but still has. Initially gsm was developed to take care of voice communications. As gsm is an international standard, so its better to use gsm in international roaming. Cdma and gsm are both multiple access technologies.
Cdma and gsm are two different types of standards that are available for transmitting data and mobile voice services on a cell phone or mobile phone. Communication and cdma code division multiple access. Gsm handsets came with a sim card slot, while cdma phones did not. Gsm vs cdma difference between gsm and cdma elprocus. The plus moniker signifies the real difference between the two phones. Cdma utilizes a rake receiver with individual fingers to separately from the different paths are all time shifted with respect to each other, due to differences in. The gsm association is an international organization of cellular carriers founded in 1987, provide coverage worldwide using the european etsi wireless standard gsm. Gsm global system for mobile communication and cdma code division multiple access are two dominant technologies for mobile communication. Gsm supports transmitting data and voice both at once, but cdma have not this feature.
On the other hand, in cdma the network describes a handset from the data stored in the internal memory and consequently, its handset special. Gsm global system for mobile communication and cdma code division multiple access are two dominant technologies for mobile. The basic difference between gsm and cdma is that the gsm is a sim specific i. Cdma2000 downstream rate is 2 megabits second, through evdo, where gsm downstream rate is up to 384 kilobits second, through edge technology. Now, what you will prefer to puchase cdma modem dongle or gsm modem dongle. Difference between gsm and cdma with comparison chart. The worlds renowned mobile phone network technologies are gsm global system for mobile. However, the way you use each of these is pretty much the same. Global vs ltecdma vs lte, gsm or umts windows central. What is the difference between cdma and gsm answers. Difference between gsm and cdma explained careershapers. When you make a call, the network assigns a time slot. The crucial difference between gsm and cdma is that gsm uses sim subscriber identification module card as the major component of the mobile station. In gsm, the entire frequency band is not available to the enduser, while in.
On the other hand, cdma is considered as the most secure telephonic network. Cdma code division multiple access and gsm global system for mobiles are shorthand for the two major radio systems used in cell phones. On the other hand cdma is a type of multiple access scheme which. We will try to explain the differences between these two systems. Multiple access technologies are utilized in mobile networks in order to support more users per cell with limited resources. The technology is currently patented by qualcomm and is being used by sprint, verizon and gte. If it was much more better, there would be a world wide competition between gsm and cdma. Difference between cdma and gsm categorized under communication, technology difference between cdma and gsm when we buy a mobile phone, we usually dont concern ourselves with the standards or technologies that our mobile phone uses. Difference between gsm and cdma the worlds renowned mobile phone network technologies are gsm global system for mobile communication and cdma code division multiple access. Gsm stands for global system for mobile communication, while cdma stands for code division multiple access gsm uses fdma frequency division multiple access and tdma time division multiple access. Gsm is important, especially as 5g starts to take off.
The fundamental difference between gsm and cdma is the gsm is a sim specific i. It is used in cellular communication similar to gsm and is a second generation and third generation standard for mobile networks. Gsm and cdma difference channel access method multiplexing. Difference between cdma and gsm mobiles phone gsm vs. However, the one chief difference between the two standards involves the way the data is transformed through the radio waves a smartphone receives and broadcasts.
Difference between tdma and cdma difference between. Difference between cdma and cdma pdf semantic scholar. The major physical difference between gsm and cdma are its dependencies. Gsm is the most widespread in comparison to cdma, thus it provides extensive coverage. The major difference between these two is that cdma is actually a technology, while gsm is actually a standard. Both are cellular wireless technologies developed for mobile communications. Similarly, there are interesting yet significant differences between. The gsm operates on the wedge spectrum called a carrier. Differentiate between gsm and cdma telecommunications. Categorized under communication,technology difference between tdma and cdma tdma vs cdma ever since the invention and commercialization of cellular systems, industry leaders and engineers had already foreseen the inevitable overcrowding of simultaneous callers because the number of accessible channels is very limited. Now reliance is launching removable user identity module rium based cdma phones. Even canadas bell and telus started an hsdpa network, making them able to provide gsm phone selection.
The key difference between gsm and cdma is the multiple access method they use. There are two major differences between the two protocols. Devices like mobile phones built for one standard of communication cannot operate on the other. The sharing of bandwidth in gsm leads to communication lag and interference when a high number of users are active.
Another difference between gsm and cdma is in the data transfer methods. Cdma has the carriers information they want you to use the phone on stored in the phones programming, whereas gsm phones have a semiuniversal software security lock placed on the sim card slot that tells the phone what sim card is allowed to be used. Gsm works on ftdma principle while umts works on cdma principle. Most of the times the multiplexing used are either tdm time division multiplexing or fdm frequency division multiplexing. Following table mentions difference between cdma and gsm technologies. The differences between gsm and cdma are as follows.
The gsm association is an international organization founded in 1987, dedicated to providing, developing, and overseeing the worldwide wireless standard of gsm, while cdma was a standard designed and practically used by qualcomm for the first time. Gsm is a very straightforward standard, whereas cdma is somewhat complicated. The cdma is based on spread spectrum technology which makes the optimal use of available bandwidth. Cdma is very useful as well as interesting from a buyers perspective. Cdma code division multiple access and lte long term evolution are different in sense that cdma is a multiple access technology whilst lte is the next generation mobile communication standards 4g. Cdma mobile networks, gsm stands for global system for mobile communication, and cdma stands for code division multiple access. These two technologies differ in the way calls and data travel over the mobile phone networks. Instead, they rely on a phone number, user and contact information held at the network end.
When you will put gsm sim then your modem will automatically start working like a gsm sim and when you want to use inbuilt cdma network then just eject the gsm sim from your cdma modem dongle and you will start getting network of cdma modems. As against cdma despite using a sim card, operates on esns electronic serial numbers which is a mobile stationspecific identity. Cdma represents multiplexing between numerous signals for optimal bandwidth availability. Before the advent of 4g lte, the obvious difference between gsm and cdma devices were with regards to the sim card.
Tdmafdma, cell frequency planning is more tedium task as frequency and time planning need to be carried out in cdma frequency planning is minimal. The key difference between the two is that gsm is a standard and cdma is a technology, but gsm, over the years has come close to attaining technological status. Cdma is shorthand for code division multiple access, which is one of the major radio systems that are used in cell phones. If youre shopping for a mobile phone, youre in for a lot of acronyms. Gsm coverage market size characteristics data speed cdma worldwide in more than 250 mainly in the americas, asia countries and eastern europe 2. Gsm global system for mobile communications is a standard set developed by the european telecommunications standards institute etsi to describe. Both gsm and cdma standards get multiple access, meaning that a large number of calls can go through a single cell phone tower. Differentiate between gsm and cdma telecommunications mohammad lalbabu 030816 gsm is the 2g digital technology, cdma is the 3g digital technology, cdma is faster then gsm, cdms is provide high speed for data and communication. This carrier is divided into a number of time slots and each. Cdma handsets offer analog capabilities which the gsm dont offer. It is a third generation network developed by ntt docomo and from 2g network cdma. Gsm is considered the worldwide standard for cellular telephone communication. Gsms highspeed wireless data technology, gprs general packet radio service, usually offers a slower.
It is the most secure mode of communication because of its spread spectrum property. Difference between cdma and lte network technology. It allows each user to transfer over the entire frequency spectrum all the time. Gsm is a form of multiplexing, which divides the available bandwidth among the different channels. You must know wcdma which stands for wide band code division multiple access. The difference is that gsm phones, as mentioned, use sim cards as they are easy to replace or removed and put into a different device. Switching gsm phones between different networks is easier than with cdma phones. As the european union permissions gsm use, so cdma is not supported in europe. What matters is the coverage from the cdma and gsm networks. This page on gsm vs umts describes difference between gsm and umts. Comparison between gsm and cdma gms vs cdma both the gsm and cdma are mobile telecommunication standards and work completely differently. The 1900 mhz frequency band is used mainly in the united states. Difference between gsm and cdma in hindi mobile phone.
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