The key difference between gsm and cdma is the multiple access method they use. What we now call cdma uses an entirely different technology, code division multiple access that gsm devices do not use in any way, shape or form. Difference between gsm and cdma with comparison chart. Global system for mobile communications gsm and code division multiple access cdma are the broad category names for the two languages phones use to transmit and receive data. Difference between cdma and cdma pdf semantic scholar. In second and third generation wireless communication a. Both gsm and cdma standards get multiple access, meaning that a large number of calls can go through a single cell phone tower. Gsm is important, especially as 5g starts to take off.
Gsm is an acronym for global system for mobile communications. Difference between gsm and gprs difference between. Difference between gsm and cdma in hindi mobile phone. But engineers couldnt agree on which one was the best. The history gsm during the early 1980s, analog cellular telephone systems were experiencing rapid growth in europe, particularly in scandinavia and the united kingdom, but also in france and germany. Cdma and gsm are the two most essential technologies for mobile telephony. Gsm is a very straightforward standard, whereas cdma is somewhat complicated.
Im trying to decide between two prepaid cell providers for my next phone. Pn codes in the form of walsh codes are assigned for communication. Gsm has served the world in mobile communications for more almost 2 decades and it has served its role very well. In case of cdma, each device like a mobile phone or a wireless modem is given a unique code that is registered with the carrier. The basic gsm global system of mobile communications cellular phone system is tdmabased. Gsm network is consists of mobile station, base station subsystembts. Gsm global system for mobile communications is a standard set developed by the european telecommunications standards institute etsi to describe. On the other hand, cdma is considered as the most secure telephonic network. These two technologies differ in the way calls and data travel over the mobile phone networks. The gsm operates on the wedge spectrum called a carrier. Gsm and cdma are different technologies that phones use to connect.
Data tranfer rate cdma has faster data rate as compared to gsm as evdo data transfer technology is used in cdma which offers a maximum download speed of 2 mbps. Cdma networks are less common and dont generally support gsm phones. Even canadas bell and telus started an hsdpa network, making them able to provide gsm phone selection. Gsm supports transmitting data and voice both at once, but cdma have not this feature. It is a third generation network developed by ntt docomo and from 2g network cdma. On the other hand, in cdma the network identifies a handset by the information stored in the internal memory and hence, its handset specific. Whereas, cdma stands for code division multiple access. Difference between cdma and wcdma difference between. Switching gsm phones between different networks is easier than with cdma phones. In gsm, information in addition as voice each are transmitted at the same time, while cdma have not this facility. You must know wcdma which stands for wide band code division multiple access. Following table mentions difference between cdma and gsm technologies. Understanding the difference between gsm and cdma will allow you to choose a carrier that uses the preferable network technology for your needs. The difference between gsm and cdma is how data is received and broadcast in cellphones.
It allows each user to transfer over the entire frequency spectrum all the time. One runs on a gsm network sort of while the other runs on a cdma. Fundamentals of communications access technologies. 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. In gsm, the entire frequency band is not available to the enduser, while in cdma. Evdo ready mobile phones are required to use this technology. We want equal number of two 0s and 1s, a length of three 0s and 1s and four 0s and 1s etc. Gsm vs cdma difference between cdma and gsm youtube. Cdma is shorthand for code division multiple access, which is one of the major radio systems that are used in cell phones. It is the most secure mode of communication because of its spread spectrum property. Wcdma is a 3g technology that is often used in tandem with. Cdma is mostly owned by qualcomm which makes it a bit expensive for third parties. The most major difference between cdma and wcdma is in the group of technology that it is grouped with.
So, in the us the fcc settled on a dualmode route that required either gsm or cdma. Tdmafdma, cell frequency planning is more tedium task as frequency and time planning need to be carried out in cdma frequency planning is minimal. Cdma stands for code division multiple access, while gsm stands for global system for mobile communication. Difference between gsm and 3g network technology compare. You can put a sim from one phone into a newer one and all your info like phone number and plan will go to the new phone. Gsm stands for global system for mobile communication, while cdma stands for code division multiple access gsm uses the technology named fdma and tdma.
If it was much more better, there would be a world wide competition between gsm and cdma. Wcdma is wideband cdma that still uses code division to divide the channels. Gsm and cdma the cellular mobile service is being used everywhere in the world today. Gsm and cdma are two dominant technologies in the world of mobile communication.
Gsm is in use by 76% of users as compared to cdma which is in use by 24% users. It allows mobile handsets to obtain much higher data speeds than what standard gsm can offer. The basic difference between gsm and cdma is that the gsm is a sim specific i. Difference between cdma and gsm gsm and cdma are two dominant technologies for mobile communication. Cdma as one of the major problems facing the development of telecommunications, bandwidth demand has driven the search for protocols that could be used to maximize bandwidth efficiency. If youre shopping for a mobile phone, youre in for a lot of acronyms. Theyre becoming less relevant in the face of lte and 4g. Gsm stands for global system for mobile evolution, developed based on 3gpp standards. These two technologies differ in the way calls and data travel over the mobile phone networks take place. The type of phone you choose largely depends on what carrier you want to go with, since each offers either. It allow the mobile handset to obtain much higher data speed than what standard gsm can offers.
For cdma spreading code, we need a random sequence that passes certain quality criterion for randomness. Cdma or code division multiple access is often found in the u. If you see an meid or an esn category, your phone requires cdma. It is used in cellular communication similar to gsm and is a second generation and third generation standard for mobile networks.
Difference between cdma and gsm cell phones synonym. Global vs ltecdma vs lte, gsm or umts windows central. Cdma is a 2g technology and is a direct competitor to gsm, which is the most widely deployed technology. Whereas, gsm uses a combination of tdma and fdma methods. It divides up the radio spectrum into 200khz bands and then uses time division techniques to put eight. Ive done a little research to understand the difference between gsm and cdma networks that carriers work on but am still a little confused. There are two main types of mobile phones that are in use all over the world. Both acronyms tend to group a lot of technologies managed by the same entities.
In india, hutch, bharti and bsnl are on gsm whereas reliance and tata tele are on cdma networks. Gsm is the name of a standardization group established in 1982 to create a common european mobile telephone standard that would formulate specifications for a. The gsm association is an international organization of cellular carriers founded in 1987, provide coverage worldwide using the european etsi wireless standard gsm. Gsm and cdma are competing wireless technologies with gsm enjoying about an 82% market share globally. Gsm is considered the worldwide standard for cellular telephone communication. The differences between gsm and cdma 12 years its come to my attention that not everyone understands the subtle yet significant differences between gsm and cdma. Different 3g technologies evolved from different continents and european standard was called as wcdma wideband code division multiple access, north american one is called as cdma2000 while tdscdma time division synchronous cdma standard was used by china. Cdma multiple access by code division and gsm global mobile system are abbreviations of the two central radio systems used in mobile phones. Gsm and cdma are the most successful cell phone technologies present in world, cdma handsets are chip based where as gsm handsets uses sim cards, using the gprs and edge facility gsm is successful. Cdma mobile networks, gsm stands for global system for mobile communication, and cdma stands for code division multiple access.
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. In gsm traffic and signaling follow different multiframe structure. What is the difference between cdma and gsm answers. While gsm and cdma handsets cannot be interchanged even now, and will never be crosscompatible, that wont make a difference as we continue to make a. The main distinction between gsm and cdma is that in gsm, the customer information is put on a sim card. 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. 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 uses time division multiplexing along with other technologies, somewhat similar to the now abandoned us tdma standard. Cdma layers calls over one another and gsm allows multiple users to place calls using the same cellphone. This carrier is divided into a number of time slots and each. Cdma is very useful as well as interesting from a buyers perspective.
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