Code Division Multiple Access (CDMA) is a channel transmission standard used by cellular service providers to carry out wireless communication. It is capable of sending a large amount of information in a short amount of time. Information is sent at the same time by several transmitters over one communication channel. This allows the available bandwidth to be used in an optimized manner. English allies first used CDMA during World War II to disrupt German attempts at jamming transmissions. They accomplished this by transmitting their signal over several frequencies causing confusion and making it difficult for the Germans to lock in on their signal.
Base Station Management Application Part (BSMAP)
All Radio Resource Management and Facility Management procedures between the Mobile Switching Center and the Base Station is supported by the BSMAP. BSMAP messages are used only to perform functions at the Mobile Switching Center or the Base Station and are not passed to the Mobile Station or cell phone.
Base Transceiver Station Management (BTSM)
Sending messages between the Base Station Controller and the Base Transceiver Station is made possible by BTSM. It is the Base Station Controller to Base Transceiver Station (BSC - BTS) interface protocol (the A-bis interface). Protocol messages consist of a series of information elements, each containing both mandatory and optional information elements.
Mobile Internet Protocol (Mobile IP)
The ability for nodes to move from one IP subnet to another is possible because of the Mobile IP protocol. Regardless of its current point of attachment to the Internet, the identification of each mobile node is always done via its home address. However, a mobile node also has a "care-of address" whenever it is "away from its home" and this is what provides the information regarding its current point of attachment. The Mobil IP protocol allows registration of the "care-of address" with a home agent which will then move datagrams meant for the mobile node to the care-of address and then to the mobile node.
Tags: Base Station, mobile node, Base Transceiver, Base Transceiver Station, care-of address, Transceiver Station
