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Cellular Networking Perspectives

Covers Wireless Network Protocols


Cellular Networking Perspectives studies standards that define wireless networks at several different layers:

User to Home System (HLR) - TIA/EIA-664 (formerly IS-53) features standard.
IS-53 Rev. A is described in the October, November and December 1993 issues as well as the January 1994 issues. An update was published in the April, 2000 issue.
Mobile to Base Station - AMPS family of air interface standards.
A list of AMPS air interface standards for cellular and PCS is found in the February 1995 issue.
Between call processing elements - TIA/EIA-41 intersystem operations standard.
Descriptions of the various capabilities of this standard that provides intersystem handoff, call delivery, validation, authentication and remote feature control are found in many of our issues.
Between Base Station (BSC) and Mobile Switching Center (MSC) - TIA/EIA-634 "A" interface standard.
Between wireless and billing network elements - TIA/EIA-124 call detail/billing record standard (DMH).
This standard allowing the semi-realtime exchange of call detail or billing records is summarized in the April and May, 1995 issues.
Transport protocols - ANSI and ITU-T (previously CCITT) SS7 and X.25 (layer 2 only: LAPB/HDLC or layers 2 and 3).
SS7, Signaling System Number 7, is the backbone of the IS-41 intersystem operations network for AMPS based networks in North America and around the world. It provides interconnect among most cellular carriers, and will also be used extensively in PCS systems. Routing in an SS7 network can be based on either the physical address of a network element (point code) or on a global title translation. In this latter case, a phone number, credit card number or other logical address is used as routing information. The capabilities of packet switching and flexible addressing make SS7 most suitable for telecommunications network. The only drawback is the cost of interconnection, and for this (and some historical) reasons, some smaller carriers will continue to interface to IS-41 networks using X.25, relying on protocol conversion to access the SS7 backbone network.

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© – Copyright Mon, May 14, 2007: Cellular Networking Perspectives Ltd.