TIA TIA-102.AACA-2 Project 25 Digital Radio Over-The-Air Reketing (OTAR) Protocol Addendum 2 - Data Link Independent OTAR
 |
| Purchase Information |
| Use this form to request purchase information on TIA online subscriptions. |
|
|
Document TIA TIA-102.AACA-2 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
You may also purchase this document alone from the IHS Standards Store.
TIA TIA-102.AACA-2 Document Information:
Title
Project 25 Digital Radio Over-The-Air Reketing (OTAR) Protocol Addendum 2 - Data Link Independent OTAR
Telecommunications Industry Association
Publication Date:
Mar 1, 2003
Scope:
The Project 25 standard covers all of the parts of a system for public safety land mobile radio communications. These systems include subscriber units, base stations and other fixed equipment. The subscriber units include portable radios for handheld operation and mobile radios for vehicular operation. The base stations are used for geographically fixed installations. Other fixed equipment is used for wide area operation and console operator positions. Computer equipment may be used to interface between each of these equipment items. A Common Air Interface (CAI) (Reference 2) allows these radios to send and receive digital information over a radio channel.
Many of the parts of a public safety land mobile radio communications system will use encryption to protect the information which is sent through the system. The encryption algorithms require keys in order to protect the confidentiality of this information. The process by which these encryption keys are generated, stored, protected, transferred, loaded, used and destroyed is known as key management. These keys must be protected from inadvertent disclosure and require updating or replacement in order to maintain system security. Key distribution is often accomplished manually. However, the most convenient way to distribute keys is to electronically send the keys from a key management facility to the destination equipment. This involves sending keys over the CAI and this procedure is referred to as Over-the Air-Rekeying (OTAR). OTAR is a method of encrypting and sending the encryption keys and other related key management messages through the CAI in such a way that they are protected from inadvertent disclosure and, in some cases, unauthorized modification.
About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.
