Perry,
Re: CDMA Terminology and Definitions (Bullet 3 - cdma2000) - CDG Web Site
cdg.org
Since this section of the CDG web site was revamped earlier this year, CDG has accomplished several important milestones, including the recent publication of TIA/EIA/IS-856 "CDMA2000 High Rate Packet Data Air Interface Specification."
Perhaps it is now appropriate to update this cdma2000 terminology and definition:
>> cdma2000 is a name identifying the third generation technology that is an evolutionary outgrowth of cdmaOne offering operators who have deployed a second generation cdmaOne system a seamless migration path that economically supports upgrade to 3G features and services within existing spectrum allocations for both cellular and PCS operators. cdma2000 supports the second generation network aspect of all existing operators regardless of technology (cdmaOne, IS-136 TDMA, or GSM). This standard is also known by its ITU name IMT-CDMA Multi-Carrier (1X/3X).
cdma2000 has been divided into 2 phases. The first phase capabilities are defined in a standard known as 1X. Completed in the July 1999, this phase of cdma2000 carriers the TIA standard name of IS-2000 and the ITU standard name of MC-1X. 1X introduces 144 kbps packet data in a mobile environment and speeds beyond this in a fixed environment. Features available with 1X are a two-fold increase in both voice capacity and standby time, advanced packet data services, as well as greatly extended battery life and improved sleep mode technology. All of these capabilities will be available in an existing 1.25 MHz channel. The second release of 1X is being worked on in the TIA and will support faster data speeds with peak rates up to 614 KBPS.
cdma2000 phase two, known as 3X, incorporates the capabilities of 1X, supports all channel sizes (5 MHz, 10 MHz, etc.), provides circuit and packet data rates up to 2 Mbps, incorporates advanced multimedia capabilities, and includes a framework for advanced 3G voice services and vocoders, including voice over packet and circuit data. <<
Respectfully,
- Eric - |
