Begins Work on Spec for CDMA Access to CDPD
ATLANTA -- Oct. 26, 1994 -- The CDMA Development Group (CDG)
today announced that it has completed specifications for code
division multiple access (CDMA) asynchronous data and short
message services, and has begun work on a specification for
access to cellular digital packet data (CDPD) services using
a CDMA asynchronous data air link.
The CDMA asynchronous data and short message services are
expected to be among the first service offerings available
when CDMA is rolled out in 1995.
Cellular customers typically will use the asynchronous data
mode for enhanced transmission of large data files and faxes.
Packet data mode is especially efficient when only short bursts
of information need to be transmitted for applications such
as credit card verification, dispatch services and vehicle
location. Until now, there has been no North American digital
cellular standard for asynchronous circuit-switched or packet
The CDG is working closely with the CDPD Forum (an industry
trade association of companies that work together on CDPD
technology issues and commercial deployment) with the goal
that CDMA will serve as an additional air link for CDPD systems.
"Providing CDPD packet data access through CDMA is a
natural. We are committed to making all of the CDPD network
services available on the CDMA air link," said Chuck
Parrish, general manager for GTE Wireless Data and chairman
of the CDPD Forum Working Group. "This cooperation between
the CDMA Development Group and the CDPD Forum will allow carriers
and customers to leverage their investments in CDPD and assure
wire-area CDPD coverage through CDMA and AMPS systems."
CDMA is highly efficient for data transmission because of
its digital control channel, sophisticated error correction
capability and resistance to outside interference (noise).
In addition, CDMA data and voice transmissions are private
because the CDMA information is encoded before it is transmitted
over the cellular air waves.
"We intend not only to offer enhanced voice quality with
CDMA, but new digital features that set the technology apart
from all others," said John DeFeo, president and CEO,
U S West NewVector Group. "These data specifications
will provide immediate advantages to CDMA customers and introduce
a new era of enriched features and service quality standards
to the wireless industry."
Through the short message capability, cellular customers will
be able to integrate voice mail notification, digital paging,
electronic messaging and telephony in a single portable device.
The CDMA Short Message Specification includes the following
group of services:
- Cellular Messaging - alphanumeric messages (up to 256 characters)
sent to a cellular subscriber through a variety of mechanisms
including a terminal, an operator at a cellular service provider
message center, or through automatic voice to data conversion
(voice recognition). Messages can be sent to one cellular
customer or broadcast to a group of customers. The CDMA cellular
phone will store the messages.
- Voice Mail Alert/Notification - automatic notification of
a new message in a subscriber's voice mailbox. The cellular
customer will be able to access the voice mail system with
a "push of a button."
- Digital Paging - service that pages a subscriber by calling
the customer's cellular phone number or a paging service number.
The customer will receive the page as soon as the cellular
phone is turned on. The system also will notify the sender
whether or not the page was received. The cellular phone will
store pages for retrieval and automatic callback.
The cellular system will have the intelligence to process
and store short messages even when the customer's phone is
turned off. As soon as the phone is turned on, the customer
will be notified of messages, pages or voice mail. The system
will forward the messages to the customer and indicate the
priority level of the messages so that the customer can scroll
through top priority messages first.
"The CDMA short message service and data specifications
represent breakthroughs for the cellular industry," said
Al Boschulte, president and chairman of NYNEX Mobile Communications.
"They allow us to offer our customers a complete personal
communications service including both voice and data. This
is possible because the CDMA air interface was designed with
the flexibility to support future services that our customers
The CDMA Development Group was formed to foster the development
of open standards that will facilitate market introduction
of CDMA Services. The voluntary group consists of many of
the world's largest cellular operators and equipment manufacturers.
Currently, there are a dozen technical teams and more than
200 individuals working to define technical specifications
for CDMA features and services.