Telecommunications – Radiotelephone system – Special service
Reexamination Certificate
1997-08-21
2001-01-30
Eisenzopf, Reinhard J. (Department: 2745)
Telecommunications
Radiotelephone system
Special service
C455S412100, C455S414200, C379S088120
Reexamination Certificate
active
06181928
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
The present invention pertains in general to event notification in a client/server environment, and more particularly, to a method and apparatus for message waiting notification in a client/server environment wherein the client and server communicate via a wireless network.
2. Description of Related Art
Wireless data systems which use a client/server architecture are being developed with the principal data service of these data systems being messaging such as, E-mail, fax-mail and voice-mail, among others. In a client/server environment, when a server receives messages for a client, it would be beneficial if a message waiting notification could be sent to alert the client. Although the server could “call” the client to provide the client message waiting notification, all public standards for client/server architectures do not allow the server to call the client. Instead, the client is required to call the server and establish a “session” before notification and other information can be transferred from the server to the client.
In certain applications, such as a circuit data system used in standard analog cellular telephone systems, no notification mechanism exists. In other applications, solutions to address the problem of message waiting notification have been developed, however, each has a drawback. For example, in a Cellular Digital Packet Data (CDPD) system, mobile clients are assigned a fixed Internet Protocol (IP) address. Mobile clients are required to “log into” the server and maintain a continuous connection. The server can then deliver information to the mobile client at any time since a virtual connection is continuously maintained. IP addresses, however, are limited in number and the use of fixed IP addresses required by the Cellular Digital Packet Data system requires the coordination of all mobile device manufacturers.
It has also been suggested that a Short Message Service (SMS) of a mobile telephone system be used as a message waiting notification vehicle. SMS allows a short message to be delivered to a mobile client. This message can be coded with a standard format such that the client recognizes the SMS message as a message waiting notification. SMS, however, is not a reliable notification system. In many mobile telephone systems, SMS is only provided as a secondary service to voice traffic. Therefore, in heavily loaded mobile telephone systems, SMS messages can be delayed indefinitely making SMS an unreliable notification mechanism. Additionally, SMS messages are typically delivered for a fee and many users may not wish to pay for notification messages.
There is a need therefore, for an efficient, reliable and inexpensive method and apparatus for providing message waiting notification from a server to a client in a wireless client/server architecture.
SUMMARY OF THE INVENTION
The present invention comprises a method and an apparatus for effectuating message waiting notification to a client that a server has received a message for the client. Upon receiving a message addressed to the client, the server initiates a telephone call to the client which includes caller identification information. The server inserts a telephone number assigned for message waiting notification into a calling party number field and information pertaining to the message received into a calling party name field of the sent caller identification information. The telephone network then pages the client in response to the initiated telephone call. The server then terminates the telephone call.
Upon receiving the page, a caller identification device positioned within the client receives the caller identification information sent with the initiated telephone call. The client compares the telephone number contained within the calling party number field of the caller identification information against the assigned telephone number. A match indicates that the call is a message waiting notification. The client further reads the calling party name field of the caller identification information to receive the information pertaining to the received message.
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Appiah Charles N.
Eisenzopf Reinhard J.
Ericsson Inc.
Jenkens & Gilchrist P.C.
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