Short message delivery system

• US 20030050080A1
• Filed: 08/20/2002
• Published: 03/13/2003
• Est. Priority Date: 09/13/2001
• Status: Active Grant

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: NEC Corporation
• Inventors: Uchimura, Ayaka
• Granted Patent: US 7,024,178 B2
• Time in Patent Office: Days
• US Class Current: 455/466
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements
• CPC Class Codes: H04W 88/184 Messaging devices, e.g. message centre

Abstract

A short message delivery system has: mobile terminal devices each having a function of generating and receiving a short message; ground facilities each including a radio station connected to a mobile terminal device by radio means; and a short message center for receiving the short message issued from a mobile terminal device via a ground facility and transmitting the received short message to a specified transmission destination. The short message center includes retry means responsive to a failure of the transmission of the short message for retrying the transmission according to a communication state of a mobile terminal device of reception side and a term of validity of preservation of the short message.

Claims

1. A short message delivery system comprising:

mobile terminal devices each having a function of conveying speech or communication from a place where the mobile terminal device is staying by radio means, and a function of generating and receiving a short message;

ground facilities each including a radio station connected to a mobile terminal device by radio means; and

a short message center for receiving the short message issued from a mobile terminal device via a ground facility and transmitting the received short message to a specified transmission destination, the short message center including retry means responsive to a failure of the transmission of the short message for retrying the transmission according to a communication state of a mobile terminal device of reception side and a term of validity of preservation of the short message.

2. The short message delivery system according to claim 1, wherein the retry means comprises:

a transmission failure message preservation section for providing a short message transmission of which has failed with transmission information, setting a priority, and storing the short message;

a retry control section for controlling retry transmission of short message transmission of which has failed;

a timer for setting an interval of the retry;

a retry counter for counting the number of times of execution of the retry; and

a control section for controlling reception and transmission of the short message and managing the whole retry means.

3. The short message delivery system according to claim 1 or 2, wherein the retry means changes the number of times of retry according to a communication state of a mobile terminal device of a transmission destination of the short message and a term of validity of the short message.

4. The short message delivery system according to claim 3, wherein when a communication failure is judged to be occurrence of a temporary error due to the communication state, the retry means shortens the retry interval.

5. The short message delivery system according to claim 3, wherein

the retry means executes the retry a preset number of times,

when the term of validity is near at hand, the retry means changes the priority of the retry to a high value;

and

when the number of times of the retry has exceeded the preset number of times, the retry means clears a retry count value and changes the priority of the retry to a low value.

6. The short message delivery system according to claim 1, wherein the mobile terminal device is a portable telephone.