| 摘要 |
Non-urgent data messages of an IP based application hosted by a cellular device are only transmitted when a predetermined condition is met. A data message may be: a presence report; a check for new email sent by an email client to a server; and a keep-alive message sent to a server, but this is not an exhaustive list of the relevant types of data message. The predetermined condition, may, for example, be met when the first of the following occurs: the airlink is open; a maximum delay time has elapsed; a store for non-urgent messages is full; and a maximum number of messages is stored. The invention reduces the number of times when the airlink is open, thus preventing the 3 to 10 seconds additional open time for each occurrence. This saves battery life for the cellular device. The invention is also applicable to other types of messaging in which small data messages are periodically transmitted over an airlink.
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