| 摘要 |
A message exchange network storing messages in memories of message storage entities, e.g., a mobile handset, based on the type and content of information within the message. An information service message containing supercedingly updateable information, e.g., a traffic update, is stored using a replacement method by which a previously stored message is replaced by a newly received message. All other types of messages are stored using a conventional append method. A message identifier within the message itself provides information necessary to distinguish between the aforementioned types of messages. In another embodiment, a block of message identifiers is reserved for storage of information service messages. The architectures and methods for receipt, delivery, and storage of messages enables replaceable and/or on demand update of information service messages, provides efficient use of storage memory, avoids numerous stale/obsolete messages, avoids manual selection and deletion of stale/obsolete messages, and avoids unnecessary delivery of stale/obsolete messages.
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