Presence data management method

• US 7,610,343 B2
• Filed: 03/18/2004
• Issued: 10/27/2009
• Est. Priority Date: 01/09/2004
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kawakami, Norihiko, Kawai, Eri, Ikezawa, Mitsuru
• Primary Examiner(s): Donaghue; Larry D
• Application Number:
  US10/802,776
• Publication Number:
  US 20050154698A1
• Time in Patent Office: 2,049 Days
• Field of Search: 709/238, 709/228, 709/206
• US Class Current: 709/206
• CPC Class Codes: H04L 67/2895 Intermediate processing functionally located close to the data provider application, e.g. reverse proxies
• CPC Class Codes: H04L 67/303 Terminal profiles
• CPC Class Codes: H04L 67/54 Presence management, e.g. monitoring or registration for receipt of user log-on information, or the connection status of the users
• CPC Class Codes: H04L 67/5651 Reducing the amount or size of exchanged application data
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 8/18 Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data

Abstract

The amount of data of presence information delivered from a presence server to a terminal is reduced by letting the presence server discard part of the presence information depending on communication measures and data type available to the terminal, by which the amount of data processed by the terminal is reduced. The presence server fetches terminal information stored therein based on terminal information contained in a presence inquiry request message from a user and thereby learns the type of data that can be processed by the terminal of the user. The presence server reconstructs the presence information of a referred user into information that can be processed by the terminal, and sends the information to the application of the terminal. By reducing the amount of presence data transmitted from the presence server to the terminal, the amount of data to be processed by the terminal can be cut down.

Claims

1. A presence data management method implemented by a plurality of devices connected by a network and a presence server storing referred information on the users of the devices that the users agreed to disclose, comprising the steps of:

receiving an information reference request from the device of a user requesting information reference;

detecting information processing functions of the device of the user as an information reference requester;

processing the referred information on a referred user requested by the information reference requester depending on the detected information processing functions; and

sending the processed referred information to the device of the information reference requester.

2. The presence data management method according to claim 1, wherein the detecting step is executed in response to a change of the referred information on the referred user requested by the device of the information reference requester.

3. The presence data management method according to claim 1, wherein:

the presence server stores information on the information processing functions as an attribute of the device of the user as the information reference requester, and

the detecting step is executed by referring to the stored attribute.

4. The presence data management method according to claim 1, wherein:

the referred information includes multiple types of information of different media attributes, and

the referred information on the referred user to be sent to the device of the information reference requester is selected depending on the detected information processing functions in the processing step.

5. The presence data management method according to claim 4, wherein in the selecting step, the selection of the referred information is carried out by comparing media attributes supported by the device of the information reference requester obtained by checking the detected information processing functions with the media attributes of the stored referred information.