Data distribution system

• US 20020039903A1
• Filed: 04/12/2001
• Published: 04/04/2002
• Est. Priority Date: 04/13/2000
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Niwa, Yushi
• Granted Patent: US 6,983,154 B2
• Time in Patent Office: Days
• US Class Current: 455/456.5
• CPC Class Codes: H04M 2207/18 wireless networks
• CPC Class Codes: H04M 2242/14 with services dependent on location where the service is an information service H04M2242/15; services independent of location H04M3/42229
• CPC Class Codes: H04M 3/50 Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers H04M3/487 takes precedence; centralised dictation systems H04M11/10; Centralised arrangements for recording messages

Abstract

When going to a destination by an electric train and so forth, a user 102 of a mobile type telephone set 101 stores data distribution plan information in a distribution center 105 via a base station 111. In the distribution center 105, based on a mobile plan to the destination, an error data for arrival time at the destination is calculated, and is stored in a data distribution plan information storage section 116. The data distribution plan information storage section 116 subtracts an error time period, after which arrival will be earlier, and generates data distribution plan information. A data transmitting section 113 sets a difference between the current time and distribution scheduled time in a timer circuit 119, and when time has come, transmits a distribution data stored in a distribution data storage section 118 to the mobile type telephone set 101. Even in case that the destination is changed in accordance with the movement of the user 102, since a data necessary at destinations is distributed near the respective destinations, efficient utilization of a memory can be realized.

Claims

1. A data distribution system comprising:

a mobile information table for storing reference required time periods which are references of required time periods required when a radio terminal moves to a destination that is a place of a destination of movement from departure places which are origins of the movement, respectively, and that is a place where utilization of information distributed in advance is conducted by means of the radio terminal, in accordance with mobile means which is used for movement;

movement specifying means for specifying departure places and destinations stored in this mobile information table in accordance with a movement schedule together with starting date and hour of the movement and the mobile means;

error calculating means for calculating an error in time for date and hour which is a reference when the radio terminal arrives at the respective destinations, based on information specified by this movement specifying means;

data distribution plan information generating means for obtaining date and hour when the radio terminal arrives at a destination from the respective departure places using the mobile means specified by said movement specifying means by correcting an error calculated by the error calculating means from the date and hour in case of using the reference required time periods, as date and hour when it arrives at the destination most quickly within a range of the error;

arrival time point detecting means for comparing arrival date and hour corrected for each destination, which is generated by this data distribution plan information generating means, with current date and hour, and detecting a time point when said radio terminal arrives at the respective destinations;

distribution data storing means for storing a data to be distributed to said radio terminal for every destination; and

distribution data distributing means for distributing a distribution data corresponding to a destination from the distribution data storing means every time said arrival time point detecting means detects arrival of said radio terminal at the respective destinations.

2. A data distribution system recited in claim 1, the data distribution system further comprises;

an error table for representing a standard error of dispersion in time of arrival from a departure place to a destination in accordance with the mobile means, and

a coefficient table for storing variation coefficients of an error in date and hour at departure; and

wherein said error calculating means calculates an error by multiplying a corresponding error described in the error table by the variation coefficients of an error in date and hour at departure.

3. A data distribution system recited in claim 2, wherein said variation coefficients of an error in said date and hour are different from each other dependent upon a day.

4. A data distribution system recited in claim 1, said data distribution system further comprises an overwrite means for overwriting the distribution data distributed when the said radio terminal arrived at a previous destination by the distribution data distributed when the above-mentioned radio terminal arrived at the new destination.

5. A data distribution system recited in claim 1, wherein said mobile information table is suitably updated by means of the newest information.

6. A data distribution system comprising:

based on longitude and latitude representing a typical position in destinations that are places where utilization of information distributed in advance is conducted by means of a radio terminal, and areas of those destinations, a longitude and latitude table for contrasting errors between said typical position and other positions in the destinations and storing them;

destination specifying means for specifying destinations stored in this longitude and latitude table;

longitude and latitude measuring means for measuring longitude and latitude at respective time points during movement of said radio terminal;

arrival time point detecting means for detecting a time point when a position measured by the longitude and latitude measuring means arrives within a range of said errors centering around said typical position of a corresponding destination stored in said longitude and latitude table, when said radio terminal moves to a destination specified by said destination specifying means;

distribution data storing means for storing a data to be distributed to said radio terminal for every destination; and

distribution data distributing means for distributing a distribution data corresponding to a destination from the distribution data storing means every time said arrival time point detecting means detects arrival of said radio terminal at the respective destinations.

7. A data distribution system recited in claim 6, said data distribution system further comprises an overwrite means for overwriting the distribution data distributed when the said radio terminal arrived at a previous destination by the distribution data distributed when the above-mentioned radio terminal arrived at the new destination.

8. A data distribution system comprising:

a mobile information table for storing reference required time periods which are references of required time periods required when a radio terminal moves to a destination that is a place of a destination of movement from departure places which are origins of the movement, respectively, and that is a place where utilization of information distributed in advance is conducted by means of the radio terminal, in accordance with mobile means which is used for movement;

movement specifying means for specifying departure places and destinations stored in this mobile information table in accordance with a movement schedule together with starting date and hour of the movement and the mobile means;

longitude and latitude measuring means for measuring longitude and latitude at respective time points during movement of said radio terminal;

error calculating means for successively calculating an error in time for date and hour which is a reference when the radio terminal arrives at a destination by comparing measurement values of this longitude and latitude measuring means with each other;

data distribution plan information generating means for obtaining date and hour when the radio terminal arrives at a destination from the respective departure places using the mobile means specified by said movement specifying means by correcting an error calculated by the error calculating means from the date and hour in case of using the reference required time periods, as date and hour when it arrives at the destination most quickly within a range of the error;

arrival time point detecting means for comparing arrival date and hour corrected for each destination, which is generated by this data distribution plan information generating means, with current date and hour, and detecting a time point when said radio terminal arrives at the respective destinations;

distribution data storing means for storing a data to be distributed to said radio terminal for every destination; and

distribution data distributing means for distributing a distribution data corresponding to a destination from the distribution data storing means every time said arrival time point detecting means detects arrival of said radio terminal at the respective destinations.

9. A data distribution system recited in claim 8, said data distribution system further comprises an overwrite means for overwriting the distribution data distributed when the said radio terminal arrived at a previous destination by the distribution data distributed when the above-mentioned radio terminal arrived at the new destination.

10. A data distribution system recited in claim 8, wherein said mobile information table is suitably updated by means of the newest information.