Transmitting apparatus, transmitting method, receiving apparatus, receiving method, transmitting and receiving system, and transmitting and receiving method
First Claim
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1. A transmitting apparatus comprising a transmitting device for transmitting a hierarchical structure of a directory for hierarchically managing locations of contents data, comprising:
- managing means for managing a hierarchical structure of a directory composed of a container entry and a leaf entry, a container entry containing information in the immediately lower hierarchical level thereof, a leaf entry being disposed in the immediately lower hierarchical level of a container entry, a leaf entry not containing information in the immediately lower hierarchical level thereof;
detecting means for detecting a change of the hierarchical structure of the directory managed by said managing means and obtaining first difference information and second difference information corresponding to the detected result, the first difference information being the difference of container entries, the second difference information being the difference of leaf entries; and
first transmitting means for transmitting said first difference information at first predetermined time cyclically;
second transmitting means for transmitting said second difference information at second predetermined time cyclically; and
third transmitting means for transmitting third difference information for reproducing the hierarchical structure of the directory at a third predetermined time period;
wherein said third predetermined time period is variably designated in accordance with operating state information collected by monitoring operating states of at least one of a receiving side.
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Abstract
A transmitting apparatus is disclosed, that comprises a transmitting means for transmitting the same contents of update information a plurality number of times, the update information representing that data has been updated, wherein the transmission timing of the same contents of the update information transmitted by the transmitting means is designated corresponding to operating state information of receiving means that receives the update information from the transmitting means.
35 Citations
26 Claims
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1. A transmitting apparatus comprising a transmitting device for transmitting a hierarchical structure of a directory for hierarchically managing locations of contents data, comprising:
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managing means for managing a hierarchical structure of a directory composed of a container entry and a leaf entry, a container entry containing information in the immediately lower hierarchical level thereof, a leaf entry being disposed in the immediately lower hierarchical level of a container entry, a leaf entry not containing information in the immediately lower hierarchical level thereof; detecting means for detecting a change of the hierarchical structure of the directory managed by said managing means and obtaining first difference information and second difference information corresponding to the detected result, the first difference information being the difference of container entries, the second difference information being the difference of leaf entries; and first transmitting means for transmitting said first difference information at first predetermined time cyclically; second transmitting means for transmitting said second difference information at second predetermined time cyclically; and third transmitting means for transmitting third difference information for reproducing the hierarchical structure of the directory at a third predetermined time period; wherein said third predetermined time period is variably designated in accordance with operating state information collected by monitoring operating states of at least one of a receiving side. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for transmitting a hierarchical structure of a directory for hierarchically managing locations of contents data, the method comprising the steps of:
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managing a hierarchical structure of a directory composed of a container entry and a leaf entry, a container entry containing information in the immediately lower hierarchical level thereof, a leaf entry being disposed in the immediately lower hierarchical level of a container entry, a leaf entry not containing information in the immediately lower hierarchical level thereof; detecting a change of the hierarchical structure of the directory managed at the managing step and obtaining first difference information and second difference information corresponding to the detected result, the first difference information being the difference of container entries, the second difference information being the difference of leaf entries; transmitting said first difference information at first predetermined time period; transmitting said second difference information at second predetermined time period; and transmitting third difference information for reproducing the hierarchical structure of the directory at a third predetermined time period, wherein the third predetermined time period is variably designated corresponding to the operating state information of a receiving side.
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9. A receiving apparatus for receiving a hierarchical structure of a directory for hierarchically managing the locations of contents data that is transmitted, comprising:
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receiving means for receiving first difference information transmitted at first predetermined time period, second difference information transmitted at second predetermined time period, and third difference information transmitted at a third predetermined time period variably designated in accordance with operating state information collected by monitoring operating states of the receiving means, the first difference information being obtained by detecting a change of container entries, the second difference information being obtained by detecting a change of leaf entries, the directory being composed of container entries and leaf entries, a container entry containing information in the immediately lower hierarchical level thereof, a leaf entry not containing information in the immediately lower hierarchical level thereof, the third difference information being transmitted at a predetermined time period, the third difference information being capable of reproducing the hierarchical structure of the directory; and managing means for managing the hierarchical structure of the directory formed corresponding to the first difference information, the second difference information, and the third difference information received by said receiving means. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A receiving method for receiving a hierarchical structure of a directory for hierarchically managing the locations of contents data that is transmitted, comprising the steps of:
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receiving first difference information transmitted at first predetermined time period, second difference information transmitted at second predetermined time period, and third difference information transmitted at a third predetermined time period variably designated in accordance with operating state information collected by monitoring operating states of the receiving means, the first difference information being obtained by detecting a change of container entries, the second difference information being obtained by detecting a change of leaf entries, the directory being composed of container entries and leaf entries, a container entry containing information in the immediately lower hierarchical level thereof, a leaf entry not containing information in the immediately lower hierarchical level thereof, the third difference information being transmitted at a predetermined time period, the third difference information being capable of reproducing the hierarchical structure of the directory; and managing the hierarchical structure of the directory formed corresponding to the first difference information, the second difference information, and the third difference information received at the receiving step.
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17. A transmitting and receiving system for transmitting a hierarchical structure of a directory for hierarchically managing locations of contents data and receiving the transmitted hierarchical structure, comprising:
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first managing means for managing a hierarchical structure of a directory composed of a container entry and a leaf entry, a container entry containing information in the immediately lower hierarchical level thereof, a leaf entry being disposed in the immediately lower hierarchical level of a container entry, a leaf entry not containing information in the immediately lower hierarchical level thereof; detecting means for detecting a change of the hierarchical structure of the directory managed by said first managing means and obtaining first difference information and second difference information corresponding to the detected result, the first difference information being the difference of container entries corresponding to the detected result, the second difference information being the difference of leaf entries; first transmitting means for transmitting said first difference information at first predetermined time period; second transmitting means for transmitting said second difference information at second predetermined time period; third transmitting means for transmitting third difference information for reproducing the hierarchical structure of the directory at a third predetermined time period; receiving means for receiving the first difference information, the second difference information, and the third difference information transmitted by said third transmitting means; and second managing means for managing the hierarchical structure of the directory formed corresponding to the first difference information, the second difference information, and the third difference information received by said receiving means; wherein the third predetermined time period is variably designated corresponding to the operating state information of a receiving side that receives the third difference information transmitted by said third transmitting means. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A transmitting and receiving method for transmitting a hierarchical structure of a directory for hierarchically managing locations of contents data and receiving the transmitted hierarchical structure, the method comprising the steps of:
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managing a hierarchical structure of a directory composed of a container entry and a leaf entry, a container entry containing information in the immediately lower hierarchical level thereof, a leaf entry being disposed in the immediately lower hierarchical level of a container entry, a leaf entry not containing information in the immediately lower hierarchical level thereof; detecting a change of the hierarchical structure of the directory managed at the first managing step and obtaining first difference information and second difference information corresponding to the detected result, the first difference information being the difference of container entries corresponding to the detected result, the second difference information being the difference of leaf entries; transmitting said first difference information at first predetermined time period; transmitting said second difference information at second predetermined time period; transmitting third difference information for reproducing the hierarchical structure of the directory at a third predetermined time period; receiving the first difference information, the second difference information, and the third difference information transmitted at the third transmitting step; and managing the hierarchical structure of the directory formed corresponding to the first difference information, the second difference information, and the third difference information received at the receiving step, wherein the third predetermined time period is variably designated corresponding to the operating state information of a receiving side that receives the third difference information transmitted at the third transmitting step.
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Specification