Server apparatus and terminal apparatus used in video transmission system
First Claim
1. A server apparatus for sending video data on a packet-by-packet basis, in a video transmission system for sending video data to a terminal unit through an access point, the server apparatus comprising;
- a transmitting section for sending video data on a packet-by-packet basis;
a video data storing section for storing video data and a receiving section for receiving a request from the terminal unit;
wherein the video storing section, when the terminal unit received video data sent from an access point established an association and displayed a video image releases a wireless channel to an access point on which an association is established, stores post-release video data;
the receiving section, when the terminal unit establishes an association of wireless channel to another access point, receiving a request to retransmission the stored post-release video data from the terminal unit.
2 Assignments
0 Petitions
Accused Products
Abstract
Provided is a server apparatus and terminal unit for realizing a video transmission system that, even in case the video image is suspended by a handover, reproduction can be resumed at a video image of upon suspension. In a video transmission system having a video server for sending video data to a terminal unit through an access point and a terminal unit for receiving and displaying the video data sent from the access point and for establishing an association and releasing of a wireless channel to the access point, the terminal unit releases the access point and wireless channel and requests the video server to suspend the transmission and store video data. In case an association is established with a new access point, the terminal unit requests the video server to re-send the video data, etc. stored in the duration of from the release to an association establishment.
87 Citations
9 Claims
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1. A server apparatus for sending video data on a packet-by-packet basis, in a video transmission system for sending video data to a terminal unit through an access point, the server apparatus comprising;
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a transmitting section for sending video data on a packet-by-packet basis;
a video data storing section for storing video data and a receiving section for receiving a request from the terminal unit;
wherein the video storing section, when the terminal unit received video data sent from an access point established an association and displayed a video image releases a wireless channel to an access point on which an association is established, stores post-release video data;
the receiving section, when the terminal unit establishes an association of wireless channel to another access point, receiving a request to retransmission the stored post-release video data from the terminal unit. - View Dependent Claims (2, 3, 4)
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5. A terminal unit for receiving video data sent from an access point established an association and displaying a video image, in a video transmission system for sending video data to the terminal unit through the access point, the terminal unit comprising:
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a video receiving section for receiving video data sent on a packet-by-packet basis;
a video display section for displaying a video image on a basis of the video data;
a transmission-suspension requesting section for sending a transmission-suspension request for suspending to send and storing video data, to a server apparatus for sending video data on a packet-by-packet basis; and
a retransmission requesting section for sending a request to resend video data, to the server apparatus;
wherein the transmission-suspension requesting section, when a wireless channel to an access point established an association is released, forwards a transmission-suspension request of the post-release video data to the server apparatus;
the retransmission requesting section, when established an association of wireless channel to another access point, forwarding a request to resend the stored post-release video data to the server apparatus. - View Dependent Claims (6, 7, 8, 9)
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Specification