CACHE DEVICE, CACHE CONTROL DEVICE, AND METHODS FOR DETECTING HANDOVER
First Claim
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1. A cache device comprising:
- a storage unit configured to store at least one content and terminal access information received from at least one other cache device; and
a controller configuredto monitor messages transmitted from at least one user terminal for a content retransmission request message,to extract terminal address information of the user terminal from the content retransmission request message when the content retransmission request message is detected, andif the extracted terminal address information is included in the stored terminal access information, to notify a handover of the user terminal to the other cache device which sends the stored terminal access information.
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Abstract
For a user terminal connected to one of cache devices distributed in a network and receiving contents, terminal access information including terminal address information about the user terminal and identification information of the cache device is stored and managed. If a content retransmission request message of the user terminal is detected at other cache device, this is regarded as a handover of the user terminal. This allows a simple detection of handover that occurs during content transmission.
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Citations
20 Claims
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1. A cache device comprising:
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a storage unit configured to store at least one content and terminal access information received from at least one other cache device; and a controller configured to monitor messages transmitted from at least one user terminal for a content retransmission request message, to extract terminal address information of the user terminal from the content retransmission request message when the content retransmission request message is detected, and if the extracted terminal address information is included in the stored terminal access information, to notify a handover of the user terminal to the other cache device which sends the stored terminal access information. - View Dependent Claims (2, 3, 4, 5, 13, 14, 15, 16)
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6. A cache control device, comprising:
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a communication unit configured to transmit or receive data to or from a plurality of cache devices distributed in a network; a memory unit configured to store, for each of the plurality of cache devices, terminal access information including terminal address information about one or more user terminals receiving content in a communication area of the cache device and identification information of the cache device; and a control unit configured to receive terminal access information about a user terminal receiving content from one of the plurality of cache devices, to compare the received terminal access information with the terminal access information stored in the memory unit, and to determine, based on the comparison, whether the user terminal is handed-over. - View Dependent Claims (7, 8, 9, 10, 11, 12, 19, 20)
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17. A method for detecting a handover at a cache device, the method comprising:
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receiving a content request message from a user terminal; providing content corresponding to the content request message to the user terminal; extracting terminal address information of the user terminal from the content request message; creating terminal access information including identification information of the cache device and the terminal address information; and transmitting the terminal access information to one or more other cache devices. - View Dependent Claims (18)
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Specification