TERMINAL FOR A CONTENT CENTRIC NETWORK AND METHOD OF COMMUNICATION FOR A TERMINAL AND A HUB IN A CONTENT CENTRIC NETWORK

• US 20110280214A1
• Filed: 01/17/2011
• Published: 11/17/2011
• Est. Priority Date: 05/13/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Choi, Sung Chan, Byun, Do Jun, Kim, Jae Hoon, Lee, Ji Hoon, Jang, Myeong Wuk, Park, Joong Hong
• Granted Patent: US 9,756,535 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 67/63 Routing a service request depending on the request content or context
• CPC Class Codes: H04W 36/023 Buffering or recovering information during reselection

Abstract

A method of communication for a terminal in a content-centric network is provided. The method includes suspending a data message associated with a content from being provided to a face before a handover when the handover is expected to occur in the terminal that requests the content, and transmitting, to a hub, a new interest message after the handover associated with the content so that the hub may provide the data message associated with the content to the face after the handover.

Claims

1. A communication method of a terminal in a content-centric network, the method comprising:

sensing whether a handover occurs in the terminal that requests a content while the terminal is provided with a service;

requesting a hub to perform a transmission interruption using an interest message before the handover associated with the content to suspend providing a face before the handover with a data message associated with the content, when the handover is expected to occur; and

transmitting, to the hub, a new interest message after the handover associated with the content so that the hub provides a face after the handover with the data message associated with the content, when the handover is completed.

2. The method of claim 1, wherein the sensing comprises:

sensing whether the terminal is moving based on information about an underlying layer of a network interface; and

determining whether the handover occurs in the terminal based on a change in an Internet protocol (IP) address of the terminal or a change in a prefix of a subnet of the terminal according to the move of the terminal.

3. The method of claim 1, wherein the sensing comprises:

receiving a polling result performed by the hub to sense whether the handover occurs in the terminal; and

determining whether the handover occurs based on the polling result.

4. The method of claim 1, wherein the new interest message comprises new location information of the terminal as a result of the handover.

5. A method of communication for a hub in a content-centric network, the method comprising:

receiving, from a terminal, a request for a transmission interruption for an interest message before the handover associated with the content, when a handover occurs while the terminal that requests a content is provided with a service;

suspending, according to the request, a transmission of a data message associated with the content recorded in a pending interest table that is used for routing, and associated with the interest message received from a face before the handover;

storing, in a content cache, the data message associated with the content recorded in the pending interest table; and

transmitting, to the terminal, the stored data message associated with the content, using a new interest message after the handover associated with the content received from the terminal, after the handover is completed.

6. A method of communication for a terminal in a content-centric network, the method comprising:

sensing whether a handover is completed, wherein the handover occurs while the terminal that requests content is provided with a service; and

requesting a hub to perform an update on a new face after the handover so that the new face after the handover is provided with at least one data message associated with the content transmitted based on an interest message before the handover, after the handover is completed.

7. The method of claim 6, wherein the requesting comprises requesting that information of an incoming face field be modified to a new face after the handover, and the incoming face field indicates a face provided with at least one data message associated with the content from among fields of a pending interest table used for routing.

8. The method of claim 6, the requesting further comprises requesting a transmission, to the face before the handover, of at least one data message associated with the content received by the interest message before the handover associated with the content to be stored in the hub.

9. The method of claim 8, wherein the requesting the transmission comprises requesting the transmission of the at least one data message associated with the content, by piggybacking a control message on the hub, the control message comprising a sequence information list indicating a sequence of the at least one data message associated with the content that is not received by the terminal, after the hub has transferred the at least one data message to the face before the handover.

10. The method of claim 9, wherein the sequence information list comprises at least one of sequence information of a first data message and sequence information of the last data message, from among at least one data message associated with the content that is not received by the terminal, after the hub has transferred the at least one data message to the terminal via the face before the handover.

11. A method of communication for a hub in a content-centric network, the method comprising:

receiving, from a terminal, a request for an update on a new face after a handover, to provide the new face after the handover with at least one data message associated with a content transmitted based on an interest message before the handover associated with the content, after the handover occurs;

modifying incoming face field information to the new face after the handover, the incoming face field indicates a face provided with at least one data message associated with the content from among fields of a pending interest table used for a routing, based on the new face after the handover provided from the terminal; and

transmitting, to the new face after the handover, at least one data message associated with the content.

12. The method of claim 11, wherein the transmitting further comprises:

transmitting, to the terminal via the new face after the handover, the at least one data message associated with the content received via the face before the handover to be stored, by the interest message.

13. The method of claim 11, wherein the transmitting comprises:

receiving, from the terminal, a control message comprising a sequence information list with respect to at least one data message associated with the content transmitted to the terminal via the face before the handover; and

transmitting, to the new face after the handover, the at least one data message associated with the content, based on the sequence information list.

14. A computer-readable storage medium having stored therein program instructions to cause a processor to implement a communication method of a terminal in a content-centric network, the method comprising:

sensing whether a handover occurs in the terminal that requests a content while the terminal is provided with a service;

requesting a hub to perform a transmission interruption using an interest message before the handover associated with the content to suspend providing a face before the handover with a data message associated with the content, when the handover is expected to occur; and

transmitting, to the hub, a new interest message after the handover associated with the content so that the hub provides a face after the handover with the data message associated with the content, when the handover is completed.

15. A terminal for a content-centric network, the terminal comprising:

a sensor to sense whether a handover occurs in the terminal that requests a content while the terminal is being provided with a service;

a requester to request a hub to perform a transmission interruption for an interest message before the handover associated with the content to suspend providing a face before the handover with a data message associated with the content, when the handover is expected to occur; and

a message transmitter to transmit, to the hub, a new interest message after the handover associated with the content so that the hub provides a face after the handover with the data message associated with the content, when the handover is completed.

16. A terminal for a content-centric network, the terminal comprising:

a sensor to sense whether a handover is completed, the handover occurring while the terminal that requests a content is being provided with a service;

an update requester to request a hub to perform an update on a new face after the handover so that the new face after the handover is provided with at least one data message associated with the content transmitted based on an interest message before the handover associated with the content, after the handover is completed; and

a data requester to request a transmission of at least one data message associated with the content to the new face after the handover, by piggybacking a control message on the hub, wherein the control message comprises a sequence information list indicating a sequence of the at least one data message associated with the content that is not received by the terminal after the hub has transferred the at least one data message to the face before the handover.

17. A terminal in a content centric network that requests content from a hub, the terminal comprising:

a receiver configured to receive one or more data messages associated with the requested content from a first face of a hub;

a sensor configured to sense whether a handover is about to occur in the terminal;

a requester configured to request the hub to suspend transmission of the one or more data messages associated with the requested content using the first face, when the handover is expected to occur; and

a message transmitter to transmit, to the hub, an interest message indicating that the handover is completed, when the handover is completed,

wherein, after the terminal transmits the interest message, and after the handover is completed, the receiver receives remaining data messages associated with the requested content from a second face of the hub.

18. The terminal of claim 17, further comprising an update requester configured to transmit a request to the hub to update a transmitting face from the first face to the second face.

19. The terminal of claim 17, further comprising:

a control message generator configured to generate a control message that comprises a sequence list of one or more data messages of the content that were not successfully received by the terminal; and

a data requester configured to transmit the control message to the second face of the hub to inform the hub of the data messages that were not successfully received.

20. A method of a terminal in a content-centric network, the method comprising:

requesting content from a hub;

receiving one or more data messages associated with the requested content from a first face of the hub;

sensing that the terminal is about to perform a handover;

transmitting a request to the hub to request the hub to suspend transmission of the data messages associated with the content using the first face of the hub;

performing the handover;

transmitting a request to the hub to indicate that the handover has been successfully performed and to request receipt of the remaining data messages associated with the content; and

receiving the remaining data messages associated with the content from a second face of the hub.

21. A method of a hub in a content-centric network, the method comprising:

receiving a request for content from a terminal;

transmitting, via a first face of the hub to the terminal, one or more data messages associated with the requested content;

receiving a request to suspend the transmission of a remaining amount of the one or more data messages before completion of transmitting the entire amount of the one or more data messages associated with the content, based on a handover that the terminal is about to perform;

receiving a request from the terminal to resume transmission of the remaining data messages based on the completion of the handover; and

transmitting, via a second face of the hub to the terminal, the remaining data messages associated with the content.