Mechanism for application mobility in a cell site-based content distribution network

• US 9,137,708 B2
• Filed: 05/28/2009
• Issued: 09/15/2015
• Est. Priority Date: 05/28/2009
• Status: Active Grant

• Current Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Original Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Inventors: Cao, Yang, Hack, Talbot, Nicolazzo, Michael, Suberri, Moshe, Turner, William M.
• Primary Examiner(s): Winder, Patrice
• Assistant Examiner(s): TRAN, NAM T
• Application Number:
  US12/473,769
• Publication Number:
  US 20100306304A1
• Time in Patent Office: 2,301 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 67/148 Migration or transfer of sessions
• CPC Class Codes: H04W 36/0011 for data sessions of end-to-end connection
• CPC Class Codes: H04W 36/0022 for transferring data sessions between adjacent core network technologies
• CPC Class Codes: H04W 36/0033 with transfer of context information
• CPC Class Codes: H04W 80/12 Application layer protocols, e.g. WAP [Wireless Application Protocol]

Abstract

A method in an electronic device provides a mechanism for maintaining application mobility in a communication network, such as a content distribution network. In one exemplary embodiment, a user device transitions from a source content server in a first access network of the communication network to a destination content server in a second access network of the communication network. The source content server hands off responsibility for serving the content to the destination content server. In some embodiments, a tunnel is created between the source content server and the destination content server.

Claims

1. A method in an electronic device for providing content to a user device in a communication network having an access network and a core network, the method comprising:

serving a first data stream of content from a source content server in the access network to the user device, the content being accessed using a protocol;

identifying that the user device is transitioning from a connection to the source content server to a connection to a destination content server; and

handing over responsibility for serving the content from the source content server to the destination content server, wherein handing over responsibility for serving the content comprises;

creating a tunnel between the source content server and the destination content server,

creating a second data stream over the tunnel, the second data stream being a duplicate of the first data stream,

interacting with a proxy at the destination content server, the proxy corresponding to the protocol used to access the content at the source content server, the proxy having a context, and

moving the context from the protocol at the source content server to the proxy at the destination content server.

2. The method of claim 1, wherein the source local content server is located in a first access network of the communication network, and the destination content server is located in a second access network of the communication network.

3. The method of claim 1, wherein the content comprises streaming content associated with the first data stream on the source content server.

4. The method of claim 1, wherein the tunnel is an IP tunnel.

5. The method of claim 1, further comprising synchronizing the duplicate second data stream with the first data stream on the source local content server.

6. The method of claim 1, wherein the proxy is one of the group of a Real Time Streaming Protocol proxy and a Real Time Transport Protocol proxy.

7. The method of claim 1, further comprising invoking an application related to the content on the destination local content server.

8. The method of claim 1, further comprising:

receiving data related to the content on the destination content server prior to handing over responsibility for serving the content to the destination content server; and

discarding the data.

9. A non-transitory electronic device readable storage medium storing executable instructions for providing content to a user device in a communication network, the communication network comprising an access network and a core network, the instructions causing a processor to:

serve a first data stream of content from a source content server in the access network to the user device, the content being accessed using a protocol;

identify that the user device is transitioning from a connection to the source content server to a connection to a destination content server; and

provide information for handing over responsibility for serving the content from the source content server to the destination content server, wherein the handing over of responsibility for serving the content comprises;

create a tunnel between the source content server and the destination content server,

create a second data stream over the tunnel, the second data stream being a duplicate of the first data stream,

interact with a proxy at the destination content server, the proxy corresponding to the protocol used to access the content at the source content server, the proxy having a context, and

move the context from the protocol at the source content server to the proxy at the destination content server.

10. An electronic device for providing content to a user device in a communication network, the communication network comprising an access network and a core network, the electronic device comprising:

a storage for storing content; and

a processor for executing instructions, the instructions causing the processor to;

serve a first data stream of content from a source content server in the access network to the user device, the content being accessed using a protocol;

identify that the user device is transitioning from a connection to the source content server to a connection to a destination content server; and

hand over responsibility for serving the content from the source content server to the destination content server, wherein the handing over of responsibility for serving the content comprises;

create a tunnel between the source content server and the destination content server,

create a second data stream over the tunnel, the second data stream being a duplicate of the first data stream,

interact with a proxy at the destination content server, the proxy corresponding to the protocol used to access the content at the source content server, the proxy having a context, and

move the context from the protocol at the source content server to the proxy at the destination content server.

11. The electronic device of claim 10, wherein the content comprises streaming content associated with the first data stream on the source content server, and the instructions further comprise instructions causing the processor to:

synchronize the duplicate data stream with the data stream on the source local content server.