Midstream determination of varying bandwidth availability

• US 7,634,373 B2
• Filed: 03/21/2006
• Issued: 12/15/2009
• Est. Priority Date: 06/27/2003
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Klemets, Anders E., Choi, Yejin, Grigorovitch, Alexandre V., Batterberry, Troy D., Stewart, James C.
• Primary Examiner(s): Lau; Tung S
• Application Number:
  US11/277,056
• Publication Number:
  US 20060168295A1
• Time in Patent Office: 1,365 Days
• Field of Search: 702/79
• US Class Current: 702/79
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/752 adapting media to network capabilities
• CPC Class Codes: H04L 65/80 Responding to QoS

Abstract

Systems and methods for midstream determination of varying available bandwidth for streaming content between two network entities are described. During content streaming, a client requests a server to surge the content transmission rate. One or more bandwidth measurements are taken during the surge to determine if the increased transmission rate can be adequately managed. If the increased transmission rate can be adequately managed, the client may request the server to transmit remaining content at a transmission rate that is not greater than the increased, or surged, transmission rate. In a multi-bitrate file scenario, the surge rate may be higher than the rate of the fastest useable stream. In such a case, the fastest useable stream is selected. If the increased transmission rate is not suitable for future transmission, then the rate may remain at the original transmission rate.

Claims

1. A method, comprising:

receiving a first request from a client to stream content to the client at a first transmission rate;

streaming content to the client via a network interface at the first transmission rate;

receiving a second request from the client to increase the streaming to a second transmission rate as a surge;

receiving a request from the client to stream a specified amount of content data for the surge;

streaming the specified amount of the content data to the client via the network interface at the second transmission rate, the content data transmitted in discrete packets of data;

resuming streaming the content, after the specified amount of the content data, to the client via the network interface at the first transmission rate; and

receiving a third request from the client to increase the streaming to a third transmission rate that is greater than the first transmission rate and does not exceed the second transmission rate.

2. The method as recited in claim 1, further comprising providing a message to the client of when the content streamed at the second transmission rate begins and when the content streamed at the second transmission rate concludes.

3. The method as recited in claim 1, further comprising streaming subsequent content data to the client at the third transmission rate, wherein the subsequent content is transmitted after the surge has concluded transmission.

4. The method as recited in claim 1, wherein the specified amount of content data to be transmitted at the second transmission rate is identified as a number of seconds of transmission of content data.

5. The method as recited in claim 1, wherein the specified amount of content data to be transmitted at the second transmission rate is identified as a number of data packets to be transmitted.

6. The method as recited in claim 1, wherein the specified amount of content data to be transmitted at the second transmission rate is identified as a number of bytes of content data to be transmitted.

7. One or more computer-readable media containing computer-executable instructions that, when executed on a computer, cause the computer to perform the following steps:

transmitting content file data to a client over a network at a first transmission rate;

receiving a request from the client to transmit the content file data to the client at a second transmission rate, the content file data transmitted in discrete packets of data;

determining a predetermined amount of the content data to transmit to the client;

transmitting the predetermined amount of the content file data to the client at the second transmission rate; and

receiving a second request from the client to adjust the streaming to a third transmission rate that is between the first transmission rate and the second transmission rate.

8. The one or more computer-readable media as recited in claim 7, wherein the instructions further comprise identifying content file data transmitted at the second transmission rate, and wherein further the identifying includes flagging a first data packet of content file data transmitted at the second rate.

9. The one or more computer-readable media as recited in claim 7, wherein the second request includes increasing the streaming to a third transmission rate that is greater than the first transmission rate and does not exceed the second transmission rate.

10. The one or more computer-readable media as recited in claim 7, wherein the predetermined amount of content data to be transmitted at the second transmission rate is identified as a number of data packets to be transmitted.

11. A method of adjusting a transmission rate of streaming content to a client, the method comprising:

streaming content to the client, via a network interface, at the first transmission rate;

providing the client a surge by;

receiving a request from the client to increase the streaming to a second transmission rate;

receiving a data request from the client to stream a specified amount of content data that includes a number of data packets to be transmitted to the client;

streaming the specified amount of content data to the client, via the network interface, at the second transmission rate;

receiving a second request from the client to increase the streaming to a third transmission rate that is greater than the first transmission rate and does not exceed the second transmission rate; and

streaming subsequent content data to the client, via the network interface, at the third transmission rate, wherein the subsequent content is transmitted after the surge has concluded.