ESTIMATING MULTIMEDIA DATA PACKET BUFFERING TIME STREAMED OVER A SELECTED WIRELESS NETWORK

• US 20130033988A1
• Filed: 09/23/2011
• Published: 02/07/2013
• Est. Priority Date: 08/02/2011
• Status: Active Grant

• Current Assignee: Infosys Limited
• Original Assignee: Infosys Limited
• Inventors: Dhanapal, Karthikeyan Balaji
• Granted Patent: US 8,848,540 B2
• Time in Patent Office: Days
• US Class Current: 370/241
• CPC Class Codes: H04L 12/5692 Selection among different networks
• CPC Class Codes: H04L 43/08 Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04W 28/0236 radio quality, e.g. interference, losses or delay

Abstract

A computer-implemented method for estimating buffering time of multimedia data packets for efficient playout of multimedia applications by a mobile device is provided. A wireless network with highest quality of service is selected from a plurality of wireless networks based on recorded information related to multimedia calls placed by the mobile device over the plurality of wireless networks. A multimedia call is placed over the selected wireless network for the mobile device and one or more conditions related to the selected wireless network and the mobile device is monitored. Information related to the one or more conditions of the selected wireless network and the mobile device are gathered. Based on the gathered information, buffering time of multimedia data packets is estimated. Before playout, multimedia data packets that are received by the mobile device are buffered for a predetermined time period corresponding to the estimated buffering time.

Claims

1. A computer-implemented method for estimating buffering time of multimedia data packets for efficient playout of multimedia applications by a mobile device, the computer-implemented method comprising:

selecting a wireless network from a plurality of wireless networks based on Quality of Service (QoS) of the plurality of wireless networks, wherein the wireless network with highest QoS is selected based on recorded information related to multimedia calls placed by the mobile device over the plurality of wireless networks;

placing a multimedia call for the mobile device over the selected wireless network and monitoring one or more conditions related to the selected wireless network and the mobile device, wherein the one or more conditions result in variation in delay of multimedia data packets streamed to the mobile device;

gathering information related to the one or more conditions pertaining to the selected wireless network and the mobile device; and

estimating buffering time of multimedia data packets based on the gathered information, wherein data packets corresponding to one or more multimedia applications that are received by the mobile device are buffered for a predetermined time period before playout, the predetermined time period corresponds to the estimated buffering time.

2. The computer-implemented method of claim 1, wherein the multimedia calls comprise at least one of:

Voice Over Internet Protocol (VoIP) calls and video conferencing.

3. The computer-implemented method of claim 1, wherein selecting a wireless network from a plurality of wireless networks based on Quality of Service (QoS) of the plurality of wireless networks comprises:

placing multimedia calls over each of the plurality of wireless networks via wireless network interfaces in the mobile device that correspond to each of the plurality of wireless networks;

monitoring the multimedia calls placed over each of the plurality of wireless networks;

obtaining one or more information related to the multimedia calls placed over each of the plurality of wireless networks, wherein the one or more information comprises at least information related to quality of the multimedia calls placed over the plurality of wireless networks;

recording the obtained information and storing the recorded information in at least one of;

memory within the mobile device, a central database in the operator'"'"'s network, and in an external website; and

selecting the wireless network from amongst the plurality of wireless networks using the recorded information, wherein the wireless network with highest QoS is selected.

4. The computer-implemented method of claim 3, wherein the one or more information further comprises at least one of:

time and date information related to the multimedia calls placed and location information of the mobile device when the multimedia calls are placed.

5. The computer-implemented method of claim 3, wherein the quality information related to the multimedia calls is obtained by at least one of:

monitoring data packets related to the multimedia calls and capturing information related to delay in the transmission and reception of the data packets, calculating Mean Opinion Score (MOP) of ratings provided by multiple users on one or more parameters that deteriorate the quality of multimedia calls, and using Perceptual Speech Quality Measurement (PSQM) that provides measurement of speech intelligibility associated with the multimedia calls.

6. The computer-implemented method of claim 1, wherein gathering information related to one or more conditions pertaining to the selected wireless network comprises sending a query to a wireless network interface in the mobile device that corresponds to the selected wireless network and monitoring the response to the query, wherein the query response facilitates to determine the retransmission rate of the data packets over the selected wireless network.

7. The computer-implemented method of claim 1, wherein gathering information related to one or more conditions pertaining to the mobile device comprises sending a query to a wireless network interface in the mobile device that corresponds to the selected wireless network and obtaining time interval information related to at least one of:

sleep mode, scan mode, and roaming mode of the mobile device.

8. The computer-implemented method of claim 1, wherein gathering information related to one or more conditions pertaining to the mobile device comprises sending a query to a wireless network interface in the mobile device and obtaining time interval information related to the period for which the mobile device is disconnected with the selected wireless network.

9. The computer-implemented method of claim 1, wherein gathering information related to one or more conditions pertaining to the mobile device and the selected wireless network comprises sending ping packets to an access point in the selected wireless network and processing the query response received from the access point.

10. The computer-implemented method of claim 1, wherein estimating buffering time of multimedia data packets based on the gathered information comprises:

processing information related to one or more conditions of the selected wireless network and the mobile device, wherein the information facilitates to determine the one or more conditions that result in variation in delay of transmission and reception of data packets related to the multimedia calls; and

estimating a predetermined time period for buffering multimedia data packets received by the mobile device before playout based on the processed information.

11. The computer-implemented method of claims 6 and 10, wherein estimating a predetermined time period for buffering multimedia data packets received by the mobile device before playout comprises at least one of:

determining a threshold in case of a retransmission condition of the selected wireless network, wherein the buffering time is increased if the retransmission rate exceeds the predetermined threshold and buffering time is reduced if the retransmission rate is below the predetermined threshold.

12. The computer-implemented method of claims 7, 8 and 10, wherein estimating a predetermined time period for buffering multimedia data packets received by the mobile device before playout comprises at least one of:

ascertaining the time interval for which the mobile device is in any of sleep, scan and roaming mode as the buffering time for data packets and ascertaining the time interval for which the mobile device is disconnected with the selected wireless network.

13. The computer-implemented method of claim 11 further comprises

receiving the estimated buffering time;

and

playing multimedia data packets received by the mobile device after the estimated buffering time.

14. A system for estimating buffering time of multimedia data packets for efficient playout of multimedia applications by a mobile device, wherein the mobile device comprises multiple wireless network interfaces that facilitates the mobile device to communicate with multiple wireless networks, the system comprising:

a wireless network select module in communication with a processor and configured to select a wireless network from amongst the multiple wireless networks based on Quality of Service (QoS) of the multiple wireless networks, wherein the wireless network with highest QoS is selected based on recorded information related to multimedia calls placed by the mobile device over the multiple wireless networks; and

a buffering module in communication with the processor and configured to estimate buffering time of multimedia data packets received by the mobile device over the selected wireless network, where the estimation is performed based on information related to one or more conditions of the selected wireless network and the mobile device, the one or more conditions result in variation in delay of multimedia data packets streamed to the mobile device,

wherein data packets corresponding to one or more multimedia applications that are received by the mobile device are buffered for a predetermined time period before playout, the predetermined time period corresponds to the estimated buffering time.

15. The system of claim 14, wherein the wireless network select module comprises:

a record module in communication with the processor and configured to record one or more information related to multimedia calls placed over the multiple wireless networks, wherein the one or more information comprises at least information related to quality of the multimedia calls; and

a decision module in communication with the processor and configured to facilitate selecting a wireless network with highest QoS based on the recorded information.

16. The system of claim 14, wherein the buffering module comprises a state observer module, the state observer module in communication with the processor and configured to gather time interval information related to one or more conditions of the selected wireless network and the mobile device.

17. The system of claim 16, wherein the buffering module comprises a buffering time estimating module, the buffering time estimating module in communication with the processor and configured to estimate buffering time of data packets related to multimedia data packets received over the selected wireless network based on the time interval information received from the state observer module.

18. The system of claim 17, wherein the buffering module comprises a playout module, the playout module in communication with the processor and configured to play multimedia data packets received over the selected wireless network after a predetermined time period, wherein the predetermined time period corresponds to the estimated buffering time received from the buffering time estimation module.