Method for adapting video packet generation and transmission rates to available resources in a communications network

• US 6,618,363 B1
• Filed: 10/09/1998
• Issued: 09/09/2003
• Est. Priority Date: 10/09/1998
• Status: Expired due to Term

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Bahl, Paramvir
• Primary Examiner(s): Hsu, Alpus H.
• Assistant Examiner(s): SHAND, ROBERTA A
• Application Number:
  US09/169,122
• Time in Patent Office: 1,796 Days
• Field of Search: 370/337, 370/314, 370/328, 370/329, 370/345, 370/347, 370/360, 370/366, 370/369, 370/375, 370/378, 370/379, 348/384.1, 348/385.1, 348/387.1, 348/390.1
• US Class Current: 370/329
• CPC Class Codes: H04N 21/234354 by altering signal-to-noise ratio parameters, e.g. requantization
• CPC Class Codes: H04N 21/2385 Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006

Abstract

A full service channel access protocol that supports the integrated transport of voice, video and data communications is provided by dividing a communication channel into a plurality of frames, dividing each of the frames into a plurality of slots, and dividing some of the plurality of slots into a plurality of mini-slots. The mini-slots are provided for use by the multiple communication sources to request the establishment of a new voice, data, or video transmission connection over the communication channel. Additionally, a second one of the plurality of slots is divided into a plurality of second mini-slots for use by the multiple communication sources to request the establishment of a new voice, data, or video transmission connection over the communication channel and for use by the multiple communication sources to augment an existing video connection over the communication channel. The method enables timely and power efficient communications over communication network

Claims

1. In a communication network comprising a communication source in communication with a network router over communication channel comprising a frame divided into a plurality of slots, a method for adjusting the rate at which video communications are issued by the communication source comprising the steps of:

monitoring at the communication source the communication channel to determine the number of slots within the frame that are being made available to the communication source for use in transmitting video information;

comparing at the communication source the number of slots within the frame that are being made available to the communication source for use in transmitting video information against the video capture and compression rate of the communication source; and

adjusting at the communication source the video capture and compression rate as a function of the comparison in order to minimize the difference in the comparison thereby resulting in a more efficient usage of power within the communication source and a more efficient utilization of bandwidth within the communication channel.

2. In a communication network comprising a communication source in communication with a network router over communication channel comprising a frame divided into a plurality of slots, a computer-readable medium for use in connection with the communication source having computer-executable instructions for performing the steps of:

monitoring the communication channel to determine the number of slots within the frame that are being made available to the communication source for use in transmitting video information;

comparing the number of slots within the frame that are being made available to the communication source for use in transmitting video information against the video capture and compression rate of the communication source; and

adjusting the video capture and compression rate as a function of the comparison in order to minimize the difference in the comparison thereby resulting in a more efficient usage of power within the communication source and a more efficient utilization of bandwidth within the communication channel.

3. In a communication network comprising a communication source in communication with a network router over communication channel comprising a frame divided into a plurality of slots, a system for adjusting the rate at which video communications are issued by the communication source comprising:

means for monitoring the communication channel to determine the number of slots within the frame that are being made available to the communication source for use in transmitting video information;

means for comparing the number of slots within the frame that are being made available to the communication source for use in transmitting video information against a video capture and compression rate of the communication source; and

means for adjusting the video capture and compression rate as a function of the comparison in order to minimize the difference in the comparison thereby allowing a more efficient usage of power within the communication source and a more efficient utilization of bandwidth within the communication channel.

4. A method for processing video information by a video transmission device capable of acquiring and compressing the video information, the video transmission device supporting an actual acquisition rate value and an actual compression rate value with respect to video data processed by the video transmission device, the video transmission device being capable of transmitting the video data over a communication channel having a plurality of time ranges for transmission of compressed video information by the video transmission device, the method comprising the steps of:

determining a rate at which the plurality of ranges are made available to the video transmission device to define an available data rate;

determining a potential video acquisition rate value and a potential video compression rate value based on the available data rate;

comparing the potential video acquisition rate value and the potential video compression rate value to the actual acquisition rate value and actual compression rate value; and

adjusting the actual acquisition rate value and actual compression rate value based on the comparison in order to minimize the difference in value between the potential video acquisition and compression rate values and the actual video transmission and compression rate values.