Bandwidth Management In A Network

• US 20100074271A1
• Filed: 12/01/2009
• Published: 03/25/2010
• Est. Priority Date: 04/28/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Iwamura, Ryuichi
• Granted Patent: US 7,936,775 B2
• Time in Patent Office: Days
• US Class Current: 370/458
• CPC Class Codes: H04L 2012/2843 Mains power line
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/25 with rate being modified by the source upon detecting a change of network conditions
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/762 triggered by the network
• CPC Class Codes: H04L 47/822 Collecting or measuring resource availability data

Abstract

A data stream is transmitted at a current transmission rate utilizing a first bandwidth allocation, the current transmission rate being less than an original transmission rate. A transmission rate recovery request is received from a master device on the network. The transmission rate recovery request instructs the network device to adjust the current transmission rate. An additional bandwidth allocation is obtained from the master device on the network and the current transmission rate is responsively increased to provide substantially the original transmission rate utilizing a total bandwidth allocation. The total bandwidth allocation includes the additional bandwidth allocation and the first bandwidth allocation.

Claims

1. A method for adjusting a transmission rate of a network device, comprising:

transmitting a data stream at a current transmission rate utilizing a first bandwidth allocation, the current transmission rate being less than an original transmission rate;

receiving a transmission rate recovery request from a master device on the network, the transmission rate recovery request instructing the network device to adjust the current transmission rate;

obtaining an additional bandwidth allocation from the master device on the network and responsively increasing the current transmission rate to provide substantially the original transmission rate utilizing a total bandwidth allocation, the total bandwidth allocation including the additional bandwidth allocation and the first bandwidth allocation.

2. The method of claim 1, further comprising:

receiving a bandwidth reduction request from the master device;

releasing a portion of the total bandwidth allocation; and

transmitting the data stream at a reduced transmission rate from the network device.

3. The method of claim 2, wherein the releasing a portion of the total bandwidth allocation triggers the network device to transmit the data stream with a less robust transmission scheme instead of transmitting the data stream at a reduced transmission rate from the network device.

4. The method of claim 1, wherein the additional bandwidth allocation includes allocating of an additional timeslot for data transmission.

5. A method for adjusting a transmission of a transmission for a network device in a network, comprising:

transmitting a data stream at an original transmission rate utilizing a first bandwidth allocation;

subsequently transmitting the data stream at a current transmission rate utilizing a second bandwidth allocation, the current transmission rate being less than an original transmission rate and the second bandwidth allocation being less than the first bandwidth allocation;

receiving a transmission rate recovery request from a master device on the network;

obtaining a third bandwidth allocation from the master device on the network and responsively increasing the current transmission rate to substantially the original transmission rate utilizing a total bandwidth allocation, the total bandwidth allocation including the second bandwidth allocation and the third bandwidth allocation.

6. The method of claim 5, further comprising:

receiving a bandwidth reduction request from the master device;

releasing a portion of the total bandwidth allocation; and

transmitting the data stream at a reduced transmission rate from the network device.

7. The method of claim 6, wherein the releasing a portion of the total bandwidth allocation triggers the network device to transmit the data stream with a less robust transmission scheme instead of transmitting the data stream at a reduced transmission rate from the network device.

8. The method of claim 5, wherein the additional bandwidth allocation includes allocating of an additional timeslot for data transmission.

9. A method for adjusting a transmission rate of a transmission for a network device on a network, comprising:

at a master device;

monitoring the current transmission rate of a network device, the current transmission rate being less than a previous transmission rate, the data being transmitted according to a current bandwidth allocation;

when the monitored current transmission rate fails to meet a predetermined criteria, transmitting a rate adjustment command and an allocation of additional bandwidth to the network device;

at a network device;

receiving the rate adjustment command and the allocation of additional bandwidth from the master device; and

increasing the current transmission rate to approximate the original transmission rate according to the rate adjustment command utilizing a total bandwidth including the current bandwidth and the additional bandwidth.

10. The method of claim 9, further comprising:

determining whether the total bandwidth allocation to the network device is sufficient to allow the network device to increase the transmission rate of the transmission; and

increasing the transmission rate of the transmission only when the total bandwidth allocation to the network device is sufficient to allow the network device to increase the transmission rate of the transmission.

11. The method of claim 9, further comprising:

receiving additional bandwidth from the master device when the unutilized bandwidth associated with the master device increases; and

increasing the rate of transmission to utilize the additional bandwidth allocated to the network device.

12. The method of claim 11, wherein the additional bandwidth allocation includes allocating of an additional timeslot for data transmission.

13. An apparatus for adjusting a transmission rate of a network device, comprising:

an interface including an input and an output;

a controller coupled to the interface, the controller being configured to transmit a data stream at the output of the interface at a current transmission rate utilizing a first bandwidth allocation, the current transmission rate being less than an original transmission rate, the controller being further configured to receive a transmission rate recovery request from a master device on the network at the input of the interface and obtain an additional bandwidth allocation from the master device on the network, the controller being further configured to responsively increase the current transmission rate to substantially the original transmission rate utilizing a total bandwidth allocation, the total bandwidth allocation including the additional bandwidth allocation and the first bandwidth allocation.

14. The apparatus of claim 13, wherein the controller is further configured to receive a bandwidth reduction request from the master device at the input of the interface, and to responsively release a portion of the total bandwidth allocation and transmit the data stream at a reduced transmission rate.

15. The apparatus of claim 14, wherein the release of a portion of the total bandwidth allocation triggers the network device to transmit the data stream with a less robust transmission scheme instead of transmitting the data stream at a reduced transmission rate from the network device.

16. The apparatus of claim 13, wherein the additional bandwidth allocation includes allocating of an additional timeslot for data transmission.