Communication device and method

• US 9,160,821 B2
• Filed: 08/12/2010
• Issued: 10/13/2015
• Est. Priority Date: 08/25/2009
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Tanaka, Jun
• Primary Examiner(s): Phung, Luat
• Application Number:
  US12/855,225
• Publication Number:
  US 20110051750A1
• Time in Patent Office: 1,888 Days
• Field of Search: 370/394, 370/349, 370/389, 370/392, 370/395.1, 370/428
• US Class Current: 1/1
• CPC Class Codes: H04L 45/245 Link aggregation, e.g. trunking
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

There is provided a communication device performing communication by breaking up a frame into a plurality of links, the communication device includes a dividing means for dividing the frame into units of a predetermined size, a distributing means for distributing the units to a plurality of links, a plurality of storing means for storing the units distributed by the distributed means in payloads of transfer frames for the respective plurality of links, a timer means for measuring a timeout time based on a priority of the frame, and a transmission means for transmitting the transfer frames to another communication device via the plurality of links in one of a case where the units included in the payloads of the transfer frames becomes to a predetermined amount and a case where the timeout time measured by the timer becomes to a predetermined value.

Claims

1. A communication device performing communication by breaking up a frame into a plurality of links, the communication device comprising:

a dividing module to divide the frame into units of a predetermined size;

a distributing module to distribute the units to a plurality of links;

a plurality of storing modules to store the units distributed by the distributing module in payloads of transfer frames for the respective plurality of links;

a timer to measure a time interval, the time interval being variable and being based on a priority value located within the frame; and

a transmission controller to trigger transmission of the transfer frames to another communication device via the plurality of links in one of a case where a number of the units included in the payloads of the transfer frames becomes a predetermined amount and a case where the time interval measured by the timer becomes a predetermined value,

wherein the distributing module stops distributing the units at an end of the frame in a case of being instructed to increase or decrease a number of the links by an operator, so that the communication device is operable to increase or decrease the number of the links as a shortage of communication capacity occurs or a link failure occurs, respectively.

2. The communication device according to claim 1, wherein the distributing module adds restoring data to the units into which the frame is divided so that the units are restored to a former frame on another communication device, the restoring data being added to the units on a front position of each link as many as the plurality of links.

3. The communication device according to claim 2, wherein the restoring data includes an identifier for identifying the restoring data, a sequence number indicating an order of distributing the units, and length data indicating a length of the frame.

4. The communication device according to claim 1, wherein the distributing module adds padding data so that the numbers of the units are even for all the links.

5. The communication device according to claim 1, in a case where a last divided unit does not fill the predetermined size, the distributing module adds padding data so that the last unit fills the predetermined size.

6. The communication device according to claim 1, wherein the timer updates the time interval when the transfer frames are transmitted to another communication device.

7. The communication device according to claim 1, further comprising:

a comparing module to compare a time interval associated with a new frame and a remaining portion of the time interval being measured at present,

wherein the timer measures the time interval associated with the new frame in a case where the time interval associated with the new frame is shorter than the remaining portion.

8. The communication device according to claim 1, wherein the distributing module distributes the units into groups, each group having a plurality of links, and distributes the units to the plurality of links in each group.

9. The communication device according to claim 8, wherein the timer measures the time interval in each group.

10. The communication device according to claim 1, wherein the frame is an Ethernet frame and the priority value is located within the VLAN tag of the Ethernet frame.

11. A communication device performing communication by breaking up a frame into a plurality of links, the communication device comprising:

a memory for storing the frame; and

a processor executing an operation, the operation comprising;

dividing the frame into units of a predetermined size;

distributing the units to a plurality of links;

storing the distributed units in payloads of transfer frames for the respective plurality of links;

measuring a time interval, the time interval being variable and being based on a priority value located within the frame; and

triggering transmission of the transfer frames to another communication device via the plurality of links in one of a case where a number of the units included in the payloads of the transfer frames becomes a predetermined amount and a case where the time interval measured by timer becomes a predetermined value,

wherein said distributing is stopped at an end of the frame in a case of being instructed to increase or decrease a number of the links by an operator, so that the communication device is operable to increase or decrease the number of the links as a shortage of communication capacity occurs or a link failure occurs, respectively.

12. The communication device according to claim 11, wherein the frame is an Ethernet frame and the priority value is located within the VLAN tag of the Ethernet frame.

13. A communication method of a communication device performing communication by breaking up a frame into a plurality of links, the communication method comprising:

dividing the frame into units of a predetermined size;

distributing the units to a plurality of links;

storing the distributed units in payloads of transfer frames for the respective plurality of links;

measuring a time interval, the time interval being variable and being based on a priority value located within the frame; and

triggering transmission of the transfer frames to another communication device via the plurality of links in one of a case where a number of the units included in the payloads of the transfer frames becomes a predetermined amount and a case where the time interval measured by timer becomes a predetermined value,

wherein said distributing is stopped at an end of the frame in a case of being instructed to increase or decrease a number of the links by an operator, so that the communication device is operable to increase or decrease the number of the links as a shortage of communication capacity occurs or a link failure occurs, respectively.

14. The communication method according to claim 13, wherein the frame is an Ethernet frame and the priority value is located within the VLAN tag of the Ethernet frame.