WO2013142282A1 - Routing a data packet in a communication network - Google Patents
Routing a data packet in a communication network Download PDFInfo
- Publication number
- WO2013142282A1 WO2013142282A1 PCT/US2013/031714 US2013031714W WO2013142282A1 WO 2013142282 A1 WO2013142282 A1 WO 2013142282A1 US 2013031714 W US2013031714 W US 2013031714W WO 2013142282 A1 WO2013142282 A1 WO 2013142282A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data packet
- value
- routing
- machine
- circuitry
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/12—Shortest path evaluation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/54—Organization of routing tables
Definitions
- a coniniiuheation network includes multiple routers.
- the routers are located ai subnet boundaries that are located between a. sender and a receiver.
- the routers transfer data packets originating from the sender to the intended receiver. Often a
- a method in one aspect, includes receiving a data packet at a routing node that includes a processor. The method also includes de emiiiimg at least one value for the data packet, selecting a muting table from a. plurality of routing tables stored at the routing node in response to the at least one value for the packet and forwarding tie data packet in response to the routing table selected. Each routing table is associated with a respective one cost function.
- a routing node in another aspect, includes electronic hardware circuitry configured to receive a data packet at a routing node, determine at least one value for the data packet; select a routing table from a plurality of routing tables stored at the routing node in response to the at least one value for the packet and forward the data packet in response to the routing table selected.
- Each routing table is associated with a respective one cost function.
- an article in a fu ther aspect, includes a non-transitory computer-readable medium that stores computer-executable instructions. The instructions causing a machine to receive a data packet at a routing node, determine at least one value for the data packet, select: a routing table trom a plurality of routing tables stored at the m ating node in response to the at least one value for the packet and forward the data packet in response to the routing table selected.
- Each rooting table is associated with a respective one cost function.
- Receiving a data packet at a routing node may include receiving the data packet at the routing node from a first link and forwarding the data packet in response the value of the data packet ma include forwarding the data packet to a second link.
- the plurality of routing tables may be combined into a combined table incorporating value-to route associations and selecting a routing table from a plnraliiy of renting tables may include selecting the combined table, Determining the at least one value of the data packet may incl ude determining at least one value located in a header of the data packet.
- Determining at least one value located in a header of the data packet may include determining a Differentiated Services (DlffServ) code point (DSCP) value in the data packet. Determining at least one value located in a header of the data packet may include determining at least one of a. port number value or ID, or a source-destination pair value.
- DlffServ Differentiated Services code point
- FIG. 1 is a block diagram of an example of a communication network.
- FIG. 2 is a Mock diagram of a routing node
- FIG. 3 is a flowchart of an example of a process to forward a data packet.
- FIG, 4 is a block diagram of a computer on the process of FIG , 3 may be implemented.
- a renting node includes a plurality of routing tables with, each routing table corresponding to a respective cost function (versus conventional routing where only one routing table is used). Based on a value In the data packet a routing table is selected that determines where the dais packet is routed.
- a communication network 100 includes nodes 102a ⁇ 102h, file transfer protocol (FTP) transceivers 108a ⁇ 108b and voice transceivers 110a-! 10b.
- the FTP transceiver 108a and the voice t nsceiver 110a are coupled to the node !02a.
- the node 102a is coupled to the node 102b by a link 18a, and is coupled, to the node 102c by a link 118b.
- the node 1 2b is coupled to the node 102d by a link 118c and is coupled to the node 102e by a link 118d.
- the node 1 2c is coupled to the node 1 Old by a link 118f and is coupled to the node 102e by a link 118e.
- the node 102d is coupled to the node !02f by a link ! 18h d is coupled to the node 102g by a link 1.
- the node 102e is coupled to the node 102f by a link 118g a d is coupled to the node 102h. by a link l !8j.
- the node 102f is coupled to the FTP transceiver 108b and the voice transceiver 110b.
- Each of the links l !8a-118j may be one of wired links, fiber ptic links, wireless links or a combination of the three (or any other media that can carry IP tr ffic).
- a routing node 200 includes cost functions 202a-202N, a routing engine 212, routing tables 216a- 2 i 6N ⁇ forwarding engines 202a-202b and egress ports 226a ⁇ 226b.
- Each routing table 216a-21 corresponds to a respective one of the cost function 202a-202N (e.g., the routing table 216a corresponds to the cost function 202a; the routing table 216N corresponds to the cost function 202N).
- the routing engine 212 generates a routing table 21.6a ⁇ 216N for each cost f nction 2G2a-202N.
- the router builds the routing tables 216a-216N. For every given cost function 202a-202N, each one corresponding to one (each) of the data characteri tics to be accommodated on the network, the Routing Engine 212 calculates the cost metric for each candidate route. Then, the Routing Engine 212 builds a ro ting table by selecting the best paths (interfaces) for the data packet's destination.
- the routing node 200 To perform the packet forwarding, the routing node 200 first selects the routing table by using the value determined for the packet by methods that include one of various packet classification schemes available (e.g., Differentiated Services (DifiServ) Cods Point (DSCP), port number or ID, source-destination pair, and so forth). Then, the routing node 200 selects a forwarding path (interface or egress pott) based on the routing table and on the destination address. If multiple paths exist fox the targeted address, the routing node 200 supports equal -cost or unequal-cost load balancing.
- DifiServ Differentiated Services
- DSCP Differentiated Services Cods Point
- the routing node 200 distributes traffic evenly or proportionally with respect to the cost metric among those routes, making them equal in cases where the metrics are of equi alent value.
- the routing en ine 212 receives topology and link stale updates through the collections 242a, 242b and updates the r uting tables 216a ⁇ 216N based on cnrrent network conditions (e.g., loading, capacity, delay/latency and so forth).
- the cost functions 202a-202N cars (optionally) be stored in a 5 central location for ease of network management and provided to the node 200 for local storage and use.
- a cost function may be based at least one of bandwidth, load, delay, reliability and so forth parameters and the user may weight these parameters in a cost function.
- different types of data packets may not function 10 efficiently in a communication network using only one particular cost function. For example, one can construct a generic cost function for mobile ad-hoc networks
- MANET such as:
- a user will select a suite of .1 ' (henceforth described as a "vector") that applies differently depending on traffic class of the packet being routed. For example, consider two traffic streams, i.e., FTP and voice.
- the user sets FTP's jT-vector to (2.0,U) to weight bandwidth ami load.
- the it-vector can be set to (0,1,1 ,1) to weight its delay sensitiveness.
- the JT values of one traffic type would compromise the performance of the other traffic type because these different traffic types warrant different JT-vector.
- different types of data packets may fonetion more efficiently in a network using a different cost function.
- the links 252a, 252b provide data packets to a respective one of the forwarding engine 222a, 222b.
- the forwarding engines 222a, 222b based on one or more values in a data packet determines the appropriate routing table to use (i.e., the appropriate cost function to use) and provides the data packet to the appropriate egress port 226a, 226b.
- the egress ports 226a, 226b provide data packets to a respective link 262a, 262b,
- an example of a process to route data packets is a process
- Process 300 receives a data packet (302).
- the router 200 receives a packet from one of the links 252a, 252b.
- Process 300 determines a vaiue(s) from the dat packet (308).
- the forwarding engine 222a determines a vaiue(s) from the data packet.
- the value corresponds to a. traffic class in the header of the data packet.
- the value is a Differentiated Services (DiffServ) code point (DSCP) value.
- Dif!Serv uses a 6-bit Differentiated Services Field (DS field) in the IP header for packet classification purposes which generates up to 64 (2*) values.
- DS field Differentiated Services Field
- Other values may include, but are not limited to, a port number or ID, source-destination pair, and so forth,.
- Process 300 selects a routing table based on the va!ue(s) from the data packet (314). For example, the forwarding engine 222a selects a routing table based, on the DSCP value in the data packet.
- Each routing tabic corresponds to one cost function and each entry in the table describes the best route for a given destination address (for that particular traffic type), in some examples, there may exist multiple best routes in the table ibr a gives destination f there are equally good.
- Process 300 determines a destination address from a header of the data packet (322), For example, the forwarding engine 222a determines a destination address by using the destination address in the IP header of the data packet.
- Process 300 selects the egress port from the selected routing table based on the destination address (330). For example * the forwarding engine 222a selects one of the egress ports 226a, 226b by looking up the destination address hi the selected routing table.
- Process 300 forwards the data packet to the selected egress port (338).
- the forwarding engine 222a forwards tie data packet the selected egress ports.
- a routing node 200' includes a processor 402, a volatile memory 404, a non-volatile memory 406 (e.g., hard disk) and the user interface (UI) 408 (e.g., a graphical user interface, a mouse, a keyboard, a display, touch screen and so forth).
- the non-volatile memory 406 stores computer instructions 412, an operating system 416 and data 418 such as cost functions 422 and routing tables 428, h one example, the computer instructions 12 are executed by the p ocessor 402 out of volatile memory 404 to perform all or part of the processes described herein (e.g., process 300),
- process 300 are not limited to use with the hardware and software of FIG. 4; they may find applicability in any computing or processing environment and with any type of machine or set of machines that is capable of running a computer program.
- the processes described herein may be implemented in hardware, software, or a combination of the two.
- the processes described herein m ay be implemented in computer programs executed on programmable computers/machines that
- each includes a processor, a non-transitory machine-readable medium or other article of manufacture that is readable by the processor (including volatile and non-volatile memory and/or storage elements), at least one input device, and one or more output devices.
- Program code may be a lied to data entered using an input device to perform any of the processes described herein and to generate output information.
- the system may be implemented, at least in part, via a computer program product, (e.g., in a non-transitory machine-readable storage medium such as, for example, a non-transitory computer-readable medium), for execution by, or to control the operation of, data processing apparatus (e.g., a programmable processor, a computer, or multiple computers).
- data processing apparatus e.g., a programmable processor, a computer, or multiple computers.
- Each such program may be implemented in a high level procedural or object-oriented programming language to work with the rest of the computer-based system. However, the programs may be implemented in assembly; machine language, or Hardware Description Language.
- the language may be a compiled or an interpreted language and it may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing
- a computer program may be deployed to be executed on one computer or on multiple computers at one site or distributed across multiple sites and interconnected by a communication network.
- a computer program may be stored on a non-transitory machine-readable medium that is readable by a general or special purpose programmable computer for configuring and operating the computer when the non-transitory machine- readable medium is read by the computer to perform the processes described herein.
- the processes described herein may also be implemented as a non-transitory machine-readable storage medium, configured, with a computer program, where upon execution, instructions in the computer program cause the computer to operate in accordance with the processes.
- a non-transitory machine-readable medium may include but is not limited to a. ban! drive, compact disc, flash memory, non-volatile memory, volatile memory, magnetic diskette and so forth b t does not include a transitory signal per .
- any of the processing blocks of FIG. 3 may be re-ordered, combined or removed, performed in parallel or in serial, as necessary, to chieve the results set forth above.
- multiple .routing tables may be combined in to a single routing table.
- value-to-route associations are incorporated (directly or indirectly) into the combined renting table thereby enabling the appropriate route selection to be made.
- the processing blocks (for example, in the process 300) associated with implementing the system may be performed by one or more programmable processors executing one or mors computer programs to perform the functions of the system.
- All or part of the system may be implemented as, special purpose logic circuitry (e.gsten, an FPGA (field-programmable gate array) and/or an ASIC (application-specific integrated circuit)).
- All or part of the system may be implemented using electronic hardware circuitry that include electronic devices such as, for example, at least one of a processor, a memory, programmable logic devices or logic gates.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2867577A CA2867577C (en) | 2012-03-20 | 2013-03-14 | Routing a data packet in a communication network |
EP13714112.3A EP2829027B1 (en) | 2012-03-20 | 2013-03-14 | Routing by selecting a routing table from a plurality of routing tables |
AU2013235426A AU2013235426B2 (en) | 2012-03-20 | 2013-03-14 | Routing a data packet in a communication network |
JP2015501788A JP5938139B2 (en) | 2012-03-20 | 2013-03-14 | Routing data packets in communication networks |
Applications Claiming Priority (2)
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US201261613131P | 2012-03-20 | 2012-03-20 | |
US61/613,131 | 2012-03-20 |
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WO2013142282A1 true WO2013142282A1 (en) | 2013-09-26 |
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PCT/US2013/031714 WO2013142282A1 (en) | 2012-03-20 | 2013-03-14 | Routing a data packet in a communication network |
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US (1) | US10333839B2 (en) |
EP (1) | EP2829027B1 (en) |
JP (2) | JP5938139B2 (en) |
AU (1) | AU2013235426B2 (en) |
CA (1) | CA2867577C (en) |
WO (1) | WO2013142282A1 (en) |
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CN110391982B (en) * | 2018-04-20 | 2022-03-11 | 伊姆西Ip控股有限责任公司 | Method, apparatus and computer program product for transmitting data |
US11228525B2 (en) * | 2019-09-05 | 2022-01-18 | Raytheon Company | Mission context routing data communication system |
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- 2013-03-14 US US13/827,029 patent/US10333839B2/en active Active
- 2013-03-14 AU AU2013235426A patent/AU2013235426B2/en active Active
- 2013-03-14 JP JP2015501788A patent/JP5938139B2/en active Active
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Also Published As
Publication number | Publication date |
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AU2013235426B2 (en) | 2015-11-26 |
CA2867577A1 (en) | 2013-09-26 |
JP6236116B2 (en) | 2017-11-22 |
AU2013235426A1 (en) | 2014-10-09 |
JP5938139B2 (en) | 2016-06-22 |
JP2016201802A (en) | 2016-12-01 |
US20130250955A1 (en) | 2013-09-26 |
JP2015514357A (en) | 2015-05-18 |
CA2867577C (en) | 2019-07-02 |
US10333839B2 (en) | 2019-06-25 |
EP2829027A1 (en) | 2015-01-28 |
EP2829027B1 (en) | 2020-01-01 |
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