WO2005008992A1 - Description de contenu de paquets dans un reseau de communication par paquets - Google Patents
Description de contenu de paquets dans un reseau de communication par paquets Download PDFInfo
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- WO2005008992A1 WO2005008992A1 PCT/FR2004/001781 FR2004001781W WO2005008992A1 WO 2005008992 A1 WO2005008992 A1 WO 2005008992A1 FR 2004001781 W FR2004001781 W FR 2004001781W WO 2005008992 A1 WO2005008992 A1 WO 2005008992A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/325—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the network layer [OSI layer 3], e.g. X.25
Definitions
- the invention relates to packet communication networks implementing protocols organized in layers as standardized in the OSI (“Open System Interconnection”) reference model defined by the International Organization for Standardization, known as ISO or which may be assimilate it. More particularly, the invention relates to a method of operating a node of a packet communication network, in particular an IP router. It also relates to a data packet for a packet communication network and a data packet generator for a packet communication network. Optimizing the transmission of packets transmitted in a packet communication network such as a network using IP (from the English "Internet Protocol”) is based on the specific processing of packets at the level of network nodes depending on their content. In the case of an IP protocol network, the nodes are traditionally called routers.
- OSI Open System Interconnection
- the mechanisms of quality of service or QoS in networks include a differentiated treatment of packets transmitted on the network, according to parameters such as the sender, the recipient or the type of data contained in the packet.
- Network nodes process packets based on these parameters, for example by assigning routing, bandwidth, priority, or any other suitable characteristic.
- Quality of service is in particular essential to guarantee the transmission under good conditions of packets containing voice or video, in particular in the case of voice over IP or video over IP. It is therefore necessary to be able to determine these parameters in order to manage packet flows correctly and efficiently.
- There are software such as PacketShaper TM from the American company
- the router makes this estimate of the type of data contained in the packet by examining the packets to determine the protocols used in the part of the packets corresponding to the OSI layers 5 to 7 (i.e. layers 5 to 7 of the OSI reference).
- the router can in particular determine that the protocol used is FTP (from the English “File Transfer Protocol”) or HTTP (from the English “Hypertext Transfer Protocol”).
- the router possibly examines the other parts of the packet to determine the type of data contained in the packet, for example by recognizing the signature of an application or of a type of data present among the data in the body of the packet (called "paylaod").
- the router assumes that the packet belongs to a predefined processing category according to the recognized protocol as well as any recognized signature.
- the packet is then classified in the predefined category, and the router applies the treatments corresponding to this category to it.
- This method has drawbacks, however.
- the protocol is not recognized by an router that is not updated. The router can therefore no longer assume the content of such a data packet.
- the router can then no longer manage the quality of service according to the content of a packet.
- the same protocol can be used for different types of data.
- the HTTP protocol is used both for the transport of interactive content and for the transfer of static files, and only allows information to be transported on the data which is transported in a sequence of packets (typically a TCP stream) and not by a single package.
- the router cannot precisely determine the type of data solely according to the transmission protocol used.
- the router is therefore not always able to correctly recognize the type of data contained in the packets.
- the quality of service is therefore not optimal since the different types of data may require different technical requirements.
- Another possibility for supplying the parameters useful to the routers would consist in using a known signaling protocol which is provided for supplying information of this type.
- SIP protocol from the English “Session Initiation Protocol” which makes it possible to send messages containing the type of data transported in a packet flow.
- this solution has drawbacks because the messages are sent from a sending network element to a receiving network element and are not designed to facilitate their interpretation by routers.
- the subject of the invention is therefore a method of operating a node of a packet communication network, in particular an IP router, comprising the steps of: a) reception by the node of a packet from the network ; b) reception by the node of information independent of the protocols of the OSI layers 5 to 7 of the packet and concerning at least one of the following characteristics: ' "- the type of data transported in the packet, - the source of transmission data transported in the packet other than the network address of the source of transmission of the packet, and - the recipient of the data transported in the packet other than the network address of the source of transmission of the packet; c) processing of the packet by the node according to said description It is even more advantageous that the information received in step b) is independent of the protocols of the OSI layers 4 to 7 of the packet.
- said information is contained in the packet, step b) comprising the reading of said information in the packet by the node.
- Said information can in particular be contained in the header to the protocol of the OSI layer 3 of the packet, step b) then comprising the reading by the node of said information in the header to the protocol of the OSI layer 3 of the package.
- the packet contains an identifier of said information, step a) comprising the reading of the identifier by the node.
- the identifier can in particular be contained in the header to the protocol of the OSI layer 3 of the packet, step a) comprising the reading by the node of the identifier in the header to the protocol of the OSI layer. 3 of the package.
- step b) comprises the reception by the node of another packet from the network, said other packet containing said information.
- Said information can in particular be contained in the protocol header of the OSI layer 3 of said other packet, step b) then comprising the reading by the node of said information in the header to the protocol of the OSI layer 3 of said other package.
- the method according to said information can be contained in the body according to the protocol of the OSI layer 3 of said other packet, step b) then comprising the reading by the node of said information in the body according to the protocol of the OSI layer. 3 of said other package.
- said other packet also contains the identifier, step b) also comprising the reading by the node of the identifier in said other packet.
- the identifier can in particular be contained in the protocol header of the OSI layer 3 of said other packet in which case step b) comprises the reading by the node of the identifier in the protocol header of the OSI 3 layer of said other package.
- the method can also advantageously include, after step b), a step of sending by the node to a database, the identifier and said information.
- the method comprises, after step a) and before step b), a step of interrogation by the node of a database with the identifier.
- the invention also proposes a data packet for a packet communication network, comprising information independent of the protocols of the OSI layers 5 to 7 of the packet and concerning at least one of the following characteristics: - the type of data transported in the packet, - the source of transmission of the data transported in the packet other than the network address from the source of transmission of the packet, and - the recipient of the data transported in the packet other than the network address of the source of transmission of the packet.
- said information is contained in the protocol header of the OSI layer 3 of the packet.
- the packet is in the IP protocol, said information being contained in the IP header.
- FIG. 1 a schematic representation an example of a transmission network in which the invention is implemented;
- FIG. 2 a structure of a data packet containing a description of data;
- FIG. 3 a structure of a data packet containing a data description identifier;
- FIG. 4a a structure of a data packet containing both a data identifier and a data description in the header of the packet;
- FIG. 1 a schematic representation an example of a transmission network in which the invention is implemented
- FIG. 2 a structure of a data packet containing a description of data
- FIG. 3 a structure of a data packet containing a data description identifier
- FIG. 4a a structure of a data packet containing both a data identifier and a data description in the header of the packet;
- FIG. 1 a schematic representation an example of a transmission network in which the invention is implemented
- FIG. 2 a structure of a data packet containing a description of data
- FIG. 3 a structure of a data packet
- FIG. 4b a structure of a data packet containing a data description identifier placed in the header of the packet and a data description placed in the body of the packet;
- FIG. 5 a structure of a data packet containing a description of data in the body of the packet.
- the operating method of a node of a packet communication network comprises the steps of: ⁇ ) reception by the node of a packet from the network; b) reception by the node of information independent of the protocols of the OSI layers 5 to 7 of the packet and concerning at least one of the following characteristics: - the type of data transported in the packet, the source of transmission of the transported data in the packet other than the network address of the source of transmission of the packet, and the recipient of the data transported in the packet other than the network address of the source of transmission of the packet; c) processing of the packet by the node according to said description.
- the time order of steps a) and b) is indifferent. In other words, step a) can be after or before step b).
- Steps a) and b) can also be concomitant, in particular in the case where said information is contained in the packet itself. It will be understood that said information can relate only to any one of the characteristics indicated in step b), or any two of them or even all three. They may also include other information concerning for example the processing to be carried out by the node on the packets. The fact that said information is supplied to the node therefore allows the latter to process the packet - for example to choose a path in the network - as a function of said information. In other words, the processing of the packet no longer depends solely on the information conventionally contained in the packet for this purpose such as the network address of the source of the packet and the network address of the final recipient of the packet.
- the node can read and understand said information without knowing these protocols. In other words, the node is able to process the packet according to said information without knowing the protocols of layers 5 to 7. It is even more advantageous that said information is independent of the protocol of the layer OSI 4 used in the packet, which allows the node to process the packet based on this information regardless of this protocol. Indeed, a network node may not be able to analyze the corresponding layer of packets that it receives or it is undesirable that it should be able to do so for reasons of speed of processing. Said information is advantageously written according to a code or language that the node is capable of understanding. This code or language can always be the same whatever the package concerned.
- said information can be included in the package itself. This makes it possible to send said information simply and reliably to the network node to process the corresponding data packet. It is advantageous that said information is completely contained in the packet concerned by the information because it acts in a simple way to ensure that the node always receives said information for each of the packets. If, on the contrary, said information was distributed in several packets, the node must reconstitute it from the plurality of packets by scheduling them adequately, which makes the operation more complex. In addition, the node may be unable to reconstruct the information if it does not receive one of them, for example in the event of a change in the routing path in the network.
- each packet may simply contain - instead of said information an identifier of said information, the identifier being independent of the protocols of the OSI layers 5 to 7, or even of the OSI layers 4 to 7, used in the packet.
- the node determines said information which corresponds to the identifier for processing each packet as a function of said information.
- Said information can be supplied to the node by various means such as by a packet which contains it or by a database which it interrogates.
- the invention is particularly suitable for being implemented in an IP protocol network (which corresponds to the OSI layer 3).
- FIG. 1 schematically represents an example of a packet communication network 1, in this case a network with the IP protocol.
- the network
- I comprises a terminal 2 sending data packets via a subnet 3 to a final recipient, not shown.
- the subnetwork 3 is provided with routers 4 to 7 providing several routing paths to the data packets through the subnet 3.
- the terminal 2 comprises a generator 8 of data packets which can be of any known type, for example. example a software application for voice or video transmission over IP.
- the generator 8 generates IP protocol data packets which are sent to the final recipient through the subnet 3 thanks to an appropriate interface 9 of the terminal 2.
- FIG. 2 shows the structure of a packet 10 comprising an IP header
- the header 1 1 includes a description 1 3 of the useful data contained in the body 1 2 of the package.
- the body 12 contains the useful data to be transmitted to the final recipient of the packet and which may be in the format of a protocol of an OSI layer higher than the IP layer, the latter being a protocol corresponding to the OSI layer 3.
- the body 1 2 can conventionally contain a header to a protocol corresponding to the OSI 4 layer (known as the transport layer) such as TCP (from the English “Transmission Control Protocol”) or UDP (from the English “User Datagram Protocol”) encapsulating the useful data to be transmitted to the recipient of the packet.
- TCP from the English “Transmission Control Protocol”
- UDP from the English “User Datagram Protocol
- the data is in the format of a protocol of the application layer of the IP model which corresponds to the OSI layers 5 to 7 as mentioned above.
- This data can for example be voice over IP or video over IP.
- the routers 4 to 7 are provided for reading the description of data 13 placed in the IP header 1 1 of the packets they receive and processing each packet according to the description 1 3 contained in its IP header.
- the fact that the data description 13 is placed in the IP header of the packet 10 is advantageous since the router can read it by analyzing only the IP header 1-1 of the packet.
- a router is conventionally capable of analyzing IP headers. On the contrary, it does not need to process the body 1 2 of the package.
- the router does not need to know the protocol or protocols of the OSI layers 4 to 7 which are possibly used in the body 12 of the packet. Consequently, it is avoided that the router has to do processing on the data in the body 12 of the packet and in particular on the useful data transported, the router not being intended to carry out this type of processing.
- the router is able to process the data description 13 whatever the protocol or protocols of the OSI layers 4 to 7 used in the body 12 of the packet.
- the complete description 13 being contained in the packet to be processed, the router does not need to reconstitute the description beforehand by reading several different packets that it reorders before it can process a packet according to the data description.
- This embodiment is particularly suitable for being implemented with IPv au protocol packets because such a packet has a header 1 1 of sufficient size to include a description of data.
- the data description 1 3 can in particular be placed in a header extension (called “extension header” in English) of the IPv ⁇ header, for example a header extension of the type says "Hop-by-Hop Options".
- this embodiment can also be implemented with IPv4 protocol packets, for example by entering the data description 1 3 in an option of the header 1 1.
- the data description 13 in the case cited where the data description 13 is placed in a header extension, it can for example be a predetermined code placed in the header extension immediately following of its own header. Under IPv4, in the case cited where the data description 13 is placed in a header option, it can in particular be the byte coding the type of option.
- the router can be configured by a routing manager 20 (called in English “Policy Decision Point” or PDP) for example via the IP network itself .
- PDP Policy Decision Point
- each packet 1 0 is processed by the routers according to the data description 13 which is placed in this packet.
- an identifier of the data description is placed in the IP packet sent by the terminal 2. More precisely, an identifier placed in a data packet corresponds to a description of the useful data transported in the packet containing this ID. Again, the identifier can advantageously be included in the IP header of the packet.
- FIG. 3 illustrates the structure of such a packet 1 0a with an identifier 14 of the data description which is placed in the IP header 1 1, the body (or “payload”) of the packet being referenced 1 2.
- the identifier can for example be placed in a header extension or an option respectively in a similar manner to that described for the description of data 1 3 in the first embodiment. Furthermore, it is advantageous to have information in the header 11 of the packet indicating to the router that it contains an identifier 14. Under IPv4 or IPv ⁇ , this can be implemented in a similar manner to the examples. data for the indication of the presence of the data description 1 3 in the first embodiment.
- the routers 4 to 7 can be provided to read the identifier 14 in the IP headers 1 1 of the packets they receive and determine the description of data which corresponds to the identifier 14. Then, the router processes the packet according to the data description corresponding to the identifier 14 contained in its IP header 11.
- This embodiment is advantageous compared to the previous one insofar as the size of the identifier 14 can be less compared to the description of the data, which therefore leaves more space available in the packets for the data useful to be transported.
- An advantageous way is to send an IP packet containing both the identifier 14 and the description of data corresponding to the network over the network. identifier 14. This packet is preferably sent along the path through the network which will be used subsequently by the packets 10a containing the identifier 14 without the data description. Thus, the data description is made available to the routers affected by this packet flow.
- FIG. 4a illustrates an example of the structure of such a packet, referenced 15a, in which the identifier 14 and the data description 13 corresponding to the identifier 14 are both placed in the IP header of the packet 1 5a.
- the body 1 2 of the package can contain useful data.
- the identifier 14 can for example be placed in a header extension and the description 13 in another header extension.
- the identifier 14 and the description 13 may be placed in the same header extension.
- the identifier 14 can for example be placed in a header option and the description 13 in another header option.
- the identifier 14 and the description 13 may be placed in the same header option.
- FIG. 4b illustrates another example of the structure of such a packet, referenced 1 5b, in which the identifier 1 4 is placed in the IP header 1 1 and the data description 1 3 corresponding to the identifier 14 is placed in the body 1 2 of the package.
- the rest of the space available in the body 1 2 of the package can contain data helpful.
- the identifier 14 can for example be placed in a header extension.
- the description 1 3 can be placed at a predetermined location in the body 1 2 of the package.
- the identifier 14 can for example be placed in a header option.
- the description 13 can also be placed at a predetermined location in the body 12 of the package.
- the packet structure of FIG. 4b is particularly suitable for the case where the size of the description 1 3 is too large to be contained in the IP header 1 1. Furthermore, it is advantageous to have information in the header 1 1 of the packet indicating to the router the fact that it contains both an identifier 14 and a description 13. Under IPv4 or IPv ⁇ , this can be set implemented similarly to the examples given for indicating the presence of the data description 1 3 in the first embodiment. When the router receives such a packet containing both the identifier 14 and the description 15, it reads the latter. The router can then process this packet 1 5 as a function of the description 13. Furthermore, the router keeps in memory the identifier 14 and the corresponding description 13.
- the router when the router subsequently receives packets of type 10a containing the identifier 14, it processes these packets according to the description 13 corresponding to the identifier 14 previously stored.
- the routers provide the description of data corresponding to an identifier by sending an IP packet containing both the identifier 14 and the corresponding data description 13, it is preferable to ensure that this packet takes the same path through the network as the subsequent packets including the identifier 14.
- the routers may be provided to apply the same routing to all the packets comprising the same identifier 14, whether it also includes the description 13 or not.
- a packet containing both the identifier 14 and the description 1 3 can be sent only once before other packets of the type 1 0a stream including the identifier 14 without the description 13. But it is more advantageous to send a packet containing both the identifier 14 and the description 1 3 regularly, for example each time after a certain number of packets of the type 10a have been sent. Thus, a router which accidentally lost from its memory the data description 1 3 corresponding to the identifier 14 can put it back in memory.
- the router updates its memory with the data description 13 for the identifier 14 concerned each time it receives such a packet. It can also be provided that the router uses the description 13 which it has in memory for a given identifier 14 only for a predetermined period of time since the reception of the last packet containing both this identifier 14 and this description 13. This expiration duration is preferably defined to be greater than the time separating a packet containing both the identifier 14 and the description 1 3 of the next packet also containing both the identifier 14 and the description 1 3 for the same flow of packets.
- the router when it receives a packet 10a, the router reads the identifier 14 contained in the package. It then interrogates the database 21 with this identifier 14 and the database 21 returns the corresponding data description 13 to it. The router then processes the packet according to the data description 1 3 provided by the database 21. In addition, the router can store in memory the identifier 14 and the corresponding description 1 3. In this case, when the router subsequently receives packets of type 10a containing the same identifier 14, it processes these packets according to the description 1 3 corresponding previously. stored. In other words, the router verifies if it does not already have in memory a description 13 associated with the identifier 14 read in the packet and interrogates the database 21 only if the verification is negative.
- the processing of subsequent packets is faster since it does not waste the time associated with querying the database 21.
- the use of the database 21 is advantageous because a router always has the possibility of knowing the description 1 3 for any identifier even if the path followed by the different packets varies or even if the description 1 3 corresponding to an identifier 14 is accidentally erased in the router memory.
- the terminal 2 can send an IP packet containing both the identifier 14 and the corresponding description 13 to the database 21 -
- the database 21 acknowledges receipt of the terminal 2 by a return message. After receipt of the acknowledgment, the terminal 2 sends the IP packets with the useful data and comprising the identifier 14 to the final recipient.
- the use of the database 21 and the method described above are combined to make available to the routers the description of data corresponding to an identifier 14 which includes sending over the network of an IP packet containing both the identifier 14 and the corresponding data description.
- All the description made regarding the sending of a packet containing both an identifier 14 and the corresponding data description 13 to make available to routers said description 13 is applicable here with the following additional explanations.
- a router receives such a packet containing both the identifier 14 and the corresponding description 1 3, it reads the latter.
- the router sends to the database 21 the identifier 14 and the description 13, which ensures the updating of the database 21. Furthermore, the router processes this packet according to the description 13.
- the router can advantageously keep in memory the identifier 1 4 and the corresponding description 1 3.
- the router when the router subsequently receives packets of type 10a containing the identifier 14, it processes these packets according to the description 13 corresponding to the identifier 14 previously stored. But it can happen that a router does not have in memory the description 1 3 corresponding to an identifier 14 contained in a packet of type 10a. This may be the case because the router accidentally lost it from its memory or because it did not receive the packet containing both the identifier 14 and the corresponding description 1 3. This latter situation can in particular arise when the routers have changed the routing path after the sending of the packet containing both the identifier 14 and the corresponding description 13. In this case, the router interrogates the database 21 with the identifier 14.
- the database 21 provides it with the corresponding description 13.
- the router then processes the packet according to the description 13 provided and stores it for the processing of packets received subsequently and having the same identifier 14.
- a router can be configured by a routing manager 20 (called in English “Policy Decision Point” or PDP), for example via the IP network itself, to define the processing operations to be performed on a packet 10a by the router as a function of the data description 13 which corresponds thereto.
- the database 21 can possibly be part of the routing manager 20.
- it can confine itself to processing - in particular routing - the packet 10a so conventional without taking account of the identifier 14 and the corresponding description 1 3.
- the same identifier 14 is used simultaneously in the network but for different descriptions 1 3.
- routers may take into account additional parameters to distinguish packet flows, for example, the IP address of the source of the packets.
- the data descriptions 13 and / or the identifiers 14 can be placed in the IP packets sent by the terminal 2 by the terminal 2 itself.
- the terminal 2 can include a software application cooperating with the packet generator 8 to place the description 13 and / or the identifier 14 there according to the type of packet to be generated. It can also be is the packet generator 8 which places the description 13 and / or the identifier 14 in the IP packets.
- the first router to which the terminal 2 is connected - in this case the router 4 - which adds in the IP packets coming from the terminal 2 the description 13 and / or the identifier 14 depending on the type of packet to generate.
- the description 13 can be supplied to the first router by the terminal 2 and the router defines an identifier 14 which it matches with the description.
- the description of data 13 can advantageously define the type of useful data transported in the packet or IP packets concerned, such as the fact that it is audio or video data, or more generally that it is data that is part of a real-time data flow or a very large data flow or that this data has a cyclic sending character.
- the description of data can also include technical characteristics relating to the data such as for example the sampling frequency for audio data.
- the routers will then be able to process - in particular route - the IP packets not only according to the only destination IP address placed in their header, but also according to the nature of the useful data transported and these other technical characteristics.
- the router can use the most suitable equipment to process the type of data concerned.
- the router or the equipment connected to it can use the most suitable algorithm to assess the quality of service provided to the end user for the audio stream concerned.
- the router can select a specific audio stream management card to perform on-the-fly and on-demand compression in the case of audio data, or to merge several audio and video streams during an IP conference. .
- the data description 1 3 can be supplemented - or replaced - with information concerning the source of the data or the recipient of the data other than their IP address in the network. For example, it can be the patronymic name or the corporate name of the source and / or the recipient. Therefore, the router can process the packets taking this information into account. In particular, the router can route the packets according to routing rules defined for the recipient thus defined with the description of data 13. For example, it can preferentially send packets transporting an image to one of the recipient's machines which has a display suitable for displaying it, independently of the destination IP address specified in the IP header of the packet (s) concerned. .
- the data description 1 3 may also include information concerning the processing to be carried out by the routers traversed, in particular information relating to the quality of service QoS (from the "Quality of Service") to be provided. For example, such information can be the bandwidth to reserve for these data packets. It may also be routing parameters, for example, a preferential routing path defined by the data transmitter, in this case, the terminal 2. It is advantageous for the data descriptions 13 placed in the IP packets are written in XML. Indeed, a description 13 in XML can be interpreted by most routers, the XML schema used for the description being able to be sought on the network for example at a predetermined address thereof. This diagram can then be interpreted by the router to build an internal representation of the information contained in the XML document.
- the routers are able to perform suitable routing, by associating the packets with a buffer size sufficient to absorb the jitter effects that can be encountered in the network, or by choosing a route or a priority of packets according to the identity of recipients and senders.
- the various fields of such a description are preferably standardized.
- An identifier 14 associated with this description may for example take the form of an alphanumeric code such as "voice". It will be understood that the data descriptions can also be written in coded form instead of being close to a natural language more directly understandable by humans as XML allows.
- the present invention is not limited to the examples and embodiments described and shown, but it is susceptible of numerous variants accessible to those skilled in the art.
- FIG. 5 illustrates an example of implementation of the first embodiment in which a description 1 3 is placed in the body 1 2 of an IP packet 1 6 while its IP header 1 1 is of the conventional type.
- the body 12 contains at the end of it a predetermined identification code 1 6 used to indicate to a router receiving the packet that it contains a description 13.
- the body 1 2 contains immediately before the identification code 1 6 a value 1 7 indicative of the length of the description 1 3 in the package 1 6.
- the description 1 3 is placed in the body immediately before the value 17.
- the rest of the body 12 contains the useful data to carry.
- the second embodiment can be implemented in a similar manner, with the identifier 14 which comes replacing the description 13 in the body 1 2.
- a specific predetermined code 1 7 can be defined in the case where the body 1 2 contains both the description 1 3 and the identifier 14.
- the code 1 7 may be preceded by a value 1 7 indicative of the length of the description 13 in the package 1 6, then another value 1 7a indicative of the length of the identifier 14 in the package 1 6, then of the description 1 3 and finally from the identifier 1 -.
- the description 13 and / or the identifier 14 are written in a language independent of the protocols of the OSI layers 5 to 7.
- the routers are able to read the description and the identifier 14 whatever the protocols of the OSI layers 5 to 7.
- the various embodiments have been described for IP protocol packets, it will be understood that the invention can be implemented similarly with d other protocols of the OSI 3 layer (called the network layer).
- the implementation of the invention using the headers at the level of the OSI layer 3 is preferred because the nodes are conventionally provided for routing the packets thanks to this protocol.
- the invention can also be implemented at the level of the headers of the protocols of the OSI 4 layer (known as the transport layer) in the case where it is possible to write therein the data description 13 and / or the identifier. 14 and that the nodes have the capacity to process this protocol or these protocols if there are several used within the same network.
- IPv4 protocol we can refer in particular to document RFC 791.
- IPv ⁇ protocol one can refer in particular to document RFC 2460.
- OSI reference model one can refer in particular to standard ISO 7498.
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/563,960 US20060221929A1 (en) | 2003-07-11 | 2004-07-08 | Description of packet in a packet communication network |
EP04767614A EP1647125A1 (fr) | 2003-07-11 | 2004-07-08 | Description de contenu de paquets dans un reseau de communication par paquets |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0308524A FR2857539B1 (fr) | 2003-07-11 | 2003-07-11 | Description de contenu de paquets dans un reseau de communication par paquets |
FR03/08524 | 2003-07-11 |
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WO2005008992A1 true WO2005008992A1 (fr) | 2005-01-27 |
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PCT/FR2004/001781 WO2005008992A1 (fr) | 2003-07-11 | 2004-07-08 | Description de contenu de paquets dans un reseau de communication par paquets |
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US (1) | US20060221929A1 (fr) |
EP (1) | EP1647125A1 (fr) |
CN (1) | CN1836421A (fr) |
FR (1) | FR2857539B1 (fr) |
WO (1) | WO2005008992A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103401877A (zh) * | 2013-08-09 | 2013-11-20 | 上海斐讯数据通信技术有限公司 | 获取驱动层数据包控制信息的方法及系统 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7471669B1 (en) * | 2004-09-30 | 2008-12-30 | Nortel Networks Limited | Routing of protocol data units within a communication network |
JP2012526500A (ja) * | 2009-05-08 | 2012-10-25 | セーブル ネットワークス,インク | データ通信セッションを制御する方法および装置 |
US8711743B2 (en) | 2010-06-17 | 2014-04-29 | Iminds Vzw | Node and wireless sensor network comprising the node |
US11055222B2 (en) * | 2019-09-10 | 2021-07-06 | Mellanox Technologies, Ltd. | Prefetching of completion notifications and context |
Citations (2)
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WO2002098098A2 (fr) * | 2001-05-30 | 2002-12-05 | Nokia Corporation | Procede pour communiquer une flux de paquets de donnees dans un reseau |
US20030016667A1 (en) * | 2001-07-19 | 2003-01-23 | Alcatel | Taking account of information relating to the environment of active nodes when determining the code associated with an active application |
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JP3489573B2 (ja) * | 2001-07-11 | 2004-01-19 | 日本電気株式会社 | パケット処理装置 |
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2004
- 2004-07-08 CN CNA2004800234723A patent/CN1836421A/zh active Pending
- 2004-07-08 EP EP04767614A patent/EP1647125A1/fr not_active Withdrawn
- 2004-07-08 WO PCT/FR2004/001781 patent/WO2005008992A1/fr active Application Filing
- 2004-07-08 US US10/563,960 patent/US20060221929A1/en not_active Abandoned
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CN103401877A (zh) * | 2013-08-09 | 2013-11-20 | 上海斐讯数据通信技术有限公司 | 获取驱动层数据包控制信息的方法及系统 |
Also Published As
Publication number | Publication date |
---|---|
US20060221929A1 (en) | 2006-10-05 |
EP1647125A1 (fr) | 2006-04-19 |
FR2857539B1 (fr) | 2005-09-30 |
FR2857539A1 (fr) | 2005-01-14 |
CN1836421A (zh) | 2006-09-20 |
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