EP1794989A1 - Verfahren zur verhinderung von datenpaketverlusten beim aktualisieren einer adresstabelle - Google Patents
Verfahren zur verhinderung von datenpaketverlusten beim aktualisieren einer adresstabelleInfo
- Publication number
- EP1794989A1 EP1794989A1 EP05789680A EP05789680A EP1794989A1 EP 1794989 A1 EP1794989 A1 EP 1794989A1 EP 05789680 A EP05789680 A EP 05789680A EP 05789680 A EP05789680 A EP 05789680A EP 1794989 A1 EP1794989 A1 EP 1794989A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- address
- computer
- zol
- valid
- assignment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000002265 prevention Effects 0.000 title 1
- 101100244969 Arabidopsis thaliana PRL1 gene Proteins 0.000 claims abstract description 12
- 102100039558 Galectin-3 Human genes 0.000 claims abstract description 12
- 101100454448 Homo sapiens LGALS3 gene Proteins 0.000 claims abstract description 12
- 101150051246 MAC2 gene Proteins 0.000 claims abstract description 12
- 101100059544 Arabidopsis thaliana CDC5 gene Proteins 0.000 claims abstract 2
- 101150115300 MAC1 gene Proteins 0.000 claims abstract 2
- 230000005540 biological transmission Effects 0.000 claims description 14
- 239000003550 marker Substances 0.000 claims description 5
- 238000010200 validation analysis Methods 0.000 claims description 2
- 238000013459 approach Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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
- H04L45/54—Organization of routing tables
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
Definitions
- the invention relates to a method for preventing packet loss when updating an address table, which is stored in a computer of a local network and assignments of computer network addresses valid in the local network to computer addresses for the transmission of data packets, wherein a stored in the address table address allocation to Expiration of a validity timer is updated.
- the Internet is generally referred to as a large global but decentralized computer network consisting of many subnetworks.
- Such subnets may be, for example, local area networks.
- These local networks are also referred to as Local Area Networks or LAN for short and can be, for example, computer networks of individual companies or institutions.
- IP Internet Protocol
- the IP is responsible for the connectionless transport of data in packet form - so-called IP data packets - from a computer in a subnet to a destination computer in a subnet across multiple subnets. So that an IP data packet can be routed to a specific computer in a subnetwork, an addressing of the subnetwork computers is carried out in the IP.
- Each computer is assigned a so-called IP address in its establishment on the Internet valid computer address. This addressing is done on layer 3 of the OSI reference model.
- IP address a computer on the Internet or in the subnet to which it is assigned, uniquely addressable. This means that a data packet is transmitted on the basis of this valid in Internet address from a sending computer to a target computer, the two computers are located in different subnets. The forwarding of the data packets between the subnets is based on the IP address.
- the addressing of the individual computers in the local network is additionally performed on layer 2 of the OSI reference model.
- a hardware address the so-called Media Access Control or MAC address
- IP address valid in the Internet.
- Each computer in a local network therefore has at least one MAC and one IP address via which it can be addressed and which are known to the computer.
- the MAC address is used, which is unique worldwide, if the LAN is based on the so-called Ethernet technology.
- Ethernet technology In Ethernet technology, the data is transported over a common transmission channel. The access to this transmission channel takes place after the collision procedure. This means that every computer that has to send data accesses the common transmission channel if it has been recognized as free by the sending computer.
- the collision method detects and displays the simultaneous access of two computers to the transmission channel. The transmission is repeated by the computers after a predetermined time.
- the data is transmitted in Ethernet technology in so-called datagrams or frames whose length is flexible and in which Frame format the address of the target computer and the address of the sending computer within the local network - ie the MAC addresses of the computer - are entered.
- a valid computer address of the target computer in the local network must be used for the transmission of the data packet of the IP address of the target computer be assigned.
- the data packet is packed into a frame for transmission and the MAC address of the destination computer is entered in this frame.
- the data packet is sent to the target computer.
- the address valid in the local network for the IP address of the target computer is requested by the computer which forwards the data packet via a protocol such as, for example, the Address Resolution Protocol.
- the Address Resolution Protocol, or ARP for short, has the task of determining the format in which computer addresses are available and, if appropriate, converting them from one format to the other.
- the assignments of computer addresses valid on the Internet and valid computer addresses in the local network are stored in an address table.
- the address assignments in this address table are usually provided with a timer, which limits their validity. This means that the address assignments are deleted from the address table after a certain time, which is determined by expiration of the validity timer. Should then sent another data packet to a target computer If the address assignment has been deleted from the address table, the assignment between the valid address of the destination computer in the Internet and the address valid in the local network must be redetermined and stored again in the address table.
- data packets which are to be sent to this target computer during the determination and storage of the address assignment for a target computer are buffered in a buffer.
- this buffer is fully occupied by data packets and therefore no further data packets are received by the buffer, then data packets are lost.
- the quality of the local network also referred to as quality of service, can then no longer be maintained.
- the occurrence of this packet loss is dependent on several factors such as the amount of traffic to the affected target computer at the moment the address assignment becomes invalid and therefore difficult to calculate.
- the invention is therefore based on the object of specifying a method which this type of packet loss when determining and storing the address assignment for a
- Target computer in the address table to prevent and maintain the quality of the local network.
- Address assignment for a target computer is available, whereby losses of data packets are prevented and the quality of the local network is maintained.
- the marked address assignment can furthermore be used for sending data packets to the computer address entered in this address assignment in the local network. This reduces the queue of data packets in the buffer. The buffer is thus not fully occupied with data packets. Therefore, no data packets are lost due to a full buffer.
- Address table is deleted if this address assignment is not requested for the transmission of data packets. On This prevents obsolete address assignments in the address table, which are no longer required for the transmission of data packets, being retained.
- Ethernet technology is used for the realization of the local network. This is particularly because Ethernet technology is widely used in local area networks. In 2000, the share of local networks based on Ethernet technology was estimated at 80%.
- the Address Resolution Protocol is used to determine the address assignment of the computer address in the local network to a computer address valid in the Internet. This is particularly because the Address Resolution Protocol easily converts computer addresses between different addressing protocols.
- FIG. 1 shows a computer R 1 in a local network LN, which also includes further computers R 2, R 3, R 4.
- Rl, R2, R3, R4 are the Internet valid address IPl, IP2, IP3, IP4 and the valid in the local network LN address MACl, MAC2, MAC3, MAC4 of the respective computer Rl, R2, R3, R4 deposited.
- an address table AT is additionally stored, are stored in the address assignments ZOl to ZO3 for the transmission of data packets DP to a computer R2, R3, R4 of the local network LN.
- the address assignment ZOl for example, the on the Internet valid address IP2 of the computer R2 linked to the valid in the local network LN address MAC2 this computer R2. If a data packet DP is now to be sent from the computer R 1 to the computer R 2, the corresponding address assignment ZOL is searched in the address table AT on the basis of the address IP 2 of the computer R 2 valid in the Internet. By the address assignment ZOl valid in the local network LN address MAC2 of the computer R2 is determined to send the data packet DP to the computer R2.
- each address assignment ZO1 to Z03 there is a validity timer GT1 to GT3 in the address table AT. If the validation timer GT1 has expired for the address allocation ZO1, then in a step 1 the address assignment ZO1 is marked with a marker M. The marker M indicates that the address assignment ZOL actually has the status "assignment expired".
- a data packet DP corresponding to the address assignment ZO1 is sent with the status "assignment expired"
- the current MAC address of the target computer R2 valid in the local network LN is requested by the sending computer R 1 in a step 3 by means of the address resolution protocol.
- the computer R2 then sends its address MAC2 valid in the local network LN to the computer R1 in a step 4.
- the determined address MAC2 of the computer R2 valid in the local network LN is entered in the address table AT1 in the address table AT and thus linked to the Internet address IP2 of the computer R2, the marker M in the
- the address assignment ZOl provided with the marker M is deleted from the address table AT.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Small-Scale Networks (AREA)
- Computer And Data Communications (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05789680A EP1794989A1 (de) | 2004-09-30 | 2005-09-28 | Verfahren zur verhinderung von datenpaketverlusten beim aktualisieren einer adresstabelle |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04023271A EP1643726A1 (de) | 2004-09-30 | 2004-09-30 | Verfahren zur Verhinderung von Datenpaketverlusten beim Aktualisieren einer Adresstabelle |
| EP05789680A EP1794989A1 (de) | 2004-09-30 | 2005-09-28 | Verfahren zur verhinderung von datenpaketverlusten beim aktualisieren einer adresstabelle |
| PCT/EP2005/054877 WO2006035043A1 (de) | 2004-09-30 | 2005-09-28 | Verfahren zur verhinderung von datenpaketverlusten beim aktualisieren einer adresstabelle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1794989A1 true EP1794989A1 (de) | 2007-06-13 |
Family
ID=34926788
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04023271A Withdrawn EP1643726A1 (de) | 2004-09-30 | 2004-09-30 | Verfahren zur Verhinderung von Datenpaketverlusten beim Aktualisieren einer Adresstabelle |
| EP05789680A Withdrawn EP1794989A1 (de) | 2004-09-30 | 2005-09-28 | Verfahren zur verhinderung von datenpaketverlusten beim aktualisieren einer adresstabelle |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04023271A Withdrawn EP1643726A1 (de) | 2004-09-30 | 2004-09-30 | Verfahren zur Verhinderung von Datenpaketverlusten beim Aktualisieren einer Adresstabelle |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20070253414A1 (de) |
| EP (2) | EP1643726A1 (de) |
| CN (1) | CN101032153A (de) |
| WO (1) | WO2006035043A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8645524B2 (en) * | 2007-09-10 | 2014-02-04 | Microsoft Corporation | Techniques to allocate virtual network addresses |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6757281B1 (en) * | 1999-12-16 | 2004-06-29 | Xerox Corporation | Route server |
| US6961336B2 (en) * | 2001-03-06 | 2005-11-01 | Watchguard Technologies, Inc. | Contacting a computing device outside a local network |
| WO2004071027A1 (en) * | 2003-01-28 | 2004-08-19 | Tekelec | Methods and systems for non-disruptive physical address resolution |
| US7016328B2 (en) * | 2003-06-24 | 2006-03-21 | Tropos Networks, Inc. | Method for allowing a client to access a wireless system |
| US20060034318A1 (en) * | 2004-07-22 | 2006-02-16 | International Business Machines Corporation | Method and apparatus for waking up client devices |
-
2004
- 2004-09-30 EP EP04023271A patent/EP1643726A1/de not_active Withdrawn
-
2005
- 2005-09-28 WO PCT/EP2005/054877 patent/WO2006035043A1/de not_active Ceased
- 2005-09-28 CN CNA2005800332044A patent/CN101032153A/zh active Pending
- 2005-09-28 US US11/662,676 patent/US20070253414A1/en not_active Abandoned
- 2005-09-28 EP EP05789680A patent/EP1794989A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006035043A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006035043A1 (de) | 2006-04-06 |
| US20070253414A1 (en) | 2007-11-01 |
| CN101032153A (zh) | 2007-09-05 |
| EP1643726A1 (de) | 2006-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE60103942T2 (de) | Lastausgleich in einem Telekommunikationssystem das Mobil IP unterstützt | |
| DE60311297T2 (de) | Gemeinsame port adressenumsetzung in einem router der als nat & nat-pt gateway agiert | |
| DE60028254T2 (de) | Steuerungsgerät und -verfahren für paketbasierte kommunikation | |
| EP1908224B1 (de) | Netzknoteneinheit und verfahren zur weiterleitung von datenpaketen | |
| EP1405540A1 (de) | Verfahren zum durchführen eines qos-orientierten handoffs zwischen einem ersten und einem zweiten ip-basierten, insbesondere mobilen ipv6-basierten kommunikationspfad zwischen einem mobile node (mn) und einem correspondent node (cn) | |
| WO2007104453A1 (de) | Verfahren zur datenkommunikation mit einem bei einem kraftfahrzeug angeordneten kommunikationsteilnehmer mit dynamischer adressvergabe | |
| EP3811570A1 (de) | Verfahren zur konfiguration, verfahren zur bereitstellung von topologie-informationen, verwendung, gerät, computerprogramm und computerlesbares medium | |
| EP1186200B1 (de) | Verfahren und einrichtung zum übermitteln von daten | |
| DE60221538T2 (de) | System und verfahren zum koordinieren von netzereignissen | |
| DE19942465C2 (de) | Verfahren zur Vergabe von IP-Adressen in Kommunikationsnetzen | |
| WO2000052706A2 (de) | Verfahren zum übertragen von ethernet-frames | |
| EP1794989A1 (de) | Verfahren zur verhinderung von datenpaketverlusten beim aktualisieren einer adresstabelle | |
| DE60320567T2 (de) | Adressenverwaltungsverfahren | |
| EP1696637B1 (de) | Verfahren zur Reduktion von Datenpaketverlusten beim Aktualisieren einer Adresstabelle | |
| EP1992127B1 (de) | Kommunikationssystem, rechner und verfahren zum ermitteln eines zu verwendenden kommunikationsprotokolls in einem kommunikationssystem | |
| EP1623559B1 (de) | Verfahren zum datenaustausch zwischen netzelementen in netzwerken mit verschiedenen adressbereichen | |
| EP2171943B1 (de) | Verfahren zum routen von dienstnachrichten | |
| DE10018136A1 (de) | Verfahren zur Übermittlung von Informationen durch Datenpakete und Netzwerk zur Übermittlung von Daten | |
| DE10343796B4 (de) | Verfahren zur Verwaltung einer Gruppe von Netzzugangsservern | |
| DE102013215029B4 (de) | Verfahren zur Datenkommunikation in einem Netzwerk sowie Netzwerk | |
| DE10250201B4 (de) | Verfahren und Vorrichtung zum Austausch von Daten mittels einer Tunnelverbindung | |
| EP2933985A1 (de) | Verwendung von Multicast DNS | |
| EP2493122B1 (de) | IPv6 Quellenadressextrapolation | |
| DE102008012559A1 (de) | Verfahren zur Einrichtung einer Kommunikationsstrecke zwischen Teilnehmergeräten in einem Daten-Netzwerk | |
| EP1240762A2 (de) | Verfahren zum übertragen von datenpaketen mit privaten internetadressen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20061218 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHWANK, KLAUS-PETER Inventor name: SEIFERT, JOACHIM Inventor name: VIERTHALER, RICHARD Inventor name: MEYER, HANNES |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS S.P.A. |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
|
| 17Q | First examination report despatched |
Effective date: 20071126 |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20080408 |