WO2006070311A1 - Procede de production d'une adresse valide dans un reseau local - Google Patents

Procede de production d'une adresse valide dans un reseau local Download PDF

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Publication number
WO2006070311A1
WO2006070311A1 PCT/IB2005/054308 IB2005054308W WO2006070311A1 WO 2006070311 A1 WO2006070311 A1 WO 2006070311A1 IB 2005054308 W IB2005054308 W IB 2005054308W WO 2006070311 A1 WO2006070311 A1 WO 2006070311A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
address
node
valid address
local area
Prior art date
Application number
PCT/IB2005/054308
Other languages
English (en)
Inventor
Jean-Pierre Morard
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2006070311A1 publication Critical patent/WO2006070311A1/fr

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Classifications

    • 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
    • H04L61/50—Address allocation
    • H04L61/5046—Resolving address allocation conflicts; Testing of addresses
    • 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
    • H04L61/50—Address allocation
    • H04L61/5092—Address allocation by self-assignment, e.g. picking addresses at random and testing if they are already in use

Definitions

  • the present invention relates to a method of generating a valid address to communicate with a new node in a local area network.
  • the invention also relates to a local area network arrangement comprising an existing node or server and a new node or client to be connected to the local area network via the server and to said server and client device of said local area network.
  • the invention applies in particular to local area networks (LANs) such as home networks.
  • LANs local area networks
  • United States patent published under number 6,532,217 describes a system for automatically determining a network address.
  • a new node starting on the network will solicit addresses from other nodes on the subnet.
  • the addresses received are stored in a database to be reviewed in order to determine a subnet mask.
  • the new node will choose a host number, based on the subnet mask that is unique among the addresses in the database.
  • the chosen unique host number is combined with the subnet number to form the new node's network address.
  • the invention takes the following aspects into consideration.
  • the system for automatically determining a network address described in the cited prior art requires to implement a sophisticated procedure and to allocate sufficient resource in the new node so that it is able to solicit one or more addresses from one or more existing nodes of the network and to determine a unique valid address among all solicited addresses, including listening for responses from the solicited nodes, storing the network addresses received in the responses and checking availability of the addresses.
  • the invention proposes a method, such as mentioned in the opening paragraph, comprising the steps of : - determining a valid address from an existing node of the network, which address being derived from the address of said existing node, - broadcasting said valid address through the network.
  • the determination of the valid address is performed from the existing node, which already knows its address in the network and can derive a new node's address from its own IP (Internet Protocol) address.
  • IP Internet Protocol
  • the new node acting as a client will receive a valid address only if the existing node that can be, for example, a personal computer acting as an address server, is running, which must be the case when, for example, the new node connection is required for the new node to access a server resource on the same device as the address server. This represents the most frequent use case in a home network environment.
  • Fig. 1 is a bloc diagram to illustrate a local area network arrangement according to the invention.
  • Fig. 2 is a flow chart to illustrate a method of generating a valid address according to the invention.
  • Fig. 3 is a block diagram depicting an example of a message format containing a valid address to be broadcast in the method according to the invention.
  • Fig. 1 represents a local area network 10 comprising an existing node 11 and a new node 12.
  • the local area network 10 can be, for example, a home network based on a TCP/IP like Internet communication protocol.
  • the existing node 11 can be, for example, a home computer acting as a server device in the home network and the new node 12, an Ethernet appliance being a network-computing device such as a set top box, which needs to connect to the home server to use the server resources. For this the set top box needs to get IP network parameters (an IP address) to be able to communicate with the network.
  • IP network parameters an IP address
  • Fig. 2 illustrates a client/server method according to the invention of generating a valid address to communicate with a new node in a local area network such as the one shown in Fig. 1.
  • the basic steps of the protocol are mainly implemented in the existing node of the network, acting as an IP address server, to enable the new node, acting as a client of the network server, to communicate with the network.
  • the method comprises :
  • the steps of determining a valid address from the existing node comprise :
  • the steps of broadcasting the valid address through the network comprises two preliminary steps :
  • step 25 of receiving an identifier or ID number uniquely identifying the new node in the sub network - a step 26 of attaching said first available valid address to the ID number of the new node before broadcasting the valid address towards the new node,
  • the home computer 11 comprises appropriate means for determining a valid address from said existing node of the network including :
  • steps 21, 22 means to calculate (steps 21, 22) a possible valid address from its own IP address using, for example, the same subnet mask as its own mask,
  • step 23 means to check (step 23) availability of said potentially valid address in the sub network, using for example the ARP (Address Resolution Protocol) protocol and
  • step 24 means for selecting (step 24) the first available valid address checked on the network.
  • the server can chose randomly an address in the same network mask as its Ethernet card and send an ARP packet to check if this address is already used.
  • the home computer 11 also comprises appropriate means for broadcasting said valid address through the network to the new node, including :
  • step 25 means for receiving (step 25) an ID number uniquely identifying the new client node
  • step 26 means for attaching (step 26) the first available valid address to the ID number of the new node and for broadcasting the valid address attached to the ID number in a message though the network.
  • Fig. 3 shows the content of an UDP (User Datagram Protocol) packet message to be broadcast by the server in the network and destined to the new node or client device.
  • UDP User Datagram Protocol
  • Each node or device on the local network has a unique identifier, called ID number. It can be a MAC (Media Access Control) address or any other identifier that is unique for each device connected on the local network.
  • the device has two modes of operation : an operating mode and a network setting mode.
  • the network configuration of the device is already done, meaning the node already has an IP address on the network enabling the device to communicate on the network.
  • the device When the device is running, if a network error occurs then the device will move to a network setting mode. A user operation can also force the system to move the device in a network-setting mode.
  • the device In the network setting mode, the device needs to get an (new) IP configuration (IP address) to properly communicate in the network.
  • IP address IP address
  • the device will listen to UDP packets on a particular port POR. If a packet containing its identifier and an IP configuration is received the device has to update its configuration according to the information received in the UPD packet.
  • the user may, for example, manually enter an identifier of the client (ID number) to be configured.
  • ID number the server will compute a valid IP address on the network and broadcast an UDP packet containing the identifier of the Ethernet device, the IP to be set, and some extra information required by the appliance to operate on the network.
  • the content of an example of an UDP packet is shown in Fig. 3. It comprises an UDP header and UDP data.
  • the message can be broadcast on user request or periodically.
  • the invention advantageously applies to any piece of equipment that needs to be connected to a home network. It is all the more advantageous for unsophisticated equipment having reduced storage capacity.
  • the invention applies to a resident firmware loader for a network-computing device.
  • Such loader is a storage device for storing a computer program to operate a network-computing device.
  • the computer program therefore comprises instructions for enabling said network-computing device to start a communication with the local area network, according to the invention, including : - identifying data to identify said network-computing device uniquely in the sub network, - detecting a valid address attached with said identifying data broadcast from the existing node.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Computer And Data Communications (AREA)

Abstract

La présente invention concerne un procédé permettant de produire une adresse valide pour communiquer avec un nouveau noeud dans un réseau local. L'adresse valide est déterminée à partir d'un noeud existant du réseau qui connaît déjà son adresse dans le réseau et qui peut dériver une nouvelle adresse de noeud à partir de sa propre adresse IP (protocole Internet).
PCT/IB2005/054308 2004-12-30 2005-12-19 Procede de production d'une adresse valide dans un reseau local WO2006070311A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04300957.0 2004-12-30
EP04300957 2004-12-30

Publications (1)

Publication Number Publication Date
WO2006070311A1 true WO2006070311A1 (fr) 2006-07-06

Family

ID=36405200

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/054308 WO2006070311A1 (fr) 2004-12-30 2005-12-19 Procede de production d'une adresse valide dans un reseau local

Country Status (1)

Country Link
WO (1) WO2006070311A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112019653A (zh) * 2020-09-09 2020-12-01 迈普通信技术股份有限公司 接入交换机、ip地址部署方法、装置及可读存储介质

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1202493A2 (fr) * 2000-10-31 2002-05-02 Hewlett-Packard Company Configuration-ami et procédé correspondant pour des noeuds d' un réseau

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1202493A2 (fr) * 2000-10-31 2002-05-02 Hewlett-Packard Company Configuration-ami et procédé correspondant pour des noeuds d' un réseau

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FAN Z: "IPv6 Stateless Address Autoconfiguration in Ad Hoc Networks", LECTURE NOTES IN COMPUTER SCIENCE, SPRINGER VERLAG, NEW YORK, NY, US, vol. 2775, 25 September 2003 (2003-09-25), pages 665 - 678, XP002283701, ISSN: 0302-9743 *
NESARGI S ET AL: "MANETconf: configuration of hosts in a mobile ad hoc network", PROCEEDINGS IEEE INFOCOM 2002. THE CONFERENCE ON COMPUTER COMMUNICATIONS. 21ST. ANNUAL JOINT CONFERENCE OF THE IEEE COMPUTER ANDCOMMUNICATIONS SOCIETIES. NEW YORK, NY, JUNE 23 - 27, 2002, PROCEEDINGS IEEE INFOCOM. THE CONFERENCE ON COMPUTER COMMUNICA, vol. VOL. 1 OF 3. CONF. 21, 23 June 2002 (2002-06-23), pages 1059 - 1068, XP010593670, ISBN: 0-7803-7476-2 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112019653A (zh) * 2020-09-09 2020-12-01 迈普通信技术股份有限公司 接入交换机、ip地址部署方法、装置及可读存储介质

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