EP1935141A1 - Procede de connexion entre sous-reseaux ip et terminal mobile - Google Patents
Procede de connexion entre sous-reseaux ip et terminal mobileInfo
- Publication number
- EP1935141A1 EP1935141A1 EP06820180A EP06820180A EP1935141A1 EP 1935141 A1 EP1935141 A1 EP 1935141A1 EP 06820180 A EP06820180 A EP 06820180A EP 06820180 A EP06820180 A EP 06820180A EP 1935141 A1 EP1935141 A1 EP 1935141A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mobile terminal
- agent
- message
- external
- access point
- 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- Withdrawn
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/06—Registration at serving network Location Register, VLR or user mobility server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/12—Mobility data transfer between location registers or mobility servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
Definitions
- the invention relates to a method of connection between subnetworks
- IP and mobile terminal via radio access points and access torque to a corresponding IP network.
- the mobile terminal by displacement, changes the radio access point to the IP network, this radio access satisfying for example the IEEE 802.11 recommendations, and in the case where each subnetwork
- IP is associated with a single radio access point, the aforementioned mobile terminal further changes IP subnet.
- the mobile terminal In order to guarantee the continuity of session, the mobile terminal must then carry out two procedures of connection or transfer of connection, "handover" in English, a first transfer of connection at the level of the layer 2, level link or “link layer In English of the OSI model and a second connection transfer at layer 3, network level or "network layer” in English of the OSI model.
- time of transfer of connection at level 2 time of passage from one access point AP to another, implements four successive steps:
- the mobile terminal scans all or part of the 14 channels of the radiofrequency band, 2, 4 GH 2 in the case of the IEEE 802.11 recommendation;
- the mobile terminal chooses the best access point AP in terms of quality of the radio frequency signal received or others, SSID, security (presence of WEP or not, etc.);
- connection transfer time FA_d at level 3 corresponding to the time to change from level 3 of an IP subnet to level 3 of another IP network.
- this time is shown in Figure 1 above. This time results, on the one hand, from the need to allocate a temporary IP address to the mobile terminal via an external agent FA, for "foreign agent” in English (messages A.Sol and A.Adv on Figure 1) and then register the mobile terminal with its temporary IP address with its home site agent HA for "home agent” in English (Req_Reg messages in Figure 1).
- A_R authentication request for Authentication Request in English
- A_S Authentication Success Response for Authentication Success in English
- R_Req reassociation request for Reassociation Request in English
- R_Rep reassociation response for Reassociation Response in English
- A_sol external agent solicitation message for Agent Solicitation in English
- A_adv mobile device information message for Agent Advertisement in English
- Reg_Req registration request for Registration Request in English
- Reg_Rep registration response for Registration Response in English.
- Their succession generates, during a connection or a transfer of connection, the aforementioned delays P_d, D_d, A_d, R_d and FA_d, ie the delay of connection or transfer of connection L2 by message exchange at level 2 OSI between the mobile terminal STA and the access point nAP, increased connection connection delay or L 3 connection transfer by OSI level 3 message exchange between the mobile terminal STA and the external agent FA, and then between the mobile terminal and the original site agent HA, relayed by the external agent FA.
- TAP DANCE protocol makes it possible to provide connection transfer to mobile terminals between IP subnetworks, but also between access points of the same sub-network that satisfies the IEEE 802.11f standard.
- connection transfer times L 2 and L 3 as illustrated in FIG. 1 the client mobile terminal can neither transmit nor receive data.
- the aforementioned connection transfer time exceeds the limit of the delay time allowable for real-time applications such as the transmission of the speech signal on the IP network, also referred Vo IP 1 the aforesaid delay of delay being between 100 and 200 ms, depending on the type of conversation exchanged.
- an object of the present invention is to overcome the aforementioned drawbacks of the prior art, with the aim of minimizing the connection or connection transfer time between IP subnetworks and to cause as little data packet loss as possible.
- an object of the present invention is from a grouping in one pair of the functionalities of an access point AP at level 2 and those of an external agent FA of the Mobile! Pv4 protocols at level 3 , each element of the pair operating at level 2, for the access point part AP, respectively at level 3, for the external agent part FA, to optimize connection time or connection transfer, unlike existing equipment currently integrating these features but for which connection times are close to time obtained with AP access point equipment, separate FA external agent.
- an object of the present invention is to improve the connection transfer time from one IPv4 subnet to another IPv4 subnet, when each of these subnetworks is associated with a single access point.
- IEEE 802.11 AP including 802.11b, 802.11g,
- Level 2 connection transfer procedures corresponding to the IEEE 802.11 standard
- Level 3 connection transfer procedures corresponding to the existing Mobile IPv4 standard
- Another object of the present invention is also the application of the aforementioned method, within the framework of an architecture implementing the ADSL accesses of private mobile terminal users, coupled to radio access points, each point of access. access corresponding to a different IPv4 subnet.
- Another object of the present invention is also the application of the aforementioned method, in the context of an architecture implementing a plurality of access points, belonging to a wireless local area network, WLAN, each of the points. radio access corresponding to a different IPv4 subnet.
- each radio access point is locally associated with an external IP agent to form an access pair, following the execution of a radio access point search step by this mobile terminal.
- this method comprises at least the transmission of each pair of access to the mobile terminal of an intelligence message comprising at least the IP address of the external agent of the pair of access, and, following a decision process of choice of the access couple access point by this mobile terminal and a successful and committed authentication procedure between the mobile terminal and the radio access point of the mobile terminal.
- the method which is the subject of the invention is furthermore remarkable in that it consists in anticipating the transmission of the request message recording the external IP agent of the chosen access couple to the agent of the site of origin of the mobile terminal prior to the transmission by the mobile terminal of the reassociation request.
- the pair of access to an IP network from a mobile terminal by radio link comprises a radio access point and an external IP agent locally associated with this radio access point.
- this access pair includes at least one creation and transmission module to any mobile terminal requesting a message. of information, comprising at least the IP address of this external IP agent, and a management module by inhibiting the transmission by the radio access point of this access pair of any association response message to a terminal mobile, and, consequently, of inhibition by any requesting mobile terminal of the transmission of any message at the OSI level 3 to any external IP agent, in particular to the external IP agent associated locally with this radio access point forming this access couple.
- the access torque to an IP network from the mobile terminal by radio link which is the subject of the invention, is also remarkable in that it furthermore includes a module for creating and transmitting the external IP agent of this invention. access torque to the originating site agent of a requesting mobile terminal of a registration request message and a creation and transmission module of the external IP agent to that requesting mobile terminal of a association response message between the radio access point of this access pair and the requesting mobile terminal.
- a link resource WiFi type radio IEEE 802.11
- an access pair equipped with a corresponding radio access point associated locally with an IP agent of any type including an ADSL modem, a router connected to the INTERNET via a LAN enterprise network for example.
- FIG. 2 represents, by way of illustration, a timing diagram of implementation of the method that is the subject of the invention in a first nonlimiting implementation mode
- FIG. 3 represents, by way of illustration, a time diagram of the implementation steps of the method that is the subject of the invention in a second nonlimiting implementation mode
- FIG. 4 represents, by way of illustration, a block diagram of an access torque to an IP network from a mobile terminal by radio link, object of the invention
- FIG. 5a represents, by way of illustration, a first example of use of the method and of an access couple that is the subject of the invention
- FIG. 5b represents, by way of illustration, a second example of use of the method and of an access couple which is the subject of the invention.
- a mobile station STA constituted by a portable computer equipped with a radio link equipment of the WiFi type, for example, and therefore capable of connecting to an IP subnet via of an AP access point among a plurality of nAP access points, where appropriate to a plurality of corresponding external IP agents, is likely to connect for the first time to one of the aforementioned IP subnetworks or successively during a roaming route of this mobile terminal among the IP sub-networks thus formed.
- each radio access point AP is locally associated with an external IP agent FA to form an access pair, each access pair being noted ⁇ AP + FA ⁇ among a plurality of access pairs denoted n ⁇ AP + FA ⁇ .
- the mobile terminal STA performs a step of searching AP radio access points, a step in which the AP radio access point of each pair of access n ⁇ AP + FA ⁇ transmits to the mobile radio terminal a search response message in a conventional manner.
- the mobile terminal STA transmits a radio access point search message P_Req and receives a search response message P_Rep to one or more of the radio access points and finally available access pairs AP + FA ⁇ .
- the method which is the subject of the invention includes at least the transmission of each access pair ⁇ AP + FA ⁇ of the plurality of access pairs n ⁇ AP + FA ⁇ to the mobile terminal STA, and following the reception of the radio access point search message and then of the transmission of the search response message, of an intelligence message marked P_A comprising at least the IP address of the IP agent External AF of the corresponding access pair ⁇ AP + FA ⁇ .
- search time D_d is not significantly increased since it simply corresponds to the additional transmission of the information message P_A for each access couple likely to respond to the search message of the points of interest. radio access.
- this decision process can be conducted conventionally, then following an authentication procedure consisting for example, as shown in FIG. 2, when the mobile terminal STA sends an authentication request A_R and then receives from the data point considered AP access chosen by the STA mobile terminal a A_S authentication success message, the authentication procedure being engaged and successful between the mobile terminal STA and the radio access point of the chosen access couple ⁇ AP + FA ⁇ , the method, object of the invention, then consists in performing an inhibition of the transmission by the radio access point of the access couple chosen following the reception by the radio access point by the access point AP considered of an association request respectively of reassociation, denoted R_Req, of any association response message respectively reassociation to the mobile terminal and, consequently, by the terminal STA considered, of any OSI level 3 message to an external IP agent and in particular to the agent External IP FA of the access pair ⁇ AP + FA ⁇ chosen.
- the method according to the invention comprises, as represented in the above-mentioned figure, after the authentication period D_d of the authentication procedure, the transmission by the mobile terminal STA of the association request in the case of a first connection, respectively of a reassociation message in the case of a connection transfer of the association request denoted R_req and then, immediately and without any further delay, the selective transmission of the mobile terminal STA to the access port access point of an association registration request marked R_Reg to the selected access pair ⁇ AP + FA ⁇ .
- the association registration request R_Reg contains the registration information of the mobile terminal STA with the agent of the home site HA of the mobile terminal in question. .
- any mobile terminal STA capable of executing itinerant operations is managed from the point of view of its addressing, in particular for the transmission of messages in a local network, from an identifier and an originating address assigned by the originating site agent HA of the mobile terminal.
- the IP agent external can then, in accordance with a remarkable aspect of the method of the invention, proceed to the transmission of a registration request Reg_Req to the agent of the original site HA of the mobile terminal STA to which a temporary address has been assigned .
- the external IP agent FA of the selected access couple On receipt by the external IP agent FA of the selected access couple
- the method which is the subject of the invention then consists in transmitting the external IP agent FA of the selected access pair to the mobile terminal STA, an association response message R_Rep between the AP radio access point of the selected access pair ⁇ AP + FA ⁇ and the requesting connection or reconnection mobile terminal STA.
- the operating mode described in connection with FIG. 2 relating to the implementation of the method, object of the invention thus makes it possible to optimize the total connection time by eliminating the transmission and response delay of any message at level 3 OSI to an external IP agent not located a priori. Indeed, because of the local association of an external IP agent FA to an AP access point to the same address to form an access couple, the method of the invention thus reduces the delay of Reassociating and recording R_R_d in Figure 2 to transactions between mobile terminal STA and access couple ⁇ AP + FA ⁇ , and access torque above to the HA agent of the original site of the mobile terminal STA by transmission of OSI level 2 messages, as will be described later in the description.
- connection or connection transfer delays are obtained by suppressing the transmission of OSI level 3 messages by integration into OSI level 2 messages of essential information previously transmitted in the interior art by OSI level 3 messages between mobile station and external IP agent.
- the method, which is the subject of the invention is remarkable in that the deleted messages are in particular messages of the prior art represented in FIG.
- the radio access devices of the prior art being constituted either by simple access points AP radio not associated locally with an external IP agent FA, or on the contrary by an access pair formed by an AP radio access point and an external IP agent FA associated locally, but for which the conventional protocol, as defined in FIG. relative to the prior art, is not modified, however the transmission of OSI level 3 messages is executed.
- agent information message A.Adv is also deleted, this message being none other than the response message of the external agent FA associated or not locally with the points.
- AP access in the prior art, transmitted to the mobile station STA.
- A.Sol This is an ICMP message for the Internet Contrai Message Protocol, sent by the broadcast mobile terminal to find an external IP agent FA in its IPv4 subnet. Such a message is then not necessary when the access pair ⁇ AP + FA ⁇ is available since, as soon as the mobile terminal STA associates with the access point AP, the external IP agent FA locally associated with the latter is immediately located. The agent solicitation message A.Sol is therefore removed.
- This message is also an ICMP message sent by the external IP agent broadcast in the aforementioned IPv4 subnet.
- the IPv4 subnet is a BSS subnet for the Basic Service Set in English, that is to say radio link, operated by an AP radio access point.
- the purpose of the agent intelligence message is to inform the machines, i.e. the mobile terminals that have connected to the IPv4 subnet of the presence of the external IP agent FA and to set them to provision of several temporary IP addresses, these addresses being designated CoA addresses for Care of Adress in English.
- the structure of the A.Adv agent information message is introduced below in Table I.
- the router address RA IPv4 address of the external IP agent FA, coded on 32 bits;
- the agent information message A.Adv can then be reduced to the three preceding essential fields and sent by an OSI level 2 message or frame after the search response message R_Rep, as previously described in the description. It is recalled that the aforementioned search response message is a broadcast message of the AP access point in a BSS, in the same way that the authentication success message A_S is a broadcast message of the external IP agent FA in its IPv4 subnet.
- the aforementioned information message P_A advantageously also has the maximum lifetime of the recording procedure accepted by the external IP agent FA and the list of new temporary addresses [CoA] available.
- This message is an OSI level 2 management frame in the format of the IEEE 802.11 standard shown in Table II below, among the combinations that remain free in Table III below.
- the previous Table II represents the format of the control frame of the IEEE 802.11 standard.
- Frame Control field designated "Frame Control” represents the format shown in Table II.
- the other formats are specific to the management frame.
- the entire field designated Framebody for Frame Body in Table IV mentioned above is 0 to 2312 bytes to include the three fields of the information message P_A.
- the registration request message Reg_Req and the registration response message Reg_Rep make it possible to execute the transaction between the external agent FA and the agent HA. from the original site of the STA mobile terminal are built according to the UDP / IP protocol.
- This message is created by the mobile terminal STA and directed to the agent of the original site HA so that the mobile terminal can register with the latter.
- H_ad for "Home address” IPv4 address on site of the mobile station that is to say that allocated by the agent of the origin site HA encoded on 32 bits;
- IPv4 address chosen from the list of addresses by the external IP agent FA via the information message P_A and coded on 32 bits.
- the aforementioned fields can then be included in a management frame according to the IEEE 802.11 standard among the combinations which remain free as previously described in connection with Table III, and then be sent via the association registration request. or reassociation R_Reg without additional delay.
- the reassociation request and then the association registration message R_Req and R_Reg message containing the registration information are transmitted to the agent of the original site HA, that is to say that the four fields previously described included in the "Framebody" frame body of Table IV are transmitted by the R_Req message, which is immediately followed by the R_Reg registration request message without waiting for a DIFS and SIFS time specific to the MAC layer of the IEEE 802.11 standard. .
- the aforementioned messages are then preferably transmitted glued to each other to reduce connection time or connection transfer.
- the registration request message R_Req is then generated from the information of the R_Reg message association registration or reassociation request according to the structure described in connection with the table. Vl previously mentioned.
- the identification ID field consisting of a number created by the access pair ⁇ AP + FA ⁇ , this field making it possible to match according to a one-to-one relationship.
- the registration request R_Reg and, on the other hand, the registration response Reg_Rep.
- the identification number ID shown in Table VI is advantageously coded su 24 bits:
- the registration response, Reg_Rep This response is a message sent by the agent of the originating site HA of the mobile terminal STA to indicate whether a record is valid or not.
- this message is received by the external IP agent FA, which updates its data tables and retransmits the latter to the mobile terminal STA.
- the only useful information of this message is the validity or invalidity of the registration.
- the access pair ⁇ AP + FA ⁇ checks whether the recording is valid or not. Based on this verification information, upon positive verification, the external IP agent FA of the aforementioned access pair conditionally transmits the reassociation response message R_Rep indicating the success or failure of the reassociation. Under these conditions, by associating a single frame at OSI level 2 constituting the reassociation response message, a connection or a connection transfer is validated or not.
- the mobile terminal STA can then attempt a new registration by returning two messages, in particular a reassociation request R_Req and an association registration request R_Reg, and as previously described in connection with Figure 2.
- the size of the transmitted messages is reduced because the essential messages are integrated at level 2 OSI, the messages A.Adv and the message of the registration request are replaced by the message P_A and by the association registration request R_Reg respectively.
- any mobile terminal equipped with such a conventional card being able to continue to communicate normally with an access pair ⁇ AP + FA ⁇ allowing the implementation of the method of the present invention
- any access couple ⁇ AP + FA ⁇ of the prior art existing on the market can however communicate with any IEEE 802.11 card fitted to a mobile station and allowing the implementation of the method object of the previous invention.
- the aforementioned preferred embodiment makes it possible to trigger the recording of a mobile terminal STA from its original site agent HA just after the authentication of the mobile terminal, in the case where each IPv4 subnet consists of a single WiFi access point.
- the recording is anticipated and performed in parallel at the end of the level 2 connection or the level 2 connection transfer, that is to say the reassociation with a new access point AP of a separate access couple.
- the authentication procedure used in this embodiment can, in a non-limitative manner, be constituted by the WEP procedure for Wire Equivalent Privacy in English. This is a specific operating mode for authenticating the mobile terminal STA. Other authentication procedures may be implemented in a non-limiting manner.
- this procedure requires the sending of four messages, an authentication request message A_R transmitted from the mobile terminal STA to the selected access couple ⁇ AP + FA ⁇ , the registration message of association or reassociation R_Reg then being transmitted immediately after the authentication request A_R.
- the access pair ⁇ AP + FA ⁇ responds to the mobile terminal by transmitting an authentication challenge message A_C to the mobile terminal STA and the latter performing the necessary cryptographic calculations transmits to the chosen access couple ⁇ AP + FA ⁇ an authentication response message A_Rep, which allows the aforementioned access torque to verify the authentication calculation performed by the mobile terminal STA.
- the access pair ⁇ AP + FA ⁇ can then proceed with the transmission of the registration request message RegJReq to the agent of the home site HA of the STA mobile terminal, this transmission can then be made conditional on the successful authentication procedure of the mobile terminal STA near the radio access point AP and the access couple ⁇ AP + FA ⁇ .
- the method which is the subject of the invention, implemented as represented in FIG. 3 then consists in transmitting, of the chosen access couple (AP + FA ⁇ , an authentication success message
- the method in the embodiment of FIG. 3 in accordance with the subject of the invention consists of transmitting the reassociation registration message R_Req from the mobile terminal STA to the radio access point AP of the selected access pair ⁇ AP + FA ⁇ as soon as the successful authentication procedure is started.
- This message is therefore transmitted just after the authentication request message A_R without waiting for a time DIFS or SIFS, time specific to the CSMA / CD of the IEEE 802.11 standard.
- the two messages A_R authentication request and registration request R_Reg are then pasted together to reduce connection time or connection transfer.
- the access pair ⁇ AP + FA ⁇ after receiving the two aforementioned messages, then begins to prepare a registration request message that is to say the message Reg_Req, MIPv4 type message, but does not transmit the latter to the original site agent HA of the mob ⁇ e terminal
- the authentication procedure is a conventional WEP procedure
- the selected access pair ⁇ AP + FA ⁇ verifies the identity of the mobile terminal and sends the registration request Reg_Req immediately afterwards.
- the mobile terminal STA receives the authentication success message A_S and then transmits in response the reassociation request R_Req to the radio access point AP of the chosen access pair ⁇ AP + FA ⁇ .
- the originating site agent HA of the terminal STA receives the registration request Reg_Req and transmits the registration response message Reg_Rep back.
- the latter Upon receipt of the latter by the selected access couple ⁇ AP + FA ⁇ , the latter transmits the association or reassociation response message R_Rep which terminates the connection procedure or global connection transfer.
- the mode of implementation of the method which is the subject of the invention in a preferential manner as illustrated in FIG. 3 makes it possible to obtain a connection or global connection transfer time designated L 2 + L 3 transfer which is further reduced.
- the registration request message R_Reg is sent during authentication so that the registration with the originating site HA of the requesting mobile terminal STA is executed as soon as the aforementioned mobile terminal is authenticated. It is understood, of course, that the recording can not be started before a successful authentication.
- the association registration or reassociation message R_Reg is sent immediately after the message authentication request transmission A_R;
- the registration request message Reg_Req must be created but transmitted only after verification of the identity of the mobile terminal STA;
- the access pair ⁇ AP + FA ⁇ object of the invention comprises an AP radio access point and an external IP agent FA, locally associated with the aforementioned radio access point. It is furthermore remarkable that, in addition to an I / O input / output device connected to the IP network and a CPU, to which a RAM memory is associated, it comprises at least one module M1 for creating and transmitting to any requesting mobile terminal an intelligence message such as the P_A message previously described in the description with FIGS. 2 and 3.
- this information message comprises at least the IP address of the external IP agent FA constituting the access pair ⁇ AP + FA ⁇ chosen.
- FIG. 4 it also comprises a management module for inhibiting the transmission by the radio access point of the radio access torque AP of the access pair ⁇ AP + FA ⁇ of any message of association response to a requesting mobile terminal and, therefore, inhibition by any requesting mobile terminal of the transmission of any OSI level 3 message to any external IP agent, such as the external IP agent FA locally associated with the point AP radio access forming the access couple ⁇ AP + FA ⁇ considered.
- a management module for inhibiting the transmission by the radio access point of the radio access torque AP of the access pair ⁇ AP + FA ⁇ of any message of association response to a requesting mobile terminal and, therefore, inhibition by any requesting mobile terminal of the transmission of any OSI level 3 message to any external IP agent, such as the external IP agent FA locally associated with the point AP radio access forming the access couple ⁇ AP + FA ⁇ considered.
- the access couple comprises well heard a transceiver and a radiating element according to the WiFi standard, for example, which can be driven advantageously from the central processing unit CPU RAM working memory and of course modules M1 and M2 above.
- the access torque object of the invention advantageously comprises a module M3 for creating and transmitting the external IP agent FA of the access pair ⁇ AP + FA ⁇ to the originating site agent HA of the requesting mobile terminal STA of a registration request message the message Reg_Req.
- an M4 module is provided, this module executing the creation and transmission of the external IP agent to the requesting mobile terminal STA of an association response message, that is to say the R_Rep message represented in FIG. 2 or in FIG. 3.
- the reassociation concerns the AP access radio access point AP (AP + FA) and the requesting mobile terminal STA. It will of course be understood that the transmission of the aforementioned message is carried out via the transceiver T / R and the radiating element of the access point AP.
- modules M1, M2, M3 and M4 advantageously consist of separate software modules integrated into a common software.
- the access torque object of the invention may be equipped with a nonvolatile programmable memory for example, denoted PM, which is intended to receive the modules M1, M2, M3 and M4.
- nonvolatile programmable memory appears useful insofar as the aforementioned software modules can be downloaded directly on each access pair ⁇ AP + FA ⁇ considered for updating, updating, or even changing a couple of d access ⁇ AP + FA ⁇ of the prior art in which the only update software and aforementioned modules constituting the latter then allows the transition from a conventional connection or reconnection process to a connection method or connection transfer according to the object of the present invention.
- connection method that is the subject of the present invention, as described above, and of the use of an access torque to an IP network from a mobile terminal by radio link, as described above with reference to FIG. 4, will now be given in connection with FIG. 5a and then FIG. 5b.
- each ADSL modem constituting the external IP agent with which an AP radio access point is associated.
- Each radio access point is associated with a separate IP subnet. This allows a mobile terminal STA, during roaming, to connect successively to one or other of the distinct IP subnets with an optimized connection time or connection transfer.
- each ADSL modem as shown in FIG. 5a is connected to the INTERNET network for example via a device to a DSLAM module for DSL Access Modul in English and to a designated broadband access server.
- BAS for Broadband Access Server, all managed by a DHCP server for Dynamic Host Configuration Protocol in English.
- connection method which is the subject of the invention as described with reference to FIGS. 2 and 3, and of a pair of accesses to an IP network from a mobile terminal by radio link conforming to FIG.
- the subject of the present invention as described with reference to FIG. 4, will now be described with reference to FIG. 5b.
- the access pair is formed by a router RO connected to a LAN of the LAN corporate network type and to the INTERNET for example by a plurality of radio access points denoted AP1, AP2, to APn.
- Each aforementioned radio access point corresponds to a separate subnet! P. This allows a mobile terminal STA to connect successively to one or the other of the distinct IP subnetworks with an optimized connection and connection transfer time as described. previously in the description.
- the present invention finally relates to a computer program product recorded on a storage medium for execution by a computer or by a dedicated device comprising at least one central processing unit.
- the computer program product is remarkable in that it comprises a sequence of instructions for executing the method that is the subject of the invention as described above with FIG. 2 or FIG.
- the aforementioned computer program product is also remarkable in that it is stored in modular form, for example in the form of modules M1, M2, M3 and M4 in a support integrated in an access couple (AP + FA ⁇ as previously described in connection with Figure 4.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0510455 | 2005-10-13 | ||
| PCT/FR2006/002274 WO2007042663A1 (fr) | 2005-10-13 | 2006-10-10 | Procede de connexion entre sous-reseaux ip et terminal mobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1935141A1 true EP1935141A1 (fr) | 2008-06-25 |
Family
ID=36600124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06820180A Withdrawn EP1935141A1 (fr) | 2005-10-13 | 2006-10-10 | Procede de connexion entre sous-reseaux ip et terminal mobile |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1935141A1 (fr) |
| WO (1) | WO2007042663A1 (fr) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100547153B1 (ko) * | 2003-10-30 | 2006-01-26 | 삼성전자주식회사 | 고속으로 링크 계층 및 네트워크 계층에 접속하는 장치 및방법 |
-
2006
- 2006-10-10 EP EP06820180A patent/EP1935141A1/fr not_active Withdrawn
- 2006-10-10 WO PCT/FR2006/002274 patent/WO2007042663A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007042663A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007042663A1 (fr) | 2007-04-19 |
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