CN101374156A - Mobile communication terminal, communication device, mobile communication method and communication method - Google Patents
Mobile communication terminal, communication device, mobile communication method and communication method Download PDFInfo
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- CN101374156A CN101374156A CNA2008102130023A CN200810213002A CN101374156A CN 101374156 A CN101374156 A CN 101374156A CN A2008102130023 A CNA2008102130023 A CN A2008102130023A CN 200810213002 A CN200810213002 A CN 200810213002A CN 101374156 A CN101374156 A CN 101374156A
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Abstract
The invention provides a mobile communication terminal, a communication device, a mobile communication method and a communication method. An object of the present invention is to make it possible to appropriately maintain PPP-based communications even in an environment in which the terminal moves and the communication environment continually changes. A mobile communication terminal (10) comprises a plurality of wireless accessing means (11, 12 and 13) for establishing PPP-based communication links for respectively different modes of wireless communications with a fixed communication apparatus (20), which is a communication partner; a PPP device (14) for combining the established communication links; and a valid wireless LAN searching portion (16) for detecting that wireless communication is possible for a wireless LAN adapter (12). The PPP device (14) executes control so as to establish communication links for the wireless LAN adapter (12) detected as being capable of wireless communication, and for a L2TP virtual device (13).
Description
Technical field
The present invention relates to and communication counterpart between set up based on PPP (Point-to-Point Protocol: the mobile communication terminal of communication link point-to-point protocol), communicator, method of mobile communication and communication means.
Background technology
Among the communication technology of using a plurality of communication path transceive data bags, have and support to follow IP (Internet Protocol: procotol) the IP mobile technology of the route diversion of the change of address.As the representative agreement of IP mobile technology, has Mobile IP (referring to IETF RFC3344 " IPMobility Support for IPv4 " (non-patent literature 1)).Mobile IP supports ambulant technology in network layer, and communication terminal carries out the Notification of Changes of IP address to local agent, and communicates via local agent and communication counterpart.Change by this IP address is handled, and produces the cut-out or the instantaneous interruption of communication sometimes.
In addition, also there is the method that is known as MultiLink PPP (referring to IETF RFC1717 " The PPP Multilink Protocol (MP) " (non-patent literature 2)) that a plurality of communication links is concentrated into a communication link.Among MultiLink PPP, can regard 1 communication path as from layers such as IP 3 agreements, even thereby switched the change that communication path also can not be accompanied by the IP address.If use this MultiLink PPP then can use a plurality of communication links by a communication path in the mode of IP.But MultiLink PPP is usually designed to be used in concentrates a plurality of slow communication links to set up high-speed link, thereby it is to be prerequisite with the constant mass of all communication links etc.
In addition, also proposed to expand the method (referring to Japan Patent open communique is spy open 2000-216815 communique (patent documentation 1) and spy open 2007-60494 communique (patent documentation 2)) of this MultiLink PPP with the controlled function of packet distribution in the communication link that is increased in the different communication quality.If use these methods, then can concentrate the communication link of different communication quality, send packet efficiently.
The purpose of above-mentioned MultiLink PPP is to realize the broadband of communication path, rather than the handover between Radio Link is provided.That is, among said method, be not formed in and append new valid wireless link and the structure that can remove invalid Radio Link in the communication.Thus, according to said method, may among the environment that changes at any time along with the terminal mobile communication environment, can't suitably continue communication based on PPP.
Summary of the invention
The present invention finishes in order to overcome the above problems a little, even it is a kind of under the environment that changes at any time along with the terminal mobile communication environment that its purpose is to provide, also can suitably proceed mobile communication terminal, communicator, method of mobile communication and communication means based on the communication of PPP.
To achieve these goals, the feature of the mobile communication terminal that the present invention relates to is to have: a plurality of accessing wirelesslies unit, its with communication counterpart between set up the communication link based on PPP of the radio communication that mode is different separately; Centralized unit, it concentrates the communication link of being set up by a plurality of accessing wirelesslies unit; Detecting unit, it can carry out the accessing wirelessly unit of radio communication at least one detection in a plurality of accessing wirelesslies unit; And control unit, but it is controlled to set up communication link the accessing wirelessly unit that is detected radio communication by detecting unit.
In the mobile communication terminal that the present invention relates to, by a plurality of accessing wirelesslies unit, with communication counterpart between set up the communication link based on PPP of the radio communication that mode is different separately, and concentrate the communication link of being set up.Can between mobile communication terminal that the present invention relates to and communication counterpart, carry out thus of the communication of a plurality of communication links as a communication path.In addition, but to the situation of at least one the detection radio communication in the accessing wirelessly unit that carries out the radio communication that mode is different separately, set up communication link by detected accessing wirelessly unit.Thereby can concentrate at any time effectively communication link according to the mobile communication terminal that the present invention relates to,, also can suitably continue communication based on PPP even therefore under the environment that changes at any time along with the terminal mobile communication environment.
It is desirable in the accessing wirelessly unit one and obtain the IP address, use this IP address and communication counterpart between set up the L2 tunnel, set up communication link via this L2 tunnel.According to this structure, even can't and communication counterpart between directly set up situation based on the communication link of PPP, also can set up communication link.The tediously long property of communication link can be improved thus, communication can be more suitably continued.
It is desirable to detecting unit and detect the communication link of being set up by this accessing wirelessly unit in a plurality of accessing wirelesslies unit at least one and become invalidly, centralized unit is removed to detect by detecting unit becomes invalid communication link.According to this structure, can suitably carry out the management of the communication link in the mobile communication terminal.
It is desirable to mobile communication terminal also has: measuring unit, and it measures the received-signal strength of the communication link of setting up by the accessing wirelessly unit; Switch unit, it is according to switched the communication link that sends packet by the measured received-signal strength of measuring unit; And notification unit, it is notified to communication counterpart with this order when having switched the communication link of transmission packet by switch unit.According to this structure, can prevent because the data-bag lost that deterioration caused of received-signal strength etc. can efficiently and suitably send packet to communication counterpart like this.
It is desirable to mobile communication terminal also has: the unit is accepted in the communication link change, and it accepts the change request of the communication link that sends packet from communication counterpart; Switch unit, it switches the communication link that sends packet according to the change request of being accepted the communication link of accepting the unit by the communication link change; And notification unit, it is notified to communication counterpart with its order when having switched the communication link of transmission packet by switch unit.By this structure, can efficiently and suitably send packet to communication counterpart according to request from the communication counterpart corresponding with behaviour in service of communication line etc.
The feature of communicator of the present invention is to have: a plurality of communication units, its with communication counterpart between set up the communication link based on PPP of the communication that mode is different separately; Centralized unit, it concentrates the communication link of being set up by a plurality of communication units; Monitor unit, it monitors at least one the communication conditions of communication in a plurality of communication units; And communication link change request unit, it sends the change of the communication link of packet according to the communication conditions that monitor unit monitored to the communication counterpart request.
Among the communicator that the present invention relates to, according to the communication conditions such as behaviour in service of communication line, to send the change of the communication link of packet as the above-mentioned mobile communication terminal request of communication counterpart.Therefore according to the communicator that the present invention relates to, can effectively utilize, can make mobile communication terminal efficiently and suitably send packet like this to communication counterpart (this device) to communication line.
Yet the present invention can also record and narrate the invention into method of mobile communication and communication means as follows except can as above recording and narrating the invention into mobile communication terminal and communicator.The invention that this is the classification difference, essence is identical can obtain same effect and effect.
Promptly, the method of mobile communication that the present invention relates to is used for mobile communication terminal, this mobile communication terminal have with communication counterpart between set up a plurality of accessing wirelesslies unit based on the communication link of PPP of mode is different separately radio communication, the feature of this method of mobile communication is to have: concentrate step, concentrate the communication link of being set up by a plurality of accessing wirelesslies unit; Detect step, can carry out the accessing wirelessly unit of radio communication at least one detection in a plurality of accessing wirelesslies unit; And controlled step, but the accessing wirelessly unit that detects radio communication in detecting step is controlled so that it sets up communication link.
In addition, the communication means that the present invention relates to is used for communicator, this communicator have with communication counterpart between set up a plurality of communication units based on the communication link of PPP of mode is different separately radio communication, the feature of this communication means is to have: concentrate step, concentrate the communication link of being set up by a plurality of communication units; Monitoring step monitors at least one the communication conditions of communication in a plurality of communication units; And communication link change request step, according to the communication conditions that in monitoring step, is monitored, the communication counterpart request is sent the change of the communication link of packet.
Can concentrate at any time effectively communication link according to the present invention, even thereby under the environment that changes at any time along with the terminal mobile communication environment, also can suitably continue communication based on PPP.
Description of drawings
Fig. 1 is the figure of the functional structure of the mobile communication terminal that relates to of expression embodiment of the present invention.
Fig. 2 is the figure of the hardware configuration of the mobile communication terminal that relates to of expression embodiment of the present invention.
Fig. 3 is the precedence diagram of the processing (method of mobile communication) carried out of mobile communication terminal that expression relates to by embodiment of the present invention.
Fig. 4 is the precedence diagram of the processing (method of mobile communication) carried out of mobile communication terminal that expression relates to by embodiment of the present invention.
Fig. 5 is the precedence diagram of the processing (method of mobile communication) carried out of mobile communication terminal that expression relates to by embodiment of the present invention.
Fig. 6 is the figure of the example of employed information when being illustrated in the switching of notifying the communication link that sends packet.
Fig. 7 is the figure of the data structure of the PPP device driver managed by PPP equipment of expression.
Fig. 8 is the figure of the hardware configuration of the Fixed Communication Units that relates to of expression embodiment of the present invention.
Fig. 9 is the figure of the functional structure of the mobile communication terminal that relates to of expression the present invention the 2nd execution mode.
Figure 10 is the precedence diagram of the processing (method of mobile communication and communication means) carried out of the mobile communication terminal that relates to by embodiment of the present invention of expression and Fixed Communication Units.
Embodiment
Describe the preferred implementation of mobile communication terminal, communicator, method of mobile communication and the communication means that the present invention relates to below with reference to the accompanying drawings in detail.And to the identical element mark same-sign of description of drawings, and the repetitive description thereof will be omitted.
Fig. 1 represents the mobile communication terminal 10 that present embodiment relates to and the structure of Fixed Communication Units 20.Mobile communication terminal 10 is connected with a plurality of communication network N1, N2, is the device that can carry out a plurality of radio communications that mode is different separately, particularly is equivalent to mobile phone etc.For example have telephone network N1 and internet N2 etc. as mobile communication terminal 10 attachable communication networks.As described later, rely on mobile communicating (W-CDMA (Wideband Code Division MultipleAccess: Wideband Code Division Multiple Access (WCDMA) inserts)) to be connected to telephone network N1, (LocalArea network) is connected with internet N2 via WLAN.
Fixed Communication Units 20 is to be connected with a plurality of communication network N1, N2 in wired mode, by being connected with these communication networks N1, N2, can carry out the communicator of a plurality of communications that mode is different separately, particularly for example is equivalent to the PPP access server.Fixed Communication Units 20 as mentioned above, with mobile communication terminal 10 between set up the communication link based on PPP (PPP is connected) via communication network N1, N2, use this communication link to communicate.
The more detailed functional structure of mobile communication terminal 10 and Fixed Communication Units 20 then is described.As shown in Figure 1, mobile communication terminal 10 has W-CDMA communication modem 11, wireless lan adapter 12, L2TP (layer 2 tunnel protocol) virtual unit 13, PPP equipment 14, IP layer 15, effective WLAN detection portion 16, WLAN received-signal strength measurement section 17.And mobile communication terminal 10 also has the structural element as mobile phone etc. usually except the above-mentioned functions structural element.Fixed Communication Units 20 has isdn modem 21, Ethernet (registered trade mark) adapter 22, L2TP virtual unit 23, PPP equipment 24, IP layer 25.
W-CDMA communication modem 11 be carry out based on the radio communication of W-CDMA mode and and Fixed Communication Units 20 between set up accessing wirelessly unit based on the communication link of the PPP of this radio communication.Particularly, W-CDMA communication modem 11 is connected with telephone network N1 by the radio communication based on the W-CDMA mode, send the PPP connection request by telephone network N1 to the Fixed Communication Units 20 that is connected with telephone network N1, and set up communication link (PPP connection) based on PPP.In the Fixed Communication Units 20, (Integrated Services DigitalNetwork: integrated services digital network) modulator-demodulator 21 has the function that is connected with telephone network N1 to ISDN, accept PPP connection request from W-CDMA communication modem 11, carry out and W-CDMA communication modem 11 between set up communication link processing.That is, the isdn modem 21 that has of Fixed Communication Units 20 be and mobile communication terminal between set up communication unit based on the communication link of the PPP that communicates in the ISDN mode.Isdn modem 21 is set the IP address of Fixed Communication Units 20.And when setting up communication link, W-CDMA communication modem 11 obtains the IP address of regulation.The communication link of setting up by W-CDMA communication modem 11 utilizes 14 centralized management of PPP equipment.
L2TP virtual unit 13 be to use the IP address that obtained by wireless lan adapter 12 and Fixed Communication Units 20 between set up L2TP Tunnel (L2 tunnel), set up a function based on the accessing wirelessly unit of the communication link of PPP via this L2TP Tunnel.Particularly, L2TP virtual unit 13 sends L2TP connection request via internet N2 to the Fixed Communication Units 20 that is connected with internet N2 by wireless lan adapter and sets up L2TP Tunnel.In the Fixed Communication Units 20, L2TP virtual unit 23 is accepted L2TP connection request from mobile communication terminal 10 by the Ethernet Adaptation Unit 22 that is connected with internet N2, carry out and L2TP virtual unit 13 between set up L2TP Tunnel processing.
Then between L2TP virtual unit 13 and Ethernet Adaptation Unit 22, set up processing based on the communication link of PPP via the L2TP Tunnel of having set up.And when setting up communication link, L2TP virtual unit 23 obtains the IP address identical with the IP address that utilizes W-CDMA communication modem 11 to obtain (being different from the IP address that obtains by wireless lan adapter 12).This is in order to concentrate a plurality of communication links by a PPP equipment 14.Manage concentratedly by PPP equipment 14 by the communication link that L2TP virtual unit 13 is set up.
That is, the Ethernet Adaptation Unit 22 that has of Fixed Communication Units 20 is to communicate and a function of the communication unit that is connected with internet N2 by the Ethernet mode.In Ethernet Adaptation Unit 22, be set with the IP address of Fixed Communication Units 20.In addition, the L2TP virtual unit 23 that Fixed Communication Units 20 has is functions of communication unit, it is connected with Ethernet Adaptation Unit 22, use as mentioned above the IP address be set in the Ethernet Adaptation Unit 22 and mobile communication terminal 10 between set up L2TP Tunnel (L2 tunnel), set up communication link based on PPP via this L2TP Tunnel.
As mentioned above, can set up the communication link of being set up by W-CDMA communication modem 11 and these 2 communication links of communication link of being set up by wireless lan adapter 12 and L2TP virtual unit 13 at mobile communication terminal 10 based on PPP.
And when the communication link of having set up by W-CDMA communication modem 11 based on PPP (the 1st communication link), if L2TP virtual unit 13 is set up communication link (the 2nd communication link), then different with common PPP connection, only carry out LCP (Link Control Protocol: step LCP), and omission checking and NCP (Network Control Protocol: Network Control Protocol).
Certain communication link that PPP equipment 14 will pass through to be set up from the packet of IP layer 15 input sends to Fixed Communication Units 20, and certain communication link that passes through to be set up outputs to IP layer 15 after accepting the packet that receives from Fixed Communication Units 20.PPP equipment 14 comes the transceive data bag by each accessing wirelessly unit (serial communication device) 11,12,13.Therefore PPP equipment 14 can use a plurality of communication paths by the pointer that keeps pointing to a plurality of serial communication devices.In addition, all serial communication devices have all kept pointing to the pointer of shared PPP equipment 14, also can receive packet from certain communication link by a PPP equipment 14.Under the situation of having set up a plurality of communication links, PPP equipment 14 is set the communication link that is used for the packet transmission among these communication links.
In addition as described later, PPP equipment 14 still is such control unit, promptly when the notice accepted from effective WLAN detection portion 16 about the order that detects the WLAN accessing points that can communicate by wireless lan adapter 12, control so that wireless lan adapter 12 and L2TP virtual unit 13 are set up communication link (also IP layer 15 being controlled in order to obtain the IP address).
In addition as described later, PPP equipment 14 carries out the control based on this received-signal strength from the notice of WLAN received-signal strength measurement section 17 receptions by the received-signal strength of the communication link of wireless lan adapter 12 and 13 foundation of L2TP virtual unit.PPP equipment 14 according to received-signal strength detect this communication link become invalid.Particularly, when received-signal strength is lower than predetermined threshold value or be in the state that can't receive electric wave, PPP equipment 14 detect this communication link become invalid.That is, PPP equipment 14 is to detect the function that communication link has become invalid detecting unit.
And not only can under communication link is invalid situation, carry out above-mentioned communication link switching may not, can be higher than also that predetermined (the 1st) switch at measured received-signal strength may not with the switching of carrying out above-mentioned communication link under the situation of threshold value.In addition, switch with threshold value and when this utilizes the communication link of W-CDMA communication modem 11 to send packet constantly when measured received-signal strength is higher than predetermined (the 2nd), changeable is the communication link of being set up by wireless lan adapter 12 and L2TP virtual unit 13.
In addition, in Fixed Communication Units 20, also have PPP equipment 24 and IP layer 25, have the function corresponding with the PPP equipment 14 of mobile communication terminal 10 and IP layer 15.That is, PPP equipment 24 is connected with L2TP virtual unit 23 with isdn modem 21, and this PPP equipment 24 is centralized unit of concentrating the communication link of being set up by isdn modem 21, Ethernet Adaptation Unit 22 and L2TP virtual unit 23.
Effectively WLAN detection portion 16 is unit of surveying the accessing points (accessing points of valid wireless LAN) of the WLAN that can be communicated by wireless lan adapter 12.That is, effectively the detecting unit that can carry out based on the radio communication of accessing wirelessly unit detects in WLAN detection portion 16.Particularly, effectively WLAN detection portion 16 in advance monitoring wireless lan adapter 12 and carry out above-mentioned detection whether at the electric wave that receives from the accessing points of WLAN.When effective WLAN detection portion 16 detects the accessing points of the WLAN that can be communicated by wireless lan adapter 12, with this order to PPP equipment 14 notices.
In addition, as long as in a plurality of accessing wirelesslies unit 11,12 at least one carried out whether can carrying out the detection of radio communication.For example, constitute detection in the present embodiment and can carry out radio communication, equally also can constitute detection and can carry out radio communication based on W-CDMA communication modem 11 based on WLAN.
WLAN received-signal strength measurement section 17 is to measure the measuring unit of the received-signal strength of the communication link of being set up by wireless lan adapter 12 and L2TP virtual unit 13.WLAN received-signal strength measurement section 17 with the radio wave intensity notification measured to PPP equipment 14.The information of received-signal strength is used to detect communication link becomes invalid situation.That is, WLAN received-signal strength measurement section 17 is to detect the function that the communication link of being set up becomes invalid detecting unit.In addition, the information of received-signal strength is used for judging the switching that sends used communication link at packet.It more than is the functional structure of the mobile communication terminal 10 that relates to of present embodiment.
Fig. 2 represents the hardware configuration of mobile communication terminal 10.Central processing unit) 101, main storage means is RAM (Random Access Memory: random asccess memory) 102 and ROM103 (Read OnlyMemory: read-only memory), hardware such as operating portion 104, wireless communication part 105, display 106 and antenna 107 constitute as shown in Figure 2, mobile communication terminal 10 is by CPU (Central Processing Unit:.And wireless communication part 105 is provided with according to the mode of each radio communication usually.Carry out work by these inscapes, bring into play each function of mobile communication terminal 10 above-mentioned and described later.
Fig. 8 represents the hardware configuration of Fixed Communication Units 20.As shown in Figure 8, Fixed Communication Units 20 constitute have CPU201, main storage means is RAM202 and data transmitting/receiving equipments such as ROM203, network interface card are the computer of hardware such as auxilary units such as communication module 204 and hard disk 205.Carry out work by these inscapes, bring into play each function of Fixed Communication Units 20 above-mentioned and described later.
Use performed processing (method of mobile communication) in the mobile communication terminal 10 (and Fixed Communication Units 20) that the precedence diagram of Fig. 3～Fig. 5 illustrates that present embodiment relates to below.With the user to the operation of mobile communication terminal 10 etc. as triggering, when mobile communication terminal 10 by based on the communication link of PPP and Fixed Communication Units 20 between carry out this processing when carrying out the transmitting-receiving of packet.Also specify Fixed Communication Units 20 this moment as communication counterpart.
In mobile communication terminal 10, send PPP connection request (S101) by telephone network N1 to Fixed Communication Units 20 by W-CDMA communication modem 11.In Fixed Communication Units 20, accept this PPP connection request (S131) by isdn modem 21, between mobile communication terminal 10 and Fixed Communication Units 20, set up 1PPP and connect.The 1PPP connection of being set up is managed by PPP equipment 14.In addition, set 1PPP by PPP equipment 14 this moment and connect, as the communication link that sends packet.
Use this 1PPP to connect, mobile communication terminal 10 begins to communicate by letter with Fixed Communication Units 20.But the communication link bandwidth of W-CDMA is narrower, communicates so preferably switch to the communication link of the WLAN of broader bandwidth in the time can utilizing WLAN.Therefore carry out following processing in the present embodiment.
In mobile communication terminal 10, survey effective accessing points (S102, detect step) by effective WLAN detection portion 16.This detection is carried out often.When in mobile communication terminal 10 moves to the service area of WLAN and by effective WLAN detection portion 16, detecting effective accessing points, notify this order (S103, controlled step) to PPP equipment 14 from effective WLAN detection portion 16.When not detecting effective accessing points (S103), repeat the detection of accessing points.
When detecting effective accessing points, set up the processing that 2PPP connects as described below by the control of PPP equipment 14 by PPP equipment 14.At first, use agreements such as DHCP by IP layer 15, obtain the IP address by wireless lan adapter 12.Then send to Fixed Communication Units 20 and be used in the above-mentioned IP address and distribute to the L2TP connection request (S104, controlled step) of setting up L2TP Tunnel between the IP address of Ethernet Adaptation Unit 22 of Fixed Communication Units 20 from L2TP virtual unit 13.In Fixed Communication Units 20, rely on L2TP virtual unit 23 to receive the L2TP connection request by Ethernet Adaptation Unit 22, set up L2TP Tunnel (S132).
In mobile communication terminal 10, send the PPP connection request (S105, controlled step) that 2PPP connects via the L2 tunnel to Fixed Communication Units 20 then by L2TP virtual unit 13.In Fixed Communication Units 20, receive the PPP connection request by L2TP virtual unit 23 by Ethernet Adaptation Unit 22, between mobile communication terminal 10 and Fixed Communication Units 20, set up 2PPP and connect (S133).Here, the IP address of 2PPP connection is identical with the IP address that 1PPP connects.
Then in mobile communication terminal 10, concentrate 2PPP to connect by PPP equipment 14 and be connected (S106, concentrated step) with 1PPP.The communication link that will send packet by PPP equipment 14 connects (communication link of W-CDMA) from 1PPP and switches to 2PPP and connect (communication link of WLAN) (S107, switch step) in addition.On the other hand, in Fixed Communication Units 20, also concentrate 2PPP to connect and be connected (S134, concentrated step) with 1PPP by PPP equipment 24.
Then in mobile communication terminal 10, change request (S108, notifying process) to the link that Fixed Communication Units 20 sends to the change of WLAN communication link by PPP equipment 14.In Fixed Communication Units 20,, the communication link that sends packet is connected (communication link of W-CDMA) from 1PPP switch to 2PPP connection (communication link of internet) (S135) by this link change request of PPP equipment 24 receptions.
By above-mentioned a series of processing, mobile communication terminal 10 is an opportunity with the service area that enters WLAN, the communication based on PPP can be switched to WLAN, and can carry out broadband connections.
Then with reference to the precedence diagram of Fig. 4, the example when mobile communication terminal 10 moves to outside the service area of WLAN is described.
In mobile communications device 10, come in the periodic measurement communication process received-signal strength from the accessing points of the WLAN that is used for communication by WLAN received-signal strength measurement section 17.Notify measured received-signal strength from WLAN received-signal strength measurement section 17 to PPP equipment 14.Judge by the PPP equipment 14 that has received notice whether received-signal strength is lower than predetermined threshold value or whether this terminal 10 is in the state (invalid) (S111, measuring process, detection step) that can't receive electric wave then.Be not less than predetermined threshold value and this terminal 10 when not being in the state that can't receive electric wave when being judged as received-signal strength, continue the measurement of the received-signal strength that undertaken by WLAN received-signal strength measurement section 17.
When being judged as received-signal strength when being lower than predetermined threshold value or this terminal 10 and not being in the state that can't receive electric wave, the communication link that will send packet by PPP equipment 14 connects (communication link of WLAN) from 2PPP and switches to 1PPP and connect (communication link of W-CDMA).In addition, remove 2PPP by PPP equipment 14 this moment and connect (S112, switch step, removal step).
Follow in this, in mobile communication terminal 10, change request (S113, notifying process) to the link that Fixed Communication Units 20 sends to the change of W-CDMA communication link by PPP equipment 14.In Fixed Communication Units 20, receive this link change request by PPP equipment 24, the communication link that sends packet is switched to 1PPP from 2PPP connection (communication link of internet) connect (communication link of W-CDMA) (S141).
Follow in mobile communication terminal 10, send the PPP cut-out request that 2PPP connect by L2TP virtual unit 13 to Fixed Communication Units 20, and cut off 2PPP connection (S114, controlled step).In Fixed Communication Units 20, receive PPP by L2TP virtual unit 23 and cut off request, cut off 2PPP and connect (S142).
In mobile communication terminal 10, send the cut-out request (S115, controlled step) of L2TP Tunnel to Fixed Communication Units 20 from L2TP virtual unit 13 then.In Fixed Communication Units 20,, cut off L2TP Tunnel (S143) by the cut-out request of L2TP virtual unit 23 reception L2TP Tunnel.
By above-mentioned processing, mobile communication terminal 10 becomes the state (state before the S102 shown in Figure 3) of only having set up 1PPP connection (communication link of W-CDMA).Mobile communication terminal 10 returns the processing of S102 shown in Figure 3 afterwards.If in S102, detect the accessing points of new valid wireless LAN, then carry out above-mentioned S104 processing afterwards.
By above-mentioned a series of processing,, thereby can suitably proceed the communication of PPP even mobile communication terminal 10 is also brought in constant renewal in the visit of valid wireless LAN in moving.
In the processing of using Fig. 4 explanation, expressed when the received-signal strength of WLAN dies down, cutting off 2PPP connects and L2TP Tunnel, enter the example of the step of surveying new effective WLAN accessing points, yet also can carry out the processing (not carrying out the processing of S114 and S115) before S113, and keep 2PPP to connect in advance.In this case, carry out the processing shown in the precedence diagram of Fig. 5.In addition in this case, do not remove the processing of the communication link of above-mentioned WLAN.
As shown in Figure 5, after this in mobile communication terminal 10, come periodic measurement to connect the received-signal strength of the communication link of the WLAN that keeps as 2PPP by WLAN received-signal strength measurement section 17.Measured received-signal strength is informed to PPP equipment 14 from WLAN received-signal strength measurement section 17.By having accepted the PPP equipment 14 of notice, judge whether received-signal strength is higher than predetermined (the above-mentioned the 2nd) and switches with threshold value (S121, measuring process) then.When being judged as received-signal strength when not being higher than the threshold value of predetermined switching usefulness, continue the measurement of the received-signal strength that WLAN received-signal strength measurement section 17 carries out.
When being judged as received-signal strength when being higher than predetermined switching and using threshold value, the communication link that will send packet by PPP equipment 14 connects (communication link of W-CDMA) from 1PPP and switches to 2PPP and connect (communication link of WLAN) (S122, switch step).
Follow in this, in mobile communication terminal 10, ask (S123, notifying process) to Fixed Communication Units 20 transmissions to the link change of the communication link change of internet by PPP equipment 14.In Fixed Communication Units 20, receive this link change request by PPP equipment 24, the communication link that sends packet is switched to 2PPP from 1PPP connection (communication link of W-CDMA) connect (communication link of internet) (S151).After this repeat above-mentioned S111 processing afterwards.
By above-mentioned a series of processing, the PPP that mobile communication terminal 10 does not cut off based on WLAN connects, and just can switch preferred communication link at any time, thereby can suitably proceed the communication of PPP.
Then, information used, transmitting-receiving between mobile communication terminal 10 and Fixed Communication Units 20 when notifying the switching of the communication link that sends packet is described.This notice is used the LCP negotiation message of PPP.Fig. 6 represents the message M101 of link change request and the example of response message M102.The value of the message M101 of link change request storage representation link change request in the code domain of expression command code.Designated equipment number in the data field of message M101 in addition.In the present example, " 1 " is that 1PPP connects, and " 2 " are that 2PPP connects.The value of the response message M102 of the message M101 that change is asked at link storage representation link change request responding in code domain.And the value that the storage representation link changes successfully or fails in the data field of response message M102.
Then, Fig. 7 illustrates for the mobile communication terminal 10 of realizing present embodiment, the data structure of the PPP device driver of managing by PPP equipment 14.In Free BSD4.11R, the PPP device driver keeps data with the such structure of ppp_softc, the sc_inq of the reception data packet queue of sc_rawq, the PPP control usefulness that the ppp_softc structure maintains the ifnet structure, the pointer sc_devp that points to the tty structure that is used for communication link that comprise IP address information etc., receive data packet queue, sends the sc_fastq of data packet queue etc.In addition, owing to utilize a ppp_softc structure to keep a plurality of communication links, and switch arbitrarily, thereby appended sc_master and sc_slave in the present embodiment, and constitute the pointer that points to a communication link (tty structure) respectively.In order to select to use which communication link, sc_devp is for pointing to the pointer of sc_master or sc_slave.Used 2 kinds of communication links in the present embodiment, even but be communication link more than 3 kinds, only just can realize too by appending the pointer that points to the 3rd kind of communication link.The tty structure of each communication link has the backpointer t_sc of the ppp_softc structure that points to this communication link of management.If realize the ppp multilink of multiple communication path, the t_sc of then a plurality of tty structures becomes the pointer that points to same ppp_softc structure.Therefore, the packet that receives from a plurality of communication links can be put into the reception data packet queue sc_rawq of same ppp_sofc structure.
By making the sc_devp pointer become sc_master or sc_slave, can switch the selection of the communication link that sends packet.This switching can be called ioctl by the control system to communication link device as follows and be carried out.
intioctl(int?d，PPPIOSCDEVICE，int?dev_id)
In the 2nd independent variable of ioctl, append the such ID of PPPIOSCDEVICE, for by the relevant PPP equipment 14 of the communication link device of the 1st independent variable appointment, can select communication link by the 3rd independent variable appointment.
In addition, for a plurality of communication links being focused on the PPP equipment, and append the such control ID of PPPIOCMUNIT as described below, on the PPP equipment 14 relevant, concentrate the communication link of being set up by the PPP equipment 14 of the unit number of the 3rd independent variable appointment by the communication link device of the 1st independent variable appointment.
int?ioctl(int?d，PPPIOCMUNIT，int?unit)
Call by appending these apparatus control systems, can communicate concentrating and selecting of link according to waiting as the pppd of the control demons of PPP and other application programs, can select with the application program rank in the value and the corresponding communication link of characteristic of information.
As mentioned above, according to present embodiment, by the so a plurality of accessing wirelesslies unit of W-CDMA communication modem 11 and wireless lan adapter 12 and L2TP virtual unit 13, with communication counterpart between set up the communication link based on PPP of the radio communication that mode is different separately, and concentrate the communication link of being set up.Carry out thus of the communication of a plurality of communication links as a communication path.
In addition in the present embodiment, the situation that detection can utilize wireless lan adapter 12 to communicate is set up communication link by wireless lan adapter 12 and L2TP virtual unit 13.Can concentrate the effective communication link at any time that can communicate according to present embodiment thus, so even under the environment that changes at any time along with the terminal mobile communication environment, also can suitably proceed communication based on PPP.
In addition, as present embodiment, and if communication counterpart between set up the L2 tunnel, set up communication link via this L2 tunnel, even then can't via internet etc. directly foundation also can set up communication link based on the situation of the communication link of PPP.Thus, the tediously long property of communication link can be improved, communication can be more suitably proceeded.
In addition as present embodiment,, then can suitably carry out the management of the communication link of mobile communication terminal 10 if it is invalid and it is removed in the object from concentrating to detect communication link.
As present embodiment,, then can prevent the data-bag lost that deterioration caused of received-signal strength etc. in addition, can efficiently and suitably send packet like this to communication counterpart if switch the communication link that carries out the packet transmission according to received-signal strength.
In addition, in the present embodiment only with the communication link of WLAN as controlling object, but and nonessentially become such structure, also can make the communication link of the communication link of W-CDMA and WLAN same, only with the communication link of W-CDMA as controlling object.
In addition, carrying out packet by a communication link in the present embodiment sends, yet and nonessentially only undertaken by a communication link, for example also can under all good situation of a plurality of communication links of being set up, similarly carry out the transmission of packet by a plurality of communication links with existing MultiLink PPP.
Fixed Communication Units 20a and mobile communication terminal 10 that the present invention's the 2nd execution mode relates to then are described.
Fig. 9 represents the Fixed Communication Units 20a that present embodiment relates to and the structure of mobile communication terminal 10.The Fixed Communication Units 20a that present embodiment relates to is identical with mobile communication terminal 10 with the Fixed Communication Units 20 of above-mentioned execution mode with the basic structure of mobile communication terminal 10.As shown in Figure 9, the Fixed Communication Units 20a that relates to of present embodiment also has communication line monitoring unit 26.Communication line monitoring unit 26 is connected with PPP equipment 24, can carry out information transmit-receive with PPP equipment 24 and carry out supervision of isdn modem 21 etc. by following PPP equipment 24.
The quantity that communication line monitoring unit 26 monitors is 21 that set up by isdn modem, connect via the PPP of telephone network N1.That is, communication line monitoring unit 26 is at least one the monitor units of communication conditions of communication in a plurality of communication units that monitor among this device 20a.The communication conditions that is monitored for example is equivalent to the behaviour in service (quantity that the PPP that is set up connects) of aforesaid communication line.
Communication line monitoring unit 26 is according to the quantity of the above-mentioned PPP connection that is monitored, to send the communication link change request unit of the communication link of packets as the mobile communication terminal 10 request changes of communication counterpart.It particularly is following function.Communication line monitoring unit 26 is in advance about the PPP linking number via telephone network N1, and the storage maximum allows the PPP linking number.Herein, the maximum PPP of permission linking number is that Fixed Communication Units 20a (isdn modem 21) can accept the quantity that PPP connects simultaneously from telephone network N1.When communication line monitoring unit 26 is set up and connected via the PPP of telephone network N1, when having accepted PPP connection request from other notifying devices (mobile communications device 10 that comprises other) by telephone network N1, isdn modem 21 carries out following processing between mobile communication terminal 10 and this device 20a.And, when having accepted the PPP connection request, this order is transferred to communication line monitoring unit 26 from isdn modem 21 by PPP equipment 24.
The current PPP number of connection that 26 pairs of communication line monitoring units are monitored compares with the maximum PPP number of connection that allows, and whether judgement is abundant via the idle capacity of the PPP connection of telephone network N1.For example when maximum to allow the PPP number of connection be 2, when current PPP number of connection is 1, idle capacity is 1, it is abundant to be judged to be idle capacity.On the other hand, the quantity that connects at current PPP is 2 o'clock, and idle capacity is 0, and it is insufficient to be judged to be idle capacity.Be judged to be under the sufficient situation of idle capacity that PPP connects, communication line monitoring unit 26 is indicated isdn modem 21 usually, so as with the communicator that has sent the PPP connection request between set up PPP and be connected.
Under the inadequate situation of idle capacity that is judged to be the PPP connection, 26 pairs of communication line monitoring units have been set up the change of the communication link of mobile communication terminal 10 requests (link change request) the transmission packet via the PPP connection of telephone network N1.Particularly, be the change request of shifting to other communication networks such as for example internet N2 from telephone network N1.Above-mentioned change request is to be undertaken by send the signal that this request relates to (utilizing the isdn modem 21 of communication line monitoring unit 26 controls) via telephone network N1.
In addition, PPP equipment 24 as described later, receive the link change request that sends from mobile communication terminal 10 according to above-mentioned request, the communication link that sends packet is switched to 2PPP from 1PPP connection (communication link of W-CDMA) connect (communication link of internet).In addition, communication line monitoring unit 26 has been carried out communication link after changing as described above, as usually, isdn modem 21 is indicated so that with the communicator that has sent the PPP connection request between set up PPP and be connected.It more than is the structure of the Fixed Communication Units 20a that relates to of present embodiment.
Corresponding to said fixing communicator 20a, in the mobile communications device 10 that present embodiment relates to, except the mobile communications device 10 of a last execution mode, also has following function.W-CDMA communication modem 11 is is also accepted the unit as the communication link change of accepting the communication change request of being undertaken by Fixed Communication Units 20a and is played a role.Particularly, W-CDMA communication modem 11 receives this change request signal that sends from Fixed Communication Units 20a as mentioned above.W-CDMA communication modem 11 is notified to PPP equipment 14 to the order of having accepted communication change request.
When not when foundation between this terminal 10 and the Fixed Communication Units 20a is connected via the PPP of internet N2, the PPP that PPP equipment 14 is set up via internet N2 between this terminal 10 and Fixed Communication Units 20a is connected, this PPP is connected to be set at the communication link that is used for the packet transmission then.Then, PPP equipment 14 is same with a last execution mode, to the link change request of Fixed Communication Units 20a transmission to the communication link change of WLAN.It more than is the structure of the mobile communication terminal 10 that relates to of present embodiment.
Use the precedence diagram of Figure 10 that the processing of carrying out in mobile communication terminal 10 that present embodiment relates to and Fixed Communication Units 20a (method of mobile communication and communication means) is described below.Here, the PPP that has set up between mobile communication terminal 10 and Fixed Communication Units 20a via telephone network N1 connects (1PPP connection), and the PPP that does not set up via internet N2 connects (2PPP connection).
In Fixed Communication Units 20a, monitor the quantity (S170, monitoring step) of the 1PPP connection of setting up by communication line monitoring unit 26 by isdn modem.In addition, be not to carry out to the supervision of PPP number of connection in predetermined timing, carry out but (for example wait at certain intervals) often.
Send the PPP connection request from the communicator that is different from above-mentioned mobile communication terminal 10 to Fixed Communication Units 20a herein.In Fixed Communication Units 20a, accept this PPP connection request (S171) by isdn modem 21.Next whether fully the current PPP number of connection that is monitored by 26 pairs of communication line monitoring units compares with the maximum PPP number of connection that allows, judge idle capacity that 1PPP connects (S172, communication link change request step).When the idle capacity that is judged to be the 1PPP connection is abundant, do not carry out following processing.
Be judged to be idle capacity that 1PPP connects when insufficient, then the mobile communication terminal 10 of having set up 1PPP and connecting sent the change request (S173, communication link change request step) of the communication link of packet by communication line monitoring unit 26 (control).In addition, the mobile communication terminal 10 that communicates the link change request change object of communication link (that is, as) is to determine according to the regulation rule that is stored among the Fixed Communication Units 20a (communication line monitoring unit 26).For example, the mobile communication terminal 10 of having set up the 1st communication link (that is, having set up the 1st the longest communication link) is the earliest asked.
In mobile communication terminal 10, accept above-mentioned request (S161, communication link change are accepted) by W-CDMA communication modem 11.Follow in mobile communication terminal 10, follow link change request, judge that by PPP equipment 14 whether can set up the 2PPP that can carry out the link change connects (S161, detection step, switch step).In the present embodiment, whether judgement is effective based on the radio communication of the WLAN of wireless lan adapter 12.Being judged to be to set up 2PPP and connect the time, in mobile communication terminal 10, do not carry out following processing.
Be judged to be under the situation that to set up the 2PPP connection, the basis that is controlled to be with PPP equipment 14, same with a last execution mode, send the PPP connection request (S162, controlled step, switch step) that 2PPP connects by L2TP virtual unit 13 to Fixed Communication Units 20a.In Fixed Communication Units 20a, receive the PPP connection request by L2TP virtual unit 23 via Ethernet Adaptation Unit 22, between mobile communication terminal 10 and Fixed Communication Units 20a, set up 2PPP and connect (S174).
Then, in mobile communication terminal 10, the 2PPP connection is connected concentrated (S163, concentrated step, switch step) with 1PPP by PPP equipment 14.In addition, by PPP equipment 14 communication link that sends packet is switched to 2PPP from the 1PPP connection and connect (S164, switch step).On the other hand, in Fixed Communication Units 20a, also the 2PPP connection is connected concentrated (S175, concentrated step) with 1PPP by PPP equipment 24.
Then, in mobile communication terminal 10, ask (S165, communication steps) to Fixed Communication Units 20a transmission to the link change of the communication link change of WLAN by PPP equipment 14.In Fixed Communication Units 20a, receive this link change request by PPP equipment 24, the communication link that sends packet is switched to 2PPP from 1PPP connection (communication link of W-CDMA) connect (communication link of internet) (S176).
Then, in mobile communication terminal 10 and Fixed Communication Units 20a, cut off 1PPP and be connected (S166, S167).In addition, Fixed Communication Units 20a sets up the processing (not shown) that is connected with PPP between the related communicator of the PPP connection request that S171 accepted.
By above-mentioned a series of processing, on one side mobile communication terminal 10 can continue with communicate by letter in the communication of mobile communication terminal 10, Yi Bian the communication link that mobile communication terminal 10 is used is transferred to the link via other communication networks.Communication conditions such as behaviour in service according to communication line are carried out the change of above-mentioned communication link.Therefore can communicate the efficient utilization of circuit according to present embodiment, can efficiently and suitably send packet to Fixed Communication Units 20a by mobile communication terminal 10 as communication counterpart.
And among above-mentioned execution mode, when when mobile communication terminal 10 has been accepted the PPP connection request, the change that communicates link is judged, but when having set up a plurality of communication link, can (being not triggering with the PPP connection request) be carried out above-mentioned judgement.In addition, the quantity that the PPP that is set up is connected is used for above-mentioned judgement, but the index of its communication conditions in addition of the expression that also communication unit can be related to is used for above-mentioned judgement.In addition, the change of communication link is made as from the PPP via telephone network N1 connects the change that connects to PPP, but can carry out the change opposite with it according to communication conditions via internet N2.At this moment, monitor the communication conditions of internet N2 in advance.
Claims (8)
1. mobile communication terminal, it has:
A plurality of accessing wirelesslies unit, its with communication counterpart between set up the communication link based on PPP of the radio communication that mode is different separately;
Centralized unit, it concentrates the above-mentioned communication link of being set up by above-mentioned a plurality of accessing wirelesslies unit;
Detecting unit, it can carry out the situation of radio communication at least one detection in above-mentioned a plurality of accessing wirelesslies unit; And
Control unit, it is controlled so that it sets up above-mentioned communication link detect the accessing wirelessly unit that can carry out radio communication by above-mentioned detecting unit.
2. mobile communication terminal according to claim 1 is characterized in that,
In the above-mentioned accessing wirelessly unit one obtains the IP address, use this IP address and above-mentioned communication counterpart between set up the L2 tunnel, set up communication link via this L2 tunnel.
3. mobile communication terminal according to claim 1 and 2 is characterized in that,
Above-mentioned detecting unit is in above-mentioned a plurality of accessing wirelesslies unit at least one, and detecting the communication link of setting up by this accessing wirelessly unit becomes invalid situation,
Above-mentioned centralized unit removal detects by above-mentioned detecting unit and becomes invalid above-mentioned communication link.
4. according to each described mobile communication terminal in the claim 1 to 3, it is characterized in that also having:
Measuring unit, it measures the received-signal strength of the above-mentioned communication link of setting up by above-mentioned accessing wirelessly unit;
Switch unit, it switches the communication link that sends packet according to the measured received-signal strength of above-mentioned measuring unit; And
Notification unit, it is notified to above-mentioned communication counterpart with this order when having switched the communication link of transmission packet by above-mentioned switch unit.
5. according to each described mobile communication terminal in the claim 1 to 4, it is characterized in that also having:
The unit is accepted in the communication link change, and it accepts the change request of the communication link that sends packet from above-mentioned communication counterpart;
Switch unit, it switches the communication link that sends packet according to the change request of being accepted the above-mentioned communication link of accepting the unit by above-mentioned communication link change; And
Notification unit, it is notified to above-mentioned communication counterpart with this order when having switched the communication link of transmission packet by above-mentioned switch unit.
6. communicator, it has:
A plurality of communication units, its with communication counterpart between set up the communication link based on PPP of the communication that mode is different separately;
Centralized unit, it concentrates the above-mentioned communication link of being set up by above-mentioned a plurality of communication units;
Monitor unit, it monitors at least one the communication conditions of communication in above-mentioned a plurality of communication unit; And
Communication link change request unit, it sends the change of the communication link of packet according to by the communication conditions that above-mentioned monitor unit monitored to above-mentioned communication counterpart request.
7. method of mobile communication, it is used for mobile communication terminal, this mobile communication terminal have with communication counterpart between set up a plurality of accessing wirelesslies unit based on the communication link of PPP of mode is different separately radio communication, this method of mobile communication has:
Concentrate step, concentrate the above-mentioned communication link of setting up by above-mentioned a plurality of accessing wirelesslies unit;
Detect step, can carry out the situation of radio communication at least one detection in above-mentioned a plurality of accessing wirelesslies unit; And
Controlled step is controlled so that it sets up above-mentioned communication link detect the accessing wirelessly unit that can carry out radio communication in above-mentioned detection step.
8. communication means, it is used for communicator, this communicator have with communication counterpart between set up a plurality of communication units based on the communication link of PPP of mode is different separately radio communication, this communication means has:
Concentrate step, concentrate the above-mentioned communication link of setting up by above-mentioned a plurality of communication units;
Monitoring step monitors at least one the communication conditions of communication in above-mentioned a plurality of communication unit; And
Communication link change request step according to the communication conditions that is monitored, sends the change of the communication link of packet to above-mentioned communication counterpart request in above-mentioned monitoring step.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007213996 | 2007-08-20 | ||
| JP2007213996 | 2007-08-20 | ||
| JP2008131034 | 2008-05-19 |
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| CNA2008102130023A Pending CN101374156A (en) | 2007-08-20 | 2008-08-20 | Mobile communication terminal, communication device, mobile communication method and communication method |
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| CN (1) | CN101374156A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420745A (en) * | 2011-11-04 | 2012-04-18 | 迈普通信技术股份有限公司 | 3G (the third Generation) communication method and system |
| CN103873376A (en) * | 2012-12-18 | 2014-06-18 | 中国银联股份有限公司 | Stream velocity control-based communication device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005094138A (en) * | 2003-09-12 | 2005-04-07 | Ntt Docomo Inc | Mobile terminal, communication system, protocol terminator, and communication control method |
| JP4127400B2 (en) * | 2004-06-18 | 2008-07-30 | 富士通株式会社 | Call management server program, call management method, and call management server |
| CN1719937A (en) * | 2004-07-09 | 2006-01-11 | 皇家飞利浦电子股份有限公司 | Method and circuit for roaming between different networks |
| JP4425923B2 (en) * | 2004-10-01 | 2010-03-03 | 三菱電機株式会社 | Access service network system, access device, and access service providing method |
-
2008
- 2008-05-19 JP JP2008131034A patent/JP4399016B2/en not_active Expired - Fee Related
- 2008-08-20 CN CNA2008102130023A patent/CN101374156A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420745A (en) * | 2011-11-04 | 2012-04-18 | 迈普通信技术股份有限公司 | 3G (the third Generation) communication method and system |
| CN103873376A (en) * | 2012-12-18 | 2014-06-18 | 中国银联股份有限公司 | Stream velocity control-based communication device and method |
Also Published As
| Publication number | Publication date |
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| JP4399016B2 (en) | 2010-01-13 |
| JP2009071803A (en) | 2009-04-02 |
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Application publication date: 20090225 |