CN1723663A - Router device and communication method - Google Patents
Router device and communication method Download PDFInfo
- Publication number
- CN1723663A CN1723663A CNA2004800017581A CN200480001758A CN1723663A CN 1723663 A CN1723663 A CN 1723663A CN A2004800017581 A CNA2004800017581 A CN A2004800017581A CN 200480001758 A CN200480001758 A CN 200480001758A CN 1723663 A CN1723663 A CN 1723663A
- Authority
- CN
- China
- Prior art keywords
- packet
- base station
- router apparatus
- situation
- local network
- 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.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
A router device includes: a lower node layer information acquisition section (38) for acquiring connection information on whether a lower node layer (34) is connected to a base station of an external network; and a route judgment section (40) for making judgment when receiving a packet destined from a radio terminal device in the same local network to an external network terminal, so that the received packet is transferred to the base station when the base station is connected and the transmission destination is judged by referencing the routing table if the base station is not connected. Thus, when the base station is connected, the received packet is transferred to the base station. Accordingly, it is possible to transfer the packet outside via the router device intended by a terminal and reduce the load in the local network.
Description
Technical field
The present invention relates to the router apparatus and the communication means of the local network that a plurality of router apparatus constituted that communicates by a plurality of wireless terminal devices with the external terminal devices that is present in the internet.
Background technology
At present, in the communication system of using IP (Internet Protocol), when certain local network is connected with external networks such as internets via a plurality of router apparatus (hereinafter referred to as external router apparatus), under the situation that wireless terminal device in the local network communicates via the external terminal devices at the external router apparatus of regulation and outside networking, different external router apparatus transfer data packets and in local network sometimes by the external router apparatus of transmission destination terminal installation transfer data packets to the outside.
For example, the user carry have be used for the cellular interfaces such as 3G (Third Generation) Moblie that are connected with external network with the mobile phone that is used for the intercommunicating wave point of local network, have and be used for WLAN interface that is connected with external network and first mobile apparatus that is used for the intercommunicating interface of local network and be not used in the interface that is connected with external network only have second mobile apparatus that is used for the intercommunicating interface of local network, do not have second mobile apparatus of external interface to communicate sometimes with the cellular interface and the external terminal devices of mobile phone.That is, the mobile phone and first mobile apparatus are used as external router apparatus.For example, when the secrecy of cellular interface is higher than the WLAN interface, paying attention under the situation of maintaining secrecy, considering to be connected with outside via mobile phone.At this moment, do not have second mobile apparatus of external interface to be used for the intercommunicating interface of local network, sending to mobile phone will be to the packet of external network transmission, and mobile phone uses cellular interface that the packet that receives is sent to the outside.
But the packet that will mobile phone receive is sent to outside networking.For example, in the external router apparatus of local network inside, consider to use when seek in the path dynamic routing protocol (for example, RIP (routing information protocol) or OSPF (open shortest path is preferential) etc. being arranged).Its reason be because a plurality of external router apparatus not necessarily be connected with external network, so in other cases for via other external router apparatus to outside transfer data packets, must guarantee the path in advance.At this moment, every regular hour switching path information between external router apparatus, in external router apparatus separately, constitute routing table.In routing table, recording and narrating the IP address that sends IP address, destination and corresponding with it next forwarding router etc.Each external router apparatus is receiving when not being to send to the packet of oneself, confirms whether to comprise entry (entry) to the IP address, transmission destination that receives packet with reference to the routing table of preserving.When in routing table, having the entry to the IP address, transmission destination that receives packet, be sent to the IP address of next forwarding router of correspondence with it receiving packet.
For example, use Ipv6 (Neighbor Discovery for IP Version 6:RFC2461), when external router apparatus received packet, whether the transmission destination IP Address Confirmation of reference reception packet had the entry to the IP address that receives packet in the routing table of being preserved.In same local network, has a plurality of and outside external router apparatus that is connected, these external router apparatus are set, make it at sending IP address, destination, packet is sent to external router apparatus different in the optimal same local network, in the case, be sent to external router apparatus different in the same local network with receiving packet.After this, from different external router apparatus to outside network transmission data bag.Send to the transmission source terminal device that receives packet simultaneously and revise message, the indicating terminal device sends packet from the next one and begins to send to optimal external router apparatus.Send the optimization in the path of packet like this.
In addition, between the IP of IP main frame layer and network layer, insert the MARP layer, just can from a plurality of router apparatus, select the default router of IP main frame use, thereby can share the load (for example, opening the 2000-295291 communique) of router apparatus with reference to the spy.
But, in above-mentioned existing technology, when the external router apparatus of local network inside being connected to outside base station, even under the situation of wanting to communicate at wireless terminal device via specific external router apparatus and outside terminal installation, the IP address of next forwarding router of the IP address, transmission destination of the reception packet in the routing table that external router apparatus is preserved is under the situation of IP address of other external router apparatus of local network inside, transmit to this external router apparatus, and can't be sent to external base station to packet.That is, wireless terminal device can't communicate via the external router and the outside networking of hope.
Summary of the invention
The objective of the invention is at external router apparatus with when the base station of external network is being connected, even at its IP address of next forwarding router that receives the IP address, transmission destination of packet is the IP address of the external router apparatus of for example same local network inside, do not transmit the packet that receives yet, and packet can be sent to outside base station to other external router apparatus.
In order to solve above-mentioned problem, structure of the present invention for the external router apparatus in local network with when outside base station is being connected, preferentially packet is sent to the base station of outside.
Like this, wireless terminal device just can send to outside base station to packet, and the routing table of preserving with the external router apparatus in the local network of wanting to be used for communicating with external terminal devices is irrelevant, and wireless terminal device can be via communicating via preceding external router apparatus and the outside that has determined.Because transmitting frequency, the packet between the external router apparatus in the local network descends, so can alleviate the load of local network inside.
The router apparatus that relates to the present invention's first scheme has: carry out with the connection processing portion of external network base station connection processing, obtain lower layer information obtaining section and path detection unit with the link information of base station from described connection processing portion; When the wireless terminal device in same local network receives the packet of the communicator that sends to external network, under the situation of being represented be connected with described base station by the obtained link information of described lower layer information obtaining section, this path detection unit is judged to be described base station and transmits the destination; Under the situation that described link information is represented not with described base station is connected, this path detection unit is judged with reference to routing table and is transmitted the destination.Like this, under the situation about being connected in the base station with the local network outside, just can preferentially be sent to outside base station to packet, the terminal installation in the local network can be sent to communication counterpart to packet via the external router apparatus of hope.
The connection instruction unit that the router apparatus that relates to alternative plan of the present invention also has the buffer storage that storage receives data and indicates described connection processing portion to be connected with the base station; Described lower layer information obtaining section also obtains the link information that could be connected with the base station of external network; When the described path wireless terminal device of detection unit in same local network receives the packet of the communicator that sends to external network, represent less than under the situation that is connected with the base station but can connects from the link information of described lower layer information obtaining section, to receive packet and be kept in the described buffer storage, simultaneously described connection instruction unit indicates described connection processing portion to be connected with the base station; Described connection processing portion finish with being connected of described base station after, the described reception data in the described buffer storage are sent to described base station.Like this, under the situation that can be connected with the base station of local network outside, just can preferentially be sent to outside base station to packet, the terminal installation in the local network can send packet to communication counterpart via the external router apparatus of hope.
The router apparatus that relates to third party's case of the present invention possesses: the mobile IP handling part and the path detection unit that carry out the position login in the home agent apparatus in being arranged at the internet; When the wireless terminal device in same local network receives the packet of the communicator that sends to external network, under the situation of existence to the entry of home agent apparatus, this path detection unit is judged to be described home agent apparatus and transmits the destination in the binding renewal tabulation of described mobile IP handling part; Upgrade under the situation about not existing in the tabulation the entry of home agent apparatus in the binding of described mobile IP handling part, this path detection unit is judged with reference to routing table and is transmitted the destination.Like this, finish under the situation of the position of home agent apparatus login, just can preferentially send packet to home agent apparatus via the base station of outside, the terminal installation in the local network can send packet to communication counterpart via the external router apparatus of hope.
The router apparatus that relates to the cubic case of the present invention, its described path detection unit is with reference to during routing table, under the situation of other router apparatus in next forwarding router is same local network, whether the wireless terminal device in the transmission source of inquiry reception packet will receive packet is sent to described next forwarding router.
The router apparatus that relates to the present invention's the 5th scheme, its described path detection unit is also replied under the situation of permission at described wireless terminal device, will receive packet and send next forwarding router to, is replying under objectionable situation, the discarded packet that receives.Like this, just the wireless terminal device refusal that can send the source by packet is via sending the different external router apparatus of packet, and can be not via undesirable external router apparatus.
The communication means that relates to the present invention's the 6th scheme, communication means at the local network that constitutes by a plurality of wireless terminal devices and a plurality of router apparatus that are used for communicating with the communicator that is present in the internet, router apparatus the base station with the local network outside be connected during when receiving packet from the wireless terminal device in the same local network, described reception packet is sent to the base station of the own outside that is being connected, and has nothing to do with the content of routing table.
The communication means that relates to the present invention's the 7th scheme has following steps: the wireless terminal device in the same local network is sent to the packet of the communicator of external network to router apparatus; When described router apparatus receives described packet, detect the connection status of the base station of this router apparatus and external network; With situation that described base station is being connected under, described packet is sent to described base station; Not with situation that the base station is connected under, transmit described packet according to routing table.Like this, just packet can be sent to the base station of local network outside; Under the situation about being connected in base station, can preferentially be sent to outside base station to packet with the local network outside; Terminal installation in the local network can be sent to communication counterpart to packet via the external router apparatus of hope.
Relate to the present invention the from all directions the communication means of case comprise the steps: that the wireless terminal device in the same local network sends to the packet of the communicator of external network to router apparatus; Described router apparatus detects the connection status of the base station of this router apparatus and external network when receiving described packet; With situation that described base station is being connected under, transmit described packet to described base station; Not with situation that the base station is connected under, judge the state that router apparatus could be connected with the base station of local network outside; In the time of can connecting, carry out connection processing with described base station; In the time of can not connecting, transmit described packet according to routing table.Like this, just can preferentially be sent to outside base station to packet, the terminal installation in the local network just can send packet to communication counterpart via the external router apparatus of hope.
The communication means that relates to the present invention's the 9th scheme, communication means at the local network that constitutes by a plurality of wireless terminal devices and a plurality of router apparatus that are used for communicating with the communicator that is present in the internet, router apparatus upgrades under the situation about existing in the tabulation the entry of home agent apparatus in binding, when the packet that receives from the wireless terminal device in the same local network, use sends described packet to communicator to the reverse tunnel of mobile IP via described home agent apparatus, and irrelevant with the content of routing table.
The communication means that relates to the present invention's the tenth scheme comprises the steps: that router apparatus carries out the position login in being arranged at the home agent apparatus of internet; Wireless terminal device in the same local network is sent to the packet of the communicator of external network to described router apparatus; Described router apparatus is when receiving described packet, in the binding renewal tabulation of this router apparatus, under the situation of existence to the entry of home agent apparatus, use reverse tunnel to transmit described packet to described communicator via described home agent apparatus to mobile IP; Upgrade under the situation about not existing in the tabulation in described binding, transmit with reference to routing table to the entry of home agent apparatus.Like this, finish under the situation of the position of home agent apparatus login, just can preferentially send packet to home agent apparatus via the base station of outside, the terminal installation in the local network can send packet to communication counterpart via the external router apparatus of hope.
As mentioned above, according to the present invention, when the communicator of external network sent packet, under external router apparatus and situation that the outside is being connected, the terminal installation of local network inside can communicate via selected external router apparatus in the terminal in local network.In addition, can reduce the traffic of local network inside.
Description of drawings
Fig. 1 is the network figure of the embodiment of the invention 1.
Fig. 2 is the pie graph of the wireless terminal device of the embodiment of the invention 1.
Fig. 3 is the pie graph of the external router apparatus of the embodiment of the invention 1.
Fig. 4 is the action flow chart of the external router apparatus of the embodiment of the invention 1.
Fig. 5 be the embodiment of the invention 1 according to routing table packet is sent to the external router apparatus of local network inside the time the flow graph of packet.
Fig. 6 is the flow graph of the packet when revising the path of transmission packet that message changed wireless terminal device of the embodiment of the invention 1.
Fig. 7 be the embodiment of the invention 1 preferentially packet is sent to the base station of local network outside the time the flow graph of packet.
Fig. 8 is the action flow chart of the external router apparatus of the embodiment of the invention 2.
Fig. 9 is the pie graph of the external router apparatus of the embodiment of the invention 2.
Figure 10 is the exemplary plot of the routing table of the embodiment of the invention 1.
Figure 11 is the exemplary plot of the modification message of the embodiment of the invention 1.
Figure 12 is the pie graph of the external router apparatus of the embodiment of the invention 3.
Figure 13 is the action flow chart of the external router apparatus of the embodiment of the invention 3.
Figure 14 is the network figure of the embodiment of the invention 3.
Figure 15 is the flow graph of the packet of the embodiment of the invention 3.
Embodiment
Below, use the description of drawings embodiments of the present invention.
(embodiment 1)
Fig. 1 is the network figure of the embodiment of the invention 1.In Fig. 1, wireless communication system possesses local network 1, internet 2, base station 16,17 and the external terminal devices 18 that is made of a plurality of wireless terminal devices 13,14,15 and external router apparatus 11,12.These external router apparatus 11,12 possess a wave point at least, and communicate with the base station of local network outside; Wireless terminal device 13,14,15 possesses a wave point at least; Base station 16,17 possesses a wave point at least, and is connected with the internet; External terminal devices 18 is the communicators that are connected with the internet.
Then, wireless terminal device 13 is described.The structure of other wireless terminal devices 14,15 and action are also identical.
Fig. 2 represents the pie graph of wireless terminal device 13.In Fig. 2, local network side lower layer handling part 21 includes interface portion 24, department of modulation and demodulation 25 and access control portion 26.IP handling part 22 carries out IP to be handled, and upper layer handling part 23 carries out upper layer such as application layer or transport layer to be handled, and the path of packet is selected to send by Path selection portion 27.
Action when at first, the wireless terminal device 13 transmission data that constitute as described above being described.
Wireless terminal device 13 employed application in according to upper layer handling part 23 has produced under the data conditions that send, after the processing of transport layers such as the title that carried out TCP (transmission control protocol) or UDP (User Datagram Protoco (UDP)) is additional, will send data and be sent to the IP handling part.In upper layer, selection can be connected to the external router apparatus of the access net that is fit to employed application.This chosen external router apparatus with its address setting in next forwarding router to the entry in the routing table of the address of using the external terminal devices that application program communicates, perhaps with its address setting in default router.
Be not limited thereto to the method that the external router apparatus of selecting sends packet as wireless terminal device 13, also can use other method.
Then, carry out conventional IP by IP handling part 22 and handle (IP title additional etc.), the IP packet is outputed to local network side lower layer handling part 21.At this moment, under the prefix of the transmission destination-address of the IP packet situation different, with reference to routing table with the local network under the wireless terminal device 13.And under the situation of existence to the entry of transmission destination-address, next is transmitted IP address set and sends IP packet to this.On the other hand, under the situation that does not have entry, send the IP packet to the default router of having set in advance.Under Ipv4, carry out ARP and handle, under Ipv6, carry out the neighbour and search the address of handling the lower layer of obtaining next forwarding or default router, this address is transmitted the IP packet that has added the lower layer title.
In local network side lower layer handling part 21, access control portion 26 is used for the access control that communicated by a plurality of wireless terminal devices, carries out modulation treatment by department of modulation and demodulation 25.Afterwards, send the signal of telecommunication by interface portion 24 to free space or cable.
Action when then, wireless terminal device 13 reception data being described.
Carrying out the processing of IP title in IP handling part 22, is to send under the situation of oneself receiving the IP packet, gives upper layer control part 23 with data passes, be not to send under the situation of oneself, the discarded IP packet that receives.Upper layer handling part 23 carry out TCP or UDP transport layers such as title elimination processing and use in the processing of upper layers such as reception data processing.
Then, external router apparatus 11,12 is described.
Fig. 3 is the pie graph of external router apparatus 11,12.In Fig. 3, local network side lower layer handling part 31 has and local network side lower layer handling part 21 identical functions, includes: interface portion 24, department of modulation and demodulation 25 and access control portion 26.IP handling part 32 carries out IP to be handled; Path judging part 40 is in the transmission destination of IP layer determinating receiving data bag; Upper layer handling part 33 carries out the processing of upper layer such as application layer or transport layer.Access net side lower layer handling part 34 is included as interface 35, department of modulation and demodulation 36 and the access control portion 37 that communicates with base station 16 or base station 17 and use.This access net side lower layer handling part 34 has the function of carrying out the connection processing portion of connection processing with the base station.Whether lower layer information obtaining section 38 obtains and link informations such as the base station of outside is connected from lower layer.Buffer storage 39 temporary transient storage when not having to be connected with outside base station sends packet.Path detection unit 40 according to the transfer path of the connection status determinating receiving data bag of base station.Interface portion 24,35 is represented antenna under wireless condition, represent connector etc. under wired situation.
The process chart of use Fig. 4 illustrates the action of the external router apparatus 11,12 of above-mentioned formation.In addition, the action of the lower layer handling part 31 of local network side and upper layer handling part 33 is identical with wireless terminal device 13.
At first, the local network side lower layer handling part 31 of external router apparatus 11 is when the wireless terminal device 13 in same local network 1 receives packet (step S401), IP handling part 32 confirms whether be (the step S403) that sends to oneself with reference to the IP address, transmission destination (step S402) that receives packet.Be to send under the situation of oneself, the data division that IP handling part 32 will receive packet passes to upper layer handling part 33 (step S406), be not to send under the situation of oneself, and indication path detection unit 40 is judged the transmission destination.Path detection unit 40 confirms oneself whether to be connected with the base station 16 of outside (step S404) to lower layer information obtaining section 38.And, receive from lower layer information obtaining section 38 with the situation of replying that base station 16 is connected under, path detection unit 40 is replied to IP handling part 32 and is transmitted the destination and be made as base station 16.IP handling part 32 receives this and replys, to external base station 16 transmitting and receiving data bags (step S405).The path of the packet of this moment as shown in Figure 7.
On the other hand, do not having under the situation about being connected with base station 16, whether path detection unit 40 is confirmed to exist to sending the entry (step S408) of IP address, destination with reference to own routing table (step S407) of being preserved.Figure 10 represents the structure of routing table.
In Figure 10, comprise the IP address 1002 that sends IP address, destination (prefix) 1001 and next forwarding router in the routing table at least.Receiving under the situation of packet, general router apparatus is with reference to routing table, under IP address, the transmission destination 1001 corresponding to situations of the IP address, transmission destination that receives packet or prefix and routing table, be sent to next corresponding forwarding router 1002.
Do not having under the situation of entry, path detection unit 40 is replied the transmission destination to handling part 32 and is not logined.IP handling part 32 receives this and replys, and discards packet or it temporarily is stored in (step S409) in the buffer storage 39.On the other hand, exist under the situation of entry, whether the IP address of the external router apparatus 12 that the IP address that path detection unit 40 is confirmed next forwarding router and same local network are interior consistent (step S410).Under the inconsistent situation in IP address of the IP address of next forwarding router and the external router apparatus 12 in the same local network, detection unit 40 notice IP handling parts 32 in path do not transmit the destination, and IP handling part 32 is discarded packets or it temporarily is stored in (step S409) in the buffer storage 39.
At this moment, path detection unit 40 is accepted notice from lower layer information obtaining section 38 when having established with being connected of base station 16, and the packet that indication IP handling part 32 will be kept in the buffer storage is sent to outside base station 16.Like this, IP handling part 32 just can be sent to the packet of this preservation base station 16.
Then, under the consistent situation in the IP address of the external router apparatus 12 of path detection unit 40 in the IP address of next forwarding router and same local network, inquiry could also send external router apparatus 12 (step S411) to receiving packet as receiving the wireless terminal device 13 that packet sends the source.
Wireless terminal device 13 is replied permission to external router apparatus 12 and is transmitted or do not allow transmission for the inquiry from external router apparatus 12.Allow this transmission, do not allow the judgement of this transmission or be set in advance in the Path selection portion 27 of wireless terminal device 13, or when the inquiry that has from external router apparatus, judge and set by the user.For example, if the employed application program of user must be maintained secrecy, will consider that so refusal is via the access network transmission packet of not guaranteeing safe enough.Perhaps, if there is other the external router apparatus with the initial selected external router apparatus same characteristic features of wireless terminal device of having, consider that so allowing to connect router apparatus to this external wireless transmits.
Then, external router apparatus 11 receptions are replied from wireless terminal device 13, and path detection unit 40 confirms to allow to transmit, do not allow to transmit (step S412).Under the situation of replying expression permission transmission, detection unit 40 notice IP handling parts 32 in path will transmit the destination as external router apparatus 12, and IP handling part 32 transmits (step S413) to external router apparatus 12.The path of the packet of this moment will be sent to external router apparatus 12 from external router apparatus 11 by the packet that wireless terminal device 13 sends as shown in Figure 5, arrive external terminal devices 18 via external base station 17.
On the other hand, from the replying under the situation that expression do not allow to transmit of wireless terminal device 13, path detection unit 40 notice IP handling parts 32, IP handling part 32 is discarded to be received packets or it temporarily is kept at (step S409) in the buffer storage 39.
As mentioned above, according to the present invention, when external router apparatus receives the packet of the external terminal devices that sends to external network at the wireless terminal device in local network, with situation that outside networking is connected under preferentially to outside transfer data packets, so when wireless terminal device is being connected with outside networking at selected external router apparatus, can communicate via this external router apparatus all the time.At this moment, because the external router apparatus transfer data packets of other in local network not, so can also alleviate the load of local network inside.
In step S413, the IP handling part 32 of external router apparatus 11 also can judge whether to send modification message to wireless terminal device 13.The wireless terminal device 13 in this modification message indication transmission source sends to different external router apparatus to packet.
Figure 11 represents to revise an example of the form of message 1100, by type field 1103, code field 1104 with check summation field 1105, reservation field 1106, DAF destination address field 1101 and send destination address field 1102 and constitute.In this case, in DAF destination address field 1101, set the IP address of external router apparatus 12, in sending destination address field 1102, set the IP address of external terminal devices 18.
From the viewpoint of safety, also there is the situation of revising message 1100 of not using.Sending under the situation of revising message 1100, external router apparatus 11 returns holding state after sending and revising message 1100.
Even also can obtain same effect under the situation of step S403 in the transposing present embodiment and the order of step S404.
(embodiment 2)
Fig. 9 is the pie graph of the external router apparatus of the embodiment of the invention 2.In Fig. 9, possess connect on instruction unit 91 these aspects different with embodiment 1.
The information indication that these connection instruction unit 91 bases could be connected with the base station 16 of outside is connected with the base station.
Then, the action of the external router apparatus of the process chart explanation present embodiment of use Fig. 8.
In Fig. 8, the external router apparatus of present embodiment is when not being connected with the base station with the difference of the external router apparatus of embodiment 1, and trial is connected with the base station.That is, the action from step S801 to step S806 and embodiment's 1 is identical to the action of step S406 from step S401.
Do not having under the situation about being connected, connecting instruction unit 91 bases and access net side lower layer handling part 34 confirmed whether be attachable state (step S807) from the information such as received power intensity of the signal of base station 16 with outside base station 16.Connect instruction unit 91 when access net side lower layer handling part 34 receives replying of can being connected with the base station 16 of outside, connect indication, access net side lower layer handling part 34 carries out connection processing (step S808).IP handling part 32 will receive packet and be kept in the buffer storage 39 during carrying out connection processing with this outside base station 16.
Then, path detection unit 40 is judged whether be connected with the base station 16 of outside (step S809), when receiving with notice that the base station 16 of outside is connected from access net side lower layer handling part 34, indication IP handling part 32 will transmit the destination and be made as base station 16.IP handling part 32 receives this indication, will receive packet and send base station 16 (step S805) to.Under the situation of connection failure,, confirm whether to exist to sending the entry (step S811) of IP address, destination with reference to the routing table (step S810) of oneself preserving.The processing of back from step S810 to step S816 is identical to the processing of step S413 from step S408 with embodiment's 1.
As mentioned above, according to the present invention, when external router apparatus receives the packet of the external terminal devices that sends to external network at the wireless terminal device in local network, even be in and do not have the state that is connected with external network, under the situation that can connect, also connect, preferentially to outside transfer data packets.Like this, when wireless terminal device is being connected with outside networking at selected external router apparatus, just can communicate via this external router apparatus all the time.In this case, because the external router apparatus transfer data packets of other in local network not, so can also alleviate the load of local network inside.
Even under the situation of the order of transposing step S803 of present embodiment and step S804, also can obtain same effect.
(embodiment 3)
Figure 14 is the pie graph of the wireless communication system of present embodiment 3.In Figure 14, possess on home agent apparatus 1401 these aspects different with embodiment 1.
Local networks under external router apparatus 11,12 have carried out when mobile, and external router apparatus 11,12 sends to this home agent apparatus 1401 and is used to login mobile destination-address and the right packet (binding renewal) of home address.If home agent apparatus 1401 with the home address of external router apparatus 11,12 and mobile destination-address to login in cache (binding cache), afterwards, the packet that is sent to home address all utilizes the Ipv6 tunnel to be sent to external router apparatus 11,12 by home agent apparatus 1401.
Below, Figure 12 represents the formation of the external router apparatus of present embodiment.In Figure 12, be: append the mobile IP handling part 1208 that conventional mobile IP such as home agent apparatus 1401 being carried out the position login process handles with the external router apparatus difference of embodiment 1; And when not finishing the position login process of mobile IP as yet, buffer storage 39 temporary transient storages send packets.
Use the motion flow explanation action of the external router apparatus 11,12 of formation as described above of Figure 13.
When the IP handling part 32 of external router apparatus 11 receives packet at the wireless terminal 13 in same local network 1 via lower layer handling part 31 (step S1301), with reference to the IP address, transmission destination (step S1302) that receives packet, confirm whether be (the step S1303) that sends to oneself.Being to send under the situation of oneself, the data division of this reception packet is passed to upper layer handling part 33 (step S1306), be not to send under the situation of oneself, notifies mobile IP handling part 1208.Mobile IP handling part 1208 upgrades tabulation (BU tabulation) (step S1304) with reference to inner binding.Upgrade list memory under situation in binding, notify this information to this IP handling part 32 to the entry of home agent apparatus 1401.IP handling part 32 receives these information, uses reverse tunnel among the mobile IP will receive packet and sends home agent apparatus 1401 to.That is, after will receiving packet and making parcel, transmit to external base station 16 and to receive packets (step S1305).The path of packet of this moment such as Figure 15 listen and show, 16 transmit to external terminal devices 18 via home agent apparatus 1401 from the base station.
On the other hand, upgrade situation about not existing in the tabulation by the 1208 notice bindings of mobile IP handling part under to the entry of home agent apparatus, whether IP handling part 32 is confirmed to exist to sending the entry (step S1308) of IP address, destination with reference to the routing table (step S1307) of oneself preserving.Afterwards until the processing of step S1313 and embodiment 1 identical to the processing of step S413 from step S408.
As mentioned above, according to the present invention, when external router apparatus receives the packet of the external terminal devices that sends to external network at the wireless terminal device in local network, upgrade list memory under situation, preferentially to outside transfer data packets to the entry of home agent apparatus in binding.Like this, when wireless terminal device is being connected with outside networking at selected external router apparatus, can send to external terminal devices to packet via this external router apparatus all the time.In this case, because the external router apparatus transfer data packets of other in local network not, so can also alleviate the load of local network inside.
In addition, even under the situation of the order of transposing step S1303 of present embodiment and step S1304, also can obtain same effect.
As mentioned above, the present invention is useful for the router apparatus of the local network that constitutes by a plurality of wireless terminal devices with a plurality of router apparatus that the communicator that is present in the internet communicates etc., is fit to wireless terminal device and communicates via specific external router apparatus and outside communicator.
Claims (10)
1. router apparatus has:
Carry out connection processing portion with the base station connection processing of external network;
Obtain lower layer information obtaining section with the link information of base station from described connection processing portion; With
The path detection unit, when the wireless terminal device in same local network receives the packet of the communicator that sends to external network, under the situation of being represented be connected with described base station by the obtained link information of described lower layer information obtaining section, this path detection unit is judged to be described base station and transmits the destination; Under the situation that described link information is represented not with described base station is connected, this path detection unit is judged with reference to routing table and is transmitted the destination.
2. router apparatus according to claim 1 is characterized in that,
The connection instruction unit that also has the buffer storage that storage receives data and indicate described connection processing portion to be connected with the base station;
Described lower layer information obtaining section also obtains the link information that whether can be connected with the base station of external network;
When the described path wireless terminal device of detection unit in same local network receives the packet of the communicator that sends to external network, under the situation of representing from the link information of described lower layer information obtaining section not to be connected but can connecting with the base station, to receive packet and be kept in the described buffer storage, and described connection instruction unit indicates described connection processing portion to be connected with the base station; Described connection processing portion finish with being connected of described base station after, the described reception data in the described buffer storage are sent to described base station.
3. router apparatus has:
Carry out the mobile IP handling part of position login in the home agent apparatus in being arranged at the internet; With
The path detection unit, when the wireless terminal device in same local network receives the packet of the communicator that sends to external network, under the situation of existence to the entry of home agent apparatus, this path detection unit is judged to be described home agent apparatus and transmits the destination in the binding renewal tabulation of described mobile IP handling part; Upgrade under the situation about not existing in the tabulation the entry of home agent apparatus in the binding of described mobile IP handling part, this path detection unit is judged with reference to routing table and is transmitted the destination.
According to claim 1 to each described router apparatus of claim 3, it is characterized in that,
Described path detection unit is with reference to during routing table, under the situation of other router apparatus in next forwarding router is same local network, whether the wireless terminal device in the transmission source of inquiry reception packet will receive packet is sent to described next forwarding router.
5. router apparatus according to claim 4 is characterized in that,
Described path detection unit is also replied under the situation of permission at described wireless terminal device, will receive packet and send next forwarding router to, is replying under objectionable situation, the discarded packet that receives.
6. communication means is the communication means of the local network that is made of a plurality of wireless terminal devices and a plurality of router apparatus of being used for communicating with the communicator that is present in the internet, it is characterized in that,
Router apparatus the base station with the local network outside be connected during when receiving packet from the wireless terminal device in the same local network, described reception packet is sent to the base station of the own outside that is being connected, and has nothing to do with the content of routing table.
7. a communication means comprises the steps:
Wireless terminal device in the same local network is sent to the packet of the communicator of external network to router apparatus;
When described router apparatus receives described packet, detect the connection status of the base station of this router apparatus and external network;
With situation that described base station is being connected under, described packet is sent to described base station, not with situation that the base station is connected under, transmit described packet according to routing table.
8. a communication means comprises the steps:
Wireless terminal device in the same local network sends to the packet of the communicator of external network to router apparatus;
Described router apparatus detects the connection status of the base station of this router apparatus and external network when receiving described packet;
With situation that described base station is being connected under, transmit described packet to described base station, not with situation that the base station is connected under, judge the state that router apparatus could be connected with the base station of local network outside, in the time of can connecting, carry out the connection processing with described base station, in the time of can not connecting, transmit described packet according to routing table.
9. communication means is the communication means of the local network that is made of a plurality of wireless terminal devices and a plurality of router apparatus of being used for communicating with the communicator that is present in the internet, it is characterized in that,
Router apparatus upgrades under the situation about existing in the tabulation the entry of home agent apparatus in binding, when the packet that receives from the wireless terminal device in the same local network, use sends described packet to communicator to the reverse tunnel of mobile IP via described home agent apparatus, and irrelevant with the content of routing table.
10. a communication means comprises the steps:
Router apparatus carries out the position login in being arranged at the home agent apparatus of internet;
Wireless terminal device in the same local network is sent to the packet of the communicator of external network to described router apparatus;
Described router apparatus is when receiving described packet, in the binding renewal tabulation of this router apparatus, under the situation of existence to the entry of home agent apparatus, use reverse tunnel to transmit described packet to described communicator via described home agent apparatus to mobile IP; Upgrade under the situation about not existing in the tabulation in described binding, transmit with reference to routing table to the entry of home agent apparatus.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP100018/2003 | 2003-04-03 | ||
| JP2003100018 | 2003-04-03 | ||
| JP103810/2004 | 2004-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1723663A true CN1723663A (en) | 2006-01-18 |
| CN100440857C CN100440857C (en) | 2008-12-03 |
Family
ID=35912906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800017581A Expired - Fee Related CN100440857C (en) | 2003-04-03 | 2004-04-05 | Router device and communication method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100440857C (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6654359B1 (en) * | 1998-12-11 | 2003-11-25 | Lucent Technologies Inc. | Wireless access to packet-based networks |
| JP2002540729A (en) * | 1999-03-31 | 2002-11-26 | ブリティッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー | How to route data |
| EP1111874A1 (en) * | 1999-12-20 | 2001-06-27 | Telefonaktiebolaget L M Ericsson | Routing in mobile-IP Ad-Hoc networks |
| JP3534185B2 (en) * | 2000-10-27 | 2004-06-07 | 日本電気株式会社 | Wireless communication system and communication method thereof |
| SG138435A1 (en) * | 2001-07-17 | 2008-01-28 | Mitsubishi Materials Corp | Communication system, mobile unit database server, mobile radio router, charging method, and vehicle mounted router and agent server therewith |
-
2004
- 2004-04-05 CN CNB2004800017581A patent/CN100440857C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN100440857C (en) | 2008-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2022201198B2 (en) | Connectivity to a local area network via a cellular radio access technology | |
| US6947483B2 (en) | Method, apparatus, and system for managing data compression in a wireless network | |
| KR101717892B1 (en) | Unification sublayer for multi-connection communication | |
| US9532390B2 (en) | Method, apparatus and system for implementing PDN connections | |
| US11102689B2 (en) | Packet data connections in a wireless communication system using a wireless local area network | |
| KR101299308B1 (en) | Selective bearer establishment in evolved universal terrestrial radio access (e-utra) and evolved packet system (eps) | |
| WO2019137473A1 (en) | Communication method and device | |
| ES2880008T3 (en) | Data Carrier Pooling for Carrier Pooling | |
| US8693502B2 (en) | Method, system and terminal for accessing packet data serving node | |
| US10440602B2 (en) | System and method for data forwarding in a communications system | |
| WO2016119754A1 (en) | Providing wireless services | |
| JP2010541495A (en) | Media access control header format | |
| EP2901732B1 (en) | Mechanism for establishing packet data network connection with multiple ip addresses | |
| EP3840448B1 (en) | Wireless communication method and communication device | |
| CN1487707A (en) | Communication apparatus, communication system and communication method | |
| CN103339983A (en) | Data transmission method, apparatus, terminal and base station | |
| CN1181655C (en) | Data packet transmission method in mobile IP | |
| JP4778371B2 (en) | Wireless communication system, wireless base station, communication control method, and communication control program | |
| CN1848798A (en) | IP data stream guiding system and method based on business trigging | |
| CN1723663A (en) | Router device and communication method | |
| CN1442962A (en) | Communication system, communication method, network management and transmission device | |
| CN1306775C (en) | Mobile node, mobile communication system, communication control method and access router | |
| JP4120607B2 (en) | Router device and communication method | |
| JP3979255B2 (en) | External connection router switching method, switching source external connection router and switching destination external connection router | |
| CN1878105A (en) | Method and system for interconnection of WLAN and external network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20180405 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |