CN103999494A - Wireless network system, wireless communication device and program of wireless communication device - Google Patents

Abstract

A wireless network system (10) comprising an edge router (11) and a wireless terminal (12), receives a router advertisement packet sent from a default router of IPv6, obtains the sending source MAC address contained in the router advertisement packet and obtains the IP address corresponding to IPv4 The MAC address corresponding to the IPv4 address of the default router, the first MAC address is compared with the second MAC address, based on the result of judging whether the default router of IPv6 is the same as the default router of IPv4, the edge router (11) is carried out set up.

Description

Wireless network system, wireless communication device and program of wireless communication device

technical field

The invention relates to a wireless network system including a wireless main machine and a wireless slave machine, a wireless communication device and a program of the wireless communication device.

Background technique

The following non-patent documents are known as the standard of 6LoWPAN (IPv6over Low-Power Wireless Personal Area Networks: IPv6-based low-power wireless personal area network). 6LoWPAN enables the utilization of IPv6 over IEEE802.15.4.

In the above-mentioned 6LoWPAN, a plurality of wireless communication methods between external servers and wireless slave devices are provided. When connecting a wireless network composed of a 6LoWPAN-installed wireless terminal sub-unit and a wireless main unit to a home network, it is difficult for the user to set the wireless main unit according to the wireless communication method.

Therefore, the present invention has been made in view of the above-mentioned actual situation, and an object of the present invention is to reduce various setting man-hours for wireless network connection.

Non-Patent Document 1: RFC4944 "Transmission of IPv6 Packets over IEEE802.15.4Networks (6LoWPAN)" ("Transmission of IPv6 Packets over IEEE802.15.4 Networks (6LoWPAN)")

Contents of the invention

The wireless network system according to the first aspect of the present invention includes a wireless master device and a wireless slave device, and the wireless network system is characterized in that it includes: a first MAC address acquisition unit that receives a Router Advertisement packet transmitted from an IPv6 default router, Obtain the sending source MAC address that router advertisement packet comprises; The second MAC address acquisition unit, it obtains the MAC address corresponding to the IPv4 address of the default router (Default Router) of IPv4; Judgment unit, it will be by above-mentioned first MAC address acquisition unit The obtained first MAC address is compared with the second MAC address obtained by the above-mentioned second MAC address obtaining unit, and it is judged whether the above-mentioned IPv6 default router is the same as the above-mentioned IPv4 default router; and a setting unit, based on the above-mentioned judgment The result of the unit is used to perform the settings of the above-mentioned wireless master unit.

With respect to the wireless network system of the above-mentioned first aspect, the wireless network system according to the second aspect of the present invention is characterized in that, in the determination unit, based on the first MAC address acquired by the first MAC address acquisition unit and the first MAC address obtained by the above-mentioned When the second MAC address acquired by the second MAC address acquisition unit matches the second MAC address and it is determined that the IPv6 default router is the same as the IPv4 default router, the setting unit makes the wireless master machine operate as follows: The wireless slave unit wirelessly connected to the wireless master unit performs communication settings to relay packets transmitted and received by the wireless slave unit.

With respect to the wireless network system of the above-mentioned first aspect, the wireless network system according to the third aspect of the present invention is characterized in that, in the determination unit, based on the first MAC address acquired by the first MAC address acquisition unit and the first MAC address obtained by the above-mentioned When the second MAC address obtained by the second MAC address acquisition unit is inconsistent and it is determined that the IPv6 default router is different from the IPv4 default router, the setting unit makes the wireless master machine operate in the following manner: The communication setting of the wireless slave unit wirelessly connected to the wireless master unit relays packets transmitted and received by the wireless slave unit.

With respect to the wireless network system of the above-mentioned first aspect, the wireless network system according to the fourth aspect of the present invention is characterized in that, after the judging unit judges that no router advertisement packet is received after the router solicitation packet is transmitted, only IPv4 In the case of connectivity, the setting unit operates the wireless main machine as a router to form a tunnel with the IPv6overIPv4 tunnel router.

With respect to the wireless network system of the above-mentioned third aspect, the wireless network system according to the fifth aspect of the present invention is characterized in that the setting unit sets the wireless master device to cut off the communication from the upper network to the wireless slave device. For the sent ICMPv6 packet, the above-mentioned wireless sub-machine responds to the sending source of the above-mentioned ICMPv6 packet.

With respect to the wireless network system of the second aspect, the wireless network system according to the sixth aspect of the present invention is characterized in that the setting unit sets a value obtained by changing the network prefix of the received router advertisement packet. It is the network prefix of the wireless network including the above wireless master.

A wireless communication device according to a seventh aspect of the present invention performs wireless communication with a wireless slave, and the wireless communication device includes a first MAC address acquisition unit that receives a router advertisement transmitted from an IPv6 default router. package, to obtain the sending source MAC address contained in the router advertisement packet; the second MAC address obtaining unit, which obtains the MAC address corresponding to the IPv4 address of the default router of IPv4; the judging unit, which will be obtained by the above-mentioned first MAC address obtaining unit The first MAC address of the first MAC address is compared with the second MAC address obtained by the second MAC address obtaining unit to determine whether the default router of the above-mentioned IPv6 is the same as the default router of the above-mentioned IPv4; and the setting unit, which is based on the above-mentioned judging unit As a result, make your own communication settings.

A program for a wireless communication device according to an eighth aspect of the present invention is a program for a wireless communication device that performs wireless communication with a wireless slave device, and the program is for causing a computer of the wireless communication device to function as the following means: the first A MAC address obtaining unit, which receives the router advertisement packet sent from the default router of IPv6, obtains the sending source MAC address contained in the router advertisement packet; the second MAC address obtaining unit, which obtains the MAC corresponding to the IPv4 address of the default router of IPv4 address; a judging unit, which compares the first MAC address obtained by the first MAC address obtaining unit with the second MAC address obtained by the second MAC address obtaining unit, and judges the default router of the above-mentioned IPv6 and the above-mentioned IPv4 whether the default routers are the same; and a setting unit, which performs its own communication setting based on the result of the judging unit.

Description of drawings

FIG. 1 is a schematic diagram showing a system configuration including a wireless network system shown as an embodiment of the present invention.

Fig. 2 is a diagram showing the contents of an IPv6 address, (a) showing the basic structure, (b) showing the format of the global unicast address, and (c) showing the contents of the subnet prefix.

FIG. 3 is a schematic diagram illustrating a prefix delegation method applied to a wireless network system shown as an embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating another prefix delegation method applied to the wireless network system shown as an embodiment of the present invention.

FIG. 5 is a schematic diagram illustrating a route of a prefix delegated from an ISP edge router.

Figure 6 is a schematic diagram illustrating alternative paths for prefixes delegated from an ISP edge router.

7 is a schematic diagram showing a system configuration when an edge router operates as a router in the wireless network system shown as an embodiment of the present invention.

8 is a sequence diagram when an edge router operates as a router in the wireless network system shown as the embodiment of the present invention.

9 is a schematic diagram showing a system configuration when an edge router operates as a bridge in the wireless network system shown as an embodiment of the present invention.

FIG. 10 is a sequence diagram when an edge router operates as a bridge in the wireless network system shown as the embodiment of the present invention.

FIG. 11 is a schematic diagram showing a system configuration for setting up an IPv6overIPv4 tunnel in a wireless network system shown as an embodiment of the present invention.

Fig. 12 is a sequence diagram when an IPv6overIPv4 tunnel is set and operated in the wireless network system shown as the embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings.

A wireless network system 10 shown as an embodiment of the present invention is configured, for example, as shown in FIG. 1 .

This wireless network system 10 uses, for example, 6LoWPAN as a basic technology. The wireless network system 10 includes an edge router 11 as a wireless master (wireless communication device) and a wireless terminal 12 as a wireless slave. In the wireless network system 10 , wireless communication is performed between an edge router 11 and one or more wireless terminals 12 .

The wireless network system 10 is included in the user's home network 1 . A user's home network 1 includes a wireless network system 10 and a home BB (broadband: broadband) router 2 . The home BB router 2 is a router used when connecting to the Internet in a home or the like through a high-speed line such as an optical fiber line. The home BB router 2 has, for example, an Ethernet (registered trademark) port as a port on the WAN (Wide Area Network: Wide Area Network) side. In addition, the in-home BB router 2 has an Ethernet (registered trademark) port, a serial port, and the like on the LAN (Local Area Network: local area network) (in-home) side. In this wireless network system 10, the home BB router 2 and the edge router 11 exchange information via an Ethernet (registered trademark) line or a serial line.

The BB router 2 in the home is connected to the IP network NW which is a WAN. Devices to be communicated with by the wireless terminal 12 are included in the IP network NW. In this embodiment, the communication partners of the wireless terminal 12 include PC4 and ISP (Internet Services Provider: Internet Service Provider) server 6. PC4 is connected to IP network NW via router 3 . The ISP server 6 is connected to the IP network NW via the ISP edge router 5 .

The wireless network system 10 normally operates the edge router 11 as a wireless master device as an IPv6 (Internet Protocol Version 6: Internet Protocol Version 6) router. The wireless terminal 12 as a wireless slave sends a router solicitation (RS, Router Solicitation) packet. The edge router 11 sends a Router Advertisement (RA, Router Advertisement) packet for the RS packet. When the wireless terminal 12 receives the RA packet, it generates a 128-bit long IPv6 global unicast address. The wireless terminal 12 combines the IPv6 network prefix (network prefix) included in the RA packet with the address obtained by extending its own MAC (Media Access Control: Media Access Control) address into the EUI-64 format. Thus, the wireless terminal 12 generates a 128-bit long IPv6 global unicast address. The wireless terminal 12 sets the generated IPv6 global unicast address as its own wireless network interface. This IPv6 global unicast address includes, for example, a subnetwork prefix (n bits) which is an IPv6 network prefix and an interface identifier as shown in (a) of FIG. 2 . In addition, as shown in (b) of FIG. 2 , the subnetwork prefix includes a global routing prefix and a subnetwork identifier. The subnet identifier is a code for distinguishing from other wireless network systems 10 . And, a global routing prefix is defined as shown in (c) of FIG. 2 . In addition, (a) and (b) of FIG. 2 refer to http://www.nic.ad.jp/ja/newsletter/No32/090.html. (c) of FIG. 2 refers to http://itpro.nikkeibp.co.jp/article/COLUMN/20070925/282722/.

In the wireless network system 10 , all the wireless terminals 12 capable of communicating with the edge router 11 perform setting of the IPv6 global unicast address corresponding to the RA packet. Generally, a 64-bit prefix is distributed within the same link as RA packets. Therefore, the wireless network system 10 is defined as a network having a 64-bit long network address.

In such a wireless network system 10, when the wireless terminal 12 intends to transmit data to the PC 4 or the ISP server 6, the wireless terminal 12 transmits a communication packet including the data. This communication packet is received by the edge router 11 . The edge router 11 refers to the destination address of the communication packet, determines that it is a communication packet destined for the IP network NW, and sends it to the in-home BB router 2 . Thereby, the packet generated by the wireless terminal 12 is transmitted to the PC 4 and the ISP server 6 via the home BB router 2 and the IP network NW. On the other hand, the communication packets sent from the PC 4 and the ISP server 6 to the wireless terminal 12 are sent to the edge router 11 via the in-home BB router 2 . The edge router 11 refers to the destination address of the received communication packet, determines that it is a communication packet addressed to the wireless terminal 12 as its own wireless slave, and wirelessly transmits it. Thus, the wireless terminal 12 can receive the communication packets transmitted from the PC 4 and the ISP server 6 .

In the main IPv6 network service, the prefix delegation method of the wireless terminal 12 in the user's home network 1 is, for example, as shown in FIG. 3 or FIG. 4 . In these prefix delegation methods, the PD (Prefix Delegation: prefix proxy) option (DHCPv6-PD) of DHCPv6 (Dynamic Host Configuration Protocol version 6: Dynamic Host Configuration Protocol version 6) is used from the ISP edge router 5 .

In the prefix delegation method in FIG. 3 , a prefix of 48 to 56 bits is delegated to the home BB router (hereinafter also referred to as BBR) 2 . And, the home BB router 2 assigns an IPv4 address by DHCP or PPPoE, and operates as a NAT router between the home LAN and WAN. Thereby, the home BB router 2 functions as the IPv6 router 2A including the functions of both the IPv6 default router and the IPv4 default router in the user's home network 1 . The IPv6 router 2A enables construction of a plurality of wireless network systems 10 as subnets. For example, RA packets are transmitted to the television 12a and the personal computer 12b in FIG. 3 . At this time, the home BB router 2A sets the subnet identifiers (ID) shown in (b) and (c) of FIG. 2 to different values. Thereby, the IPv6 network prefix becomes a different value, and the television 12a and the personal computer 12b belong to different subnets. In addition, the in-home BB router 2A can also transmit RA packets to the edge router 11 shown in FIG. 1 to make it construct the wireless network system 10 as a sub-network.

In the prefix delegation method shown in FIG. 4 , an RA packet is directly sent from the ISP edge router 5 to the television 12 a and the personal computer 12 b which are devices in the user's home network 1 . The RA packet includes an IPv6 network prefix (64 bits). Thus, the ISP edge router 5 directly assigns IPv6 global unicast addresses to the television 12a and the personal computer 12b. In addition, in this prefix delegation method, the home BB router 2 is not an IPv6 default router in the user's home network 1, but functions as an IPv6 bridge 2B including the function of an IPv4 default router.

When the wireless network system 10 using 6LoWPAN is connected to the user's home network 1 by the prefix delegation method shown in FIG. 3 , the wireless network system 10 is placed under the IPv6 router 2A as shown in FIG. 5 . Here, the network address of the wireless network system 10 needs to select a prefix that does not overlap with the network addresses of other subnetworks under the IPv6 router 2A among the prefixes delegated from the ISP edge router 5 . Therefore, the edge router 11 needs to function as a router that sets the network prefix of the wireless network system 10 and sets an IPv6 global unicast address for the wireless terminal 12 . That is, the edge router 11 causes its own edge router 11 to operate so as to perform communication settings for the wireless terminal 12 that can be wirelessly connected to the edge router 11 . This communication setting is address setting processing for the wireless terminal 12, rewriting processing of the MAC address at the time of relaying, and the like. The edge router 11 relays packets transmitted and received by the wireless terminals 12 for which communication settings have been made.

When the wireless network system 10 is connected to the user's home network 1 by the prefix delegation method shown in FIG. 4 , the wireless network system 10 is connected to the ISP edge router 5 via the IPv6 bridge 2B as shown in FIG. 6 . The wireless network system 10 receives the RA packet transmitted from the ISP edge router 5 via the IPv6 bridge 2B. This RA packet is sent to the edge router 11 by multicast. As shown in FIG. 6 , generally speaking, the network prefix of the RA packet is 64 bits long, and it is assumed that only the wireless network system 10 exists in the sub-network in the home. Therefore, the edge router 11 as a wireless master needs to function as a bridge for IPv6 packets similarly to the in-home BB router 2 . That is, the edge router 11 operates its own edge router 11 to relay packets transmitted and received by the wireless terminal 12 without setting up communication with the wireless terminal 12 wirelessly connectable to the edge router 11 .

Even if there is such a difference in the prefix delegation method, the wireless network system 10 according to the present embodiment automatically configures the edge router 11 to configure an IPv6 global unicast address for the wireless terminal 12 . Therefore, the wireless network system 10 detects the prefix delegation method, and automatically performs various settings of the edge router 11 according to the detected prefix delegation method. This operation will be described below.

First, the setting operation of the edge router 11 in the prefix delegation method in which the ISP edge router 5 delegates a prefix to the home BB router 2 as shown in FIG. 5 will be described. The setting operation of the edge router 11 will be described with reference to FIG. 7 and FIG. 8 .

As shown in FIG. 7 , the home BB router 2 functions as an IPv6 router 2A. In FIG. 8, the IPv6 router 2A is described as BBR. In addition, it is assumed that the ISP edge router 5 includes a DHCPv6 server 5a.

First, as shown in FIG. 8, the ISP edge router 5 and the home BB router 2 use PPPoE (PPPover Ethernet: Ethernet-based Point-to-Point Protocol (registered trademark)) to perform user authentication and establish a communication link session.

After establishing this PPPoE-based communication link, the in-home BB router 2 moves to the stage of DHCPv6-PD-based prefix delegation. First, the in-home BB router 2 transmits a Solicit (request) message S1 to a multicast address destined for all DHCP servers for the PPP link.

When receiving the Solicit message S1, the DHCPv6 server 5a sends an Advertise message S2. Thus, the DHCPv6 server 5 a notifies the home BB router 2 that the DHCP service can be used.

Next, the in-home BB router 2 transmits a Request (request) message S3 specifying a PD option to the DHCPv6 server 5a in order to request the delegated prefix. The DHCPv6 server 5a assigns the IPv6 network prefix to the BB router 2 in the home according to the received Request message S3. At this time, the DHCPv6 server 5 a statically assigns a predetermined prefix to the user of the home BB router 2 . Alternatively, the DHCPv6 server 5a dynamically allocates a prefix that can be used when the Request message S3 is received. This IPv6 network prefix S4 is sent to the in-home BB router 2 by the DHCPv6 server 5a.

In this example, as shown in FIG. 7 , 2001:db8:100::/48 is assigned to the user's home network 1 of the home BB router 2 . The BB router 2 in the home uses 2001:db8:100:1::/64 from 2001:db8:100::/48 as the user's home network 1 to advertise the RA packet. In addition, the BB router 2 in the home assigns 2001:db8:100:1::1 as the interface on the user's home network 1 side.

When the edge router 11 is connected to the user's home network 1, it transmits the RS packet S5 by multicast to all routers. In response, the home BB router 2 that is the IPv6 default router transmits an RA packet S6 including an IPv6 network prefix of 2001:db8:100:1::/64. The RA packet S6 is received by the edge router 11 . The edge router 11 acquires the source MAC address included in the RA packet S6 as the first MAC address (first MAC address acquisition means).

Next, the BB router 2 in the home uses DHCP to obtain its own IPv4 address and the address of the default router. First, the edge router 11 sends a DHCP Discovery (discovery) message S7. Accordingly, the edge router 11 receives a DHCP Offer message S8 from the in-home BB router 2 serving as the default router. Next, the edge router 11 sends a DHCP Request message S9. Accordingly, the edge router 11 can receive the DHCP Ack (response) message S10 from the in-home BB router 2 . In this embodiment, the default router is the home BB router 2, and the edge router 11 obtains the source MAC address of the DHCP Ack message S10 as the second MAC address. Thereby, the edge router 11 can acquire the MAC address corresponding to the IPv4 address of the IPv4 default router (second MAC address acquisition means).

Next, the edge router 11 compares the first MAC address obtained from the RA packet S6 with the second MAC address obtained from the Ack message S10. According to whether the first MAC address is consistent with the second MAC address, the edge router 11 judges whether the IPv6 default router is the same as the IPv4 default router (judging unit). The edge router 11 automatically sets whether it should function as the IPv6 router 2A or should function as the IPv6 bridge 2B based on the judgment result (setting means).

Thus, the edge router 11 can easily detect the prefix delegation method for the user's home network 1 located at the upper level of the wireless network system 10 . This prefix delegation method can be used in the setting of the edge router 11 as follows.

The first MAC address is the MAC address of the home BB router 2 included in the RA packet S6, and the second MAC address is the MAC address of the home BB router 2 included in the Ack message S10. Therefore, the first MAC address is the same as the second MAC address, and the edge router 11 can determine that the IPv6 default router is the same as the IPv4 default router. The edge router 11 determines that the ISP edge router 5 has delegated a prefix to the in-home BB router 2 through DHCP-PD. As a result, the edge router 11 operates itself as the IPv6 router 2A. For this purpose, the edge router 11 performs setting of transfer of communication packets and setting of the in-home BB router 2 as a default router.

Thereby, the edge router 11 can automatically set the setting of the edge router 11 itself as a router based on the determined prefix delegation method.

In addition, it is desirable that the edge router 11 sets a value obtained by changing the network prefix of the RA packet S6 received from the in-home BB router 2 as the network prefix of the wireless network system 10 including itself. The edge router 11 sets, for example, a value obtained by incrementing the network prefix of the RA packet S6 by 1 as the network prefix of the wireless network system 10 . Specifically, the edge router 11 adds 1 to the prefix 2001:db8:100:1::/64 of the user's home network 1 to set 2001:db8:100:2::/64 as the prefix of the wireless network system 10 . The edge router 11 sends the RA packet including the 2001:db8:100:2::/64 to the wireless terminal 12 of the wireless network system 10 . In addition, the edge router 11 assigns 2001:db8:100:2::/64 as an interface on the wireless network system 10 side as shown in FIG. 7 .

The wireless terminal 12 sets an IPv6 global unicast address including 2001:db8:100:2::/64 as an IPv6 network prefix. This 2001:db8:100:2::/64 wireless network system 10 is included in the range of the IPv6 network prefix (2001:db8:100::/48) assigned to the in-home BB router 2 . Therefore, the wireless terminal 12 can communicate with the IP network NW outside the home via the edge router 11 and the in-home BB router 2 . In this way, the edge router 11 can automatically assign the prefix of the wireless network system 10 from the network prefix of the upper network of the edge router 11 .

Next, the setting operation of the edge router 11 in the prefix delegation method in which the ISP edge router 5 delegates a prefix to each device in the user's home network 1 as shown in FIG. 6 will be described. The setting operation of the edge router 11 will be described with reference to FIGS. 9 and 10 .

As shown in FIG. 9 , the home BB router 2 functions as an IPv6 router 2A. In FIG. 8, the IPv6 router 2A is described as BBR. In addition, it is assumed that the ISP edge router 5 includes a DHCPv6 server 5a.

First, as shown in FIG. 8, the ISP edge router 5 and the home BB router 2 use PPPoE (PPPover Ethernet (registered trademark)) to perform user authentication and establish a communication link session. In this prefix delegation method, the in-home BB router 2 operates as a bridge that relays only IPv6 packets.

After this PPPoE-based communication link is established, the RS packet transmitted from the user's in-house network 1 is transmitted to the ISP edge router 5 by the in-home BB router 2 serving as the IPv6 bridge 2B. Correspondingly, the ISP edge router 5 sends the RA packet to the user's home network 1 .

The television 12a and the personal computer 12b directly receive the RA packet transmitted from the ISP edge router 5 . The RA packet contains 2001:db8:100:1::/64 as the IPv6 network prefix. The edge router 11 sets an IPv6 address by combining the received IPv6 network prefix and an address obtained by extending its own MAC address into the EUI-64 format.

Similarly, when the edge router 11 is connected to the user's in-house network 1, it transmits the RS packet S21 by multicast to all routers. This RS packet S21 receives an RA packet including prefix information of 2001:db8:100:1::/64 from the ISP edge router 5 which is the IPv6 default router. The edge router 11 acquires the source address contained in the RA packet S22 as the first MAC address (first MAC address acquisition means).

Next, the BB router 2 in the home uses DHCP to obtain its own IPv4 address and the address of the default router. First, the edge router 11 sends a DHCP Discovery message S23. Correspondingly, the edge router 11 receives a DHCP Offer message S24 from the in-home BB router 2 as the default router. Next, the edge router 11 sends a DHCP Request message S25. Accordingly, the edge router 11 can receive the DHCP Ack message S26 from the in-home BB router 2 . In this embodiment, the default router is the home BB router 2, and the edge router 11 acquires the source MAC address of the DHCP Ack message S26 as the second MAC address. Thereby, the edge router 11 can acquire the MAC address corresponding to the IPv4 address of the IPv4 default router (second MAC address acquisition means).

Next, the edge router 11 compares the first MAC address obtained from the RA packet S22 with the second MAC address obtained from the Ack message S26. Thus, the edge router 11 judges whether or not the IPv6 default router is the same as the IPv4 default router (judgment means). The edge router 11 automatically sets whether it should function as the IPv6 router 2A or should function as the IPv6 bridge 2B based on the judgment result (setting means).

Thus, the edge router 11 can easily detect the prefix delegation method for the user's home network 1 located at the upper level of the wireless network system 10 . This prefix delegation method can be used in the setting of the edge router 11 as follows.

The first MAC address is the MAC address of the ISP edge router 5 included in the RA packet S22, and the second MAC address is the MAC address of the in-home BB router 2 included in the Ack message S26. Therefore, the first MAC address and the second MAC address in the edge router 11 are different, and the edge router 11 can determine that the default router for IPv6 is different from the default router for IPv4. The edge router 11 judges that the setting is that the prefix is directly delegated to the wireless terminal 12 and the like through the RA packet from the ISP edge router 5 . As a result, the edge router 11 operates itself as the IPv6 bridge 2B. For this reason, the edge router 11 is set to transparently transmit all packets between the interfaces on the wired side and the wireless side. Thereby, the edge router 11 can automatically set the setting of the edge router 11 itself as a bridge based on the determined prefix delegation method.

As a result, as shown in FIG. 9 , in the wireless network system 10 , the same IPv6 network prefix as that of the television 12 a and the like is distributed.

And, it is expected that the edge router 11 cuts off the ICMPv6 (Internet Control Message Protocol Version 6: Internet Control Message Protocol sixth edition) packet S31 sent from the upper-level network to the wireless terminal 12 as shown in FIG. The source of S31 responds. Examples of the ICMPv6 packet S31 include packets such as ECHO Request (Echo Request) and Neighbor Solicitation (Neighbor Solicitation) sent from an IP network NW such as the Internet to the wireless terminal 12. When the edge router 11 receives such an IPv6 packet S31, the edge router 11 responds instead of the wireless terminal 12, and returns the ICMPv6 packet S32 to the source. Thus, the edge router 11 reduces the amount of packets in the wireless network system 10 . As a result, the power consumption of the wireless terminal 12 can be reduced, and the battery life of the wireless terminal 12 can be expected to increase.

And, in above-mentioned embodiment, under the situation that does not have the connectivity of IPv6, it is desirable that, as shown in Figure 11, construct IPv6overIPv4 tunnel between edge router 11 and IPv6overIPv4 (IPv6 traverses IPv4) tunnel router 21 to communicate.

Assume that the edge router 11 does not respond within a preset predetermined time after transmitting the RS packet S41 to the user's home network 1 as shown in FIG. 12 , and times out. In this case, the edge router 11 judges that the connectivity in the user's home network 1 is only IPv4. Correspondingly, an IPv6overIPv4 tunnel link is established between the edge router 11 and the IPv6overIPv4 tunnel router 21 .

After establishing the link of the IPv6overIPv4 tunnel, the edge router 11 sends the RS packet S42 again, and receives the RA packet S43 as a response to the RS packet S41. Thereby, the edge router 11 can obtain the first MAC address by receiving the RA packet, and obtain the second MAC address by DHCP, as described in FIGS. 8 and 10 . Thereby, the edge router 11 can determine the prefix delegation method by comparing the addresses, and thereby set itself to operate as a router or as a bridge.

In this way, even in the user's home network 1 with only IPv4 connectivity, the edge router 11 can automatically form an IPv6overIPv4 tunnel with the ISP server 6 based on the result of address comparison to perform communication.

In addition, the above-mentioned embodiment is an example of this invention. Therefore, the present invention is not limited to the above-mentioned embodiments, and it is a matter of course that various changes can be made in accordance with the design and the like as long as the embodiments do not deviate from the scope of the technical concept of the present invention. of.

That is, the above-mentioned setting of the edge router 11 may be executed by a program in the edge router 11 . For example, acquisition of the first MAC address and second MAC address, determination of the home BB router 2 based on address comparison, and setting of the edge router 11 may be performed by a computer in the edge router 11 executing a program.

In addition, acquisition of the first MAC address and the second MAC address, determination of the home BB router 2 based on address comparison, and setting of the edge router 11 may be performed by other devices than the edge router 11 . For example, a setting device capable of communicating with the edge router 11 and the home BB router 2 may be installed in the user's home network 1, and the setting of the edge router 11 may be automatically performed by the setting device.

The entire contents of Japanese Patent Application No. 2011-275293 (filing date: December 16, 2011 ) are incorporated herein.

Industrial availability

According to the present invention, since the wireless master device is set based on the result of comparing the MAC address of the IPv6 default router with the MAC address of the IPv4 default router, various setting man-hours for network connection can be reduced.

Explanation of reference signs

10: wireless network system; 11: edge router (wireless main machine, first MAC address acquisition unit, second MAC address acquisition unit, judgment unit, setting unit); 12: wireless terminal (wireless slave machine).

Claims (8)

1. a Radio Network System, comprises wireless machine tool and radio slave phone, and this Radio Network System is characterised in that to have:

The first MAC Address acquiring unit, it receives the router advertisement bag sending from the default router of IPv6, obtains the transmission source MAC Address that router advertisement bag comprises;

The second MAC Address acquiring unit, it obtains the MAC Address corresponding with the IPv4 address of the default router of IPv4;

Judging unit, it compares the first MAC Address being got by above-mentioned the first MAC Address acquiring unit and the second MAC Address being got by above-mentioned the second MAC Address acquiring unit, judges that whether the default router of above-mentioned IP v6 is identical with the default router of above-mentioned IP v4; And

Setup unit, its result based on above-mentioned judging unit is carried out the setting of above-mentioned wireless machine tool.

2. Radio Network System according to claim 1, is characterized in that,

In the situation that above-mentioned judging unit is identical with the default router of above-mentioned IP v4 according to the consistent default router of above-mentioned IP v6 that is judged as of the first MAC Address being got by above-mentioned the first MAC Address acquiring unit and the second MAC Address being got by above-mentioned the second MAC Address acquiring unit

Above-mentioned setup unit moves above-mentioned wireless machine tool as follows: to communicating with the radio slave phone of these wireless machine tool wireless connections to set, the bag of reception that above-mentioned radio slave phone sends is carried out to relaying.

3. Radio Network System according to claim 1, is characterized in that,

In the situation that above-mentioned judging unit is different with the default router of above-mentioned IP v4 according to the inconsistent default router of above-mentioned IP v6 that is judged as of the first MAC Address being got by above-mentioned the first MAC Address acquiring unit and the second MAC Address being got by above-mentioned the second MAC Address acquiring unit

Above-mentioned setup unit moves above-mentioned wireless machine tool as follows: not carrying out can be with the communication setting of the radio slave phone of these wireless machine tool wireless connections and the bag of reception that above-mentioned radio slave phone sends is carried out to relaying.

4. Radio Network System according to claim 1, is characterized in that,

At above-mentioned judging unit, be judged as after having sent router solicitation bag and do not receive router advertisement bag and only have in internuncial situation of IPv4,

Above-mentioned setup unit makes above-mentioned wireless machine tool move as router, and IPv6overIPv4 tunnel router, is that IPv6 passes through between IPv4 tunnel router and forms tunnel.

5. Radio Network System according to claim 3, is characterized in that,

Above-mentioned setup unit is set above-mentioned wireless machine tool, makes it cut off the ICMPv6 bag sending to above-mentioned radio slave phone from higher level's network, acts on behalf of above-mentioned radio slave phone the transmission source of above-mentioned ICMPv6 bag is replied.

6. Radio Network System according to claim 2, is characterized in that,

The value that above-mentioned setup unit changes gained by the network prefix of the router advertisement bag to received is set as comprising the network prefix of the wireless network of above-mentioned wireless machine tool.

7. a radio communication device, and between radio slave phone, carry out radio communication, this radio communication device is characterised in that to have:

The first MAC Address acquiring unit, it receives the router advertisement bag sending from the default router of IPv6, obtains the transmission source MAC Address that router advertisement bag comprises;

The second MAC Address acquiring unit, it obtains the MAC Address corresponding with the IPv4 address of the default router of IPv4;

Judging unit, it compares the first MAC Address being got by above-mentioned the first MAC Address acquiring unit and the second MAC Address being got by above-mentioned the second MAC Address acquiring unit, judges that whether the default router of above-mentioned IP v6 is identical with the default router of above-mentioned IP v4; And

Setup unit, its result based on above-mentioned judging unit is carried out the communication setting of self.

8. a program for radio communication device, carries out radio communication between this radio communication device and radio slave phone, this program for the computer that makes above-mentioned radio communication device as with lower unit performance function:

The first MAC Address acquiring unit, it receives the router advertisement bag sending from the default router of IPv6, obtains the transmission source MAC Address that router advertisement bag comprises;

The second MAC Address acquiring unit, it obtains the MAC Address corresponding with the IPv4 address of the default router of IPv4;

Judging unit, it compares the first MAC Address being got by above-mentioned the first MAC Address acquiring unit and the second MAC Address being got by above-mentioned the second MAC Address acquiring unit, judges that whether the default router of above-mentioned IP v6 is identical with the default router of above-mentioned IP v4; And

Setup unit, its result based on above-mentioned judging unit is carried out the communication setting of self.