CN102265568A

CN102265568A - Communication method and load equalizer

Info

Publication number: CN102265568A
Application number: CN2011800008864A
Authority: CN
Inventors: 郑若滨
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-06-13
Filing date: 2011-06-13
Publication date: 2011-11-30
Anticipated expiration: 2031-06-13
Also published as: CN102265568B; WO2012171169A1

Abstract

The embodiment of the present invention provides a communication method and a load equalizer, relating to the field of communication. The communication method comprises the steps of: receiving message form user equipment; selecting one IP edge node from Internet protocol IP edge node group providing service for areas to which the user equipment belongs, wherein the IP edge node in the IP edge node group is dynamically adjusted according to the load condition of the IP edge node group, and the adjustment enables the bandwidth provided by the IP edge node group to meet the demand for bandwidth of the areas to which the user equipment belongs; and transmitting the message to the selected IP edge node. The load equalizer comprises a receiver, a selecting module and a transmitter. According to the scheme, the invention enables the demand for the IP edge node bandwidth to be reduced and the utilizing rate of the IP edge node to be increased.

Description

A kind of communication means and load equalizer

Technical field

The present invention relates to the communications field, particularly a kind of communication means and load equalizer.

Background technology

Access network is made up of access node (Access Node), IP (Internet Protocol, Internet protocol) fringe node (Edge Node) and aggregation networks between the two (Aggregation Network).

The existing position of IP fringe node in the network architecture is very high, concentrates deployment IP fringe node to have performance bottleneck, disperses to dispose the IP fringe node and can save the metropolitan area network bandwidth.When disperseing to dispose the IP fringe node, each IP fringe node is the specific region service, and users of specific area communicates by corresponding IP fringe node.For example, IP fringe node 1 is served the residential area, and IP fringe node 2 is served the shopping centre.On daytime, people go to work to the shopping centre, and 2 loads of IP fringe node are very high, and energy consumption is very big, and people from residential area is few, and 1 load of IP fringe node is very low; Evening is just in time opposite, and people come off duty and get back to the residential area, and 1 load of IP fringe node is very high, and energy consumption is big, and people from shopping centre is few, and 2 loads of IP fringe node are very low.In order to satisfy the requirement that evening is served peak value in the residential area, IP fringe node 1 needs higher bandwidth, because residential area people on daytime is less, so the utilance on 1 daytime of IP fringe node is lower; In order to satisfy the requirement that daytime is served peak value in the shopping centre, IP fringe node 2 needs higher bandwidth, because shopping centre people in evening is less, so the utilance in 2 evenings of IP fringe node is lower.Each IP fringe node all needs higher bandwidth like this, causes the period utilance of IP fringe node outside the service peak value of high bandwidth lower.

Summary of the invention

In order to reduce requirement to IP fringe node bandwidth, improve the utilance of IP fringe node, the embodiment of the invention provides a kind of communication means, has reached load equalizer.

The embodiment of the invention provides a kind of communication means on the one hand, comprising:

Reception is from the message of subscriber equipment;

From being to select an IP fringe node the Internet protocol IP fringe node group of described subscriber equipment affiliated area service, wherein, the quantity of the IP fringe node in the described IP fringe node group is dynamically to adjust according to the loading condition of described IP fringe node group, and the bandwidth that described adjustment can make described IP fringe node group provide satisfies the bandwidth demand of described subscriber equipment affiliated area;

Described message is transmitted to the IP fringe node of described selection.

The embodiment of the invention a kind of load equalizer is provided on the other hand, comprising:

Receiver is used to receive the message from subscriber equipment;

Select module, be used for from selecting an IP fringe node for the Internet protocol IP fringe node group of described subscriber equipment affiliated area service, wherein, the quantity of the IP fringe node in the described IP fringe node group is dynamically to adjust according to the loading condition of described IP fringe node group, and the bandwidth that described adjustment can make described IP fringe node group provide satisfies the bandwidth demand of described subscriber equipment affiliated area;

Transmitter is used for described message is transmitted to the IP fringe node of described selection.

The embodiment of the invention provides service by IP fringe node group for users of specific area, and loading condition according to IP fringe node group, adjust the IP fringe node of forming IP fringe node group, thereby it is variable making the bandwidth of IP fringe node group, can improve the bandwidth of IP fringe node group when serving peak value like this by the quantity that increases the IP fringe node, need not improve the bandwidth of single IP fringe node, reduced requirement to IP fringe node bandwidth, period outside the service peak value can reduce the bandwidth of IP fringe node group by the quantity that reduces the IP fringe node, the IP fringe node that reduces can be used to other IP fringe node group services, has improved the utilance of IP fringe node.

Description of drawings

Fig. 1 is the network architecture diagram that the embodiment of the invention provides;

Fig. 2 is the communication means flow chart that the embodiment of the invention provides;

Fig. 3 is the communication interaction figure that the embodiment of the invention provides;

Fig. 4 is the communication interaction figure that the embodiment of the invention provides;

Fig. 5 is the communication interaction figure that the embodiment of the invention provides;

Fig. 6 is the communication interaction figure that the embodiment of the invention provides;

Fig. 7 is the communication interaction figure that the embodiment of the invention provides;

Fig. 8 is the communication interaction figure that the embodiment of the invention provides;

Fig. 9 is the communication interaction figure that the embodiment of the invention provides;

Figure 10 is the communication interaction figure that the embodiment of the invention provides;

Figure 11 is the communication interaction figure that the embodiment of the invention provides;

Figure 12 is the communication interaction figure that the embodiment of the invention provides;

Figure 13 is the communication interaction figure that the embodiment of the invention provides;

Figure 14 is the communication interaction figure that the embodiment of the invention provides;

Figure 15 is the communication interaction figure that the embodiment of the invention provides;

Figure 16 is the communication interaction figure that the embodiment of the invention provides;

Figure 17 is the communication interaction figure that the embodiment of the invention provides;

Figure 18 is the load equalizer structural representation that the embodiment of the invention provides.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.

The technical scheme that the embodiment of the invention provides is applicable to the network architecture shown in Figure 1, and this network architecture comprises: one or more IP fringe node groups, load equalizer and access node.

Wherein, IP fringe node group is also referred to as the virtual IP address fringe node.Each IP fringe node group is the users of specific area service.Each IP fringe node group is made up of at least one IP fringe node, and the quantity of the IP fringe node in the IP fringe node group can dynamically be adjusted.Each IP fringe node group has the address of oneself, be IP address and MAC Address, use the IP address and the MAC Address of its affiliated IP fringe node group during each IP fringe node correspondence with foreign country, it is different with the address of its place IP fringe node group that the address of each IP fringe node can be arranged to, and also can be the address of the IP fringe node group at its place with the address setting of certain IP fringe node.The IP fringe node can be physics BNG (Broadband Network Gateway, wideband network gateway), physics BSG (Broadband Service Gateway, or physics BRAS (Broadband Remote Access Server, BAS Broadband Access Server) etc. the broadband services gateway),, accordingly, IP fringe node group can be the BNG group, BSG group, or BRAS group.

Wherein, load equalizer is used to connect access node and IP fringe node, directly links to each other with the IP fringe node with respect to access node, can reduce the physical interconnections between access node and the IP fringe node like this.Load equalizer is used for sending to the message of IP fringe node group, and by certain strategy, for example the load balancing strategy is selected an IP fringe node from IP fringe node group, and message is sent to this IP fringe node.Load equalizer can be arranged on the aggregation node between access node and the IP fringe node, also can be arranged on the access node, can also be arranged on the IP fringe node with routing function.

Wherein, users of specific area is passed through corresponding access node access network, and communicates by access node and network equipment.

Based on the above-mentioned network architecture, referring to Fig. 2, the embodiment of the invention provides a kind of communication means on the other hand, and this method specifically can be carried out by load equalizer, comprising:

201: receive message from subscriber equipment.

202: from being to select an IP fringe node the IP fringe node group of this subscriber equipment affiliated area service, wherein, the quantity of the IP fringe node in the IP fringe node group is dynamically to adjust according to the loading condition of IP fringe node group, and the bandwidth that described adjustment can make IP fringe node group provide satisfies the bandwidth demand of subscriber equipment affiliated area.

203: the IP fringe node that this message is transmitted to this selection.

Can also comprise the step of the quantity of adjusting the IP fringe node in the IP fringe node group in the embodiment of the invention, comprise:

Be load set one upper limit threshold and a lower limit threshold value of this IP fringe node group in advance, if the load of IP fringe node group is more than or equal to this upper limit threshold, then increase the quantity of IP fringe node in this IP fringe node group, if the load of IP fringe node group, then reduces the quantity of IP fringe node in this IP fringe node group less than this lower threshold.

Before the step 202, present embodiment can also comprise: be defined as the step of the IP fringe node group of this subscriber equipment affiliated area service, this step comprises:

The user profile of the subscriber equipment that carries according to this message is determined this subscriber equipment affiliated area, according to this subscriber equipment affiliated area, and the zone of the Network Management Equipment that receives transmission reaches the related information for the IP fringe node group of its service, be defined as the IP fringe node group of this subscriber equipment affiliated area service, wherein, the user profile of subscriber equipment can be user side physical port (as circuit ID), IP address, user's MAC address or user vlan information such as (Virtual Local Area Network, VLANs);

Perhaps,

Judge whether the destination address that this message carries is the address information of IP fringe node group, if the IP fringe node group of the address information correspondence of this IP fringe node group that this message is carried is as the IP fringe node group for this subscriber equipment affiliated area service.Wherein, the address information of IP fringe node group can be IP address or MAC Address.

Be defined as the situation of the IP fringe node group of this subscriber equipment affiliated area service for the above-mentioned destination address that carries according to message, before the step 201, present embodiment also comprises:

Be provided as the MAC Address of the IP fringe node group of its affiliated area service to this subscriber equipment as ARP (Address Resolution Protocol, address resolution protocol) agency;

Perhaps,

To send to this subscriber equipment for the IP address of the IP fringe node group of this subscriber equipment affiliated area service.

Step 202 specifically can comprise:

According to the loading condition of each the IP fringe node in this IP fringe node group, from IP fringe node group, select the IP fringe node.A kind of system of selection is that the IP fringe node of load minimum is a plurality of if the IP fringe node of load minimum has in the selection IP fringe node group, can therefrom select an IP fringe node at random.Another kind of system of selection is, select IP fringe node in the IP fringe node group successively according to preset order, when the load of the IP fringe node of selecting during less than default load threshold, select this IP fringe node, promptly keep the IP fringe node of selection constant, when the load of the IP fringe node of selecting during more than or equal to default load threshold, select next IP fringe node in the IP fringe node group according to this preset order, promptly switch the IP fringe node of selecting.Wherein, preset order can be the IP fringe node of the information correspondence of the IP fringe node that issues of Network Management Equipment, also the sequential scheduling of the IP fringe node found by routing protocol message of load equalizer.Wherein, the loading condition of IP fringe node can be that the load equalizer detection obtains, and also can be that the IP fringe node reports load equalizer to obtain.

After the step 202, this example can also comprise:

Set up the mapping table of the IP fringe node of this subscriber equipment and this selection; When the subsequent packet that receives from this subscriber equipment, the user profile of this subscriber equipment that carries according to this subsequent packet finds the IP fringe node of this selection from this mapping table, this subsequent packet also is transmitted to the IP fringe node of this selection.

Step 203 specifically can comprise:

Tunnel encapsulation for this message adds the IP fringe node that leads to this selection is transmitted to this IP fringe node with this message after the encapsulation;

Perhaps, the target MAC (Media Access Control) address of this message is the MAC Address of this IP fringe node group, and the target MAC (Media Access Control) address of this message is converted to the MAC Address of the IP fringe node of this selection, this message after the conversion is transmitted to the IP fringe node of this selection;

Perhaps, the purpose IP address of this message is the IP address of this IP fringe node group, is the IP address of the IP fringe node of this selection with the purpose IP address transition of this message, this message after the conversion is transmitted to the IP fringe node of this selection.

Wherein, the acquisition methods of the IP address of IP fringe node and MAC Address is with reference to the acquisition methods of the nodal information of above-mentioned IP fringe node.

The embodiment of the invention can comprise that IP session shown in Figure 3 sets up process:

301: subscriber equipment k reaches the standard grade, and initiates broadcasting DHCP Discover (address assignment discovery) message, starts the IP address assignment flow process.

302: load equalizer carries out DHCP intercepts, obtain the user profile of subscriber equipment k according to the broadcasting DHCP Discover message that listens to, determine subscriber equipment k affiliated area according to user profile, according to this subscriber equipment k affiliated area, and the zone of the Network Management Equipment that receives transmission reaches the related information for the IP fringe node group of its service, be defined as the IP fringe node group of this subscriber equipment k affiliated area service, from being the IP fringe node of selecting an IP fringe node (for example IP fringe node n) to serve the IP fringe node group of subscriber equipment k affiliated area service as this user, obtain the nodal information of this IP fringe node, set up the mapping table of subscriber equipment and this IP fringe node, as shown in table 1, the IP address of the subscriber equipment k in the table 1 is determined as yet at this moment.

Wherein, the user profile of subscriber equipment k comprises: user side physical port (as circuit ID) and/or user's MAC address optionally also have user vlan.

Wherein, the nodal information of IP fringe node comprises: the IP address (being made as IPn) of IP fringe node, MAC Address (being made as MACn) and network side physical port, the address information (as IP address and MAC Address) of IP fringe node group under the IP fringe node in addition.

The mapping table of table 1 subscriber equipment and IP fringe node

Further, the mapping table of present embodiment can also be set up after load equalizer receives DHCP Request (address assignment request) message.

303: alternatively, load equalizer adds the tunnel encapsulation of leading to IP fringe node n according to the IP fringe node n that selects for DHCP Discover message.

Tunnel encapsulation method specifically comprises: for the ethernet frame at DHCP Discover message place adds corresponding VLAN sign, or be the corresponding MPLS frame head of ethernet frame interpolation at DHCP Discover message place, or be that DHCP Discover message adding purpose address is that IPn, source address are the IP heading of load equalizer address.

304: the DHCP Discover message after load equalizer will encapsulate sends to IP fringe node n.

After 305:IP fringe node n receives DHCP Discover message after the encapsulation, remove tunnel encapsulation.

306:IP fringe node n sends to aaa server with subscriber's line ID entrained in the DHCP Discover message by aaa protocol message and carries out authentification of user.

Wherein, aaa protocol message can be radius (radius) protocol message.

307: after authentification of user passed through, IP fringe node n was relayed to Dynamic Host Configuration Protocol server with DHCP Discover message.

The 308:DHCP server is replied DHCP Offer (the address assignment service is confirmed) message to IP fringe node n, and it is subscriber equipment k IP address allocated (being assumed to be IPk) that this message is carried Dynamic Host Configuration Protocol server.

309:IP fringe node n is carried at the IP address of the IP fringe node group under the IP fringe node n in the above-mentioned DHCPOffer message and sends to load equalizer.

In this step, suppose that IP fringe node n knows the address of the IP fringe node group that it is affiliated, load equalizer adopts the tunnel to link to each other with the IP fringe node, aggregation node between load equalizer and the IP fringe node need not be learnt user's MAC Address like this, avoids the aggregation node autgmentability and the complexity issue that cause because of MAC Address quantity.

310: the DHCP Offer message that load equalizer will carry the IP address of IP fringe node group sends to subscriber equipment k.

311: subscriber equipment k initiates broadcasting DHCP Request (address assignment request) message.

312: load equalizer carries out DHCP intercepts, obtain the user profile of subscriber equipment k according to the broadcasting DHCP Request message that listens to, search the mapping table of subscriber equipment and IP fringe node according to the user profile of subscriber equipment k and determine IP fringe node n, add the tunnel encapsulation of leading to IP fringe node n for this DHCP request message.

313: the DHCP Request message after load equalizer will encapsulate sends to IP fringe node n.

After 314:IP fringe node n receives DHCP Discover message after the encapsulation, remove tunnel encapsulation.

315:IP fringe node n is relayed to Dynamic Host Configuration Protocol server with DHCP Discover message.

The 316:DHCP server is replied DHCP Ack (address assignment affirmation) message to IP fringe node n, and it is subscriber equipment k IP address allocated (being IPk) that this message is carried Dynamic Host Configuration Protocol server.

317:IP fringe node n is carried at the IP address of the IP fringe node group under the IP fringe node n in the above-mentioned DHCP Ack message and sends to load equalizer.

318: load equalizer is DHCP and is intercepted, obtain distributing to the IP address of subscriber equipment k according to the DHCP Ack message that listens to, with for the IP address ip k of user equipment allocation adds in the user profile of subscriber equipment in the mapping table, the IP address of subscriber equipment k is IPk in the mapping table shown in this moment table 1.

319: the DHCP Ack message that load equalizer will carry IP fringe node group address sends to subscriber equipment k.

The embodiment of the invention can comprise IP session keepalive process shown in Figure 4; by BFD (Bidirectional Forwarding Detection; two-way forwarding detection) agreement is carried out the IP session keepalive; receive the other side's BFD message at the appointed time each other when user and IP fringe node, illustrate that the IP session is normal.

401: when carrying out the IP session keepalive between subscriber equipment k and the IP fringe node group, subscriber equipment k initiates BFD message, and destination address is the IP address of IP fringe node group.

402: load equalizer is searched the mapping table of subscriber equipment k and IP fringe node and is determined IP fringe node n according to the user profile of the subscriber equipment k that initiates BFD message, adds the tunnel encapsulation of leading to IP fringe node n for BFD message.

Wherein, user profile can be user's MAC address, IP address, user side physical port (as circuit ID) or user vlan.

403:IP fringe node n receives the BFD message after the encapsulation, removes tunnel encapsulation and obtains BFD message.

404:IP fringe node n initiates BFD message, and source address is the IP address of IP fringe node group, and destination address is the IP address ip k of subscriber equipment k, adds the tunnel encapsulation of leading to load equalizer for BFD message.

405: load equalizer receives the BFD message after the encapsulation, is given to subscriber equipment k after the removal tunnel encapsulation.

406: subscriber equipment k receives BFD message.

The present invention can be used for IP session repeating process shown in Figure 5; step 501-513 is an IP session repeating process, and wherein, step 501-508 also can realize the IP session keepalive; receive the other side's ARP message at the appointed time each other when user and IP fringe node, illustrate that the IP session is normal.

501: subscriber equipment k initiates ARP request (arp request) message, and this message is carried IP address ip s, with the MAC Address of request IPs correspondence.

Need to prove that when step 501 was used for the IP session keepalive, IPs represented the IP address of IP fringe node group, when step 501 was used for IP session forwarding, IPs represented the IP address of Correspondent Node, and wherein, Correspondent Node can be another subscriber equipment.

502: load equalizer is according to the user profile of the subscriber equipment k that initiates ARP request message, and the mapping table of searching subscriber equipment and IP fringe node is defined as the IP fringe node n of subscriber equipment k service.

503: load equalizer is that ARP request message is added the tunnel encapsulation of leading to IP fringe node n.

504:IP fringe node n receives the ARP request message after the encapsulation, removes tunnel encapsulation.

505:IP fringe node n replys ARP reply message with the MAC Address of the IP fringe node group MAC Address as the IPs correspondence, and be that ARP reply message is added the tunnel encapsulation towards load equalizer.

ARP reply message after 506:IP fringe node n will encapsulate sends to load equalizer.

507: load equalizer receives the ARP reply message after the encapsulation, sends to subscriber equipment k after the removal tunnel encapsulation.

508: subscriber equipment k receives ARP reply message, and the MAC Address that obtains the IPs correspondence is the MAC Address of IP fringe node group.

509: subscriber equipment k initiates IPoE (IP over Ethernet, IP is carried on Ethernet) message, and purpose IP address is IPs or broadcast address, and target MAC (Media Access Control) address is IP fringe node group MAC Address or broadcast address.

510: load equalizer is searched the mapping table of subscriber equipment and IP fringe node and is determined IP fringe node n according to the user profile of the subscriber equipment of initiating the IPoE message, adds the tunnel encapsulation of leading to IP fringe node n.

511: the IPoE message after load equalizer will encapsulate is transmitted to IP fringe node n by the tunnel.

512: arrive IP fringe node n for the IPoE message of subscriber equipment k from network side, IP fringe node n sends this IPoE message to load equalizer, and purpose IP address is the IP address of subscriber equipment k, and source MAC is an IP fringe node group MAC Address.

513: load equalizer sends to subscriber equipment k by two layers of forwarding with the IPoE message.

In the embodiment of the invention, the address of the IP fringe node group under the IP fringe node can not need to know, load equalizer carries out the conversion of the address of the address of IP fringe node group and IP fringe node as DHCP Proxy (agency); Load equalizer can change the DHCP relay (relaying) of clean culture as broadcasting; Load equalizer can also adopt the tunnel to link to each other with the IP fringe node, and the aggregation node between load equalizer and the IP fringe node need not be learnt user's MAC Address like this, avoids the aggregation node autgmentability and the complexity issue that cause because of MAC Address quantity.

The embodiment of the invention can comprise that IP session shown in Figure 6 sets up process, and load equalizer adopts the tunnel to link to each other with the IP fringe node, comprising:

601-605: identical with 301-305.

606:IP fringe node n sends to aaa server with subscriber's line ID entrained in the DHCP Discover message by AAA (as radius) protocol message and carries out authentification of user.

607-608: identical with 307-308.

609; IP fringe node n is the IP address that DHCP Offer message is added IP fringe node n.

610: load equalizer is done DHCP proxy, and the IP address of the IP fringe node group under the IP fringe node n sends to the user with DHCPOffer message.

611-616: identical with 311-316.

617:IP fringe node n is given to subscriber equipment k in after DHCP Ack message is added the IP address of IP fringe node n.

618: load equalizer is DHCP and is intercepted, obtain distributing to user's IP address according to the DHCP Ack message that listens to, with for the IP address ip k of user equipment allocation adds in the user profile of subscriber equipment in the mapping table, user device IP address is IPk in the mapping table shown in this moment table 1.

619: load equalizer is done DHCP proxy, is IP fringe node group address under the IP fringe node n with the IP address transition of IP fringe node n in the DHCP Ack message, and DHCP Ack message is sent to subscriber equipment k.

The embodiment of the invention can comprise that IP session shown in Figure 7 sets up process, and load equalizer changes the DHCP relay of clean culture as broadcasting, comprising:

701-702: identical with 601-602.

703: load equalizer is done DHCP relay, is that destination address is the clean culture DHCP Discover message of the MAC Address (being made as MACn) of IP fringe node n with broadcasting DHCP Discover message conversion.

704: load equalizer sends to IP fringe node n with clean culture DHCP Discover message.

705-710: identical with 606-611.

711: load equalizer is that destination address is the clean culture DHCP Request message of the MAC Address MACn of IP fringe node n according to mapping table with broadcasting DHCP Request message conversion.

712: load equalizer sends to IP fringe node n with clean culture DHCP Request message.

713:IP fringe node n sends to Dynamic Host Configuration Protocol server with clean culture DHCP Request message.

The 714:DHCP server sends DHCP Ack message to IP fringe node n, and this message is carried user's IP address allocated IPk.

715:IP fringe node n receives DHCP Ack message, and the IP address for DHCP Ack message is added IP fringe node n sends DHCP Ack message to load equalizer.

716: load equalizer is DHCP and is intercepted, obtain distributing to user device IP address according to the DHCP Ack message that listens to, with for the IP address ip k of user equipment allocation adds in the user profile of subscriber equipment in the mapping table, IP address is IPk in the mapping table shown in this moment table 1.

717: load equalizer is done DHCP proxy, and the IP address with the IP fringe node group under the IP fringe node n is revised as in the IP address of the IP fringe node n in the DHCP Ack message sends to the user with the DHCP Ack message of carrying the IP address of IP fringe node group.

The embodiment of the invention can comprise IP session keepalive process shown in Figure 8, carries out the IP session keepalive by the BFD agreement, receives the other side's BFD message at the appointed time each other when user and IP fringe node, illustrates that the IP session is normal.

801: when carrying out the IP session keepalive between subscriber equipment k and the IP fringe node group, subscriber equipment k initiates BFD message, and destination address is the IP address of IP fringe node group.

802: load equalizer is searched the mapping table of user and IP fringe node according to the user profile of the subscriber equipment of initiating BFD message, obtains corresponding IP fringe node n, the destination address of BFD message is converted to the IP address of IP fringe node n.

803: load equalizer sends to IP fringe node n with BFD message.

804:IP fringe node n initiates BFD message after receiving BFD message, and source address is the IP address of IP fringe node n, and destination address is the IP address ip k of subscriber equipment k.

805: load equalizer carries out source address conversion, the source address of BFD message is converted to the IP address of the IP fringe node group under the IP fringe node n.

806: load equalizer is given subscriber equipment k with the BFD forwards.

The embodiment of the invention can comprise IP session repeating process shown in Figure 9; step 901-913 is an IP session repeating process, and wherein, step 901-908 also can realize the IP session keepalive; receive the other side's ARP message at the appointed time each other when user and IP fringe node, illustrate that the IP session is normal.

901-902: identical with 501-502.

903: load equalizer adds the tunnel encapsulation of leading to IP fringe node n, and perhaps, load equalizer is that destination address is the clean culture ARP reply message of the MAC Address of IP fringe node n with broadcast arp reply message conversion.

904-905: identical with 504-505.

906:IP fringe node n replys ARP reply message with the MAC Address of the IP fringe node n MAC Address as the IPs correspondence, and be that ARP reply message is added the tunnel encapsulation towards load equalizer.

907: load equalizer receives the ARP reply message after the encapsulation, remove tunnel encapsulation, carry out address transition, the MAC Address of the IP fringe node n in the ARP reply message is converted to the MAC Address of IP fringe node group, then ARPreply message is given to subscriber equipment k;

908: subscriber equipment k receives ARP reply message, and the MAC Address that obtains the IPs correspondence is an IP fringe node group MAC Address.

909: identical with 509.

910: load equalizer is according to the user profile of the subscriber equipment of initiating the IPoE message, search the mapping table of subscriber equipment and IP fringe node, obtain corresponding IP fringe node n, change destination address then, alternatively, add the tunnel encapsulation of leading to IP fringe node n.

The conversion destination address specifically comprises: the MAC Address that the target MAC (Media Access Control) address of IPoE message is converted to IP fringe node n by IP fringe node group MAC Address or broadcast address, if the purpose IP address of IPoE message is IP fringe node group IP address or broadcast address, then also need the purpose IP address of IPoE message is converted to by IP fringe node group IP address transition or broadcast address the IP address of IP fringe node n.

911: load equalizer is transmitted to IP fringe node n with the IPoE message.

912: arrive IP fringe node n for the IPoE message of subscriber equipment k from network side, IP fringe node n sends the IPoE message to load equalizer, and purpose IP address is the IP address ip k of subscriber equipment k, and source MAC is the MAC Address MACn of IP fringe node.

913: load equalizer is looked into the address that mapping table obtains the IP fringe node group under the IP fringe node n according to purpose IP address, and carry out source address conversion, the source MAC of IPoE message is converted to the MAC Address of the IP fringe node group under the IP fringe node n by the MAC Address of IP fringe node n; If the source IP address of IPoE message is the IP address of IP fringe node, then load equalizer also will carry out source IP address conversion, is the IP address of the IP fringe node group under the IP fringe node n by the IP address transition of IP fringe node n with the source IP address of IPoE message.

914: load equalizer is transmitted to subscriber equipment k with the IPoE message.

The embodiment of the invention can comprise IP session repeating process shown in Figure 10; step 1001-1011 is an IP session repeating process; wherein; step 1001-1007 also can realize the IP session keepalive; receive the other side's ARP message at the appointed time each other when user and IP fringe node, illustrate that the IP session is normal.

1001-1006: identical with 901-906.

1007: load equalizer directly is transmitted to subscriber equipment k with ARP reply message.

1008: subscriber equipment k sends the IPoE message IPoE message of user side (promptly from) to load equalizer, and target MAC (Media Access Control) address is the MAC Address MACn of IP fringe node n.

1009: load equalizer is transmitted to IP fringe node n with the IPoE message.

The 1010:IP fringe node sends the IPoE message IPoE message of network side (promptly from) to load equalizer, and source MAC is the MAC Address MACn of IP fringe node.

1011: load equalizer is transmitted to subscriber equipment k with the IPoE message.

Need to prove that when the variation of IP fringe node, should be limited in same IP fringe node group inside, the user just can not perceive the variation of IP fringe node like this.And, when the user is moved to the 2nd IP fringe node by an IP fringe node, the 2nd IP fringe node or load equalizer should send gratuitous ARP message to the user, carry the IP address of IP fringe node group and the MAC Address of the 2nd IP fringe node, thereby make the user know that the corresponding MAC Address in IP address of IP fringe node group changes.

In the embodiment of the invention, load equalizer can be done address transition; Load equalizer can change the DHCP transfer of clean culture as broadcasting; Load equalizer can adopt the tunnel to link to each other with the IP fringe node, perhaps, load equalizer is done ARP proxy, these two kinds of methods can both make the aggregation node between load equalizer and the IP fringe node need not learn user's MAC Address, avoid the aggregation node autgmentability and the complexity issue that cause because of MAC Address quantity.

The embodiment of the invention can comprise that IP session shown in Figure 11 sets up process, and wherein, load equalizer is done address transition, and the address of the IP fringe node group under the IP fringe node does not need to know comprises:

1101-1102: identical with 301-302.

1103: load equalizer carries out the source address conversion, the source MAC of DHCP Discover message is transferred to the MAC Address of load equalizer by user's MAC address.

1104: load equalizer adds the tunnel encapsulation of leading to IP fringe node n according to the IP fringe node n that selects; Perhaps, load equalizer is done DHCP relay, is that destination address is the clean culture DHCP Discover message of the MAC Address of IP fringe node n with broadcasting DHCP Discover message conversion.

1105:IP fringe node n receives DHCP Discover message, if this DHCP Discover message has been added tunnel encapsulation, then removes tunnel encapsulation.

1106-1109: identical with 606-609.

1110: load equalizer is according to the user profile of the subscriber equipment of DHCP Offer message correspondence, the mapping table of searching subscriber equipment and IP fringe node obtains the MAC Address of subscriber equipment k, load equalizer carries out address transition, the target MAC (Media Access Control) address of DHCP Offer message is converted to the MAC Address of subscriber equipment k by the load equalizer MAC Address, transfer the source MAC of DHCP Offer message the MAC Address of IP fringe node group (or load equalizer) to by the MAC Address of IP fringe node n, the source IP address of DHCP Offer message is transferred to the IP address of IP fringe node group (or load equalizer) by IP fringe node n IP address.

Wherein, the user profile of the subscriber equipment of DHCP Offer message correspondence comprises: purpose IP address (being the IP address of subscriber equipment k) or other user profile (as circuit ID/ user vlan).

1111: load equalizer is done DHCP proxy, is the IP address of the IP fringe node group under the IP fringe node n with the IP address transition of the IP fringe node n in the DHCP Offer message, and DHCP Offer message is sent to the user.

1112: subscriber equipment k initiates broadcasting DHCP Request (address assignment request) message, and the source address of this message is user's MAC address MACk.

1113: according to the user profile of the subscriber equipment of initiating DHCP Request message, search subscriber equipment and obtain corresponding IP fringe node n, add the tunnel encapsulation of leading to IP fringe node n with the mapping table of IP fringe node; Perhaps, load equalizer is done DHCP relay, is that destination address is the clean culture DHCP Request message of the MAC Address of IP fringe node n with broadcasting DHCP Request message conversion.

1114:IP fringe node n receives DHCP Request message, if this message has been added tunnel encapsulation, then IP fringe node n removes tunnel encapsulation and obtains DHCP Request message.

1115-1118: identical with 615-618.

1119: according to the user profile of the subscriber equipment of DHCP Ack message correspondence, search user and the mapping table of IP fringe node and obtain the MAC Address of corresponding subscriber equipment k, load equalizer carries out address transition, the MAC Address that the target MAC (Media Access Control) address of DHCP Ack message is transferred to subscriber equipment k by the load equalizer MAC Address, transfer the source MAC of DHCP Ack message the MAC Address of IP fringe node group (or load equalizer) to by the MAC Address of IP fringe node n, the source IP address of DHCP Ack message is transferred to the IP address of IP fringe node group (or load equalizer) by IP fringe node n IP address.

The user profile of the subscriber equipment of DHCP Ack message correspondence comprises: purpose IP address (being the IP address of subscriber equipment k) or other user profile (as circuit ID/ user vlan).

1120, load equalizer is done DHCP proxy, and the IP address with the IP fringe node group under the IP fringe node n is revised as in the IP address of the IP fringe node n in the DHCP Ack message sends to subscriber equipment k with DHCP Ack message.

The embodiment of the invention can comprise that IP session shown in Figure 12 sets up process, and wherein, load equalizer is done address transition, and the address of the IP fringe node group under the IP fringe node need be known comprises:

1201-1205: identical with 1101-1105.

1206:IP fringe node n sends to aaa server with subscriber's line ID entrained in the DHCP Discover message by aaa protocol message and carries out authentification of user.

Wherein, aaa protocol message can be radius (radius) protocol message.

1207: after authentification of user passed through, IP fringe node n was relayed to Dynamic Host Configuration Protocol server with DHCP Discover message.

The 1208:DHCP server is replied DHCP Offer (the address assignment service is confirmed) message to IP fringe node n, and it is subscriber equipment k IP address allocated (being made as IPk) that this message is carried Dynamic Host Configuration Protocol server.

1209:IP fringe node n is the IP address that DHCP Offer message is added the affiliated IP fringe node group of IP fringe node n, and IP fringe node n sends to load equalizer with DHCP Offer message.

1210: identical with 1110.

1211: load equalizer sends to the user with DHCP Offer message.

1212-1216: identical with 1112-1116.

1217:IP fringe node n is the IP address that DHCP Ack message is added the affiliated IP fringe node group of IP fringe node n, and IP fringe node n sends to load equalizer with DHCP Ack message.

1218-1219: identical with 1118-1119.

1220: load equalizer sends to subscriber equipment k with DHCP Ack message.

The embodiment of the invention can comprise IP session keepalive process shown in Figure 13, comprising:

1301: when carrying out the IP session keepalive between subscriber equipment k and the IP fringe node group, subscriber equipment k initiates BFD message, and purpose IP address is the IP address of IP fringe node group, and target MAC (Media Access Control) address is the MAC Address of IP fringe node group.

1302: load equalizer is according to the user profile of the subscriber equipment of initiating BFD message, search the user and obtain corresponding IP fringe node n with the mapping table of IP fringe node, the destination address of BFD message is converted to the IP address of IP fringe node n, the target MAC (Media Access Control) address of BFD message is converted to the MAC Address of IP fringe node n by IP fringe node group MAC Address; The MAC Address that the source MAC of BFD message is transferred to load equalizer by user's MAC address MACk; Alternatively, add the tunnel encapsulation of leading to IP fringe node n.

The user profile of initiating the subscriber equipment of BFD message comprises: the source address of subscriber equipment (being user's MAC address MACk or IP address IPk) or other user profile (as subscriber's line ID/ user vlan).

1303:IP fringe node n receives BFD message; If tunnel encapsulation is arranged, then remove tunnel encapsulation.

1304:IP fringe node n initiates BFD message, and source address is the IP address of IP fringe node n, and destination address is the IP address ip k of subscriber equipment k; Alternatively, add the tunnel encapsulation of leading to load equalizer.

1305: if tunnel encapsulation is arranged, then load equalizer is removed tunnel encapsulation; Load equalizer carries out the source address conversion, is the IP address of the IP fringe node group under the IP fringe node n with the source address of BFD message by the IP address transition of IP fringe node n, the source MAC of BFD message is transferred to the MAC Address of IP fringe node group by the MAC Address of IP fringe node n;

Purpose IP address (being the IP address of subscriber equipment k) or other user profile (as user vlan) according to BFD message, search user and the mapping table of IP fringe node and obtain the MAC Address of corresponding subscriber equipment k, load equalizer carries out address transition, the target MAC (Media Access Control) address of BFD message is transferred to the MAC Address of subscriber equipment k by the load equalizer MAC Address.

1306: load equalizer is given subscriber equipment k with the BFD forwards.

The embodiment of the invention can comprise IP session repeating process shown in Figure 14, comprising:

1401: when subscriber equipment k will be the IP fringe node group communication of IPs with the IP address, subscriber equipment k initiated ARPrequest (request) message, the MAC Address of request IPs correspondence.

1402: load equalizer is done ARP proxy, with the MAC Address of IP fringe node group MAC Address as the IPs correspondence, replys ARP reply message.

1403: when the IP fringe node will be the subscriber equipment k of IPk when communicating by letter with the IP address, the IP fringe node is initiated ARPrequest (request) message, asks the MAC Address of IPk correspondence.

1404: load equalizer is done ARP proxy, with the MAC Address of the load equalizer MAC Address as the IPk correspondence, replys ARP reply message.

1405: subscriber equipment k initiates the message to IPoE, and purpose IP address is IPs or broadcast address, and target MAC (Media Access Control) address is IP fringe node group MAC Address or broadcast address.

1406: load equalizer is according to the user profile of the subscriber equipment of IPoE message correspondence, search the user and obtain corresponding IP fringe node n, the target MAC (Media Access Control) address of IPoE message is converted to the MAC Address of IP fringe node n by IP fringe node group MAC Address or broadcast address with the mapping table of IP fringe node; The MAC Address that the source MAC of IPoE message is transferred to load equalizer by user's MAC address MACk.

The user profile of the subscriber equipment of IPoE message correspondence comprises: the source address of IPoE message (being user's MAC address MACk or IP address IPk) or other user profile (as circuit ID/ user vlan).

1407: load equalizer sends the IPoE message to IP fringe node n.

1408: arrive IP fringe node n for the IPoE message of subscriber equipment k from network side, IP fringe node n sends the IPoE message to load equalizer, purpose IP address is the IP address ip k of subscriber equipment k, source MAC is an IP fringe node MAC Address, and target MAC (Media Access Control) address is the load equalizer MAC Address.

1409: load equalizer carries out source address conversion, with the source MAC of IPoE message by IP fringe node n MAC Address transfer to IP fringe node group MAC Address;

User profile according to the subscriber equipment of IPoE message correspondence, search the mapping table of user and IP fringe node, obtain the MAC Address of corresponding subscriber equipment k, load equalizer carries out address transition, the target MAC (Media Access Control) address of IPoE message is transferred to the MAC Address of subscriber equipment k by the load equalizer MAC Address.

The user profile of the subscriber equipment of IPoE message correspondence comprises: the purpose IP address of IPoE message (being the IP address of subscriber equipment k) or other user profile (as user vlan).

1410: load equalizer is transmitted to subscriber equipment k with the IPoE message.

The embodiment of the invention can comprise IP session repeating process shown in Figure 15, comprising:

1501-1505: identical with 1401-1405.

1506: load equalizer is searched the user and is obtained corresponding IP fringe node n with the mapping table of IP fringe node according to the user profile of the subscriber equipment of initiating the IPoE message; The MAC Address that the source MAC of IPoE message is transferred to load equalizer by user's MAC address MACk; Add the tunnel encapsulation of leading to IP fringe node n.

The user profile of initiating the subscriber equipment of IPoE message comprises: the source address of IPoE message (being user's MAC address MACk or IP address IPk) or other user profile (as circuit ID/ user vlan).

1507: load equalizer is transmitted to IP fringe node n with the IPoE message.

1508: arrive IP fringe node n for the IPoE message of subscriber equipment k from network side, IP fringe node n sends to the IPoE message of load equalizer, purpose IP address is the IP address ip k of subscriber equipment k, source MAC is an IP fringe node group MAC Address, and target MAC (Media Access Control) address is the load equalizer MAC Address.

1509: load equalizer is according to the user profile of the subscriber equipment of IPoE message correspondence, search user and the mapping table of IP fringe node and obtain the MAC Address of corresponding subscriber equipment k, load equalizer carries out address transition, the target MAC (Media Access Control) address of IPoE message is transferred to the MAC Address of subscriber equipment k by the load equalizer MAC Address.

1510: load equalizer is transmitted to subscriber equipment k with the IPoE message.

In the embodiment of the invention, the IP fringe node can be the Business Processing gateway, is example with BSG (or being called Service BNG), and load equalizer is finished authentification of user and IP address assignment as router (be BNG, or be called Network BNG); The IP fringe node is done Business Processing; Load equalizer adopts the tunnel to link to each other with the IP fringe node, because load equalizer is as router, user's MAC address can be isolated, the network aware on the load equalizer is avoided the autgmentability and the complexity issue that cause because of MAC Address quantity less than user's MAC address.

The embodiment of the invention can comprise that IP session shown in Figure 16 sets up process, comprising:

1601: load equalizer can also be found the IP address of the BSG group that BSGn is affiliated by the IP address of routing protocol message discovery BSGn.

1602: subscriber equipment k initiates broadcasting DHCP Discover (address assignment discovery) message, starts the IP address assignment flow process.

1603: after load equalizer listens to broadcasting DHCP Discover message, and carry out authentification of user between the aaa server, load equalizer obtains user's configuration (profile), and user's configuration comprises the user or from the pairing physics BSG of user's stream address.

1604: load equalizer sends to Dynamic Host Configuration Protocol server by physics BSG with DHCP Discover message.

The 1605:DHCP server sends to load equalizer with DHCP Offer message, and carrying Dynamic Host Configuration Protocol server is subscriber equipment k IP address allocated IPk.

1606: load equalizer sends to subscriber equipment k with DHCP Offer message.

1607: subscriber equipment k initiates broadcasting DHCP Request message.

1608: load equalizer listens to broadcasting DHCP Request message, sends DHCP Request message to Dynamic Host Configuration Protocol server.

The 1609:DHCP server sends DHCP Ack message to load equalizer, and the band Dynamic Host Configuration Protocol server is subscriber equipment k IP address allocated IPk.

1610: load equalizer is according to the load balancing situation of each BSG in the BSG group, from BSG group, select a BSG (for example BSGn) as this user of service or from the BSG of user's stream, obtain IP address and MAC Address and the network side physical port of this BSG, set up the mapping table of user and physics BSG, IP address is determined yet in the mapping table shown in the table 1 at this moment.

Wherein, mapping table can be the ACL (Access Control List, access control table) of router.

1611: load equalizer is DHCP and is intercepted, obtain distributing to the IP address of subscriber equipment k according to the DHCP Ack message that listens to, to add in the user profile of subscriber equipment in the mapping table for the IP address of user equipment allocation, user device IP address is IPk in the mapping table shown in the table 1 at this moment.

1612: load equalizer sends the main frame route of IPk to the BSGn that selects by routing protocol message, BSGn sends the main frame route of IPk to other router by routing protocol message, down direction is that the message of IPk must be handled through BSGn to destination address like this, thereby realizes the drainage of down direction.

1613: load equalizer is to be given to the user during DHCP Ack message is added behind the IP address of load equalizer.

The embodiment of the invention can comprise IP session repeating process shown in Figure 17, comprising:

1701: when subscriber equipment k will be the BSG group communication of IPs with the IP address, subscriber equipment k initiated the IP message, and purpose IP address is IPs, and source address is IPk.

1702: load equalizer is according to the user profile of the subscriber equipment of initiating the IP message, and the mapping table of searching subscriber equipment and IP fringe node obtains corresponding physical BSGn; Add the tunnel encapsulation of leading to physics BSGn.

The user profile of initiating the subscriber equipment of IP message comprises: the source address of IP message (being user's MAC address MACk or IP address IPk) or other user profile (as circuit ID/ user vlan).

1703: load equalizer is forwarded to physics BSGn with the IP message.

1704: from the IP message of network side to subscriber equipment k, by the drainage of step 1612, arrive physics BSGn, physics BSG transmits the IP message and gives load equalizer, and destination address is the IP address ip k of subscriber equipment k.

1705: load equalizer is transmitted the IP message and is given subscriber equipment k.

Present embodiment can reach following effect by such scheme:

One, provide service by IP fringe node group for users of specific area, and loading condition according to IP fringe node group, adjust the IP fringe node of forming IP fringe node group, thereby it is variable making the bandwidth of IP fringe node group, can improve the bandwidth of IP fringe node group when serving peak value like this by the quantity that increases the IP fringe node, need not improve the bandwidth of single IP fringe node, reduced requirement to IP fringe node bandwidth, period outside the service peak value can reduce the bandwidth of IP fringe node group by the quantity that reduces the IP fringe node, the IP fringe node that reduces can be used to other IP fringe node group services, has improved the utilance of IP fringe node.

Two; when communicating by IP fringe node group; for example; the address of carrying IP fringe node group in the dhcp message that load equalizer in the process returns to subscriber equipment is set up in the IP session; IP session keepalive process is carried out keep-alive by the IP address of IP fringe node group; IP session forwarding process is carried out two layers of forwarding by the MAC Address of IP fringe node group; therefore; subscriber equipment can only perceive the address of IP fringe node group; can shield the address of IP fringe node to the user; when because disaster tolerance; green energy conservation; or load balancing is when causing the IP fringe node to change; as long as the address of IP fringe node group is constant, the user just can not perceive the change of IP fringe node.

Three,, avoid each communication all to reselect suitable IP fringe node, thereby reduced the complexity of load equalizer by setting up mapping table.

Four, E-Packet by the tunnel encapsulation technology, the aggregation node between load equalizer and the IP fringe node need not be learnt user's MAC Address, has reduced the complexity of aggregation node.

Referring to Figure 18, the embodiment of the invention provides a kind of load equalizer on the other hand, comprising:

Receiver 1801 is used to receive the message from subscriber equipment;

Select module 1802, be used for from selecting an IP fringe node for the Internet protocol IP fringe node group of this subscriber equipment affiliated area service, wherein, the quantity of the IP fringe node in this IP fringe node group is dynamically to adjust according to the loading condition of this IP fringe node group, and the bandwidth that this adjustment can make this IP fringe node group provide satisfies the bandwidth demand of this subscriber equipment affiliated area;

Transmitter 1803 is used for this message is transmitted to the IP fringe node of this selection.

This load equalizer can also comprise:

Adjusting module is used for adjusting the quantity of the IP fringe node of IP fringe node group.Concrete adjustment can comprise: be load set one upper limit threshold of this IP fringe node group and a lower limit threshold value in advance, if the load of IP fringe node group is more than or equal to this upper limit threshold, then increase the quantity of IP fringe node in this IP fringe node group, if the load of IP fringe node group, then reduces the quantity of IP fringe node in this IP fringe node group less than this lower threshold.

This load equalizer can also comprise:

Determination module, be used for before selection module 1802 is selected an IP fringe node from the Internet protocol IP fringe node group of serving for this subscriber equipment affiliated area, be defined as the IP fringe node group of this subscriber equipment affiliated area service, this IP fringe node group that is defined as this subscriber equipment affiliated area service comprises:

The user profile of this subscriber equipment that carries according to this message is determined this subscriber equipment affiliated area, according to this subscriber equipment affiliated area, and the zone that sends of the Network Management Equipment that receives and be the related information of the IP fringe node group of this regional service, be defined as the IP fringe node group of this subscriber equipment affiliated area service;

Perhaps,

Judge whether the destination address that this message carries is the address information of IP fringe node group, if the IP fringe node group of the address information correspondence of this IP fringe node group that this message is carried is as the IP fringe node group for this subscriber equipment affiliated area service.

Select module 1802, specifically be used for loading condition, from this IP fringe node group, select the IP fringe node according to each IP fringe node of this IP fringe node group.

This load equalizer also comprises:

Set up and forwarding module, be used in this selection module 1802 after selecting an IP fringe node, setting up the mapping table of the IP fringe node of this subscriber equipment and this selection for the Internet protocol IP fringe node group of this subscriber equipment affiliated area service; Reception is from the subsequent packet of this subscriber equipment, and the user profile of this subscriber equipment that carries according to this subsequent packet finds the IP fringe node of this selection from this mapping table, this subsequent packet is transmitted to the IP fringe node of this selection.

In the dynamic host configuration protocol DHCP process, this message is that address assignment is found message or address assignment request message, when this foundation and forwarding module were used to set up the mapping table of IP fringe node of this subscriber equipment and this selection, this foundation and forwarding module specifically were used for

Set up the mapping table of nodal information of the IP fringe node of the user profile of this subscriber equipment and this selection, this nodal information comprises the address of IP fringe node group under the IP fringe node of the address of IP fringe node of this selection and this selection;

Receive the address assignment acknowledge message that this IP fringe node of stating selection returns, this address assignment acknowledge message is carried the IP address of server for this user equipment allocation, will add in the user profile of this subscriber equipment in this mapping table for the IP address of this user equipment allocation.

Transmitter 1803 specifically is used for

Tunnel encapsulation for this message adds the IP fringe node that leads to this selection is transmitted to this IP fringe node with this message after the encapsulation; Perhaps,

The target MAC (Media Access Control) address of this message is the MAC Address of this IP fringe node group, and the target MAC (Media Access Control) address of this message is converted to the MAC Address of the IP fringe node of this selection, this message after the conversion is transmitted to the IP fringe node of this selection; Perhaps,

The purpose IP address of this message is the IP address of this IP fringe node group, is the IP address of the IP fringe node of this selection with the purpose IP address transition of this message, this message after the conversion is transmitted to the IP fringe node of this selection.

Transmitter 1803 also was used for before the message of receiver reception from subscriber equipment,

Be provided as the MAC Address of the IP fringe node group of its affiliated area service to this subscriber equipment as ARP proxy;

Perhaps,

In the dynamic host configuration protocol DHCP process, when this message is address assignment discovery message, this receiver 1801 also is used at this transmitter 1803 after this message is transmitted to the IP fringe node of this selection, receive the address assignment service acknowledgement message that the IP fringe node of this selection returns, this address assignment service acknowledgement message is carried the IP fringe node of this selection or the IP address of IP fringe node group under it;

This transmitter 1803 also be used for when this address assignment service acknowledgement message carry be the IP address of IP fringe node group under the IP fringe node of this selection the time, this address assignment service acknowledgement message is transmitted to this subscriber equipment; When this address assignment service acknowledgement message carry be the IP address of IP fringe node of this selection the time, be the IP address of IP fringe node group under the IP fringe node of this selection with the IP address transition of the IP fringe node of this selection, the address assignment service acknowledgement message after the conversion is transmitted to this subscriber equipment.

In the dynamic host configuration protocol DHCP process, when this message is address assignment request message, this receiver 1801 also is used at this transmitter 1803 after this message is transmitted to the IP fringe node of this selection, receive the address assignment acknowledge message that the IP fringe node of this selection returns, this address assignment acknowledge message is carried is the IP fringe node of this selection or the IP address of IP fringe node group under it;

This transmitter 1803 also be used for when this address assignment acknowledge message carry be the IP address of IP fringe node group under the IP fringe node of this selection the time, this address assignment acknowledge message is transmitted to this subscriber equipment; When this address assignment acknowledge message is carried when being the IP address of IP fringe node of this selection, be the IP address of IP fringe node group under the IP fringe node of this selection with the IP address transition of the IP fringe node of this selection, the address assignment acknowledge message after the conversion is transmitted to this subscriber equipment.

Further, this transmitter 1803 also is used in this selection module 1802 after selecting an IP fringe node for the Internet protocol IP fringe node group of this subscriber equipment affiliated area service, send the IP fringe node of the main frame route of this user device IP address by routing protocol message to this selection, the main frame route that the IP fringe node of this selection sends this user device IP address by routing protocol message is to other routers, so that destination address is that the message of this user device IP address is through this physical IP fringe node.

Load equalizer among load equalizer in the present embodiment and the method embodiment belongs to same design, and its specific implementation process sees method embodiment for details.

Present embodiment can reach following effect by such scheme:

The all or part of step that one of ordinary skill in the art will appreciate that realization the foregoing description can be finished by hardware, also can instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a communication means is characterized in that, comprising:

Reception is from the message of subscriber equipment;

From being to select an IP fringe node the Internet protocol IP fringe node group of described subscriber equipment affiliated area service, wherein, IP fringe node quantity in the described IP fringe node group is dynamically to adjust according to the loading condition of described IP fringe node group, and the bandwidth that described adjustment can make described IP fringe node group provide satisfies the bandwidth demand of described subscriber equipment affiliated area;

Described message is transmitted to the IP fringe node of described selection.

2. method according to claim 1, it is characterized in that, described from being to select the Internet protocol IP fringe node group of described subscriber equipment affiliated area service before the IP fringe node, described method also comprises the step of the IP fringe node group that is defined as described subscriber equipment affiliated area service, and described step comprises:

The user profile of the described subscriber equipment that carries according to described message is determined described subscriber equipment affiliated area, according to described subscriber equipment affiliated area, and the zone that sends of the Network Management Equipment that receives and be the related information of the IP fringe node group of described regional service, be defined as the IP fringe node group of described subscriber equipment affiliated area service;

Perhaps,

Judge whether the destination address that described message carries is the address information of IP fringe node group, if the IP fringe node group of the address information correspondence of the described IP fringe node group that described message is carried is as the IP fringe node group for described subscriber equipment affiliated area service.

3. method according to claim 1 is characterized in that, described method also comprises the step of adjusting the quantity of the IP fringe node in the described IP fringe node group according to the loading condition of described IP fringe node group:

Be load set one upper limit threshold and a lower limit threshold value of described IP fringe node group in advance, if the load of described IP fringe node group is more than or equal to described upper limit threshold, increase the quantity of IP fringe node in the described IP fringe node group, if the load of described IP fringe node group, reduces the quantity of IP fringe node in the described IP fringe node group less than described lower threshold.

4. according to claim 1 or 2 or 3 described methods, it is characterized in that, from comprising for IP fringe node of selection the Internet protocol IP fringe node group of described subscriber equipment affiliated area service:

According to the loading condition of each the IP fringe node in the described IP fringe node group, from described IP fringe node group, select the IP fringe node.

5. according to claim 1 or 2 or 3 described methods, it is characterized in that described from being to select the Internet protocol IP fringe node group of described subscriber equipment affiliated area service after the IP fringe node, described method also comprises:

Set up the mapping table of the IP fringe node of described subscriber equipment and described selection;

Reception is from the subsequent packet of described subscriber equipment, and the user profile of the described subscriber equipment that carries according to described subsequent packet finds the IP fringe node of described selection from described mapping table, described subsequent packet is transmitted to the IP fringe node of described selection.

6. according to claim 1 or 2 or 3 described methods, it is characterized in that, described described message be transmitted to the IP fringe node of described selection, comprising:

Tunnel encapsulation for described message adds the IP fringe node that leads to described selection is transmitted to described IP fringe node with the described message after the encapsulation; Perhaps,

The target MAC (Media Access Control) address of described message is the MAC Address of described IP fringe node group, and the target MAC (Media Access Control) address of described message is converted to the MAC Address of the IP fringe node of described selection, the described message after the conversion is transmitted to the IP fringe node of described selection; Perhaps,

The purpose IP address of described message is the IP address of described IP fringe node group, is the IP address of the IP fringe node of described selection with the purpose IP address transition of described message, the described message after the conversion is transmitted to the IP fringe node of described selection.

7. according to claim 1 or 2 or 3 described methods, it is characterized in that before the message of described reception from subscriber equipment, described method also comprises:

Be provided as the MAC Address of the IP fringe node group of its affiliated area service to described subscriber equipment as ARP proxy;

Perhaps,

To send to described subscriber equipment for the IP address of the IP fringe node group of described subscriber equipment affiliated area service.

8. method according to claim 5 is characterized in that, in the dynamic host configuration protocol DHCP process, described message is that address assignment is found message or address assignment request message,

The described mapping table of setting up the IP fringe node of described subscriber equipment and described selection comprises:

Set up the mapping table of nodal information of the IP fringe node of the user profile of described subscriber equipment and described selection, described nodal information comprises the address of IP fringe node group under the IP fringe node of the address of IP fringe node of described selection and described selection;

Receive the address assignment acknowledge message that the described IP fringe node of stating selection returns, described address assignment acknowledge message is carried the IP address that server is described user equipment allocation, will add in the user profile of subscriber equipment described in the described mapping table for the IP address of described user equipment allocation.

9. according to claim 1 or 2 or 3 described methods, it is characterized in that, in the dynamic host configuration protocol DHCP process, when described message is address assignment discovery message, after the described IP fringe node that described message is transmitted to described selection, described method also comprises:

Receive the address assignment service acknowledgement message that the IP fringe node of described selection returns, described address assignment service acknowledgement message is carried the IP fringe node of described selection or the IP address of IP fringe node group under it;

When described address assignment service acknowledgement message carry be the IP address of IP fringe node group under the IP fringe node of described selection the time, described address assignment service acknowledgement message is transmitted to described subscriber equipment; When described address assignment service acknowledgement message carry be the IP address of IP fringe node of described selection the time, be the IP address of IP fringe node group under the IP fringe node of described selection with the IP address transition of the IP fringe node of described selection, the address assignment service acknowledgement message after the conversion is transmitted to described subscriber equipment.

10. according to claim 1 or 2 or 3 described methods, it is characterized in that, in the dynamic host configuration protocol DHCP process, when described message is address assignment request message, after the described IP fringe node that described message is transmitted to described selection, described method also comprises:

Receive the address assignment acknowledge message that the IP fringe node of described selection returns, described address assignment acknowledge message is carried is the IP fringe node of described selection or the IP address of IP fringe node group under it;

When described address assignment acknowledge message carry be the IP address of IP fringe node group under the IP fringe node of described selection the time, described address assignment acknowledge message is transmitted to described subscriber equipment; When described address assignment acknowledge message is carried when being the IP address of IP fringe node of described selection, be the IP address of IP fringe node group under the IP fringe node of described selection with the IP address transition of the IP fringe node of described selection, the address assignment acknowledge message after the conversion is transmitted to described subscriber equipment.

11. according to claim 1 or 2 or 3 described methods, it is characterized in that, described from being to select the Internet protocol IP fringe node group of described subscriber equipment affiliated area service to comprise after the IP fringe node:

Send the IP fringe node of the main frame route of described user device IP address by routing protocol message to described selection, the main frame route that the IP fringe node of described selection sends described user device IP address by routing protocol message is to other routers, so that destination address is that the message of described user device IP address is through described physical IP fringe node.

12. a load equalizer is characterized in that, comprising:

Receiver is used to receive the message from subscriber equipment;

Select module, be used for from selecting an IP fringe node for the Internet protocol IP fringe node group of described subscriber equipment affiliated area service, wherein, the quantity of the IP fringe node in the described IP fringe node group is that Network Management Equipment is dynamically adjusted according to the loading condition of described IP fringe node group, and the bandwidth that described adjustment can make described IP fringe node group provide satisfies the bandwidth demand of described subscriber equipment affiliated area;

13. load equalizer according to claim 12 is characterized in that, described load equalizer also comprises:

Determination module, be used for before described selection module is selected an IP fringe node from the Internet protocol IP fringe node group of serving for described subscriber equipment affiliated area, be defined as the IP fringe node group of described subscriber equipment affiliated area service, the described IP fringe node group that is defined as the service of described subscriber equipment affiliated area comprises:

Perhaps,

14. method according to claim 12 is characterized in that, described load equalizer also comprises:

Adjusting module is used for adjusting the quantity of the IP fringe node of IP fringe node group, and described adjustment specifically comprises:

15., it is characterized in that described selection module specifically is used for according to claim 12 or 13 or 14 described load equalizers

16., it is characterized in that described load equalizer also comprises according to claim 12 or 13 or 14 described load equalizers:

Set up and forwarding module, be used in described selection module after selecting an IP fringe node, setting up the mapping table of the IP fringe node of described subscriber equipment and described selection for the Internet protocol IP fringe node group of described subscriber equipment affiliated area service; Reception is from the subsequent packet of described subscriber equipment, and the user profile of the described subscriber equipment that carries according to described subsequent packet finds the IP fringe node of described selection from described mapping table, described subsequent packet is transmitted to the IP fringe node of described selection.

17., it is characterized in that described transmitter specifically is used for according to claim 12 or 13 or 14 described load equalizers

18., it is characterized in that described transmitter also was used for before the message of receiver reception from subscriber equipment according to claim 12 or 13 or 14 described load equalizers,

Perhaps,

19. load equalizer according to claim 16 is characterized in that,

In the dynamic host configuration protocol DHCP process, described message is that address assignment is found message or address assignment request message, when described foundation and forwarding module were used to set up the mapping table of IP fringe node of described subscriber equipment and described selection, described foundation and forwarding module specifically were used for

20. according to claim 12 or 13 or 14 described load equalizers, it is characterized in that, in the dynamic host configuration protocol DHCP process, when described message is address assignment discovery message,

Described receiver also is used at described transmitter after described message is transmitted to the IP fringe node of described selection,

Described transmitter also is used for

21. according to claim 12 or 13 or 14 described load equalizers, it is characterized in that, in the dynamic host configuration protocol DHCP process, when described message is address assignment request message,

Described transmitter also is used for

22., it is characterized in that described transmitter also is used for according to claim 12 or 13 or 14 described load equalizers

Described selection module from be select an IP fringe node the Internet protocol IP fringe node group of described subscriber equipment affiliated area service after,