CN101754278A - Method, system and device for load balancing - Google Patents
Method, system and device for load balancing Download PDFInfo
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- CN101754278A CN101754278A CN200810240012A CN200810240012A CN101754278A CN 101754278 A CN101754278 A CN 101754278A CN 200810240012 A CN200810240012 A CN 200810240012A CN 200810240012 A CN200810240012 A CN 200810240012A CN 101754278 A CN101754278 A CN 101754278A
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Abstract
The invention discloses a method, a system and a device for load balancing, which are applied to a proxy mobile IPv6 network. The method comprises the following steps that: a routing management entity periodically reports load information according to each local mobile anchor point (LMA) and determines an overload LMA and a light load LMA; and the routing management entity notifies a mobile access gateway (MAG) which forwards data through the overload LMA to adjust data forwarding routing to ensure that the MAG changes the data required to be forwarded by the overload LMA into the data forwarded by the light load LMA. The method, the system and the device improve the architecture of the existing proxy mobile IPv6 network, and perform the balancing of data forwarding amount between the overload LMA and the light weight LMA by adopting a plurality of the LMA and a newly-added network entity namely the routing management entity and adjusting the data forwarding path of the MAG, so the load balancing of the LMA can be realized dynamically in real time.
Description
Technical field
The present invention relates to proxy mobile IPv 6 (Internet Protocol Version 6) network, relate in particular to a kind of load-balancing method, Apparatus and system.
Background technology
In next generation mobile Internet, because the overall situation moves the various drawbacks of bringing, for example signaling consumption is big, need to revise main frame etc., the internet engineering task group IETF of International Standards Organization has proposed based on network regional mobility management protocol draft at present: and proxy mobile IPv 6 (Proxy Mobile IPv6, PMIPv6).
In the PMIPv6 definition, use the network area of a mobile node mobile management of PMIPv6 protocol processes behavior to be called Proxy Mobile IPv6 Domain (hereinafter to be referred as the PMIPv6 territory).Fig. 1 is the topology example in existing P MIPv6 territory, in this territory, the functional entity of core comprise a local mobile anchor (Local Mobility Anchor, LMA) and a plurality of Mobile Access Gateways (Mobile Access Gateway, MAG).LMA is responsible for keeping mobile node addressable, is the supplier of moving nodes local network prefix simultaneously.On behalf of mobile node, MAG carry out mobile management, is positioned at the position that mobile node inserts, be responsible for detection node move and and LMA between Signalling exchanges such as binding registration.Wherein MN is mobile node (Mobile Node) among Fig. 1; (Mobile Node ' s Home Address MN-HoA) is the home address of MN in a PMIPv6 territory, and when MN was mobile in a PMIPv6 territory, MN used this address always in the moving nodes local address; (Proxy Care-of Address by the MAG configuration, is the end points in tunnel between LMA and the MAG Proxy-CoA), and LMA is considered as the Care-of Address of MN with this address and registers on LMA to act on behalf of Care-of Address.
In case mobile node is connected into the PMIPv6 territory by certain bar access link, the MAG on this link determines after identifying MN whether this MN is authorized to use the PMIPv6 service.If confirm that MN is authorized to, then network will guarantee the address configuration mechanism address acquisition that the interface equipment of MN access network uses any this network to allow, and MN can be moved arbitrarily in this PMIPv6 territory.The address configuration information that MN obtained comprises default router address and other the relevant configuration informations on home network prefix, this link.From the angle of MN, whole PMIPv6 territory can be considered an independent link, even if after MN changes the link that inserts this PMIPv6, still can keep its initial address configuration.
When MN enters the PMIPv6 territory, MAG perceives the access of MN, MAG sends agent binding update messages (Proxy Binding Update to LMA, PBU), LMA returns proxy binding acknowledgment messages (Proxy Binding Acknowledgement to MAG after receiving PBU, PBA), in PBA, carry home network prefix, simultaneously LMA will set up banding cache (Binding Cache entry, BCE) and and MAG between a bidirectional tunnel.After MAG receives PBA, the bidirectional tunnel between foundation and LMA, by this, MAG has all required information of home link of simulating MN.MAG sends the home network prefix of advertising of route (RA) with declaration MN on the link that MN inserts afterwards.MN can carry out address configuration after receiving RA.So far, MN finishes the process that inserts the PMIPv6 territory, and MAG is the default router on the MN access link, and LMA is the anchor point that MN inserts home network in the network topology, and the data traffic of MN and Correspondent Node is transmitted by the bidirectional tunnel between LMA and the MAG.
When MN from previous MAG (post MAG, p-MAG) switch to new MAG (new MAG, in the time of n-MAG), p-MAG perceives MN and leaves its access link, sends the agent binding update messages (PBU) of cancellation binding to LMA, LMA receives this PBU and returns PBA.After n-MAG finds that MN inserts, will insert the flow process in PMIPv6 territory by binding and routing iinformation on the PBU signaling update LMA according to MN.MN will receive on the new link with before identical RA, thereby believe that it still is in identical link and uses identical address configuration.
As seen, the PMIPv6 technology can not participate in realizing under the prerequisite of mobile signaling protocol the mobile switching of MN at MN, all need to carry out tunnel processing and route through single LMA but the potential problems of PMIPv6 are all data in the PMIPv6 territory, this must cause LMA pressure excessive.And along with the high speed development of Internet, the mass data message that brings as video traffic of high definition etc. has formed great challenge to the disposal ability of LMA.
Summary of the invention
The embodiment of the invention provides a kind of load-balancing method, Apparatus and system, in order to solve the bigger problem of LMA load pressure that existing proxy mobile IPv 6 network exists.
The load-balancing method that the embodiment of the invention provides is applied to the proxy mobile IPv 6 network, comprising:
The load information that routing management entity periodically reports according to each local mobile anchor LMA is determined overload LMA and underloading LMA;
Described routing management entity notice is adjusted the data forwarding route via the Mobile Access Gateway MAG that described overload LMA transmits data, and the data that make described MAG will need described overload LMA to transmit are changed into via described underloading LMA and transmitted.
The load-balancing method that the embodiment of the invention provides also comprises: each MAG sets up corresponding tunnel respectively with between each LMA in advance;
The data that described MAG will need described overload LMA to transmit are transmitted via described underloading LMA, comprising: described MAG will need the data of described overload LMA forwarding, by and described underloading LMA between the tunnel be sent to described underloading LMA;
Described underloading LMA transmits the described data that receive through the tunnel.
Described each MAG sets up corresponding tunnel respectively with between each LMA, comprising:
When each MAG starts,, initiate to set up tunneled requests to each LMA respectively according to the information of each pre-configured LMA;
Described each LMA is established to the tunnel of described MAG according to the address information of the MAG that carries in the described request that receives; And return to described MAG and to set up response message;
Described MAG is established to the tunnel of described each LMA according to the address information of the LMA that carries in the described message that receives.
Each LMA comprises to described routing management entity load information reporting periodically:
Each LMA periodically adds up total quantity and self cpu busy percentage for the upstream data bag of transmitting in the quantity of the upstream data bag of each MAG forwarding, the current period, and reports to described routing management entity;
Described routing management entity is determined overload LMA and underloading LMA, comprising:
The total quantity of the upstream data bag of transmitting in the described LMA current period that described routing management entity reports each LMA and the maximum threshold of setting and minimum threshold are relatively, or the cpu busy percentage that each LMA reports compared with the maximum threshold and the minimum threshold of setting, when both are arbitrary when exceeding maximum threshold, determine described LMA overload; When both are arbitrary when being lower than minimum threshold, determine described LMA underloading.
Described routing management entity notifies described MAG to adjust the data forwarding route, comprising:
Described routing management entity is according to the described overload LMA that determines, and the quantity of the upstream data bag of transmitting for each MAG that reports of described overload LMA, determines the MAG that needs adjustment, and notifies its adjustment data forwarding route.
Described routing management entity is notified described MAG by following manner:
Described routing management entity is adjusted signaling by sending load to the described MAG that determines, and notifies described MAG to revise its data forwarding route, carries the address information of overload LMA and the address information of adjusted underloading LMA in the described signaling.
The load-balancing method that the embodiment of the invention provides also comprises: when mobile node MN switched, the MAG after described MN switches sent the routing update signaling to described routing management entity; Described signaling carries the address prefix of described MN, and described MN switches the address information of preceding MAG and switching back MAG;
Described routing management entity is forwarded to each LMA with described routing update signaling;
Described each LMA adjusts route according to described routing update signaling, the feasible data that are sent to described MN, and back MAG transmits by described switching.
The embodiment of the invention also provides a kind of network system, comprising:
A plurality of local mobile anchor LMA are used for periodically reporting self load information to routing management entity respectively;
Routing management entity is used for the load information that periodically reports according to each LMA, determines overload LMA and underloading LMA; And notice is adjusted the data forwarding route via the MAG that described overload LMA transmits data;
Mobile Access Gateway MAG is used for the notice according to described routing management entity, adjusts the data forwarding route, with the data that the described overload of needs LMA transmits, changes into via described underloading LMA and transmits.
Establish corresponding tunnel between each MAG and each LMA;
Described MAG also is used for data that the described overload of needs LMA is transmitted, by and described underloading LMA between the tunnel be sent to described underloading LMA.
Described MAG also is used for the information according to each pre-configured LMA, initiates to set up tunneled requests to each LMA respectively; And, be established to the tunnel of each LMA according to the address information of setting up the described LMA that carries in the response message that each LMA returns;
Described LMA also is used for the address information of the MAG that carries according to the described request that receives, is established to the tunnel of described MAG; And return to described MAG and to set up response message.
Described LMA also is used for periodically adding up total quantity and self cpu busy percentage of the upstream data bag of transmitting in the quantity, current period of the upstream data bag of transmitting for each MAG, and reports to described routing management entity;
The total quantity of the upstream data bag of transmitting in the described LMA current period that described routing management entity also is used for each LMA is reported and the maximum threshold of setting and minimum threshold are relatively, or the cpu busy percentage that each LMA reports compared with the maximum threshold and the minimum threshold of setting, when both are arbitrary when exceeding maximum threshold, determine described LMA overload; When both are arbitrary when being lower than minimum threshold, determine described LMA underloading.
Described routing management entity also is used for according to the overload LMA that determines, and the quantity of the upstream data bag transmitted for each MAG of the described overload LMA that reports, and need to determine the MAG that adjusts, and notifies its adjustment data forwarding route.
Described routing management entity also is used for adjusting signaling by sending load to the described MAG that determines, and notifies described MAG to revise its data forwarding route, carries the address information of overload LMA and the address information of adjusted underloading LMA in the described signaling.
The network system that the embodiment of the invention provides also comprises: mobile node MN;
Described MAG also is used for when described MN switches, and sends the routing update signaling to described routing management entity; Described signaling carries the address prefix of described MN, and described MN switches address information preceding and switching back MAG;
Described routing management entity also is used for described routing update signaling and is forwarded to each LMA;
Described LMA also is used for adjusting route according to described routing update signaling, the feasible data that are sent to described MN, and back MAG transmits by described switching.
The embodiment of the invention also provides a kind of routing management entity, comprising:
Receiving element is used to receive the load information that each local mobile anchor LMA periodically reports;
Determining unit is used for the load information that reports according to each LMA, determines overload LMA and underloading LMA;
Notification unit is used to notify the Mobile Access Gateway MAG that transmits data via described overload LMA to adjust the data forwarding route, and the data that make described MAG will need described overload LMA to transmit are changed into via described underloading LMA and transmitted.
Described determining unit comprises:
Compare subelement, the total quantity of the upstream data bag of transmitting in the described LMA current period that is used for each LMA is reported and the maximum threshold of setting and minimum threshold compare, or the cpu busy percentage that each LMA reports is compared with the maximum threshold and the minimum threshold of setting;
Determine subelement, be used for determining described LMA overload when both are arbitrary when exceeding maximum threshold; When both are arbitrary when being lower than minimum threshold, determine described LMA underloading.
Described definite subelement also is used for according to the overload LMA that determines, and the quantity of the upstream data bag transmitted for each MAG of the described overload LMA that reports, and need to determine the MAG of adjustment.
Described receiving element also is used to receive the routing update signaling that MAG sends, and described routing update signaling is forwarded to each LMA; Described routing update signaling is for when MN switches, and by the signaling that is used to notify LMA adjustment route that MAG sends, the feasible data that are sent to described MN are transmitted by switching back MAG.
The beneficial effect of the embodiment of the invention is as follows:
The load-balancing method that the embodiment of the invention provides, system and device, in existing application on the basis of the proxy mobile IPv 6 network architecture, improve, a plurality of LMA and newly-increased network entity---routing management entity have been adopted, the load information that routing management entity periodically reports according to each LMA, determine overload LMA and underloading LMA, and notice is adjusted the data forwarding route via the MAG that overload LMA transmits data, make MAG will need to transship the data that LMA transmits, change into via underloading LMA and transmit.By above mechanism, routing management entity can by adjusting the data forwarding paths of MAG, carry out the equilibrium of data forwarding amount, thereby can dynamically realize the LMA load balancing in real time according to the loading condition of each LMA between overload LMA and underloading LMA.
Further, when MN switches, MAG by its new access sends the routing update signaling to routing management entity, routing management entity is transmitted to each LMA with this routing update signaling, make each LMA all adjust corresponding route, make the data that obtain this MN all pass through the new MAG that inserts and be transmitted to this MN, guaranteed to give corresponding MN with data forwarding exactly, thereby realized the load balancing of downlink data LMA by arbitrary LMA.
Description of drawings
Fig. 1 is the configuration diagram of existing proxy mobile IPv 6 network;
The network architecture schematic diagram of the load-balancing method that Fig. 2 provides for the embodiment of the invention;
Fig. 3 is for setting up the flow chart of many tunneling processes between LMA and the MAG;
Fig. 4 sets up tunneled requests signaling format schematic diagram for what the embodiment of the invention provided;
Fig. 5 sets up tunnel acknowledgment message signaling format schematic diagram for what the embodiment of the invention provided;
The flow chart of the load-balancing method of the upstream data that Fig. 6 provides for the embodiment of the invention;
The schematic diagram of the load notice signaling form that Fig. 7 provides for the embodiment of the invention;
The schematic diagram of signaling format is adjusted in the load that Fig. 8 provides for the embodiment of the invention;
The flow chart of the load-balancing method of the downlink data that Fig. 9 provides for the embodiment of the invention;
The schematic diagram of routing update signaling format in the load-balancing method that Figure 10 provides for the embodiment of the invention;
The structural representation of the network system that Figure 11 provides for the embodiment of the invention;
The routing management entity structural representation that Figure 12 provides for the embodiment of the invention;
Figure 13 provides the structural representation of order unit really for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, a kind of method provided by the invention, Apparatus and system are described in detail with specific embodiment.
The load-balancing method that the embodiment of the invention provides on the basis of the existing network architecture in PMIPv6 territory, has carried out further improvement to it.
Fig. 2 is a kind of new PMIPv6 network architecture schematic diagram that the embodiment of the invention provides, and has introduced a plurality of LMA and a new network entity---routing management entity in the PMIPv6 network domains.
In order to illustrate that only identified two LMA (LMA1 and LMA2) among Fig. 2, the embodiment of the invention is not done qualification for the quantity of LMA.
Load-balancing method in that the embodiment of the invention provides needs to set up in advance many tunnels between LMA and MAG, just mutual to set up the process of bidirectional tunnel between each MAG and each LMA.
With the process of setting up the tunnel between some MAG and each LMA is example, as shown in Figure 3, may further comprise the steps:
When step S301, MAG start, read a plurality of LMA information (information of LMA can be imported in the configuration file of MAG in advance by the PMIPv6 network manager) in its configuration file, send respectively and set up tunneled requests Tnl_request to each LMA.
Illustrated to set up the form of tunneled requests Tnl_request among Fig. 4.Set up the address information of having carried MAG in the tunneled requests at this.
After step S302, each LMA receive and set up tunneled requests,, be established to the tunnel of this MAG respectively according to the address information of the MAG that carries in this request;
Step S303, each LMA return to this MAG respectively and set up tunnel acknowledgment message Tnl_ack.
Illustrated to set up the form of tunnel acknowledgment message Tnl_ack among Fig. 5.Set up the address information that carries each LMA self in the tunnel acknowledgment message at this.
Step S304, this MAG set up the tunnel of corresponding M AG to LMA according to the address information of setting up each LMA that carries in the tunnel acknowledgment message that receives.
In the load-balancing method that the embodiment of the invention provides, the another one beneficial effect of setting up bidirectional tunnel in advance between each MAG and each LMA is, this mechanism can also be optimized the MN switching, promptly when MN when a MAG switches to another one MAG, LMA only need change route, and need when MN switches at every turn, not carry out the flow process that rebulids the tunnel, thereby can save the hand-off process time of MN, reduce packet loss and delay that MN switches.
After the proxy mobile IPv 6 network architecture was as shown in Figure 2 set up, mobile node MN forwarded the data to Correspondent Node by the tunnel between MAG and the LMA, realized network service.
In the real network communication process, the load-balancing method that the embodiment of the invention provides, can realize the dynamic load balancing of upstream data and downlink data between MAG and the LMA, below respectively at the load balancing process of upstream data and the load balancing process of downlink data, the load-balancing method that the embodiment of the invention is provided is described in detail.
At the load balancing process of upstream data, the load-balancing method that the embodiment of the invention provides as shown in Figure 6, may further comprise the steps:
Step S601, each LMA periodically add up total quantity and self cpu busy percentage for the upstream data bag of transmitting in the quantity of the upstream data bag of each MAG forwarding, the current period, and report to routing management entity.
Each LMA can report above-mentioned information by the mode that sends load notice signaling Load_info to routing management entity, and the Load_info signaling format as shown in Figure 7.
The loading condition that routing management entity can report each LMA writes the load tabulation of its maintenance, and periodically upgrades.
The load information that step S602, routing management entity periodically report according to each LMA is determined the LMA of overload and the LMA of underloading.
The concrete method of determining is as follows: routing management entity travels through the load tabulation of its maintenance, the total quantity of the upstream data bag of transmitting in each LMA current period that each LMA is reported and the maximum threshold of setting and minimum threshold are relatively, or the cpu busy percentage that each LMA reports compared with the maximum threshold and the minimum threshold of setting, when each exceeds maximum threshold when the total quantity of the upstream data bag of transmitting or cpu busy percentage, determine this LMA overload; When each is lower than minimum threshold when the total quantity of the upstream data bag of transmitting or cpu busy percentage, determine this LMA underloading.
For instance, when the cpu busy percentage of certain LMA has reached more than 80%, when perhaps the packet number of its forwarding is greater than 60000, promptly think this LMA overload.When the cpu busy percentage of certain LMA is lower than 40%, can think this underloading of LMA.
The concrete set pattern really of overload or underloading LMA then can change to some extent according to the situation of practical application, and the embodiment of the invention is not done qualification to concrete definite rule.
Step S603, routing management entity notice are adjusted the data forwarding route via the MAG that overload LMA transmits data.
In this step S603, the MAG that transmits data via overload LMA has a plurality of, only needs the data forwarding route of part MAG is wherein adjusted.Specifically the data forwarding route of which or which MAG is adjusted, can be determined in the following manner:
Routing management entity is according to the overload LMA that determines, and the quantity for the upstream data bag of each MAG forwarding that reports of the LMA of this overload, definite MAG that need carry out the route adjustment.For example, this overload LMA can be sorted for the quantity of the upstream data bag of each MAG forwarding, that MAG that forwarding uplink data bag quantity is maximum carries out the MAG that route is adjusted as needs, also MAG of adjusting as needs of the several MAG of that can the forwarding uplink data bag is many or the like.
With Fig. 1 is example, supposes that the overload LMA that routing management entity is determined is LMA1, and underloading LMA is LMA2.
The MAG that routing management entity is adjusted to needs sends load and adjusts signaling, notifies described MAG to revise its data forwarding route.This signaling carries the address information of overload LMA (LMA1) and the address information of adjusted underloading LMA (LMA2).
The form of this load adjustment signaling as shown in Figure 8.
Step S604, MAG receive the load of routing management entity transmission and adjust after the signaling, according to the signaling content, revise its data forwarding route, make its data that mail to LMA1 transmit by the tunnel between adjusted LMA2.
MAG can by set up in advance and LMA2 between the tunnel, the data with originally needing LMA1 to transmit are sent to LMA1, LMA1 transmits the data that receive through the tunnel to Correspondent Node.
From above-mentioned flow process as can be seen, routing management entity can be termly according to the loading condition of each LMA, adjust the data forwarding route of MAG in real time, with the data that need originally to transmit through overload LMA, change into via underloading LMA and transmit, realized the dynamically load balancing of upstream data between each LMA.
In order to realize the load balancing of downlink data between LMA and the MAG, must guarantee to be sent to the data of MN, can arrive the MAG of the current connection of MN by arbitrary LMA exactly, just realize the consistency of a plurality of LMA to MN routes, the load-balancing method that the embodiment of the invention provides when MN switches, is realized the load balancing of downlink data by following flow process, as shown in Figure 9, comprising:
MAG after step S901, MN switch sends the routing update signaling to routing management entity.
Suppose that MN switches to MAG2 by MAG1, after finishing existing P BU/PBA Signalling exchange between this MN and the LMA, MAG2 sends the routing update signaling to routing management entity, this signaling carries the address prefix of this MN, and MAG (MAG1) that connects before this MN switching and the address information of switching latter linked MAG (MAG2), signaling format is as shown in figure 10.
Step S902, routing management entity are forwarded to each LMA with the routing update signaling that receives.
Step S903, each LMA adjust route according to the routing update signaling that receives, and the feasible data that are sent to this MN are switched back MAG by this MN and transmitted.
Each LMA adjusts after the route, and all data that are sent to this MN all are sent to MAG2 by the tunnel between each LMA and the MAG2, have realized the correct forwarding of each LMA to MN downlink data and the load balancing of downlink data.
The embodiment of the invention also provides a kind of network system, as shown in figure 11, comprising: a plurality of local anchor point LMA 111, routing management entity 112 and Mobile Access Gateway MAG 113;
Local mobile anchor LMA 111 is used for periodically reporting self load information to routing management entity;
Routing management entity 112 is used for the load information that periodically reports according to each LMA, determines overload LMA and underloading LMA; And notice is adjusted the data forwarding route via the MAG that overload LMA transmits data;
Mobile Access Gateway MAG 113 is used for the notice according to routing management entity, adjusts the data forwarding route, and needs are transshipped the data that LMA transmits, and changes into via underloading LMA and transmits.
In the system shown in Figure 11, establish corresponding tunnel between each MAG and each LMA.
MAG also is used for needs are transshipped the data that LMA transmits, by and underloading LMA between the tunnel be sent to underloading LMA.
Further, MAG also is used for the information according to each pre-configured LMA, initiates to set up tunneled requests to each LMA respectively; And, be established to the tunnel of each LMA according to the address information of setting up the LMA that carries in the response message that each LMA returns.
LMA also is used for being established to the tunnel of this MAG according to the address information of setting up the MAG that tunneled requests carries that receives; And return to this MAG and to set up response message.
LMA also is used for periodically adding up total quantity and self cpu busy percentage of the upstream data bag of transmitting in the quantity, current period of the upstream data bag of transmitting for each MAG, and reports to routing management entity.
The total quantity of the upstream data bag of transmitting in the described LMA current period that routing management entity also is used for each LMA is reported and the maximum threshold of setting and minimum threshold are relatively, or the cpu busy percentage that each LMA reports compared with the maximum threshold and the minimum threshold of setting, when both are arbitrary when exceeding maximum threshold, determine this LMA overload; When both are arbitrary when being lower than minimum threshold, determine this LMA underloading.
Routing management entity also is used for according to the overload LMA that determines, and the quantity of the upstream data bag transmitted for each MAG of the overload LMA that reports, and need to determine the MAG that adjusts, and notifies this MAG adjustment data forwarding route.
Further, routing management entity also is used for adjusting signaling by sending load to the MAG that determines, and notifies this MAG to revise its data forwarding route, carries the address information of overload LMA and the address information of adjusted underloading LMA in the load adjustment signaling.
The network system that the embodiment of the invention provides as shown in figure 11, can also comprise: mobile node MN 114.
MAG also is used for when mobile node MN switches, and sends the routing update signaling to routing management entity; This routing update signaling carries the address prefix of MN, and this MN switches address information preceding and switching back MAG.
Routing management entity also is used for the routing update signaling and is forwarded to each LMA.
LMA also is used for adjusting route according to the routing update signaling, and the feasible data that are sent to this MN are transmitted by switching back MAG.
The embodiment of the invention also provides a kind of routing management entity, as shown in figure 12, comprising: receiving element 121, determining unit 122 and notification unit 123.Wherein:
Receiving element 121 is used to receive the load information that each local mobile anchor LMA periodically reports;
Determining unit 122 is used for the load information that reports according to each LMA, determines overload LMA and underloading LMA;
Really order unit 122 in the routing management entity that the embodiment of the invention provides as shown in figure 13, comprising: relatively subelement 131 and definite subelement 132.Wherein:
Compare subelement 131, the total quantity of the upstream data bag of transmitting in the LMA current period that is used for each LMA is reported and the maximum threshold of setting and minimum threshold compare, or the cpu busy percentage that each LMA reports is compared with the maximum threshold and the minimum threshold of setting;
Determine subelement 132, be used for determining the LMA overload when both are arbitrary when exceeding maximum threshold; When both are arbitrary when being lower than minimum threshold, determine the LMA underloading.
Really stator unit 132 in the routing management entity that the embodiment of the invention provides also is used for according to the overload LMA that determines, and the quantity of the upstream data bag transmitted for each MAG of the overload LMA that reports, and need to determine the MAG of adjustment.
Receiving element in the routing management entity that the embodiment of the invention provides also is used to receive the routing update signaling that MAG sends, and the routing update signaling is forwarded to each LMA; This routing update signaling is MN when switching, and notifies LMA to adjust the signaling of route by MAG being used to of sending, and makes the data that are sent to this MN, transmits by switching back MAG.
Routing management entity in the load-balancing method that the embodiment of the invention provides, system and the device; it is the network element that to realize the routing management function; its title can have multiple form of presentation; as can in the proxy mobile IPv 6 network, the form with load-balanced server realizing; perhaps the form with the network entity that adopts other titles realizes; as long as can realize the routing management function, do not break away from protection scope of the present invention, the embodiment of the invention does not limit this.
The load-balancing method that the embodiment of the invention provides, system and device, in existing application on the basis of the proxy mobile IPv 6 network architecture, improve, a plurality of LMA and newly-increased network entity---routing management entity have been adopted, the load information that routing management entity periodically reports according to each LMA, determine overload LMA and underloading LMA, and notice is adjusted the data forwarding route via the MAG that overload LMA transmits data, make MAG will need to transship the data that LMA transmits, change into via underloading LMA and transmit.By above mechanism, routing management entity can by adjusting the data forwarding paths of MAG, carry out the equilibrium of data forwarding amount, thereby can dynamically realize the load balancing of LMA in real time according to the loading condition of each LMA between overload LMA and underloading LMA.
Further, when MN switches, MAG by its new access sends the routing update signaling to routing management entity, routing management entity is transmitted to each LMA with this routing update signaling, make each LMA all adjust corresponding route, make the data that obtain this MN all pass through the new MAG that inserts and be transmitted to this MN, guaranteed to give corresponding MN with data forwarding exactly, thereby realized the load balancing of downlink data LMA by arbitrary LMA.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (18)
1. a load-balancing method is applied to the proxy mobile IPv 6 network, it is characterized in that, comprising:
The load information that routing management entity periodically reports according to each local mobile anchor LMA is determined overload LMA and underloading LMA;
Described routing management entity notice is adjusted the data forwarding route via the Mobile Access Gateway MAG that described overload LMA transmits data, and the data that make described MAG will need described overload LMA to transmit are changed into via described underloading LMA and transmitted.
2. the method for claim 1 is characterized in that, also comprises:
Each MAG sets up corresponding tunnel respectively with between each LMA in advance;
The data that described MAG will need described overload LMA to transmit are transmitted via described underloading LMA, comprising: described MAG will need the data of described overload LMA forwarding, by and described underloading LMA between the tunnel be sent to described underloading LMA;
Described underloading LMA transmits the described data that receive through the tunnel.
3. method as claimed in claim 2 is characterized in that, described each MAG sets up corresponding tunnel respectively with between each LMA, comprising:
When each MAG starts,, initiate to set up tunneled requests to each LMA respectively according to the information of each pre-configured LMA;
Described each LMA is established to the tunnel of described MAG according to the address information of the MAG that carries in the described request that receives; And return to described MAG and to set up response message;
Described MAG is established to the tunnel of described each LMA according to the address information of the LMA that carries in the described message that receives.
4. the method for claim 1 is characterized in that, each LMA comprises to described routing management entity load information reporting periodically:
Each LMA periodically adds up total quantity and self cpu busy percentage for the upstream data bag of transmitting in the quantity of the upstream data bag of each MAG forwarding, the current period, and reports to described routing management entity;
Described routing management entity is determined overload LMA and underloading LMA, comprising:
The total quantity of the upstream data bag of transmitting in the described LMA current period that described routing management entity reports each LMA and the maximum threshold of setting and minimum threshold are relatively, or the cpu busy percentage that each LMA reports compared with the maximum threshold and the minimum threshold of setting, when both are arbitrary when exceeding maximum threshold, determine described LMA overload; When both are arbitrary when being lower than minimum threshold, determine described LMA underloading.
5. method as claimed in claim 4 is characterized in that, described routing management entity notifies described MAG to adjust the data forwarding route, comprising:
Described routing management entity is according to the described overload LMA that determines, and the quantity of the upstream data bag of transmitting for each MAG that reports of described overload LMA, determines the MAG that needs adjustment, and notifies its adjustment data forwarding route.
6. method as claimed in claim 5 is characterized in that, described routing management entity is notified described MAG by following manner:
Described routing management entity is adjusted signaling by sending load to the described MAG that determines, and notifies described MAG to revise its data forwarding route, carries the address information of overload LMA and the address information of adjusted underloading LMA in the described signaling.
7. the method for claim 1 is characterized in that, also comprises:
When mobile node MN switched, the MAG after described MN switches sent the routing update signaling to described routing management entity; Described signaling carries the address prefix of described MN, and described MN switches the address information of preceding MAG and switching back MAG;
Described routing management entity is forwarded to each LMA with described routing update signaling;
Described each LMA adjusts route according to described routing update signaling, the feasible data that are sent to described MN, and back MAG transmits by described switching.
8. a network system is characterized in that, comprising:
A plurality of local mobile anchor LMA are used for periodically reporting self load information to routing management entity respectively;
Routing management entity is used for the load information that periodically reports according to each LMA, determines overload LMA and underloading LMA; And notice is adjusted the data forwarding route via the MAG that described overload LMA transmits data;
Mobile Access Gateway MAG is used for the notice according to described routing management entity, adjusts the data forwarding route, with the data that the described overload of needs LMA transmits, changes into via described underloading LMA and transmits.
9. system as claimed in claim 8 is characterized in that, establishes corresponding tunnel between each MAG and each LMA;
Described MAG also is used for data that the described overload of needs LMA is transmitted, by and described underloading LMA between the tunnel be sent to described underloading LMA.
10. system as claimed in claim 8 is characterized in that described MAG also is used for the information according to each pre-configured LMA, initiates to set up tunneled requests to each LMA respectively; And, be established to the tunnel of each LMA according to the address information of setting up the described LMA that carries in the response message that each LMA returns;
Described LMA also is used for the address information of the MAG that carries according to the described request that receives, is established to the tunnel of described MAG; And return to described MAG and to set up response message.
11. system as claimed in claim 8, it is characterized in that, described LMA also is used for periodically adding up total quantity and self cpu busy percentage of the upstream data bag of transmitting in the quantity, current period of the upstream data bag of transmitting for each MAG, and reports to described routing management entity;
The total quantity of the upstream data bag of transmitting in the described LMA current period that described routing management entity also is used for each LMA is reported and the maximum threshold of setting and minimum threshold are relatively, or the cpu busy percentage that each LMA reports compared with the maximum threshold and the minimum threshold of setting, when both are arbitrary when exceeding maximum threshold, determine described LMA overload; When both are arbitrary when being lower than minimum threshold, determine described LMA underloading.
12. system as claimed in claim 11 is characterized in that, described routing management entity, also be used for according to the overload LMA that determines, and the quantity of the upstream data bag transmitted for each MAG of the described overload LMA that reports, need to determine the MAG that adjusts, and notify its adjustment data forwarding route.
13. system as claimed in claim 12, it is characterized in that, described routing management entity, also be used for adjusting signaling by sending load to the described MAG that determines, notify described MAG to revise its data forwarding route, carry the address information of overload LMA and the address information of adjusted underloading LMA in the described signaling.
14. system as claimed in claim 8 is characterized in that, also comprises: mobile node MN; Described MAG also is used for when described MN switches, and sends the routing update signaling to described routing management entity; Described signaling carries the address prefix of described MN, and described MN switches address information preceding and switching back MAG;
Described routing management entity also is used for described routing update signaling and is forwarded to each LMA;
Described LMA also is used for adjusting route according to described routing update signaling, the feasible data that are sent to described MN, and back MAG transmits by described switching.
15. a routing management entity is characterized in that, comprising:
Receiving element is used to receive the load information that each local mobile anchor LMA periodically reports;
Determining unit is used for the load information that reports according to each LMA, determines overload LMA and underloading LMA;
Notification unit is used to notify the Mobile Access Gateway MAG that transmits data via described overload LMA to adjust the data forwarding route, and the data that make described MAG will need described overload LMA to transmit are changed into via described underloading LMA and transmitted.
16. routing management entity as claimed in claim 15 is characterized in that, described determining unit comprises:
Compare subelement, the total quantity of the upstream data bag of transmitting in the described LMA current period that is used for each LMA is reported and the maximum threshold of setting and minimum threshold compare, or the cpu busy percentage that each LMA reports is compared with the maximum threshold and the minimum threshold of setting;
Determine subelement, be used for determining described LMA overload when both are arbitrary when exceeding maximum threshold; When both are arbitrary when being lower than minimum threshold, determine described LMA underloading.
17. routing management entity as claimed in claim 16 is characterized in that, described definite subelement also is used for according to the overload LMA that determines, and the quantity of the upstream data bag transmitted for each MAG of the described overload LMA that reports, and need to determine the MAG of adjustment.
18. routing management entity as claimed in claim 15 is characterized in that, described receiving element also is used to receive the routing update signaling that MAG sends, and described routing update signaling is forwarded to each LMA; Described routing update signaling is MN when switching, and notifies LMA to adjust the signaling of route by MAG being used to of sending, and makes the data that are sent to described MN, transmits by switching back MAG.
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| CN101909014A (en) * | 2010-08-18 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system for dynamically regulating service routes |
| CN101909332A (en) * | 2010-08-30 | 2010-12-08 | 中国科学技术大学 | Method for effectively selecting LMAs (Local Mobility Anchors) during initial access of MN (Mobile Node) |
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| WO2018171309A1 (en) * | 2017-03-21 | 2018-09-27 | 中兴通讯股份有限公司 | Method and apparatus for selecting user plane function entity, and storage medium |
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