CN106936729A - Control method, system and broadband access network system that a kind of terminal device is accessed - Google Patents
Control method, system and broadband access network system that a kind of terminal device is accessed Download PDFInfo
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- CN106936729A CN106936729A CN201511005886.XA CN201511005886A CN106936729A CN 106936729 A CN106936729 A CN 106936729A CN 201511005886 A CN201511005886 A CN 201511005886A CN 106936729 A CN106936729 A CN 106936729A
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- connection management
- terminal
- flow
- terminal device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
Abstract
Control method, system and the broadband access network accessed the invention discloses a kind of terminal device, are related to communication technical field, and wherein method includes：Global connection management device is obtained acts on behalf of the terminal access quantity that the BAS Broadband Access Server BRAS of connection management device collection is carried；The terminal that global connection management device is based on accesses the flow loaded state that quantity determines BRAS；Flow loaded state is sent to path dispatching device by global connection management device；Path dispatching device accesses the user terminal quantity of BRAS according to the adjustment of flow loaded state.Control method of the invention, system and broadband access network, support session connection managerial ability of overall importance, the session connection number situation of multiple BRAS can simultaneously be grasped, can be in the case where the generation of certain BRAS Session Resources pond be in short supply, at any time by flow switch to other BRAS, realize that the Session Resources of multiple BRAS are flexibly cooperateed with, effectively reduce service disconnection, improve the Experience Degree of user.
Description
Technical field
The present invention relates to communication technical field, more particularly to the controlling party that a kind of terminal device is accessed
Method, system and broadband access network system.
Background technology
At present, bandwidth operator often uses multiple Access mode point BRAS
(Broadband Remote Access Server, Broadband Remote Access Server) or one
User and flow are shared in multiple ports on BRAS.By PPPoE (Point To Point
Protocol Over Ethernet, PPP over Ethernet) when carrying out subscriber dialing, meeting
Set up with first BRAS of response and be connected, that is, select this first BRAS conduct of response
Certificate server.After setting up connection between the terminal and the BRAS, the terminal is every pre- timing
Between, LCP (Link Control Protocol, link control association are set up between the BRAS
View) shake hands, with judge the BRAS whether failure.Generally occur in Metropolitan Area Network (MAN) single
The situation of the session connection resource scarcity of BRAS, the session number of each user generally in existing network
It is multiple, BRAS is frequently encountered the bottleneck of connection session number.At present, generally using resource not
The mode of dilatation is realized when sufficient, realizes that other accesses for connecting are asked using new purchase BRAS equipment
Topic, however, then also there is the vacant situation of connection resource in other BRAS equipments, this scheme
It is relatively costly, there is the wasting of resources, inflexible shortcoming from for the overall situation.
The content of the invention
In view of this, the invention solves the problems that a technical problem be to provide a kind of terminal device and access
Control method, system and broadband access network system.
The control method that a kind of terminal device is accessed, including：Global connection management device obtains generation
The terminal that the BAS Broadband Access Server BRAS of reason connection management device collection is carried accesses quantity；Its
In, the connection management device of acting on behalf of is deployed on the BRAS；The global connection management
The terminal that device is based on accesses the flow loaded state that quantity determines the BRAS；It is described complete
The flow loaded state is sent to path dispatching device by office's connection management device；The path
Dispatching device accesses the user terminal quantity of the BRAS according to flow loaded state adjustment.
According to one embodiment of present invention, further, including：The global connection management
The terminal that device carries the BRAS accesses quantity and is compared with the default first carrying threshold value
Compared with, carry threshold value if greater than or equal to described first, then this BRAS is set to busy condition；
The global connection management device is described to the path dispatching device transmitted traffic adjust instruction
The busy condition information is carried in flow adjust instruction；The path dispatching device control is in busy shape
The BRAS of state does not increase new terminal device connection.
According to one embodiment of present invention, further, including：If provided as busy condition
The BRAS carry terminal access quantity with default second carrying threshold value be compared, it is small
In or equal to the second carrying threshold value, then this BRAS is set to normal condition；Wherein, institute
State the second carrying threshold value and threshold value is carried less than described first；The global connection management device is to institute
Path dispatching device transmitted traffic adjust instruction is stated, carries described normal in the flow adjust instruction
Status information；The path dispatching device controls this to revert to the BRAS of normal condition can be increased
New terminal device connection.
According to one embodiment of present invention, further, the global connection management device from
The terminal access quantity for acting on behalf of connection management device acquisition BRAS carryings includes：The global connection
Managing device periodically sends company to the connection management device of acting on behalf of at predetermined intervals
Connect quantity detection instruction；The connection management device of acting on behalf of receives the connection quantity detection instruction
Afterwards, count that the BRAS is corresponding with terminal device and session Session numbers in hold mode
Amount；The Session quantity is returned to the global connecting tube by the connection management device of acting on behalf of
Reason device；Wherein, when the terminal device is accessed, the BRAS equipment is this terminal device
Set up Session and distribute IP address, after the terminal device is offline, the BRAS delete with
The corresponding Session of this terminal device.
According to one embodiment of present invention, further, including：The path dispatching device
BRAS flow status lists are set, wherein BRAS flow status list includes BRAS
MAC address, flow loaded state；The global connection management device
To the path dispatching device transmitted traffic adjust instruction；The path dispatching device is from the flow
MAC Address, the flow loaded state of BRAS are parsed in adjust instruction, updates described
BRAS flow status lists；Wherein, flow loaded state includes：Busy condition, normal condition.
According to one embodiment of present invention, further, including：Dispatched when the path and filled
Put when judging the flow loaded state for busy condition, then by terminal device in busy condition
The new network insertion request that one BRAS sends is switched to the 2nd BRAS in normal condition, by
2nd BRAS is for this terminal device sets up Session and distributes IP address.
According to one embodiment of present invention, further, including：When receiving terminal device
When the new network insertion sent to the BRAS in busy condition is asked, the path scheduling dress
Put and the MAC Address of terminal device, BRAS are obtained from the new network insertion request
MAC Address；As the MAC that the MAC Address for judging this BRAS is a BRAS
During address, then the new network insertion request is forwarded to described second by the path dispatching device
BRAS；Or, the path dispatching device sends offline notice message to corresponding terminal device,
And the MAC Address for sending the 2nd BRAS is set to this terminal, to cause this terminal device
2nd BRAS is dialled.
According to one embodiment of present invention, further, including：The path dispatching device
Determined to be arranged to busy condition number of times within the default cycle according to the BRAS flow status list
At least and be the BRAS of normal condition, using this BRAS as the 2nd BRAS.
The control system that a kind of terminal device is accessed, including：Global connection management device, is used for
The terminal that the BAS Broadband Access Server BRAS that Receiving Agent connection management device sends is carried accesses number
Amount, the flow loaded state that quantity determines the BRAS is accessed based on the terminal；Will be described
Flow loaded state is sent to path dispatching device；Connection management device is acted on behalf of, for gathering broadband
The terminal that access server BRAS is carried accesses quantity；Wherein, it is described to act on behalf of connection management device
It is deployed on the BRAS；The path dispatching device, for carrying shape according to the flow
State adjustment accesses the user terminal quantity of the BRAS.
According to one embodiment of present invention, further, the global connection management device,
Including：Connection detection module, the terminal for the BRAS to be carried accesses quantity and presets
First carrying threshold value be compared, if greater than or equal to it is described first carry threshold value, then by this
BRAS is set to busy condition；Connection adjusting module, for being sent to the path dispatching device
Flow adjust instruction, carries the busy condition information in the flow adjust instruction；Adjust in the path
Degree device, including：Connection management module, for controlling the BRAS in busy condition not increase newly
Terminal device connection.
According to one embodiment of present invention, further, the connection detection module, is used for
The terminal carried if provided as the BRAS of busy condition accesses quantity and is carried with default second
Threshold value is compared, and threshold value is carried less than or equal to described second, then be set to just this BRAS
Normal state；Wherein, described second threshold value is carried less than the described first carrying threshold value；The connection is adjusted
Mould preparation block, for the path dispatching device transmitted traffic adjust instruction, the flow adjustment to refer to
The normal state information is carried in order；The connection management module, for controlling this to revert to just
The BRAS of normal state can increase new terminal device connection.
According to one embodiment of present invention, further, the global connection management device,
Including：Connection quantity acquisition module, at predetermined intervals periodically to the generation
Reason connection management device sends connection quantity detection instruction；It is described to act on behalf of connection management device, bag
Include：Connection quantity acquisition module, after receiving the connection quantity detection instruction, counts institute
State that BRAS is corresponding with terminal device and session Session quantity in hold mode；Connection
Quantity sending module, mould is obtained for the Session quantity to be returned into the connection quantity
Block；Wherein, when the terminal device is accessed, the BRAS equipment is set up for this terminal device
Session simultaneously distributes IP address, and after the terminal device is offline, the BRAS is deleted and this end
The corresponding Session of end equipment.
According to one embodiment of present invention, further, the path dispatching device, bag
Include：Flow status maintenance module, for setting BRAS flow status lists, wherein, it is described
The list of BRAS flow status includes that the MAC address of BRAS, flow are carried
State；The MAC Address of BRAS, flow are parsed from the flow adjust instruction and carries shape
State, updates the BRAS flow status list；Wherein, flow loaded state includes：Busy shape
State, normal condition.
According to one embodiment of present invention, further, the connection management module, is used for
When the flow loaded state is judged for busy condition, then by terminal device in busy condition
The new network insertion request that one BRAS sends is switched to the 2nd BRAS in normal condition, by
2nd BRAS is for this terminal device sets up Session and distributes IP address.
According to one embodiment of present invention, further, when receiving terminal device to being in
When the new network insertion that first BRAS of busy condition sends is asked, the connection management module is from institute
State MAC Address, the MAC ground of BRAS of acquisition terminal device in new network insertion request
Location；When the MAC Address that the MAC Address for judging this BRAS is a BRAS,
Then the new network insertion request is forwarded to the 2nd BRAS by the connection management module；Or
Person, the connection management module sends offline notice message to corresponding terminal device, and to this end
End sets the MAC Address for sending the 2nd BRAS, to cause this terminal device to described the
Two BRAS are dialled.
According to one embodiment of present invention, further, the connection management module is according to institute
State the list of BRAS flow status determine be arranged within the default cycle busy condition least number of times,
And be the BRAS of normal condition, using this BRAS as the 2nd BRAS.
A kind of broadband access network system, including：The control system that terminal device as described above is accessed
System.
Control method, system and broadband access network system that terminal device of the invention is accessed, support
Session connection managerial ability of overall importance, can simultaneously grasp the session connection number feelings of multiple BRAS
Condition, can be in the case where the generation of certain BRAS Session Resources pond be in short supply, at any time by flow switch
To other BRAS, realize that the Session Resources of multiple BRAS are flexibly cooperateed with.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it is aobvious and easy
Insight, drawings in the following description are only some embodiments of the present invention, common for this area
For technical staff, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the flow of the one embodiment for the control method accessed according to terminal device of the invention
Schematic diagram；
Fig. 2 is the stream of another embodiment of the control method accessed according to terminal device of the invention
Journey schematic diagram；
Fig. 3 is the signal of the one embodiment for the control system accessed according to terminal device of the invention
Figure；
Fig. 4 be according to terminal device of the invention access control system one embodiment in it is complete
The module diagram of office's connection management device；
Fig. 5 is the generation in the one embodiment for the control system accessed according to terminal device of the invention
Manage the module diagram of connection management device；
Fig. 6 is the road in the one embodiment for the control system accessed according to terminal device of the invention
The module diagram of footpath dispatching device；
Specific embodiment
The present invention is described more fully with reference to the accompanying drawings, wherein illustrating example of the invention
Property embodiment.Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the skill in the embodiment of the present invention
Art scheme is clearly and completely described, it is clear that described embodiment is only the present invention one
Section Example, rather than whole embodiments.Based on the embodiment in the present invention, this area is general
All other embodiment that logical technical staff is obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.With reference to each figure and embodiment to technical scheme
Carry out many descriptions.
Fig. 1 is the flow of the one embodiment for the control method accessed according to terminal device of the invention
Schematic diagram, as shown in Figure 1：
Step 101, global connection management device obtains the broadband for acting on behalf of connection management device collection
The terminal that access server BRAS is carried accesses quantity.Connection management device is acted on behalf of to be deployed in
On BRAS.
Step 102, the terminal that global connection management device is based on accesses the stream that quantity determines BRAS
Amount loaded state.
Flow loaded state is sent to path scheduling dress by step 103, global connection management device
Put.
Step 104, path dispatching device accesses the user of BRAS according to the adjustment of flow loaded state
Terminal quantity.
The control method that terminal device of the invention is accessed, it is proposed that connect schedulable for BRAS
Implementation, by introducing global connection management device, it is proposed that support that global session connects
Management method is connect, and the path Adjusted Option proposed towards BRAS realizes that the optimization of flow is adjusted
Degree, can to the full extent optimize resource, reduces cost.
BRAS is a kind of BNG (Broadband Network Gateway, broadband networks network diagram
Close), can also be that other different BNG or vBNG (virtual BNG), such as vBRAS are (empty
Intend BRAS) etc..Path dispatching device can be various access devices, for example, converge and access exchange
Machine etc..Acting on behalf of connection management device can correspond setting with BRAS, it is also possible to which many-one enters
Row is set, and acts on behalf of connection management device and the session connection number of BRAS is advertised into global connection in time
Managing device, and appropriate scheduling is carried out to flow by path dispatching device when needed.
Fig. 2 is the stream of another embodiment of the control method accessed according to terminal device of the invention
Journey schematic diagram, as shown in Figure 2：
Step 201, global connection management device is at predetermined intervals periodically to agency
Connection management device sends connection quantity detection instruction.Such as every 2 seconds to acting on behalf of connection management device
Send connection quantity detection instruction.
Step 202, act on behalf of connection management device receive connection quantity detection instruction after, statistics
BRAS is corresponding with terminal device and session Session quantity in hold mode.Agency connects
Connect managing device and Session quantity is returned into global connection management device.
When terminal device is accessed, BRAS equipment is for this terminal device sets up Session and distributes IP
Address, after terminal device is offline, BRAS deletes Session corresponding with this terminal device.Entirely
Office's connection management device and being acted on behalf of can be led to using various protocols between connection management device
Letter, including publicly-owned agreement and proprietary protocol, such as soap protocol etc..
Step 203, terminal that global connection management device carries BRAS access quantity with it is pre-
If first carrying threshold value be compared, if greater than or equal to first carry threshold value, then by this
BRAS is set to busy condition.Global connection management device is adjusted to path dispatching device transmitted traffic
Instruction, carries busy condition information in flow adjust instruction, dispatching device control in path is in busy condition
BRAS do not increase new terminal device connection.
The terminal carried if provided as the BRAS of busy condition accesses quantity and is carried with default second
Threshold value is compared, and threshold value is carried less than or equal to second, then this BRAS is set into normal shape
State, second carries threshold value carries threshold value less than first.Global connection management device is dispatched to path
Device transmitted traffic adjust instruction, normal state information is carried in flow adjust instruction.Dispatch in path
Device controls this to revert to the BRAS of normal condition can increase new terminal device connection.
Path dispatching device sets BRAS flow status lists, wherein BRAS flow status row
Table is etc. the MAC address, flow loaded state of BRAS.Overall situation connection
Managing device is adjusted to path dispatching device transmitted traffic adjust instruction, path dispatching device from flow
MAC Address, the flow loaded state of BRAS are parsed in instruction, BRAS flow shapes are updated
State list, flow loaded state includes：Busy condition, normal condition.
When path dispatching device judges flow loaded state for busy condition, then by terminal device to place
The new network insertion request sent in a BRAS of busy condition is switched in normal condition the
Two BRAS, by the 2nd BRAS for this terminal device sets up Session and distributes IP address.
Step 204, user terminal sends new network insertion request.
Step 205, when receive terminal device in busy condition a BRAS send it is new
When network insertion is asked, path dispatching device obtains terminal device from new network insertion request
The MAC Address of MAC Address, BRAS.When the MAC Address for judging this BRAS is
During the MAC Address of one BRAS, then new network insertion request is forwarded to the by path dispatching device
Two BRAS.
Or, path dispatching device sends offline notice message to corresponding terminal device, and to this
Terminal sets the MAC Address for sending the 2nd BRAS, to cause this terminal device to second
BRAS is dialled.Communication between path dispatching device and terminal can be assisted using ARP
View, PPPOE agreements etc..
Path dispatching device can be scheduled using various strategies, such as according to BRAS flow shapes
State list determination is arranged to busy condition least number of times within the default cycle and is normal condition
BRAS, using this BRAS as the 2nd BRAS.
Global connection management device realizes the connection number detection in multiple BRAS/vBRAS, obtains
Current connection number situation, by preposition with BRAS/vBRAS path dispatching device realize to
The scheduling of family connection, can manage the setting of the connection number threshold value of BRAS/vBRAS.Agency connects
Connecing managing device also has the function of connection number detection, and the connection number that can in real time understand BRAS is accounted for
Use situation.
The control method that terminal device in above-described embodiment is accessed, is connected by increasing in network side
Controller, on the one hand the connection occupancy situation of detectable BRAS, on the other hand exceedes in connection number
In the flow scheduling for Adding User is discontented with to connection number BRAS in the case of threshold value, so that real
The adjust automatically of existing flow, optimization resource, reduces cost.
As shown in Fig. 3 to 6, the present invention provides the control system that a kind of terminal device is accessed.Entirely
The broadband access clothes that office's connection management device 31 Receiving Agent connection management device 32,33 sends
Business device BRAS36,37 terminals for carrying access quantity.Global connection management device 31 is based on eventually
Terminate and determine BRAS36,37 flow loaded state into quantity.
Flow loaded state is sent to path dispatching device 34, generation by global connection management device 31
The reason collection BAS Broadband Access Server of connection management device 32,33 BRAS36,37 terminals for carrying
Access quantity.Act on behalf of connection management device 32,33 and be deployed in BRAS36 respectively, on 37.Road
Footpath dispatching device 34 is counted according to the user terminal 38,39 that the adjustment of flow loaded state accesses BRAS
Amount.
The terminal that connection detection module 311 carries BRAS accesses quantity and is held with default first
Carry threshold value to be compared, threshold value is carried if greater than or equal to first, be then set to this BRAS
Busy condition.Connection adjusting module 312 is to path dispatching device transmitted traffic adjust instruction, flow
Busy condition information is carried in adjust instruction.The control of connection management module 341 is in busy condition
BRAS does not increase new terminal device connection.
The terminal carried if provided as the BRAS of busy condition accesses quantity and is carried with default second
Threshold value is compared, less than or equal to second carry threshold value, then connection detection module 311 by this
BRAS is set to normal condition, and second carries threshold value carries threshold value less than first.Connection adjustment mould
Block 312 carries normal shape to path dispatching device transmitted traffic adjust instruction in flow adjust instruction
State information.Connection management module 341 control this BRAS for reverting to normal condition can increase newly
Terminal device connection.
Connection quantity acquisition module 312 is at predetermined intervals periodically to acting on behalf of connection management
Device sends connection quantity detection instruction.Connection quantity acquisition module 321 receives connection quantity inspection
After surveying instruction, statistics BRAS is corresponding with terminal device and session Session in hold mode
Quantity.Session quantity is returned to connection quantity acquisition module by connection quantity sending module 322
313。
Flow status maintenance module 342 sets BRAS flow status lists, BRAS flow shapes
State list is etc. the MAC address, flow loaded state of BRAS.Flow
State-maintenance module 342 parses the MAC Address of BRAS, stream from flow adjust instruction
Amount loaded state, updates BRAS flow status lists, and flow loaded state includes：Busy condition,
Normal condition.
Connection management module 341 when flow loaded state is judged for busy condition, then by terminal device
The new network insertion request sent to the BRAS in busy condition is switched in normal condition
The 2nd BRAS, by the 2nd BRAS for this terminal device set up Session and distribute IP ground
Location.
Please to the new network insertion that the BRAS in busy condition sends when terminal device is received
When asking, connection management module 341 obtains the MAC ground of terminal device from new network insertion request
Location, the MAC Address of BRAS.When the MAC Address for judging this BRAS is a BRAS
MAC Address when, then connection management module 341 by new network insertion request be forwarded to second
BRAS.Or, connection management module 341 sends offline notice report to corresponding terminal device
Text, and the MAC Address for sending the 2nd BRAS is set to this terminal, to cause this terminal device
2nd BRAS is dialled.
Connection management module 341 determines the quilt within the default cycle according to the list of BRAS flow status
It is set to busy condition least number of times and is the BRAS of normal condition, using this BRAS as second
BRAS。
The present invention provides a kind of broadband access network system, including：As above the control that terminal device is accessed
System processed.
Control method, system and broadband access network system that terminal device in above-described embodiment is accessed
System, supports session connection managerial ability of overall importance, can simultaneously grasp the session of multiple BRAS
Connection number situation, can at any time will in the case where the generation of certain BRAS Session Resources pond is in short supply
Flow switch is reduced and cost-effective on the whole to other BRAS, realizes multiple BRAS's
Session Resources are flexibly cooperateed with, and effectively reduce the service disconnection caused by BRAS congestions, are carried
The Experience Degree of user is risen.
The method of the present invention and system may be achieved in many ways.For example, can be by soft
Part, hardware, firmware or software, hardware, any combinations of firmware realize side of the invention
Method and system.The said sequence of the step of for method is of the invention merely to illustrate
The step of method, is not limited to order described in detail above, unless specifically stated otherwise.
Additionally, in certain embodiments, also the present invention can be embodied as recording journey in the recording medium
Sequence, these programs include the machine readable instructions for realizing the method according to the invention.Cause
And, the present invention also covering storage is situated between for performing the record of the program of the method according to the invention
Matter.
Description of the invention is given for the sake of example and description, and is not exhaustively
Or limit the invention to disclosed form.Common skill of many modifications and variations for this area
It is obvious for art personnel.Selection and description embodiment are to more preferably illustrate principle of the invention
And practical application, and make one of ordinary skill in the art it will be appreciated that the present invention is suitable so as to design
In the various embodiments with various modifications of special-purpose.
Claims (17)
1. the control method that a kind of terminal device is accessed, it is characterised in that including：
Global connection management device obtains the BAS Broadband Access Server for acting on behalf of connection management device collection
The terminal that BRAS is carried accesses quantity；Wherein, it is described act on behalf of connection management device be deployed in it is described
On BRAS；
The global connection management device is based on terminal access quantity and determines the BRAS's
Flow loaded state；
The flow loaded state is sent to path scheduling dress by the global connection management device
Put；
The path dispatching device accesses the use of the BRAS according to flow loaded state adjustment
Family terminal quantity.
2. control method as claimed in claim 1, it is characterised in that including：
The terminal that the global connection management device carries the BRAS accesses quantity and presets
First carrying threshold value be compared, if greater than or equal to it is described first carry threshold value, then by this
BRAS is set to busy condition；
The global connection management device to the path dispatching device transmitted traffic adjust instruction,
The busy condition information is carried in the flow adjust instruction；
BRAS of the path dispatching device control in busy condition does not increase new terminal device and connects
Connect.
3. control method as claimed in claim 2, it is characterised in that including：
The terminal carried if provided as the BRAS of busy condition accesses quantity and default second
Carry threshold value to be compared, it is less than or equal to described second and carries threshold value, then set this BRAS
It is set to normal condition；Wherein, described second threshold value is carried less than the described first carrying threshold value；
The global connection management device to the path dispatching device transmitted traffic adjust instruction,
The normal state information is carried in the flow adjust instruction；
The path dispatching device controls this to revert to the BRAS of normal condition can increase new end
End equipment is connected.
4. control method as claimed in claim 3, it is characterised in that the global connection management
Device accesses quantity from the terminal for acting on behalf of connection management device acquisition BRAS carryings to be included：
The global connection management device periodically connects to the agency at predetermined intervals
Connect managing device and send connection quantity detection instruction；
Described to act on behalf of after connection management device receives the connection quantity detection instruction, statistics is described
BRAS is corresponding with terminal device and session Session quantity in hold mode；
The Session quantity is returned to the global connecting tube by the connection management device of acting on behalf of
Reason device；
Wherein, when the terminal device is accessed, the BRAS equipment is set up for this terminal device
Session simultaneously distributes IP address, and after the terminal device is offline, the BRAS is deleted and this end
The corresponding Session of end equipment.
5. control method as claimed in claim 3, it is characterised in that including：
The path dispatching device sets BRAS flow status lists, wherein the BRAS flows
Amount status list includes MAC address, the flow loaded state of BRAS；
The global connection management device is to the path dispatching device transmitted traffic adjust instruction；
The path dispatching device parses the MAC ground of BRAS from the flow adjust instruction
Location, flow loaded state, update the BRAS flow status list；
Wherein, flow loaded state includes：Busy condition, normal condition.
6. control method as claimed in claim 5, it is characterised in that including：
When the path dispatching device judges the flow loaded state for busy condition, then by terminal
Equipment is switched in normal to the new network insertion request that the BRAS in busy condition sends
2nd BRAS of state, by the 2nd BRAS for this terminal device sets up Session and divides
With IP address.
7. control method as claimed in claim 6, it is characterised in that including：
Please to the new network insertion that the BRAS in busy condition sends when terminal device is received
When asking, the path dispatching device obtains terminal device from the new network insertion request
The MAC Address of MAC Address, BRAS；When the MAC Address for judging this BRAS is institute
When stating the MAC Address of a BRAS, then the path dispatching device is by the new network insertion
Request is forwarded to the 2nd BRAS；
Or, the path dispatching device sends offline notice message to corresponding terminal device, and
The MAC Address for sending the 2nd BRAS is set to this terminal, to cause this terminal device pair
2nd BRAS is dialled.
8. control method as claimed in claim 6, it is characterised in that including：
The path dispatching device is determined in the default cycle according to the BRAS flow status list
Inside be arranged to busy condition least number of times and be the BRAS of normal condition, using this BRAS as
2nd BRAS.
9. the control system that a kind of terminal device is accessed, it is characterised in that including：
Global connection management device, for the broadband access that Receiving Agent connection management device sends
The terminal that server B RAS is carried accesses quantity, and it is described to access quantity determination based on the terminal
The flow loaded state of BRAS；The flow loaded state is sent to path dispatching device；
Connection management device is acted on behalf of, the terminal for gathering BAS Broadband Access Server BRAS carryings connects
Enter quantity；Wherein, the connection management device of acting on behalf of is deployed on the BRAS；
The path dispatching device, described in being accessed according to flow loaded state adjustment
The user terminal quantity of BRAS.
10. control system as claimed in claim 9, it is characterised in that：
The global connection management device, including：
Connection detection module, for the terminal that carries the BRAS access quantity with it is default
First carrying threshold value is compared, and carries threshold value if greater than or equal to described first, then by this
BRAS is set to busy condition；
Connection adjusting module, for the path dispatching device transmitted traffic adjust instruction, institute
State and carry the busy condition information in flow adjust instruction；
The path dispatching device, including：
Connection management module, for controlling the BRAS in busy condition not increase new terminal device
Connection.
11. control systems as claimed in claim 10, it is characterised in that：
The connection detection module, carries for the BRAS if provided as busy condition
Terminal accesses quantity and is compared with the default second carrying threshold value, and it is less than or equal to described second
Threshold value is carried, then this BRAS is set to normal condition；Wherein, the second carrying threshold value is small
Threshold value is carried in described first；
The connection adjusting module, for referring to path dispatching device transmitted traffic adjustment
Order, the normal state information is carried in the flow adjust instruction；
The connection management module, can increase for controlling this to revert to the BRAS of normal condition
New terminal device connection.
12. control systems as claimed in claim 11, it is characterised in that：
The global connection management device, including：
Connection quantity acquisition module, at predetermined intervals periodically to the agency
Connection management device sends connection quantity detection instruction；
It is described to act on behalf of connection management device, including：
Connection quantity acquisition module, after receiving the connection quantity detection instruction, counts institute
State that BRAS is corresponding with terminal device and session Session quantity in hold mode；
Connection quantity sending module, for the Session quantity to be returned into the connection quantity
Acquisition module；
Wherein, when the terminal device is accessed, the BRAS equipment is set up for this terminal device
Session simultaneously distributes IP address, and after the terminal device is offline, the BRAS is deleted and this end
The corresponding Session of end equipment.
13. control systems as claimed in claim 11, it is characterised in that：
The path dispatching device, including：
Flow status maintenance module, for setting BRAS flow status lists, wherein, it is described
The list of BRAS flow status includes that the MAC address of BRAS, flow are carried
State；The MAC Address of BRAS, flow are parsed from the flow adjust instruction and carries shape
State, updates the BRAS flow status list；
Wherein, flow loaded state includes：Busy condition, normal condition.
14. control systems as claimed in claim 13, it is characterised in that：
The connection management module, for when the flow loaded state is judged for busy condition, then
Terminal device is switched everywhere to the new network insertion request that the BRAS in busy condition sends
In the 2nd BRAS of normal condition, by the 2nd BRAS for this terminal device is set up
Session simultaneously distributes IP address.
15. control systems as claimed in claim 14, it is characterised in that：
Please to the new network insertion that the BRAS in busy condition sends when terminal device is received
When asking, the connection management module obtains terminal device from the new network insertion request
The MAC Address of MAC Address, BRAS；When the MAC Address for judging this BRAS is institute
When stating the MAC Address of a BRAS, then the connection management module is by the new network insertion
Request is forwarded to the 2nd BRAS；
Or, the connection management module sends offline notice message to corresponding terminal device, and
The MAC Address for sending the 2nd BRAS is set to this terminal, to cause this terminal device pair
2nd BRAS is dialled.
16. control systems as claimed in claim 15, it is characterised in that：
The connection management module is determined in the default cycle according to the BRAS flow status list
Inside be arranged to busy condition least number of times and be the BRAS of normal condition, using this BRAS as
2nd BRAS.
A kind of 17. broadband access network systems, it is characterised in that：
Including：The control system that terminal device as described in claim 9 to 16 any one is accessed
System.
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