CN106899499A - A kind of open flows OpenFlow message loops perform method and device - Google Patents
A kind of open flows OpenFlow message loops perform method and device Download PDFInfo
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- CN106899499A CN106899499A CN201710072920.8A CN201710072920A CN106899499A CN 106899499 A CN106899499 A CN 106899499A CN 201710072920 A CN201710072920 A CN 201710072920A CN 106899499 A CN106899499 A CN 106899499A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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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
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2425—Traffic characterised by specific attributes, e.g. priority or QoS for supporting services specification, e.g. SLA
- H04L47/2433—Allocation of priorities to traffic types
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Abstract
Method and device is performed the embodiment of the invention discloses a kind of open flows OpenFlow message loops, interchanger is applied to, interchanger is created has binding Bundle to cache.Method includes：Receive the binding addition message Bundle Add Message that controller sends；OpenFlow message, OpenFlow message correspondence identification field and cycline rule are cached in Bundle cachings；After the execute instruction for Bundle cachings for receiving controller transmission, if determining that OpenFlow message needs to be performed by circulation according to the identification field cached in Bundle cachings, OpenFlow message is performed according to cycline rule circulation.Using the embodiment of the present invention, the occupancy of the signalling path resource and controller cpu resource between controller and interchanger is reduced.
Description
Technical field
The present invention relates to OpenFlow (open flows) technical field, more particularly to a kind of open flows OpenFlow message loops
Perform method and device.
Background technology
SDN (Software Defined Network, software defined network), is a kind of new network of Emulex network innovation framework, is
A kind of implementation of network virtualization.Its core concept is that the key-course of the network equipment is separated with forwarding, right to realize
The flexible control of network traffics, for the innovation of core network and application provides good platform.
At present, OpenFlow agreements are used between the controller and interchanger in SDN as key-course and the letter of forwarding
Make passage, controller that interchanger is configured and managed by the signalling path.Bundle (bundles can be used in OpenFlow agreements
Tie up) message mechanism batch performs operation, unified return to operating result.Controller very easily can pack sequence of operations
Performed on switches into atomic operation.
When controller needs a certain OpenFlow message of the execution on switches of periodic cycle, it is necessary to controller is all
Phase property sends identical OpenFlow message to interchanger.Controller periodically sends OpenFlow message and takes control to interchanger
Signalling path resource and controller cpu resource between device processed and interchanger.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of open flows OpenFlow message loops to perform method and device, with
Reduce the occupancy of the signalling path resource and controller cpu resource between controller and interchanger.
To reach above-mentioned purpose, method is performed the embodiment of the invention discloses a kind of open flows OpenFlow message loops,
Interchanger is applied to, the interchanger is created has binding Bundle to cache, and methods described includes：
Receive the binding addition message Bundle Add Message that controller sends；The Bundle Add Message
OpenFlow message, the corresponding identification field of OpenFlow message and cycline rule are carried, is used to refer in the identification field
Show that the flag that OpenFlow message loops are performed is set；
The Bundle caching in cache the OpenFlow message, the OpenFlow message correspondence identification field and
Cycline rule；
After the execute instruction for Bundle cachings for receiving controller transmission, if slow according to the Bundle
The identification field for depositing middle caching determines that the OpenFlow message needs to be performed by circulation, then held according to cycline rule circulation
The row OpenFlow message.
To reach above-mentioned purpose, the embodiment of the invention discloses a kind of open flows OpenFlow message loop performs devices,
Interchanger is applied to, the interchanger is created has binding Bundle to cache, and described device includes：Receiver module, cache module and
Circulation performing module, wherein,
The receiver module, the binding addition message Bundle Add Message for receiving controller transmission；It is described
Bundle Add Message carry OpenFlow message, the corresponding identification field of OpenFlow message and cycline rule, institute
The flag that state is used to indicate OpenFlow message loops to perform in identification field is set；
The cache module, for caching the OpenFlow message, the OpenFlow in Bundle cachings
Message correspondence identification field and cycline rule；
The circulation performing module, for receiving the execute instruction for Bundle cachings of controller transmission
Afterwards, if determining that the OpenFlow message needs to be performed by circulation according to the identification field cached in Bundle cachings,
The OpenFlow message is performed according to cycline rule circulation.
As seen from the above technical solutions, a kind of open flows OpenFlow message loops are the embodiment of the invention provides to perform
Method and device, is applied to interchanger, and the interchanger is created has Bundle to cache.Method includes：Receive what controller sent
Bundle Add Message；It is corresponding that the Bundle Add Message carry OpenFlow message, OpenFlow message
Identification field and cycline rule, the flag for being used to indicate OpenFlow message loops to perform in the identification field are set to
Position；The OpenFlow message, the OpenFlow message correspondence identification field and circulation are cached in Bundle cachings
Rule；After the execute instruction for Bundle cachings for receiving controller transmission, if being cached according to the Bundle
The identification field of middle caching determines that the OpenFlow message needs to be performed by circulation, then circulated according to the cycline rule and performed
The OpenFlow message.
Using the embodiment of the present invention, controller to interchanger without periodically sending OpenFlow message, it is only necessary to exchange
Machine sends an OpenFlow message, when interchanger determines OpenFlow message according to the identification field cached in Bundle cachings
When needing to be performed by circulation, you can perform the OpenFlow message according to cycline rule circulation.Reduce controller and interchanger
Between signalling path resource and controller cpu resource occupancy.
Certainly, implementing any product of the invention or method must be not necessarily required to while reaching all the above excellent
Point.
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 be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the flow signal that a kind of open flows OpenFlow message loops provided in an embodiment of the present invention perform method
Figure；
Fig. 2 is a kind of structural representation of open flows OpenFlow message loop performs devices provided in an embodiment of the present invention
Figure.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
In order to solve prior art problem, the embodiment of the invention provides a kind of open flows OpenFlow message loops and perform
Method and device.A kind of open flows OpenFlow message loops for being provided the embodiment of the present invention first below perform method and enter
Row is introduced.
It should be noted that a kind of open flows OpenFlow message loops provided in an embodiment of the present invention perform method and dress
Put, be preferably applied to interchanger.In actual applications, the interchanger can be special OpenFlow interchangers or support
The interchanger of OpenFlow.Wherein, special OpenFlow interchangers are designed exclusively for OpenFlow is supported.It is not propped up
The normal process flow on existing commercial interchanger is held, all data by the interchanger are all according to the pattern of OpenFlow
Forwarded.Support OpenFlow interchanger be on the basis of commercial switches add flow table, escape way and
OpenFlow agreements obtain the interchanger of OpenFlow characteristics.It had both had the forwarding module of conventional commercial switches,
There is the forwarding logic of OpenFlow again.Being created in the interchanger has binding Bundle to cache.Bundle is created in a switch
It is prior art to cache, and the embodiment of the present invention is not repeated it herein.
Fig. 1 is the flow signal that a kind of open flows OpenFlow message loops provided in an embodiment of the present invention perform method
Figure；The method can include：
S101：Receive the Bundle Add Message (binding addition message) that controller sends.
Wherein, the Bundle Add Message carry OpenFlow message, the corresponding identifier word of OpenFlow message
Section and cycline rule, the flag for being used to indicate OpenFlow message loops to perform in the identification field are set.
S102：The OpenFlow message, OpenFlow message correspondence is cached in Bundle cachings to identify
Field and cycline rule.
S103：After the execute instruction for Bundle cachings for receiving controller transmission, if according to described
The identification field cached in Bundle cachings determines that the OpenFlow message needs to be performed by circulation, then according to the circulation rule
Then circulation performs the OpenFlow message.
When using Bundle message mechanisms between controller and interchanger, controller leads to a series of OpenFlow message
Cross Bundle Add Message and be sent to interchanger；Be cached to these OpenFlow message in Bundle cachings by interchanger；When
When receiving binding triggering message Bundle Commit Message (i.e. for the execute instruction of Bundle cachings), will can be somebody's turn to do
The OpenFlow message of caching is all performed in Bundle cachings, and implementing result is returned into controller.
At present, Bundle Add Message forms are as follows：
struct ofp_bundle_add_msg{
struct ofp_header header；
uint32_t bundle_id；/*Identify the bundle.*/
uint16_t pad；/*Align to 64bits.*/
uint16_t flags；/*Bitmap of OFPBF_*flags.*/
struct ofp_header message；/*Message added to the bundle.*/
/*If there is one property or more,’message’is followed by:
*-Exactly(message.length+7)/8*8-(message.length)(between 0 and 7)
*bytes of all-zero bytes*/
/*Bundle Property list.*/
//struct ofp_bundle_prop_header properties[0]；/*Zero or more
properties.*/}；
Identification field flags is defined as follows in Bundle Add Message：
OFPBF_ATOMIC=1<<0 expression implication is that last position is 1 in the flags of 16, it is stipulated that OpenFlow message
After being performed to and being only performed once, the OpenFlow message is removed from Bundle.
OFPBF_ORDERED=1<<1 expression implication is that penultimate is 1 in the flags of 16, it is stipulated that OpenFlow
After message is performed once in order, the OpenFlow message is removed from Bundle.
In order that OpenFlow message can be performed by circulation, flags in Bundle Add Message is extended,
Flags is defined as follows in the Bundle Add Message of extension：
Flags increased an OFPBF_CYCLE field and represent for circulating in the Bundle Add Message of extension
Perform OpenFlow message.OFPBF_CYCLE=1<<2 expression implications are that antepenulatimate is 1 in the flags of 16, that is, identify
The flag (antepenulatimate in the flags of 16) for being used to indicate OpenFlow message loops to perform in field flags is set to
Position.After regulation OpenFlow message is performed according to cycling condition, the OpenFlow message is removed from Bundle.
Assuming that controller with the addition of 5 OpenFlow message in being cached to the Bundle in interchanger, respectively
OpenFlow message 1, OpenFlow message 2, OpenFlow message 3, OpenFlow message 4 and OpenFlow message 5, wherein,
The corresponding flags of OpenFlow message 1 is：OFPBF_ORDERED=1<<The corresponding flags of 1, OpenFlow message 2 is：
OFPBF_CYCLE=1<<The corresponding flags of 2, OpenFlow message 3 is：OFPBF_ORDERED=1<<1, OpenFlow message
4 corresponding flags are：OFPBF_ORDERED=1<<The corresponding flags of 1, OpenFlow message 5 is：OFPBF_ORDERED=
1<<1.When controller that interchanger is received send for Bundle cachings execute instruction after, according in Bundle cachings
The identification field (antepenulatimate in the flags of 16) of caching determines that OpenFlow message 2 needs to be circulated execution, then root
OpenFlow message 2 is performed according to cycline rule circulation.
In actual applications, cycline rule can include that cycle duration and circulation perform two cycling conditions of frequency；
Can also include that cycle-index and circulation perform two cycling conditions of frequency；Cycle-index and cycle duration can also be included
Two cycling conditions.
In one embodiment of this invention, above-mentioned cycline rule can be carried on the attribute word of Bundle Add Message
In Experiment (experiment) field that section is included, wherein, the Experiment fields carry User Defined data, the use
Include above-mentioned cycline rule in the self-defining data of family.
Carry the Experiment field definitions that the attribute field of the Bundle Add Message of cycline rule is included
It is as follows：
struct ofp_bundle_experimenter{
uint16_t type；/*OFPPDPT_EXPERIMENTER.*/
uint16_t length；/*Length in bytes of this property.*/
uint32_t experimenter；/*Experimenter ID which takes the same form as
in struct ofp_experimenter_header.*/
uint32_t cycle_type；/*Experimenter defined.*/
uint32_t cycle_fre；/ * Cycle excute frequency. circulation execution frequencies */
uint32_t cycle_duration；/ * Cycle excute time. cycle durations */
uint32_t cycle_times；/ * Cycle excute times. circulation execution number of times */
}；
In actual applications, can be only in the Experiment fields that the attribute field of Bundle Add Message is included
Carry cycle duration, circulation perform frequency and circulation perform number of times in any one；When can also carry circulation continuous
Between, circulation perform any two in frequency and cycle-index；Cycle duration, circulation can also perform frequency and follow simultaneously
Ring performs number of times.
In actual applications, can set cycle duration, circulation perform frequency and circulation perform number of times use it is excellent
First level, such as priority are followed successively by circulation and perform number of times, circulation execution frequency, cycle duration from high to low.
When only circulation continuous are carried in the Experiment fields that the attribute field of Bundle Add Message is included
Between, circulation perform frequency and circulation perform number of times in any one when, such as carry circulation perform frequency, it is true according to priority
Make another condition of OpenFlow message loops execution：Circulation performs number of times, then the cycle-index according to acquiescence and carrying
Circulation perform frequency cycle perform OpenFlow message.
Exemplary, it is assumed that for above-mentioned OpenFlow message 2, the corresponding Bundle Add of OpenFlow message 2
It is 1 time per second, default loop circulation only to be carried in the Experiment fields that the attribute field of Message is included and performs frequency
It is 60 times to perform number of times, then performed 1 time according to per second, performs 60 times (i.e. 1 minute duration) circulation and performs the OpenFlow
Message 2.
When in the Experiment fields that the attribute field of Bundle Add Message is included carry cycle duration,
When circulation performs any two in frequency and circulation execution number of times, then frequency is performed according to the cycle duration and circulation for carrying
Rate or circulation perform number of times and cycle duration or cycle-index and circulation performs frequency, and circulation performs OpenFlow and disappears
Breath.
Exemplary, it is assumed that for above-mentioned OpenFlow message 2, the corresponding Bundle Add of OpenFlow message 2
Cycle duration is carried in the Experiment fields that the attribute field of Message is included for 1 day, circulation performs frequency and is
1 time per second, then performed 1 time according to per second, perform circulation in 1 day and perform the OpenFlow message 2.
Assuming that being directed to above-mentioned OpenFlow message 2, the attribute of the corresponding Bundle Add Message of OpenFlow message 2
Carried in the Experiment fields that field is included circulation perform number of times be 50, circulation perform frequency be 1 time per second, then according to
It is per second to perform 1 time, perform 5 circulations and perform the OpenFlow message 2.
Assuming that being directed to above-mentioned OpenFlow message 2, the attribute of the corresponding Bundle Add Message of OpenFlow message 2
It is 60 circulation to be carried in the Experiment fields that field is included and performs number of times, and cycle duration is 1 hour, i.e., per minute
Perform 1 time；Then performed 1 time according to per minute, perform 60 times (i.e. 1 hour duration) circulation and perform the OpenFlow message 2.
When in the Experiment fields that the attribute field of Bundle Add Message is included simultaneously carry circulation continuous
When time, circulation perform frequency and circulation execution number of times, then the condition of control circulation is determined according to priority：Circulation performs secondary
Number and circulation perform frequency.Number of times is performed according to circulation and circulation performs frequency cycle and performs OpenFlow message.
It should be noted that above-mentioned with OpenFlow message 1, OpenFlow message 2, OpenFlow message 3, OpenFlow
Illustrated as a example by message 4 and OpenFlow message 5, an instantiation only of the invention is not constituted to limit of the invention
It is fixed.
In another embodiment of the invention, when message Bundle Close are closed in the binding for receiving controller transmission
Message (i.e. for the out code of Bundle cachings) or binding destroy message Bundle Discard Message (i.e.
For the destruction instruction of Bundle cachings) when, stop performing the OpenFlow message.Specifically, being sent when controller is received
Bundle Close Message or Bundle Discard Message when, it is all in Bundle cachings
OpenFlow message can all be deleted, even if some OpenFlow message are performed by circulation can also be eliminated, execution
OpenFlow message is stopped.
Using embodiment illustrated in fig. 1 of the present invention, controller to interchanger without periodically sending OpenFlow message, it is only necessary to
An OpenFlow message is sent to interchanger, when interchanger determines according to the identification field cached in Bundle cachings
When OpenFlow message needs to be performed by circulation, you can perform the OpenFlow message according to cycline rule circulation.Reduce control
The occupancy of signalling path resource and controller cpu resource between device processed and interchanger.
Corresponding with above-mentioned embodiment of the method, the embodiment of the present invention also provides a kind of open flows OpenFlow message loops
Performs device.
Fig. 2 is a kind of structural representation of open flows OpenFlow message loop performs devices provided in an embodiment of the present invention
Figure；The device can include：Receiver module 201, cache module 202 and circulation performing module 203, wherein,
Receiver module 201, the binding addition message Bundle Add Message for receiving controller transmission；It is described
Bundle Add Message carry OpenFlow message, the corresponding identification field of OpenFlow message and cycline rule, institute
The flag that state is used to indicate OpenFlow message loops to perform in identification field is set；
In actual applications, the cycline rule of the embodiment of the present invention can include：Cycle duration and circulation perform frequency
Rate；Can also include that cycle-index and circulation perform frequency；Cycle-index and cycle duration can also be included.
In actual applications, the cycline rule of the embodiment of the present invention can be carried on the attribute of Bundle Add Message
In the experimental field that field is included.
Cache module 202, disappears for caching the OpenFlow message, the OpenFlow in Bundle cachings
Breath correspondence identification field and cycline rule；
Circulation performing module 203, for receiving the execute instruction for Bundle cachings of controller transmission
Afterwards, if determining that the OpenFlow message needs to be performed by circulation according to the identification field cached in Bundle cachings,
The OpenFlow message is performed according to cycline rule circulation.
In another embodiment of the invention, OpenFlow message loops performs device provided in an embodiment of the present invention may be used also
To include：Stopping modular (not shown), for receiving the closing for Bundle cachings of controller transmission
Or after destroying instruction, stop performing the OpenFlow message.
Using embodiment illustrated in fig. 2 of the present invention, controller to interchanger without periodically sending OpenFlow message, it is only necessary to
An OpenFlow message is sent to interchanger, when interchanger determines according to the identification field cached in Bundle cachings
When OpenFlow message needs to be performed by circulation, you can perform the OpenFlow message according to cycline rule circulation.Reduce control
The occupancy of signalling path resource and controller cpu resource between device processed and interchanger.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.And, term " including ", "comprising" or its any other variant be intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
Each embodiment in this specification is described by the way of correlation, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.Especially for device reality
Apply for example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring to embodiment of the method
Part explanation.
One of ordinary skill in the art will appreciate that realize that all or part of step in above method implementation method is can
Completed with instructing the hardware of correlation by program, described program can be stored in computer read/write memory medium,
The storage medium for obtaining designated herein, such as：ROM/RAM, magnetic disc, CD etc..
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (8)
1. a kind of open flows OpenFlow message loops perform method, it is characterised in that be applied to interchanger, the interchanger wound
Binding Bundle cachings are had, methods described includes：
Receive the binding addition message Bundle Add Message that controller sends；The Bundle Add Message are carried
OpenFlow message, the corresponding identification field of OpenFlow message and cycline rule, are used to indicate in the identification field
The flag that OpenFlow message loops are performed is set；
The OpenFlow message, the OpenFlow message correspondence identification field and circulation are cached in Bundle cachings
Rule；
After the execute instruction for Bundle cachings for receiving controller transmission, if according in Bundle cachings
The identification field of caching determines that the OpenFlow message needs to be performed by circulation, then perform institute according to cycline rule circulation
State OpenFlow message.
2. method according to claim 1, it is characterised in that the cycline rule includes：
Cycle duration and circulation perform frequency；
Or cycle-index and circulation perform frequency；
Or cycle-index and cycle duration.
3. method according to claim 1, it is characterised in that the cycline rule is carried on the Bundle Add
In the experimental field that the attribute field of Message is included.
4. method according to claim 1, it is characterised in that described according to cycline rule circulation is performed
After OpenFlow message, methods described also includes：
After the closing or destruction instruction for Bundle cachings for receiving controller transmission, stopping performs described
OpenFlow message.
5. a kind of open flows OpenFlow message loop performs devices, it is characterised in that be applied to interchanger, the interchanger wound
Binding Bundle cachings are had, described device includes：Receiver module, cache module and circulation performing module, wherein,
The receiver module, the binding addition message Bundle Add Message for receiving controller transmission；It is described
Bundle Add Message carry OpenFlow message, the corresponding identification field of OpenFlow message and cycline rule, institute
The flag that state is used to indicate OpenFlow message loops to perform in identification field is set；
The cache module, for caching the OpenFlow message, the OpenFlow message in Bundle cachings
Correspondence identification field and cycline rule；
The circulation performing module, for receive controller transmission for the Bundle caching execute instruction after,
If the identification field according to being cached in Bundle cachings determines that the OpenFlow message needs to be performed by circulation, basis
The cycline rule circulation performs the OpenFlow message.
6. device according to claim 5, it is characterised in that the cycline rule includes：
Cycle duration and circulation perform frequency；
Or cycle-index and circulation perform frequency；
Or cycle-index and cycle duration.
7. device according to claim 5, it is characterised in that the cycline rule is carried on the Bundle Add
In the experimental field that the attribute field of Message is included.
8. device according to claim 5, it is characterised in that described device also includes：Stopping modular, for receiving
After closing or destruction instruction for Bundle cachings that controller sends, stop performing the OpenFlow message.
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| CN109257202B (en) * | 2017-07-14 | 2022-03-29 | 中国移动通信有限公司研究院 | Method for network configuration by introducing action cycle and corresponding network element |
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