A kind of wireless network dicing method based on section flow table
Technical field
The invention belongs to mobile communication technology field, it is related to a kind of wireless network dicing method based on section flow table.
Background technology
5G is mainly used in meeting the later mobile communication demand of the year two thousand twenty as new generation of wireless mobile communications network.
Under the mobile Internet of high speed development and ever-increasing internet of things service demand are promoted jointly, it is desirable to which 5G possesses inexpensive, low
Energy consumption, it is safe and reliable the characteristics of, simultaneous transmission speed lifted 10 to 100 times, hardware circuit solution reaches 10Gbit/s, end-to-end
Time delay reaches Millisecond, and connection density of equipment increases by 10 to 100 times, and flux density lifts 1000 times, spectrum efficiency lifting 5 to 10
Times, Consumer's Experience can be ensured under the speed of 500km/h.In order to meet the various demands of 5G, then Radio Transmission Technology aspect
Mainly technology etc. is taken with large-scale antenna array technology, new multiple access technology, full rate.In terms of the network architecture, future
5G will be based on software defined network (softwaredefinednetworking, SDN), network function virtualization and cloud computing
The more flexible, intelligent and high-efficiency and the isomery coalescing network system of opening of technology.
SDN is generally approved as a kind of new technology to network with significant impact, its value by industry.SDN skills
Art is an of overall importance, subversive network change technology, and it transforms traditional " closing " network using the pattern of IT technologies,
Network capabilities is redefined using the method for software definition so that network moves towards dynamic from static state, solves nothing in legacy network
Some problems that method is avoided, including it is slow to the response speed of changes in demand, the virtualization of network and high fortune cannot be realized
Dimension cost and equipment cost etc., are that network Development brings new opportunity.
At this stage, in the objective network selection of SDN deployment, operator mainly aims at MPLS backbone networks, cloud business network
And cross-layer transmission network, additionally including metropolitan area convergence, optical-fiber network and wireless access network.At present, for SDN frameworks in nothing
The main discussion and research also focused in the network architecture of research of line access network.And apply in wireless network also SDN
There are some technological challenges.Realize that software defined network is at least required to definition section and isolates these sections, and
Also require that the network equipment can be measured, and to their state of controller reporting, these requirements are using wireless transmission medium
Under the conditions of be all difficult to.
The content of the invention
In view of this, it is an object of the invention to provide a kind of wireless network dicing method based on section flow table, can
Realize the separation of data forwarding and control plane.
To reach above-mentioned purpose, the present invention provides following technical scheme:
A kind of wireless network dicing method based on section flow table, methods described includes:
During Openflow sections flow table in SDN frameworks extended into Radio Access Network, the matching of the section flow table
Field includes distal end emitting head RRH fields and baseband processing unit BBU fields;
According to different section trigger conditions, at least one section network of generation;Wherein, the section network includes static state
Slice type network, Dynamic Slicing formula network and semi-static slice type network.
Further, the RHH fields include:
Entity RRH physical labels;RRH physical ports;The transmission power of base station;The quantity of antenna for base station;Modulating-coding plan
Slightly;Channel propagation model;Propagate frame structure;Entity Fronthaul physical labels;Fronthaul physical ports;Fronthaul
Time delay limitation;The capacity limit of Fronthaul.
Further, the BBU fields include:
Entity B BU physical labels;BBU physical ports;Source scheduling mode;Protocol stack arrangement;Bandwidth allocation quantity.
Further, the static slicing formula network is generated in the following manner:
Operator or service provider send section request by application programming interface API to SDN controllers;
The SDN controllers are according to network dicing strategy generation section flow table data;
Section flow table information in the SDN controllers modification BBU and RRH, to form new section network;
Data transmission channel is set up, when there is user to need to access the new section network, is carried out with section flow table
Match somebody with somebody, form data forwarding plane.
Further, the Dynamic Slicing formula network is generated in the following manner:
The network section request that user sends reports SDN controllers by RRH;
The SDN controllers form section flow table parameter according to current network state information and section generation strategy;
The SDN controllers change the section flow table of RRH and BBU by Signalling exchange;
The user sets up data forwarding plane according to matching section flow table.
Further, the semi-static slice type network is generated in the following manner:
In existing static slicing formula network, cut into slices in the event of the new network that user sends and asked, according to life
Mode into Dynamic Slicing formula network generates new network.
Further, the Openflow sections flow table in SDN frameworks is extended into Radio Access Network includes:
At least one section flow table is added in each access network entity.
Further, methods described also includes:
By SDN controllers to it is described section flow table be controlled, and by it is described section flow table matching forward into
Row data forwarding, to realize the separation of data forwarding and control plane.
The beneficial effects of the present invention are:
1) during the flow table in SDN frameworks is expanded to Radio Access Network by the present invention, by SDN controllers to section flow table
Be controlled, data forwarding then carries out matching forwarding by flow table of cutting into slices, it is achieved thereby that data forwarding and control plane point
From.The matching field of flow table of cutting into slices mainly includes RRH fields and BBU fields, and two parts correspond to the thing of Radio Access Network respectively
The network parameter and forwarding process and port of reason layer and two, three layers of correlation.
2) be divided into for slicing mode according to the difference of section network generation trigger condition by the present invention:It is static slicing mode, dynamic
State slicing mode and semi-static slicing mode.The main implementation method of various slicing modes is all to network by SDN controllers
Section flow table is modified, and data flow is matched so as to realize the forwarding of data flow with section flow table, and the method is fine
Realize network control separated with data forwarding.Also, by the control of SDN controllers, can fast and easily realize not
With the modification of the association attributes of the section flow table of section network, the specific of each section network is preferably distinguished with this, to each
Section network carries out the configuration of differentiation, also allows for the maintenance of each section network.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carries out
Explanation:
Fig. 1 is the wireless network section schematic diagram of a scenario based on section flow table in the embodiment of the present invention;
Fig. 2 is the structural representation of section flow table in the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of static slicing mode in the embodiment of the present invention;
Fig. 4 is the schematic flow sheet of Dynamic Slicing mode in the embodiment of the present invention;
Fig. 5 is the schematic flow sheet of semi-static slicing mode in the embodiment of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
The application implementation method provides a kind of wireless network dicing method based on section flow table, and methods described includes:
During Openflow sections flow table in SDN frameworks extended into Radio Access Network, the matching of the section flow table
Field includes distal end emitting head RRH fields and baseband processing unit BBU fields;
According to different section trigger conditions, at least one section network of generation;Wherein, the section network includes static state
Slice type network, Dynamic Slicing formula network and semi-static slice type network.
Specifically, referring to Fig. 1, Fig. 1 is the wireless network section scene based on section flow table provided in an embodiment of the present invention
Schematic diagram.In case of the present invention, using CRAN frameworks, will traditional base station be divided at distal end emitting head (RRH) and base band
Reason unit (BBU), it is contemplated that SDN frameworks are introduced into wireless access network, so adding SDN controllers to control RRH and BBU
System.In the present embodiment, at least one section flow table can be added in each access network entity (RRH and BBU).Entirely
The upstream data repeating process of network is:User UE is connected by wireless channel with RRH first, RRH again by data by it is preceding to
Link (Fronthaul) is transmitted to BBU, and last BBU forwards the data to packet-based core networks (EPC).As can be seen that passing through in figure
SDN controllers to it is described section flow table be controlled, and by it is described section flow table matching forward carry out data forwarding, with
Realize the separation of data forwarding and control plane.
Referring to Fig. 2, Fig. 2 is the structural representation of section flow table provided in an embodiment of the present invention, as can be seen that whole in figure
The matching field of table includes two fields of RRH and BBU.Wherein RRH fields relate generally to the letter such as physical layer parameter and forwarding port
Breath, wherein, RRH ID presentation-entity RRH physics sign;RRHPort represents RRH physical ports, i.e., virtual RRH equipment sign;
Transmit Power represent the transmission power of base station;MIMO represents the quantity of antenna for base station;MCS represents modulating-coding strategy;
Channel Model tables show channel propagation model;Frame Type represent propagation frame structure;Fronthaul ID presentation-entity
Fronthaul physics is indicated;FronthaulPort represents Fronthaul physical ports, i.e., virtual Fronthaul equipment sign;
Delay Constraint represent the time delay limitation of Fronthaul;Capacity Constraint represent the appearance of Fronthaul
Amount limitation.
In the present embodiment, BBU fields relate generally to two, three layers of processing relevant information, wherein:The field is mainly wrapped
The content for containing includes:BBU ID presentation-entity BBU physics is indicated;BBUPort represents BBU physical ports, i.e., virtual BBU equipment mark
Show;Schedule Type represent source scheduling mode;Protocol presentation protocols stack is configured;Bandwidth represents bandwidth allocation
Quantity.
In the present embodiment, a kind of wireless network dicing method based on section flow table that the present invention is provided, by SDN
Controller is controlled to section flow table, realizes the generation of different section networks, according to section network generation trigger condition not
It is same to be divided into:Static slicing mode, Dynamic Slicing mode and semi-static slicing mode.
Referring to Fig. 3, Fig. 3 is static slicing mode schematic flow sheet provided in an embodiment of the present invention.As shown in figure 3, quiet
Under state slicing mode, operator or service provider actively can send section request to SDN controllers, and SDN controllers can root
According to network dicing strategy generation section flow table data.Then SDN controllers are by changing the section flow table information in BBU and RRH
New network section is formed, data transmission channel is set up.End user is connected in network by way of matching section flow table
Form data transfer plane.
Referring to Fig. 4, Fig. 4 is Dynamic Slicing mode schematic flow sheet provided in an embodiment of the present invention.As shown in figure 4, dynamic
Under state slicing mode, the network section request that user sends first passes through RRH and reports SDN controllers;Then, SDN controls
Device forms specific section flow table parameter further according to current network state information and section generation strategy;Last SDN controllers lead to
Cross the section flow table that Signalling exchange changes RRH and BBU.Data transmission channel is further formed, end user cuts into slices by matching
The mode of flow table, is connected to formation data transfer plane in network.
Referring to Fig. 5, Fig. 5 is semi-static slicing mode schematic flow sheet provided in an embodiment of the present invention.As shown in figure 5, can
It is in existing static slicing formula network, to be cut into slices in the event of the new network that user sends and asked, then dynamic according to generation
The mode of state slice type network generates new network.Specifically, under semi-static slicing mode, user is in original data transfer
New section request is generated in plane.Now user will send new network section request, and report SDN controls by RRH
Device processed;Then, SDN controllers form specific section flow table ginseng further according to current network state information and section generation strategy
Number;Last SDN controllers change the section flow table of RRH and BBU by Signalling exchange.New data transfer is further formed to lead to
Road, end user is connected in network and forms this new data transmission plane by way of matching section flow table.
The beneficial effects of the present invention are:
1) during the flow table in SDN frameworks is expanded to Radio Access Network by the present invention, by SDN controllers to section flow table
Be controlled, data forwarding then carries out matching forwarding by flow table of cutting into slices, it is achieved thereby that data forwarding and control plane point
From.The matching field of flow table of cutting into slices mainly includes RRH fields and BBU fields, and two parts correspond to the thing of Radio Access Network respectively
The network parameter and forwarding process and port of reason layer and two, three layers of correlation.
2) be divided into for slicing mode according to the difference of section network generation trigger condition by the present invention:It is static slicing mode, dynamic
State slicing mode and semi-static slicing mode.The main implementation method of various slicing modes is all to network by SDN controllers
Section flow table is modified, and data flow is matched so as to realize the forwarding of data flow with section flow table, and the method is fine
Realize network control separated with data forwarding.Also, by the control of SDN controllers, can fast and easily realize not
With the modification of the association attributes of the section flow table of section network, the specific of each section network is preferably distinguished with this, to each
Section network carries out the configuration of differentiation, also allows for the maintenance of each section network.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment to be described in detail the present invention, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.