CN107634917B - A kind of scheduling unit of priority scheduling, scheduling model and implementation method - Google Patents
A kind of scheduling unit of priority scheduling, scheduling model and implementation method Download PDFInfo
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Abstract
A kind of scheduling unit of priority scheduling, scheduling model and implementation method, it is related to network flow management field, different type node is established as scheduling unit, and then form scheduling model, priority scheduling is carried out according to service priority preference pattern, on the basis of queue and port two-level scheduler, increase the scheduling node of the intermediate level, 8 priority schedulings are realized by modes such as combination multiplexings, the scheduling parameter of each node is configurable, scalability is considered simultaneously, realizes queue, middle layer, the scheduling feature of each level in port.The present invention realizes the configuration of priority weighting on different nodes respectively, realizes CIR and EIR function, adapts to the business demand of different scenes, avoids the scheduling wasting of resources.
Description
Technical field
The present invention relates to network flow management field, in particular to a kind of scheduling unit of priority scheduling, scheduling
Model and implementation method.
Background technique
The high speed development of computer network at present, so as to bandwidth, delay, the voice of jitter-sensitive, image, significant data
More and more in transfers on network.In order to provide data transmission performance different promise and guarantee, it is widely used for QoS
(Quality of Service, service quality) technology guarantees network transmission quality.
In general, PTN (Packet Transport Network, Packet Transport Network) equipment is to realize network service
Differentiated Services provide CS7, CS6, EF, AF4, AF3, AF2, AF1 and BE totally 8 kinds of different business service ranks, are specific
Business provides service required for its, packet loss, delay, shake and in terms of obtain expected service level.
However, increasingly complex scene would generally be faced in practical application, if the transmission device of backbone network is for multiple
VLAN (Virtual Local Area Network, virtual LAN), it is desirable to provide 8 priority schedulings based on VLAN and
Scheduling feature between multiple VLAN, this needs to provide HQoS (HierarchicalQuality of Service, the clothes of stratification
Business quality) function realize multistage QoS scheduling.
Currently, many PTN devices in the market are all less perfect for the support of HQos function, the multi-stage scheduling such as provided
It is the scheduling model of fixed three-level or Pyatyi, and when practical application only needs the scheduling of two-stage, scheduling resource there is sternly
The waste of weight.In addition, the port of equipment can only be configured to a kind of scheduling attributes of HQoS or QoS, in certain special scenes, such as
Dedicated network and public network have been accessed simultaneously, and public network usually requires to distinguish the different types of service such as voice, data, then
It is unsatisfactory for schedulable condition, the business demand of different scenes can not be adapted to.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of scheduling lists of priority scheduling
Member, scheduling model and implementation method, adapt to the business demand of different scenes, avoid the scheduling wasting of resources.
To achieve the above objectives, the present invention takes a kind of scheduling unit of priority scheduling, comprising:
Queue nodes Q_node has a highest priority SP0, is only used for queue polling dispatching；
The intermediate node A_node of 4SP scheduling method, the priority SP0 to SP3 including 4 from high to low, for centre
Grade scheduling, is scheduled according to priority；
The intermediate node B_node of WFQ scheduling method has a highest priority SP0, dispatches for intergrade, according to power
Graded dispatching is carried out again；
Port node P_node, the priority SP0 to SP10 including 11 from high to low, wherein SP9 supports WFQ to dispatch mould
Formula, SP10 are reserved；
The first combination intermediate node A_node_ext, is combined into mode of extension by Q_node and A_node,
For realizing the scheduling method of 5SP；
Second of combination intermediate node B_node_ext is combined into mode of extension by Q_node and B_node, is used for
Realize the scheduling method of WFQ+1SP；
The outlet of above-mentioned each node is all there are two traffic channel, a committed information rate CIR traffic channel and one
Beyond information rate EIR traffic channel.
Based on the above technical solution, described Q_node, A_node, B_node and P_node are basic scheduling section
Point, A_node_ext and B_node_ext are combination intermediate node.
Based on the above technical solution, CIR traffic channel is for carrying CIR flow, and EIR traffic channel is for carrying
EIR flow, and the priority of CIR traffic channel is higher than the priority of EIR traffic channel.
Based on the above technical solution, each node configures two traffic shapers, and one for exporting CIR stream
Amount, another is for exporting EIR flow.
The present invention also provides a kind of scheduling model of priority scheduling, including QoS scheduling model and HQoS scheduling model,
QoS scheduling model, including 8 Q_node and P_node, the CIR traffic channel of all Q_node are connected to P_node's
The EIR traffic channel of SP0, all Q_node are sequentially connected on the SP1-SP8 of P_node；HQoS scheduling model, including 8 Q_
Node, a P_node and at least one intergrade node, intergrade node is by A_node_ext, B_node_ext and an A_
Node combination, A_node_ext and B_node_ext are connected respectively to the SP2 and SP3 of A_node, and 8 Q_node are by preferential
Grade is arranged as Q0-Q7 from high to low；8 Q_node and first intergrade node connections, the CIR traffic channel of Q0-Q7 connect
It is connected to the SP0 of A_node, the EIR traffic channel of Q0 is connected to the SP1 of A_node, and the EIR traffic channel of Q1-Q5 is connected respectively to
The EIR traffic channel of the SP0-SP4 of A_node_ext, Q6-Q7 are connected respectively to the SP0 and SP1 of B_node_ext；Work as intergrade
When node has one, the SP0 of the CIR traffic channel connection P_node of intergrade node, EIR traffic channel is connected to P_node's
SP9；When intergrade node is greater than one, the CIR traffic channel of previous intergrade node connects the latter intergrade node
The SP0 of A_node, the EIR traffic channel of previous intergrade node connect the SP0 of the latter intergrade node B_node_ext,
And the SP0 of the CIR traffic channel connection P_node of the last one intergrade node, EIR traffic channel are connected to P_node's
SP9。
Based on the above technical solution, the P_node of the P_node and HQoS scheduling model of the QoS scheduling model
It is same.
The present invention also provides a kind of dispatching methods of priority scheduling, include the following steps:
S1. business enters scheduling unit, according to pre-set priority and scheduling attributes information, distributes to corresponding Q_
node；
S2. the priority and weight properties of Q_node, is looked for where business is subsidiary by searching for the connection relationship of the Q_node
To next stage node；
S3. next stage node type is searched, if P_node, into S6；If intergrade node, into S4；
S4. business enters intergrade node, is scheduled according to HQoS scheduling model, and business incidentally goes up the intergrade node
Priority weighting attribute, then by searching for the connection relationship of the intergrade node, find next stage node；
S5. the type for searching next stage node at this time, if P_node, into S6；If intergrade node, into S4；
S6. business enters P_node, is scheduled according to QoS scheduling model, and the flow after final scheduling leaves P_node.
Based on the above technical solution, the business is by way of specifying or being mapped based on vlan_pri, in advance
Priority is first set；Scheduling attributes are divided into QoS or HQoS, and the connection relationship of node is preset.
Based on the above technical solution, the Q_node determines each traffic channel according to the CIR and EIR of configuration
Flow, and business is sent to next stage node.
Based on the above technical solution, the intergrade node according to configuration CIR and EIR and enters each of direction
The priority and weight of item stream are scheduled.
The beneficial effects of the present invention are:
1, different types of scheduling unit modularization realizes queue, middle layer and end by forming different scheduling models
The priority scheduling of mouth stratification is conducive to the distribution and recycling of dispatching resource.
2, the different priorities scheduling model based on port can be arbitrarily designated queue to different priorities, realize flexible
Mapping and scheduling feature, realize different scenes business demand flexible configuration.
3, scheduling unit modularization exists, and applicability is relatively good, and extent for multiplexing is high, is conducive to the further expansion of the function
Exhibition.
Detailed description of the invention
Fig. 1 is queue nodes schematic diagram in the basic scheduling unit of the present invention；
Fig. 2 is the intermediate node schematic diagram of 4SP scheduling method in the basic scheduling unit of the present invention；
Fig. 3 is the intermediate node schematic diagram of WFQ scheduling method in the basic scheduling unit of the present invention；
Fig. 4 is the basic scheduling unit middle port scheduling node schematic diagram of the present invention；
Fig. 5 is the first combination intermediate node schematic diagram in the basic scheduling unit of the present invention；
Fig. 6 is second of combination intermediate node schematic diagram in the basic scheduling unit of the present invention；
Fig. 7 is QoS scheduling model schematic diagram of the present invention；
Fig. 8 is HQoS scheduling model schematic diagram of the present invention；
Fig. 9 is QoS+HQoS scheduling model schematic diagram of the present invention；
Figure 10 is the implementation method flow chart of priority scheduling of the embodiment of the present invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
For convenience of explanation, each node passes through following shorthand letter respectively and describes:
Queue nodes: Q_node；
The intermediate node of 4SP scheduling method: A_node；
The intermediate node of WFQ scheduling method: B_node；
Port node: P_node；
The first combination intermediate node: A_node_ext；
Second of combination intermediate node: B_node_ext.
The scheduling unit of priority scheduling of the present invention, including a variety of basic scheduling nodes and two kinds of combination intermediate nodes.
Basic scheduling node is divided into: queue nodes Q_node, 4SP (4Strict Priority, 4 grades of strict priorities) are adjusted
The middle node of intermediate node A_node, WFQ (WeightedFairQueuing, weighted fair are lined up) scheduling method of degree mode
Point B_node and port node P_node.
Combination intermediate node is divided into: the first combination intermediate node A_node_ext and second of combination intermediate node B_
node_ext。
As shown in Figure 1, Q_node has a highest priority SP0, it is used for queue scheduling, only supports polling dispatching.
As shown in Fig. 2, A_node is dispatched for intergrade, it is scheduled according to priority, A_node has 4 priority,
It is from high to low SP0 to SP3.
As shown in Figure 3.B_node is equally used for intergrade scheduling, carries out graded dispatching according to weight, has a highest excellent
First grade SP0.
As shown in figure 4, P_node is used for Port Scheduling, including 11 priority, it is from high to low SP0 to SP10, wherein
SP9 support WFQ scheduling method, SP10 be it is reserved, convenient for later extension.
As shown in figure 5, A_node_ext is combined into mode of extension by Q_node and A_node, realize 5SP's
Scheduling method.
As shown in fig. 6, B_node_ext is combined into mode of extension by Q_node and B_node, WFQ+ is realized
The scheduling method of 1SP.
The basic scheduling node and combination intermediate node configure two traffic shapers (shaper), for exporting two
Item stream respectively corresponds CIR (Commit Information Rate, committed information rate) and EIR (Excess
Information Rate exceeds information rate) function, it may be connected in any priority of next stage node, to realize
The priority scheduling flexibly switched.All there are two traffic channels, respectively CIR traffic channel and EIR for the outlet of above-mentioned each node
Traffic channel, CIR traffic channel are used to carry node EIR flow for carrying node CIR flow, EIR traffic channel, and
The priority of CIR traffic channel is higher than the priority of EIR traffic channel.
The scheduling model of priority scheduling of the present invention, based on the node in above-mentioned scheduling unit, including QoS scheduling model and
HQoS scheduling model.
As shown in fig. 7, QoS scheduling model includes 8 Q_node and P_node, 8 Q_node are according to priority by height
It is arranged as Q0-Q7 to low, P_node is expressed as SP0-SP10 according to priority from high to low, and wherein SP1-SP8 is business side 8
The mapping of priority CS7-BE, P9 are used for the connection under WFQ mode, SP10 be it is reserved use, some scenes can be by BE (Best
Effort, best effort) service priority mapping by SP8 is changed to SP10.The CIR traffic channel of all Q_node (Q0-Q7) is equal
It is connected to the SP0 of P_node, the EIR traffic channel of all Q_node is sequentially connected on the SP1-SP8 of P_node, to distinguish not
With the priority of business.
HQoS scheduling model includes 8 Q_node, a P_node and at least one intergrade node.As shown in figure 8, being
One kind of HQoS scheduling model, intergrade PW_LEVEL and LSP_LEVEL can regard an intergrade node as respectively.Intergrade
Node is combined by A_node_ext, B_node_ext and an A_node, and A_node_ext and B_node_ext are connected respectively to
The SP2 and SP3 of A_node, 8 Q_node are according to priority arranged as Q0-Q7 from high to low.Such as the PW_LEVEL in Fig. 8,8 Q_
Node and first intergrade node connection, the CIR traffic channel of Q0-Q7 are all connected to the SP0 of A_node, the EIR flow of Q0
Channel is connected to the SP1 of A_node, and the EIR traffic channel of Q1-Q5 is connected respectively to the SP0-SP4 of A_node_ext, Q6-Q7's
EIR traffic channel is connected respectively to the SP0 (WFQ) and SP0 of B_node_ext.
When intergrade node has one, the SP0 of the CIR traffic channel connection P_node of intergrade node, EIR flow leads to
Road is connected to the SP9 of P_node.
When intergrade node is greater than one, the CIR traffic channel of previous intergrade node connects the latter intergrade
The SP0 of node A_node, the EIR traffic channel of previous intergrade node connect the latter intergrade node B_node_ext's
SP0 (WFQ), and the SP0 of the CIR traffic channel connection P_node of the last one intergrade node, EIR traffic channel are connected to P_
The SP9 of node；Multiple intergrade nodes can improve resource utilization with extended model.As shown in Figure 8, intergrade PW_
LEVEL and LSP_LEVEL is considered as an intergrade node respectively, and the latter intergrade node connects P_node.
In HQoS scheduling model, the EIR traffic channel of A_node is connected to the SP9 of P_node, shows to be connected to this excellent
The queue of first grade can configure weight, and make WFQ scheduling according to weight, and the queue of final all WFQ scheduling is again with the preferential of SP9
Grade carries out SP scheduling with other priority queries, and the SP+WFQ scheduling of different priorities may be implemented on P_node in this way.
As shown in figure 9, when the P_node of the P_node and HQoS scheduling model of QoS scheduling model is same, it can be with
Achieve the effect that QoS+HQoS mixed scheduling.Since each PTN device port can allocate 16 Q_node in advance, respectively correspond
The Q0-Q7 of Q0-Q7 and the HQoS scheduling of QoS scheduling, the Q0-Q7 of QoS is connected respectively to the different priority of P_node, and HQoS
LSP node CIR traffic channel be connected to SP0, EIR traffic channel is all connected to SP9 (WFQ) and configures different WFQ weights,
It is scheduled together with QoS queue.
Since each PTN device port allocates 8 QoS queue node Q_node and 8 HQoS queue nodes Q_ in advance
node.Therefore QoS scheduling model and HQoS scheduling model can configure simultaneously in a port, reach QoS+HQoS mixed scheduling
Effect.We are 16 Q_node of the port assignment, respectively correspond the Q0-Q7 of Q0-Q7 and the HQoS scheduling of QoS scheduling,
The Q0-Q7 of QoS is connected respectively to the different priority of P_node, and the CIR flow of the LSP_LEVEL intergrade node of HQoS is logical
Road is connected to SP0, and EIR traffic channel is all connected to SP9, and configures different WFQ weights, is scheduled together with QoS queue.
As shown in Figure 10, the dispatching method of priority scheduling of the present invention is based on above-mentioned scheduling model, specifically includes following step
It is rapid:
S1. it is specified or based on mappings such as vlan_pri by way of preset the priority of business, setting needs
Scheduling attributes (QoS either HQoS), the connection relationship of each node is also preset according to different scheduling attributes.Business enters
Scheduling unit distributes to corresponding Q_node according to pre-set information.Usually each device port allocates 8 in advance
Q_node and 8 for QoS is used for the Q_node of HQoS.
S2.Q_node determines the flow of each traffic channel, the subsidiary place Q_node of business according to the CIR and EIR of configuration
Priority and weight properties, find next stage node by searching for the connection relationship of the Q_node.
S3. next stage node type is searched, if P_node, into S6；If intergrade node, into S4；
S4. business enters intergrade node, is scheduled according to HQoS scheduling model.Specifically, intergrade node according to
Configuration CIR and EIR and enter direction each item stream priority and weight be scheduled；Business incidentally goes up the intergrade node
Priority weighting attribute, then by searching for the connection relationship of the intergrade node, find next stage node；
S5. the type for searching next stage node at this time, if P_node, into S6；If intergrade node, into S4；
S6. business enters P_node, is scheduled according to QoS scheduling model, specifically, P_node matches according to own bandwidth
It sets, and enters the priority of each item stream in direction and weight is scheduled, the flow after final scheduling leaves port node P_
node。
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (8)
1. a kind of scheduling unit of priority scheduling characterized by comprising
Queue nodes Q_node has a highest priority SP0, is only used for queue polling dispatching；
The intermediate node A_node of 4 grades of strict priority 4SP scheduling methods, the priority SP0 to SP3 including 4 from high to low,
It dispatches for intergrade, is scheduled according to priority；
The intermediate node B_node of WFQ scheduling method has a highest priority SP0, for intergrade dispatch, according to weight into
Row graded dispatching；
Port node P_node, the priority SP0 to SP10 including 11 from high to low, wherein SP9 supports WFQ scheduling method,
SP10 is reserved；
The first combination intermediate node A_node_ext, is combined into mode of extension by Q_node and A_node, is used for
Realize the scheduling method of 5 grades of strict priority 5SP；
Second of combination intermediate node B_node_ext is combined into mode of extension by Q_node and B_node, for realizing
The scheduling method of WFQ+1 grades of strict priority 1SP；
All there are two traffic channel, a committed information rate CIR traffic channel and one exceed for the outlet of above-mentioned each node
Information rate EIR traffic channel.
2. the scheduling unit of priority scheduling as described in claim 1, it is characterised in that: described Q_node, A_node, B_
Node and P_node is basic scheduling node, and A_node_ext and B_node_ext are combination intermediate node.
3. the scheduling unit of priority scheduling as described in claim 1, it is characterised in that: CIR traffic channel is for carrying CIR
Flow, EIR traffic channel is for carrying EIR flow, and the priority of CIR traffic channel is higher than the priority of EIR traffic channel.
4. the scheduling unit of priority scheduling as described in claim 1, it is characterised in that: it is whole that each node configures two flows
Shape device, one is used to export CIR flow, another is for exporting EIR flow.
5. a kind of dispatching method of priority scheduling, which comprises the steps of:
S1. business enters scheduling unit, according to pre-set priority and scheduling attributes information, distributes to corresponding queue section
Point Q_node；
The queue nodes Q_node has a highest priority SP0, is only used for queue polling dispatching；
S2. the priority and weight properties of Q_node, finds down where business is subsidiary by searching for the connection relationship of the Q_node
First nodes；
S3. next stage node type is searched, if port node P_node, the port node P_node, including 11 by height
To low priority SP0 to SP10, wherein SP9 supports WFQ scheduling method, SP10 be it is reserved, then into S6；If intergrade section
Point, into S4；
S4. business enters intergrade node, is scheduled according to HQoS scheduling model, and business incidentally goes up the excellent of the intergrade node
First grade weight properties, then by searching for the connection relationship of the intergrade node, find next stage node；
The HQoS scheduling model, including 8 Q_node, a P_node and at least one intergrade node, intergrade node
It is combined by A_node_ext, B_node_ext and an A_node, A_node_ext and B_node_ext are connected respectively to A_
The SP2 and SP3 of node, 8 Q_node are according to priority arranged as Q0-Q7 from high to low；8 Q_node and first centres
Grade node connection, the CIR traffic channel of Q0-Q7 are all connected to the SP0 of A_node, and the EIR traffic channel of Q0 is connected to A_node
SP1, the EIR traffic channel of Q1-Q5 is connected respectively to the SP0-SP4 of A_node_ext, the EIR traffic channel difference of Q6-Q7
It is connected to the SP0 and SP1 of B_node_ext；When intergrade node has one, the CIR traffic channel of intergrade node connects P_
The SP0 of node, EIR traffic channel are connected to the SP9 of P_node；
When intergrade node is greater than one, the CIR traffic channel of previous intergrade node connects the latter intergrade node
The SP0 of A_node, the EIR traffic channel of previous intergrade node connect the SP0 of the latter intergrade node B_node_ext,
And the SP0 of the CIR traffic channel connection P_node of the last one intergrade node, EIR traffic channel are connected to P_node's
SP9；
S5. the type for searching next stage node at this time, if P_node, into S6；If intergrade node, into S4；
S6. business enters P_node, is scheduled according to QoS scheduling model, and the flow after final scheduling leaves P_node；
The QoS scheduling model, including 8 Q_node and P_node, the CIR traffic channel of all Q_node are connected to
The EIR traffic channel of the SP0 of P_node, all Q_node are sequentially connected on the SP1-SP8 of P_node.
6. dispatching method as claimed in claim 5, it is characterised in that: the business is by specifying or being based on virtual LAN
The mode of priority vlan_pri mapping, presets priority；Scheduling attributes are divided into QoS or HQoS, the connection relationship of node
It presets.
7. dispatching method as claimed in claim 5, it is characterised in that: the Q_node determines every according to the CIR and EIR of configuration
The flow of a traffic channel, and business is sent to next stage node.
8. dispatching method as claimed in claim 5, it is characterised in that: the intergrade node according to configuration CIR and EIR, with
And enter the priority of each item stream in direction and weight is scheduled.
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