CN105263168A - Cache management method specially for seamless switching of heterogeneous wireless network of intelligent distribution network - Google Patents
Cache management method specially for seamless switching of heterogeneous wireless network of intelligent distribution network Download PDFInfo
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- CN105263168A CN105263168A CN201510718087.0A CN201510718087A CN105263168A CN 105263168 A CN105263168 A CN 105263168A CN 201510718087 A CN201510718087 A CN 201510718087A CN 105263168 A CN105263168 A CN 105263168A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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Abstract
The present invention relates to a cache management method specially for seamless switching of a heterogeneous wireless network of an intelligent distribution network. The cache management method comprises the steps of: dividing services into protective type services, control type services, information monitoring type services and video type services according to functional attributes of services of an intelligent distribution network; marking the protective type services and the control type services as services of level 1, and marking the information monitoring type services and the video type services as services of level 2 according to requirements of the services of the intelligent distribution network on transmission delay and reliability; immediately applying for a section of cache space when detecting that a current connection is disconnected; analyzing the type of newly incoming data services of the distribution network, successively storing the services into a cache output queue according to the sequence that the services of level 1 are located at the front side and the services of level 2 are located at the back side; and preferentially discarding the services of level 2 to make space for storing the newly incoming services of level 1 if the applied cache space is fully occupied and a new connection has not been established successfully. The cache management method can ensure that the protective type services and the control type services are transmitted as soon as possible without being lost, thereby achieving cache management of seamless switching of the heterogeneous wireless network of the intelligent distribution network, and improving service quality of transmission of the distribution network services.
Description
Technical field
The invention belongs to intelligent distribution network technical field, relate to a kind of buffer memory management method of the heterogeneous wireless network seamless switching towards intelligent distribution network.
Background technology
In the heterogeneous wireless network of intelligent distribution network, when network state or network demand change, in order to better meet the service quality (QoS) of distribution business transmission, need to be switched to more suitably communication.In handoff procedure, the disconnection of link is inevitable, and this just needs cache management mechanism reasonable in design to ensure the seamless switching of communication.
Existing cache management mechanism can be divided into two classes, 1) Queue Management Algorithm (PQM) of passive type; 2) active Queue Management Algorithm (AQM).Wherein, Passive Management algorithm mainly comprises that stem abandons, tail drop and random drop etc.; Active Management algorithm mainly comprises random early check grouping and abandons (RED) and the improvement on RED algorithm.Above buffer queue administrative mechanism improves the performance of buffer queue management to a certain extent, but does not carry out differentiation management for type of service and to the difference of QoS demand, and the intelligent distribution network being applied to the many demands of multi-service will have some limitations.At present, a kind of cache management mechanism of the heterogeneous wireless network seamless switching for intelligent distribution network different business demand is not yet had.
Summary of the invention
In view of this; the object of the present invention is to provide a kind of buffer memory management method of the heterogeneous wireless network seamless switching towards intelligent distribution network; when wireless network needs to switch; the method can need the data service transmitted in valid cache disconnecting process; ensure that protection class business and control class business can send as early as possible and try one's best not lose; realize the cache management of intelligent distribution network heterogeneous wireless seamless switching, improve the service quality of power distribution network business transmission.
For achieving the above object, the invention provides following technical scheme:
Towards a buffer memory management method for the heterogeneous wireless network seamless switching of intelligent distribution network, comprise the following steps:
S1: according to the functional attributes of intelligent power distribution network service, is divided into protection class business, controls class business, information monitoring class business, video class business by business;
S2: according to the requirement of intelligent power distribution network service to propagation delay time and reliability, mark protection class business and to control class business be grade 1, information monitoring class business and video class business are grade 2;
S3: when multi-mode communication module detects that current connection disconnects, apply now one section of spatial cache;
S4: resolve the new power distribution network data traffic types arrived, according to the business of grade 1 front, the posterior order of business of grade 2, successively stored in buffer memory output queue;
S5: if the spatial cache of application is occupied full, and newly connects and be not also successfully established, then preferentially abandon the business of grade 2, slot milling deposits the business of the new grade 1 arrived.
Further, in step sl, described protection class business comprises the network protection of vertical connection; Described control class business comprises that power distribution automation three is distant, distributed busbar protection control and management; Described information monitoring class business comprises that power distribution automation two is distant, equipment running status monitoring; Described video class business comprises distribution transforming video monitoring.
Further, in step s 2, the propagation delay time of protection class business and control class business need is all Millisecond, and reliability requirement is all high, so mark is protected class business and controlled class business is grade 1; The propagation delay time of information monitoring class business and video class business need is all level second, and reliability requirement is all higher, so label information monitoring class business and video class business are grade 2; In step s 4 which, resolve the new power distribution network data traffic types arrived, according to the business of grade 1 front, the posterior order of business of grade 2, successively stored in buffer memory output queue, ensure after new connection establishment, the business prioritised transmission of grade 1 is gone out, thus reduction propagation delay time, with the low time delay requirement of the business of satisfy hierarchy 1.
Further, step S5 specifically comprises:
S51: when spatial cache is full, the business of grade 2 occupies partial buffering space, and next have the business of grade 1 to arrive, then abandon the packet of the business stem of buffer memory output queue middle grade 2, the business of the grade 1 newly arrived is stored in the afterbody of the business of buffer memory output queue middle grade 1;
S52: when spatial cache is full, the business of grade 2 occupies partial buffering space, and next have the business of grade 2 to arrive, then abandon the packet of the business stem stored in buffer memory output queue middle grade 2, the business of remaining grade 2 moves forward a unit, and the business of the grade 2 newly arrived is stored in the afterbody of the business of buffer memory output queue middle grade 2;
S53: when spatial cache is full, the business of only remaining grade 1 in buffer memory output queue, and next have the business of grade 1 to arrive, then abandon the packet of the business stem of buffer memory output queue middle grade 1, the business of remaining all grades 1 moves forward a unit, and the business of the grade 1 newly arrived is stored in buffer memory output queue afterbody;
S54: when spatial cache is full, the business of only remaining grade 1 in buffer memory output queue, and next have the business of grade 2 to arrive, then directly abandon the business of the new grade 2 arrived.
Beneficial effect of the present invention is: compared with prior art; first this method needs the functional attributes according to intelligent power distribution network service; business is divided into protection class business, controls class business, information monitoring class business, video class business; and according to the requirement of intelligent power distribution network service to propagation delay time and reliability; mark protection class business and control class business are grade 1, and information monitoring class business and video class business are grade 2.When multi-mode communication module detects that current connection disconnects, apply now one section of spatial cache, resolve the new power distribution network data traffic types arrived simultaneously, according to the business of grade 1 front, the posterior order of business of grade 2, successively stored in buffer memory output queue.If the spatial cache of application is occupied full, and newly connects and be not also successfully established, then preferentially abandon the business of grade 2, slot milling deposits the business of the new grade 1 arrived.This cache management mechanism mainly gives intelligent distribution network delineation of activities grade; and abandon corresponding packet when needs according to grade classification; thus ensure that protecting class business and control class business can send as early as possible and try one's best does not lose; realize the cache management of intelligent distribution network heterogeneous wireless seamless switching, improve the service quality of power distribution network business transmission.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is the schematic flow sheet of the method for the invention;
Fig. 2 is for the power distribution network business described in step S4 is stored in output queue precedence diagram;
Fig. 3 for the power distribution network business described in step S51 stored in abandon flow chart;
Fig. 4 for the power distribution network business described in step S52 stored in abandon flow chart;
Fig. 5 for the power distribution network business described in step S53 stored in abandon flow chart;
Fig. 6 for the power distribution network business described in step S54 stored in abandon flow chart.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Fig. 1 is the schematic flow sheet of the method for the invention, and as shown in the figure, the method for the invention comprises the following steps:
S1: according to the functional attributes of intelligent power distribution network service, is divided into protection class business, controls class business, information monitoring class business, video class business by business;
S2: according to the requirement of intelligent power distribution network service to propagation delay time and reliability, mark protection class business and to control class business be grade 1, information monitoring class business and video class business are grade 2;
S3: when multi-mode communication module detects that current connection disconnects, apply now one section of spatial cache;
S4: resolve the new power distribution network data traffic types arrived, according to the business of grade 1 front, the posterior order of business of grade 2, successively stored in buffer memory output queue; Fig. 2 is for the power distribution network business described in step S4 is stored in output queue precedence diagram;
S5: if the spatial cache of application is occupied full, and newly connects and be not also successfully established, then preferentially abandon the business of grade 2, slot milling deposits the business of the new grade 1 arrived.
See Fig. 3 to Fig. 6, the concrete steps of step S5 are:
Step S51: as shown in Figure 3, when spatial cache is full, the business of grade 2 occupies partial buffering space, and next have the business of grade 1 to arrive, then abandon the packet of the business stem of buffer memory output queue middle grade 2, the business of the grade 1 newly arrived is stored in the afterbody of the business of buffer memory output queue middle grade 1;
Step S52: as shown in Figure 4, when spatial cache is full, the business of grade 2 occupies partial buffering space, and next have the business of grade 2 to arrive, then abandon the packet of the business stem stored in buffer memory output queue middle grade 2, the business of remaining grade 2 moves forward a unit, and the business of the grade 2 newly arrived is stored in the afterbody of the business of buffer memory output queue middle grade 2;
Step S53: as shown in Figure 5, when spatial cache is full, the business of only remaining grade 1 in buffer memory output queue, and next have the business of grade 1 to arrive, then abandon the packet of the business stem of buffer memory output queue middle grade 1, the business of remaining all grades 1 moves forward a unit, and the business of the grade 1 newly arrived is stored in buffer memory output queue afterbody;
Step S54: as shown in Figure 6, when spatial cache is full, the business of only remaining grade 1 in buffer memory output queue, and next have the business of grade 2 to arrive, then directly abandon the business of the new grade 2 arrived.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (4)
1., towards a buffer memory management method for the heterogeneous wireless network seamless switching of intelligent distribution network, it is characterized in that: comprise the following steps:
S1: according to the functional attributes of intelligent power distribution network service, is divided into protection class business, controls class business, information monitoring class business, video class business by business;
S2: according to the requirement of intelligent power distribution network service to propagation delay time and reliability, mark protection class business and to control class business be grade 1, information monitoring class business and video class business are grade 2;
S3: when multi-mode communication module detects that current connection disconnects, apply now one section of spatial cache;
S4: resolve the new power distribution network data traffic types arrived, according to the business of grade 1 front, the posterior order of business of grade 2, successively stored in buffer memory output queue;
S5: if the spatial cache of application is occupied full, and newly connects and be not also successfully established, then preferentially abandon the business of grade 2, slot milling deposits the business of the new grade 1 arrived.
2. the buffer memory management method of a kind of heterogeneous wireless network seamless switching towards intelligent distribution network according to claim 1, is characterized in that: in step sl, and described protection class business comprises the network protection of vertical connection; Described control class business comprises that power distribution automation three is distant, distributed busbar protection control and management; Described information monitoring class business comprises that power distribution automation two is distant, equipment running status monitoring; Described video class business comprises distribution transforming video monitoring.
3. the buffer memory management method of a kind of heterogeneous wireless network seamless switching towards intelligent distribution network according to claim 1, it is characterized in that: in step s 4 which, resolve the new power distribution network data traffic types arrived, according to the business of grade 1 front, the posterior order of business of grade 2, successively stored in buffer memory output queue, ensure after new connection establishment, the business prioritised transmission of grade 1 is gone out, thus reduces propagation delay time, with the low time delay requirement of the business of satisfy hierarchy 1.
4. the buffer memory management method of a kind of heterogeneous wireless network seamless switching towards intelligent distribution network according to claim 1, is characterized in that: step S5 specifically comprises:
S51: when spatial cache is full, the business of grade 2 occupies partial buffering space, and next have the business of grade 1 to arrive, then abandon the packet of the business stem of buffer memory output queue middle grade 2, the business of the grade 1 newly arrived is stored in the afterbody of the business of buffer memory output queue middle grade 1;
S52: when spatial cache is full, the business of grade 2 occupies partial buffering space, and next have the business of grade 2 to arrive, then abandon the packet of the business stem stored in buffer memory output queue middle grade 2, the business of remaining grade 2 moves forward a unit, and the business of the grade 2 newly arrived is stored in the afterbody of the business of buffer memory output queue middle grade 2;
S53: when spatial cache is full, the business of only remaining grade 1 in buffer memory output queue, and next have the business of grade 1 to arrive, then abandon the packet of the business stem of buffer memory output queue middle grade 1, the business of remaining all grades 1 moves forward a unit, and the business of the grade 1 newly arrived is stored in buffer memory output queue afterbody;
S54: when spatial cache is full, the business of only remaining grade 1 in buffer memory output queue, and next have the business of grade 2 to arrive, then directly abandon the business of the new grade 2 arrived.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070291768A1 (en) * | 2006-06-16 | 2007-12-20 | Harris Corporation | Method and system for content-based differentiation and sequencing as a mechanism of prioritization for QOS |
| CN103200125A (en) * | 2013-03-28 | 2013-07-10 | 广东电网公司电力调度控制中心 | Method and system for avoiding electric power data network node congestion |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070291768A1 (en) * | 2006-06-16 | 2007-12-20 | Harris Corporation | Method and system for content-based differentiation and sequencing as a mechanism of prioritization for QOS |
| CN103200125A (en) * | 2013-03-28 | 2013-07-10 | 广东电网公司电力调度控制中心 | Method and system for avoiding electric power data network node congestion |
Non-Patent Citations (1)
| Title |
|---|
| 陈强: "《基于电力通信网的PTN QoS技术应用研究》", 《中国优秀硕士学位论文全文数据库》 * |
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