CN101917402B - Power dispatching cloud consultation method and device for guaranteeing safety - Google Patents
Power dispatching cloud consultation method and device for guaranteeing safety Download PDFInfo
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Abstract
The invention discloses power dispatching cloud consultation method and device for guaranteeing safety by comprehensively applying the technologies of video consultation with could compute, cloud consultation, safety, non obstructive and high definition, wireless communication network and the like. The invention realizes the non obstructive of power dispatching message flow events by a stochastic service queuing theory mathematical method and 6-class priority queue rules, the safety restraint by integrating physical protection, logic protection and safety management measures, and high definition video flow and slide show images displaying 1080p (20CIF) through a high-speed communication network., so as to achieve the resource sharing of cloud end equipment such as a projector and various display screens, and complete a power dispatching dynamic cloud consultation system for guaranteeing safety. The invention serves intelligent power grids and promotes the development of intelligent dispatching panorama visualization.
Description
Technical field
The invention belongs to power domain, serve intelligent grid, be specifically related to the intelligent field of power scheduling, comprehensive cloud computing, cloud are held a conference or consultation, fail safe, non-blocking, high sharpness video is held a conference or consultation and cordless communication network technology, has proposed a kind of power dispatching cloud consultation method guaranteeing safety and device.
Background technology
Cloud computing is a hotter new term, and resource pool is called " cloud ", and the scale of cloud can dynamic retractility, and its border is fuzzy; Cloud is fluid aloft, cannot be also without determining its particular location, but it is present in somewhere really." cloud " is that some can self and the virtual computational resource of management, is generally some large server clusters, comprises calculation server, storage server, broadband resource etc.Cloud computing puts together all computational resources, and realizes management automatically by software, without artificial participation.Cloud computing (Cloud Computing) is the development of parallel computation (Parallel Computing), Distributed Calculation (Distributed Computing) and grid computing (Grid Computing), or perhaps the business of these computer science concepts realizes.Cloud computing is that virtual (Virtualization), effectiveness are calculated the result that the concepts such as (Utility Computing), IaaS (infrastructure serve), PaaS (platform serves), SaaS (software serve) are mixed evolution and risen to.Current popular typical cloud computing solution comprises Google cloud computing, Amazon cloud computing, Salesforce cloud computing, Yunan County's congruence.
Based on using a model of Self-Service, provide the ability of uploading as required, build, dispose, dispatch, managing and reporting business service for user.Meanwhile, the Self-Service providing to user is more, and necessary operation management activity is just fewer.Theory based on this kind of cloud computing, holds a conference or consultation in panorama visible process in power scheduling, and demonstration is represented to " cloud " and change, and Bindery security constraint, the present invention proposes a kind of power dispatching cloud consultation method guaranteeing safety and device.Building intelligent grid is the common choice that Challenges for Future is responded actively in International Power industry, and power scheduling is the important step of intelligent grid.In the intelligentized process of power scheduling, the panorama visible that power scheduling is held a conference or consultation requires more and more higher.The object of the invention is to realize the demonstration that power scheduling holds a conference or consultation and change with representing " cloud ", realize and showing and the resource-sharing representing, and ensure its fail safe.
Although current power scheduling consultation system has voice consultation system, the video council quotient system various ways such as net true consultation system etc. of unifying, and has following 6 deficiencies.One, must could realize voice, video or net in the chamber of specifically holding a conference or consultation and really hold a conference or consultation; Its two, the demonstration of holding a conference or consultation, with to represent equipment idle or earn and rob use simultaneously, realize the demand showing with representing resource-sharing outstanding; Its three, if spokesman need to represent the information in notebook personal computer, plug projecting apparatus line/display screen line bothers very much, and Signal plug/seat and the cable easy break-down thereof of computer, projecting apparatus/display screen, the impact process of holding a conference or consultation; Its four, cannot under the prerequisite guaranteeing safety, mix the wired and wireless technology of holding a conference or consultation of using; Its five, cannot realize spokesman's self-help model, and more cannot realize spokesman's self-help model have successively personnel to add in the situation that in process is held a conference or consultation in power scheduling; Its six, cannot realize and in process is held a conference or consultation in power scheduling, take into account 2 kinds of patterns simultaneously, be i.e. spokesman's self-help model and host's pattern.Method and apparatus of the present invention can overcome above 6 deficiencies, and one has device, projecting apparatus/display screen and the computer of invention, does not impose the well-equipped chamber of holding a conference or consultation, and at common meeting room, can realize the power dispatching cloud consultation guaranteeing safety; Its two, reach the resource-sharing of the high in the clouds equipment being formed by projecting apparatus and all kinds of display screens etc.; Its three, power dispatching cloud consultation stream is connected with spokesman's computer with lan line by wireless or/and cable LAN; Its four, power dispatching cloud consultation stream can pass through WLAN (wireless local area network) or cable LAN, also the hybrid network to consist of WLAN (wireless local area network) and cable LAN realizes power dispatching cloud consultation under the prerequisite guaranteeing safety; Its five, can realize spokesman's self-help model, and also can realize spokesman's self-help model have successively personnel to add in the situation that in process is held a conference or consultation in power scheduling; Its six, can realize and in process is held a conference or consultation in power scheduling, take into account 2 kinds of patterns simultaneously, be i.e. spokesman's self-help model and host's pattern.
Summary of the invention
The present invention, by means of the theory of cloud computing, serves intelligent grid, promotes the development of intelligent scheduling panorama visible, and the resource-sharing that realizes demonstration and represent of take is target.The present invention proposes the hold a conference or consultation concept of (Cloud Dynamic Consultation) of cloud, integrated application cloud computing, cloud are held a conference or consultation, fail safe, non-blocking, high sharpness video is held a conference or consultation and the technology such as cordless communication network, has submitted a kind of power dispatching cloud consultation method guaranteeing safety and device to.And provided the specific embodiment of the present invention example---the power scheduling dynamic cloud consultation system guaranteeing safety.
The present invention realizes the non-blocking of power scheduling message flow event by Random Service queueing theory mathematical method, by integrated cryptographic protocol and authentication protocol, realize security constraint, by high-speed communicating network, realize high sharpness video stream and the magic lantern image that shows 720p (9CIF) and 1080p (20CIF).Reach the resource-sharing of the high in the clouds equipment being formed by projecting apparatus and all kinds of display screens etc., complete and construct the power scheduling dynamic cloud consultation system guaranteeing safety.Serve intelligent grid, promote the development of intelligent scheduling panorama visible.
A kind of power dispatching cloud consultation method guaranteeing safety that the present invention proposes, is characterized in that comprising the following steps:
(1) guarantee safety
S2.1 physical protection: user safety authentication card, the control of wireless device transmitting power, directed beam antenna, build protection isolation boundary with many wireless device co-channel interference devices;
S2.2 logic protection: the authentication associated with MAC Address of IP address, encryption, digital signature;
S2.3 Safety Management Measures: supervision, control, calamity are standby, emergency services;
(2) clog-free
S3.1 personnel participating in the meeting's registration: participate in personnel's registration of power dispatching cloud consultation, comprise name, unit, department, post, IP address, MAC Address, submission subject under discussion and content;
Whether S3.2 has host, if enter spokesman's self-help model without S3.3, if there is S3.10 enter host's pattern of holding a conference or consultation;
S3.3 spokesman self-help model;
Whether S3.4 has host's mode request, if without S3.5, if there is S3.10 enter host's pattern of holding a conference or consultation;
S3.5 priority rule is chosen;
Whether S3.6 has priority rule conversion, if without S3.7, if there is S3.5;
S3.7 determines spokesman and order thereof according to priority rule;
S3.8 spokesman uses cloud to hold a conference or consultation, and sends high definition video conferencing stream, above delivers to and shows high in the clouds;
Whether S3.9 is complete or have people to require to interrupt, if without S3.7, if there is S3.4;
The S3.10 host pattern of holding a conference or consultation;
Whether S3.11 host declares the closing of, and S3.12 if not, if finish;
Whether S3.12 host specifies use, and S3.13 if not, if S3.15;
S3.13 spokesman application;
S3.14 host is confirmed whether approval, and S3.13 if not, if S3.15;
S3.15 spokesman uses cloud to hold a conference or consultation, and sends high definition video conferencing stream, above delivers to and shows high in the clouds;
Whether S3.16 is complete or have people to require to interrupt, if without S3.15, if there is S3.11;
(3) aobvious high definition
Correspondence is held a conference or consultation and is shown the high definition video conferencing stream of every road 720p to improve quality, and comprises following 2 steps:
Construct IP network: the full-duplex bandwidth wired and/or network that wireless transfer channel forms is not less than 33Mbps; Show that high definition comprises the high definition video conferencing of presentation device support 720p to improve quality of holding a conference or consultation of projecting apparatus and display screen; Wherein, step S3.5 priority rule comprises following 6 classes:
One, according to submission subject under discussion and the content of personnel participating in the meeting's registration, importance is descending, determines priority query;
Its two, according to the application time order of personnel participating in the meeting registration, { Xi} has Markov character, determines priority query to utilize queueing theory discrete time stochastic process;
Its three, according to the unit sequence of personnel participating in the meeting registration, determine priority query;
Its four, according to department's specialty sequence of personnel participating in the meeting registration, determine priority query;
Its five, according to post and the name sequence of personnel participating in the meeting registration, post is descending, with post, according to name lexicographic order, determines priority query;
They are six years old, in power dispatching cloud consultation process, there are successively personnel to add while holding a conference or consultation, application Random Service queueing theory mathematical method determines that priority query's rule is: after emergency event, to first service (LCFS), be M/M/c/LCFS model, important issue and content band Priority Service power (PR) are M/M/c/PR model, inferior important issue and content Random Service (SIRO) are M/M/c/SIRO model, and in remaining general subject under discussion and properties collection, adopting First Come First Served (FCFS) is M/M/c/PR model;
Wherein, described (2) are clog-free is the Random Service feature of holding a conference or consultation according to the intelligentized cloud of power scheduling, utilizes queueing theory mathematical method, sets up Mathematical Modeling, comprising:
If total c the cloud magic lantern of holding a conference or consultation, the average service rate of the cloud magic lantern that each need to be held a conference or consultation is u, and under normal circumstances, the average arrival rate of power scheduling message flow event is λ, and the probability that Δ t has a power scheduling message flow event to arrive in the time is P
1=λ Δ t, the probability that has a power scheduling message flow event exit within the Δ t time is q
1=λ Δ t;
Three kinds of situations below minute:
(4) when unregulated power scheduling message stream event, the probability of three kinds of mutually exclusive events is respectively:
(a) in time t, there is no power scheduling message flow event queuing, the probability that Δ t does not have power scheduling message flow event to arrive constantly is yet P
0(1-λ Δ t);
(b) in time t, there is a power scheduling message flow event, in Δ t, do not have power scheduling message flow event to arrive, but the probability that has a power scheduling message flow event to accept to leave away after cloud is held a conference or consultation is P
1(1-λ Δ t) u Δ t;
(c) in time t, there is no power scheduling message flow event queuing, but at Δ t, constantly, have a power scheduling message flow event to arrive, the probability that also has a power scheduling message flow event to accept to leave away after cloud is held a conference or consultation is P
0λ Δ tu Δ t;
P
0=P
0(1-λ Δ t)+P
1(1-λ Δ t) u Δ t+P
0λ u (Δ t)
2
Omit second order in a small amount, arrange to obtain P
1=λ P
0/ u;
(5) when existing n power scheduling message flow event, and during 1≤n < c, can be divided into following four kinds of situations:
(a) in time t, have n-1 power scheduling message flow event queuing up, Δ t has a power scheduling message flow event to arrive constantly, but the probability of being held a conference or consultation by cloud without any power scheduling message flow event is P
n-1λ Δ t (1-nu Δ t);
(b) in time t, have n+1 power scheduling message flow event queuing up, Δ t does not have power scheduling message flow event to arrive constantly, but the probability that has a power scheduling message flow event to accept to leave away after cloud is held a conference or consultation is P
n+1(1-λ Δ t) [(n+1) u Δ t];
(c) in time t, have n power scheduling message flow event queuing up, Δ t does not have power scheduling message flow event to arrive constantly, and the probability of also being held a conference or consultation by cloud without any power scheduling message flow event is P
n(1-λ Δ t) (1-nu Δ t);
(d) in time t, have n power scheduling message flow event queuing up, Δ t has a power scheduling message flow event to arrive constantly, and the probability that also has a power scheduling message flow event to accept to leave away after cloud is held a conference or consultation is P
nλ Δ tnu Δ t;
(6) during power scheduling message flow event number n >=c, similar with situation (2), but corresponding probability is respectively:
(a)P
n-1(λΔt)(1-cμΔt)
(b)P
n+1(1-λΔt)(cμΔt)
(c)P
n(1-λΔt)(1-cμΔt)
(d)P
n(λΔt)cμΔt
By formula above, obtained:
The probability of stability that solves system is:
Only have when λ/c μ < 1, the cloud magic lantern service system that just can make to hold a conference or consultation reaches stable state and can not line up unlimited queue, and the service intensity of the cloud magic lantern system of holding a conference or consultation is
the utilance of the cloud magic lantern system of holding a conference or consultation;
The service rate of the cloud magic lantern system of holding a conference or consultation is:
While having the individual power scheduling message flow event of n (n < c) in system, the service rate of system is n μ; While having c power scheduling message flow event in system, the service rate of system reaches maximum c μ; When the power scheduling message flow event number in system surpasses c, because c information desk all hurried in, all the other power scheduling message flow events must be queued up, and service rate is at this moment still c μ; Can obtain thus,
Power scheduling message flow event queuing length in system is
The mean waiting time of power scheduling message flow event in system is
The average waiting time of power scheduling message flow event in system
Average electric power scheduling message stream event number in system
Wherein, defined parameters is:
L
q: the average queue length in system;
Wq: the mean waiting time of power scheduling message flow event in system, each power scheduling message flow event is wished more short better during this period of time;
W
s: the average waiting time of power scheduling message flow event in system;
L
s: the average electric power scheduling message stream event number in system;
λ: average arrival rate;
μ: average service rate;
C: the number of the cloud magic lantern of holding a conference or consultation in parallel in system;
ρ: service intensity, i.e. average service time in each cloud magic lantern unit interval of holding a conference or consultation;
P
0: the probability of stability of system.
The invention allows for the device that uses said method, its feature comprises following 8 kinds:
One, step guarantees safety and choke free realization realizes in security administration server;
They are two years old, wireless server is supported IEEE 802.11b/g and 100M LAN interface, with the signaling interface being connected with the projecting apparatus/display screen of improving quality with 720p, and built-in soft decoder software H.264, supporting dhcp server functionality, can be client computer distributing IP address automatically;
Its three, the computer of participating in power dispatching cloud consultation is installed the cloud client software of holding a conference or consultation, this software comprises the step of claim 1-2 and soft encoding software H.264;
They are four years old, at cable LAN application scenarios, computer cloud can quotient group converge by common Ethernet switch, through ethernet line, be connected to wireless server, wireless server connects security administration server and the projecting apparatus/display screen of 720p to improve quality, complete the demonstration that power scheduling holds a conference or consultation and change with representing " cloud ", realize and showing and the resource-sharing representing, and ensure its fail safe;
They are five years old, at WLAN (wireless local area network) application scenarios, computer cloud can quotient group pass through its internal or external wireless LAN card, through wireless IEEE 802.11b/g agreement, be connected to wireless server, wireless server connects security administration server and the projecting apparatus/display screen of 720p to improve quality, and completes demonstration that power scheduling holds a conference or consultation and represents " cloud " and change, realize and showing and the resource-sharing representing, and ensure its fail safe;
They are six years old, hybrid network application scenarios at WLAN (wireless local area network) and cable LAN composition, computer cloud meeting quotient group is by wired or wireless LAN card, wired scene converges by common Ethernet switch, be connected to wireless server, wireless server connects security administration server and the projecting apparatus/display screen of 720p to improve quality, and completes demonstration that power scheduling holds a conference or consultation and represents " cloud " and change, realize and showing and the resource-sharing representing, and ensure its fail safe;
Its seven, the computer of participating in power dispatching cloud consultation can be notebook, desktop computer or server cluster;
They are eight years old, with many co-channel interference devices, build protection isolation boundary, specific practice is: make the wireless coverage radius of co-channel interference device be less than the wireless coverage radius of wireless server, in power dispatching cloud consultation meeting-place week out-of-bounds around the border of the wireless coverage radius of 1 co-channel interference device, with many co-channel interference devices, build protection isolation boundary, the spacing of adjacent co-channel interference device is the wireless coverage radius of 1 co-channel interference device.
Accompanying drawing explanation
In order to make content of the present invention by clearer understanding, and be convenient to the description of embodiment, provide accompanying drawing related to the present invention below and be described as follows:
Fig. 1 is the structural representation of device of the present invention;
Fig. 2 is the cloud of the present invention process prescription figure that holds a conference or consultation;
Fig. 3 is the cloud of the present invention process power scheduling message flow probability of happening characteristic pattern of holding a conference or consultation;
Fig. 4 is video resolution classification chart of the present invention;
Fig. 5 is video resolution comparison diagram of the present invention;
Fig. 6 is the structural representation of the device of specific embodiments of the invention one;
Fig. 7 is the structural representation of the device of specific embodiments of the invention two;
Fig. 8 is the structural representation of the device of specific embodiments of the invention three;
Fig. 9 is the structural representation of the device of specific embodiments of the invention four;
Figure 10 is the schematic flow sheet according to clog-free step in method of the present invention;
Figure 11 is the enforcement illustration that many co-channel interference devices of use of the present invention are built protection isolation boundary.
Embodiment
Device implementation figure of the present invention is shown in Fig. 1, is described as follows.
By IEEE 802.11b/g Wireless Telecom Equipment, construct WLAN (wireless local area network), also can construct cable LAN by netting twine or optical cable simultaneously, Centroid with star topology connects demonstration and represents cloud (concrete high in the clouds equipment comprises projecting apparatus and all kinds of display screens etc.), and other nodes connections participate in each Terminal Type (for example notebook, desktop computer, server cluster) that power scheduling dynamic cloud is held a conference or consultation.Meanwhile, the built-in method of the present invention of security administration server, the high definition of managing fail safe, non-blocking and the video flowing of whole power scheduling dynamic cloud consultation system by topological structure Centroid, ensures the resource-sharing of high in the clouds equipment.Wherein, computer can be connected with Centroid by built-in radio communication network interface card or external Wireless Telecom Equipment with server cluster, also can be connected with Centroid by cable LAN, power scheduling message flow event is delivered to the high in the clouds equipment consisting of projecting apparatus and all kinds of display screens etc., carry out dynamic demonstration and represent.
The soluble concrete technical problems of the present invention is exemplified below.
When only having 1 projecting apparatus, meeting room often many people participate in electric power scheduling meeting chamber of commerce view, need in turn the notebook computer of oneself to be connected to projecting apparatus, plug projecting apparatus line bothers very much.By the present invention, can address this problem easily.Fig. 7 is specific embodiments of the invention one.Wireless cloud is held a conference or consultation as follows.On a Daepori talking computer, security administration server software is installed, ethernet line is connected to wireless server.Wireless server connects the projecting apparatus/display screen of 1080p quality, participates in computer that cloud holds a conference or consultation for every the cloud client software of holding a conference or consultation is installed, and be connected with wireless server by its wireless LAN card, completes wireless cloud and holds a conference or consultation.
When only having 1 available display screen and not using in the situation of switching matrix, the power scheduling that many people the participate in meeting of holding a conference or consultation, needs the notebook computer of oneself to be connected to display screen in turn, and plug display screen line bothers very much.By the present invention, can address this problem easily.Fig. 8 is specific embodiments of the invention two.
When only having 1 projecting apparatus, the chamber of holding a conference or consultation possesses cable LAN condition, can realize easily projecting apparatus share by the present invention.Fig. 9 is specific embodiments of the invention three.Wired cloud is held a conference or consultation as follows.On a Daepori talking computer, security administration server software is installed, ethernet line is connected to wireless server.Wireless server connects the projecting apparatus/display screen of 1080p quality, participate in computer that cloud holds a conference or consultation for every the cloud client software of holding a conference or consultation is installed, and converge through common Ethernet switch by its wired lan card, be connected to wireless server, complete wired cloud and hold a conference or consultation.
When only having 1 projecting apparatus, the chamber of holding a conference or consultation possesses cable LAN condition, and part computer can quotient group possess supports IEEE802.11b/g wireless lan function, wired and wirelessly can mix use, can realize easily projecting apparatus shared by the present invention.Figure 10 is specific embodiments of the invention four.Wired and wireless hybrid network cloud is held a conference or consultation as follows.On a Daepori talking computer, security administration server software is installed, ethernet line is connected to wireless server.Wireless server connects the projecting apparatus/display screen of 1080p quality, participates in computer that cloud holds a conference or consultation for every the cloud client software of holding a conference or consultation is installed.Wired mode converges through common Ethernet switch by its wired lan card, is connected to wireless server, completes wired cloud and holds a conference or consultation.Wireless mode is connected with wireless server by its wireless LAN card, completes wireless cloud and holds a conference or consultation.
Above by special embodiment content description the present invention, but those skilled in the art also can recognize the multiple possibility of modification and optional embodiment, for example, by combining and/or change the feature of single embodiment.Therefore, be understandable that these modification and optional embodiment will be considered as included in the present invention, scope of the present invention is enclosed patent claims and coordinate restriction thereof only.
Claims (2)
1. the power dispatching cloud consultation method guaranteeing safety, is characterized in that comprising the following steps:
(1) guarantee safety
S2.1 physical protection: user safety authentication card, the control of wireless device transmitting power, directed beam antenna, build protection isolation boundary with many wireless device co-channel interference devices;
S2.2 logic protection: the authentication associated with MAC Address of IP address, encryption, digital signature;
S2.3 Safety Management Measures: supervision, control, calamity are standby, emergency services;
(2) clog-free
S3.1 personnel participating in the meeting's registration: participate in personnel's registration of power dispatching cloud consultation, comprise name, unit, department, post, IP address, MAC Address, submission subject under discussion and content;
Whether S3.2 has host, if enter spokesman's self-help model without S3.3, if there is S3.10 enter host's pattern of holding a conference or consultation;
S3.3 spokesman self-help model;
Whether S3.4 has host's mode request, if without S3.5, if there is S3.10 enter host's pattern of holding a conference or consultation;
S3.5 priority rule is chosen;
Whether S3.6 has priority rule conversion, if without S3.7, if there is S3.5;
S3.7 determines spokesman and order thereof according to priority rule;
S3.8 spokesman uses cloud to hold a conference or consultation, and sends high definition video conferencing stream, above delivers to and shows high in the clouds;
Whether S3.9 is complete or have people to require to interrupt, if without S3.7, if there is S3.4;
The S3.10 host pattern of holding a conference or consultation;
Whether S3.11 host declares the closing of, and S3.12 if not, if finish;
Whether S3.12 host specifies use, and S3.13 if not, if S3.15;
S3.13 spokesman application;
S3.14 host is confirmed whether approval, and S3.13 if not, if S3.15;
S3.15 spokesman uses cloud to hold a conference or consultation, and sends high definition video conferencing stream, above delivers to and shows high in the clouds;
Whether S3.16 is complete or have people to require to interrupt, if without S3.15, if there is S3.11;
(3) aobvious high definition
Correspondence is held a conference or consultation and is shown the high definition video conferencing stream of every road 720p to improve quality, and comprises following 2 steps:
Construct IP network: the full-duplex bandwidth wired and/or network that wireless transfer channel forms is not less than 33Mbps;
Show high definition: the presentation device of holding a conference or consultation that comprises projecting apparatus and display screen is supported the high definition video conferencing of 720p to improve quality;
Described step (2) is clog-free is the Random Service feature of holding a conference or consultation according to the intelligentized cloud of power scheduling, utilizes queueing theory mathematical method, sets up Mathematical Modeling, comprising:
If total c the cloud magic lantern of holding a conference or consultation, the average service rate of the cloud magic lantern that each need to be held a conference or consultation is u, and under normal circumstances, the average arrival rate of power scheduling message flow event is λ, and the probability that △ t has a power scheduling message flow event to arrive in the time is P
1=λ △ t, the probability that has a power scheduling message flow event exit within the △ t time is q
1=λ △ t;
Three kinds of situations below minute:
(1) when unregulated power scheduling message stream event, the probability of three kinds of mutually exclusive events is respectively:
(a) in time t, there is no power scheduling message flow event queuing, the probability that △ t does not have power scheduling message flow event to arrive constantly is yet P
0(1-λ △ t);
(b) in time t, there is a power scheduling message flow event, in △ t, do not have power scheduling message flow event to arrive, but the probability that has a power scheduling message flow event to accept to leave away after cloud is held a conference or consultation is P
1(1-λ △ t) u △ t;
(c) in time t, there is no power scheduling message flow event queuing, but at △ t, constantly, have a power scheduling message flow event to arrive, the probability that also has a power scheduling message flow event to accept to leave away after cloud is held a conference or consultation is P
0λ △ tu △ t;
P
0=P
0(1-λ △ t)+P
1(1-λ △ t) u △ t+P
0λ u (△ t)
2
Omit second order in a small amount, arrange to obtain P
1=λ P
0/ u;
(2) when existing n power scheduling message flow event, and during 1≤n<c, can be divided into following four kinds of situations:
(a) in time t, have n-1 power scheduling message flow event queuing up, △ t has a power scheduling message flow event to arrive constantly, but the probability of being held a conference or consultation by cloud without any power scheduling message flow event is P
n-1λ △ t (1-nu △ t);
(b) in time t, have n+1 power scheduling message flow event queuing up, △ t does not have power scheduling message flow event to arrive constantly, but the probability that has a power scheduling message flow event to accept to leave away after cloud is held a conference or consultation is P
n+1(1-λ △ t) [(n+1) u △ t];
(c) in time t, have n power scheduling message flow event queuing up, △ t does not have power scheduling message flow event to arrive constantly, and the probability of also being held a conference or consultation by cloud without any power scheduling message flow event is P
n(1-λ △ t) (1-nu △ t);
(d) in time t, have n power scheduling message flow event queuing up, △ t has a power scheduling message flow event to arrive constantly, and the probability that also has a power scheduling message flow event to accept to leave away after cloud is held a conference or consultation is P
nλ △ tnu △ t;
(3) during power scheduling message flow event number n >=c, similar with situation (2), but corresponding probability is respectively:
（a）P
n-1(λ△t)(1-cμ△t)
（b）P
n+1(1-λ△t)(cμ△t)
（c）P
n(1-λ△t)(1-cμ△t)
（d）P
n(λ△t)cμ△t
By formula above, obtained:
The probability of stability that solves system is:
Only have when λ/c μ <1, the cloud magic lantern service system that just can make to hold a conference or consultation reaches stable state and can not line up unlimited queue, and the service intensity of the cloud magic lantern system of holding a conference or consultation is
the utilance of the cloud magic lantern system of holding a conference or consultation;
The service rate of the cloud magic lantern system of holding a conference or consultation is:
While having the individual power scheduling message flow of n (n<c) event in system, the service rate of system is n μ; While having c power scheduling message flow event in system, the service rate of system reaches maximum c μ; When the power scheduling message flow event number in system surpasses c, because c information desk all hurried in, all the other power scheduling message flow events must be queued up, and service rate is at this moment still c μ; Can obtain thus,
Power scheduling message flow event queuing length in system is
The mean waiting time of power scheduling message flow event in system is
The average waiting time of power scheduling message flow event in system
Average electric power scheduling message stream event number in system
Wherein, defined parameters is:
L
q: the average queue length in system;
Wq: the mean waiting time of power scheduling message flow event in system, each power scheduling message flow event is wished more short better during this period of time;
W
s: the average waiting time of power scheduling message flow event in system;
L
s: the average electric power scheduling message stream event number in system;
λ: average arrival rate;
μ: average service rate;
C: the number of the cloud magic lantern of holding a conference or consultation in parallel in system;
ρ: service intensity, i.e. average service time in each cloud magic lantern unit interval of holding a conference or consultation;
P
0: the probability of stability of system.
2. the method for claim 1, is characterized in that step S3.5 priority rule comprises following 6 classes:
One, according to submission subject under discussion and the content of personnel participating in the meeting's registration, importance is descending, determines priority query;
Its two, according to the application time order of personnel participating in the meeting registration, { Xi} has Markov character, determines priority query to utilize queueing theory discrete time stochastic process;
Its three, according to the unit sequence of personnel participating in the meeting registration, determine priority query;
Its four, according to department's specialty sequence of personnel participating in the meeting registration, determine priority query;
Its five, according to post and the name sequence of personnel participating in the meeting registration, post is descending, with post, according to name lexicographic order, determines priority query;
They are six years old, in power dispatching cloud consultation process, there are successively personnel to add while holding a conference or consultation, application Random Service queueing theory mathematical method determines that priority query's rule is: after emergency event, to first service (LCFS), be M/M/c/LCFS model, important issue and content band Priority Service power (PR) are M/M/c/PR model, inferior important issue and content Random Service (SIRO) are M/M/c/SIRO model, and in remaining general subject under discussion and properties collection, adopting First Come First Served (FCFS) is M/M/c/PR model.
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| US11258676B2 (en) | 2011-09-14 | 2022-02-22 | Barco N.V. | Electronic tool and methods for meetings |
| US10762002B2 (en) | 2011-09-14 | 2020-09-01 | Barco N.V. | Electronic tool and methods with audio for meetings |
| US8756348B2 (en) * | 2011-09-14 | 2014-06-17 | Barco N.V. | Electronic tool and methods for meetings |
| EP3220633A1 (en) * | 2011-09-14 | 2017-09-20 | Barco N.V. | Electronic tool and methods for meetings |
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| CN102611914B (en) * | 2012-03-02 | 2015-02-04 | 广州市睿福信息科技有限公司 | Cloud television application service system and method |
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| CN104702885A (en) * | 2015-03-19 | 2015-06-10 | 民政部国家减灾中心 | Integrated application system of consultation, study and judge platform |
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