CN102651754B - Method, equipment and system for white board content sharing - Google Patents
Method, equipment and system for white board content sharing Download PDFInfo
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Abstract
The invention provides a method, equipment and a system for white board content sharing, and the system comprises the equipment and adopts the method. The method, which is used for sharing the white board content of a plurality of nodes in the same white board content sharing system, comprises the following steps: at least one node calculates node level which is sent to the a node with a token; whether the node with the token has the highest node level or not is confirmed; and in case the node with the token has the highest node level, the white board content of the node is shared with other nodes, otherwise, the token of the node is sent to the node with the highest node level, and the node with the highest level shares the white board content to other nodes.
Description
Technical field
The present invention relates to a kind of blank content sharing method, blank content shared device and system, and relate to particularly a kind of for be in share content between the multiple nodes in same blank content share system blank content sharing method, a kind of be arranged in blank content share system a node and to be in this blank content share system other nodes sharing blank content blank content shared device and a kind ofly comprise described blank content shared device and perform the blank content share system of described blank content sharing method.
Background technology
At present, blank content sharing technique is applied in teleconference gradually.In blank content share system, by the equipment of blank (whiteboard), camera, projecting apparatus and such as personal computer etc. is combined as a node, meeting participant writes or wipes content on local blank, local blank content is taken by camera, captured local blank content is sent to another meeting participant, and by projecting apparatus by the blank content projection that receives from described another meeting participant on local blank, thus the blank content that can be implemented between two nodes is shared.That is, existing blank content share system adopts the synchronization mechanism of a kind of reciprocating (ping-pang), and it only can support two nodes during a session.
Along with transaction is day by day heavy, in teleconference, often tend to there is multiple meeting participant, namely, multiple node, existing blank content share system cannot solve the problem that there is multiple node during a session, thus can not meet and carry out the shared needs of blank content at multiple node.
Share to carry out blank content among multiple nodes, consider to use client/server mechanism, its relevant information must be sent to server in view of multiple client node and perform various information processing at this server place and the blank content that will share shares to all clients, to be quite high at the processing load at server place, its processing delay and data send delay etc. all will affect the speed and efficiency, the therefore bottleneck that will become in blank content share system of server that blank content shares.In addition, server maintenance is also the problem that will consider.Therefore, client/server mechanism can not meet well multiple node carry out blank content share needs.
Therefore, exist and can support the blank content sharing method of multiple node and the needs of system for a kind of during a session, and for a kind of can to the needs of the blank content shared device of other nodes sharing blank content multiple.
Summary of the invention
Consider the problems referred to above and propose the present invention.An object of the present invention is to provide a kind of blank content sharing method, it can be at least one Nodes in the multiple nodes in same blank content share system and calculating the node level of this node, the node with most high node grade is dynamically selected at the Nodes with token, the node of this most high node grade becomes owner of a token (token holder) and its blank content is shared to other node, thus realizes Sharing Whiteboard content among multiple nodes.
According to an aspect of the present invention, provide a kind of blank content sharing method, for being in Sharing Whiteboard content between the multiple nodes in same blank content share system, this blank content sharing method comprises: at least one node in described multiple node is according to the predetermined attribute of this node, calculate the node level of this node, and send it to the node in described multiple node with token; According to the node level of himself and the node level that receives, the described node with token determines whether it has most high node grade; When the described node with token has most high node grade, its blank content is shared to other node by this node with most high node grade; And when the described node with token does not have most high node grade, the described node token with token is sent to the node with most high node grade, and described in there is most high node grade node its blank content is shared to other node.
Preferably, in blank content sharing method according to the present invention, the described node with token determines that the step whether it has most high node grade comprises: described in there is token node according to the node level of himself and the node level that receives, create overall routing table; The described node with token inquires about most high node grade in created overall routing table; And described in there is token node determine whether it has this most high node grade.
Preferably, in blank content sharing method according to the present invention, also comprise: when the described node with token does not have most high node grade, described in there is token node created overall routing table is sent to described in there is the node of most high node grade.
In blank content sharing method according to the present invention, preferably, described predetermined attribute comprises at least one in content changing rate, focus distance, token stand-by period and node-node transmission speed.
Preferably, at least one node described, this Nodes current whiteboard content and the blank content be shared recently are subtracted each other, to determine the blank content changing scope of this Nodes, thus calculate described content changing rate.
Preferably, in at least one node described, utilize the current hotspot of this Nodes and last focus to determine described focus distance, described current hotspot is the blank content area determined by the described blank content changing scope of this Nodes, and described last focus is the blank content area determined with the difference of the blank content be shared before it by the described blank content be shared recently.
Preferably, in at least one node described, sue for peace after the content changing rate of this Nodes, focus distance, token stand-by period and node-node transmission speed respectively weighting, to calculate the node level of this node, and described weighting meets following relation: the weight of the weight > focus distance of the weight > node-node transmission speed of the weight > token stand-by period of content changing rate.
In addition, another object of the present invention is to provide a kind of blank content shared device, it is arranged in a node of blank content share system, and calculate its node level according to the predetermined attribute of this node, judge when this node has token whether this node has most high node grade, and then to share according to the blank content that described judged result realizes this Nodes or the token of this Nodes sends.
According to a further aspect in the invention, provide a kind of blank content shared device, it is arranged in a node of blank content share system, and for other nodes sharing blank content be in this blank content share system, comprise: node level calculation element, for calculating the node level of this node according to the predetermined attribute of this node; Node level receiving system, for receiving the node level of respective nodes from least one other node this blank content share system when this node has token; Most high node grade determining device, for determining when this node has token whether this node has most high node grade; Blank content sharing apparatus, shares to other node by the blank content of this node for having token at this node and having most high node grade; And token dispensing device, when not having a most high node grade for having token at this node, token is sent to the node with most high node grade.
Preferably, according to blank content shared device of the present invention, also comprise: overall routing table creation apparatus, for when this node has token according to the node level of himself and the node level that receives, create overall routing table.
In addition, described most high node grade determining device inquires about most high node grade in created overall routing table, and determines whether this node has this most high node grade.
Preferably, according to blank content shared device of the present invention, also comprising: node level dispensing device, when token, the node level of this node being sent to the node with token for not having at this node; And token receiving system, receive token from the node sending token there is for not having token at this node most high node grade.
In blank content shared device according to the present invention, preferably, described predetermined attribute comprises at least one in content changing rate, focus distance, token stand-by period and node-node transmission speed.
Preferably, this Nodes current whiteboard content and the blank content be shared recently are subtracted each other by described node level calculating unit, to determine the blank content changing scope of this Nodes, thus calculate described content changing rate.
Preferably, described node level calculating unit utilizes current hotspot and last focus to determine described focus distance, described current hotspot is the blank content area determined by the described blank content changing scope of this Nodes, and described last focus is the blank content area determined with the difference of the blank content be shared before it by the described blank content be shared recently.
Another object of the present invention is to provide a kind of blank content share system, wherein can be implemented in Sharing Whiteboard content between multiple node.
According to another aspect of the invention, provide a kind of blank content share system comprising multiple node, each node comprises according to blank content shared device of the present invention, and performs according to blank content sharing method of the present invention in this blank content share system.
According to blank content sharing method and the blank content share system of the above-mentioned aspect of the present invention, according to the node level that at least one Nodes in multiple nodes in this blank content share system calculates based on the predetermined attribute of this node, the node with most high node grade is dynamically selected at the Nodes with token, namely the node of its blank content will be shared, the node of this most high node grade becomes owner of a token and its blank content is shared to other node, thus the alternative space realized between multiple nodes of this blank content share system and blank content are shared.
According to the blank content sharing method of the above-mentioned aspect of the present invention, blank content shared device and blank content share system, introduce in blank content share system by token, dynamically can to determine in the multiple nodes comprised at blank content share system which node is current can to other nodes sharing blank content, and the bottleneck problem at server place under it also avoid client terminal/server structure.
Accompanying drawing explanation
Embodiments of the present invention is described in detail in conjunction with the drawings, and above and other objects of the present invention, feature, advantage will become apparent, wherein:
Fig. 1 illustrates the blank content share system according to the embodiment of the present invention.
Fig. 2 illustrates the blank content sharing method according to the embodiment of the present invention.
Fig. 3 illustrates the example flow of the step S202 in the blank content sharing method shown in Fig. 2.
Fig. 4 illustrates the classification example of multiple node hierarchy in the blank content sharing method according to the embodiment of the present invention.
Fig. 5 (A) and (B) illustrate the example calculating content changing scope in the blank content sharing method according to the embodiment of the present invention.
Fig. 6 illustrates the blank content shared device according to the embodiment of the present invention.
Fig. 7 illustrates the improvement to the blank content shared device shown in Fig. 6.
Fig. 8 illustrates another improvement to the blank content shared device shown in Fig. 6.
Fig. 9 (A)-(G) illustrates the example of the workflow that blank content is shared in the blank content share system according to the embodiment of the present invention.
Embodiment
Describe below with reference to accompanying drawings according to the blank content sharing method of the embodiment of the present invention and blank content share system and blank content shared device.
First, with reference to Fig. 1, the blank content share system 100 according to the embodiment of the present invention is described.This blank content share system 100 except comprise user can on its corresponding blank written contents or erasing content common blank content sharing nodes R1, R2, R3 and R4 (hereinafter, referred to as ordinary node) outside, blank content sharing nodes R5, R6 and R8 and the read-only node R 7 of other type can also be comprised.
Common blank content sharing nodes R1, R2, R3 and R4 can comprise user thereon written contents or erasing content blank, for catch blank content camera, for by received blank content projection to the projecting apparatus on blank and such as personal computer and so on have that data store, the equipment of process and transmitting capacity.
Blank content sharing nodes R5, R6 and R8 of other type can comprise such as support multiple point touching display panel (multi-touch display board) (R8), electronic writing plate (e-writer), personal digital assistant PDA (R5 and R6), cloud computing plate (cloud board) or interactive projector (interactiveprojector) and so on equipment.
At read-only Nodes, blank content is not modified, therefore not to its blank content of other nodes sharing.Read-only node can comprise PDA or smart phone (R7) etc.
Although not only comprise common blank content sharing nodes but also comprise the blank content sharing nodes of other type and read-only node in system as shown in Figure 1, the present invention is not limited thereto.Only can comprise common blank content sharing nodes according to blank content share system of the present invention, or only comprise the blank content sharing nodes of other type.To introduce for the ordinary node comprising conventional white board according to blank content sharing method of the present invention and blank content shared device below.
When user's written contents or when wiping content from blank, blank content changes on blank.But at short notice, blank content changing is not too large.Therefore, according to practical application, the suitable time interval can be designed, there is the node R 1 of blank, R2, R3 and R4 utilize respective camera to catch respective blank content every this time interval, and according to running once according to the blank content sharing method of the embodiment of the present invention in the blank content share system of the embodiment of the present invention, that is: at node R 1, R2, R3 and R4 place with blank, respective node level is calculated based on respective predetermined attribute; There is the Nodes of token, determining the node in R1, R2, R3 and R4 with most high node grade; And the node with most high node grade becomes owner of a token and its blank content is shared to other node.
With reference to Fig. 2, the blank content sharing method 200 according to the embodiment of the present invention is described.
In step S201, in multiple nodes of this blank content share system can on blank written contents or wipe each Nodes of content from blank, calculate the node level of this node according to the predetermined attribute of this node, and when this node does not have token, calculated node level is sent to the node in described multiple node with token.As mentioned below, described predetermined attribute can comprise at least one in content changing rate, focus distance, token stand-by period and node-node transmission speed.
Next, in step S202, described in there is token node determine whether it has most high node grade according to the node level of himself and the node level that receives.
If the determination result of step S202 is "Yes", then its blank content is shared to other node by this node having a most high node grade in step S203.
Otherwise if the determination result of step S203 is "No", then the node token described in step S204 with token is sent to the node with most high node grade.Subsequently, its blank content is shared to other node by the node having most high node grade described in step S205.
Next, the example detailed flow of the step S202 in Fig. 2 is described with reference to figure 3.
As shown in Figure 3, in step S2301, described in there is token node create overall routing table according to the node level of himself and the node level that receives.
Exemplarily, each entry in described overall routing table corresponds respectively to a node, and comprises the father node of the mark ID of this node, the node level of this node and this node.
T={<ID, node level, father node >}
Next, in step S2302, described in there is token node in created overall routing table, inquire about most high node grade.
Then, in step S2303, described in there is token node determine whether it has this most high node grade.
Although above composition graphs 3 give described in there is token node create overall routing table and in created overall routing table, inquire about the example of most high node grade, the present invention is not limited thereto.By directly judging that whether its node level is the highest, the node described in one of ordinary skill in the art will readily recognize that with token can determine whether it has most high node grade, and without the need to carrying out step S2301 in Fig. 3 and S2302.
In addition, as the improvement to the blank content sharing method shown in Fig. 2, when the described node with token creates overall routing table, described in there is token node token can be sent to the node with most high node grade together with created overall routing table in step S204.Then, its blank content is shared to respective nodes in step S205 according to received overall routing table by the node described in most high node grade.
As the further improvement to the blank content sharing method shown in Fig. 2, in order to have the data volume of the Nodes of most high node grade described in effectively reducing, can be several ranks by the multiple node division in blank content share system.In this case, created overall routing table can also be supplied in multiple nodes of blank content share system and be in high level node.
Such as, as shown in Figure 4, for simple system, can be three ranks by the multiple node division in blank content share system: there is the blank content sharing nodes of most high node grade, with the blank content sharing nodes first level node that is father node and the second level node that is father node with one of first level node.
In this case, there is the node sharing its blank content of most high node grade according to the overall routing table received, the first level node that to share to it by its blank content be father node, then, the second level node that it is father node that received blank content sequentially shares to it by first level node.In addition, in this case, also created overall routing table is supplied to described first level node.
In addition, can as required, be more rank by the multiple node division in blank content share system, and in a fashion similar to that described above, level by level ground Sharing Whiteboard content.
But, the present invention is not limited thereto, described in there is most high node grade node directly its blank content can be shared to other node in step S205.
The determination of the node level according to the embodiment of the present invention will be described in detail below for a node.Node level is the parameter of the priority representing this nodes sharing blank content.The node level of this node is determined according at least one item in the amount relevant to content changing of this Nodes, token stand-by period and node-node transmission speed.The described amount relevant to content changing can comprise blank content changing rate.
Fig. 5 (A) and (B) illustrate the example calculating content changing rate in the blank content sharing method according to the embodiment of the present invention.
At this Nodes, every given interval, caught the current whiteboard content of the blank of this Nodes by the camera of this Nodes, and it is stored.Next, by this Nodes current whiteboard content and the last blank content stored being subtracted each other, obtain blank content changing scope, thus Computed-torque control rate of change.
Such as, at this Nodes, current whiteboard content and last blank content are carried out rgb value and subtracts each other, obtain blank content changing scope.In Fig. 5 (A), the letter " B " in the rightest figure is blank content changing scope, and correspondingly, in Fig. 5 (B), the letter " C " in the rightest figure is blank content changing scope.Described last blank content is the stored blank content be shared recently.
The pixel RGB difference of each pixel corresponding to blank content area can be calculated according to the following formula:
R(i，j)＝C(i，j)-P(i，j)(i＝0...m，j＝0...l) (1)
Wherein C (i, j) be pixel (i, j) current rgb value, P (i, j) is pixel (i, j) last rgb value, the RGB difference that R (i, j) is pixel (i, j), m is total line number of blank content, and l is total columns of blank content.
In addition, according to the following formula threshold value can be set to R (i, j):
When R (i, j) is less than threshold value δ, R (i, j) is set to 0, and when R (i, j) is more than or equal to threshold value δ, R (i, j) is set to its absolute value.
Then, according to R (i, the j) value after conversion, blank content changing scope is determined.Such as, the number of pixels S that pixel RGB values can be utilized to change
urepresent the size of blank content changing scope.
The number of pixels S that pixel RGB values is changed
udivided by the total number-of-pixels S of blank content area
r, i.e. (m × l), to obtain blank content changing rate, that is, blank content changing percentage r=S
u/ S
r.
Blank content changing rate is higher, shows that this node requirements shares the wish of its blank content stronger, correspondingly, should have the higher priority sharing its blank content.
When the initial start of blank content share system, at this Nodes, the blank content that this is shared recently is such as empty, or the given blank content for arranging according to each making an appointment of node.
Except blank content changing rate, the described amount relevant to content changing can also comprise focus distance.At this Nodes, meeting participant pay close attention to certain specific blank content area and in this specific blank content area written contents or erasing content, hereinafter, this specific blank content area is called focus.
At this Nodes, focus distance is the distance between current hotspot and last focus.As mentioned above, this current hotspot is the specific blank content area received publicity at this Nodes, that is, the blank content area determined by the described blank content changing scope of this Nodes.Last focus is the blank content area determined with the difference of the blank content be shared before it by the described blank content be shared recently.
Still describe the determination of focus and the calculating of focus distance in detail with reference to figure 5 (A) and Fig. 5 (B).
As shown in Fig. 5 (B), the most left figure represents current whiteboard content, and middle graph represents last blank content, that is, the blank content be shared recently stored, and the rightest figure represents blank content changing scope.
In the rightest figure of Fig. 5 (B), letter " C " represents current whiteboard content changing scope, and the region tightly around " C " is confirmed as current hotspot.According to actual needs, the region around " C " can be any suitable shapes such as rectangle, circle, ellipse, rhombus, polygon.
In addition, redefine each figure in Fig. 5 (A), the most left figure represents described last blank content, namely, the blank content be shared recently stored, middle graph represents the last blank content before described last blank content, namely stored immediately preceding the blank content be shared before the blank content be shared recently, and the rightest figure represents last blank content changing scope.
In the rightest figure of Fig. 5 (A), letter " B " represents last blank content changing scope, and the region tightly around " B " is confirmed as last focus.Equally, the region around " B " can be any suitable shapes such as rectangle, circle, ellipse, rhombus, polygon.
Preferably, the focus distance between current hotspot and last focus is calculated as the Euler distance d=min{dist (B, C) between current hotspot and last focus }.In addition, simply the focus distance between current hotspot and last focus can also be calculated as the distance between the center of current hotspot and the center of last focus.
Focus distance is less, and the content changing showing this node is higher with the degree of correlation of the current content discussed, and correspondingly should have the priority of higher its blank content shared.
As mentioned above, at this Nodes, the blank content storing current seizure, the blank content be shared recently and immediately preceding the blank content be shared before the blank content be shared recently.As replacement, at this Nodes, the blank content that also can store current seizure, the blank content be shared recently and last focus.
In addition, as mentioned above, except described content changing rate and focus distance, the node level of this node can also be determined according to token stand-by period and node-node transmission speed.
Token stand-by period of this node has stand-by period token from this node the last time.In certain embodiments, the token stand-by period is longer, shows that the hope of this its content of nodes sharing is stronger, correspondingly should have the higher priority sharing its blank content.
But, unlike this, in further embodiments, one given threshold value can be set for the token stand-by period, when the token stand-by period exceedes this given threshold value, can think that the hope of this its content of nodes sharing is very little, correspondingly should have the lower priority sharing its blank content.As improvement, according to actual needs for the token stand-by period arranges multiple threshold value, in different threshold range, different incidence relations can also be there is between token stand-by period and the priority of shared content.
Therefore, can define according to specific needs token stand-by period and node etc. incidence relation between some grade.
In addition, when node-node transmission speed is slower, in order to make this node as soon as possible its blank content be shared to other node, this node can be made to have the higher priority sharing its blank content.
When adopting content changing rate, focus distance, node-node transmission speed and at least one item in the token stand-by period to determine the node level of node as parameter, the coefficient of each parameter can be set based on result of the test, or also can share in session in each blank content and determine described coefficient adaptively.
As sharing in session the example determining described coefficient adaptively in each blank content, when at the same time content changing rate, focus distance, node-node transmission speed and token stand-by period being determined the node level of node as parameter, the node level of node can be determined according to following formula:
Wherein, R
ibe the node level of the i-th node, r
ibe the content changing rate of the i-th node, t
ibe the token stand-by period of the i-th node, s
ibe the node-node transmission speed of the i-th node, d
ibe the focus distance of the i-th node, n is total ordinary node number, and α, β, γ, η are overall coefficient.
Such as, described overall factor alpha, β, γ, η is determined according to the coefficient of each Nodes:
At each Nodes, calculate the factor alpha of this Nodes respectively
i, β
i, γ
i:
α
i＝f(S
ui)
β
i＝g(s
ui)
(4)
γ
i＝h(S
ui)
η
i＝c
Wherein S
uibe the number of pixels that the i-th Nodes pixel RGB values changes, f (S
ui), g (S
ui) and h (S
ui) be all S
uifunction.
Exemplarily, can respectively above-mentioned function be taken as:
But, also described function can be taken as other form, as long as meet α > β > γ > η.Preferably, f (S
ui) middle S
uinumber of times higher than g (S
ui) middle S
uinumber of times, g (S
ui) middle S
uinumber of times higher than h (S
ui) middle S
uinumber of times.
When determining described parameter adaptively, the factor alpha that correspondingly can have the number of pixels that to transmit between the node of token and other node and change about each Nodes pixel RGB values or each node place and calculate as required
i, β
i, γ
iand so on information.Be not described in detail at this, not obscure inventive concept of the present invention.
Although be presented above the concrete example that parameter is determined, but the present invention is not limited thereto, as mentioned above, can come according to specific needs to define respectively content changing rate, the token stand-by period, focus distance, node-node transmission speed and node etc. incidence relation between some grade.
Next, with reference to figure 6, the blank content shared device 600 according to the embodiment of the present invention is described.This blank content shared device 600 is arranged in a node of blank content share system, and calculate its node level according to the predetermined attribute of this node, judge when this node has token whether this node has most high node grade, and then to share according to the blank content that described judged result realizes this Nodes or the token of this Nodes sends.Particularly, this blank content shared device 600 can realize, realizes in camera, realizes in the equipment of such as personal computer and so on or share in equipment in special blank content and realize in projecting apparatus.Described special blank content is shared equipment and projecting apparatus, camera and described blank content shared device 600 can be integrated.
This blank content shared device 600 comprises: node level calculation element 601, node level receiving system 602, most high node grade determining device 603, blank content sharing apparatus 604, token dispensing device 605 and token receiving system 606.
Node level calculation element 601 calculates the node level of this node according to the predetermined attribute of this node.As mentioned above, described predetermined attribute can comprise at least one in content changing rate, focus distance, token stand-by period and node-node transmission speed.
Such as, the blank content of the current seizure that this node place stores by this node level calculation element 601 is carried out RGB with the blank content be shared recently stored and is subtracted each other, obtain Current Content and change scope, and calculate current whiteboard content changing rate and current hotspot thus; By the stored blank content be shared recently with store carry out RGB immediately preceding the blank content be shared before the blank content be shared recently and subtract each other, obtain last content changing scope, and determine last focus thus.As replacement, when this node stores last focus, this node level calculation element 601 only calculates current whiteboard content changing rate and current hotspot, and without the need to calculating last focus again.Next, this node level calculation element 601 based on calculated current hotspot and calculate/the last focus that stores, calculate focus distance.
Then, node level calculation element 601 calculates the node level of this node according at least one in the content changing rate of this node, focus distance, token stand-by period and node-node transmission speed.
When this node has token, node level receiving system 602 receives the node level of respective nodes from least one other node this blank content share system.When this node has token, according to the node level of himself and the node level that receives, most high node grade determining device 603 determines whether this node has most high node grade.
When this node has token and has most high node grade, the blank content of this node is shared to other node by blank content sharing apparatus 604.On the other hand, when this node has token and do not have most high node grade, token dispensing device 605 token is sent to the node with most high node grade.
As mentioned above, its blank content is shared to other node when having token and have most high node grade by this blank content shared device 600, and when not having most high node grade when only having token, token is sent to the node with most high node grade.
Figure 7 illustrates the blank content shared device 700 as the improvement to the blank content shared device 600 shown in Fig. 6.Except each device shown in Fig. 6, blank content shared device 700 also comprises node level dispensing device 706 and token receiving system 707.In the figure 7, the Reference numeral identical with Fig. 6 is used to represent and identical device in Fig. 6.
When this node does not have token, the node level of this node is sent to the node with token by node level dispensing device 706.
When this node does not have token and has most high node grade, token receiving system 707 receives token from the node sending token.
Figure 8 illustrates as another the blank content shared device 800 improved to the blank content shared device 600 shown in Fig. 6.Except the device shown in Fig. 6, blank content shared device 800 also comprises overall routing table creation apparatus 808.In fig. 8, the Reference numeral identical with Fig. 6 is used to represent and identical device in Fig. 6.
When this node has token, overall routing table creation apparatus 808 creates overall routing table according to the node level of himself and the node level received.As mentioned above, each entry in described overall routing table corresponds respectively to a node, and comprises the father node of the mark ID of this node, the node level of this node and this node.
T={<ID, node level, father node >}
Next, described most high node grade determining device 603 inquires about most high node grade in created overall routing table, and determines whether this node has this most high node grade.
Those skilled in the art's easy understand, in blank content shared device 600, do not comprise overall routing table creation apparatus 808, and can directly judge that whether its node level is the highest by described most high node grade determining device 603 and determine whether it has most high node grade.
Then, when this node has token and has most high node grade, its blank content is shared to other node according to created overall routing table by blank content sharing apparatus 604.
On the other hand, when this node has token and do not have most high node grade, token dispensing device 605 token can be sent to the node with most high node grade together with overall routing table.In the case, be arranged in the blank content shared device 700 of the Nodes with most high node grade, token receiving system 707 receives token and overall routing table, and its blank content is shared to other node according to received overall routing table by blank content sharing apparatus 604.
As mentioned above, in order to have the data volume of the Nodes of most high node grade described in effectively reducing, can be several ranks by the multiple node division in blank content share system.Such as, for being the situation of three ranks by the multiple node division in blank content share system shown in Fig. 4, blank content sharing apparatus 604 according to received overall routing table, the first level node that only to share to it by its blank content be father node.
But the present invention is not limited thereto, its blank content directly can be shared to other nodes all in described blank content share system by blank content sharing apparatus 604, and without the need to reference to overall routing table.
Should be appreciated that can with the various forms of hardware, software, firmware, application specific processor or their combination to realize blank content shared device of the present invention and blank content sharing method.Preferably, the combination as hardware and software realizes blank content shared device of the present invention and blank content sharing method.In addition, can as the application program visibly comprised on program storage unit (PSU) to realize described software.Described application program can be uploaded to the machine that comprises any suitable framework and be performed by it.Preferably, described machine has the hardware of such as one or more CPU (" CPU "), random access memory (" RAM ") and I/O (" I/O ") interface and so on.
In addition, it is also understood that because preferably realize component devices more illustrated in the accompanying drawings and method with software, so the mode that can be programmed according to the present invention of the actual connection between these component devices or step and different.Provide instruction here, those of ordinary skill in the related art can expect these and similar realization or configuration of present principles.
The workflow according to embodiment of the present invention blank content sharing method is introduced below for the blank content share system be made up of three ordinary nodes R1, R2 and R3.
As shown in Fig. 8 (A), node R 1 is current has token.First, in node R 1, R2 and R3, calculate the node level of each node respectively.Its respective node level is sent to node R 1 by node R 2 and node R 3.
As shown in Fig. 8 (B), node R 1 has most high node grade according to the node level determination node R 1 of the node level of himself and the node R 2 received and node R 3.Then, as shown in Fig. 8 (C), its blank content is shared to node R 2 and R3 by node R 1.
After given interval, re-execute according to blank content sharing method of the present invention.As shown in Fig. 8 (D), node R 1 is current has token, calculates the node level of each node in node R 1, R2 and R3 respectively, and its respective node level is sent to node R 1 by node R 2 and node R 3.
As shown in Fig. 8 (E), node R 1 has most high node grade according to the node level determination node R 2 of the node level of himself and the node R 2 received and node R 3.
Next, as shown in Fig. 8 (F), node R 1 token sends to the node R 2 with most high node grade.Then, as shown in Fig. 8 (G), its blank content is shared to node R 1 and R3 by node R 2.
As improvement, as shown in Fig. 8 (B), node R 1 creates overall routing table according to the node level of the node level of himself and the node R 2 received and node R 3, and has most high node grade according to created overall routing table determination node R 1.Next, as shown in Fig. 8 (C), its blank content is shared to R2 and R3 according to created overall routing table by node R 1.
Then, as shown in Fig. 8 (E), node R 1 creates overall routing table according to the node level of the node level of himself and the node R 2 received and node R 3, and has most high node grade according to created overall routing table determination node R 2.Next, as shown in Fig. 8 (F), node R 1 token and the overall routing table created send to the node R 2 with most high node grade.Then, as shown in Fig. 8 (G), its blank content is shared to node R 1 and R3 according to received overall routing table by node R 2.
Although this with the ordinary node comprising conventional white board for background describes blank content sharing method of the present invention, blank content shared device, the present invention is not limited thereto.It will be appreciated by those skilled in the art that, blank content sharing method of the present invention also can be applied to during the blank content comprising other type of the equipment of the display panel, electronic writing plate, cloud computing plate, interactive projector and so on such as supporting multiple point touching as shown in Figure 1 shares, and only these equipment directly can obtain its blank content and without the need to being caught its blank content by camera and directly can showing received blank content and blank content without the need to being received by projector.
Workflow according to blank content sharing method of the present invention is introduced further for the blank content share system be made up of nine the node R 1-R9 (comprising five ordinary node R1-R5 and four read-only node R 6-R9) being divided into three ranks below with reference to Fig. 4.
Node R 3 is current has token.First, in node R 1-R5, calculate the node level of each node respectively, and its respective node level is sent to node R 3 by node R 1, R2, R4 and R5.
Next, node R 3 creates overall routing table according to the node level of the node level of himself and the node R 1 received, R2, R4 and R5, and has most high node grade according to created overall routing table determination node R 1.Such as, in created overall routing table, the father node of ordinary node R2, R3 and R5 is node R 1, and the father node of ordinary node R4 is node R 2, the father node of read-only node R 6 is node R 2, and the father node of read-only node R 7 and R8 is node R 3, and the father node of read-only node R 9 is node R 5.
Then, node R 3 token and the overall routing table created send to the node R 1 with most high node grade, and its blank content is directly shared to node R 2, R3 and R5 by node R 1, received blank content is shared to node R 4 and R6 by node R 2 again, received blank content is shared to node R 7 and R8 by node R 3 again, and received blank content is shared to node R 9 by node R 5 again.In the case, also overall routing table is supplied to node R 2 and R5.Directly created overall routing table node R 2 and R5 can be supplied to by R3, also by node R 1, overall routing table node R 2 and R5 can be supplied to.
But, the present invention is not limited thereto.According to above-mentioned instruction, one of ordinary skill in the art will readily recognize that according to actual needs, can be more rank by the multiple node division in blank content share system, and in a fashion similar to that described above, level by level ground Sharing Whiteboard content.
Although read-only node is called not to the node of its blank content of other nodes sharing above, but, those skilled in the art's easy understand, read-only node, can also as the node of not least rank to receive and to forward the blank content from other nodes sharing except receiving except the blank content of other nodes sharing with direct/indirect as other node of lowermost level.Further, read-only node even can to ordinary node forwarding from the blank content of other nodes sharing.
Although describe some embodiments of the present invention with reference to the accompanying drawings here, should be appreciated that described embodiment is only illustrative, and not restrictive.It will be appreciated by those skilled in the art that when not deviating from the scope and spirit of the present invention limited in claim and equivalent thereof, the change in various forms and details can be made these exemplary embodiments.
Claims (8)
1. a blank content sharing method, for being in Sharing Whiteboard content between the multiple nodes in same blank content share system, this blank content sharing method is comprising:
At least one node in described multiple node, according to the predetermined attribute of this node, calculates the node level of this node, and sends it to the node in described multiple node with token;
According to the node level of himself and the node level that receives, the described node with token determines whether it has most high node grade;
When the described node with token has most high node grade, its blank content is shared to other node by this node with most high node grade; And
When the described node with token does not have most high node grade, described in there is token node token be sent to the node with most high node grade, and described in there is most high node grade node its blank content is shared to other node,
Wherein, described predetermined attribute comprises at least one in content changing rate, focus distance, token stand-by period and node-node transmission speed, and
In each node of at least one node described, sue for peace after the predetermined attribute weighting of this Nodes, to calculate the node level of this node,
In at least one node described, this Nodes current whiteboard content and the blank content be shared recently are subtracted each other, to determine the blank content changing scope of this Nodes, thus calculate described content changing rate,
In at least one node described, utilize the current hotspot of this Nodes and last focus to determine described focus distance, described current hotspot is the blank content area determined by the described blank content changing scope of this Nodes, and described last focus is the blank content area determined with the difference of the blank content be shared before it by the described blank content be shared recently
Token stand-by period of node has stand-by period token from this node the last time.
2. blank content sharing method as claimed in claim 1, wherein, described in there is token node determine that the step whether it has most high node grade comprises:
The described node with token, according to the node level of himself and the node level that receives, creates overall routing table;
The described node with token inquires about most high node grade in created overall routing table; And
The described node with token determines whether it has this most high node grade.
3. blank content sharing method as claimed in claim 2, also comprises:
When the described node with token does not have most high node grade, described in there is token node created overall routing table is sent to described in there is the node of most high node grade.
4. blank content sharing method as claimed in claim 1, wherein at least one node described, sue for peace after the content changing rate of this Nodes, focus distance, token stand-by period and node-node transmission speed respectively weighting, to calculate the node level of this node, and described weighting meets following relation: the weight of the weight > focus distance of the weight > node-node transmission speed of the weight > token stand-by period of content changing rate.
5. a blank content shared device, it is arranged in a node of blank content share system, and for other nodes sharing blank content be in this blank content share system, comprising:
Node level calculation element, for calculating the node level of this node according to the predetermined attribute of this node;
Node level receiving system, for receiving the node level of respective nodes from least one other node this blank content share system when this node has token;
Most high node grade determining device, for determining when this node has token whether this node has most high node grade;
Blank content sharing apparatus, shares to other node by the blank content of this node for having token at this node and having most high node grade; And
Token dispensing device, when not having a most high node grade for having token at this node, token is sent to the node with most high node grade,
Wherein, described predetermined attribute comprises at least one in content changing rate, focus distance, token stand-by period and node-node transmission speed, and
In each node of at least one node described, node level calculation element is sued for peace after the predetermined attribute weighting of this Nodes, to calculate the node level of this node,
This Nodes current whiteboard content and the blank content be shared recently are subtracted each other by described node level calculation element, to determine the blank content changing scope of this Nodes, thus calculate described content changing rate; And
Described node level calculation element utilizes current hotspot and last focus to determine described focus distance, described current hotspot is the blank content area determined by the described blank content changing scope of this Nodes, and described last focus is the blank content area determined with the difference of the blank content be shared before it by the described blank content be shared recently
Token stand-by period of node has stand-by period token from this node the last time.
6. blank content shared device as claimed in claim 5, also comprises:
Overall situation routing table creation apparatus, for when this node has token according to the node level of himself and the node level that receives, create overall routing table,
Wherein, described most high node grade determining device inquires about most high node grade in created overall routing table, and determines whether this node has this most high node grade.
7. blank content shared device as claimed in claim 5, also comprises:
Node level dispensing device, for being sent to the node with token when this node does not have token by the node level of this node; And
Token receiving system, receives token from the node sending token when having most high node grade for not having token at this node.
8. comprise a blank content share system for multiple node, each node comprises the blank content shared device as described in claim 5-7, and in this blank content share system, perform the method as described in claim 1-4.
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| US20160173545A1 (en) * | 2014-12-16 | 2016-06-16 | Wistron Corporation | Method of sharing control right adapted to interactive whiteboard system and host device thereof |
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| CN103281314A (en) * | 2013-05-13 | 2013-09-04 | 南昊（北京）科技有限公司 | Electronic whiteboard based on priority and interaction method thereof |
| CN106202074B (en) * | 2015-04-29 | 2021-02-23 | 中兴通讯股份有限公司 | Method and device for processing shared file |
| US10129335B2 (en) * | 2016-01-05 | 2018-11-13 | Quirklogic, Inc. | Method and system for dynamic group creation in a collaboration framework |
| CN111262874A (en) * | 2020-01-21 | 2020-06-09 | 北京梦想加信息技术有限公司 | Writing board information sharing method and system and writing board |
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| CN1365460A (en) * | 1999-06-30 | 2002-08-21 | 西尔弗布鲁克研究股份有限公司 | Method and system for conferencing |
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| JP2006031359A (en) * | 2004-07-15 | 2006-02-02 | Ricoh Co Ltd | Screen sharing method and conference support system |
| JP2006164177A (en) * | 2004-12-10 | 2006-06-22 | Ricoh Co Ltd | Electronic conference system |
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| CN1365460A (en) * | 1999-06-30 | 2002-08-21 | 西尔弗布鲁克研究股份有限公司 | Method and system for conferencing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160173545A1 (en) * | 2014-12-16 | 2016-06-16 | Wistron Corporation | Method of sharing control right adapted to interactive whiteboard system and host device thereof |
| US9894123B2 (en) * | 2014-12-16 | 2018-02-13 | Wistron Corporation | Method of sharing control right adapted to interactive whiteboard system and host device thereof |
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