CN1972473A

CN1972473A - Communication node, server and system

Info

Publication number: CN1972473A
Application number: CNA2006101424317A
Authority: CN
Inventors: 福嶋一
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-10-24
Filing date: 2006-10-24
Publication date: 2007-05-30
Also published as: JP5466144B2; JP2011109688A

Abstract

A communication node can be discovered as a target, a target discovering server which provides a target discovering process to a transmitting souce communication node, controls the target discovering process based on an exterior circumstance detected by an exterior circumstance detection unit.

Description

Communication node, server and system

Technical field

The present invention expands the target side discovery procedure in the net.No matter net is that store and forward switched network or circuit-switched network all can.

Particularly, belong to following technology: by with the sender for the presentation target side information that specifies target side and use, set up related for the information of the identification realistic objective side that specifies the employed communication node of recipient and use with net, get access in the net of attainability of target side communication node, have the recipient under the situation of an above communication node, by specifying one of them communication node as the found technology of single target side.

Background technology

Adapt to the mobile phase of people's physics, wish to carry out to arrive the communication of oneself from other people.

Now, carrying with the people is prerequisite, is obtained to realize the approach of this communication by single mobile communicating node such as mobile phone or PDA.These communication nodes are inoperative under the situation that can't receive electric wave.

And, also notebook PC etc. is used for the use aspect that dials from the hotel of moving target side.In this case, can't received signal in moving.

Like this, initial unworkable reason is, in the communication that is used for arriving mobile people, and must be by the preconception of the single communication node received signal that moves with the people.

On the other hand, the employed terminal of general recipient after the network commercialization is to have the address of change and do not have terminal as the specific identifier of communication counterpart.Also wish to communicate with such terminal.What attempted at first is to setting unique system that specifies the identifier of communication counterpart and make the address of its tracking change, to entrust to specify communication counterpart.For example there are webhop, IMPP (RFC2778, RFC2779), dynamic-dns (RFC2136, RFC3007), SIP (RFC3261-3265, RFC3856), ENUM (RFC2916, RFC3401-3406, RFC3761) etc. in such system.And there is IP Mobility (RFC3344, RFC3775, RFC3963) in the system that can follow the tracks of the address of change to fixing address.And, HLR (attaching position register) of cellular phone etc. (below, these are referred to as " target side discovery server ") is arranged in circuit-switched network.

Summary of the invention

The objective of the invention is to, providing a kind of is not to come received signal by single communication node, but from a plurality of communication nodes the recipient is moved forward into line trace between communication node, makes the method for the yet redirect of communication node (hop) of received signal.

Finally, can find (received signal) as target side with being positioned at recipient neighbouring communication node or the specified communication node of recipient.

That is, move between tracking recipient's main frame, the communication node that the recipient is specified allows the transmission source find as target side.

(invention effect)

1. under electric wave quality rugged environment, portable communication node is inoperative.Even but under such environment, also can make with wired or wireless other communication node received signals as bottom (layer).

2. to coordinate between the found communication node in order making as target side, spontaneously to move by each communication node, current undiscovered communication node is matched with the position of keeping current found communication node.

That is, when having current found communication node, other communication nodes suppress the discovery procedure of controlled target side.The control of the target side discovery procedure of manually carrying out thus, can be used as the reflection of initiating for the first time.This be because: if the communication node of controlled target side's discovery procedure automatically is not suppressed, even then for example by manually controlling, other communication nodes also can be rewritten (overwritten) by the control of the target side discovery procedure carried out automatically.

3. in the present invention, even under situation about being included in by the communication node that distributes the address regularly and constitute in the group, by the communication node redirect that is associated with static identifier, and the address related with static identifier also must become dynamically.Thus, can be to the address by the communication node that distributes regularly and constitute be dynamically allocated and the communication node unification that constitutes is handled.

4. scalable (scalable).The number of increase and decrease communication node in the found communication node group, do not rely on the number of the communication node that constitutes this group can be used as target side, even can provide the target side discovery procedure based on recipient's initiation yet.Therefore, even when first communication node is single node, also can freely add communication node behind at it.

5. mini system (small system).The pattern that has central computer is called " refreshing pattern (godmodel) ".In the past, found to rule as the starting point of imagining as server such as the god with target side, and designed net.What realize therefrom is the huge social system.Mulitix (being a kind of operating system) has failed.In the present invention, target side finds that server 30 is not god.In the present invention, successfully make target side discovery server get back to the original position that service only is provided.Client waits in expectation can be by the environment of oneself controlling.

6. can start (small start) on a small scale.Just can implement as long as be enclosed in the group.

7. in the present invention, find server, do not need change in principle for target side.

8. in the present invention, can directly not utilize existing communication node to solve problem to sending the sources traffic node with not carrying out any change.

9. current as target side and found communication node need not to know in advance the employed communication node of recipient next time.Target side is found that server also is same.

(summary)

The recipient makes the desirable communication node of recipient receive from the communication that sends the sources traffic node as the destination.

Be used to realize that the concrete thought of this situation is as follows.

1. make the method for communicating of the employed communication node reception of recipient as being used to, by the discovery procedure of controlled target side, so that find the desirable communication node of recipient from other people.

2. the recipient is in scope that moves or desirable scope, will want as target side and found communication node becomes one group and as the communication node group that can be used as first communication node 10.This group can be disperseed geographically with on the address.

3. in the communication node group that can be used as first communication node 10, between each communication node, can produce to capture mutually and can be used as target side and the competitive relation of found position.

At this moment, from the net characteristic, for as target side at the undiscovered communication node of this time point, other communication nodes also can't be found such communication node.Communication node in the communication node group that can be used as first communication node 10 is no exception.

According to unique can found communication node, with the result who communicates by letter between same time point can not found communication node, adjust above-mentioned competitive relation.

That is, in the spontaneous behavior of each communication node of following execution (implement).

According to the external environment condition that the external environment condition test section is detected, the situation of switching controls target side discovery procedure and situation about not controlling.

Description of drawings

Fig. 1 is the net entire block diagram;

Fig. 2 is the block diagram that can be used as the communication node of first communication node 10;

Fig. 3 is the flow chart of action that expression can be used as the communication node of first communication node 10;

Fig. 4 is the block diagram of the communication node that can be used as first communication node 10 that relates to of embodiment two;

Fig. 5 is the flow chart of the action of the communication node that can be used as first communication node 10 that relates to of expression embodiment two;

Fig. 6 is the flow chart of expression when keeping;

Fig. 7 be expression first communication node 10 how will be from the transition activities of address of node the flow chart to trigger;

Fig. 8 is the flow chart of the action of the communication node that can be used as first communication node 10 after expression is out of shape embodiment one;

Fig. 9 is that the expression target side is found server 30, be can be used as the sequential chart of transition of the state of the PC11 of communication node of first communication node 10 and automobile 13;

Figure 10 is the flow chart of the action of expression when can be used as the starting of communication node of first communication node 10;

Figure 11 is the block diagram of the communication node that can be used as first communication node 10 that relates to of expression application examples;

Figure 12 is the flow chart of the action of the communication node that can be used as first communication node 10 that relates to of expression application examples;

Figure 13 is the figure of expression practical application.

Among the figure: 10-first communication node, 20-second communication node, the 30-target side is found server, the 40-net, the 110-storage device, 120-operation control part, 130-external environment condition test section, the 150-switching part, 170-renewal portion, 190-communication interface, 110-storage device, 111-static identifier storage part, the address storage part of 112-(target side is found shown in the server) first communication node, 113-distributes the current address storage part, 114-starting option storage part, the 119-operating area, the 120-operation control part, 121-initial actuating determination section, 129-timer, 130-external environment condition test section, 131-address acquisition unit, 132-detection unit, 133-marking signal handling part, 134-replys the challenge signal handling part, 135-attainability confirmation unit.

Embodiment

Below, with reference to the accompanying drawings, the present invention will be described.In addition, in each accompanying drawing, to having the position mark same-sign of said function.Embodiment shown below is and unrestricted example of the present invention.

In addition, when the application applies for, be in the Japanese publication based on same Applicant, identical inventor of undocumented situation, the special 2005-308093 of hope and the special 2006-134591 of hope, be included in the real desire specification by reference.

(net entire block diagram)

Fig. 1 is the block diagram of the net integral body among expression the present invention.In Fig. 1, the target side of having represented first communication node 10, second communication node 20 and having returned the address of (or acting on behalf of intermediary) first communication node 10 according to the inquiry from communication node finds that server 30 is by nets such as internet 40 interconnective states.

(term)

Presentation target side information is meant the information that is illustrated in the target side of being recognized in the former transmission of target approach side's discovery procedure source.Static identifier is the example of presentation target side information (below, be called for short " presentation target side ").

Purpose language when static identifier is the target side discovery.Be generally used for the sender and specify target side communication node on the net.As the concrete example of static identifier, comprise handle (handle) name, main body (body) name, host name, telephone number, URI etc.

Therefore, the identifier in advance notified for the transmission source of the recipient of first communication node 10 is exactly the typical case of static identifier.For example, wish the people that the other side makes a phone call, the situation of telephone number of informing the other side oneself is just corresponding to this.

Realistic objective side's information (below, be called for short " realistic objective side "), be meant the information that net uses in order to specify the employed communication node of recipient.The address is the typical case of realistic objective side.

The address be meant grasp to the online address of the visit of the reality of communication node (=NetworkAddress).

Address in this case is meant that grasp finishes the target side of back to the arrival of the communication node of the initial recognizable reality in transmission source from the target side discovery.In addition, the situation till connecting etc. by the situation of acting on behalf of intermediary's connection or to net, second communication node 20 can not known the address of first communication node 10.In this case, also can think and find by connecting.Realistic objective side may not be the address, can be the information of the base station area of expression first communication node 10, can also be the information that is made of a plurality of parameters.

Presentation target side and realistic objective side all are the information of identification first communication node 10.

But also can there be the situation based on identical expression system in presentation target side and realistic objective side.

For example, having the presentation target side is that telephone number, realistic objective side also are the situations of telephone number etc.The situation of IP address too.Therefore, there is the situation that belongs to the presentation target side in the address.Under these circumstances, allowing presentation target side and realistic objective side is the situation of identical value.

Target side finds that server 30 is used for keeping mapping.The content of mapping generally is presentation target side and realistic objective side, but also can be average information.For example, the character string rewriting rule among the ENUM is the example of average information.

Target side discovery server 30 is functionally announced the mapping of this maintenance, or act on behalf of intermediary and finish (the second communication node 20 and first communication node 10) based on mapping and be connected, but these functions are not target side finds that server 30 is necessary, also has situation about being replaced by net.Target side finds that server 30 can be the system that is made of a plurality of servers.

Target side finds that server 30 does not need change in principle, just can be applicable to communication system of the present invention.

But, for example, the information of individual identification etc. is carried out in 30 settings in advance of target side discovery server to communication node, it is the type of not accepting from the more new demand of different communication node such as the communication node that relates to this information etc., only guarantee to have situation of body part communication node one by one etc. in the information of this individual identification, can't directly apply to communication system of the present invention.

Under these circumstances, change target side and find server 30, make the more new demand of its acceptance from two above communication nodes, this is to invent new target side to find server 30 in order to be applied to the present invention, is equivalent to enforcement of the present invention.

Second communication node 20 is meant the employed communication node of promoter that hope begins to communicate by letter.Be to send the sources traffic node.

The target side discovery procedure that second communication node 20 carries out comprises: target side is found the above-mentioned mapping of server 30 bulletins, the situation of second communication node 20 direct references; Find the situation of server 30 in reference object side vicariously by net; Target side finds that server 30 is connected the situation of carrying out intermediary's (with the target side of IMPP server as presentation, and existence is hidden in the situation of the real target side in this target side etc.) to (second communication node 20 with first communication node 10); Till connecting, net acts on behalf of the situation of intermediary's (comprising that the situation of cellular phone and the middle local agent (Home Agent) of IP mobility (mobility) intercept in situation one this situation of (intercept), exist and do not consider the situation that the transmission source is forwarded) etc.Use any target side of carrying out wherein to find, depend on the kind of target side discovery server 30.

In addition, the also deployable one-tenth multistage of target side discovery procedure.And, can be the mapping in arbitrary stage.

First communication node 10 is meant the found communication node by presentation target side (for example, at communication beginning time point, the sender specifies the static identifier as communication counterpart).Can think to connect and be contained in the discovery.This be because: even when second communication node 20 is connected under the situation of the address of not knowing first communication node 10 etc., according to realizing two internodal connections (by intermediary etc.), the result equates with found situation.That is, first communication node 10 is the target side from the transmission source.

In addition, to first communication node 10 or second communication node 20 any, all pay no attention to the classification of communication node.For example, not only comprise mobile phone (situation that only comprises SIM card), PC, PDA etc. in the communication node, also can comprise automobile such as automobile navigation carry product and with the joint product of automobile etc.And, the classification and the relation of the net under also paying no attention to.In this manual, only under the situation as communication node, refer to the device that the user uses.That is the device that does not comprise network operator and used.Generally, this is called end node (edge node) or terminal point (end point).In addition, be positioned at the situation of fire compartment wall inboard etc. at first communication node 10, also comprise the situation of transmitting arrival such as (forward) and connecting by port from network boundary.

The initiation that the recipient of first communication node 10 carries out is meant in the communication node that will find as target side, carries out the decision (selection of findable communication node) which finds second communication node 20.This initiation not only is the initiation of expressing, and can also be based on the non-initiation of expressing of automation etc.Under the situation of the initiation of expressing, comprise making communication node not be present in situation online and that it is not found as target side.

In the behind of first communication node 10, there is current undiscovered but found in the future communication node (11 among Fig. 1,12,1N) as target side.

Such communication node generally is the common communication node that can only post a letter, i.e. the communication node that can not receive equally with public telephone or browsing terminal.This " employed terminal of general recipient after the network commercialization " with " background technology " middle explanation is same.

On the other hand, are single communication nodes from second communication node 20, the first communication nodes 10.Second communication node 20 can't be known the communication node of the behind that is positioned at first communication node 10.And second communication node 20 does not carry out individual identification to first communication node 10 usually.That is, first communication node 10 replaces to its communication node behind, and generally speaking, second communication node 20 can't be known.Concerning second communication node 20, first communication node 10 is found communication node.Therefore, the result who communicates by letter of the owner of second communication node 20 and first communication node 10 accepts undesirable response sometimes.For example, although expecting that display web page does not show.But this is allowed to.Even this only is because the recipient of first communication node 10 possesses the webserver mostly as the findable predetermined communication node of target side, comprise also that in group the communication node situation that do not possess the webserver causes.

At this, in constituting the communication node group of first communication node 10, only there is current found communication node and do not exist under the situation of current undiscovered communication node, if consider the situation of the address change of first communication node 10.At this moment, at the control period that first communication node 10 does not carry out the target side discovery procedure, the target side that second communication node 20 carries out is found failure.That is, arrive wrong target side.But however, first communication node 10 still exists as communication node.Therefore, being found as target side and having first communication node 10 or its communication node behind is other situations.

First communication node 10 plays from the employed physical node of identical recipient (for example PC11, PC12, automobile 13 etc.) as target side and found effect.

Therefore, in this manual, carry out following processing.

First communication node 10 is meant that current found communication node (wherein, exists by found situation of the communication node of misidentification and the non-existent situation of found communication node.Under these circumstances, whether correct viewpoint is considered as first communication node 10 from found communication node).

There is current undiscovered communication node more than 0 in behind at first communication node 10.

Under notion of not distinguishing current found communication node and current undiscovered communication node and comprising and the situation that is considered as single communication node, be made as the communication node that can be used as first communication node 10.Can be used as the communication node of first communication node 10, on geographical and address, all disperse also harmless.

Group is the set that can be used as the communication node of first communication node 10.Here said group is meant in the logistics said the sort ofly, is promptly concluded and give the set of title by public feature.Wherein, constituting the quantity of the individuality of this set can be more than one.Therefore, group is made of an above communication node.

Below, the communication node that can be used as first communication node 10 is described.

(embodiment one)

The state of the standard in the control of target side discovery procedure is meant the first single communication node 10 controlled target sides discovery procedure.This also exists in the prior embodiment.

At this, the control of target side discovery procedure is meant by the mapping (for example, the target side of the reality that is associated with the presentation target side) of target side being found storage in the server 30 to guarantee to be up-to-date and correct information, makes and can not find wrong target side.Be specially and carry out renewal described later.

At this, considered that group is a situation about being made of a plurality of communication nodes.

In group is under the situation about being made of a plurality of communication nodes, can compete.

Therefore, for the initiation with the recipient is reflected in the net, below explanation is used for the spontaneous action that each communication node is coordinated.

Fig. 2 is that expression can be used as the block diagram that the inside of the communication node of first communication node 10 shown in Figure 1 constitutes.In Fig. 2, represented the physical communication interface 190 that is used for storage device 110, external environment condition test section 130, switching part 150, the renewal portion 170 that to comprise the temporary transient storage that operation is used and is used for being connected with net 40.

Storage device 110 comprises static identifier storage part 111 and operating area 119.

Static identifier storage part 111, the example of employed presentation target side when finding first communication node 10 and store static identifier as second communication node 20.

Operating area 119 is used for the temporary transient storage that operation is used.In addition, for operating area 119, in following not explanation one by one.

External environment condition test section 130 plays the effect as transducer, is equivalent to receiving vessel.

That is, external environment condition test section 130 detects the state of encirclement from the net at the external environment condition place of node.

(detection content)

External environment condition test section 130 utilizes the content of storage in the static identifier storage part 111, detects the position from node in the net.(term that is called address and position, online address and the position of expression under the situation of not prenoticing especially.) this be because: since the net change, also can the ground change of (along with the change of net) passivity from the position of node.

In addition, determine from node whether is first communication node 10, depend on as be stored in target side find in the server 30, with the related realistic objective side's (or average information) of a certain presentation target side foundation, what is that mapping keeps with.

Even the individual communication node on the whole is one of inscape from net, concerning the individual communication node, net itself also is an external environment condition.

Below, expression needs three types of the external environment condition of detection.

(1) whether be first communication node 10 from node, or

(2) outside node, whether be first communication node 10, or

(3) there is not first communication node 10.

(operation)

The effect as the part of operation is played by renewal portion 170, is equivalent to effector.

The content of operation is to apply effect to external environment condition.Apply effect to external environment condition, particularly, be meant the discovery procedure of controlled target side.

More specifically, the control of target side discovery procedure, be meant by upgrading target side directly or indirectly and find server 30 be controlled at the communication node that can be used as first communication node 10 is interior to make second communication node 20 find for which communication node as first communication node 10.

Upgrade and (be also referred to as registration.Or also be called refresh, logon etc.), be meant that 10 pairs of target side of first communication node find that server 30 sends the order (update command) of group that indication rewrites the value of mapped (being also referred to as binding etc.).This order might be indirect.Generally, need authentication in the renewal.Comprise " location registers " in the renewal.In a broad sense, comprise that 30 transmissions of 10 pairs of target side send servers of first communication node only are used to keep the right order (for example, keep-alive (keep alive)) of mapping etc.(for two examples that upgrade indirectly.For example, in IP Mobility, exist mobile node to upgrade Foreign Agent (foreign agent), Foreign Agent upgrades the situation of local agent etc.Local agent is equivalent to target side and finds server 30.For example, in cellular phone, in communication node cross-location registration zone and under the mobile situation,, comprise that then net carries out more news etc. to HLR if to carrying out location registers in the base station.The position that is called cellular phone also is the position on the route (routing) in the net when being the position of physics.Certainly indirect renewal is also included within the renewal).

Method for updating finds that because of target side the kind of server 30 is different.

Under plural situation, there is current undiscovered communication node at the communication node that can be used as first communication node 10.At this moment, current undiscovered communication node is by upgrading, can be with as target side and found communication node turns to (turn to) from node (that is still undiscovered communication node before upgrading).

(content of coordination)

The scope that circle surrounded by comprising first communication node 10 among Fig. 1 is a group.The control which communication node in the group is obtained the target side discovery procedure is coordinated.

The result who coordinates, each communication node that can be used as first communication node 10 is not at war with as a whole, becomes a circle, provides correct target side discovery procedure to second communication node 20.

Basic thought is, spontaneously moves by each communication node that can be used as first communication node 10, realizes above-mentioned coordination.

Coordination is carried out between communication node, and to this, carry out spontaneous inside at communication node.Spontaneous is the installation that is used to coordinate.

(spontaneous content)

Spontaneously be meant that the function that applies effect in the mode of keeping correct state is a shape constancy.

At this, correct state does not have the correct state that obtains separately from node etc. (if there is such state, do not become problem at this yet), be meant the state that recipient's initiation (that is the decision which communication node is found as target side) is reflected.

What realize shape constancy is feedback.

In the present invention, system is two systems.

First system finds that by second communication node 20, target side the server 30 and first communication node 10 constitute.

Second system by target side find server 30 and the single or multiple communication node that can be used as first communication node 10 (that is, have at least current found communication node and may exist or may non-existent current undiscovered communication node) constitute.That is, second system has added target side discovery server 30 to group and has constituted.

The different beneficiary's differences that are of the maximum of first system and second system.

First system is the system for the initiator of initiating to communicate by letter.This is existing pattern.

Second system is proposed by the present invention, is the system that is used to reflect recipient's initiation.And then second system constitutes feedback control loop.

Feedback has two, and one is that this is a feedback control loop as the coordination that applies the result of effect to external environment condition.And another is spontaneous.

That is, having that the result that external environment condition is detected is reflected to is spontaneous from the feedback of the action of node.

Spontaneous based on stimulating (being also referred to as acceptance) and reaction pattern.

The detection of the external environment condition that external environment condition test section 130 is carried out is as stimulation, and renewal portion 170 is called the reaction to the effect that applies of external environment condition.At this moment, switching part 150 is judged the detection content, determines whether to make 170 reactions of renewal portion.

Switching part 150 is judged branch transition (branch) based on the testing result of external environment condition test section.

The result of branch transition, the unlatching/shutoff of 150 pairs of renewal portions 170 of switching part is switched.

The notion of switching can think selectively to carry out to express (express) action to the starting of renewal portion 170, connection, transmission (delivery), calling etc.

Therefore, switching part 150 is also similarly controlled with renewal portion 170.Renewal portion 170 is that with the difference of switching part 150 renewal portion 170 is used for applying effect (that is, the discovery procedure of controlled target side) to external environment condition, and to this, switching part 150 is used to control the action from node.

That is, switching part 150 is realized spontaneous.

(control)

Control is the notion of the logicality used in order to adjust competitive relation.

Control is meant which communication node in the communication node that can be used as first communication node 10 has the right of effect that the net external environment condition of communication node (that is, from) is applied.

That is, judge whether each communication node is to being possessed of control power from node.

In table 1, represent concrete example.

Table 1

		There are not (3) in first communication node 10	First communication node 10 exists
			First communication node 10 exists		First communication node 10 is from node (1)	First communication node 10 is not from node (2)
			The communication node that is possessed of control power		First communication node 10 is from node (1)	First communication node 10 is not from node (2)	The communication node that is possessed of control power does not exist	From node	First communication node of this time point is possessed of control power
The control limit of each communication node		(from above-mentioned transformation) has all communication nodes of formation group	The communication node that is possessed of control power		Be possessed of control power from node	First communication node 10 (not being the communication node from node) has		From node
The control limit of each communication node			To control from the target side discovery procedure of node		Be possessed of control power from node		Do not have control at this time point, but can guide into from node	Exist	No
Reaction	Apply effect to external environment condition	Can carry out (annotating 1)	To control from the target side discovery procedure of node		Carry out	Do not carry out		Exist	No
	Apply effect to external environment condition	Can carry out (annotating 1)	The control of carrying out from node	Upgrade	Carry out	Do not carry out	Upgrading (annotating 2) keeps	Do not upgrade (annotating 3)

For the notes in the table 11,, therefore as a result of, spontaneously control from node owing to there be not the key element of obstruction from the discovery procedure of node control target side.

For annotating 2, " renewal " and " keeping (maintain) " can think identical meanings at this.This be because: under the situation of " first communication node 10 is from node ", even further upgrade, from second communication node 20, also without any variation.Detailed content is narrated in the back.

For annotating 3, as control from node, the control of not upgrading.That is, do not apply effect or become laissez-faire state to external environment condition.

,, therefore must upgrade in the past, but the unnecessary implication of upgrading be arranged at this because single communication node is used as prerequisite.

Like this, switching part 150 judges from node whether have control to the target side discovery procedure, under situation about being possessed of control power, carry out the control always of " renewal " from node, under situation about not being possessed of control power, carry out the control that proposes first by the present invention of " not upgrading " from node.

Control from node belongs to spontaneous, and the control of target side discovery procedure belongs to coordination.The purpose of the control of target side discovery procedure also is this.

Therefore, the content that switching part 150 needs to judge is, except that whether there is first communication node 10 from node.

For example, except that under the situation that has first communication node 10 node, there is not control from node.Therefore, do not upgrade from node.

At this moment, the communication node that is possessed of control power is first communication node 10 (not being from node) as current found communication node.

Like this, each communication node is coordinated by spontaneously moving to be used as organizing.

(flow chart)

Fig. 3 represents to can be used as the flow chart of the communication node of first communication node 10.

In step S202, external environment condition test section 130 detects from the external environment condition of the communication node that respectively can be used as first communication node 10.

In step S204,, judge branch transition to whether switching based on the testing result of step S202.That is, switching part 150 judges from node whether have control to the target side discovery procedure.

As the testing result of the step S202 of trigger (trigger) for such as already explained, whether " except that from node, there being first communication node 10 ".

The flow chart of Fig. 3 is the flow chart that the current found communication node in the communication node that can be used as first communication node 10 and current undiscovered communication node are all similarly implemented.For example, point at a time, first communication node 10 is (promptly, current found communication node) under the situation about constituting by PC12, detect at PC11 under the situation of external environment condition,, therefore detect " except that from node, there being first communication node 10 " owing to being PC11 from node.Otherwise under the situation of implementing to detect at PC12, because PC12 is first communication node 10, therefore detecting first communication node 10 is from node.

For example, even manually, also can find the target side discovery procedure that server 30 is provided in controlled target side.The control of the target side discovery procedure of manually carrying out, be used to reflect initiation that the recipient carries out express one of method.

At this, the control of the target side discovery procedure of carrying out automatically is meant the variation of following the tracks of the address, upgrades target side directly or indirectly and finds server 30 (below, be called " upgrading automatically ").

only carry out more even the address changes during the stand-by period, when upgrading, also can reflecting the variation of address under the news at a certain time interval next time, therefore comprise the variation of following the tracks of the address.

The control of the target side discovery procedure of manually carrying out is meant that initiation based on the sender comes controlled target side's discovery procedure (below, be called " manually upgrading ").

Therefore owing to what carry out based on sender's initiation is manual renewal, and the initial renewal when having started existing automatic refresh routine is included in the manual renewal.Therefore, when starting, start under the situation of the communication node that the mode of automatic refresh routine sets, initiate, therefore in this case, upgrade the initial first time and also be equivalent to manual renewal since in starting, exist according to communication node.

But, be not that manual renewal gets final product.Even there is the communication node (below, claim " automatically more new node ") of that existed, a variation and the discovery procedure of controlled target side of following the tracks of the address in group in the past, the control of the target side discovery procedure of then manually carrying out is just by more new node rewriting automatically.Exist under the situation of a plurality of automatic more new nodes, rewrite mutually.That is, in existing automatic renewal, the problem that existence can't be coordinated.Therefore, as long as make the communication node that respectively can be used as first communication node 10 following spontaneous.

In step S204, the testing result of the external environment condition of carrying out based on external environment condition test section 130, switching part 150 is judged branch transition.

Under the situation that detects " except that there is first communication node 10 (that is, current found communication node) from node ", branch transition is to step S210.Otherwise enter step S206.

In step S206, switching part 150 is opened renewal portion 170.

In step S208, renewal portion 170 upgrades target side directly or indirectly and finds server 30.That is, communication node carries out the effect that applies to external environment condition.Be under the situation of first communication node 10 from node, by upgrading, keeping the target side of being found from second communication node 20 is from node.Under the situation that does not have first communication node 10,, target side is turned to from node by upgrading.

In step S210, switching part 150 turn-offs renewal portion 170.

Step S212 is a step of expressing the logicality of not upgrading.That is, under the situation of not carrying out to the effect that applies of external environment condition.Be characterised in that, may not carry out in the past the renewal that (when for example, changing from the address of node) must carry out.In this case, should be by the first communication node 10 controlled target sides discovery procedure except that existence from node.Except that the important reason of the detection that has first communication node 10 from node just is this.At this, if current undiscovered communication node upgrades, then recipient's initiation is not reflected in the net.That is, more new node seizes the control of target side discovery procedure from first communication node 10 automatically, and then the target side confusion that second communication node 20 is found.

But, new node more automatically when only having first communication node 10, when the communication node that can be used as first communication node 10 all has only one, as long as the not detection of the external environment condition that need carry out in step S202 and the branch transition of carrying out in step S204 are direct implementation step S208.

But, exist a plurality of communication nodes that can be used as first communication node 10 the time, under situation, can compete according to the direct implementation step S208 of each communication node in the past.

The invention is characterized in, " renewal " carried out among the step S208 is not to carry out all the time, according to the external environment condition (step S202) that detects, optionally switch (step S204, S206, S210), external environment condition is applied effect (step S208 or step S212).

Target side finds that there is the situation of a plurality of realistic objective sides (or average information) corresponding with certain presentation target side of storage in server 30.

(to the correspondence of priority)

Find in the server 30 in target side, exist above-mentioned each mapping also to set up related situation with precedence information.

At this moment, the renewal that the mapping that has from the limit priority to the low priority is carried out is called the renewal of preparation.Why being called the renewal of preparation, is that then the later mapping of next grade is left in the basket because the pairing realistic objective of a highest wisdom limit priority can correctly be communicated by letter.Therefore, in step S212, not more under the news, also can comprise the renewal for preparing.

(to the correspondence of task identifier)

But also there is following situation: replace (/ with) precedence information, the classification of the application program of using in the formal communication of carrying out after target side is found (being also referred to as service etc.) is related with each mapping foundation, and finds server 30 storages by target side.Under these circumstances, also can upgrade with application program unit.

(detection method of external environment condition)

In order to detect except that from node, whether there being first communication node 10, stand in the position identical as long as can be used as each communication node of first communication node 10 with second communication node 20, copy common target side discovery procedure to get final product.That is, in first system and second system, the method that target side is found is identical.

Comprising the pairing target side discovery of kind, the detection of external environment condition, the renewal of target side discovery server 30, is that the communication node that can be used as first communication node 10 should be installed.

Provide in existence under the situation of the structure that state presents (presence), same with the second communication node, the communication node that can be used as first communication node 10 can believe that also this state presents.Otherwise attempt connecting.

In embodiment two, be illustrated in the concrete example of the situation of having used the attainability affirmation in the time that the address can being known.

(embodiment two)

Fig. 4 is that expression can be used as the block diagram that the inside of the communication node of first communication node 10 shown in Figure 1 constitutes.In Fig. 4, storage device 110, external environment condition test section 130, switching part 150 and the renewal portion 170 that has represented to be used for to comprise the temporary transient storage that operation is used is connected to the communication interface 190 of the physics of net 40.

Storage device 110 comprises address storage part 112, distribution current address storage part 113 and the operating area 119 of static identifier storage part 111, first communication node 10.

The address storage part 112 of first communication node 10, the storing queries target side is found the address of first communication node 10 that the result of server 30 is known.That is, be used to store the address that target side is found first communication node 10 shown in the server 30.

Distribute current address storage part 113 to be used for memory allocation to address from node (or selvage circle that is connected with extranets).

Operating area 119 is used for the temporary transient storage that operation is used.

External environment condition test section 130 possesses: address acquisition unit 131, and it obtains the address of first communication node of being stored in the target side discovery server 30 10; Detection unit 132, its judge the address that obtained by address acquisition unit 131 with distribute to whether consistent from the address of node; Marking signal handling part 133, it generates mark and sends or receive marking signal each address that is obtained by address acquisition unit 131; Reply password (countersign) signal processing part 134, challenge signal is replied in its reception, perhaps when receiving from marking signal that other communication nodes send, generates and replys challenge signal and return; With attainability confirmation unit 135, whether the challenge signal of replying that its judgement is returned is to have arrived desirable communication node by above-mentioned marking signal to generate.

Switching part 150 is judged branch transition based on the testing result of external environment condition test section 130.

The result of 150 pairs of branch transition of switching part, the unlatching/shutoff of renewal portion 170 are switched.

Renewal portion 170 upgrades target side directly or indirectly and finds server 30.

Fig. 5 represents to can be used as the flow chart of summary of action of the communication node of first communication node 10 shown in Figure 4.

Can comprise in step S402: the communication node that can be used as first communication node 10 is found server 30 or net inquiry to target side, or target side is found that server 30 or net request are connected to the step of first communication node 10; Know realistic objective side or do not knowing to attempt step of connecting under the state of realistic objective side with the response of finding server 30 or net from target side.Embodiment two is the situations that can know the address, and is therefore as described below.

Step S402 is following steps: acquisition unit 131 query aim sides in address find server 30, obtain the address at this time point of the realistic objective side that the presentation target side used when finding target side with the recipient is associated from its result.Certainly pay no attention to the classification of physical layer.In addition, the address that obtains is stored in the address storage part 112 of first communication node 10 in advance.

Step S404 is following steps: in the address storage part 112 of 132 pairs first communication nodes 10 of detection unit the target side of storage find first communication node 10 shown in the server 30 the address, with distribute current address storage part 113 in store distribute to from the current address of node (or selvage circle that is connected with extranets) and whether consistently to judge.At this, if unanimity then is first communication node 10 from node.In this case, branch transition is to step S420.If the inconsistent step S406 that then enters into.

In step S406, read address stored in the address storage part 112 of first communication node 10, marking signal handling part 133 sends marking signal to this each address.

In step S408, reply challenge signal handling part 134 and receive the challenge signal of replying for the marking signal of above-mentioned transmission.In addition, reply challenge signal and have situation about not responded.

In step S410, attainability confirmation unit 135 is replied challenge signal (or reply challenge signal by not receiving) by above-mentioned reception, and the true and false of attainability is judged.In addition, first communication node 10 is made as when receiving marking signal and is received by marking signal handling part 133, replys challenge signal handling part 134 and replys challenge signal for well.At this, the result who confirms in attainability is under the genuine situation, and branch transition enters into step S412 to step S406 under for false situation.(confirm about attainability, wish) with reference to WO2004/059925

In step S412, switching part 150 is opened renewal portion 170.

In step S414, renewal portion 170 upgrades target side and finds server 30.That is, communication node carries out the effect that applies to external environment condition.Because this situation is the situation of " not having first communication node 10 ", therefore, target side is turned to from node by upgrading.

In step S416, switching part 150 turn-offs renewal portion 170.

Step S418 is a step of expressing the logicality of not upgrading.That is,, therefore do not carry out the effect that applies to external environment condition owing to be the situation of " except that first communication node 10 that from node, exists ".Be characterised in that, may not carry out the control of the target side discovery procedure that in the past must carry out.

Step S402～step S404 is used to judge whether " target side finds that the address shown in the server 30 is with consistent from the address of node ".

Step S406～step S410 is used to judge whether existed first communication node 10.

In the present embodiment, as about whether existing the method for the detection of first communication node to use the attainability affirmation, can realize too but present detection, authentication, individual identification etc. by state.Because these are technology of knowing, be positioned at the degree that can relate to easily below therefore.

Find that in target side server 30 (or state showing server) provides under the situation that state presents, but also detected state presents.Be current at detected state, also can carry out to the interim participation of target side discovery procedure etc.Presenting by detected state, even judging whether to exist first communication node 10, do not judge also whether it is under the situation of node, is useful to the interim participation of target side discovery procedure.In addition, present for state, be with in the past difference, do not need the detailed state information to first communication node 10, it is promptly enough only to detect on-line.

In addition, when attempting actual connection, except that the attainability that has illustrated is confirmed, also can be undertaken by authentication.Employed authentication was not identical authentication when this can not hinder with the control of carrying out the target side discovery procedure.It can certainly be different verification process.

In addition, also the recipient can be registered in the communication node that can be used as first communication node 10 in advance to the information of wanting found communication node to carry out individual identification as target side, judge by the consistent of this registration.Thus, even when under not knowing the situation of address, attempt connecting, also can detect external environment condition.

Step by the step S402～step S410 of above explanation detects external environment condition.With this as stimulation.

Step S412～step S420 represents the reaction to detected stimulation.

In step S412～step S414, renewal portion 170 applies effect by upgrading to external environment condition.

In step S416～step S418,, external environment condition is applied negative effect (in other words, external environment condition not being applied effect) by not upgrading.

In step S420, the target side of only maintaining the statusquo is found.

(keeping)

In embodiment one, " renewal " handled as identical process with " keeping ", consider respectively at this.

Below expression illustrates in greater detail the table of notes 2 parts in the table 1.

Table 2

		First communication node 10 exists
		First communication node 10 exists	First communication node 10 is from node
		The control of carrying out from node	First communication node 10 is from node	Reaction when changing from the address of node	Upgrade (annotating 5)
Reaction when not changing from the address of node	Do not carry out any processing in principle, then send alive signals (=keep) (annotating 4) if desired			Reaction when changing from the address of node	Upgrade (annotating 5)

As known from Table 2, be first communication node 10 from node, and be " keeping " in the reaction of under the also unchanged situation in address of node, carrying out.

" keep " also and can regard as and " do not carry out any processing in principle.If need then send keep-alive ".

For the notes in the table 24, utilize Fig. 6 to describe.

Fig. 6 is the flow chart of expression when keeping.It is the internal actions of step S420.

In step S602, target side is found whether server 30 is to need the type of keep-alive to judge.Be to need under the situation of type of keep-alive, branch transition is to step S608.Under unwanted situation, enter into step S604.

In step S604, switching part 150 turn-offs or opens renewal portion 170.

In step S606,, do not carry out any processing (not upgrading in other words) or yet renewable in principle according to step S604.That is, under the situation that does not need keep-alive, upgrade or not more new capital be same.This be because: at the communication node that second communication node 20 is found is under the also unchanged situation of node and address, though further upgrade, the target side discovery procedure is also without any variation.

In step S608, switching part 150 is opened renewal portion 170 expediently.

In step S610,170 pairs of target side of renewal portion find that server 30 sends alive signals.

At this, the reason that can carry out expediently is that keep-alive is more with the situation that renewal is distinguished in the prior art, is actually identical action.Therefore, in this explanation, the keep-alive sending part is not set yet, and substitutes with renewal portion 170.In addition, also the keep-alive sending part can be set certainly.

Usually, before target side is found, target side is found that server 30 needs the server of keep-alive or do not need the server of keep-alive to judge.Fig. 6 only is used to express the comparative descriptions target side and finds that server 30 is to need the server of keep-alive and is not the situation that needs the server of keep-alive.When mounted, branch transition not in step S602, and find that according to target side the classification of server 30 is installed as (because after all the concrete method difference of upgrading).

By above narration, the situation of " keeping " has been described.

The situation that " keeping " and " renewal " are not distinguished clearly also is illustrated.But, originally do not really want the target side discovery procedure is maintained present situation, and wish only to upgrade the change of expressing of the associated realistic objective side of presentation target side.For example, first communication node of being found at second communication node 20 10 does not change, but under the situation that the address of first communication node 10 has taken place to change, target side discovery procedure (at least) can be cannot see for the time being.Under these circumstances, be to make the target side discovery procedure turn back to situation of first communication node 10 that the recipient wishes etc.Below, the situation of " renewal " that do not comprise " keeping " is described.

(address change)

The situation of the notes 5 in the table 2.That is, be meant that from node be first communication node 10, situation about also changing from the address of node in addition.This is the more news that is equivalent in the past.

As in the past, under first communication node 10 is single situation, when changing, as long as directly renewal from the address of node.

As the changing from the address of node of first communication node 10 time, the target side discovery can be cannot see for the time being.

Therefore, detecting (3) does not exist the situation of first communication node 10 to get final product.

In Fig. 7, represent that first communication node 10 how will be from the transition activities of address of node to trigger.In Fig. 7, PC11 is first communication node 10 that the recipient is intended to, and former PC11 is first communication node 10 of finding the realistic objective side that server 30 is stored as target side.

In step S802, PC11 inquires about target side discovery server 30 with the presentation target side.

In step S804,, obtain the address of first communication node 10 of this time point from the response of target side discovery server 30.But owing to be first communication node 10 and from the address of node variation taken place from node, therefore target side finds that server 30 before address change, can return and distribute to from the address of node in step S804 certainly.Being equivalent to detect in the step S404 of Fig. 5 from node is not the situation of first communication node 10.

In step S806, communication is attempted in each address (that is raw address) that obtains among the step S804.

In step S808, do not reply certainly.In addition, at this moment, also cannot see from second communication node 20, the first communication nodes 10.(raw address is so far from the address that node was using, and from node address variation has taken place, and therefore using the communication node of this address is non-existent in principle).

In step S810,, therefore be judged as first communication node 10 and do not exist owing in step S808, do not return.That is, detect and using the communication node of this address not exist.Perhaps, using the situation of this address, also can use attainability to confirm in order also to detect irrelevant communication node.

In step S812, switching part 150 is opened renewal portion 170.The renewal (the step S414 of Fig. 5) of address change has been reflected in renewal portion 170.Thus, continue as first communication node 10 from node.

In embodiment two, the concrete example of outside environment measuring, situation about keeping, address change are illustrated.

According to the above, essence of the present invention is, the detection of external environment condition as stimulation, to the direct situation of transmission update command when upgrading automatically in the past, has been generated more news and news more not according to external environment condition.

That is, being characterised in that, is to come the communication node of controlled target side's discovery procedure according to the detected external environment condition of external environment condition detection method.

(variation)

Such according to what illustrated, find that in target side server 30 does not need under the situation of keep-alive, can not upgrade when not changing in the address of first communication node 10 yet.Can not upgrade owing to both renewable yet, therefore wish not upgrade.

But,, also can exist the target side that does not stop (expire) to find server 30 although need keep-alive.In this case, think and do not need the situation of keep-alive same.

If this is reflected in the situation of embodiment two, then from node be the unchanged situation of first communication node 10 and address (S606 of Fig. 6) and except that the situation that from node, has first communication node 10 (S418 of Fig. 5), all will not upgrade, therefore, just do not upgrade as long as detect under the situation that has first communication node 10.Therefore, under the situation that does not need keep-alive, need not to know that from node be first communication node 10, have first communication node 10 (that is, need not difference (1) and (2)) as long as can detect.Under the situation that does not need keep-alive, hope replaces to " not upgrading " with 2 parts of the notes in the table 1 from " keeping ".

In addition, for variation, block diagram is identical with Fig. 2.

In Fig. 8, expression is found flow chart after server 30 is applicable to embodiment one distortion of the situation that does not need keep-alive with target side.

In step S204-2, the testing result of the external environment condition of carrying out based on outside environment measuring portion 130 in step S202, switching part 150 is judged branch transition.That is, switching part 150 judges from node whether have control to the target side discovery procedure.

Detect in step S204-2 under the situation of " having first communication node 10 ", branch transition is to step S210.Otherwise enter into step S206.

In step S206, switching part 150 is opened renewal portion 170.

In step S208, renewal portion 170 upgrades target side directly or indirectly and finds server 30.That is, communication node carries out the effect that applies to external environment condition.Under the situation that does not have first communication node 10,, be directed into from node target side identical with embodiment one by upgrading.Different with embodiment one is to be left out in step S204-2 in the situation that is first communication node 10 from node.That is, there is not situation about keeping.

In step S210, switching part 150 turn-offs renewal portion 170.

Step S212 is a step of expressing the logicality of not upgrading.

It still is that unwanted situation is all applicable that embodiment one needs the situation of keep-alive.

Variation is applicable to the situation that does not need keep-alive.

(whole order)

Fig. 9 is the PC11, automobile 13 of the expression communication node that can be used as first communication node 10 and the sequential chart that target side is found the action between the server 30.

For the action of each communication node, wish with reference to embodiment two.

At the beginning time point of sequential chart, target side finds that the address of first communication node 10 of storage in the server 30 is made as the address (step S1) of automobile 13.

With predetermined timing (timing), PC11 finds that to target side server 30 according to the order that illustrates, carries out the address and obtains processing (step S2, S3) in the step S402 of Fig. 5.

Because target side finds that the address of first communication node 10 of storage in the server 30 is the address of automobile 13, so PC11 will obtain the address of automobile 13.In this case, PC11 be judged to be the address that obtained with from the current address of node inconsistent (the step S404 of Fig. 5), by being that each automobile 13 sends marking signals to each address that obtains, carrying out attainability and confirm (the step S406 of step S4, S5, Fig. 5～S410).

At this moment, as long as faults such as operate as normal do not take place not automobile 13, just can obtain desirable attainability affirmation result.Therefore, be judged as except that also there being first communication node 10 from node, PC11 finds that to target side server 30 does not upgrade (the step S416 of step S6, Fig. 5～S418).

Then, same, in automobile 13 sides, carry out the address and obtain to handle (step S7, S8).But in this case, automobile 13 is judged as the address consistent with the current address from node (the step S404 of Fig. 5) that is obtained, and therefore keeps the target side of this time point and finds (step S9, the step S420 of Fig. 5).Perhaps, also can with this regularly send not shown alive signals (the step S610 of Fig. 6).

Then, the processing that continuation repeats and step S2～S6 is same (step S10～S14).

Then, be made as the incident (step S15) of the address change that automobile 13 has taken place to distribute to.

But target side discovery server 30 is still being stored automobile 13 address in the past.Under this state, even carrying out the address, automobile 13 obtains processing (step S16, S17), automobile 13 also is the address that is obtained from the past of node, and then, to comparing from the address in past of node and current address.Its result is judged as two-address inconsistent (the step S404 of Fig. 5).Therefore, 13 pairs of each addresses from the past of node of automobile are carried out attainability and are confirmed (the step S406 of step S18, S19, Fig. 5～S410).Because automobile 13 has not used address in the past, therefore can not obtain the result that desirable attainability is confirmed.Therefore, automobile 13 carries out target side is found renewal (the step S412 of step S20, S21, Fig. 5～S414) of server 30.

As mentioned above, according to present embodiment, select PC11,12 and automobile 13 in one find and people's redirect communication node and can communicating as target side.

(system)

Below, the integral body of expression communication system.

This system is: be connected with by net: the employed second communication node 20 of promoter that requirement begins to communicate by letter; Employed first communication node 10 of recipient; Find server 40 with target side, wherein store the mapping of presentation target side and realistic objective side, when 20 hope of second communication node communicate with first communication node 10, second communication node 20 is found server 30 or net 40 inquiry presentation target side to target side, or to target side discovery server 30 or net 40 request connections, find server 30 or replying of net 40 and know realistic objective side from target side, or do not knowing to attempt connection under the state of realistic objective side, when target side is the group that is made of the communication node that can be used as first communication node 10 more than, a communication node that can be used as first communication node 10 is found server 30 to target side, to upgrade as the pairing realistic objective side of presentation target side from node, at the communication node that can be used as first communication node 10 is two when above, communication node beyond the above-mentioned communication node, can will not upgrade as the pairing realistic objective side of presentation target side from node, thus, as target side, allow second communication node 20 find the communication node of recipient's appointment.

(application examples)

Expression is with the flow chart after the automation of the present invention in Figure 10.

Figure 10 (1) is used for the contrast that begins with in the past automatic refresh routine.

Below explanation is the example of new automatic renewal.New automatic renewal will continue to attempt upgrading.Starting can be the starting of communication node, also can be to attempt more NEW BEGINNING.

The integral body of embodiment one (that is, step S200) is switched the unlatching/shutoff of renewal portion 170 according to detected external environment condition, and therefore different with automatic renewal in the past, whether the result is updated in is indefinite in advance.According to this feature, the integral body of embodiment one is called " attempting upgrading ".In addition, also the integral body (that is step S400) of embodiment two or the integral body (that is step S200-2) of variation can be changed.

Step S906 is by the process of timer timing stipulated time.At the appointed time after the standby, the trial that circulation is upgraded.Its result, as a whole, with the trial that continues to upgrade.This is the example of new automatic renewal.In addition, find that in target side server 30 needs under the situation of keep-alive, the afore mentioned rules time is subjected to target side to find the restriction of the termination time of server 30.Perhaps, replace step S906, also the detection of always carrying out that changes from the address of node can be implemented the trial of upgrading in trigger.

Different with automatic renewal in the past, as the current undiscovered but found in the future communication node of target side, be not under the situation of first communication node 10 of node existing, even the trial of upgrading when starting also can not seize target side from current found communication node and find.

Thus, even under the situation that the communication node that can be used as first communication node 10 only is made of single communication node (Zu inscape is one a situation in a word), whenever all can add communication node in the behind of first communication node 10.

Add communication node behind to and remain the communication node that can be used as first communication node 10.That is, only add, can not become current found communication node.

And in a single day afterwards, the position of first communication node 10 is kept becoming first communication node 10 (current found communication node).At this moment, current undiscovered communication node can not occupied control that first communication node 10 had originally and the discovery procedure of controlled target side.Just like this, recipient's initiation is reflected in the net.

That is, can make second communication node 20 find to can be used as the communication node that the recipient in the communication node of first communication node 10 wishes.

But, when communication node starts, begin to upgrade automatically always to carry out.In the past, communication node must upgrade with outside haveing nothing to do.In other words, under the situation that has first communication node 10, the communication node of Tian Jiaing can seize as the found position of target side from first communication node 10 afterwards.This is utilized conversely, can be used for the reflection of recipient's initiation.That is, as Figure 10 (2).

In Figure 10 (2), before implementing the trial of upgrading, implement renewal in the past.That is, when starting, force to upgrade.

In order to make communication node carry out such action, can be by realizations such as starting options.Specify the starting of starting option to set (for example, the setting of the action the during power connection of communication node) by preserving in advance, when starting, upgrade forcibly, target side can be found to turn to from node, switch to the enforcement of attempting renewal then.

Block diagram when expression is made as (1) and (2) of changeable enforcement Figure 10 in Figure 11.

Figure 11 is that expression can be used as the block diagram that the inside of the communication node of first communication node 10 shown in Figure 1 constitutes.In Figure 11, block diagram shown in Figure 2 has been increased operation control part 120.In storage device 110, increased starting option storage part 114.

The value of the action when starting option storage part 114 is used to store the indication starting.Also can store this value that transmits from the outside.

Operation control part 120 comprises initial actuating determination section 121, timer 129.

Initial actuating determination section 121 is used for reading the starting option from starting option storage part 114 and decides initial actuating.

Timer 129 is used for compulsory exercise regularly.

The flow chart of the summary of the action of the communication node that can be used as first communication node 10 when Figure 12 is expression continuation trial renewal.

In step S902, initial actuating determination section 121 reads the starting option from starting option storage part 114.

In step S904, initial actuating determination section 121 is judged the content of starting option.If the content of starting option is to upgrade when starting, then branch transition is to step S206.If when starting the content 0 (normal) of option or not having option, enter into step S202.

Advance to the situation and embodiment one identical so omission of step S202.Below, the change aspect only is described.

Branch transition is also identical with embodiment one to the situation of step S206, but this in advance to branch transition to step S206 but not the reason of step S208 replenish.This be because: in automatic renewal in the past,,, but in the present invention,, express the situation of opening owing to the unlatching/shutoff of switching renewal portion 170 as long as directly upgrade owing to there is not the notion of unlatching/shutoffs of renewal portion 170.

Then, standby at the appointed time (step S906) afterwards, the front that is recycled to step S200 is step S202, this is the explanation according to Figure 10.

As Figure 10 (2), the time forcing more news in starting is useful in automobile etc.

(industrial utilizability)

(actual application)

Figure 13 is the key diagram of expression practical application of the present invention.As first communication node 10 it is found in PC11, PC12, the automobile 13 of physical node for the user of first communication node 10, the example of walking about in practice simultaneously describes.

If PC11 is arranged on oneself, PC12 is arranged on company.If the power supply of PC12 on Monday turns on Friday and turn-offs.

At this, for Mr.'s Mojo example from oneself to company in the morning.

Mr. Mojo eats the breakfast and has confirmed and PC11 sent the finish command, the company of driving towards of driving after the contact item in morning.

At this moment, PC11 being sent the finish command is equivalent to be used to make communication node to leave the initiation of expressing of net.That is, Mr. Mojo is PC11 as the found communication node of target side during oneself morning.

Mr. Mojo is multiplied by after the automobile 13, will start the engine certainly.

In starting the engine, exist and initiate.Constituting automobile 13 in the mode of forcing renewal (referring to Figure 10 (2)) when starting that illustrates in the application examples gets final product.At this, even oneself PC11 remains first communication node 10 midway end process, force to upgrade by this, find to turn to manual renewal also to be implemented automatically from node (being automobile 13 under this situation) with the starting of communication node with based on this target side.After this, become automobile 13 as the found communication node of target side.

Mr. Mojo arrives company, and following automobile 13 is come oneself desk in the company.At this moment, if cut off the engine of automobile 13, then still be equivalent to be used to make communication node to leave the initiation of expressing of net.

At this, the power supply of the PC12 of company is in the state of connection, if proceed the trial of renewal illustrated among the present invention, then has not been present on the net according to automobile 13, can detect not have first communication node 10, so PC12 finds that target side turn to oneself.After this, become PC12 as the found communication node of target side.

For the purpose of prudent more, point out that in advance target side is found the PC12 of the company that may transfer under the power supply of the PC11 that Mr. Mojo carries out disconnects than situation early.But even in this case, can judge from the explanation of having carried out: when Mr. Mojo opened the engine of automobile 13, target side became automobile 13, therefore can correctly follow the tracks of people's moving between communication node, found thereby finish target side.

In addition, Mr. Mojo is during company, even Mr.'s Mojo household opens the power supply of oneself PC11, after the starting that PC11 does not carry out illustrating in the application examples, force to upgrade and continue to attempt more under the news (Figure 10 (1)), the PC12 of company can continue to be found as target side, and oneself PC11 can not seize target side from PC12 and find.

Like this, the communication node that the recipient wishes is found as target side, and the people can the redirect communication node and walk about.

Claims

1. communication node, it can be used as target side and is found, it is characterized in that,

For providing the target side of target side discovery procedure to find server,, come the discovery procedure of controlled target side based on the external environment condition that the external environment condition test section is detected to sending the sources traffic node.

2. program, its by can be used as target side found communication node carry out, it is characterized in that,

Communication node is carried out:,, come the step of controlled target side's discovery procedure based on the external environment condition that the external environment condition test section is detected for providing the target side of target side discovery procedure to find server to sending the sources traffic node.

3. communication node, it can be used as target side and is found, it is characterized in that,

For providing the target side of target side discovery procedure to find server to sending the sources traffic node, based on the external environment condition that the external environment condition test section is detected, the unlatching/shutoff of switching part control renewal portion.

4. program, its by can be used as target side found communication node carry out, it is characterized in that,

Communication node is carried out: for providing the target side of target side discovery procedure to find server to sending the sources traffic node, based on the external environment condition that the external environment condition test section is detected, the step of the unlatching/shutoff of switching part control renewal portion.

5. communication node, it can be used as target side and is found, it is characterized in that,

For providing the target side of target side discovery procedure to find server to sending the sources traffic node, the external environment condition test section detects whether there is the found communication node with the presentation target side, and switching part is controlled the unlatching/shutoff of renewal portion based on described testing result.

6. program, its by can be used as target side found communication node carry out, it is characterized in that,

Communication node is carried out: for providing the target side of target side discovery procedure to find server to sending the sources traffic node, the external environment condition test section detects whether there is the found communication node with the presentation target side, and switching part is controlled the step of the unlatching/shutoff of renewal portion based on described testing result.

7. according to claim 1,3, each described communication node of 5, it is characterized in that,

Externally before the detection of environment, during starting renewal portion to target side discovery procedure control.

8. according to claim 1,3,5, each described communication node of 7, it is characterized in that,

Option according to when starting switches: externally renewal portion situation that discovery procedure is controlled to target side and the external environment condition that detected according to the external environment condition test section determine whether the situation that discovery procedure is controlled to target side before the detection of environment.

9. a communication system is characterized in that,

Be connected with by net: the employed transmission sources traffic of the promoter node that requirement begins to communicate by letter; The employed target side communication of recipient node; Find server with target side, wherein store the mapping of presentation target side and realistic objective side,

Wish to communicate by letter the user of node when communicating the user who sends the sources traffic node with target side, sending the sources traffic node finds server or net inquiry presentation target side or target side is found that server or net request connect to target side, find server or replying of net and know realistic objective side or attempt under the state of realistic objective side connecting not knowing from target side

When target side was the group that is made of the communication node that can be used as target side more than, a communication node that can be used as realistic objective side was found server to target side, will register as the pairing realistic objective side of presentation target side from node,

Found communication node is two when above can be used as target side, communication node beyond the described communication node, can will not register as the pairing realistic objective side of presentation target side from node, thus, the communication node of recipient's appointment as target side, is allowed send the sources traffic node and find.

10. a target side that is used for the described communication system of claim 9 is found server.

11. a target side is found server, wherein stores the presentation target side of target side communication node and the mapping of realistic objective side, it is characterized in that,

Corresponding with the control of target side discovery procedure, the control of this target side discovery procedure is performed in external environment condition by described target side communication node base.

12. a communication system, this communication system has interconnected by net: the employed transmission sources traffic of sender node; The employed communication node that can be used as target side more than or two of recipient; Find server with target side, wherein store the presentation target side of the described communication node that can be used as target side and the mapping of realistic objective side, it is characterized in that,

Described transmission sources traffic node, after request connected to described target side discovery server lookup presentation target side or to net, the realistic objective side communication node that this presentation target side is related to sent, and,

Described realistic objective side communication node is under the state of described connection, the communication node that can be used as target side receives or waits for reception, and, receive or wait under the situation of reception that other communication nodes that can be used as target side do not receive or wait for reception at realistic objective side communication node.

13. a communication system, this communication system has interconnected by net: the employed transmission sources traffic of sender node; The employed communication node that can be used as target side more than or two of recipient; Find server with target side, wherein store the presentation target side of the described communication node that can be used as target side and the mapping of realistic objective side, it is characterized in that,