CN100369431C - Networkable appliance - Google Patents
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- CN100369431C CN100369431C CNB2005100810404A CN200510081040A CN100369431C CN 100369431 C CN100369431 C CN 100369431C CN B2005100810404 A CNB2005100810404 A CN B2005100810404A CN 200510081040 A CN200510081040 A CN 200510081040A CN 100369431 C CN100369431 C CN 100369431C
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Abstract
Provided is a client/server system in which clients (terminal appliances) can uniquely determine to which server they are to be connected irrespective of whether a network has a single or plural servers. When connected to the network, a client obtains function information of each server on the network, and sets the server of the highest function, for example, as the server to which the clients are to be connected. A server compares, when a new server is connected to the network, its own function against the function of the server newly connected to the network to determine to which of the servers the clients are to be connected. The result is notified to the clients. Thus, to which server clients are to be connected is uniquely determined in a multi-server/multi-client network configuration.
Description
Technical field
The present invention relates to be connected to the electrical equipment of the Networkable of network.Particularly, the present invention relates to be applicable to the technology that each a plurality of network appliance that all have a server capability is connected to network.
Background technology
Current, be that the Internet communication of representative has evoked and indoor electrical equipment is connected to network and in the demand of indoor and outdoor by these electrical equipment of network control with the internet.
In order to make up home network, the server that has the terminal appliance (below be referred to as client) of network function and be used for controlling these clients is essential.If a plurality of clients are connected to server, then the user makes up one family network economical burden and comprises the cost of purchasing the server with power.
On the other hand, when only connecting small number of clients, the server capability that only needs to simplify is installed to one of client and just can makes up home network and need not the server of Premium Features is introduced home network.In this case, that client unification with server capability is carried out information management so that control client on network.The problem that the home network of this form may occur is because the disposal ability of the server capability of simplifying may be not sufficient to deal with the growth of the client terminal quantity that is connected to network from now on.So the user is except increase has the server of the power of satisfactory disposal ability and has no other way to home network.
Combinational network according to client and server can be taked different forms.The change of each network configuration or the expansion etc. by increasing, then the user just must reset network and adapts to this variation, for example, the purpose of connecting address to be automaticallyed switch.
JP2000-354062A has described a kind of technology that User Part is set the burden of handling that is used in this case alleviate.Its specification specifically discloses a kind of structure, and the address of the communicating appliance of the server of up-to-date interpolation or up-to-date interpolation can be registered automatically and be need not the manual operation by the network manager in structure.This structure is convenient to the registration of server address and communicating appliance address, thereby has alleviated network manager's burden.
Though in its specification, described technical notion from the trend network registry, but for above-mentioned network, up-to-date address of adding the server or the communicating appliance of network to, it is but not open when on network a plurality of server being arranged, and in a plurality of server electrical equipment which is by unique connection.
Summary of the invention
The present invention considers the problems referred to above, therefore.The purpose of this invention is to provide a kind of client/server system, in system, each client can both be unique determines which server it will be connected to and non-managed network has still a plurality of servers.
A first aspect of the present invention relates to a kind of electrical equipment (client) that is connected to the Networkable of network, comprising: connect the notice transmitting element, the electrical equipment that is used on network sends information has been connected to network with notice electrical equipment the fact; Information receiving unit is used for receiving the information that other electrical equipment from the network send; The connection management unit, the information that receives when information receiving unit is the response of sending from the electrical equipment (server) with server capability when connecting the response message of the information that the notice transmitting element sends, based on received response message the server capability of an electrical equipment and the server capability of another electrical equipment are compared, and determine that according to result relatively the electrical equipment of Networkable is to be connected to the electrical equipment which has server capability, and control allows Networkable appliance be connected to have on the electrical equipment of determining of server capability as possible.
Networkable electrical equipment (client) according to first aspect present invention, in itself, when it is connected to network, will on the function of a Networkable appliance (server) with server capability on the network and network, the function of another server compare.Have with what comparative result was found that the server of high server capability will be set at the server that client will connect.Therefore, according to a first aspect of the invention, when client was connected to network, it uniquely determined to be connected to which server.
Networkable appliance according to a first aspect of the invention can further include memory cell, be used for storing with the connection management unit Networkable appliance is connected to the related response message of electrical equipment with server capability, described response message is received from this electrical equipment with server capability by information receiving unit.
Equally, Networkable appliance according to first aspect present invention can further include a disconnection detection unit, whether the connection that is used for detecting the electrical equipment (server) with server capability disconnects, wherein, when the disconnection detection unit detected the connection disconnection of the electrical equipment (server) with server capability, the electrical equipment of then connection notice transmitting element on network resend information and notifies electrical equipment will be connected to network; Response is from connecting the information that the notice transmitting element resends, based on the response message that sends from electrical equipment with server capability, the connection management unit determines that Networkable appliance will be newly connected the electrical equipment with server capability, and control is connected to determined electrical equipment with server capability with Networkable appliance.
According to this aspect of the invention, the server that is connected to client in setting from network remove or the situation of expiry feature under, client is the function of each server on the comparing cell once more.The server with highest server capability that comparative result is found is set at the server that client will connect.Therefore, according to this aspect of the invention, when removing from network or stopping serving with the server that client has been connected, client oneself is unique determines to be connected to which server.
And Networkable appliance according to a first aspect of the invention can further include memory cell, is used for storing the information by the electrical equipment with server capability (server) of the selected server that will connect as Networkable appliance of Networkable appliance; And server determining unit, when being during by the information that information receiving unit received from information that the electrical equipment with server capability (server) that newly is connected to network is sent, the server capability (server) of an electrical equipment and the server capability (server) of another electrical equipment are compared with being stored in the information in the memory cell based on the information that receives, and, determine the electrical equipment (server) which Networkable appliance is connected to and has server capability according to relatively result.
According to this aspect of the invention, when server newly was connected to client network, client compared function of its current server that connects and the function that newly is connected to the server of network.Having higher function if find the server that newly is connected to network, is the server that client will connect with regard to setting new server then.Therefore, according to this aspect of the invention, when a new server was connected to network, client oneself determined separately which server it will be connected to.
Second aspect of the present invention relates to a kind of network of network electrical equipment (client) that is connected to, and comprising: information receiving unit is used for receiving the information that the electrical equipment on the network sends; Memory cell is used for storing the information by the electrical equipment with server capability of the selected server that will connect as Networkable appliance of Networkable appliance; The server determining unit, when being during by the information that information receiving unit received from information that the electrical equipment with server capability (server) that newly is connected to network is sent, the server capability of an electrical equipment and the server capability of another electrical equipment are compared with being stored in the information in the memory cell based on the information that receives, and, determine which Networkable appliance is connected to and has on the electrical equipment of server capability according to result relatively; And the connection management unit, its as possible control allow Networkable appliance be connected to by on the determined electrical equipment with server capability of server determining unit.
Networkable appliance according to a second aspect of the invention (client) when the electrical equipment with server capability (server) newly is connected to its network, compares the function of the current server that is just connecting and the function that newly is connected to the server of network.Having higher function if find the server that newly is connected to network, is the server that client will connect with regard to setting new server then.Therefore, according to a second aspect of the invention, when a new server was connected to network, client oneself is unique determined which server it will be connected to.
In Networkable appliance according to a second aspect of the invention, when by the determined electrical equipment of server determining unit be not with server capability Networkable appliance current connect have the electrical equipment of server capability the time, the connection management unit just allows Networkable appliance disconnect from its current connection, and Networkable appliance is connected on the determined electrical equipment of server determining unit.
The 3rd aspect of the present invention relates to a kind of Networkable appliance (server) with server capability, comprising: connect the notice transmitting element, the electrical equipment that is used on network sends information, and notice electrical equipment has been connected on the network; Information receiving unit is used for receiving the information that the electrical equipment on the network sends; Memory cell is used for storing the information of himself server capability; Client Connection Service device determining unit, when by the received information of information receiving unit being notifies another electrical equipment with server capability (server) when being connected to network, based on information that receives and the information that is stored in the memory cell function of himself and the function of another electrical equipment (server) are compared, and, determine that the electrical equipment on the network will be connected to the electrical equipment (server) which has server capability according to result relatively; And client Connection Service device notification unit, be used for to being connected to the information that electrical equipment on the network sends the server that indication will will connect as electrical equipment by the determined electrical equipment of client Connection Service device determining unit.
Networkable appliance according to a third aspect of the present invention (server) when the electrical equipment with server capability (server) when newly being connected to network, compares its server capability and the function that newly is connected to the server of network.Have higher function if find the server that newly is connected to network, then new server is set at the server that the client on the network will connect, the information with the result sends to each client simultaneously.Therefore, according to a third aspect of the present invention, when a new server was connected on the network, which server was the unique definite client of server will be connected to.
According to these aspects of the present invention, owing to increased new server or client or because server stops its function when changing in network, client is connected in the server uniquely and need not labor and be tired of the user when network configuration.
Thereby connect according to user's wish at electrical equipment and to determine under the configuring condition of network system in home network, some users may have certain difficulty aspect the final configuration of imagination system.The present invention makes the user who does not have technological know-how need not the user according to the change optimization system of system configuration at length to know how do i, more need not pose a difficult problem to the user.For example, if new server has higher function than the server that client connected by initialization system so that client switches to the new server in the system of being connected to, thereby make up the network of a high expansion.
Description of drawings
Aforesaid and other purpose and the novel characteristic of the present invention will be from below in conjunction with more being expressly understood the described embodiment of accompanying drawing, wherein:
Figure 1A and 1B have shown the structure example according to the network system of embodiments of the invention pattern;
Fig. 2 has shown the structure example according to the network system of the first embodiment of the present invention;
Fig. 3 has shown the client functionality module according to first embodiment;
Fig. 4 has shown the server capability module according to first embodiment;
Fig. 5 A, 5B, 5C and 5D have shown the example of the message of handling in the network system according to first embodiment;
Fig. 6 has shown the example according to the server info of first embodiment;
Fig. 7 A and 7B are the flow charts when being connected client according to first embodiment;
Fig. 8 is the flow chart when client is selected the Connection Service device according to first embodiment;
Fig. 9 is the flow chart when server is selected according to first embodiment;
Figure 10 A and 10B are the flow charts when server is connected according to first embodiment;
Figure 11 is the flow chart according to the server process when a new server adds network to of first embodiment;
Figure 12 has shown client functionality module according to a second embodiment of the present invention;
Figure 13 has shown server capability module according to a second embodiment of the present invention;
Figure 14 A, 14B and 14C have shown the example of the message that the network system in is according to a second embodiment of the present invention handled;
Figure 15 is the flow chart when connecting client of being used for according to second embodiment;
Figure 16 is according to the client process flow figure when selecting client Connection Service device of second embodiment; With
Figure 17 is the server process flow chart when adding a new server to network according to second embodiment.
Embodiment
Now the embodiments of the invention pattern will be described in conjunction with the accompanying drawings.
Figure 1A and 1B have shown the structure example according to the network system of embodiments of the invention pattern.
Shown in Figure 1A is the example of network configuration, wherein, a client 10A with server capability is arranged on network.When server client 10A had only a workbench in network, client 10A just was connected to its server section.
Shown in Figure 1B also is the example of network configuration, and wherein, a plurality of clients all have the function of server.When the client 10B with server capability and the client 10C that do not have a server capability newly are connected on the network that has been connected with the client 10A with server capability, by network exchange data (message), so that each server capability relatively, and to be connected to the processing of which server for each client executing judgement client.
If the function of the server section that loads in client 10B is better than being carried in the function of the server section among the client 10A, then be connected with client as server with regard to the server section of selecting the new client 10B that connects.Then, client 10A disconnects and connects with the server section of client 10B from its server section.
If the function of the server section among the function of the server section in the new client 10B that connects and the client 10A of the current connection of client is identical, then current more multi-client connects server section thereon, promptly, server section among the existing client 10A still is chosen as the server that client will connect.In this case, newly be connected to the client 10B of network and 10C and currently connect as the server section among the client 10A of server capability.
If the function of the server section among current and the client 10A that client is connected is better than the function of the server section among the new client 10B that connects, then newly be connected to the client 10B of network and the server section that 10C just is connected to the client 10A that has been connected with client.
Therefore, when a plurality of clients are connected to network, select to have the server that the server section of highest level function will be connected to as client.Determine to want it be connected to which server because client is unique, therefore selected server administrative institute's information to be processed in a concentrated manner.
Figure 1A and 1B have shown the example of the situation the when client with server capability is connected to network.Client described above selects to be connected to the situation that processing where also goes for being connected to when server rather than client with server capability network.For the purpose of clear and definite, if server is connected to network with the client with server capability, then relatively the function of the server section of the function of server and client has the server of highest level function or the place that server section will be connected to as client with selection.
Now, with describe in detail given embodiments of the invention.
In the following description book, use TCP/IP (transmission control protocol)/(Internet protocol) and UDP (User Datagram Protoco (UDP)) agreement as network service.The message that exchanges between client and server is used according to the SGML of XML (expansion SGML) and is write.The message that exchanges between client and server transmits by IP multileaving or UDP single-point or TCP sends or receives.
In following embodiment, when being connected to network, client or server carried out the operation of the connection processing of the operation of client and server and client-server.Other communication process and the prior art of client-server communication process are similar, therefore are not repeated in specification.
In the following description, the electrical equipment with client functionality only is referred to as client, and the electrical equipment (comprising the client with server capability) with server capability is referred to as server.
(first embodiment)
Fig. 2 has shown the structure example according to the network system of first embodiment.Network system in an embodiment has a client 10 and server 20A and 20B.
At first, when client 10 was connected to network, client 10 sends expression by the IP multileaving immediately, and it had been connected to the announcement message of network.If server 20A does not have to give the announcement message of sending from client 10 to send response, then client 10 sends announcement message repeatedly by the IP multileaving and sends response up to server 20A.In first embodiment, client 10 does not have the structure that receives IP multileaving data.
Be the announcement message of response from client 10, server 20A transmits by the UDP single-point and sends its position on network of expression and the signature information of function.Client 10 receives the signature information that is sent, and uses the signature information that is received to determine which server is client 10 will be connected to.
Thereafter, server 20B is up-to-date is connected to network and represents that by IP multileaving transmission it has been connected to the announcement message of network immediately.Therefore client 10 does not receive announcement message, but is received by the server 20A that may receive the IP multileaving owing to do not receive the structure of IP multileaving data.
The current server 20A that works as client Connection Service device uses the announcement message that receives the server capability of the function of the server 20B that newly connects and its oneself to be compared (at server 20A is to have under the situation of client electrical equipment of server capability, the function of its server section is being currently connected to client), thus determine which server is client will be connected to.If the server of selecting the new server 20B that connects will be connected to as client, then server 20A redirects message for each client transmission in the network, will be connected to new server (server 20B) with the notice client.
In the present embodiment, when a client newly was connected in the network, the client of being added oneself compared the function of the server in network to determine which server it will be connected to.When a server newly was connected to network, the server that connects existing client as current server work compared its server capability with the server capability of the server that newly is connected, to determine which of two clients of connection.
Fig. 3 is the functional structure chart of client 10.
When client 10 is carried out pilot operationp, start processing unit 101 and carry out various initialized processing.Start processing unit 101 requesting client bulletin creating unit 102 and send announcement message, so that notice is connected to the server of network, client 10 has just been carried out pilot operationp.
Client announcement creating unit 102 is created announcement message according to the transmission request that comes self-starting processing unit 101, and request IP multileaving transmitting element 103 sends announcement message.At this moment, client announcement creating unit 102 produces the timer register requirement and gives regularly management unit 104, simultaneously, receives the response of announcement message in certain time cycle of appointment.
IP multileaving transmitting element 103 sends announcement message according to the request from client announcement creating unit 102 by the IP multileaving.
104 registrations of timer management unit and deletion timer coprocessor.Can activate the timer of registration by particular time interval.
UDP single-point receiving element 106 receives by the UDP single-point and transmits the bag data that sent.The bag data that received by UDP single-point transmit receive unit 106 are sent to reception message processing unit 107.
It is not the data of signature information that reception message processing unit 107 abandons except that the UDP bag data that receive from the electrical equipment that is connected to network.Receiving message processing unit 107 allows the received signature information of staging server information memory cell 108 temporary transient reservations be activated up to timer coprocessor unit 105.
108 reservations of staging server information memory cell are activated up to timer processing unit 105 by UDP single-point transmit receive unit 106 received signature information.When timer processing unit 105 is activated, if do not have storing message in the interim eye affair device information memory cell 108, in other words, UDP single-point transmit receive unit 106 does not receive signature information, then staging server information memory cell 108 produces another timer register requirement for regularly management unit 104, and request IP multileaving transmitting element 103 sends the announcement message of being created by client announcement creating unit 102.In staging server information memory cell 108, store message, simultaneously under the situation that timer processing unit 105 is activated, temporary transient server info memory cell 108 requesting client Connection Service device determining units 109 select client will be connected to which server, and request timer management unit 104 deletion timers.
Create server info in the signature information of client Connection Service device determining unit 109 from be stored in staging server information memory cell 108.Client Connection Service device determining unit 109 is used following condition and is pressed the order qualification server of its statement:
(A). server has higher function, in other words, has greater functionality,
(B). more client be connected to server and
(C). server has minimum identifier server, that is, when the character string of server during with the comparison of ascii character digital value, server has the character string of minimum value.
When the server of selecting client to connect, determine selected server according to the result of screen.Can describe in detail later on and select client Connection Service device to handle.
The information of the current server that connects of client Connection Service device information memory cell 110 storage clients.
When TCP client 113 disconnects with its client Connection Service device and the connection client-server that links to each other with the new server that is connected when receiving the message that redirects from requesting client, connection management unit 112 sends the request of disconnection to disconnect the connection between client-server for TCP client 113.
When producing the request of Connection Service device 20A or 20B, connection management unit 112 request TCP clients 113 are connected to server.After finishing connection, every the message that is received from TCP client 113 is transmitted to using processing unit 111 in connection management unit 112.
TCP113 is connected in the server one according to ICP/IP protocol, and control communication.
Fig. 4 is the functional block diagram of server 20 (server 20A or 20B).
As shown in Figure 4, server 20 has two funtion parts, plug and play processing section and application processing section.The plug and play processing section has the processing unit 201 of startup, server announcement creating unit 204, IP multileaving transmitting element 205, IP multileaving receiving element 206 receives message processing unit 207, signature creation unit 208, the UDP single-point transmits transmitting element 209, client Connection Service device selected cell 210 redirects creating unit 211 and connection management unit 212.Use the processing section and have processing unit 213, routing processing unit 214 and the TCP server 215 of application.
Start processing unit 201 when server 20 is carried out pilot operationp, carry out various initialization operations, and request server bulletin creating unit 204 transmission announcement message, so that informing network server 20 just has been directed.
In the server info of server announcement creating unit 204 from be retained in connection management unit 212, according to creating announcement message by the transmission request that starts processing unit 201 generations.Server announcement creating unit 204 request IP multileaving transmitting elements 205 send announcement message.
IP multileaving transmitting element 205 sends the announcement message of being asked transmission by server announcement creating unit 204 by the IP multileaving.
IP multileaving receiving element 206 receives the IP multicast message.The message that is received by IP multileaving receiving element 206 is sent to reception message processing unit 207.
Receiving message processing unit 207 handles by the received message of IP multileaving receiving element 206.
If received message is announcement message, then receives ask for an autograph creating unit 208 of message processing unit 207 and create tag message and come to transmit tag message is sent to client 10 as bar announcement message sender with response bar announcement message by the UDP single-point.
On the other hand, if received message is announcement message, then receives message processing unit 207 requesting client Connection Service device selected cells 210 function that its server the had function with the server that sends the bar announcement message is compared to select client will be connected on which server.
In the information of signature creation unit 208 from be retained in connection management unit 212, according to creating tag message from the transmission request that receives message processing unit 207.Signature creation unit 208 request UDP single-points transmit transmitting element 209 and send strip label message.
The UDP single-point transmits transmitting element 209 and sends bar is asked transmission by signature creation unit 208 message by the transmission of UDP single-point.
Client Connection Service device selected cell 210 compares server capability that it the had function with the server that sends the announcement message that bar received by IP multileaving receiving element 206.By using the server alternative condition, client Connection Service device selected cell 210 determines which server will enter operating state.If the server of selecting the sender is as workspace server, then client Connection Service device selected cell 210 is just asked to redirect creating unit 211 establishments and is redirected message.
Redirect the request of creating unit 211 according to client Connection Service device selected cell 210, establishment will send to the message that redirects of the client that is connected on the server, and request TCP server 215 sends bars and redirects message.
The request that routing processing unit 214 response to network come.Routing processing unit 214 inside remain with routing table, and table is used at a plurality of client 10A, 10B, 10C ... external server and application processing unit 213 between the seamless communication of message.
Next, will be described in handled message in the network system according to first embodiment.
Fig. 5 A, 5B, what 5C and 5D showed is the client announcement message of handling in network system according to first embodiment, server announcement message, signature information and the example that redirects message.These message all are used to notify the client or the server that will be connected to network, the notice from a client Connection Service device switch to another etc.
When client 10 or server 20 be connected to network, client 10 or server 20 sent announcement message by multileaving and represent that client 10 or server 20 have been connected to network.The announcement message that is sent by server 20 comprises the expression position of server 20 on network and the information of its function.
Hereinafter, the announcement message that is sent by client 10 is referred to as " client announcement message ", and the announcement message that is sent by server 20 is referred to as " server announcement message ".
Fig. 5 A has shown the example of client announcement message.In the example of Fig. 5 A, client announcement message is write with the SGML of XML for example, and constitutes " bulletin " information that is defined as, and sends to all resources that are connected to network from the particular address that writes on after " from ".
Fig. 5 B has shown the example of server announcement message.In the example of Fig. 5 B, server announcement message is write with the SGML of XML for example, and is defined as " signature " information and sends to all resources that are connected to network from the particular address that writes on after " from ".
Signature information be the expression server 20 that sends from eye affair device 20 network the position and when the information of the function of server when client 10 receives client announcement message.
Fig. 5 C has shown the example of signature information.In the example of Fig. 5 C, signature information is write with the SGML of XML for example, and is defined as " signature " information, and sends to the particular address that writes on after " to " from writing on particular address after " from ".
Reorientating message is will newly be connected to the server 20 of network as client Connection Service device information by the expression that client Connection Service device is sent.
Fig. 5 D has shown the example of reorientating message.In the example of Fig. 5 D, reorientate message and write, and be defined as " redirecting " information, and send to the particular address that writes on after " to " from writing on particular address after " from " with the SGML of XML for example.
Fig. 6 has shown an example of the server info of being managed by server.
Server info is one group of information on server, and it has comprised identifier server, the IP address, and feature list, and what clients expression has be connected to the information of server.
Identifier server has shown the name of server.
The IP address has shown the IP address of server.
Feature list is the tabulation of all functions that have of server and the string expression that is associated with these functions.
The client terminal quantity that is connected has shown the client terminal quantity that is connected to server.
The information of server is kept in the server 20 as its oneself information, is inserted into simultaneously and sends to client in the signing messages.
In case receive signing messages, client just reads in every data in the message to create or the information of update service device.
Below description is had an above structure network system how to work.
At first, with the operation of describing when client is connected to server.
The flow chart of Fig. 7 A and 7B has shown handling process performed when client 10 is directed after starting server 20A, and the server 20A that is wherein connected has structure shown in Figure 2.
At first, according to enabled instruction, the startup processing unit 101 in client 10 is carried out to start and is handled (step S300).
Then, client announcement creating unit 102 is created client announcement message (step S1000).
In case in client creating unit 102, created client announcement message, then the timer (step S1002) of specifying special time is just set in timer management unit 104, and request IP multileaving transmitting element 103 is carried out the processing that is sent in the client announcement message of being created in the client announcement creating unit 102.
In case receive request, IP multileaving transmitting element 103 just sends client announcement message (step S1004).UDP single-point transmit receive unit 106 is waited for and is received the signature information that sent from server 20A with customer in response end announcement message (step S1006).
When UDP single-point transmit receive unit 106 receives signature information (step S1006Y), receive message processing unit 107 and create server info (step S1008) according to the signature information that receives.The server info of being created temporarily is retained in (step S1010) in the staging server information memory cell 108.
On the other hand, when UDP single-point transmit receive unit 106 does not receive signing messages in step S1006 (step S1006N), then judge the special time on timer, set whether depleted (step S1012).If special time is not also spent (step S1012N), then handling process forwards step S1006 to wait for the signing messages that receives to come from server 20A.
Exhausted (step S1012Y) if judge the special time of setting on timer in step S1012, then timer management unit 104 is deleted timers and is judged whether staging server information memory cell 108 remains with server info (step S1014).
When in step S1014, judging in staging server information memory cell 108, there is not server info (step S1014N), then timer management unit 104 is set a timer (step S1002) of specifying special time once more, allows IP multileaving transmitting element 103 send client announcement message (step S1004) simultaneously.
When judgement remains with one or more server info in staging server information memory cell 108 in step S1014 (step S1014Y), client Connection Service device determining unit 109 is used the server info that is kept in the staging server information memory cell 108 to carry out server and is selected to handle (step S1018).The details that server is selected to handle will be described below.Select the information of the server that treatment of selected selects to be kept in the client Connection Service device information memory cell 110 (step S1020) by server, and the information that temporarily is retained in the staging server information memory cell 108 is dropped (step S1022).
Then, connection management unit 112 is operatively connected in step S1018 the server of determining the server that will connect as client as possible, and wherein the structure of server 20A as shown in Figure 2.Under the control that connects control unit 112, TCP client 113 is connected to server 20A with client 10.
When client 10 successfully was connected to server, processing finished in step S1024 (step S1026Y).On the other hand, when connection failure (step S1026N), handling process forwards step S1000 to.
Next how will describe when new server is connected to network client operates.
Flow chart among Fig. 8 has schematically shown the handling process that client 10 is connected to server when server 20B newly is connected in the network of structure as shown in Figure 2.Following case description the situation of the server 20B new server that will connect as client of selecting newly to be connected to network.
When server 20B newly was connected to network, the server 20A of the current connection of client judged which server is client will be connected to.
If conclude the server that the server 20B of connection newly will connect as client, then the current server 20A that connects of client comprises the information that redirects that the indication client switches to the information of the information of another server and the server that the given client end will switch just for each client transmission.The relevant processing of carrying out in server in connection processing will be described below.
When the TCP of client 10 client 113 receives (step S400Y) when redirecting message, receive message processing unit 107 according to being included in the information creating server info (step S402) in the message of redirecting that is received.
Next, connection management unit 112 control as possible disconnects (step S404) with client 10 from the current server 20A that connects, and while TCP client 113 is connected to client 10 the server 20B (step S406) of the server that selection will connect as client.
When in step S406 (step S408Y), successfully connecting the clients to server 20B, client Connection Service device determining unit 109 gives client Connection Service device information memory cell 110 storages (step S410) information of server, thus end process.On the other hand, when connection failure in step S406 (step S408N), handling process forwards the step S1000 among Fig. 7 B to.
The server of carrying out in the step S1018 of Fig. 7 B is selected to handle will be in following description.Handle by the client Connection Service device determining unit in client 10 109 and carry out.
Flow chart among Fig. 9 has schematically shown the handling process of the unique service device that the selection client will connect from one or more servers.
At first, the server info (referring to Fig. 6) of considering optional server (in this example for 20A and 20B) compares the feature list information that is comprised in each server info.The server with maximum functions (step S500) that selection is found.
If in step S500 (step S502Y), only selected a server, then determine the server (step S510) that selected server will be connected as client.On the other hand, if selected a plurality of servers in step S500 (step S502Y), then the quantity of the client of the connection that is relatively comprised in each server info has the maximum server (step S504) that connects client terminal quantity to select.
If in S504 (step S506Y), only selected a server, then determine the server (step S510) that selected server will be connected as client.If in S504 (step S506N), selected a plurality of servers, then from a plurality of servers, select one (step S508).For example, selected server is the server with minimum service device identifier in step S508, in other words, is exactly that server has the character string of minimum value when character string that compares server and ascii character digital value.So just selected server is decided to be the server (step S510) that client will connect.
The operation of server is described below.
The flow chart of Figure 10 A and 10B schematically illustrates and performedly in server 20A is connected to the handling process with server 20A shown in Figure 2 up to client 10 from the startup of following the client 10 that server 20A starts.
Shown in Figure 10 A, the boot of server 20A allows and starts processing unit 201 execution startup processing (step S600), and server announcement creating unit 204 is created server announcement message (step S602) simultaneously.
The server announcement message of creating in server announcement creating unit 204 sends (step S604) by IP multileaving transmitting element 205.
When IP multileaving transmitting element 205 send server announcement message, server 20A is transformed into the connection request wait state, to wait for the connection request of bringing in from the client (step S606).
Flow chart among Figure 10 B has schematically shown the handling process that the server 20A in being in the connection request wait state carries out when receiving from client announcement message that client 10 is sent among server 20A.
Client announcement message is received by the IP multileaving receiving element 206 of server 20A, and received client announcement forwards is to receiving message processing unit 207.
Receive message processing unit 207 and confirm that the message of transmitting from receiving element 206 is client announcement message (step S608) really.Then the signature information (step S610) that sends to the client that has sent client announcement message is created in signature creation unit 208.
In case created signature information, signature creation unit 208 is just asked the UDP single-point to transmit transmitting element 209 this signature information is sent to client 10 as the sender of client announcement message.
Signature information has just sent to the client there (step S612) as the sender of client announcement message like this.Subsequently, server 20A is transformed into the connection request wait state, to wait for the connection request (step S606) from client 10.
Flow chart among Figure 11 schematically shown when existing server in the network by with reference to the processing procedure of the described step S604 of figure 10A when newly being connected to the server reception server announcement message of network performed handling process.
When the reception of the 206 monitoring service device announcement message of the IP multileaving receiving element in being connected to the server 20A of network (step S700), IP multileaving receiving element 206 receives the server announcement message (step S700Y) that sends from the server 20B that newly is connected to network.In the case, the client Connection Service device selected cell 210 of server 20A judges whether server 20A is set at the server (step S702) that client will connect with reference to the server info that is stored in the connection management unit 212.
Be not set at the server (S702N) that client will connect if judge server 20A, then handling process forwards step S700 to.
(step S702Y) on the other hand, if judge server 20A be set at the server that client will connect, then client Connection Service device selected cell 210 is according to the server announcement message establishing server info that is received, and the server info created and its oneself are retained in server info in the connection management unit 212 compare to carry out server and select processing (step S704).Identical (referring to Fig. 9) handled in the selection that server in step S704 is selected to handle with in client described above.In step S704, be exactly server 20A itself and the server 20B that newly is connected corresponding to the option of the step S500 in Fig. 9.
The result that selection is handled according to server, if client Connection Service device selected cell 210 is selected own server (step S706Y) as oneself, then handling process forwards step S700 to.
On the other hand, if the server of selecting in step S704 is the new server 20B (step S706N) that connects, then redirect creating unit 211 and redirect message (step S708) for switching to server 20B establishment, the message that redirects that TCP server 215 will be created sends to the client (step S710) that is connected server 20A.Subsequently, server 20A forwards the disconnection wait state to.
When being connected to server, client 10 continues to check that whether server is in work.Check that by the universal method that is used in the TCP flow process whether client is in work.For example, used a kind of method, the SYN packet sends to server regularly judging the connection be retained between the server and client side when correspondingly receiving ACK in method, and judges to disconnect when not receiving ACK and connect.
When the server 20 that detects client 10 connections shuts down, in other words, when detecting server 20 disconnections, client Connection Service device determining unit 109 deletions in client 10 are from the server info of the server that is connected to client 10 of client Connection Service device information memory cell 110.Follow connection management unit 112 and control server 20 disconnections that client 10 is connected from client 10 as possible, TCP client 113 disconnections simultaneously are connected with server 20.
Subsequently, the handling process among client 10 execution graph 7A and 7B and Fig. 9 is to select and to set the new server that client 10 will be connected.The information that is set at the server that client 10 will connect is retained in the client Connection Service device information memory cell 110.
According to first embodiment, when client was connected to network, client oneself can determine which server it will be connected to based on the information that receives from server is unique.When a new server was connected to network, it had been connected to network the existing server of new server notification, used the server info that is included in the notice to determine which server is client will be connected to simultaneously.According to determining notice, client can uniquely determine which server it will be connected to.
As mentioned above, according to first embodiment, when network configuration changes, can be automatically and determine the server that client will connect uniquely.Therefore first embodiment can lower the burden of user when the reply network configuration changes.
(second embodiment)
The place that the second embodiment of the present invention is different with first embodiment is that client receives the server announcement message of sending from eye affair device by multileaving.
In order to describe in detail, in first embodiment, client can not be received in the server announcement message that sends among the step S604 of Figure 10 A, that is, when server newly is connected to network from server by server announcement message that multileaving sent.Therefore, when new server was connected to network, server determined which server is client will be connected to, and this decision sends with the form that redirects message that sends to client.Instruct client to be connected to determined server with this.
On the contrary, also has an IP multileaving receiving element 114 structure of client in a second embodiment in having first embodiment.When a server newly is connected to network, thereby client receives the server announcement message execution client Connection Service device selection processing that sends from new server by multileaving.Because it is not server but carries out the client that client Connection Service device is selected processing that when new server is connected to network therefore second embodiment does not need server to carry out and is used to create and transmit the processing that redirects message.
Below second embodiment will be described.
In a second embodiment, with first embodiment in identical part be denoted by the same reference numerals.Below will omit with first embodiment in the description of identical functions part and handling process and description funtion part and the handling process different only with first embodiment.
Figure 12 is the functional block diagram of client 10.
IP multileaving receiving element 114 receives the IP multicast message.The message that receives sends to and receives message processing unit 107.
Except signature information and server announcement message, the message that is received by UDP single-point transmit receive unit 106 or IP multileaving receiving element 114 all is received message processing unit 107 and is abandoned.When UDP single-point receiving element 106 received signature information, reception message processing unit 107 allowed staging server information memory cell 108 keep the signature information that receives and is activated up to timer processing unit 105.On the other hand, when IP multileaving receiving element receives server announcement message, receive message processing unit 107 and allow the received server announcement message of staging server information memory cell 108 reservations finish the processing which server is definite client will be connected to up to client Connection Service device determining unit 109.
Staging server information memory cell 108 has kept the message that is received by UDP single-point transmit receive unit 106 or IP multileaving receiving element 114.If in staging server information memory cell 108, do not store any message, in other words, UDP single-point transmit receive unit 106 does not receive signature information, timer processing unit 105 is activated simultaneously, staging server information memory cell 108 produces another timer depositing request and gives regularly management unit 104, and request IP multileaving transmitting element 103 sends the client announcement message of being created by client announcement creating unit 102.If having stored message in staging server information memory cell 108 is activated timer processing unit 105 simultaneously, then staging server information memory cell 108 requesting client Connection Service device determining units 109 server of selecting clients to connect, and request timer management unit 104 deletion timers.
Figure 13 is the functional block diagram of server 20 (server 20A or 20B).
As shown in figure 13, server 20 has two funtion parts, plug and play processing section and application processing section.The plug and play processing section has the processing unit 201 of startup, server announcement creating unit 204, IP multileaving transmitting element 205, IP multileaving receiving element 206, receive message processing unit 207, signature creation unit 208, the UDP single-point transmits transmitting element 209 and connection management unit 212.Use the processing section and have processing unit 213, routing processing unit 214 and the TCP server 215 of application.
The client Connection Service device selected cell that in first embodiment, provided 210 and redirect creating unit 211 and in the server 20 of second embodiment, be removed.
Except client announcement message, the message that is received by IP multileaving receiving element 206 all is received message processing unit 207 and abandons.If the message that receives is client announcement message, then receiving ask for an autograph creating unit 208 of message processing unit 207 creates signature information and transmits transmitting element 209 by the UDP single-point and send the bar signature information to the client 10 as the client announcement sender of the message, with customer in response end announcement message by UDP.
Figure 14 A, 14B and 14C have shown the example according to handled message in the network system of second embodiment, that is, and and client announcement message, server announcement message and signature information.These message of handling in a second embodiment have with handled corresponding message in first embodiment and have identical structure.Owing to need not to redirect message as previously mentioned, therefore server is not in a second embodiment carried out the processing that client is switched to the server that will connect.The server info of Chu Liing is identical with handled server info in first embodiment in a second embodiment.
How below will describe client and server works.
The flow chart of Figure 15 schematically shown when server 20A be connected to network and client 10 grades when being connected to server in client 10 performed operational processes.Performed operating process is identical with handling process (Fig. 7 A and 7B) in first embodiment in the client 10 at embodiment when server 20A is connected to network (being directed) back client 10 and is connected to network (being directed), and therefore omission is to its description.
If the IP multileaving receiving element 114 in client 10 receives server announcement message when being connected to server (step S310Y) when client 10 is waiting, then client Connection Service device determining unit 109 is created server info according to received server announcement message.The server info of creating is stored in the client Connection Service device information memory cell 110.Then, connection management unit 112 is operatively connected to the server 20A of send server announcement message as possible, and TCP client 113 is connected to server 20A (step S312) with client 10 simultaneously.
When client 10 successfully is connected to server in step S312 (step S314Y), end process.On the other hand, when connection failure in step S312 (step S314N), handling process forwards the step S1000 of Fig. 7 B to.
When the flow chart of Figure 16 has shown the server termination work that will connect when the client 10 with structure shown in Figure 2 in client 10 performed flow process.
When being connected to server, client 10 continues to check that whether server is in work.Check by employed universal method in TCP handles whether the server that connects client 10 works.For example, used a kind of method, the SYN packet sends to server regularly judging the connection be retained between the server and client side when correspondingly receiving ACK in method, and judges to disconnect when not receiving ACK and connect.
When the server 20 that detects client 10 connections shuts down, in other words, when detecting server 20 disconnections (step S420Y), client Connection Service device determining unit 109 deletions in client 10 are from the server info of the server that is connected to client 10 of client Connection Service device information memory cell 110.Then connection management unit 112 is controlled as possible client 10 is disconnected from the server 20 that client 10 is connected, and while TCP client 113 disconnects be connected (the step S422) with server 20.Subsequently, handling process forwards step S1000 (referring to Fig. 7 B) to.
Next the operating process of carrying out in client 10 is described when server 20B newly is connected to network after client 10 is connected to server 20A.
The flow chart of Figure 17 has schematically shown when server 20B newly is connected to network after being connected to the server 20A with structure shown in Figure 2 in client 10, the operating process of carrying out in client 10.
When client 10 when waiting for the reception server announcement message (step S430 and S430N), from the next server announcement message of server 20B, that is, announcement server 20B newly adds the server announcement message of network to, receives (step S430Y) by IP multileaving receiving element 114.Receive message processing unit 107 according to the information creating server info (step S432) that is included in the server announcement message that receives, and server info is kept at (step S434) in the staging server information memory cell 108.
Then client Connection Service device determining unit 109 uses the server info execution server that is kept at the server info in the staging server information memory cell 108 and is kept in the client Connection Service device information memory cell 110 to select to handle (step S436).Particularly, client Connection Service device determining unit 109 uses two class server infos to come newly to be connected to the server capability of function and the current server that is connected as client of the server of network.Client Connection Service device determining unit 109 is used following condition and is limited server by the order of its statement:
(A). server has higher function, in other words, has greater functionality,
(B). more client be connected to server and
(C). server has minimum identifier server, that is, when the character string of server during with the comparison of ascii character digital value, server has the character string of minimum value.
Result according to screen when the server of selecting client to connect determines selected server.
If select newly to be connected to the server (step 438Y) that the server of network will connect as client in step, then connection management unit 112 is controlled client 10 as possible and is disconnected (step S440) from the server 20A that client 10 is connected.
When client 10 successfully was connected to server in step S442 (step S444Y), server info was stored in the client Connection Service device information memory cell 110 (step S446) by client Connection Service device determining unit 109, and processing simultaneously finishes.On the other hand, when connection failure in step S442 (step S444N), handling process forwards the step S1000 of Fig. 7 B to.
At last, will the operation of server in a second embodiment be described.
Performed handling process is identical with respective handling flow process (referring to Figure 10 A and 10B) in first embodiment in server when client behind startup of server guides.
If when being set at the server that client will connect, newly in network, add a server again with one in the existing server, unless then current server still keep with client be connected according to the client Connection Service device of in client, carrying out select handling process the result and with the disconnection that is connected of client.
When the connection between current server and the client selects the result of processing to disconnect according to the client Connection Service device in client, current server updates stored in the server info in the connection management unit 212, is reflected in the server info so that disconnect.Particularly, current server is successively decreased and is stored in the connection management unit 212 the number clients that is connected as server info.
According to second embodiment, when server was connected to network, it had been connected to network the server notification client.Client can uniquely determine according to the server info that is included in the notice which server they will be connected to, and can be connected to definite server that will connect really.
Embodiments of the invention have more than been described.But be not that the present invention only only limits to these embodiment, it can also have various modifications.
For example, outside employed in an embodiment of the present invention TCP/IP and the UDP, communication protocol can also be used for the communication of whole network.
Employed message also can be write with other SGML except XML between client and server.
The message that is exchanged by the IP multileaving between client and server also can exchange by IP broadcast.
The present invention can make various suitable modifications in the defined technology category of its claim.
Claims (6)
1. one kind is connected to network of network electrical equipment, comprising:
Connect the notice transmitting element, the electrical equipment that is used on network sends information, has been connected to network with notice electrical equipment;
Information receiving unit is used for being received in the information that other electrical equipment on the network send;
The connection management unit, when by information that information receiving unit received for the response that sends from electrical equipment with server capability when connecting the response message of the information that the notice transmitting element sends, compare the server capability of an electrical equipment and the server capability of another electrical equipment based on received response message, and according to result relatively, determine the electrical equipment which Networkable appliance will be connected to and have server capability, and control is connected to determined electrical equipment with server capability with Networkable appliance;
The disconnection detection unit, whether the connection that is used for detecting the electrical equipment with server capability disconnects,
Wherein, when the disconnection detection unit detects the connection disconnection of the electrical equipment with server capability, connect the electrical equipment of notice transmitting element on network and resend information, notice electrical equipment has been connected to network; Wherein, response is from connecting the information that the notice transmitting element resends, based on the response message that sends from electrical equipment with server capability, the connection management unit determines that Networkable appliance will be newly connected the electrical equipment with server capability, and control is connected to determined electrical equipment with server capability with Networkable appliance.
2. Networkable appliance according to claim 1, it is characterized in that also comprising memory cell, be used for storing with the connection management unit Networkable appliance is connected to the related response message of electrical equipment with server capability, described response message is received from this electrical equipment with server capability by information receiving unit.
3. Networkable appliance according to claim 1 is characterized in that also comprising:
Memory cell is used for storing the information that is chosen as the electrical equipment with server capability of its server that will be connected to by Networkable appliance;
The server determining unit, when information that information receiving unit received is when newly being connected to the information that the electrical equipment with server capability of network sends, compare the server capability of an electrical equipment and the server capability of another electrical equipment based on received information and the information that is stored in the memory cell, and, determine the electrical equipment which Networkable appliance will be connected to and have server capability according to relatively result.
4. one kind is connected to network of network electrical equipment, comprising:
Information receiving unit is used for receiving the information that the electrical equipment on the network sends;
Memory cell is used for storing the information that is chosen as the electrical equipment with server capability of its server that will be connected to by Networkable appliance;
The server determining unit, when information that information receiving unit received is when newly being connected to the information that the electrical equipment with server capability of network sends, compare the server capability of an electrical equipment and the server capability of another electrical equipment based on received information and the information that is stored in the memory cell, and, determine the electrical equipment which Networkable appliance will be connected to and have server capability according to relatively result;
The connection management unit is used to control Networkable appliance is connected to by the determined electrical equipment with server capability of server determining unit.
5. according to the Networkable appliance of claim described 4, it is characterized in that when by the determined electrical equipment of server determining unit be not with server capability current network electrical equipment connected have the electrical equipment of server capability the time, the connection management unit disconnects the electrical equipment of Networkable appliance from current connection, and Networkable appliance is connected to by the determined electrical equipment of server determining unit.
6. Networkable appliance with server capability comprises:
Connect the notice transmitting element, the electrical equipment that is used on network sends information, and notice electrical equipment has been connected to network;
Information receiving unit is used for receiving the information that the electrical equipment on the network sends;
Memory cell is used for storing the information of its server capability;
Client Connection Service device determining unit, when being when notifying another electrical equipment to be connected to the information of network by the information that information receiving unit received with server capability, based on received information and the information that is stored in the memory cell its server capability and the server capability of another electrical equipment are compared, and, determine that the electrical equipment on the network will be connected to the electrical equipment which has server capability according to result relatively;
Client Connection Service device notification unit is used for sending information to the electrical equipment that is connected to network, and this information shows the electrical equipment that will be connected as electrical equipment by client Connection Service device determining unit determine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004195079 | 2004-06-30 | ||
| JP2004195079 | 2004-06-30 | ||
| JP2005130655 | 2005-04-28 |
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| CN1716896A CN1716896A (en) | 2006-01-04 |
| CN100369431C true CN100369431C (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100810404A Expired - Fee Related CN100369431C (en) | 2004-06-30 | 2005-06-28 | Networkable appliance |
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| US10209692B2 (en) | 2014-01-20 | 2019-02-19 | Emerson Electric Co. | Selectively connecting a climate control system controller with more than one destination server |
| US9568205B2 (en) * | 2014-01-20 | 2017-02-14 | Emerson Electric Co. | Selectively connecting a climate control system controller with more than one destination server |
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| JP2000354062A (en) * | 1999-06-09 | 2000-12-19 | Nec Corp | System and method for communication |
| WO2001014990A1 (en) * | 1999-08-21 | 2001-03-01 | Webever, Inc. | Method for content delivery over the internet |
| CN1306637A (en) * | 1999-03-29 | 2001-08-01 | 精工爱普生株式会社 | Network system and network interface card |
| WO2004006529A1 (en) * | 2002-07-08 | 2004-01-15 | Siemens Aktiengesellschaft | Communication network comprising communication components having client and server functionalities and search functions |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306637A (en) * | 1999-03-29 | 2001-08-01 | 精工爱普生株式会社 | Network system and network interface card |
| JP2000354062A (en) * | 1999-06-09 | 2000-12-19 | Nec Corp | System and method for communication |
| WO2001014990A1 (en) * | 1999-08-21 | 2001-03-01 | Webever, Inc. | Method for content delivery over the internet |
| WO2004006529A1 (en) * | 2002-07-08 | 2004-01-15 | Siemens Aktiengesellschaft | Communication network comprising communication components having client and server functionalities and search functions |
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