CN102571151A - Processing method for power line communication network and central coordinator (CCo) - Google Patents
Processing method for power line communication network and central coordinator (CCo) Download PDFInfo
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- CN102571151A CN102571151A CN2011104330825A CN201110433082A CN102571151A CN 102571151 A CN102571151 A CN 102571151A CN 2011104330825 A CN2011104330825 A CN 2011104330825A CN 201110433082 A CN201110433082 A CN 201110433082A CN 102571151 A CN102571151 A CN 102571151A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
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Abstract
The invention provides a processing method for a power line communication network and a central coordinator (CCo). The method comprises the following steps that: the CCo detects the state of a proxy coordinator (PCo), wherein the state of the PCo comprises a normal state or a dropped state; and after determining that the PCo is dropped, the CCo specifies a new PCo for a hidden station corresponding to the dropped PCo. By the embodiment of the invention, the interruption of a service at the hidden station can be avoided to the greatest extent after the PCo is dropped.
Description
Technical field
The present invention relates to communication technical field, relate in particular to processing method and central coordinator in a kind of power line communication network (Central Coordinator, CCo).
Background technology
(Power Line Communication is that high-frequency signal with carrying information is loaded on the power line PLC) to power line communication, carries out transfer of data with power line.Family's broadband P LC network is a kind of network based on PLC; In each the broadband P LC of family logical network a CCo is arranged; Central coordinator can be managed whole network, like the transmission of website in the coordination network, the website of new adding network is carried out authentication, managing cryptographic keys and coordinates sharing of resource etc. with adjacent networks.In the broadband P LC of family logical network, maybe be because the message such as beacon that certain site can't listen to the CCo transmission can appear in channel condition or other factors, i.e. the hiding website of existence (Hidden Station, HSTA).Hide the website access network in order to make, CCo can (Proxy Coordinator, PCo), PCo can transmit administrative messag and broadcasting agent beacon for hidden station point in order to hide website authorized agency telegon.
When practical application; Maybe be because the user extracts socket with PCo unintentionally or the situation that PCo goes offline can appear in the PCo failure and other reasons; At this moment, for hiding website, may occur to obtain enough schedule informations and professional transmission is interrupted; Can't guarantee service quality (Quality of Service, QoS).For the application scenarios that is directed against sound, video transmission in the broadband P LC of the family logical network,, can cause relatively PCo to seriously influence after going offline to laser propagation effect.
In the prior art, after PCo went offline, the hiding website that this PCo is corresponding can be found to detect the agent beacon from this PCo.After the schedule information that hiding website obtains through agent beacon before stopped, (Proxy Station PSTA) went to carry out again related with CCo can to select other PCo or selection to act on behalf of website.CCo can find to send again the terminal equipment ID of the equipment of the message of association, and (Terminal Equipment Identifier TEI) was different from the original TEI that for this reason hides the PCo of website appointment, afterwards for hiding new PCo of website appointment.
But, be after acquired schedule information stops, just to go to carry out again related owing to hide website in the prior art with CCo, CCo just reassigns new PCo after judging then.Because closing joint conference again causes bigger time delay, in this related again process, hiding website possibly not have corresponding scheduling information; This just possibly cause professional interruption; For the audio frequency and video traffic transmission, can't guaranteed qos, cause service disconnection probably.
Summary of the invention
The embodiment of the invention provides processing method and the CCo in a kind of power line communication network, the problem that causes in order to can not in time find PCo to go offline in the solution prior art, and the timely discovery that realization goes offline to PCo guarantees that as far as possible the business of hiding website is transmitted continuous.
The embodiment of the invention provides the processing method in a kind of power line communication network, comprising:
CCo detects the state of PCo, and the state of said PCo comprises: PCo is normal, and perhaps PCo goes offline;
CCo is after definite PCo goes offline, for the corresponding hiding website of PCo that goes offline is specified new PCo.
The embodiment of the invention provides a kind of CCo, comprising:
Detection module is used to detect the state of PCo, and the state of said PCo comprises: the normal or PCo of PCo goes offline;
Designated module is used for after said detection module confirms that PCo goes offline, for the corresponding hiding website of PCo that goes offline is specified new PCo.
Can know that by technique scheme the embodiment of the invention directly detects the state of PCo by CCo, specify new PCo, can avoid hiding the big problem of the related again time-delay that causes of website, can avoid service disconnection as far as possible, improve QoS in the PCo back that goes offline.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; The accompanying drawing of required use is done an introduction simply in will describing embodiment below; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of processing method one embodiment in the power line communication network of the present invention;
Fig. 2 be the embodiment of the invention based on the protocol layer configuration diagram of HPAV system;
Fig. 3 is the structural representation of the beacon period in the embodiment of the invention;
Fig. 4 is the exemplary electrical line of force communication logic network diagram in the embodiment of the invention;
Fig. 5 is the schematic flow sheet of specifying PCo in the embodiment of the invention.
Fig. 6 is the schematic flow sheet of an embodiment of the state of definite PCo in the embodiment of the invention;
Fig. 7 is the schematic flow sheet of another embodiment of the state of definite PCo in the embodiment of the invention;
Fig. 8 is the schematic flow sheet of another embodiment of the state of definite PCo in the embodiment of the invention;
Fig. 9 is the structural representation of the embodiment of CCo of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Fig. 1 is the schematic flow sheet of processing method one embodiment in the power line communication network of the present invention, Fig. 2 be the embodiment of the invention based on family's plug-in audio frequency and video (HomePlug AV, HPAV) the protocol layer configuration diagram of system.
Referring to Fig. 2; The HPAV network is a centralized management network; A CCo is arranged in each network; Central coordinator also will be responsible for whole Network Management except as common PLC equipment, comprise that network is set up, the allocated bandwidth of website access and mandate, the whole network and scheduling of resource, with the coordination of a plurality of adjacent networks, network power management etc.
Data surface provides traditional layer-specific access, and (Convergence Layer is CL) with medium access control (Media Access Control, MAC) M1 interface between the layer and the phy interface between MAC layer and the physical layer to comprise convergence-level.At chain of command, different with traditional layering, chain of command provides the flexibility of treatment technology and Geng Gao more efficiently, through connection manager (Connection Management, CM) foundation of control connection and dismounting, channel estimating, bridge joint etc.
Connection between the website in the HPAV network is between higher layer entities, to set up, and each connection all can have a connection standard that is associated, and (Connection Specification, CSPEC), each CSPEC has comprised and connected required QoS.After the higher layer entities request connects, CM can distribute a connection ID (Connection Identifier, CID), also can confirm according to the CSPEC that higher layer entities provided to set up several links and given link ID (Link Identifier, LID).Link has two types: global link and link-local.Wherein, global link is to be set up to CCo request by CM, and CCo can (Global Link Identifier be GLID) with time division multiple access (Code Time Division Multiple Access, TDMA) distribution for global link is specified global link ID; For local link, when connection is set up can by initiate website distribute link-local ID (Local Link Identifier, LLID).
The HPAV network using is based on the channel access mechanism of beacon, and its beacon period is the twice of alternating current cycle period.Beacon has three types, is respectively: central beacon, discovery beacon and agent beacon.Wherein, central beacon is to be sent in each by CCo beacon period, and major function is to carry channel allocation information, schedule information, be used between each website of network coordination and with adjacent internetwork coordination.Find that beacon is periodically to be sent in " discovery procedure " by the site apparatus that inserts and authorized, be used to obtain network topology, and other websites can upgrade the site list of discovery that they safeguard and find network list through the discovery beacon; In addition, can make the hidden station point know beacon period structure and be associated with access network with CCo through the discovery beacon that detects other websites.Agent beacon is to be sent in each beacon period by agent coordinator (PCo), provides regularly and schedule information for hiding website.
Fig. 3 is the structural representation of the beacon period in the embodiment of the invention, and referring to Fig. 3, beacon period is the twice of alternating current cycle period; Beacon region (Beacon Region) is used to send central beacon; Can carry schedule information in central authorities' beacon, specifically can be the continuation scheduling, can be effective in continuous several beacon periods of appointment; Perhaps be the non-standing scheduling, only effective in current beacon period.(Carrier Sense Multiple Access, CSMA) zone is used for the CSMA access to Carrier Sense Multiple Access.Reserved area (Reserved Region) can be used for TDMA traffic assignments or CSMA traffic assignments.In addition, CCo can specify a GLID for each PCo, and in reserved area, distributes transmission time slot for PCo, and PCo can broadcast agent beacon in the transmission time slot of correspondence.As PCo when being a plurality of, CCo is that the transmission time slot that distributes of each PCo is different.
Under above-mentioned framework, referring to Fig. 1, present embodiment comprises:
Step 11:CCo detects the state of PCo, and the state of said PCo comprises: PCo is normal, and perhaps PCo goes offline;
Step 12:CCo is after definite PCo goes offline, for the corresponding hiding website of PCo that goes offline is specified new PCo.
Particularly, for PCo, if normally then can in beacon period, broadcast agent beacon, if in certain beacon period, CCo does not receive the agent beacon of PCo, and then this PCo possibly go offline; Perhaps, also possibly normally broadcast agent beacon by PCo, but owing to reason CCo such as channel conditions do not receive.Therefore, CCo does not receive the agent beacon that certain or some PCo broadcast in certain beacon period, can take measures further to confirm whether this or these PCo goes offline.Concrete measure can be only to adopt broadcast mode, only adopt mode of unicast, and perhaps broadcast mode and mode of unicast combine.Particular content can be referring to the subsequent implementation example.
After definite PCo went offline, CCo can be the corresponding new PCo of hidden station point selection of PCo that goes offline according to topology table, specifies afterwards again.
For example, referring to Fig. 4, Fig. 4 is the exemplary electrical line of force communication logic network diagram in the embodiment of the invention, and website H wherein (STA H) is CCo, and website D (STA D), website E (STA E) hide website.Can adopt following mode is hidden station point selection PCo:
CCo in each network can preserve a topology table, can preserve the site list of discovery of each website in this topology table and find network list, and is as shown in table 1.CCo can confirm to hide website, select only PCo, set up agency network etc. according to topology table.
Table 1
CCo can find out its total website, and the ability that combines website to serve as PCo be confirmed only PCo through the site list of discovery of contrast self and hiding website.For example, referring to table 1, the website of discovery of CCo comprises: A, B, C, F, G; The website of discovery of hiding website D comprises: B, C, F, E; The website of discovery of hiding website E comprises: A, B, D, for hiding website D, can select to have the PCo of the website of PCo ability as D in B, C, F; For hiding website E; Can in A, B, select to have the PCo of the website of PCo ability as E, if website B has the ability of serving as PCo, then CCo can select the PCo as website D and website E with website B.
In addition, above-mentioned topology table can also find to hide the foundation of website as CCo, for example, does not have certain website in the website of discovery of CCo, and this website is arranged in the website of discovery of all the other websites, and then this website is exactly to hide website for CCo.
Further, the mode of above-mentioned selection PCo goes for initial selected and selects, and can confirm according to the result of initial selected the corresponding hiding website of PCo once more.For example, CCo confirms that when initial website D, website E are hiding website, and for the PCo of website D and website E selection is website B, the hiding website that PCo (website B just) is corresponding so is exactly website D and website E.Afterwards,, still can adopt website B aforesaid way to reselect PCo after going offline.
After selecting to obtain PCo, can adopt following mode to specify, referring to Fig. 5, Fig. 5 is the schematic flow sheet of specifying PCo in the embodiment of the invention, comprising:
Step 51:CCo sends to new PCo and acts on behalf of specified request message;
Wherein, this is acted on behalf of in specified request (CP_PROXY_APPOINT.REQ) message and comprises the ReqType field, and the value of this ReqType field is Add, and implication is for specifying new PCo.
Step 52: after new PCo confirms to accept proxy role according to s own situation, send the agency to CCo and specify acknowledge message.
Wherein, this agency specifies and confirms that (CP_PROXY_APPOINT.CNF) message informing CCo has accepted proxy role.
Step 53: new PCo sends to hiding website and acts on behalf of specified notification message;
Wherein, this is acted on behalf of specified notification (PH_PROXY_APPOINT.IND) message and informs that hiding this PCo of website is responsible for as its agent coordinator.
Present embodiment directly detects the state of PCo by CCo, specifies new PCo in the PCo back that goes offline, and can avoid hiding the big problem of the related again time-delay that causes of website, can avoid service disconnection as far as possible, improves QoS.
Fig. 6 is the schematic flow sheet of an embodiment of the state of definite PCo in the embodiment of the invention, and present embodiment is confirmed with mode of unicast.Referring to Fig. 6, present embodiment comprises:
Step 61:CCo sends unicast messages to a PCo;
Wherein, if in certain beacon period, CCo does not receive the agent beacon that certain or some PCo broadcast, and then this or these PCo is exactly an above-mentioned PCo.
In addition, this unicast messages can be CP_PROXY_APPOINT.REQ message, and different with existing CP_PROXY_APPOINT.REQ message is that the value of the ReqType of the CP_PROXY_APPOINT.REQ message in the present embodiment is elected 0x04 as, increases newly.Table 2 has provided the signal of CP_PROXY_APPOINT.REQ message:
Table 2
Table 3 is the signal of ReqType field:
Table 3
Different with prior art is, the value of ReqType of the prior art has only 0x00 to 0x03, and all the other are for reserving, and will increase a value that is used to inquire in the present embodiment, representes with 0x04.
In addition, the implication of the HSTA STATE in the table 2 can be referring to table 4:
Table 4
Step 62: a PCo responds or does not respond according to s own situation.
Particularly,, then send unicast messages corresponding response message,, then do not respond if a PCo goes offline to CCo if a PCo is normal.
The response message of this unicast messages can be CP_PROXY_APPOINT.CNF, and the form of this response message can be as shown in table 5:
Table 5
Different with prior art is, the value of Result field of the prior art has only 0x00 and 0x01, and all the other are for reserving, and will increase a corresponding value of inquiring in the present embodiment, representes with 0x02.
If step 63:CCo does not receive unicast messages corresponding response message in the preset time; Then retransmit unicast messages until receiving response message; Perhaps reach preset number of times; After the transmission number of times of unicast messages reaches preset number of times and do not receive response message, confirm that a PCo goes offline.
Wherein, this preset time, preset number of times can be set according to actual conditions.In addition, if only confirm according to once unicast case, then above-mentioned preset number of times is appreciated that to once.
Need to prove that an above-mentioned PCo can be one or at least two, because the equipment that goes offline is generally 1; With 1 is example; For example this PCo that goes offline is website A, then sends unicast messages to website A, and behind the response message of not receiving website A, retransmits unicast messages; If the number of retries of unicast messages reaches the response message of still not receiving website A behind the number of times of setting, show that then website A goes offline.
Certainly, an above-mentioned PCo also can be at least two, for example comprises website A and website B; Then CCo sends unicast messages respectively to website A and website B, if in number of retries, receive the response message of website A, and does not receive the response message of website B; Show that then website A is normal, website B goes offline; If in number of retries, receive the response message of website B, and do not receive the response message of website A, show that then website B is normal, website A goes offline; If in number of retries, all do not receive the response message of website A and website B; Show that then website A and website B all go offline,, show that then website A and website B are normal if all receive the response message of website A and website B in the number of retries.Handling process for a PCo of all the other numbers can be consulted and carried out.
Optional, above-mentioned unicast messages and response message obtain after existing message is expanded, and also can carry out the clean culture inquiry through newly-increased message.For example, above-mentioned unicast messages is CP_INQUIRE.REQ, and response message is CP_INQUIRE.RSP, and CP_INQUIRE.REQ and CP_INQUIRE.RSP are the message that increases newly.
The form of CP_INQUIRE.REQ message can be referring to table 6, and the form of CP_INQUIRE.RSP message can be referring to table 7:
Table 6
Table 7
Present embodiment can be realized confirming the state of PCo by CCo to existing unicast messages added word segment value or newly-increased unicast messages, and then found that in time PCo goes offline to guarantee professional not interrupting as far as possible.
Fig. 7 is the schematic flow sheet of another embodiment of the state of definite PCo in the embodiment of the invention, and present embodiment is confirmed with broadcast mode.Referring to Fig. 7, present embodiment comprises
Step 71:CCo sends broadcast to the whole network, comprises the information of a PCo in this broadcast;
Wherein, if in certain beacon period, CCo does not receive the agent beacon that certain or some PCo broadcast, and then this or these PCo is exactly an above-mentioned PCo.
This broadcast is the message that increases newly, can be called " CM_EVALUATE.REQ " message.The form of CM_EVALUATE.REQ message is as shown in table 8:
Table 8
Above-mentioned field PCo TEI [1] to PCo TEI [N] be exactly the information of a PCo.
The implication of ReqType wherein can be as shown in table 9:
Table 9
Step 72: the website in the whole network responds or does not respond according to s own situation.
For any one the one PCo; If self is normal, then respond, comprise the information of self in the response message; Perhaps; If self is normal and in this beacon period, also receive the agent beacon that all the other PCo broadcast, then also respond, comprise the information and the information that receives a PCo of agent beacon of self in the response message.
For the arbitrary website outside the PCo; A just non-PCo; If it receives the PCo of the information indication of the PCo that comprises in the CM_EVALUATE.REQ message in this beacon period, just the agent beacon of a PCo then responds; And comprise the information of a PCo who receives agent beacon in the response message, otherwise do not respond.
Above-mentioned response message can be called CM_EVALUATE.RSP message, and message format can be as shown in table 10:
Table 10
Step 73:CCo will not receive that a PCo of corresponding response message confirms as the PCo that goes offline in the time of setting.
Wherein, through the broadcasting flow process, possibly in response message, comprise the information of certain or some PCo, the agent beacon of this or these PCo possibly is not the relatively poor or burst noise interference of channel conditions etc. by the CCo uppick.For example; The one PCo comprises website A and website B, and after the broadcasting flow process, a certain website has been received the agent beacon of website B in this beacon period; Then this website can send the response message of the information that comprises website B to CCo, and then CCo can confirm that website B is normal after receiving this response message; If have no a website to send the response message of the information that comprises website A, that is to say the response message of not receiving corresponding website A, then CCo confirms that website A goes offline.
Further, present embodiment also can similar processing to unicast messages, can re-transmit broadcast messages, if in preset number of times, all do not receive one or more PCo corresponding response message, confirm that then a corresponding PCo goes offline.
Present embodiment is carried in the broadcast through the information with a PCo, and the whole network website is handled according to s own situation, can realize being confirmed by CCo the state of PCo, and then finds that in time PCo goes offline to guarantee professional not interrupting as far as possible.Present embodiment can improve the reliability that the PCo state is judged through broadcast mode.
Above-mentioned mode of unicast and the broadcast mode described respectively also can combine both, at this moment, can be to broadcast clean culture more earlier, also can be that first clean culture is broadcasted again.Specific as follows stating shown in the embodiment.
Fig. 8 is the schematic flow sheet of another embodiment of the state of definite PCo in the embodiment of the invention, and present embodiment is an example to broadcast clean culture more earlier.Referring to Fig. 8, present embodiment comprises:
Step 81:CCo sends broadcast to the whole network, comprises the information of a PCo in this broadcast;
Step 82: the website in the whole network responds or does not respond according to s own situation.
The content of step 81-82 can be specifically referring to the content of step 71-72.
Step 83:CCo sends unicast messages to the 2nd PCo.
Wherein, the 2nd PCo is meant a PCo who does not receive corresponding response message through broadcasting after the flow process, the as above example among the embodiment, and website B is exactly the 2nd PCo.Certainly, the number of the 2nd PCo also can be a plurality of.
Step 84: the 2nd PCo responds or does not respond according to s own situation.
If step 85:CCo does not receive unicast messages corresponding response message in the preset time; Then retransmit unicast messages until receiving response message; Perhaps reach preset number of times; After the transmission number of times of unicast messages reaches preset number of times and do not receive response message, confirm that the 2nd PCo goes offline.
Above-mentioned step 83-85 can be referring to the handling process of step 61-63 to a PCo to the handling process of the 2nd PCo.
Optional, the unicast messages that adopts in the present embodiment can be the message behind the new field value of increase, can be the message that increases newly, the message of two kinds of forms that adopt among the embodiment as shown in Figure 6.
Optional, the unicast messages that adopts in the present embodiment also can be identical with above-mentioned broadcast.That is the information that, can comprise all PCo in the unicast messages.Perhaps, further, unicast messages adopts the field of broadcast still only to comprise the information of all the 2nd PCo.Perhaps, further, but unicast messages adopts the field of broadcast only comprises the information of self corresponding PCo.For example; The one PCo comprises website A, website B and website C, and the 2nd PCo comprises website A and website B, then in the unicast messages that website A, website B send, can all comprise the information of website A, the information of website B and the information of website C; Also can all comprise the information of website A and the information of website B; Perhaps, also can be the information that in the unicast messages that website A sends, only comprises website A, in the unicast messages that website B sends, only comprise the information of website B.
Optional, above-mentioned is the mode of broadcasting clean culture more earlier, also can be the mode that first clean culture is broadcasted again.At this moment; Can adopt mode of unicast to determine the 3rd PCo, the 3rd PCo is meant through not receiving a PCo of response message after the clean culture flow process, for example; The one PCo comprises website A and website B; Through after the clean culture flow process, received the response message of website B and do not received the response message of website A that then the 3rd PCo is exactly website A.Afterwards, the handling process of similar step 71-73, different is; The information of carrying in the broadcast of this moment is at least the information of the 3rd PCo; Being the information of the 3rd PCo for example, also can be the information of a PCo, and the PCo that does not have corresponding response message among the 3rd PCo is confirmed as the PCo that goes offline.The unicast messages type that the type of the unicast messages that adopts this moment further, adopts in the time of also can broadcasting the back clean culture referring to above-mentioned elder generation.
Present embodiment can further improve the accuracy of detection through the mode that broadcasting and clean culture combine, and then finds that in time PCo goes offline to guarantee professional not interrupting as far as possible.
Fig. 9 is the structural representation of the embodiment of CCo of the present invention, comprises detection module 91 and designated module 92; Detection module 91 is used to detect the state of PCo, and the state of said PCo comprises: PCo is normal, and perhaps PCo goes offline; Designated module 92 is used for after said detection module 91 confirms that PCo goes offline, for the corresponding hiding website of PCo that goes offline is specified new PCo.
Optional, said detection module specifically is used for: send unicast messages to a PCo, wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period; In Preset Time, do not receive said response message, then retransmit said unicast messages until receiving response message or reaching preset number of times from a said PCo; After the transmission number of times of unicast messages reaches preset number of times and do not receive response message, confirm that a PCo goes offline.
Optional, said detection module specifically is used for: to the broadcast that the whole network sends set point number, comprise the information of a PCo in the said broadcast, wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period; To in time of setting and set point number, both not receive response message from a PCo; Do not receive response message from a non-PCo yet; Then a PCo is confirmed as the PCo that goes offline; Wherein, if a non-PCo in said beacon period, receive the agent beacon of PCo broadcasting then send response message to CCo.
Optional, said detection module specifically is used for: send broadcast to the whole network, comprise the information of a PCo in the said broadcast, wherein, said CCo does not receive the PCo of the agent beacon of said PCo broadcasting in a beacon period; In the time of setting, both do not received the response message of a PCo; When not receiving the response message from a non-PCo yet; Send unicast messages to a PCo; Wherein, if a non-PCo in said beacon period, receive the agent beacon of PCo broadcasting then send response message to CCo; In Preset Time, do not receive the response message of a said PCo, then retransmit said unicast messages until receiving response message or reaching preset number of times; After the transmission number of times of unicast messages reaches preset number of times and do not receive response message, confirm that a PCo goes offline.Further, a PCo who receives unicast messages can be complete or collected works or the subclass of the corresponding PCo of the information of the PCo that comprises in the broadcast.For example, what comprise in the broadcast is the information of website A and website B, and after the broadcasting flow process, possible website A has fed back response message, can only unicast messages be sent to website B so afterwards, and no longer send to website A.
Optional, said detection module specifically is used for: send unicast messages to a PCo, wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period; In Preset Time, do not receive response message, then retransmit said unicast messages until receiving response message or reaching preset number of times from a PCo; After the transmission number of times of unicast messages reaches preset number of times and does not receive response message, send broadcast to the whole network, comprise the information of a PCo in this broadcast at least; In the time of setting, both do not received the response message of a PCo; When not receiving the response message from a non-PCo yet; The one PCo confirmed as go offline, wherein, if a non-PCo receives the agent beacon of PCo broadcasting then sends response message to CCo in said beacon period.Further, the corresponding PCo of the information of a PCo who comprises in the broadcast can be complete or collected works or the subclass that receives a PCo of unicast messages.For example, at first send unicast messages to website A and website B, after the clean culture flow process, possible website A has fed back response message, can a packets of information with website B be contained in the broadcast after so, and no longer comprises the information of website A.
Optional, said designated module specifically is used for: according to topology table is the new PCo of said hidden station point selection; Act on behalf of specified request message to said new PCo transmission; Receive the agency that said new PCo sends and specify acknowledge message after accepting proxy role.
Above-mentioned unicast messages can be message or the message for increasing newly that comprises extended field.
Present embodiment directly detects the state of PCo by CCo, specifies new PCo in the PCo back that goes offline, and can avoid hiding the big problem of the related again time-delay that causes of website, can avoid service disconnection as far as possible, improves QoS.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (13)
1. the processing method in the power line communication network is characterized in that, comprising:
Central coordinator CCo detects the state of agent coordinator PCo, and the state of said PCo comprises: PCo is normal, and perhaps PCo goes offline;
CCo is after definite PCo goes offline, for the corresponding hiding website of PCo that goes offline is specified new PCo.
2. method according to claim 1 is characterized in that, said CCo detects the state of PCo, comprising:
CCo sends unicast messages to a PCo, and wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period;
If CCo does not receive the response message from a said PCo in Preset Time, then retransmit said unicast messages until receiving response message or reaching preset number of times;
CCo confirms that a PCo goes offline after the transmission number of times of unicast messages reaches preset number of times and do not receive response message.
3. method according to claim 1 is characterized in that, said CCo detects the state of PCo, comprising:
CCo comprises the information of a PCo to the broadcast that the whole network sends set point number in the said broadcast, wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period;
If CCo had not both received the response message from a PCo in time of setting and set point number; Do not receive response message from a non-PCo yet; Then a PCo is confirmed as and go offline; Wherein, if a non-PCo in said beacon period, receive the agent beacon of PCo broadcasting then send response message to CCo.
4. method according to claim 1 is characterized in that, said CCo detects the state of PCo, comprising:
CCo sends broadcast to the whole network, comprises the information of a PCo in the said broadcast, and wherein, said CCo does not receive the agent beacon of said PCo broadcasting in a beacon period;
If CCo had not both received the response message of a PCo in the time of setting; Do not receive response message from a non-PCo yet; Then CCo sends unicast messages to a PCo; Wherein, if a non-PCo in said beacon period, receive the agent beacon of PCo broadcasting then send response message to CCo;
If CCo does not receive the response message of a said PCo in Preset Time, then retransmit said unicast messages until receiving response message or reaching preset number of times;
CCo confirms that a PCo goes offline after the transmission number of times of unicast messages reaches preset number of times and do not receive response message.
5. method according to claim 1 is characterized in that, said CCo detects the state of PCo, comprising:
CCo sends unicast messages to a PCo, and wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period;
If CCo does not receive the response message from a PCo in Preset Time, then retransmit said unicast messages until receiving response message or reaching preset number of times;
CCo sends broadcast to the whole network after the transmission number of times of unicast messages reaches preset number of times and do not receive response message, comprise the information of a PCo in this broadcast at least;
If CCo had not both received the response message of a PCo in the time of setting; Do not receive response message from a non-PCo yet; Then a PCo is confirmed as and go offline; Wherein, if a non-PCo in said beacon period, receive the agent beacon of PCo broadcasting then send response message to CCo.
6. according to each described method of claim 1-5, it is characterized in that said is that the corresponding hiding website of PCo that goes offline is specified new PCo, comprising:
According to topology table is the new PCo of said hidden station point selection;
Act on behalf of specified request message to said new PCo transmission;
Receive the agency that said new PCo sends and specify acknowledge message after accepting proxy role.
7. according to claim 2,4 or 5 described methods, it is characterized in that said unicast messages is to comprise the message of extended field or be newly-increased message.
8. a central coordinator CCo is characterized in that, comprising:
Detection module is used to detect the state of agent coordinator PCo, and the state of said PCo comprises: the normal or PCo of PCo goes offline;
Designated module is used for after said detection module confirms that PCo goes offline, for the corresponding hiding website of PCo that goes offline is specified new PCo.
9. CCo according to claim 8 is characterized in that, said detection module specifically is used for:
Send unicast messages to a PCo, wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period;
In Preset Time, do not receive said response message, then retransmit said unicast messages until receiving response message or reaching preset number of times from a said PCo;
After the transmission number of times of unicast messages reaches preset number of times and do not receive response message, confirm that a PCo goes offline.
10. CCo according to claim 8 is characterized in that, said detection module specifically is used for:
To the broadcast that the whole network sends set point number, comprise the information of a PCo in the said broadcast, wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period;
To in time of setting and set point number, both not receive response message from a PCo; Do not receive response message from a non-PCo yet; Then a PCo is confirmed as the PCo that goes offline; Wherein, if a non-PCo in said beacon period, receive the agent beacon of PCo broadcasting then send response message to CCo.
11. CCo according to claim 8 is characterized in that, said detection module specifically is used for:
Send broadcast to the whole network, comprise the information of a PCo in the said broadcast, wherein, said CCo does not receive the PCo of the agent beacon of said PCo broadcasting in a beacon period;
In the time of setting, both do not received the response message of a PCo; When not receiving the response message from a non-PCo yet; Send unicast messages to a PCo; Wherein, if a non-PCo in said beacon period, receive the agent beacon of PCo broadcasting then send response message to CCo;
In Preset Time, do not receive the response message of a said PCo, then retransmit said unicast messages until receiving response message or reaching preset number of times;
After the transmission number of times of unicast messages reaches preset number of times and do not receive response message, confirm that a PCo goes offline.
12. CCo according to claim 8 is characterized in that, said detection module specifically is used for:
Send unicast messages to a PCo, wherein, said CCo does not receive the agent beacon of PCo broadcasting in a beacon period;
In Preset Time, do not receive response message, then retransmit said unicast messages until receiving response message or reaching preset number of times from a PCo;
After the transmission number of times of unicast messages reaches preset number of times and does not receive response message, send broadcast to the whole network, comprise the information of a PCo in this broadcast at least;
In the time of setting, both do not received the response message of a PCo; When not receiving the response message from a non-PCo yet; The one PCo confirmed as go offline, wherein, if a non-PCo receives the agent beacon of PCo broadcasting then sends response message to CCo in said beacon period.
13. each described CCo is characterized in that according to Claim 8-12, said designated module specifically is used for:
According to topology table is the new PCo of said hidden station point selection;
Act on behalf of specified request message to said new PCo transmission;
Receive the agency that said new PCo sends and specify acknowledge message after accepting proxy role.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110433082.5A CN102571151B (en) | 2011-12-21 | 2011-12-21 | Processing method for power line communication network and central coordinator (CCo) |
| PCT/CN2012/085437 WO2013091468A1 (en) | 2011-12-21 | 2012-11-28 | Processing method and cco in power line communication network |
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| CN201110433082.5A CN102571151B (en) | 2011-12-21 | 2011-12-21 | Processing method for power line communication network and central coordinator (CCo) |
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| Publication number | Publication date |
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| CN102571151B (en) | 2014-08-20 |
| WO2013091468A1 (en) | 2013-06-27 |
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