CN101656665A - Data transmission method and device of coaxial Ethernet system - Google Patents
Data transmission method and device of coaxial Ethernet system Download PDFInfo
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- CN101656665A CN101656665A CN200910093217A CN200910093217A CN101656665A CN 101656665 A CN101656665 A CN 101656665A CN 200910093217 A CN200910093217 A CN 200910093217A CN 200910093217 A CN200910093217 A CN 200910093217A CN 101656665 A CN101656665 A CN 101656665A
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Abstract
The present invention provides a data transmission method and device of a coaxial Ethernet system. A. a first coaxial network unit (CNU) broadcasts and transmits a link status inquiry message, and determines an optimum link and a suboptimum link from a first CNU to a CLT according to the link status information responded by the coaxial line terminal (CLT) and each CNU; B. the first CNU transmits aregistration message or forwards a request message to a next-hop node in the optimum link, if the next-hop node is CNU, the next-hop node establishes a forwarding list containing the first CNU node identification for forwarding the data messages of the first CNU; C. the first CNU transmits the data messages by using the optimum link; D. if the first CNU detects that the optimum link is fault, thefirst CNU judges whether there is a suboptimum link or not, if yes, the suboptimum link will be switched as the optimum link, then turning to the step B; otherwise, turning to the step A. The invention is capable of improving the reliability of the system.
Description
Technical field
The present invention relates to network communications technology field, data transmission method and device in particularly a kind of coaxial Ethernet (EOC) system.
Background technology
In coaxial Ethernet (EOC, the Ethernet On Coaxial-cable) system, adopt coaxial cable to carry out the Ethernet data transmission, can provide return path for the bi-directional digital television platform.
A typical EOC system is made up of coaxial line terminal (CLT, Coax LineTerminal), coaxial network unit (CNU, Coax Network Unit) and coaxial distribution network as shown in Figure 1 usually.Wherein, CLT can be positioned at corridor or optical node position, sub-district; CNU can be positioned at user's family and serve as ustomer premises access equipment and come access user terminal, perhaps integrates in products such as corridor switches, serves as the upstream Interface of corridor switch; Coaxial distribution network is the network from optical node to user's family between CLT and CNU, except coaxial cable, can also include equipment such as source amplifier, branch distributor.
In the prior art, when carrying out transmitting uplink data, CNU sends the data message that purpose is designated the identifier of CLT, this data message can make other CNU also can receive this data message through in the coaxial distribution network such as equipment such as distributors, and it is not the data message of self that other CNU can abandon the purpose sign.When same CLT sends datagram to certain purpose CNU, can be transferred to each CNU through coaxial distribution network, can to abandon the purpose sign be not the data message of self to other CNU equally.
Yet,, then can't carry out data communication between this CNU and the CLT if the link between certain CNU and the CLT breaks down.
Summary of the invention
In view of this, the invention provides data transmission method and device in a kind of EOC system, so that avoid improving the reliability of EOC system owing to can't carry out data communication between this CNU that the link failure between CNU and the CLT causes and the CLT.
Data transmission method in a kind of coaxial Ethernet system, this method comprises:
A, a CNU broadcast transmission link state inquiry message, the link-state information of utilizing CLT and each CNU to reply is determined optimum link and the suboptimum link of a described CNU to described CLT;
B, the described CNU next-hop node on optimum link sends logon message or transmits request message, if described next-hop node is CNU, then described next-hop node is set up the forwarding-table item that comprises a CNU node identification and is used to carry out data message forwarding at a CNU;
C, a described CNU utilize optimum link to carry out the transmission of data message;
If D the one CNU detects optimum link and breaks down, judge the current suboptimum link that whether exists, if, be optimum link then with the suboptimum link switchover, go to step B; Otherwise, go to steps A.
A kind of coaxial network unit CNU, this CNU comprises: packet sending and receiving unit, link determining unit and fault processing unit;
Described packet sending and receiving unit is used for broadcast transmission link state inquiry message; Receive the link-state information that CLT and each CNU reply; After the link determining unit was determined optimum link or switched optimum link, the next-hop node on optimum link sent logon message or transmits request message; Utilize optimum link to carry out the transmission of data message;
Described link determining unit, the link-state information that is used to utilize described CLT and each CNU to reply is determined self place CNU optimum link and suboptimum link to described CKT; After receiving switching notice, be optimum link with the suboptimum link switchover;
Described fault processing unit, when being used to detect optimum link and breaking down, judge the current suboptimum link that whether exists, if, send switching notice to described link determining unit, and trigger next-hop node transmission logon message or the forwarding request message of described packet sending and receiving unit on optimum link; Otherwise, trigger described packet sending and receiving cell broadcast and send the link state inquiry message.
As can be seen from the above technical solutions, CNU can be by the mode collection of link state information of broadcasting link status poll message among the present invention, thereby determine optimum link and the suboptimum link of this CNU to CLT, and on next-hop node, set up forwarding-table item to the mode that the next-hop node on the optimum link sends logon message or transmits request message, the message that makes CNU send to CLT can be transmitted by the next-hop node of optimum link; When optimum link breaks down, can be optimum link with the suboptimum link switchover, even if there is not the suboptimum link can carry out determining of optimum link and suboptimum link again yet, thereby guarantee when certain link breaks down, CNU also can carry out data communication by other link and CLT, thereby has improved the reliability of EOC system.
Description of drawings
Fig. 1 is an EOC system configuration schematic diagram of the prior art;
Fig. 2 is a main method flow chart of the present invention;
The EOC system example figure that Fig. 3 provides for the embodiment of the invention;
The detailed method flow chart that Fig. 4 provides for the embodiment of the invention;
The structural representation of the CNU that Fig. 5 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Fig. 2 is a main method flow chart provided by the invention, and as shown in Figure 2, method provided by the invention mainly may further comprise the steps:
Step 201: a CNU broadcast transmission link state inquiry message, the link-state information of utilizing CLT and each CNU to reply is determined optimum link and the suboptimum link of a CNU to CLT.
Step 202: the next-hop node of a CNU on optimum link sends logon message or transmits request message, if this next-hop node is CNU, then this next-hop node is set up the forwarding-table item that comprises a CNU node identification and is used to carry out data message forwarding at a CNU.
Step 203: a CNU utilizes optimum link to carry out the transmission of data message.
Step 204: break down if a CNU detects optimum link, judge currently whether have the suboptimum link,, go to step 202 if be optimum link then with the suboptimum link switchover; If not, go to step 201.
Below in conjunction with specific embodiment said method is described in detail, this embodiment is an example with framework shown in Figure 3, the detailed method flow chart that Fig. 4 provides for the embodiment of the invention, and as shown in Figure 4, this method can may further comprise the steps:
Step 401:CNU1 broadcast transmission link state inquiry message.
If CNU1 powers on for the first time or restarts situation, perhaps follow-up relate to do not have to switch to the suboptimum link of optimum link the time, all can carry out the operation that sends the link state inquiry message.
The link-state information that step 402:CNU1 utilizes CLT and other each CNU to reply is determined optimum link and the suboptimum link of this CNU1 to CLT.
In this step, the CLT and the CNU that receive the link state inquiry message all can reply link-state information, this link-state information is to send the link-state information of the node of this link-state information to CLT, and this node that sends this link-state information can be CLT or CNU.Except comprising the node identification that sends link-state information, can also comprise in this link-state information: the node that sends this link-state information is to the optimum link dampening information of CLT and at least one in the jumping figure information.
If receiving the node of link query message is CLT, then the optimum link dampening information in the link-state information of CLT answer is 0, and jumping figure information is 1.
CNU1 can only utilize the optimum link dampening information that carries in the link-state information that receives to determine optimum link, for example, can be with CNU1 to the link of the link attenuation minimum of CLT as optimum link, inferior little as the suboptimum link, be specifically as follows: if the optimum link of carrying in the link-state information that certain CNU sends decay and the link attenuation sum minimum of CNU1 to this CNU, then CNU1 will point to the link of CLT as optimum link via this CNU.Also can only utilize the jumping figure information of the optimum link of carrying in the link-state information that receives to determine optimum link, for example, if the jumping figure information minimum of carrying in the link-state information that certain CNU sends, then CNU1 will point to the link of CLT as optimum link via this CNU, if the jumping figure information of carrying in the link-state information that certain CNU sends is inferior little, then CNU1 will be pointed to the link of CLT as the suboptimum link via this CNU.Also can determine optimum link in conjunction with optimum link dampening information and jumping figure information.
Need to prove, optimum link of determining or suboptimum link may be the links that CNU1 directly points to CLT, it also may be CNU1 points to CLT via another one CNU link, also may be the link of CNU1 via other a plurality of CNU sensing CLT, for example CNU1 points to the link of CLT via CNU2 and CNU3.
Below to determine that in conjunction with optimum link dampening information and jumping figure information the mode of optimum link describes, CNU1 can determine respectively that the optimum link dampening information A1 that carries in the link query message that each node returns and this CNU1 to the link attenuation information A 2 of this node, calculate the link weight Q of each node as next jumping.Can for: when L is 1 or 2,
Wherein, the jumping figure information of carrying in the link query message that L returns for this node; When L greater than 2 the time, Q=0.
The link that the Q value is maximum is as optimum link, and is inferior big as the suboptimum link.If CNU1 is via the link weight minimum of CNU2 sensing CLT, CNU1 is inferior little via the link weight that CNU3 points to CLT, and then as optimum link, CNU1 points to the link of CLT as the suboptimum link via CNU3 to CNU1 via the link of CNU2 sensing CLT.
At this moment, CNU1 is recorded as next-hop node on the optimum link with CNU2.
The next-hop node of step 403:CNU1 on optimum link sends logon message.
Because CNU is except can carrying out the determining of optimum link when initially powering on, also can when not having to switch to the suboptimum link of optimum link, carry out determine (this situation will relate to) of optimum link in subsequent descriptions, and CNU1 has finished registration in the later case, therefore, after CNU1 finishes determining of optimum link at every turn, can judge at first whether self has finished registration, if not, then the next-hop node on optimum link sends logon message; If then the next-hop node on optimum link sends and transmits request message.In this step, CNU1 determines self not finish registration as yet, therefore, sends logon message.
Step 404: after the next-hop node on the optimum link received this logon message, the forwarding-table item of setting up the node identification comprise CNU1 was used for follow-uply carrying out data message forwarding at CNU1, and this logon message is transmitted to CLT.
Because the purpose of logon message is designated the node identification of CLT, therefore, after CNU2 receives logon message, can at first set up forwarding-table item according to the source node sign of logon message, this forwarding-table item can comprise source node sign and the interface that receives this logon message.
CLT registers CNU1 after receiving this logon message.CLT determines that the CNU1 that succeeds in registration is the equipment in this EOC system, and this CNU1 is managed.After CNU1 succeeds in registration, continue to carry out following steps.
Step 405:CNU1 utilizes optimum link to carry out the transmission of data message.
Be that CNU1 utilizes the link via CNU2 sensing CLT to carry out the transmission of data message.
Data message transmission in this step can be adopted multiple mode, lists wherein two kinds below:
First kind of mode: CNU1 sends the data message that destination node is designated the node identification of CLT, after other CNU receives this data message, the source node of determining this data message is CNU1, if the local forwarding-table item that has the node identification that comprises this CNU1, then give CLT with this data message forwarding, otherwise, abandon this data message; CLT sends the data message that destination node is designated CNU1, after other CNU receives this data message, if the local forwarding-table item that has the node identification that comprises this CNU1 is then given CNU1 with this data message forwarding.
The second way: CNU1 is when sending datagram to CLT, the destination node sign of data message is set to the next-hop node sign on the optimum link, in data message, increase by one in addition and transmit identification field, carry final node identification in this forwarding identification field, i.e. the sign of CLT.
After next jumping CNU on the optimum link that CNU1 determines receives data message, if the source node of this data message is CNU1, destination node is self and transmits the sign of carrying CLT in the identification field, further judge the local forwarding-table item that comprises the CUN1 node identification that whether exists, if, the source node sign of this data message is revised as self node identification, the destination node sign is revised as the node identification of CLT, transmit the node identification that is revised as CNU1 in the identification field, then, utilize the list item that comprises this data message source node sign of local storage, this data message is transmitted to CLT according to self to the optimum link of CLT; If not, abandon this data message.
After CLT receives data message, can carry out record to this optimum link, for example the link record forward node to CNU1 is CNU2, and this record can upgrade in time according to the switching of optimum link.Data message for the CLT answer, source node is CLT, destination node is the forward node of record, transmit the node identification that carries CNU1 in the identification field, after each CNU receives data message, if the source node of this data message is CLT, destination node is the sign of whether carrying CNU1 in self and the Data Identification field, then judge the local forwarding-table item that comprises the CNU1 node identification that whether exists, if, then source node is revised as self, destination node is revised as CNU1, transmit identification field and do not carry any sign, utilize the forwarding-table item that comprises this data message destination node sign of local storage, give CNU1 data message forwarding; Otherwise abandon this data message.
If the destination address of the data message that each CNU receives is not self, then directly abandon this data message.
If the destination address of the data message that each CNU receives be self and when transmitting identification field and not carrying any sign, illustrate that this data message sends to self, no longer transmits this data message.
This second way is mainly used in the situation that there is double bounce at most in optimum link that CNU points to CLT.
Step 406:CNU1 carries out fault detect to the next-hop node on the optimum link.
CNU1 can periodically send the survival detection messages to CNU2, if do not receive the survival response message that CNU2 sends in setting-up time, then determines current active link fault.For example, CNU1 can each 5s send a survival detection messages, if send 2 times continuously, does not promptly all receive the survival response message that CNU2 replys in 10s, then thinks current optimum link fault.
Step 407:CNU1 determines the current suboptimum link that exists, and is optimum link with the suboptimum link switchover then.
Be about to link that CNU1 points to CLT via CNU3 as optimum link, and the next-hop node on the optimum link is revised as CNU3.
CNU1 at first judges the current suboptimum link that whether exists after detecting optimum link and breaking down, if exist, be optimum link with the suboptimum link switchover then; If there is no, then carry out the definite of optimum link and suboptimum link again, this situation will relate in subsequent descriptions.
After the optimum link switching is finished, just CNU1 begins CNU3 is carried out fault detect, promptly send the survival detection messages, in setting-up time, reply the survival response message if determine CNU3, then definite CNU3 is normal, can continue execution in step 408; Otherwise can go to step 412.
The next-hop node of step 408:CNU1 on optimum link sends transmits request message.
CNU1 sends to CNU3 and transmits request message; Here, transmit request message and can comprise actual packet waiting for transmission.
Step 409: after the next-hop node on the optimum link received and transmits request message, the forwarding-table item of setting up the node identification that comprises CNU1 was used for follow-uply carrying out data message forwarding at CNU1.
After CNU3 receives the forwarding request message of CNU1 transmission, set up the forwarding-table item of the node identification that comprises CNU1.
Step 410:CNU1 utilizes optimum link to carry out the transmission of data message.
At this moment, optimum link switches to CNU1 points to CLT via CNU3 link.The mode that CNU3 transmits the data message can be described in step 405.
Step 411: if CNU1 carries out fault detect to the next-hop node on the optimum link, and detect fault, then determine current optimum link fault.
Step 412:CNU1 determines the current suboptimum link that do not existed, and then broadcasting link status poll message is determined optimum link and suboptimum link, i.e. mode described in step 401 and the step 402 again.
Because the suboptimum link switchover is not had the suboptimum link after the optimum link, at this moment, when optimum link breaks down, need carry out definite process of optimum link and suboptimum link again.
Step 413:CNU1 determines self to register, and then the next-hop node on optimum link sends and transmits request message.
Step 414: after the next-hop node on this optimum link received this forwarding request message, the forwarding-table item of setting up the node identification comprise CNU1 was used for follow-uply carrying out data message forwarding at CNU1.
Subsequent process can go to step 405, according to the later flow performing of step 405, does not repeat them here.
In addition, need to prove that if the optimum link of determining is the link that CNU1 directly points to CLT, then CNU sends logon message or transmits request message to CLT; If CLT receives logon message, CNU is registered; If CLT receives the forwarding request message, then abandon this forwarding request message.And for not influence of CNU1, the next-hop node on the optimum link of CNU1 record is CLT, data message is directly sent to CLT get final product.
More than be the detailed description that method provided by the present invention is carried out, below CNU device provided by the present invention be described in detail.The structural representation of the CNU that Fig. 5 provides for the embodiment of the invention, as shown in Figure 5, this CNU can comprise: packet sending and receiving unit 501, link determining unit 502 and fault processing unit 503.
Packet sending and receiving unit 501 is used for broadcast transmission link state inquiry message; Receive the link-state information that CLT and each CNU reply; After link determining unit 502 was determined optimum link or switched optimum link, the next-hop node on optimum link sent logon message or transmits request message; Utilize optimum link to carry out the transmission of data message.
Because this CNU may be as the next-hop node in other CNU optimum link, therefore, this CNU can also comprise: list item is set up unit 504.
Packet sending and receiving unit 501 can also be used to receive logon message or the forwarding request message that other CNU sends, and logon message is transmitted to CLT; Utilize list item to set up the forwarding-table item of setting up unit 504 and carry out data message forwarding.
List item is set up unit 504, is used to set up the forwarding-table item of the source node sign that comprises logon message or transmit request message.
Particularly, link determining unit 503 utilizes link attenuation information that link-state information comprises and self place CNU to the link attenuation information between the node that sends this link-state information, determine self place CNU in the link of CLT the link attenuation minimum as optimum link, inferior little as the suboptimum link; Perhaps, the jumping figure information of utilizing link-state information to comprise determine self place CNU jumping figure in the link of CLT minimum as optimum link, inferior few as the suboptimum link; Perhaps, utilize link attenuation information and jumping figure information in the link-state information, and self place CNU is to the link attenuation information between the node that sends this link-state information, really self place CNU is to the weighted value of each link of CLT, determine the weighted value maximum as optimum link, inferior big as the suboptimum link.
Because determining of optimum link may be that CNU triggers when just having powered on, also may be that the suboptimum link that does not have to switch to optimum link triggers, therefore, this CNU can also comprise: registration judging unit 505, be used for after link determining unit 502 is determined optimum link or switched optimum link, judge whether self place CNU registers, if then trigger the next-hop node of packet sending and receiving unit 501 on optimum link and send and transmit request message; Otherwise trigger the next-hop node of packet sending and receiving unit 501 on optimum link and send logon message.
When CNU sent datagram to CLT as source node, packet sending and receiving unit 501 can be made as the source node that sends to the data message of CLT self place CNU, destination node is made as CLT; Perhaps, the source node that sends to the data message of CLT is made as the next-hop node on self place CNU, the destination node equipment optimum link and transmit in the identification field and carry the CLT node identification.
At different data message forwarding processing modes, the structure of CNU also can comprise following two kinds:
First kind, this CNU can also comprise: the first list item judging unit 506, when being used for receiving that in packet sending and receiving unit 501 destination node is the data message of CLT, judge that list item sets up unit 504 and whether set up the forwarding-table item that comprises this data message source node sign, if, then trigger packet sending and receiving unit 501 and give CLT, abandon this data message otherwise trigger packet sending and receiving unit 501 with this data message forwarding; When packet sending and receiving unit 501 receives that source node is the data message of CLT, if destination node is not self place CNU, judge that then list item sets up unit 504 and whether set up the forwarding-table item that comprises this data message destination node sign, if, then trigger the destination node that this data message is given with this data message forwarding in packet sending and receiving unit 501, abandon this data message otherwise trigger packet sending and receiving unit 501.
Second kind: this CNU can also comprise: the second list item judging unit 507 and forward processing unit 508.
The second list item judging unit 507, be used for receiving destination node for self and when transmitting identification field and carrying the data message of CLT node identification in packet sending and receiving unit 501, judge that list item sets up unit 504 and whether set up the forwarding-table item that comprises this data message source node sign, if, send first to forward processing unit 508 and handle notice, abandon this data message otherwise trigger packet sending and receiving unit 501; Receive destination node that CLT sends for self place CNU and transmit when carrying the data message of other CNU node identification in the identification field, judge that list item sets up unit 504 and whether set up and comprise the forwarding-table item of transmitting the node identification that carries in the identification field, if, send second to forward processing unit 508 and handle notice, abandon this data message otherwise trigger packet sending and receiving unit 501.
Forward processing unit 508, after being used to receive the first processing notice, the source node of the data message that packet sending and receiving unit 501 is received is revised as self place CNU, destination node is revised as CLT and transmits and is revised as the original source node sign of data message in the identification field, and triggers packet sending and receiving unit 501 amended data message is sent to CLT; After receiving the second processing notice, the source node of the data message that packet sending and receiving unit 501 is received is revised as self place CNU, destination node is revised as the node of transmitting the identification field indication, transmit in the identification field and do not carry any sign, and trigger packet sending and receiving unit 501 and amended data message forwarding is given the node of transmitting the identification field indication.
In addition, packet sending and receiving unit 501 receives destination node when not being the data message of self place CNU, abandons this data message; Receive destination node and be self place CNU and transmit identification field when not carrying the data message of any sign, do not transmit this data message.
Particularly, above-mentioned fault processing unit 503 can according to the fixed cycle to optimum link that link determining unit 502 is determined or the next-hop node on the optimum link after switching send the survival detection messages, if in setting-up time, do not receive the survival response message, then detect optimum link and break down.
By above description as can be seen, method and apparatus provided by the invention can possess following advantage:
1) CNU can be by the mode collection of link state information of broadcasting link status poll message among the present invention, thereby determine optimum link and the suboptimum link of this CNU to CLT, and on next-hop node, set up forwarding-table item to the mode that the next-hop node on the optimum link sends logon message or transmits request message, the message that makes CNU send to CLT can be transmitted by the next-hop node of optimum link; When optimum link breaks down, can be optimum link with the suboptimum link switchover, even if there is not the suboptimum link can carry out determining of optimum link and suboptimum link again yet, thereby guarantee when certain link breaks down, CNU also can carry out data communication by other link and CLT, thereby has improved the reliability of EOC system.
2) logon message also can be transmitted by the optimum link of determining among the present invention, breaks down even if CNU directly points to the link of CLT, also can carry out the forwarding of logon message by other CNU, thereby realizes the normal registration of CNU.
3) the present invention is when definite optimum link and suboptimum link, can be with CNU to the decay of each link between the CLT and jumping figure etc. as Consideration, the link of selecting current optimum carries out data communication, thereby improves the efficiency of transmission of data.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (17)
1, the data transmission method in a kind of coaxial Ethernet system is characterized in that this method comprises:
A, the first coaxial network unit CNU broadcast transmission link state inquiry message, the link-state information of utilizing coaxial line terminal CLT and each CNU to reply is determined optimum link and the suboptimum link of a described CNU to described CLT;
B, the described CNU next-hop node on optimum link sends logon message or transmits request message, if described next-hop node is CNU, then described next-hop node is set up the forwarding-table item that comprises a CNU node identification and is used to carry out data message forwarding at a CNU;
C, a described CNU utilize optimum link to carry out the transmission of data message;
If D the one CNU detects optimum link and breaks down, judge the current suboptimum link that whether exists, if, be optimum link then with the suboptimum link switchover, go to step B; Otherwise, go to steps A.
2, method according to claim 1, it is characterized in that link-state information comprises described in the steps A: at least one in to the optimum link dampening information of CLT and the node that sends this link-state information to the optimum link jumping figure information of CLT of the node that sends this link-state information;
Determine that a described CNU comprises to optimum link and the suboptimum link of described CLT: utilize a link attenuation information that described link-state information comprises and a CNU to the link attenuation information between the node that sends this link-state information, determine a CNU in the link of CLT the link attenuation minimum as optimum link, inferior little as the suboptimum link; Perhaps, the jumping figure information of utilizing described link-state information to comprise determine CNU jumping figure in the link of CLT minimum as optimum link, inferior few as the suboptimum link; Perhaps, utilize link attenuation information and jumping figure information in the described link-state information, and the one CNU to the link attenuation information between the node that sends this link-state information, determine the weighted value of a CNU to each link of CLT, determine the weighted value maximum as optimum link, inferior big as the suboptimum link.
3, method according to claim 1 is characterized in that, also comprises before described step B: a described CNU judges whether self registers, if then the next-hop node on optimum link sends and transmits request message in described step B; Otherwise the next-hop node in described step B on optimum link sends logon message;
If described next-hop node is CNU, then this method also comprises: after described next-hop node receives logon message, logon message is transmitted to described CLT.
4, method according to claim 1 is characterized in that, described step C specifically comprises:
If described next-hop node is CNU, it is a CNU that then described next-hop node receives the source node that a described CNU sends, when destination node is the data message of CLT, judge the local forwarding-table item that comprises a CNU node identification that whether exists, if, then give CLT, otherwise abandon this data message this data message forwarding;
It is that CLT, destination node are when being the data message of a described CNU that described next-hop node receives source node that CLT sends, judge the local forwarding-table item that comprises a CNU node identification that whether exists, if, then give a described CNU node, otherwise abandon this data message this data message forwarding.
5, method according to claim 1 is characterized in that, described step C specifically comprises:
If described next jumping is CNU, the source node that then described next-hop node receives described CNU transmission is that a CNU, destination node are this next-hop node and transmit when carrying the data message of CLT node identification in the identification field, judge the local forwarding-table item that comprises a CNU node identification that whether exists, if, the source node of this data message is revised as described next-hop node, after destination node is revised as and is revised as a CNU node identification in CLT and the forwarding identification field, give described CLT with this data message forwarding, otherwise abandon this data message;
The source node that described next-hop node receives described CLT transmission is that CLT, destination node are described next-hop node and transmit when carrying the data message of a CNU node identification in the identification field, judge the local forwarding-table item that comprises a CNU node identification that whether exists, if, the source node of this data message is revised as described next-hop node, after destination node is revised as a described CNU and transmits identification field and do not carry any sign, give a described CNU with this data message forwarding, otherwise abandon this data message.
6, method according to claim 5 is characterized in that, each CNU in the coaxial Ethernet system receives destination node when not being the data message of self, abandons this data message; Receive destination node and be self and transmit identification field when not carrying the data message of any sign, do not transmit this data message.
7, according to the described method of the arbitrary claim of claim 1 to 6, it is characterized in that, between described step C and step D, this method also comprises: a described CNU sends the survival detection messages according to the next-hop node of fixed cycle on described optimum link, if in setting-up time, do not receive the survival response message that described next-hop node is replied, then detect described optimum link and break down.
8, according to the described method of the arbitrary claim of claim 1 to 6, it is characterized in that, after described in the step D suboptimum link switchover being optimum link, and go to before the step B, also comprise: a described CNU sends the survival detection messages according to the next-hop node of fixed cycle on optimum link, if in setting-up time, do not receive the survival response message that next-hop node is replied, then go to steps A; If in setting-up time, receive the survival response message that next-hop node is replied, then go to step B.
9, a kind of coaxial network unit CNU is characterized in that, this CNU comprises: packet sending and receiving unit, link determining unit and fault processing unit;
Described packet sending and receiving unit is used for broadcast transmission link state inquiry message; Receive the link-state information that CLT and each CNU reply; After the link determining unit was determined optimum link or switched optimum link, the next-hop node on optimum link sent logon message or transmits request message; Utilize optimum link to carry out the transmission of data message;
Described link determining unit, the link-state information that is used to utilize described CLT and each CNU to reply is determined self place CNU optimum link and suboptimum link to described CKT; After receiving switching notice, be optimum link with the suboptimum link switchover;
Described fault processing unit, when being used to detect optimum link and breaking down, judge the current suboptimum link that whether exists, if, send switching notice to described link determining unit, and trigger next-hop node transmission logon message or the forwarding request message of described packet sending and receiving unit on optimum link; Otherwise, trigger described packet sending and receiving cell broadcast and send the link state inquiry message.
10, CNU according to claim 9 is characterized in that, this CNU also comprises: list item is set up the unit;
Described packet sending and receiving unit also is used to receive logon message or the forwarding request message that other CNU sends, and logon message is transmitted to CLT; Utilize described list item to set up the forwarding-table item of setting up the unit and carry out data message forwarding;
Described list item is set up the unit, is used to set up the forwarding-table item of the source node sign that comprises described logon message or transmit request message.
11, according to claim 9 or 10 described CNU, it is characterized in that, described link determining unit utilizes link attenuation information that described link-state information comprises and self place CNU to the link attenuation information between the node that sends this link-state information, determine self place CNU in the link of CLT the link attenuation minimum as optimum link, inferior little as the suboptimum link; Perhaps, the jumping figure information of utilizing described link-state information to comprise determine self place CNU jumping figure in the link of CLT minimum as optimum link, inferior few as the suboptimum link; Perhaps, utilize link attenuation information and jumping figure information in the described link-state information, and self place CNU is to the link attenuation information between the node that sends this link-state information, really self place CNU is to the weighted value of each link of CLT, determine the weighted value maximum as optimum link, inferior big as the suboptimum link.
12, according to claim 9 or 10 described CNU, it is characterized in that, this CNU also comprises: the registration judging unit, be used for after the link determining unit is determined optimum link or switched optimum link, judge whether self place CNU registers, if then trigger the next-hop node of described packet sending and receiving unit on optimum link and send the forwarding request message; Otherwise trigger the next-hop node of described packet sending and receiving unit on optimum link and send logon message.
According to claim 9 or 10 described CNU, it is characterized in that 13, described packet sending and receiving unit, the source node that also is used for sending to the data message of CLT are made as self place CNU, destination node is made as CLT; Perhaps, the source node that sends to the data message of CLT is made as the next-hop node on self place CNU, the destination node equipment optimum link and transmit in the identification field and carry the CLT node identification.
14, according to claim 9 or 10 described CNU, it is characterized in that, this CNU also comprises: the first list item judging unit, when being used for receiving that in described packet sending and receiving unit destination node is the data message of CLT, judge that list item sets up the unit and whether set up the forwarding-table item that comprises this data message source node sign, if, then trigger described packet sending and receiving unit and give CLT this data message forwarding, abandon this data message otherwise trigger described packet sending and receiving unit; When described packet sending and receiving unit receives that source node is the data message of CLT, if destination node is not self place CNU, judge that then list item sets up the unit and whether set up the forwarding-table item that comprises this data message destination node sign, if, then trigger the destination node that this data message is given with this data message forwarding in described packet sending and receiving unit, abandon this data message otherwise trigger described packet sending and receiving unit.
15, according to claim 9 or 10 described CNU, it is characterized in that this CNU also comprises: second list item judging unit and the forward processing unit;
The described second list item judging unit, be used for receiving destination node for self and when transmitting identification field and carrying the data message of CLT node identification in described packet sending and receiving unit, judge that described list item sets up the unit and whether set up the forwarding-table item that comprises this data message source node sign, if, send first to described forward processing unit and handle notice, abandon this data message otherwise trigger described packet sending and receiving unit; Receive destination node that CLT sends for self place CNU and transmit when carrying the data message of other CNU node identification in the identification field, judge that described list item sets up the unit and whether set up and comprise the forwarding-table item of transmitting the node identification that carries in the identification field, if, send second to described forward processing unit and handle notice, abandon this data message otherwise trigger described packet sending and receiving unit;
Described forward processing unit, after being used to receive the described first processing notice, the source node of the data message that the packet sending and receiving unit is received is revised as self place CNU, destination node is revised as CLT and transmits and is revised as the original source node sign of data message in the identification field, and triggering packet sending and receiving unit sends to CLT with amended data message; After receiving the described second processing notice, the source node of the data message that the packet sending and receiving unit is received is revised as self place CNU, destination node is revised as the node of transmitting the identification field indication, transmit in the identification field and do not carry any sign, and trigger the node that amended data message forwarding is given described forwarding identification field indication in the packet sending and receiving unit.
16, CNU according to claim 15 is characterized in that, described packet sending and receiving unit when also being used to receive destination node and not being the data message of self place CNU, abandons this data message; Receive destination node and be self place CNU and transmit identification field when not carrying the data message of any sign, do not transmit this data message.
17, according to claim 9 or 10 described CNU, it is characterized in that, described fault processing unit according to the fixed cycle to optimum link that described link determining unit is determined or the next-hop node on the optimum link after switching send the survival detection messages, if in setting-up time, do not receive the survival response message, then detect described optimum link and break down.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100932170A CN101656665B (en) | 2009-09-15 | 2009-09-15 | Data transmission method and device of coaxial Ethernet system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100932170A CN101656665B (en) | 2009-09-15 | 2009-09-15 | Data transmission method and device of coaxial Ethernet system |
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| Publication Number | Publication Date |
|---|---|
| CN101656665A true CN101656665A (en) | 2010-02-24 |
| CN101656665B CN101656665B (en) | 2011-09-07 |
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| CN2009100932170A Expired - Fee Related CN101656665B (en) | 2009-09-15 | 2009-09-15 | Data transmission method and device of coaxial Ethernet system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107018070A (en) * | 2016-01-28 | 2017-08-04 | 南水北调中线干线工程建设管理局 | A kind of isomery multimode gateway equipment and its transmission method and application |
| CN109802873A (en) * | 2017-11-17 | 2019-05-24 | 上海金阵半导体科技有限公司 | EoC load-balancing method and system and EoC local side apparatus |
-
2009
- 2009-09-15 CN CN2009100932170A patent/CN101656665B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107018070A (en) * | 2016-01-28 | 2017-08-04 | 南水北调中线干线工程建设管理局 | A kind of isomery multimode gateway equipment and its transmission method and application |
| CN109802873A (en) * | 2017-11-17 | 2019-05-24 | 上海金阵半导体科技有限公司 | EoC load-balancing method and system and EoC local side apparatus |
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| Publication number | Publication date |
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| CN101656665B (en) | 2011-09-07 |
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