CN1905492A - Method for monitoring and maintaining multi-data link - Google Patents
Method for monitoring and maintaining multi-data link Download PDFInfo
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- CN1905492A CN1905492A CNA2005100855496A CN200510085549A CN1905492A CN 1905492 A CN1905492 A CN 1905492A CN A2005100855496 A CNA2005100855496 A CN A2005100855496A CN 200510085549 A CN200510085549 A CN 200510085549A CN 1905492 A CN1905492 A CN 1905492A
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Abstract
The invention discloses a multiple-data link monitoring and maintaining method, comprising: setting basic timers and establishing at least a timer queue. When the basic timers reach the timing every time, it separately detects each to-be-monitored link in all current timer queues to be processed and determines whether the link normally transmits and receives data: if the link is transmitting data, it will not detect until the timer of the link reaches the timing again; if the link does not transmit data, sending handshake data packet; if the data is normally received by the link, not detecting until the timer reaches the timing again; if no data is received by the link, recording corresponding information and reporting alarm information if need be. And it can largely reduce link transmission and increase equipment capacity.
Description
Technical field
The present invention relates to the link maintenance technology, referring to especially a kind ofly has the data link of multilink to carry out the method for monitoring and maintenance to polytype and every type.
Background technology
In communication network, all to connect between each network equipment by link, finish the communication and the information interaction of LA Management Room.Usually,,, all need the state of each link of real-time confirmation whether normal, to guarantee the operate as normal of the network equipment and whole communication system as the RNC interoffice signaling link among the 3G for the especially important data link of each bar link.Here, described link is meant a point-to-point data path, can be the link that is directly connected in two LA Management Rooms, also can be middle link through a plurality of network equipment nodes; Described link can be a physical link of supporting variety of protocol, such as: the AAL5 of ATM(Asynchronous Transfer Mode), AAL2 etc.; IP or ether data link or the like.
In the prior art, generally adopt handshake mechanism to confirm whether every link is normal.Be exactly specifically: adopt independently application program or agreement respectively at every link, detect and judge whether employed link is normal by the timed sending handshake.Generally, it is long very short that being used to of being sent transmitted the packet bag of handshake, but for the real-time that guarantees to detect, transmission time interval is also very short, that is to say, need on the data link that is detected, send handshake comparatively continually, so, the working transmission of data link is increased, especially along with the fast development of communication network, the number of links of monitoring is more and more, cause the transmission quantity of handshake sharply to increase, in the whole traffic, occupy significant proportion, and, frequent transmitting-receiving to this short packages of handshake, detection can consume and take more CPU disposal ability, thereby makes the capacity of equipment be difficult to significantly improve.
In addition, the detection method of present this handshake mechanism is separate to the monitoring of every link, does not have unified management, therefore, can cause the wasting of resources.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of monitoring and maintaining multi-data link, can improve place capacity guaranteeing to reduce the link transmission amount greatly on the basis that link detects in real time.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of monitoring and maintaining multi-data link is provided with basic timer and sets up at least one timer queue, and to constantly, this method may further comprise the steps at each basic timer:
Determine the current timer queue that needs processing, need the monitoring link to detect successively to every in current all timer queues that need to handle, judge whether normally transceive data of link, if normally receiving data or data with existing sends, the timer of then waiting for this link next time then, if the data of not receiving, then the corresponding information of the record link of handling also reports when needed, if do not have data to send, then send the handshake data bag.
To constantly, this method specifically comprises at each basic timer:
A11. need the monitoring link as the current selected link with first in the current selected timer queue;
A12. receive and send sign according to link and judge the whether normally transmitting-receiving of current selected link, if normally receiving data or data with existing sends, execution in step a13 then, if the data of not receiving, then write down the data message of not receiving of current selected link, report when needed,, then send the handshake data bag if there are not data to send;
A13. judge whether to handle all links in the current selected timer queue, if, execution in step a14 then, otherwise order is got next bar link in the current selected timer queue as the current selected link, returns step a12;
A14. judge whether to also have timer queue then to handle, if do not have, then finish current handling process, otherwise, get next timer queue as the current selected timer queue, and get in the current selected timer queue first and need the monitoring link as the current selected link, return step a12.
Wherein, the current selected timer queue is described in the step a11: the timer queue of corresponding basic timer duration.
This method comprises that also need are monitored link is registered to the process of corresponding timer formation according to required monitoring periods, specifically comprises:
What a21. receive to need the monitoring link comprises chain line and the Control Parameter of Monitoring and Controlling time at least, and judges whether Control Parameter is legal, if, execution in step a22 then, otherwise, return error message, finish current link register flow path;
A22. judge whether the timer queue of the Monitoring and Controlling time correspondence received has been set up, if, execution in step a23 then, otherwise, set up with the received Monitoring and Controlling time be the timer queue of timing length;
A23. be the controll block of current link establishment correspondence, obtain this controll block resource requirement, and the controll block created of initialization;
A24. be in the timer queue of timing length with the insertion of the controll block after the initialization with the Monitoring and Controlling time.
This method also comprises monitors the process of link from corresponding timer formation deletion with need, specifically comprises:
What a31. receive to need the deletion link comprises chain line and the Control Parameter of Monitoring and Controlling time at least;
Whether the timer queue of a32. judging the Monitoring and Controlling time correspondence received exists, if exist, and execution in step a33 then, otherwise, return error message, finish current link circuit deleting flow process;
A33. from being all information that deletion needs the deletion link the timer queue of timing length with the Monitoring and Controlling time, obtaining and discharge the resource that needs the corresponding controll block of deletion link.
In the such scheme, described controll block comprises that chain line, link receiving flag, the accumulative frequency of not receiving data, receiving alarm sign, link send sign.When then the described transmission that need monitor link being detected, step a12 specifically comprises:
A1211. read controlling links parameter relevant in the current selected controlling links piece, judge that link sends sign and whether is in reset mode with transmission, if, then on the current selected link, send a handshake data bag, finish this and send testing process; Otherwise, after link transmission sign is set to reset mode, finishes this and send testing process.
This method further comprises: when described need monitoring link normally sent packet, the link of self sent sign and is set to SM set mode.
Link described in the step a1211 send sign whether be in reset mode by and bottom layer driving module or data distribution module between the Link State interface obtain.
When the described reception that need monitor link was detected, step a12 specifically comprised:
A1221. read in the current selected controlling links piece and receive relevant Control Parameter, judge whether the link receiving flag is in reset mode, if, execution in step a1223 then, otherwise, execution in step a1222;
A1222. will not receive the accumulative frequency zero clearing of data, and judge whether the receiving alarm sign is in to reset, if, execution in step a1226 then, otherwise report and alarm is removed information and the receiving alarm sign is resetted execution in step a1226;
A1223. accumulative frequency that will not receive data adds 1, whether judges the accumulative frequency of not receiving data more than or equal to the not reception data frequency threshold value that allows, if then execution in step 1224, otherwise, execution in step 1226;
A1224. judging whether the receiving alarm sign is in resets, if then execution in step 1225, otherwise, execution in step 1226;
A1225. report and alarm information, and with the receiving alarm flag set;
A1226. the link receiving flag is set to reset mode.
This method further comprises: when described need monitoring link normally received packet, the link receiving flag of self was set to SM set mode.The receiving flag of link described in the step a1221 whether be in reset mode by and bottom layer driving module or data distribution module between the Link State interface obtain.
In the such scheme, described link is AAL5 link or the AAL2 link or the AAL1 link of asynchronous transfer mode; Or be IP/ ether data link; Or be the HDLC link.Described basic timer is the timer more than or equal to the timing length minimum of system's support; The timing length of described each timer queue is the integral multiple of basic timer.
The method of monitoring and maintaining multi-data link provided by the present invention has following advantage and characteristics:
1) the present invention monitors data link used handshake data bag or claims soft heart to jump signal, combine with the normal transmitting-receiving of other packet of link, be used to monitor the current state of link, can significantly reduce the handshake data bag that link monitoring is used, especially when busy, not send out the handshake data bag and can monitor Link State in real time too.
2) monitoring of each data link is undertaken handling by a software module centralized and unifiedly, only does corresponding simple cooperation and handle in each link transmit-receive that need monitor is handled.Specifically, to the link of need monitoring, the position that the sign that cooperates is handled is flexible, can focus in the total entrance of data, and concentrating can be the unified monitoring of all links on the integrated circuit board; Also can be on the inlet of a device node such as interface board, the external link of whole data to be concentrated on one or several integrated circuit board to monitor; Also can be in corresponding application dispersion treatment.Adopt to concentrate still and disperse, can determine according to concrete application is convenient.
3) link of being monitored can be one or a kind of link, also can be a plurality of or multiple link is concentrated in together control, can also use multiple different timing that link or link group that needs detect different real-times requirements are monitored.Wherein, of a sort multilink can be used as a link group.
4) simplicity of design of the present invention is effective, does not need to take too many CPU processing resource and just can reach bigger processing capacity.Design of the present invention is along with place capacity increases, increase along with link data transmitting-receiving amount, receive and dispatch processing shake hands or heartbeat data packets will be fewer and feweri, if certain monitoring time has business data packet to send at interval, just can not send again and shake hands or heartbeat data packets.
5) handle flexibly, extensibility is good.The present invention adopts the control of different duration timer queues, can be as required by registration and deletion mode convenient, flexible link is carried out different time control, newly-increased or link that deletion will be controlled.
6) portable, reusability is good.Want the different data link of transplantation support monitoring, only need be in the driving of respective link inner or on the local easily corresponding of application software change a little, need not make amendment to other module.
7) also be unified control and manage to timer among the present invention, save disposal ability.
In a word, the invention provides the data link monitoring method of a kind of low CPU usage, low link bandwidth occupancy, be applicable to that various needs carry out in the environment of link monitoring, only too much receive and dispatch the problem that the handshake data bag consumes excess CPU disposal ability and bandwidth, the corresponding equipment cost that also more reduced before having solved for link monitoring.And then, satisfied in the mobile communication system RNC equipment to raising the efficiency, enlarge the requirement of capacity.
Description of drawings
Fig. 1 forms the schematic diagram of structure and principle realization for link monitoring module of the present invention;
Fig. 2 is the initialized implementation procedure schematic diagram of link monitoring modular among the present invention;
Fig. 3 is the implementation procedure schematic diagram of link registration among the present invention;
Fig. 4 is the implementation procedure schematic diagram of link circuit deleting among the present invention;
Fig. 5 is the implementation procedure schematic diagram of link monitoring maintaining method of the present invention;
Fig. 6 is to sending the implementation procedure schematic diagram of link monitoring among the present invention;
Fig. 7 is to receiving the implementation procedure schematic diagram of link monitoring among the present invention.
Embodiment
According to application analysis, when any link is is normally received and dispatched in the protocols having data, the connection state of this link should be good, there is no need to send the handshake data bag again and confirm whether link is normal this moment, when only in a period of time, not having other data packet transceive, just be necessary by regularly receiving and dispatching the handshake data bag confirms whether this link exists fault.
Based on above-mentioned analysis, core concept of the present invention is: for every link that needs to monitor is provided with the corresponding data block that comprises a plurality of Control Parameter, basic timer is set, and requiring to create the timer queue of the different durations of one or more correspondences according to the real-time of different link detecting, the duration of each timer queue is the integral multiple of basic timer duration; The link that need monitor is registered in the corresponding timer queue according to required monitoring periods, arrive constantly at each basic timer, need to determine the timer queue of processing earlier, need the monitoring link to detect respectively to every in current all timer queues that need to handle, judge whether normally transceive data of link according to the corresponding sign of every link, send if normally receive data or data with existing, wait for that then this chain timer then detects next time again; If do not receive data, the then corresponding information of the record link of handling and report and alarm information when needed; If do not send protocol data bag or application data bag, then send the handshake data bag.Accordingly, need the monitoring link for every, carrying out data when normally receiving and dispatching, the transmitting-receiving sign in self corresponding data piece is set to SM set mode.
In practical operation, the present invention adopts a link monitoring module that is used for unified all data link of monitoring, this link monitoring module is arranged at the bottom most software of each device node, can provide the driver module of Link State or data distribution module to carry out alternately with bottom, detect the current state that interface is known the link of monitoring by the Status Flag that is provided with, this link monitoring module is carried out two parallel flow processs simultaneously to the link of need monitoring: a flow process is when link has data transmission and Data Receiving, and the transmission of the link in the data block of respective link correspondence sign and link receiving flag are set to SM set mode respectively; Another flow process is to arrive constantly at each set timing length, detects the reception of each bar link of registering in the corresponding timer queue and send sign whether be in SM set mode.Specific practice is: for every the link that is registered in the current timer queue then, judge that the link receiving flag of respective link and link send to indicate whether all be in SM set mode, if all be in SM set mode, then remove all signs of this link; If receiving flag is not in SM set mode, then add up the receiving alarm counting, report and alarm when receiving alarm counting accumulative total arrives threshold value; Be not in SM set mode if send sign, then send a particular data packet, such as the discernible handshake data bag in opposite end.Processing can not only be monitored Link State in real time and be notified the link that is in abnormality at once like this, and big, the professional transmission quantity of handshake data bag for a long time of the capacity that can be reduced in greatly, thereby improves place capacity, reduces equipment cost, saves device resource.
Wherein, how concrete link monitoring module links to each other with the driver module of bottom or data distribution module and carries out alternately, can be in different ways according to actual application environment, such as: if bottom software or driving are the programs of independent development, respective handling is finished in certain appropriate location that then the link monitoring module directly can be embedded bottom software or driving; If bottom is bottom standard or operating system, then can described link monitoring module be articulated up by the hook interface, belong to prior art as for how to articulate, do not repeat them here.
As shown in Figure 1, link monitoring module among the present invention mainly comprises two parts: link monitoring task processing module and link monitoring and maintenance module, wherein, link monitoring and maintenance module be used to finish the transmission of control link handshake data bag and reception, link failure/recoverys report, carry out link that interface configuration, increase/deletion will monitor or the like function, the reception of link or transmission are broken down and are afterwards passed through interrupt mode report and alarm information; Link monitoring task processing module is to be detected by the periodicity that special task or thread process are finished need monitoring link.Have interface to carry out the transmission of handshake data bag between the driver module of link monitoring module and bottom, such as: the interface of link monitoring module and AAL5 drive part, with interface of ether drive part or the like.Accordingly, the link monitoring module externally has two kinds of interfaces:
A kind of is to control and report interface, be used to receive external command and external control interface, mainly be receive core processing unit is sent in the network equipment node this link monitoring module initialization of control, start, stop, orders such as link registration and link circuit deleting, and carry out accordingly and operate, return corresponding response, also be used to simultaneously to report at information such as the alarm of link or alarm releasings; Another kind is the Link State interface, because data transmit-receive is two separate processes, link receives and send sign itself does not have inherent contact, therefore every the link that will monitor is all had two cover state signs: link receiving flag and link send sign, the link monitoring module is when self is in starting state, can obtain the value of these two signs by the Link State interface, thereby the transmitting-receiving of link is monitored.Such as: among Fig. 1, the LinkID11 link, LinkID1x link and LinkID1n link all with shown in the queue heads of tms timer queue link to each other, here, tms is basic timer duration, it is the minimum timing duration that system supports, such as being 100ms, illustrate whether these three links need every 100ms to detect a Data Receiving normal, whether need to send the handshake data bag, therefore, these three links all are registered in the timer queue of 100ms correspondence, the link monitoring module sends sign by link receiving flag and the link that the every 100ms of Link State interface detects once every link, and according to indicating that whether being in SM set mode finishes corresponding operation, the timing length of other timer queue is the integral multiple of tms timer queue timing length, promptly equals N*tms.Here, the queue heads of all timer queues also can be placed in a formation or the array, or the queue heads of all timer queues is concatenated into a chained list, so that search.
Generally, for the link that each node connected, Link State determine to depend primarily on the Data Receiving direction, determine according to whether receiving agreement or application data bag or handshake data bag in the timing interval whether respective link breaks down, because for the data receiver of certain node to, though also whether periodic monitor has sent packet, but, whether there are not situations such as obstruction even send the FPDP that packet also only can illustrate present node on time, and can not prove that the link that present node connects has fault.
Because whether certain link monitoring module is worked and is in which kind of operating state, be to control, so the operating state of link monitoring module is divided into following several: a. no initializtion state by the core processing unit in the current apparatus for network node of living in of this link monitoring module; B. init state is meant that this link monitoring module finished initialization or reinitialize, and can carry out monitoring the registration/operations such as deletion of link at any time; C. starting state is meant that existing link is registered in certain or some timer queue that is provided with in the link monitoring module, and has started the real-time monitoring to the registration link, begins to report the state of link; D. halted state is meant and receives and stop the link monitoring order that the link monitoring module stops work at present under starting state, each Link State of registered link is set to reset mode.In fact, progressively go forward one by one between these four kinds of states, that is to say, on the basis of previous state, just can enter back one state, such as: only just can carry out the registration of link in the init state, having only has the link registration in the timer queue, just may start link monitoring, enters starting state.Simultaneously, b, c, three kinds of states of d also can constitute a circulation, after halted state, can be again from init state.
Link described in the present invention can be various physical links, such as: the AAL5 link of ATM, AAL2 link, AAL1 link; IP/ ether data link, HDLC link or the like is applied to rapid link usually.
Among the present invention, the data structure for the data block of every monitoring link setting is made up of several Control Parameter mainly comprises:
1. chain line LinkID is used for identifying a data link, to guarantee the uniqueness of link in all links of link monitoring module controls.
2. link receiving flag LinkRxFlag is used to identify whether received Frame in the current time interval.Generally, when each time period begins, judge this value of statistical indicant in the last time period,, illustrate that the last period do not receive data, will not receive that then the accumulative frequency value of data adds 1 if be reset mode still.This value of statistical indicant is set to SM set mode when every link normally receives data.
3. do not receive the accumulative frequency noRxPktCount of data, be used to write down the number of times of the continuous time interval that does not receive packet, as the foundation of alarm judgement.
4. receiving alarm sign RxAlarmFlag, link receives the alarm sign of bag, if had continuous n time as 3 times not to receive general data bag or handshake data bag, and this accumulated counts value is more than or equal to the threshold value that sets in advance, and then the receiving alarm sign is set.And, can determine when to the upper strata from zero variation according to this sign to send a warning message to 1 or from 1 to zero.
Every link for need monitorings all has fault and normal two states, and in the Data Receiving direction of link that certain node connects, whether link breaks down can whether set be judged according to receiving alarm sign RxAlarmFlag; Whether set then is whether to arrive the threshold value N that sets in advance according to the count value of not receiving the accumulative frequency noRxPktCount of data to determine to RxAlarmFlag.The value of threshold value N can determine according to concrete needs, and the RxAlarmFlag value judges that then this link has returned to normal condition when set becomes zero clearing.
5. link sends sign LinkTxFlag, is used to identify whether sent Frame in the current time interval.Generally, judge this value of statistical indicant in the last time period when each time period begins, if be reset mode still, illustrate that the last period do not send protocol data bag or application data bag, this value of statistical indicant is set to SM set mode when every link data with existing sends.
The present invention can provide multiple may use, timer queues with different control transmission time intervals as required, as 50ms, 100ms, 300ms, 700ms timer queue or the like, be used for the monitoring and the maintenance of link, support the difference of different links to safeguard time requirement, corresponding different timer queues.The control of timer can be adopted a reference source of a hardware timer, such as: it is reference clock that 100ms is set, the timing length of other different time that needs is adopted separately variable respectively, mode by counting is controlled getable various timing, and these times need be the integral multiples of benchmark hardware timer.Specifically the timing that needs can be determined according to concrete application at interval, and certainly, timing is short more, and is good more to the live effect of link failure monitoring.
For the handshake data bag that is used for link monitoring, the present invention does not carry out specifically defined to its form, as long as described handshake data bag meets the following conditions: the form of handshake data bag should meet the characteristic of the data link of using itself; And there is obvious characteristics to be easy to distinguish fully with other application data bag.
Further specify the implementation procedure of the inventive method below in conjunction with the drawings and specific embodiments.
Preamble is mentioned, the link monitoring modular can be carried out two parallel flow processs to need monitoring link among the present invention: first is that the corresponding SM set mode that is masked as is set when data transmit-receive is arranged, second is regularly to detect the reception that needs the monitoring link and send sign, to determine whether whether link normally receives, need to send the handshake data bag.Except that these two parallel flow processs, in actual applications, the link monitoring module also will be controlled and carry out the 3rd parallel flow process: the registration of link and deletion flow process, for any link that needs monitoring, can be registered in the corresponding timer queue according to the monitoring periods of self needs, and when need not to monitor, from the corresponding timer formation, delete, and can register at any time or delete, as for when registering or delete generally and can send instructions to the link monitoring module, finish by the link monitoring module controls by the core processing unit of link monitoring module node of living in.In these three parallel flow processs, first flow process is cooperatively interacted by link monitoring and maintenance module and bottom layer driving module or data distribution module and finishes, second flow process finished by the link monitoring task processing module in the link monitoring module, and the 3rd flow process is finished by link monitoring in the link monitoring module and maintenance module by external module control.
In addition, before the link monitoring module is carried out above-mentioned three parallel flow processs, the link monitoring module at first will be finished the initialization of self, mainly is the initialization relevant parameter and basic timer is set, and initialization procedure also is to be finished by link monitoring in the link monitoring module and maintenance module.Concrete processing procedure may further comprise the steps as shown in Figure 2:
Step 201～202: receive initial Control Parameter, all Control Parameter of initialization, and be that the current determined controll block of monitoring link correspondence that needs is distributed corresponding data storage resource.
Here, the initial Control Parameter of described reception mainly is meant and receives the chain line LinkID that current definite need are monitored link, because every needs the corresponding controll block that comprises some Control Parameter of monitoring link, so, after receiving the chain line, the Control Parameter with regard in each controll block of initialization is exactly specifically: with all signs in each controll block reset, all accumulative frequency zero clearings, distribute corresponding memory space for simultaneously each controll block, store all control parameter value.
Step 203: basic timer is set, and creates the timer queue of different duration correspondences as required, start basic timer afterwards.
Among the present invention, the basic timer of timer conduct of the minimum duration that can support more than or equal to system can be set, such as: 50ms or 100ms timer being set as basic timer, is that example describes with the 100ms timer as basic timer all below.
In this step, can create the timer queue of different duration correspondences as required, after the timer queue establishment is finished, just can need the monitoring link be registered in the corresponding timer queue with every according to the required monitoring periods of different links.Here, described actual as required be exactly that the link monitoring module is carried out corresponding operating according to the instruction of joint core processing unit of living in, such as: core processing unit detects once link A 100ms according to practical application needs command link monitoring modular, link B 200ms is detected once, link C 500ms is detected once, so, the link monitoring module is provided with the basic timer of 100ms, and establishment 100ms, the timer queue of 200ms and three timing length correspondences of 500ms, afterwards, with link A, link B and link C are registered to respectively in the formation of different timing device.
Among the present invention, the registration process of every link specifically may further comprise the steps as shown in Figure 3:
Step 301: the link monitoring module receives the Control Parameter such as chain line LinkID, Monitoring and Controlling time CntlTime that the outside need of sending as the core processing unit of node of living in are monitored link.
Step 302: whether the Control Parameter of judging current reception is legal, if illegal, then returns error message to unit that sends instruction such as core processing unit; Otherwise, execution in step 303.
Whether detect Control Parameter legal here, mainly is to check whether the chain line is effective sign, and such as whether belonging to the link that this node connects, whether the Monitoring and Controlling time is effective time or the like.
Step 303～304: judge whether the pairing timer queue of this CntlTime is created,, then set up with CntlTime that execution in step 305 then as the pairing timer queue of timing length if create, otherwise, direct execution in step 305.
Step 305: be the controll block of current link establishment correspondence, obtain the required resource of the controll block of creating, and initialization controll block.
Here, described establishment controll block is meant and is data structure of current link establishment, comprises that chain line, link receiving flag, the accumulative frequency of not receiving data, receiving alarm sign, link send parameters such as sign; The described resource of obtaining generally is meant the memory space that obtains the preservation data structure of creating from the buffering memory block; Described initialization is meant each sign is resetted, with each accumulated counts value zero clearing.
Step 306: the controll block after the initialization is inserted the corresponding timer rear of queue in proper order, perhaps require to be inserted into head according to priority.Like this, just be equivalent to link is registered in the corresponding timer queue.
Accordingly, the delete procedure of every link specifically may further comprise the steps as shown in Figure 4:
Step 401: the link monitoring module receives the Control Parameter such as chain line LinkID, Monitoring and Controlling time CntlTime that the outside need of sending as the core processing unit of node of living in are deleted link.
Step 402: judge whether to exist the pairing timer queue of CntlTime, if there is no, then return error message to unit that sends instruction such as core processing unit; Otherwise, execution in step 403.
Step 403: whether have link be designated the data of chain line that step 401 send, if do not have, then return error message to the instruction issue unit if searching in the timer queue of CntlTime correspondence; Otherwise, execution in step 404.
Here, the data of specifically how to search required chain line can adopt the whole bag of tricks, such as: directly locate by array index, perhaps use some existing methods of searching fast of unidirectional or doubly linked list, or by data content coupling or the like.
Step 404: all information of this link of deletion from the timer queue of CntlTime correspondence, obtain and discharge the resource that this need delete the corresponding controll block of link, wherein, described release resource is given back buffer storage with respective resources exactly.
So, just finished the deletion of respective link from timer queue.
Link monitoring maintaining method of the present invention specifically may further comprise the steps as shown in Figure 5:
Step 501～502: when the timing of basic timer arrives constantly, enter the current selected timer queue and begin to handle first and need the monitoring link, that is: need the monitoring link as the current selected link with described first.
Among the present invention, the link monitoring module is provided with basic timer, the timing length of all timer queue correspondences is the integral multiple of basic timer duration, such as: it is basic timer duration that 100ms is set, and 100ms timer queue, 200ms timer queue, 500ms timer queue or the like then can be set.The timing length of each timer queue is controlled by a counting variable, such as: counting variable T is initialized as 0, start basic timer after, a counting variable T added 1 when basic timer was every, so, during T=1, the 100ms timer queue need be handled; During T=2,100ms timer queue and 200ms timer queue need be handled; During T=5,100ms timer queue and 500ms timer queue need be handled, by that analogy.Generally, from timing to all timer queues the timer queue of timing length minimum begin to handle successively from small to large, can certainly handle successively by putting in order of timer queue itself, therefore, current selected timer queue described here refers to the timer queue that processed in sequence arrives.And link monitoring begins to handle successively by registration order from first link of each timer queue.
Step 503: the transmission to the current selected link detects, and the reception of current selected link is detected.Wherein, described selected link is meant the link that processed in sequence arrives; Do not have a sequencing to the processing that receives and send is actual, carry out earlier which operation can, can determine according to actual needs.Specifically how to handle hereinafter and can describe in detail in conjunction with the accompanying drawings receiving and sending.
Step 504～505: judge whether all links in the current selected timer queue are all handled, if then execution in step 506; Otherwise order is got next bar link in the current selected timer queue as the current selected link, returns step 503.
Step 506～508: judge whether that other timer queue then needs to handle,, then finish basic timer time handling process at interval if do not have; Otherwise, get next timer queue as the current selected timer queue, return step 502.
Wherein, the transmission to the current selected link described in the step 503 detects, and as shown in Figure 6, specifically may further comprise the steps:
Step 601: read Control Parameter relevant in the current selected controlling links piece, comprise that mainly link sends sign LinkTxFlag with transmission.
Step 602～604: judge that link sends whether sign LinkTxFlag is reset mode, if illustrate not send data that then send a handshake data bag on the current selected link, this transmission that finishes the current selected link detects; Otherwise, illustrating that data with existing sent, link sends sign LinkTxFlag and is set to reset mode, and this transmission that finishes the current selected link detects.
Need the monitoring link for any one, the node that connects link is behind each normal transmission protocol data bag of data transmission blocks or application data bag, can be set to SM set mode by this link link corresponding transmission sign LinkTxFlag, after the next time interval begins, link monitoring task processing module can obtain and judge that this link sends sign, the processing procedure of execution in step 601～604 afterwards in the link monitoring module.
Equally, the transmission to the current selected link described in the step 503 detects, and as shown in Figure 7, specifically may further comprise the steps:
Step 701: read in the current selected controlling links piece and receive relevant Control Parameter, comprise link receiving flag LinkRxFlag, do not receive accumulative frequency noRxPktCount, the receiving alarm sign RxAlarmFlag of data.
Step 702: judge whether link receiving flag LinkRxFlag is reset mode, if then execution in step 707, otherwise, execution in step 703.
Step 703: the accumulative frequency noRxPktCount zero clearing of will not receive data.
Step 704～706: judge whether receiving alarm sign RxAlarmFlag is reset mode, if then execution in step 711, otherwise report and alarm is removed information, and receiving alarm sign RxAlarmFlag is resetted execution in step 711.
Step 707: the accumulative frequency noRxPktCount that will not receive data adds 1.
Step 708: whether judge the accumulative frequency noTxPktCount that does not receive data more than or equal to the not reception data frequency threshold value that allows, if then execution in step 709, otherwise, execution in step 711.
Here, the not reception data of permission frequency threshold value is to preestablish, and this threshold value is the positive integer greater than 0.
Step 709: judge whether receiving alarm sign RxAlarmFlag is reset mode, if then execution in step 710; Otherwise, execution in step 711.
Step 710: report and alarm information, and with receiving alarm sign RxAlarmFlag set.
Step 711: link receiving flag LinkRxFlag is set to reset mode.
Need the monitoring link for any one, after the data reception module of the node that link is connected to receives packet at every turn, can be set to SM set mode by this link link corresponding receiving flag LinkRxFlag, after the next time interval begins, this link receiving flag, the processing procedure of execution in step 702～711 afterwards can be obtained and judge to link monitoring task processing module in the link monitoring module.
Method of the present invention can be to the basic timer of the different link utilization unification of all kinds, and different timing lengths carries out centralized and unified processing, and not only realize simply, handle flexibly and unify, and saving resource and cost.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (14)
1, a kind of method of monitoring and maintaining multi-data link is characterized in that, basic timer is set and sets up at least one timer queue, and to constantly, this method may further comprise the steps at each basic timer:
Determine the current timer queue that needs processing, need the monitoring link to detect successively to every in current all timer queues that need to handle, judge the whether normal transceive data of link, send that the timer of then waiting for this link next time then if normally receive data or data with existing; If the data of not receiving, then the corresponding information of the record link of handling also reports when needed; If do not have data to send, then send the handshake data bag.
2, method according to claim 1 is characterized in that, to constantly, this method specifically comprises at each basic timer:
A11. need the monitoring link as the current selected link with first in the current selected timer queue;
A12. receive and send sign according to link and judge the whether normally transmitting-receiving of current selected link, if normally receiving data or data with existing sends, execution in step a13 then, if the data of not receiving, then write down the data message of not receiving of current selected link, report when needed,, then send the handshake data bag if there are not data to send;
A13. judge whether to handle all links in the current selected timer queue, if, execution in step a14 then, otherwise order is got next bar link in the current selected timer queue as the current selected link, returns step a12;
A14. judge whether to also have timer queue then to handle, if do not have, then finish current handling process, otherwise, get next timer queue as the current selected timer queue, and get in the current selected timer queue first and need the monitoring link as the current selected link, return step a12.
3, method according to claim 2 is characterized in that, the timer queue of current selected described in the step a11 is: the timer queue of corresponding basic timer duration.
4, method according to claim 2 is characterized in that, this method comprises that also need are monitored link is registered to the process of corresponding timer formation according to required monitoring periods, specifically comprises:
What a21. receive to need the monitoring link comprises chain line and the Control Parameter of Monitoring and Controlling time at least, and judges whether Control Parameter is legal, if, execution in step a22 then, otherwise, return error message, finish current link register flow path;
A22. judge whether the timer queue of the Monitoring and Controlling time correspondence received has been set up, if, execution in step a23 then, otherwise, set up with the received Monitoring and Controlling time be the timer queue of timing length;
A23. be the controll block of current link establishment correspondence, obtain this controll block resource requirement, and the controll block created of initialization;
A24. be in the timer queue of timing length with the insertion of the controll block after the initialization with the Monitoring and Controlling time.
5, method according to claim 4 is characterized in that, this method also comprises monitors the process of link from corresponding timer formation deletion with need, specifically comprises:
What a31. receive to need the deletion link comprises chain line and the Control Parameter of Monitoring and Controlling time at least;
Whether the timer queue of a32. judging the Monitoring and Controlling time correspondence received exists, if exist, and execution in step a33 then, otherwise, return error message, finish current link circuit deleting flow process;
A33. from being all information that deletion needs the deletion link the timer queue of timing length with the Monitoring and Controlling time, obtaining and discharge the resource that needs the corresponding controll block of deletion link.
According to claim 4 or 5 described methods, it is characterized in that 6, described controll block comprises that chain line, link receiving flag, the accumulative frequency of not receiving data, receiving alarm sign, link send sign.
7, method according to claim 6 is characterized in that, when the described transmission that need monitor link was detected, step a12 specifically comprised:
A1211. read controlling links parameter relevant in the current selected controlling links piece, judge that link sends sign and whether is in reset mode with transmission, if, then on the current selected link, send a handshake data bag, finish this and send testing process; Otherwise, after link transmission sign is set to reset mode, finishes this and send testing process.
8, method according to claim 7 is characterized in that, this method further comprises: when described need monitoring link normally sent packet, the link of self sent sign and is set to SM set mode.
9, method according to claim 7 is characterized in that, link described in the step a1211 send sign whether be in reset mode by and bottom layer driving module or data distribution module between the Link State interface obtain.
10, method according to claim 6 is characterized in that, when the described reception that need monitor link was detected, step a12 specifically comprised:
A1221. read in the current selected controlling links piece and receive relevant Control Parameter, judge whether the link receiving flag is in reset mode, if, execution in step a1223 then, otherwise, execution in step a1222;
A1222. will not receive the accumulative frequency zero clearing of data, and judge whether the receiving alarm sign is in to reset, if, execution in step a1226 then, otherwise report and alarm is removed information and the receiving alarm sign is resetted execution in step a1226;
A1223. accumulative frequency that will not receive data adds 1, whether judges the accumulative frequency of not receiving data more than or equal to the not reception data frequency threshold value that allows, if then execution in step 1224, otherwise, execution in step 1226;
A1224. judging whether the receiving alarm sign is in resets, if then execution in step 1225, otherwise, execution in step 1226;
A1225. report and alarm information, and with the receiving alarm flag set;
A1226. the link receiving flag is set to reset mode.
11, method according to claim 10 is characterized in that, this method further comprises: when described need monitoring link normally received packet, the link receiving flag of self was set to SM set mode.
12, method according to claim 10 is characterized in that, the receiving flag of link described in the step a1221 whether be in reset mode by and bottom layer driving module or data distribution module between the Link State interface obtain.
13, method according to claim 1 is characterized in that, described link is AAL5 link or the AAL2 link or the AAL1 link of asynchronous transfer mode; Or be IP/ ether data link; Or be the HDLC link.
14, method according to claim 1 is characterized in that, described basic timer is the timer more than or equal to the timing length minimum of system's support; The timing length of described each timer queue is the integral multiple of basic timer.
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| CNB2005100855496A CN100411365C (en) | 2005-07-25 | 2005-07-25 | Method for monitoring and maintaining multi-data link |
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