CN1859040A - Delay fixed cascade network and its node binding method - Google Patents
Delay fixed cascade network and its node binding method Download PDFInfo
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Abstract
This invention discloses a casdade network with fixed time delay and a binding method for its nodes, in which, if the frame synchronous signals from the node of the preceding level are normal in the up and down directions, then the frame synchronous signals of the slave node are binded with the preceding level, if the frame synchronous signals from the preceding level node are abnormal in the up direction, then the signals of the slave node are binded with the down synchronous signals of the local node, the up frame synchronous signals of the slave node of the last level of the down line are binded with the down frame signals of the local node directly, in which, slave nodes generate frame synchronous signals of the local level based on the binded signals in the up and down directions and frame sybchronous test is finished by FSM, in which, conditions of the link frame synchronous signals from abnormal to normal is far more strict than that from the normal to abnormal.
Description
Technical field
The present invention relates to the constructing communication network technology, particularly fixing cascade network and the node binding method thereof of time-delay.
Background technology
1996 FCC (FCC) announced " 911 " urgent call (Emergencycall " 911 ", be called for short " E-911 ") location requirement, wherein require before October 1 calendar year 2001, various wireless cellular networks must provide the positioning service of precision in 125m to the travelling carriage that sends the E-911 urgent call, and the probability that satisfies this positioning accuracy is not less than 67%; And after calendar year 2001, provide higher positioning accuracy and three dimensional local information.Europe and Japan have also done corresponding requirement, show that it will be the basic function of cellular network indispensability from now on that the E-911 positioning service is provided.
There are two class implementations in the system that the wireless location service is provided, a kind of targeting scheme that is based on travelling carriage usually according to positioning the position of estimation and the difference of locator data purposes; Another kind is based on the targeting scheme of network.
These wireless location systems all are the geometric positions of coming the estimating target travelling carriage by the characteristic parameter that detects transmitting signal between travelling carriage and a plurality of fixed positions transceiver to the targeting scheme of travelling carriage.
Therefore, in order to guarantee transmission channel and receive path accuracy regularly, it is fixing to require transmission channel and receive path to postpone, and not powered on, restart and reset etc. influences.In wireless system, the timing error of the positioning function of travelling carriage requirement transmission channel and receive path within limits.
Cascade network with delay function as shown in Figure 1.From host node (Master Node) to from node (Slave Node) direction, perhaps from one from host node near from node to from host node far away be called down direction from node; The opposite direction of down direction is called up direction.Wherein, nearest from node 1 from host node, from node n farthest from host node, from node i be from node 1 and from any one-level between node n from node.
Time-delay in the cascade network fixedly is, and link delay up, down going channel do not powered on, restarted and resetted etc. influences, and is maintained fixed within the specific limits.
Will realize that in the cascade network mode time-delay is fixing, need hardware that one reference signal additionally is provided, for example, increase reference signal generation module as shown in Figure 2, making the reference signal that host node sends according to this module provides reference signal at different levels from node.And all reference signal bindings herewith of synchronizing signal from node at different levels, also, up, downlink data and all reference signal bindings herewith of frame synchronizing signal from node at different levels, thus make the inputs from node at different levels, output signal time-delay relation fixing.
In actual applications, there is following problem in such scheme: needs increase extra hardware, and the system cost height is realized complicated.
Cause the main cause of this situation to be, because reference signal need additionally be provided, this reference signal need increase hardware support, so improved the cost of system, realizes complicated.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of fixing cascade network and node binding method thereof of delaying time, and makes not just can to realize that by extra reference signal the time-delay of uplink and downlink passage fixes.
For achieving the above object, the invention provides a kind of fixing cascade network of delaying time, comprise the host node that is cascaded by the uplink and downlink passage and at least one is from node, at down direction, each is bound with the downlink frame synchronizing signal from its prime node from the downlink frame synchronizing signal of node;
Descending final stage is from the uplink frame synchronizing signal and the downlink frame synchronizing signal binding of being somebody's turn to do from node of node;
At up direction, except that descending final stage each from the node from the uplink frame synchronizing signal of node with from of the uplink frame synchronizing signal binding of its prime from node.
Wherein,, also be used for from node except that descending final stage each from the node is described at up direction, from its prime when the uplink frame synchronizing signal of node is in abnormality, with uplink frame synchronizing signal and this downlink frame synchronizing signal binding from node.
In addition, each described frame head detection module that comprises from node is used to detect the frame synchronizing signal from the prime node.
In addition, be used for the state machine that frame synchronization detects described also comprising from node, and this state machine comprises following state:
Normal condition is used to indicate the frame synchronizing signal from the prime node to be in the genlocing state, and this state allows down this from the frame synchronizing signal of node and frame synchronizing signal locking from the prime node;
Abnormality is used to indicate the frame synchronizing signal from the prime node to be in synchronous out-of-lock condition, forbids under this state that this is from the frame synchronizing signal of node and frame synchronizing signal locking from the prime node;
Described state machine reaches first thresholding that presets if the detected frame synchronizing signal cycle of frame head detection module equals the continuous frame number of predetermined value under abnormality, then this state machine changes normal condition over to;
Described state machine reaches second thresholding that presets if the detected frame synchronizing signal cycle of frame head detection module is not equal to the continuous frame number of predetermined value under normal condition, then this state machine changes abnormality over to; Wherein,
Described second thresholding is less than described first thresholding.
In addition, behind node reset, the initial condition of described state machine is an abnormality described.
In addition, describedly also comprise the frame head regeneration module, be used for regenerating frame synchronizing signal at the corresponding levels according to the frame synchronizing signal of being bound respectively, so that pass to back level node in the uplink and downlink direction from node.
The present invention also provides a kind of cascade network node binding method of delaying time fixing, and described network comprises host node being cascaded by the uplink and downlink passage and at least one from node, and each carries out following steps from node at down direction:
Whether judgement is in normal condition from the downlink frame synchronizing signal of its prime node, if then the downlink frame synchronizing signal of this node is bound with the downlink frame synchronizing signal from its prime node;
Each carries out following steps from node at up direction:
If descending final stage is from node, then directly with its uplink frame synchronizing signal and the downlink frame synchronizing signal binding of being somebody's turn to do from node;
If descending final stage beyond the node from node, then judge from its prime whether be in normal condition, if then with uplink frame synchronizing signal of this node and uplink frame synchronizing signal binding from its prime node from the uplink frame synchronizing signal of node.
Wherein, also comprise following steps:
At up direction, for described from node, be in abnormality, then with uplink frame synchronizing signal and this downlink frame synchronizing signal binding from node if judge downlink frame synchronizing signal from its prime node except that descending final stage each from the node.
In this external described method, described normal condition and abnormality are changed mutually according to following steps:
Under abnormality, if equaling the continuous frame number of predetermined value, the detected frame synchronizing signal cycle reaches first thresholding that presets, then this changes normal condition over to;
Under normal condition, if being not equal to the continuous frame number of predetermined value, the detected frame synchronizing signal cycle reaches second thresholding that presets, then this changes abnormality over to.
In this external described method, in the uplink and downlink direction, finish after the described binding, each is described also carries out following steps from node:
Regenerate frame synchronizing signal at the corresponding levels according to the frame synchronizing signal of being bound respectively, again the frame synchronizing signal that regenerates is delivered to back level node.
By finding that relatively the main distinction of technical scheme of the present invention and prior art is, in the uplink and downlink direction, if normal from the frame synchronizing signal of prime node, then binds from the frame synchronizing signal and the prime of node.At up direction, if unusual from the frame synchronizing signal of prime node, then from the frame synchronizing signal of node and the downlink frame synchronizing signal binding of this node.From node, its uplink frame synchronizing signal downlink frame synchronizing signal direct and this node is bound for descending final stage.
After finishing binding,, regenerate frame synchronizing signal at the corresponding levels according to the frame synchronizing signal of being bound respectively from node in the uplink and downlink direction.
Adopt state machine to finish frame synchronization and detect, wherein the isl frame synchronizing signal by abnormality to the condition strictness far away of normal condition in frame synchronizing signal by the condition of normal condition to abnormality.
Difference on this technical scheme has brought comparatively significantly beneficial effect, promptly under the prerequisite by extra reference signal not, by original transmission signals, has realized that the time-delay in the cascade network mode is fixed.
Because the frame synchronizing signal of each grade respectively with prime binding, so frame synchronizing signal can be handed on effectively successively when whole network operate as normal, adjacent time-delay between node is fixed.
Because uplink frame synchronizing signal at the corresponding levels can change and downlink frame synchronizing signal binding at the corresponding levels when up prime is unusual, so whole network has stability preferably, can communication issue not occur and cause the time-delay of whole network fixedly to be destroyed because of link in the data feedback channel.
From the regeneration of node, avoided the shake of the frame synchronizing signal of prime input to hand on by each grade along cascade network one-level level to frame synchronizing signal.
Because the condition that forwards normal condition from abnormality to just recovered normal more than by the condition strictness of normal condition to abnormality so both fully guaranteed link frame synchronization detected state behind complete stability; When having guaranteed the shake in a single day of isl frame synchronizing signal again or adjustment taking place, the frame synchronization detection module just can detect unusually.
Description of drawings
Fig. 1 is a prior art cascade schematic network structure;
Fig. 2 is a kind of subtended network configuration schematic diagram of delaying time fixing in the prior art;
Fig. 3 is according to the fixing subtended network configuration schematic diagram of the time-delay of first embodiment of the invention;
Fig. 4 be according to the fixing cascade network of the time-delay of first embodiment of the invention from the node structure schematic diagram;
Fig. 5 is the state exchange schematic diagram of state machine from node according to the fixing cascade network of the time-delay of first embodiment of the invention;
Fig. 6 be according to the fixing cascade network of the time-delay of second embodiment of the invention from the node structure schematic diagram;
Fig. 7 is the internal structure schematic diagram of frame head regeneration module from node according to second embodiment of the invention;
Fig. 8 is the method for synchronous flow chart according to the uplink frame synchronizing signal of the fixing cascade network node binding of the time-delay of third embodiment of the invention;
Fig. 9 is the method for synchronous flow chart according to the downlink frame synchronizing signal of the fixing cascade network node binding of the time-delay of four embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention delays time fixing cascade network under the prerequisite by extra reference signal not, the state of the frame synchronizing signal of up-downgoing prime node is judged from node by at different levels, if normal, then this is bound with it from the corresponding frame synchronizing signal of node; If the uplink frame synchronizing signal of up prime node is unusual, then this uplink frame from node is bound with this downlink frame synchronizing signal from node synchronously; If the downlink frame synchronizing signal of descending prime node is unusual, then this downlink frame synchronizing signal from node keeps former regular operation, and the variation with unusual descending prime node downlink frame synchronizing signal does not change.By normal signal in original transmission signals in the network, keep the stable of network, realized that the time-delay in the cascade network mode is fixed.
The structure of the cascade network that the time-delay of first embodiment of the invention is fixing as shown in Figure 3.It is individual from node that this network comprises the host node and the n (n＞0) that are cascaded by the uplink and downlink passage.
Wherein, at down direction, each is bound with the downlink frame synchronizing signal from its prime node from the downlink frame synchronizing signal of node.
At up direction, descending final stage is from the uplink frame synchronizing signal and this downlink frame synchronizing signal binding from node of node; And except that descending final stage from node, each is from the uplink frame synchronizing signal of node and from the uplink frame synchronizing signal binding of its prime from node, if but be in abnormality from its prime from the uplink frame synchronizing signal of node, then will this from node uplink frame synchronizing signal and this downlink frame synchronizing signal binding from node.Therefore, when whole network operate as normal, the frame synchronizing signal of each grade respectively with the prime binding, frame synchronizing signal can be handed on effectively successively, and adjacent time-delay between node is fixed.
Specifically, this network includes the frame head detection module of uplink and downlink frame synchronizing signal and corresponding with it respectively state machine from the structure of node as shown in Figure 4.
Wherein, frame head detection module up, down direction detects the frame synchronizing signal from up, descending prime node respectively.
State machine then is used for frame synchronization and detects, the state exchange that the frame synchronization of utilizing this state machine to carry out detects as shown in Figure 5, the initial condition of state machine is an abnormality.
Abnormality is used to indicate the frame synchronizing signal from the prime node to be in synchronous out-of-lock condition, forbids under this state that this is from the frame synchronizing signal of node and frame synchronizing signal locking from the prime node.
And the normal condition of state machine then is used to indicate the frame synchronizing signal from the prime node to be in the genlocing state, and this state allows down this from the frame synchronizing signal of node and frame synchronizing signal locking from the prime node.
If state machine is under abnormality, if equaling the continuous frame number x of predetermined value T, t of detected frame synchronizing signal cycle of frame head detection module reaches the first thresholding A that presets, i.e. continuous frame number x 〉=A of t=T, then this state machine changes normal condition over to.
If state machine is under normal condition, if the continuous frame number x of the detected t ≠ T of frame head detection module reaches the second thresholding B that presets, i.e. x 〉=B, then this state machine changes abnormality over to, and wherein, A is far longer than B, and for example A gets 10 and B gets 1.Make like this and forward the condition of normal condition to more than the reverse conversion strictness from abnormality, just recovered normal so both fully guaranteed link frame synchronization detected state behind complete stability, when having guaranteed the shake in a single day of isl frame synchronizing signal again or adjustment taking place, the frame head detection module just can detect unusually.
The structure of the cascade network that the time-delay of second embodiment of the invention is fixing is with first execution mode, as shown in Figure 3.Difference is that each as shown in Figure 6, wherein not only comprises frame head detection module and state machine from the node structure difference, also comprises the frame head regeneration module of uplink and downlink frame synchronizing signal.
Specifically, the frame head regeneration module, internal structure shown in frame of broken lines among Fig. 7, comprise three with door, one or, d type flip flop, counter, comparator, frame synchronizing signal module of living again.
Wherein, with door be with input signal do with computing or the door be with input signal do exclusive disjunction, d type flip flop is used to latch effective input signal.
And counter is used for counting according to the clock frequency of circuit, in case be cleared, just begins counting.Preset count value Y in the comparator, the internal clocking frequency of Y=T/ Circuits System according to the clock frequency of frame synchronization periods T and circuit.Be used for the count value y and the Y of counter are compared, when y=Y, produce triggering signal output.
The frame synchronizing signal module of living again is used for regenerating frame synchronizing signal at the corresponding levels according to the frame synchronizing signal of being bound respectively in the uplink and downlink direction, so that pass to back level node.
The operation of frame head regeneration module is specific as follows:
Frame synchronizing signal by frame head detection module detection prime node is s1 earlier, and read its current state and NextState respectively from state machine, obtaining the current state value is that 0 o'clock respective signal is that s3 and NextState value are that 1 o'clock respective signal is that (state value is 1 to s2, then represents normal condition; Be 0, then represent abnormality), again these two signals are obtained signal s4 (be 1 when the value of signal s2, s3 is 1 duration only, otherwise value being 0) by logical AND gate 11.
Use signal s4 to control the synchronous set end S of d type flip flop, by the frame synchronizing signal s1 of the prime node synchronous reset signal as d type flip flop, and the priority of reset signal s1 is higher than synchronous asserts signal s4 synchronously.Detect the system clock rising edge when effective at d type flip flop, judge at first whether synchronous reset signal s1 is 1, if be 1, then the signal s5 of output Q is 0, otherwise judge synchronous asserts signal s4, if this signal is 1, then the signal s5 of output Q is 1, otherwise the signal s5 of output Q remains unchanged.Signal s5 represents that the frame synchronizing signal s1 from node detection to the prime node at the corresponding levels enters normal condition 1 by abnormality 0.
Respectively signal s5 is input to two with the door 12,13 in, with door 12 in be to do and computing with prime node frame synchronizing signal s1, obtain signal s6.
With door 13 in, another frame synchronizing signal s7 of signal s5 and signal s3 and this node does and computing, obtains signal s8.Wherein, for down link, then the value perseverance of another frame synchronizing signal s7 of this node is 0; For up link, another frame synchronizing signal s7 of this node is this downlink frame synchronizing signal from node.When signal s8 represented that prime node frame synchronizing signal s1 is detected as abnormality, this was from the corresponding frame synchronizing signal and the signal s7 binding of node.This design guarantee descending final stage from the uplink frame synchronizing signal of node with its downlink frame synchronizing signal binding, when unusual, its regeneration frame synchronizing signal is with its downlink frame synchronizing signal binding from the uplink frame synchronization signal detection of node.This mechanism guarantees up link under prime link abnormal conditions, back level link by and its down link binding, what is finished in the cascade network subsequently from the link time-delay fixed function of node.That is: make up link at the corresponding levels and thereafter the level link the time-delay fixed function unaffected.
Signal s6 and signal s8 are done exclusive disjunction, obtain signal s9, and the zero clearing of using signal s9 to come control counter.Signal s6 or signal s8 are if it is 1 that (or two a) value is arranged, then to counter O reset; Otherwise, rolling counters forward, the value of obtaining y.When signal s6 represents that the frame synchronizing signal s1 of prime node enters the frame synchronizing signal effective (s1=1) of normal condition 1 and prime node by abnormality 0, counter is cleared, thereby adjust the sequential of regeneration frame synchronizing signal at the corresponding levels, make the frame synchronizing signal binding of itself and prime node.This mechanism shows: has only when frame synchronization detected state machine enters normal condition 1, and the frame synchronizing signal binding of regeneration frame synchronizing signal ability at the corresponding levels and prime node, otherwise the sequential of regeneration frame synchronizing signal at the corresponding levels is controlled by signal s8.
By comparator y and threshold value Y are compared, if y equals Y, the trigger frame synchronizing signal module of living again then, and regenerate frame synchronizing signal and send into the back level from node according to this cycle.
Like this, the frame head regeneration module is set from node in each level, make each grade from node by to the regeneration of frame synchronizing signal, effectively avoided the shake of the frame synchronizing signal of prime input to hand on along cascade network one-level level.
The method for synchronous of the downlink frame synchronizing signal of the cascade network node binding that the time-delay of third embodiment of the invention is fixing as shown in Figure 8.This network comprises host node being cascaded by the uplink and downlink passage and n as shown in Figure 3 from node.
In step 801, judge whether the state of downlink frame synchronizing signal of descending prime node is normal, if then change step 802 over to; Otherwise change step 803 over to.
Wherein, normal condition and abnormality are changed mutually according to following steps, as shown in Figure 5:
Under abnormality, if equaling the continuous frame number of predetermined value T, the detected frame synchronizing signal cycle reaches the first thresholding A that presets, then this changes normal condition over to; Under normal condition, if being not equal to the continuous frame number of predetermined value T, the detected frame synchronizing signal cycle reaches the second thresholding B that presets, then this changes abnormality over to.
In step 802, with this downlink frame synchronizing signal binding from the downlink frame synchronizing signal prime node descending of node with it.
In step 803, keep this original downlink frame synchronizing signal, and change step 804 over to from node.
In step 804, according to the downlink frame synchronizing signal of binding or being kept, regenerate this downlink frame synchronizing signal from node by the frame head regeneration module.
In step 805, judge whether this is that descending final stage is from node, if then change step 806 over to from node; Otherwise change step 807 over to.
In step 806, with newly-generated downlink frame synchronizing signal as this from the reference of node uplink frame synchronizing signal.
In step 807, newly-generated downlink frame synchronizing signal is sent to descending back level from node.
The method for synchronous of the uplink frame synchronizing signal of the cascade network node binding that the time-delay of four embodiment of the invention is fixing as shown in Figure 9.This network comprises host node being cascaded by the uplink and downlink passage and n also as shown in Figure 3 from node.
In step 901, judge whether this is that descending final stage is from node, if then change step 903 over to from node; Otherwise change step 902 over to.
In step 902, judge whether up prime is in normal condition from the uplink frame synchronizing signal of node, if then change step 904 over to; Otherwise change step 903 over to.
In step 903, with its uplink frame synchronizing signal and the binding of its downlink frame synchronizing signal, wherein, the downlink frame synchronizing signal obtains by the method for synchronous of above-mentioned execution mode from node for this.
In step 904, this uplink frame synchronizing signal prime up with it from node is bound from the uplink frame synchronizing signal of node.
Because when up prime is unusual from node state, uplink frame synchronizing signal at the corresponding levels is not bound from the frame synchronizing signal of node with up prime, and change and downlink frame synchronizing signal binding at the corresponding levels, institute can communication issue not occur and cause the time-delay of whole network fixedly to be destroyed so that whole network has stability preferably because of link in the data feedback channel.
In step 905, according to the frame synchronizing signal of being bound, regenerate this uplink frame synchronizing signal from node by the frame head regeneration module.
In step 906, newly-generated uplink frame synchronizing signal is sent to up back level node.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (10)
1. cascade network that time-delay is fixing, comprise the host node that is cascaded by the uplink and downlink passage and at least one is from node, it is characterized in that at down direction, each is bound with the downlink frame synchronizing signal from its prime node from the downlink frame synchronizing signal of node;
Descending final stage is from the uplink frame synchronizing signal and the downlink frame synchronizing signal binding of being somebody's turn to do from node of node;
At up direction, except that descending final stage each from the node from the uplink frame synchronizing signal of node with from of the uplink frame synchronizing signal binding of its prime from node.
2. the cascade network that time-delay according to claim 1 is fixing, it is characterized in that, at up direction, also be used for from node except that descending final stage each from the node is described, from its prime when the uplink frame synchronizing signal of node is in abnormality, with uplink frame synchronizing signal and this downlink frame synchronizing signal binding from node.
3. the cascade network that time-delay according to claim 2 is fixing is characterized in that each described frame head detection module that comprises is used to detect the frame synchronizing signal from the prime node from node.
4. the cascade network that time-delay according to claim 3 is fixing is characterized in that, be used for the state machine that frame synchronization detects described also comprising from node, and this state machine comprises following state:
Normal condition is used to indicate the frame synchronizing signal from the prime node to be in the genlocing state, and this state allows down this from the frame synchronizing signal of node and frame synchronizing signal locking from the prime node;
Abnormality is used to indicate the frame synchronizing signal from the prime node to be in synchronous out-of-lock condition, forbids under this state that this is from the frame synchronizing signal of node and frame synchronizing signal locking from the prime node;
Described state machine reaches first thresholding that presets if the detected frame synchronizing signal cycle of frame head detection module equals the continuous frame number of predetermined value under abnormality, then this state machine changes normal condition over to;
Described state machine reaches second thresholding that presets if the detected frame synchronizing signal cycle of frame head detection module is not equal to the continuous frame number of predetermined value under normal condition, then this state machine changes abnormality over to; Wherein,
Described second thresholding is less than described first thresholding.
5. the cascade network that time-delay according to claim 4 is fixing is characterized in that behind node reset, the initial condition of described state machine is an abnormality described.
6. according to the fixing cascade network of each described time-delay in the claim 1 to 5, it is characterized in that, describedly also comprise the frame head regeneration module from node, be used for regenerating frame synchronizing signal at the corresponding levels according to the frame synchronizing signal of being bound respectively, so that pass to back level node in the uplink and downlink direction.
7. cascade network node binding method that time-delay is fixing, described network comprise host node being cascaded by the uplink and downlink passage and at least one from node, it is characterized in that each carries out following steps from node at down direction:
Whether judgement is in normal condition from the downlink frame synchronizing signal of its prime node, if then the downlink frame synchronizing signal of this node is bound with the downlink frame synchronizing signal from its prime node;
Each carries out following steps from node at up direction:
If descending final stage is from node, then directly with its uplink frame synchronizing signal and the downlink frame synchronizing signal binding of being somebody's turn to do from node;
If descending final stage beyond the node from node, then judge from its prime whether be in normal condition, if then with uplink frame synchronizing signal of this node and uplink frame synchronizing signal binding from its prime node from the uplink frame synchronizing signal of node.
8. the cascade network node binding method that time-delay according to claim 7 is fixing is characterized in that, also comprises following steps:
At up direction, for described from node, be in abnormality, then with uplink frame synchronizing signal and this downlink frame synchronizing signal binding from node if judge downlink frame synchronizing signal from its prime node except that descending final stage each from the node.
9. the cascade network node binding method that time-delay according to claim 8 is fixing is characterized in that described normal condition and abnormality are changed mutually according to following steps:
Under abnormality, if equaling the continuous frame number of predetermined value, the detected frame synchronizing signal cycle reaches first thresholding that presets, then this changes normal condition over to;
Under normal condition, if being not equal to the continuous frame number of predetermined value, the detected frame synchronizing signal cycle reaches second thresholding that presets, then this changes abnormality over to.
10. according to the fixing cascade network node binding method of each described time-delay in the claim 7 to 9, it is characterized in that,, finish after the described binding that each is described also carries out following steps from node in the uplink and downlink direction:
Regenerate frame synchronizing signal at the corresponding levels according to the frame synchronizing signal of being bound respectively, again the frame synchronizing signal that regenerates is delivered to back level node.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009129724A1 (en) * | 2008-04-23 | 2009-10-29 | 华为技术有限公司 | Uplink channel delay confirming method and device |
| CN106647443A (en) * | 2016-10-31 | 2017-05-10 | 杭州优稳自动化系统有限公司 | Intelligent controller cascade method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009129724A1 (en) * | 2008-04-23 | 2009-10-29 | 华为技术有限公司 | Uplink channel delay confirming method and device |
| CN101286758B (en) * | 2008-04-23 | 2011-09-14 | 华为技术有限公司 | Method and apparatus to determine delay of uplink channel |
| CN106647443A (en) * | 2016-10-31 | 2017-05-10 | 杭州优稳自动化系统有限公司 | Intelligent controller cascade method |
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