CN106888050B - MRR fault detection means and method in PNoC - Google Patents
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Abstract
The present invention discloses MRR fault detection means and method in a kind of PNoC, for as manufacturing defect and MRR it is sensitive to temperature height fluctuation and caused by failure, initially set up fault model, and design a kind of PNOC framework by being constituted including laser array, test vector generator, control vector generator, data coupler, MRR to be measured and rectangular box, test data is coupled in optical path by data coupler, by the open and closed for controlling MRR, to collected test response analysis, accident analysis and diagnosis are carried out.
Description
Technical field
The present invention relates to PNoC (PhotonicNetwork-on-Chip, network on mating plate) the field of test technology, specifically relate to
And MRR (MicroRingResonator, micro-ring resonator) fault detection means and method in a kind of PNoC.
Background technique
IP kernel with the development of modern semiconductors manufacturing process and the application of nanotechnology, on system level chip SoC
It increases sharply, the communication bandwidth between IP kernel and power consumption become new bottleneck.In order to increase bandwidth and reduce power consumption, PNOC is most
It is hopeful to substitute traditional electric NOC.It is interconnected by high-speed switch MRR and the optical waveguide of low-power consumption, realizes bigger bandwidth and more
Low power consumption, PNOC are trend and the model of next-generation network-on-chip interconnection.MRR is the Primary Component in PNOC, however due to
Manufacturing defect, and MRR is sensitive to temperature height fluctuation, MRR is easy to happen failure, therefore there is an urgent need to MRR events in a kind of PNOC
Hinder detection device.
Summary of the invention
The present invention is sensitive because of manufacturing defect and to temperature height fluctuation for MRR in PNOC, and MRR is easy to happen asking for failure
Topic provides MRR fault detection means and method in a kind of PNoC.
To solve the above problems, the present invention is achieved by the following technical solutions:
MRR fault detection means in PNoC, including laser array, test vector generator, control vector generator, number
According to coupler, MRR to be measured and rectangular box；The total phase of laser number included in laser array and MRR to be measured
Together；Each laser generates the laser light wave of 1 wavelength, and each not phase of the wavelength of laser light wave caused by all lasers
Together, entire laser array generates the laser light wave of wavelength-division multiplex；Test vector generator generates test vector, the test vector
Each component be used to control the opening and closing of corresponding laser；The input terminal of data coupler is separately connected laser array and test
Vector generator；Test vector caused by test vector generator is coupled to caused by laser array by data coupler
In the optical path of laser light wave；The number of rectangular box is 1/2 of the sum of MRR to be measured in PNoC；Each rectangular box is by 4 IP
Core, 1 electric router and 1 photoelectric conversion interface composition；4 IP kernels are connected with each other by 1 electric router, photoelectric conversion interface
Electric router is connected with the output end of data coupler；Each rectangular box passes through photoelectric conversion interface and 2 MRR phases to be measured
Even, one of them MRR to be measured is used as by IP kernel sends MRR, another MRR to be measured is used as transmission MRR as by IP kernel；
Control vector generator is connect with the control terminal of MRR to be measured all in PNoC；It controls vector generator and generates control vector, it should
Each component of control vector is used to control the opening and closing of corresponding MRR.
In above scheme, each resonance optical wavelength phase with 1 MRR of the wavelength of laser light wave caused by each laser
Together.
In above scheme, the wavelength of laser light wave is incremented by successively at equal intervals caused by each laser or successively decreases.
In above scheme, the opening and closing of control laser is gone by the test vector that test vector generator generates specifically:
When the component of test vector is 1, the light wave for generating respective wavelength is represented, that is, opens corresponding laser；When test vector
When component is 0, the light wave for not generating respective wavelength is represented, that is, closes corresponding laser.
In above scheme, the opening and closing of control MRR is gone by the test vector that control vector generator generates specifically: work as control
When the component of vector processed is 1, it is in the open state to represent MRR；When the component for controlling vector is 0, represents MRR and be in closing shape
State.
MRR fault detection method, includes the following steps: in the PNoC that above-mentioned apparatus is realized
The laser of laser array generates the laser light wave of different wave length, and laser light wave caused by each laser
The resonance optical wavelength of corresponding 1 MRR of wavelength；
Vector is controlled by test vector generator and control vector generator load test vector sum, and obtains test and rings
It answers, and judges whether the MRR in PNoC breaks down and fault type accordingly；
(I) if load is all 1 test vector and is all 0 control vector, test obtained, which responds, is all 0, and
Load is all 1 test vector and is all 1 control vector, when test response obtained is all 1, then it represents that all MRR are equal
Do not break down；
(II) if load is all 1 test vector and is all 0 control vector, when the i-th bit of test response obtained is 1,
Then indicate that stagnant 1 failure occurs in i-th of MRR；
(III) if load is all 1 test vector and is all 1 control vector, when the i-th bit of test response obtained is 0,
Then need further load be all 1 test vector and 1~i-1 be 0, i-th~n be 1 control vector；
If 1~i of test response obtained are 0, i+1~n is 1, then it represents that i-th of MRR occurs stagnant 0
Failure；
If having in 1~i-1 of test response obtained and only one being 1, i-th bit is 0 and i+1
~n is 1, then it represents that bridging fault occurs in i-th of MRR；
Above-mentioned i=1,2 ... ..., n；N is the sum of MRR in PNoC.
In above scheme, that in PNoC includes n MRR, this n MRR is respectively MRR1, MRR2 ... ..., MRRn, right
The resonance optical wavelength answered is respectively W1, W2 ... ..., Wn, and W1 < W2 < ... < Wn；N laser of laser array is produced
Raw optical maser wavelength is W1, W2 ... ..., Wn, and W1 < W2 < ... < Wn；Above-mentioned n is the sum of MRR in PNoC.
In above scheme, in the fault type for determining MRR, be based in PNoC when and only a MRR is faulty
Under the premise of carry out.
Compared with prior art, the present invention is directed to since manufacturing defect and MRR are sensitive to temperature height fluctuation and cause
Failure, initially set up fault model, and design the framework of PNOC a kind of, be coupled to test data by data coupler
In optical path, by controlling the ON and OFF state of MRR, to collected test response analysis, accident analysis and diagnosis are carried out.
Detailed description of the invention
Fig. 1 is MRR fault detection schematic diagram in PNOC；
Fig. 2 is stagnant 1 fault model；
Fig. 3 is stagnant 0 fault model；
Fig. 4 is bridging fault model；Wherein (a) is to send Bit1, and Bit0 is that (10) are received as Bit1, and Bit0 is (01)
Situation, (b) to send Bit1, Bit0 is the case where (01) is received as Bit1, and Bit0 is (10).
Specific embodiment
MRR fault detection means in a kind of PNoC, as shown in Figure 1, mainly by laser array, test vector generator,
Control vector generator, data coupler, MRR to be measured and rectangular box composition.
All MRR to be measured are divided into two classes, and a kind of MRR is to send MRR, and another kind of MRR is to receive MRR.In this hair
In bright preferred embodiment, MRR a total of 16 to be measured in PNoC, this 16 MRR are divided into two classes, and 8 MRR are by IP kernel for one kind
MRR as transmission, another kind of 8 MRR are used as received MRR by IP kernel.
Laser number included in laser array is identical as the sum of MRR to be measured in PNoC.Each laser
The laser light wave of 1 wavelength is generated, and the wavelength of laser light wave caused by all lasers is different, entire laser battle array
Column generate the laser optical path of wavelength-division multiplex.In a preferred embodiment of the invention, since the sum of MRR to be measured in PNoC is 16
It is a, it is therefore desirable to which that the number of the wavelength-division multiplex of acquisition is 16, has 16 lasers in laser array, generates 16 tunnel wavelength-divisions respectively
The laser light wave of multiplexing.
Test vector generator generates test vector, and the component of test vector is used to control the opening and closing of corresponding laser.?
In the preferred embodiment of the present invention, since the sum of MRR to be measured in PNoC is 16, control produced by control vector generator
The data broadband of vector processed is 16.When the component of test vector is 1, the light wave for generating respective wavelength is represented, i.e. unlatching phase
The laser answered；When the component of test vector is 0, the light wave for not generating respective wavelength is represented, that is, closes corresponding laser.
The input terminal of data coupler is separately connected laser array and test vector generator；Data coupler will be tested
Test vector caused by vector generator is coupled in laser optical path caused by laser array.It will by data coupler
Test vector is coupled in laser optical path.
The number of rectangular box is 1/2 of the sum of MRR to be measured in PNoC.By 4 IP kernels, 1 inside each rectangular box
Electric router and 1 photoelectric conversion interface composition.Circuit has 5 ports by device, wherein 1 port connects photoelectric conversion interface,
Other 4 ports connect 4 IP kernels.
Each rectangular box is connected by photoelectric conversion interface with 2 MRR to be measured, this 2 MRR to be measured are connected to electric light
Between the optical waveguide that module comes out and parallel main optical path；One of them MRR to be measured is used as by IP kernel sends MRR, another
MRR to be measured is used as transmission MRR as by IP kernel.
Control vector generator is connect with the control terminal of MRR to be measured all in PNoC.It controls vector generator and generates control
Vector processed, the component for controlling vector are used to control the opening and closing of corresponding MRR.In a preferred embodiment of the invention, due to each MRR
Have a control signal of an ON and OFF, therefore control vector generated by control vector generator, control 16 MRR ON and
OFF state, the component for controlling vector are 1 to represent that MRR is on state, and the component for controlling vector is 0 to represent MRR and be in OFF shape
State.
According to fault model, response data is tested by analysis, the failure of MRR is detected and analyzed.
As the present invention just for as manufacturing defect and MRR it is sensitive to temperature height fluctuation and caused by failure carry out
Detection, therefore fault model is established to MRR first.Establish three kinds of fault models:
(1) stagnant 1 failure (Stuck-at-one Fault):
Stuck-at-oneFault is referred to since manufacturing defect is dull in 1.As in, OFF shape is in by controlling MRR
State, receiving end should receive " 0 " at this time, actually receive " 1 " since manufacturing defect leads to " dull in 1 ".Referring to fig. 2.
(2) stagnant 0 failure (Stuck-at-zero Fault):
Stuck-at-zero Fault is referred to since manufacturing defect is dull in 0.In Fig. 2, it is in by controlling MRR
ON state, receiving end should receive " 1 " at this time, actually receive " 0 " since manufacturing defect leads to " dull in 0 ".Referring to
Fig. 3.
(3) bridging fault:
Bridging fault failure refers to causing bridging fault since MRR is sensitive to temperature height fluctuation.
In Fig. 4 (a), under non-failure conditions, MRR1 resonance optical wavelength is λ1；MRR2 resonance optical wavelength is λ2.At this time
Fault-free occurs, and the Bit1 received, Bit0 are (10).MRR1 fault-free, resonance optical wavelength are λ1；MRR2 is due to temperature
Height fluctuation is sensitive and causes resonance light wave wavelength shift, and resonance optical wavelength becomes λ1；Occur bridging fault at this time, receives
Bit1, Bit0 be (01).
In Fig. 4 (b), under non-failure conditions, MRR1 resonance optical wavelength is λ1；MRR2 resonance optical wavelength is λ2.At this time
Fault-free occurs, and the Bit1 received, Bit0 are (01).MRR1 fault-free, resonance optical wavelength are λ1, MRR2 is due to temperature
Height fluctuation is sensitive and causes resonance light wave wavelength shift, and resonance optical wavelength becomes λ1；Occur bridging fault at this time, receives
Bit1, Bit0 be (10).
MRR fault detection method in a kind of PNoC that above-mentioned apparatus is realized, specifically comprises the following steps:
That in known PNoC includes n MRR, this n MRR is respectively MRR1, MRR2 ... ..., MRRn, corresponding resonance
Optical wavelength is respectively W1, W2 ... ..., Wn, and W1 < W2 < ... < Wn.Then, produced by n laser in laser array
Optical maser wavelength be W1, W2 ... ..., Wn, and W1 < W2 < ... < Wn；The laser light of wavelength-division multiplex caused by laser array
Wave W1W2 ... Wn.
Vector is controlled by test vector generator and control vector generator load test vector sum, and obtains test and rings
It answers, and judges whether the MRR in PNoC breaks down and fault type accordingly:
Load is all 1 test vector and is all 0 control vector, if test obtained response is all 0, and loads and is all
1 test vector and it is all 1 control vector, if test obtained, which responds, is all 1, then it represents that all MRR do not break down；
In known PNoC when and an only MRR in the event of failure, steps are as follows: input test for MRR single fault detection method
Vector sum controls vector, is analyzed accordingly test response, judges three kinds of fault types before failure belongs in modeling:
Load is all 1 test vector and is all 0 control vector, if certain i for testing response obtained is 1, table
Show that stagnant 1 failure occurs in MRR corresponding to this.
Load is all 1 test vector and is all 1 control vector, if certain i for testing response obtained is 0, sentences
Disconnected i-th of MRR breaks down, need further load test vector sum control vector at this time judge failure be stagnant 0 failure or
Bridging fault；At this point, test vector is allowed to be all 1, controlling 1~i-1 of vector is 0, and i-th~n are 1；
If 1~i of test response obtained are 0, i+1~n when being 1, then judges i-th MRR appearance stagnant 0
Failure；
If it is obtained test response 1~i-1 in have and only one be 1, i-th bit for 0 and i+1~
N be 1 when, then judge that bridging fault occurs in i-th of MRR；
Above-mentioned i=1,2 ... ..., n；N is the positive integer more than or equal to 1.
In a preferred embodiment of the invention, it is assumed that the number in the channel wave division multiplexing WDM (Wave) is 16, it means that 16 tunnels
Wavelength being capable of simultaneous transmission.Assuming that in 16 MRR, when and only a MRR is faulty, 16 MRR are respectively MRR1,
MRR2 ... ..., MRR16, their corresponding resonance optical wavelengths are respectively W1, W2 ... ..., W16, and W1 < W2 < W3 ... <
W16.1W1: indicate that wavelength W1 loads 1,0W1 and indicates wavelength W1 load 0, other the rest may be inferred.
When and under the premise of only a MRR is faulty, different test vector and control vector are inputted, according to obtaining
Test response, whether faulty first determine whether out, then if faulty, judgement is specially that failure, i.e., specific judgement
Failure is stagnant 0 failure, stagnant 1 failure or bridging fault.
Load is all 1 test vector and is all 0 control vector, and obtains test response；If test response obtained
Certain i when being 1, then it represents that stagnant 1 failure occurs in MRR corresponding to this.
Load is all 1 test vector and is all 1 control vector, and obtains test response；If test response obtained is complete
When being 1, then it represents that all MRR do not break down；If certain i for testing response obtained is 0, then it represents that this institute
Corresponding MRR breaks down.Input test vector 1W1-1W2-1W3-1W4-1W5-1W6-1W7-1W8- ... -1W16, input
Control vector is all 1 (1111,1111,1111,1111), if obtained test response is (1111,1101,1111,1111).
Since only one MRR is faulty, it is evident that may determine that MRR7 is faulty soon from test response, but it is specific why
Kind failure can't determine.Because MRR7 may be bridging fault either stagnant 0 failure.When MRR7 resonance optical wavelength occurs
When moving to left, its resonance optical wavelength becomes smaller, that is, is less than W7, it may be possible to W1, W2, W3, W4, W5 or W6；When stagnant 0 event of generation
Barrier, it may have identical test response.
In order to specifically judge fault type, further load test vector sum control vector, i.e. load input test are needed
Vector 1W1-1W2-1W3-1W4-1W5-1W6-1W7-1W8- ... -1W16, input control vector (0000,0011,1111,
1111).If obtained test response is (0000,0001,1111,1111), then it may determine that MRR7 is stagnant 0 failure, because
By controlling vector, MRR1, MRR2 ... ..., MRR6 is completely in OFF state, at this time due to testing MRR1 in response,
MRR2 ... ..., MRR6 are all 0, indicate that there is no resonance optical wavelengths to move to left phenomenon by MRR7, that is, indicate that failure at this time is stagnant
0 failure；If obtained test response is (1000,0001,1111,1111), then it may determine that MRR7 is bridging fault, and
It may determine that MRR7 resonance optical wavelength moves to left, the resonance optical wavelength after MRR7 breaks down is W1 (as long as test response
Have in 1st to the 6th and only one 1 occur, so that it may judge MRR7 for bridging fault).
Above-described embodiment is only further described the purpose of the present invention, technical scheme and beneficial effects specific
A example, present invention is not limited to this.All any modifications made within the scope of disclosure of the invention, change equivalent replacement
Into etc., it is all included in the scope of protection of the present invention.
Claims (8)
- MRR fault detection means in 1.PNoC, characterized in that including laser array, test vector generator, control vector hair Raw device, data coupler, micro-ring resonator, that is, MRR to be measured and rectangular box；Laser number included in laser array is identical as the sum of micro-ring resonator to be measured；Each laser generates The laser light wave of 1 wavelength, and the wavelength of laser light wave caused by all lasers is different, entire laser array produces The laser light wave of raw wavelength-division multiplex；Test vector generator generates test vector, and each component of the test vector is used to control the opening and closing of corresponding laser；The input terminal of data coupler is separately connected laser array and test vector generator；Data coupler is by test vector Test vector caused by generator is coupled in the optical path of laser light wave caused by laser array；The number of rectangular box is 1/2 of the sum of micro-ring resonator to be measured in network on mating plate, that is, PNoC；Each rectangular box is by 4 A IP kernel, 1 electric router and 1 photoelectric conversion interface composition；4 IP kernels are connected with each other by 1 electric router, photoelectric conversion Electric router is connected by interface with the output end of data coupler；Each rectangular box is connected by photoelectric conversion interface with 2 micro-ring resonators to be measured, one of them micro-loop to be measured is humorous The device that shakes is used as by IP kernel sends micro-ring resonator, another micro-ring resonator to be measured is used as by IP kernel receives micro-ring resonator；Control vector generator is connect with the control terminal of micro-ring resonators to be measured all in network on mating plate；Control vector Device generates control vector, and each component of the control vector is used to control the opening and closing of corresponding micro-ring resonator.
- 2. MRR fault detection means in PNoC according to claim 1, characterized in that laser caused by each laser The wavelength of light wave is respectively identical as the resonance optical wavelength of 1 micro-ring resonator.
- 3. MRR fault detection means in PNoC according to claim 1 or claim 2, characterized in that swash caused by each laser The wavelength of light light wave is incremented by successively at equal intervals or successively decreases.
- 4. MRR fault detection means in PNoC according to claim 1, characterized in that generated by test vector generator Test vector go control laser opening and closing specifically:When the component of test vector is 1, the light wave for generating respective wavelength is represented, that is, opens corresponding laser；When the component of test vector is 0, the light wave for not generating respective wavelength is represented, that is, closes corresponding laser.
- 5. MRR fault detection means in PNoC according to claim 1, characterized in that generated by control vector generator Test vector go control micro-ring resonator opening and closing specifically:When the component for controlling vector is 1, it is in the open state to represent micro-ring resonator；When the component for controlling vector is 0, represents micro-ring resonator and be in close state.
- 6. MRR fault detection method in the PNoC realized based on claim 1 described device, characterized in that including walking as follows It is rapid:The laser of laser array generates the laser light wave of different wave length, and laser optical wavelength caused by each laser Corresponding 1 micro-ring resonator, that is, MRR resonance optical wavelength；Vector is controlled by test vector generator and control vector generator load test vector sum, and obtains test response, And judge whether the micro-ring resonator in network on mating plate i.e. PNoC breaks down and fault type accordingly；(I) if load is all 1 test vector and is all 0 control vector, test response obtained is all 0, and loads It is all 1 test vector and is all 1 control vector, when test response obtained is all 1, then it represents that all micro-ring resonators It does not break down；(II) if load is all 1 test vector and is all 0 control vector, when the i-th bit of test response obtained is 1, then table Show that stagnant 1 failure occurs in i-th of micro-ring resonator；(III) it if load is all 1 test vector and is all 1 control vector, when the i-th bit of test response obtained is 0, then needs Further to load be all 1 test vector and 1~i-1 for 0, the control vector that i-th~n are 1；If 1~i of test response obtained are 0, i+1~n is 1, then it represents that i-th of micro-ring resonator occurs Stagnant 0 failure；If having in 1~i-1 of test response obtained and only one being 1, i-th bit is 0 and i+1~n Position is 1, then it represents that bridging fault occurs in i-th of micro-ring resonator；Above-mentioned i=1,2 ... ..., n；N is the sum of micro-ring resonator in network on mating plate.
- 7. MRR fault detection method in PNoC according to claim 6, characterized in thatIn network on mating plate includes n micro-ring resonator, this n micro-ring resonator is respectively micro-ring resonator 1, micro-ring resonant Device 2 ... ..., micro-ring resonator n, corresponding resonance optical wavelength are respectively W1, W2 ... ..., Wn, and W1 < W2 < ... < Wn；Optical maser wavelength caused by n laser of laser array is W1, W2 ... ..., Wn, and W1 < W2 < ... < Wn；Above-mentioned n is the sum of micro-ring resonator in network on mating plate.
- 8. MRR fault detection method in PNoC according to claim 6, characterized in that in the event for determining micro-ring resonator Hinder type when, be based in network on mating plate when and an only micro-ring resonator it is faulty under the premise of carry out.
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Application publication date: 20170623 Assignee: Guilin Yinuo Yijin Information Technology Co.,Ltd. Assignor: GUILIN University OF ELECTRONIC TECHNOLOGY Contract record no.: X2023980044901 Denomination of invention: MRR Fault Detection Device and Method in PNoC Granted publication date: 20190215 License type: Common License Record date: 20231101 |